Merge tag 'gpio-updates-for-v6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "Here are the updates for this merge window from the GPIO subsystem.

  We have more lines removed than added thanks to dropping of a driver
  for a platform that's no longer supported. Otherwise the changes are
  pretty straightforward: support for some new models, various
  improvements to existing drivers, some tweaks to the core library code
  and DT bindings updates.

  Summary:

   - remove gpio-vr41xx driver as the only platform using it got dropped
     too

   - add support for suspend/resume to gpio-davinci

   - improvements to the GPIO character device code

   - add support for disabling bias for in-kernel users (up until now
     only user-space could set it)

   - drop unused devm_gpio_free()

   - fix a refcount issue in gpiolib OF

   - use device match helpers where applicable

   - add support for a new model to gpio-rockchip

   - non-functional improvements in gpio-adp5588

   - improve and simplify teardown in gpio-twl4030 and gpio-ucb1400

   - modernize the gpio-74xx-mmio and gpio-adnp drivers

   - coding style improvements in gpio-xilinx, gpio-104-idi-48

   - support new model (pca9571) in gpio-pca9570

   - convert the DT bindings to YAML for gpio-mvebu and update the
     document

   - don't return error codes from remove() in gpio-brcmstb

   - add a library for the intel 8255 PPI interface and use it in
     drivers

   - reduce using magic numbers and improve code readability in several
     drivers

   - convert DT bindings to YAML for gpio-tpic2810

   - add new models to DT bindings for gpio-frl-imx

   - Kconfig improvements

   - other minor tweaks and improvements"

* tag 'gpio-updates-for-v6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (52 commits)
  dt-bindings: gpio: fsl-imx-gpio: Add i.MXRT compatibles
  gpio: 74xx-mmio: Use bits instead of plain numbers for flags
  gpio: xilinx: add missing blank line after declarations
  MAINTAINERS: Update Intel 8255 GPIO driver file list
  gpio: gpio-mm: Implement and utilize register structures
  gpio: 104-idi-48: Implement and utilize register structures
  gpio: 104-dio-48e: Implement and utilize register structures
  gpio: i8255: Introduce the Intel 8255 interface library module
  gpio: 104-idio-16: Implement and utilize register structures
  gpio: ws16c48: Implement and utilize register structures
  gpio: remove VR41XX related gpio driver
  dt-bindings: gpio: add pull-disable flag
  gpiolib: acpi: support bias pull disable
  gpiolib: of: support bias pull disable
  gpiolib: add support for bias pull disable
  gpio: 74xx-mmio: use bits.h macros for all masks
  gpio: 74xx-mmio: Check MMIO_74XX_DIR_IN flag in mmio_74xx_dir_in()
  gpio: 74xx-mmio: Make use of device properties
  gpiolib: cdev: compile out HTE unless CONFIG_HTE selected
  gpiolib: cdev: consolidate edge detector configuration flags
  ...

47 files changed, 1197 insertions, 1452 deletions

diff --git a/Documentation/devicetree/bindings/arm/marvell/ap80x-system-controller.txt b/Documentation/devicetree/bindings/arm/marvell/ap80x-system-controller.txt
index 052a967c1f28..c83245065d44 100644
--- a/Documentation/devicetree/bindings/arm/marvell/ap80x-system-controller.txt
+++ b/Documentation/devicetree/bindings/arm/marvell/ap80x-system-controller.txt
@@ -72,7 +72,7 @@ mpp19	19	gpio, uart0(rxd), sdio(pw_off)
 GPIO:
 -----
 For common binding part and usage, refer to
-Documentation/devicetree/bindings/gpio/gpio-mvebu.txt.
+Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml.
 
 Required properties:
 
diff --git a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
index 0705e765f432..d84105c7c935 100644
--- a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
+++ b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
@@ -156,7 +156,7 @@ GPIO:
 -----
 
 For common binding part and usage, refer to
-Documentation/devicetree/bindings/gpio/gpio-mvebu.txt.
+Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml.
 
 Required properties:
 
diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
index f57d22d1ebd6..ae18603697d7 100644
--- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
@@ -37,6 +37,8 @@ properties:
               - fsl,imx8mp-gpio
               - fsl,imx8mq-gpio
               - fsl,imx8qxp-gpio
+              - fsl,imxrt1050-gpio
+              - fsl,imxrt1170-gpio
           - const: fsl,imx35-gpio
 
   reg:
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
deleted file mode 100644
index 0fc6700ed800..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
+++ /dev/null
@@ -1,93 +0,0 @@
-* Marvell EBU GPIO controller
-
-Required properties:
-
-- compatible : Should be "marvell,orion-gpio", "marvell,mv78200-gpio",
-  "marvell,armadaxp-gpio" or "marvell,armada-8k-gpio".
-
-    "marvell,orion-gpio" should be used for Orion, Kirkwood, Dove,
-    Discovery (except MV78200) and Armada 370. "marvell,mv78200-gpio"
-    should be used for the Discovery MV78200.
-
-    "marvel,armadaxp-gpio" should be used for all Armada XP SoCs
-    (MV78230, MV78260, MV78460).
-
-    "marvell,armada-8k-gpio" should be used for the Armada 7K and 8K
-    SoCs (either from AP or CP), see
-    Documentation/devicetree/bindings/arm/marvell/ap80x-system-controller.txt
-    for specific details about the offset property.
-
-- reg: Address and length of the register set for the device. Only one
-  entry is expected, except for the "marvell,armadaxp-gpio" variant
-  for which two entries are expected: one for the general registers,
-  one for the per-cpu registers. Not used for marvell,armada-8k-gpio.
-
-- interrupts: The list of interrupts that are used for all the pins
-  managed by this GPIO bank. There can be more than one interrupt
-  (example: 1 interrupt per 8 pins on Armada XP, which means 4
-  interrupts per bank of 32 GPIOs).
-
-- interrupt-controller: identifies the node as an interrupt controller
-
-- #interrupt-cells: specifies the number of cells needed to encode an
-  interrupt source. Should be two.
-  The first cell is the GPIO number.
-  The second cell is used to specify flags:
-    bits[3:0] trigger type and level flags:
-      1 = low-to-high edge triggered.
-      2 = high-to-low edge triggered.
-      4 = active high level-sensitive.
-      8 = active low level-sensitive.
-
-- gpio-controller: marks the device node as a gpio controller
-
-- ngpios: number of GPIOs this controller has
-
-- #gpio-cells: Should be two. The first cell is the pin number. The
-  second cell is reserved for flags, unused at the moment.
-
-Optional properties:
-
-In order to use the GPIO lines in PWM mode, some additional optional
-properties are required.
-
-- compatible: Must contain "marvell,armada-370-gpio"
-
-- reg: an additional register set is needed, for the GPIO Blink
-  Counter on/off registers.
-
-- reg-names: Must contain an entry "pwm" corresponding to the
-  additional register range needed for PWM operation.
-
-- #pwm-cells: Should be two. The first cell is the GPIO line number. The
-  second cell is the period in nanoseconds.
-
-- clocks: Must be a phandle to the clock for the GPIO controller.
-
-Example:
-
-		gpio0: gpio@d0018100 {
-			compatible = "marvell,armadaxp-gpio";
-			reg = <0xd0018100 0x40>,
-			    <0xd0018800 0x30>;
-			ngpios = <32>;
-			gpio-controller;
-			#gpio-cells = <2>;
-			interrupt-controller;
-			#interrupt-cells = <2>;
-			interrupts = <16>, <17>, <18>, <19>;
-		};
-
-		gpio1: gpio@18140 {
-			compatible = "marvell,armada-370-gpio";
-			reg = <0x18140 0x40>, <0x181c8 0x08>;
-			reg-names = "gpio", "pwm";
-			ngpios = <17>;
-			gpio-controller;
-			#gpio-cells = <2>;
-			#pwm-cells = <2>;
-			interrupt-controller;
-			#interrupt-cells = <2>;
-			interrupts = <87>, <88>, <89>;
-			clocks = <&coreclk 0>;
-		};
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml b/Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml
new file mode 100644
index 000000000000..f1bd1e6b2e1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-mvebu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Marvell EBU GPIO controller
+
+maintainers:
+  - Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+  - Andrew Lunn <andrew@lunn.ch>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - marvell,armada-8k-gpio
+          - marvell,orion-gpio
+
+      - items:
+          - enum:
+              - marvell,mv78200-gpio
+              - marvell,armada-370-gpio
+          - const: marvell,orion-gpio
+
+      - description: Deprecated binding
+        items:
+          - const: marvell,armadaxp-gpio
+          - const: marvell,orion-gpio
+        deprecated: true
+
+  reg:
+    description: |
+      Address and length of the register set for the device. Not used for
+      marvell,armada-8k-gpio.
+
+      A second entry can be provided, for the PWM function using the GPIO Blink
+      Counter on/off registers.
+    minItems: 1
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: gpio
+      - const: pwm
+    minItems: 1
+
+  offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Offset in the register map for the gpio registers (in bytes)
+
+  interrupts:
+    description: |
+      The list of interrupts that are used for all the pins managed by this
+      GPIO bank. There can be more than one interrupt (example: 1 interrupt
+      per 8 pins on Armada XP, which means 4 interrupts per bank of 32
+      GPIOs).
+    minItems: 1
+    maxItems: 4
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 2
+
+  gpio-controller: true
+
+  ngpios:
+    minimum: 1
+    maximum: 32
+
+  "#gpio-cells":
+    const: 2
+
+  marvell,pwm-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Offset in the register map for the pwm registers (in bytes)
+
+  "#pwm-cells":
+    description:
+      The first cell is the GPIO line number. The second cell is the period
+      in nanoseconds.
+    const: 2
+
+  clocks:
+    description:
+      Clock(s) used for PWM function.
+    items:
+      - description: Core clock
+      - description: AXI bus clock
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: core
+      - const: axi
+    minItems: 1
+
+required:
+  - compatible
+  - gpio-controller
+  - ngpios
+  - "#gpio-cells"
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: marvell,armada-8k-gpio
+    then:
+      required:
+        - offset
+    else:
+      required:
+        - reg
+
+unevaluatedProperties: true
+
+examples:
+  - |
+    gpio@d0018100 {
+      compatible = "marvell,armadaxp-gpio", "marvell,orion-gpio";
+      reg = <0xd0018100 0x40>, <0xd0018800 0x30>;
+      ngpios = <32>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      interrupts = <16>, <17>, <18>, <19>;
+    };
+
+  - |
+    gpio@18140 {
+      compatible = "marvell,armada-370-gpio", "marvell,orion-gpio";
+      reg = <0x18140 0x40>, <0x181c8 0x08>;
+      reg-names = "gpio", "pwm";
+      ngpios = <17>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      #pwm-cells = <2>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      interrupts = <87>, <88>, <89>;
+      clocks = <&coreclk 0>;
+    };
diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml b/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml
index 338c5312a106..1acaa0a3d35a 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml
+++ b/Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml
@@ -13,6 +13,7 @@ properties:
   compatible:
     enum:
       - nxp,pca9570
+      - nxp,pca9571
 
   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/gpio/gpio-tpic2810.txt b/Documentation/devicetree/bindings/gpio/gpio-tpic2810.txt
deleted file mode 100644
index 1afc2de7a537..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-tpic2810.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-TPIC2810 GPIO controller bindings
-
-Required properties:
- - compatible		: Should be "ti,tpic2810".
- - reg			: The I2C address of the device
- - gpio-controller	: Marks the device node as a GPIO controller.
- - #gpio-cells		: Should be two. For consumer use see gpio.txt.
-
-Example:
-
-	gpio@60 {
-		compatible = "ti,tpic2810";
-		reg = <0x60>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
diff --git a/Documentation/devicetree/bindings/gpio/gpio-tpic2810.yaml b/Documentation/devicetree/bindings/gpio/gpio-tpic2810.yaml
new file mode 100644
index 000000000000..cb8a5c376e1e
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-tpic2810.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-tpic2810.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TPIC2810 GPIO controller bindings
+
+maintainers:
+  - Aswath Govindraju <a-govindraju@ti.com>
+
+properties:
+  compatible:
+    enum:
+      - ti,tpic2810
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+  gpio-line-names:
+    minItems: 1
+    maxItems: 32
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        gpio@60 {
+            compatible = "ti,tpic2810";
+            reg = <0x60>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            gpio-line-names = "LED A", "LED B", "LED C";
+        };
+    };
diff --git a/Documentation/devicetree/bindings/gpio/renesas,rcar-gpio.yaml b/Documentation/devicetree/bindings/gpio/renesas,rcar-gpio.yaml
index 0681a4790cd6..75e5da6a7cc0 100644
--- a/Documentation/devicetree/bindings/gpio/renesas,rcar-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/renesas,rcar-gpio.yaml
@@ -49,10 +49,8 @@ properties:
           - const: renesas,rcar-gen3-gpio # R-Car Gen3 or RZ/G2
 
       - items:
-          - const: renesas,gpio-r8a779a0  # R-Car V3U
-
-      - items:
           - enum:
+              - renesas,gpio-r8a779a0     # R-Car V3U
               - renesas,gpio-r8a779f0     # R-Car S4-8
           - const: renesas,rcar-gen4-gpio # R-Car Gen4
 
diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index d4e42c2b995b..affd823c881d 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -27,6 +27,8 @@ properties:
       - description: APB interface clock source
       - description: GPIO debounce reference clock source
 
+  gpio-ranges: true
+
   gpio-controller: true
 
   gpio-line-names: true
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 2d39967bafcc..55272942e721 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -277,7 +277,6 @@ GPIO
   devm_gpiochip_add_data()
   devm_gpio_request()
   devm_gpio_request_one()
-  devm_gpio_free()
 
 I2C
   devm_i2c_new_dummy_device()
diff --git a/MAINTAINERS b/MAINTAINERS
index b169646de59a..05ebeb5b9495 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10045,6 +10045,13 @@ L:	linux-fbdev@vger.kernel.org
 S:	Maintained
 F:	drivers/video/fbdev/i810/
 
+INTEL 8255 GPIO DRIVER
+M:	William Breathitt Gray <william.gray@linaro.org>
+L:	linux-gpio@vger.kernel.org
+S:	Maintained
+F:	drivers/gpio/gpio-i8255.c
+F:	drivers/gpio/gpio-i8255.h
+
 INTEL ASoC DRIVERS
 M:	Cezary Rojewski <cezary.rojewski@intel.com>
 M:	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
@@ -16503,7 +16510,7 @@ L:	linux-pwm@vger.kernel.org
 S:	Maintained
 Q:	https://patchwork.ozlabs.org/project/linux-pwm/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm.git
-F:	Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
+F:	Documentation/devicetree/bindings/gpio/gpio-mvebu.yaml
 F:	Documentation/devicetree/bindings/pwm/
 F:	Documentation/driver-api/pwm.rst
 F:	drivers/gpio/gpio-mvebu.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b01961999ced..0642f579196f 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -544,6 +544,7 @@ config GPIO_SAMA5D2_PIOBU
 	tristate "SAMA5D2 PIOBU GPIO support"
 	depends on MFD_SYSCON
 	depends on OF_GPIO
+	depends on ARCH_AT91 || COMPILE_TEST
 	select GPIO_SYSCON
 	help
 	  Say yes here to use the PIOBU pins as GPIOs.
@@ -690,12 +691,6 @@ config GPIO_VISCONTI
 	help
 	  Say yes here to support GPIO on Tohisba Visconti.
 
-config GPIO_VR41XX
-	tristate "NEC VR4100 series General-purpose I/O Unit support"
-	depends on CPU_VR41XX
-	help
-	  Say yes here to support the NEC VR4100 series General-purpose I/O Unit.
-
 config GPIO_VX855
 	tristate "VIA VX855/VX875 GPIO"
 	depends on (X86 || COMPILE_TEST) && PCI
@@ -829,11 +824,24 @@ endmenu
 menu "Port-mapped I/O GPIO drivers"
 	depends on X86 # Unconditional I/O space access
 
+config GPIO_I8255
+	tristate
+	help
+	  Enables support for the i8255 interface library functions. The i8255
+	  interface library provides functions to facilitate communication with
+	  interfaces compatible with the venerable Intel 8255 Programmable
+	  Peripheral Interface (PPI). The Intel 8255 PPI chip was first released
+	  in the early 1970s but compatible interfaces are nowadays typically
+	  found embedded in larger VLSI processing chips and FPGA components.
+
+	  If built as a module its name will be gpio-i8255.
+
 config GPIO_104_DIO_48E
 	tristate "ACCES 104-DIO-48E GPIO support"
 	depends on PC104
 	select ISA_BUS_API
 	select GPIOLIB_IRQCHIP
+	select GPIO_I8255
 	help
 	  Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
 	  104-DIO-24E). The base port addresses for the devices may be
@@ -857,6 +865,7 @@ config GPIO_104_IDI_48
 	depends on PC104
 	select ISA_BUS_API
 	select GPIOLIB_IRQCHIP
+	select GPIO_I8255
 	help
 	  Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
 	  104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
@@ -877,6 +886,7 @@ config GPIO_GPIO_MM
 	tristate "Diamond Systems GPIO-MM GPIO support"
 	depends on PC104
 	select ISA_BUS_API
+	select GPIO_I8255
 	help
 	  Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
 
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 14352f6dfe8e..a0985d30f51b 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_GPIO_GW_PLD)		+= gpio-gw-pld.o
 obj-$(CONFIG_GPIO_HISI)                 += gpio-hisi.o
 obj-$(CONFIG_GPIO_HLWD)			+= gpio-hlwd.o
 obj-$(CONFIG_HTC_EGPIO)			+= gpio-htc-egpio.o
+obj-$(CONFIG_GPIO_I8255)		+= gpio-i8255.o
 obj-$(CONFIG_GPIO_ICH)			+= gpio-ich.o
 obj-$(CONFIG_GPIO_IDT3243X)		+= gpio-idt3243x.o
 obj-$(CONFIG_GPIO_IOP)			+= gpio-iop.o
@@ -169,7 +170,6 @@ obj-$(CONFIG_GPIO_VF610)		+= gpio-vf610.o
 obj-$(CONFIG_GPIO_VIPERBOARD)		+= gpio-viperboard.o
 obj-$(CONFIG_GPIO_VIRTIO)		+= gpio-virtio.o
 obj-$(CONFIG_GPIO_VISCONTI)		+= gpio-visconti.o
-obj-$(CONFIG_GPIO_VR41XX)		+= gpio-vr41xx.o
 obj-$(CONFIG_GPIO_VX855)		+= gpio-vx855.o
 obj-$(CONFIG_GPIO_WCD934X)		+= gpio-wcd934x.o
 obj-$(CONFIG_GPIO_WHISKEY_COVE)		+= gpio-wcove.o
diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index f118ad9bcd33..a41551870759 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -6,8 +6,7 @@
  * This driver supports the following ACCES devices: 104-DIO-48E and
  * 104-DIO-24E.
  */
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
+#include <linux/bits.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
@@ -20,6 +19,11 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include "gpio-i8255.h"
+
+MODULE_IMPORT_NS(I8255);
 
 #define DIO48E_EXTENT 16
 #define MAX_NUM_DIO48E max_num_isa_dev(DIO48E_EXTENT)
@@ -33,34 +37,54 @@ static unsigned int irq[MAX_NUM_DIO48E];
 module_param_hw_array(irq, uint, irq, NULL, 0);
 MODULE_PARM_DESC(irq, "ACCES 104-DIO-48E interrupt line numbers");
 
+#define DIO48E_NUM_PPI 2
+
+/**
+ * struct dio48e_reg - device register structure
+ * @ppi:		Programmable Peripheral Interface groups
+ * @enable_buffer:	Enable/Disable Buffer groups
+ * @unused1:		Unused
+ * @enable_interrupt:	Write: Enable Interrupt
+ *			Read: Disable Interrupt
+ * @unused2:		Unused
+ * @enable_counter:	Write: Enable Counter/Timer Addressing
+ *			Read: Disable Counter/Timer Addressing
+ * @unused3:		Unused
+ * @clear_interrupt:	Clear Interrupt
+ */
+struct dio48e_reg {
+	struct i8255 ppi[DIO48E_NUM_PPI];
+	u8 enable_buffer[DIO48E_NUM_PPI];
+	u8 unused1;
+	u8 enable_interrupt;
+	u8 unused2;
+	u8 enable_counter;
+	u8 unused3;
+	u8 clear_interrupt;
+};
+
 /**
  * struct dio48e_gpio - GPIO device private data structure
- * @chip:	instance of the gpio_chip
- * @io_state:	bit I/O state (whether bit is set to input or output)
- * @out_state:	output bits state
- * @control:	Control registers state
- * @lock:	synchronization lock to prevent I/O race conditions
- * @base:	base port address of the GPIO device
- * @irq_mask:	I/O bits affected by interrupts
+ * @chip:		instance of the gpio_chip
+ * @ppi_state:		PPI device states
+ * @lock:		synchronization lock to prevent I/O race conditions
+ * @reg:		I/O address offset for the device registers
+ * @irq_mask:		I/O bits affected by interrupts
  */
 struct dio48e_gpio {
 	struct gpio_chip chip;
-	unsigned char io_state[6];
-	unsigned char out_state[6];
-	unsigned char control[2];
+	struct i8255_state ppi_state[DIO48E_NUM_PPI];
 	raw_spinlock_t lock;
-	void __iomem *base;
+	struct dio48e_reg __iomem *reg;
 	unsigned char irq_mask;
 };
 
 static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
 
-	if (dio48egpio->io_state[port] & mask)
-		return  GPIO_LINE_DIRECTION_IN;
+	if (i8255_get_direction(dio48egpio->ppi_state, offset))
+		return GPIO_LINE_DIRECTION_IN;
 
 	return GPIO_LINE_DIRECTION_OUT;
 }
@@ -68,38 +92,9 @@ static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned int offset
 static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned int io_port = offset / 8;
-	const unsigned int control_port = io_port / 3;
-	void __iomem *const control_addr = dio48egpio->base + 3 + control_port * 4;
-	unsigned long flags;
-	unsigned int control;
-
-	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
-	/* Check if configuring Port C */
-	if (io_port == 2 || io_port == 5) {
-		/* Port C can be configured by nibble */
-		if (offset % 8 > 3) {
-			dio48egpio->io_state[io_port] |= 0xF0;
-			dio48egpio->control[control_port] |= BIT(3);
-		} else {
-			dio48egpio->io_state[io_port] |= 0x0F;
-			dio48egpio->control[control_port] |= BIT(0);
-		}
-	} else {
-		dio48egpio->io_state[io_port] |= 0xFF;
-		if (io_port == 0 || io_port == 3)
-			dio48egpio->control[control_port] |= BIT(4);
-		else
-			dio48egpio->control[control_port] |= BIT(1);
-	}
-
-	control = BIT(7) | dio48egpio->control[control_port];
-	iowrite8(control, control_addr);
-	control &= ~BIT(7);
-	iowrite8(control, control_addr);
-
-	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
+	i8255_direction_input(dio48egpio->reg->ppi, dio48egpio->ppi_state,
+			      offset);
 
 	return 0;
 }
@@ -108,48 +103,9 @@ static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned int off
 					int value)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned int io_port = offset / 8;
-	const unsigned int control_port = io_port / 3;
-	const unsigned int mask = BIT(offset % 8);
-	void __iomem *const control_addr = dio48egpio->base + 3 + control_port * 4;
-	const unsigned int out_port = (io_port > 2) ? io_port + 1 : io_port;
-	unsigned long flags;
-	unsigned int control;
-
-	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
-
-	/* Check if configuring Port C */
-	if (io_port == 2 || io_port == 5) {
-		/* Port C can be configured by nibble */
-		if (offset % 8 > 3) {
-			dio48egpio->io_state[io_port] &= 0x0F;
-			dio48egpio->control[control_port] &= ~BIT(3);
-		} else {
-			dio48egpio->io_state[io_port] &= 0xF0;
-			dio48egpio->control[control_port] &= ~BIT(0);
-		}
-	} else {
-		dio48egpio->io_state[io_port] &= 0x00;
-		if (io_port == 0 || io_port == 3)
-			dio48egpio->control[control_port] &= ~BIT(4);
-		else
-			dio48egpio->control[control_port] &= ~BIT(1);
-	}
-
-	if (value)
-		dio48egpio->out_state[io_port] |= mask;
-	else
-		dio48egpio->out_state[io_port] &= ~mask;
 
-	control = BIT(7) | dio48egpio->control[control_port];
-	iowrite8(control, control_addr);
-
-	iowrite8(dio48egpio->out_state[io_port], dio48egpio->base + out_port);
-
-	control &= ~BIT(7);
-	iowrite8(control, control_addr);
-
-	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
+	i8255_direction_output(dio48egpio->reg->ppi, dio48egpio->ppi_state,
+			       offset, value);
 
 	return 0;
 }
@@ -157,47 +113,16 @@ static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned int off
 static int dio48e_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
-	const unsigned int in_port = (port > 2) ? port + 1 : port;
-	unsigned long flags;
-	unsigned int port_state;
-
-	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
-	/* ensure that GPIO is set for input */
-	if (!(dio48egpio->io_state[port] & mask)) {
-		raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
-		return -EINVAL;
-	}
-
-	port_state = ioread8(dio48egpio->base + in_port);
-
-	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
-
-	return !!(port_state & mask);
+	return i8255_get(dio48egpio->reg->ppi, offset);
 }
 
-static const size_t ports[] = { 0, 1, 2, 4, 5, 6 };
-
 static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	unsigned long *bits)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	unsigned long offset;
-	unsigned long gpio_mask;
-	void __iomem *port_addr;
-	unsigned long port_state;
 
-	/* clear bits array to a clean slate */
-	bitmap_zero(bits, chip->ngpio);
-
-	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
-		port_addr = dio48egpio->base + ports[offset / 8];
-		port_state = ioread8(port_addr) & gpio_mask;
-
-		bitmap_set_value8(bits, port_state, offset);
-	}
+	i8255_get_multiple(dio48egpio->reg->ppi, mask, bits, chip->ngpio);
 
 	return 0;
 }
@@ -205,49 +130,17 @@ static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 static void dio48e_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
-	const unsigned int out_port = (port > 2) ? port + 1 : port;
-	unsigned long flags;
 
-	raw_spin_lock_irqsave(&dio48egpio->lock, flags);
-
-	if (value)
-		dio48egpio->out_state[port] |= mask;
-	else
-		dio48egpio->out_state[port] &= ~mask;
-
-	iowrite8(dio48egpio->out_state[port], dio48egpio->base + out_port);
-
-	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
+	i8255_set(dio48egpio->reg->ppi, dio48egpio->ppi_state, offset, value);
 }
 
 static void dio48e_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long *mask, unsigned long *bits)
 {
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
-	unsigned long offset;
-	unsigned long gpio_mask;
-	size_t index;
-	void __iomem *port_addr;
-	unsigned long bitmask;
-	unsigned long flags;
-
-	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
-		index = offset / 8;
-		port_addr = dio48egpio->base + ports[index];
-
-		bitmask = bitmap_get_value8(bits, offset) & gpio_mask;
-
-		raw_spin_lock_irqsave(&dio48egpio->lock, flags);
 
-		/* update output state data and set device gpio register */
-		dio48egpio->out_state[index] &= ~gpio_mask;
-		dio48egpio->out_state[index] |= bitmask;
-		iowrite8(dio48egpio->out_state[index], port_addr);
-
-		raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
-	}
+	i8255_set_multiple(dio48egpio->reg->ppi, dio48egpio->ppi_state, mask,
+			   bits, chip->ngpio);
 }
 
 static void dio48e_irq_ack(struct irq_data *data)
@@ -274,7 +167,7 @@ static void dio48e_irq_mask(struct irq_data *data)
 
 	if (!dio48egpio->irq_mask)
 		/* disable interrupts */
-		ioread8(dio48egpio->base + 0xB);
+		ioread8(&dio48egpio->reg->enable_interrupt);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 }
@@ -294,8 +187,8 @@ static void dio48e_irq_unmask(struct irq_data *data)
 
 	if (!dio48egpio->irq_mask) {
 		/* enable interrupts */
-		iowrite8(0x00, dio48egpio->base + 0xF);
-		iowrite8(0x00, dio48egpio->base + 0xB);
+		iowrite8(0x00, &dio48egpio->reg->clear_interrupt);
+		iowrite8(0x00, &dio48egpio->reg->enable_interrupt);
 	}
 
 	if (offset == 19)
@@ -341,7 +234,7 @@ static irqreturn_t dio48e_irq_handler(int irq, void *dev_id)
 
 	raw_spin_lock(&dio48egpio->lock);
 
-	iowrite8(0x00, dio48egpio->base + 0xF);
+	iowrite8(0x00, &dio48egpio->reg->clear_interrupt);
 
 	raw_spin_unlock(&dio48egpio->lock);
 
@@ -373,11 +266,26 @@ static int dio48e_irq_init_hw(struct gpio_chip *gc)
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	ioread8(dio48egpio->base + 0xB);
+	ioread8(&dio48egpio->reg->enable_interrupt);
 
 	return 0;
 }
 
+static void dio48e_init_ppi(struct i8255 __iomem *const ppi,
+			    struct i8255_state *const ppi_state)
+{
+	const unsigned long ngpio = 24;
+	const unsigned long mask = GENMASK(ngpio - 1, 0);
+	const unsigned long bits = 0;
+	unsigned long i;
+
+	/* Initialize all GPIO to output 0 */
+	for (i = 0; i < DIO48E_NUM_PPI; i++) {
+		i8255_mode0_output(&ppi[i]);
+		i8255_set_multiple(&ppi[i], &ppi_state[i], &mask, &bits, ngpio);
+	}
+}
+
 static int dio48e_probe(struct device *dev, unsigned int id)
 {
 	struct dio48e_gpio *dio48egpio;
@@ -395,8 +303,8 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
-	dio48egpio->base = devm_ioport_map(dev, base[id], DIO48E_EXTENT);
-	if (!dio48egpio->base)
+	dio48egpio->reg = devm_ioport_map(dev, base[id], DIO48E_EXTENT);
+	if (!dio48egpio->reg)
 		return -ENOMEM;
 
 	dio48egpio->chip.label = name;
@@ -425,17 +333,8 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 
 	raw_spin_lock_init(&dio48egpio->lock);
 
-	/* initialize all GPIO as output */
-	iowrite8(0x80, dio48egpio->base + 3);
-	iowrite8(0x00, dio48egpio->base);
-	iowrite8(0x00, dio48egpio->base + 1);
-	iowrite8(0x00, dio48egpio->base + 2);
-	iowrite8(0x00, dio48egpio->base + 3);
-	iowrite8(0x80, dio48egpio->base + 7);
-	iowrite8(0x00, dio48egpio->base + 4);
-	iowrite8(0x00, dio48egpio->base + 5);
-	iowrite8(0x00, dio48egpio->base + 6);
-	iowrite8(0x00, dio48egpio->base + 7);
+	i8255_state_init(dio48egpio->ppi_state, DIO48E_NUM_PPI);
+	dio48e_init_ppi(dio48egpio->reg->ppi, dio48egpio->ppi_state);
 
 	err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
 	if (err) {
diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 9521ece3ebef..40be76efeed7 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -6,8 +6,7 @@
  * This driver supports the following ACCES devices: 104-IDI-48A,
  * 104-IDI-48AC, 104-IDI-48B, and 104-IDI-48BC.
  */
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
+#include <linux/bits.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
@@ -20,6 +19,11 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include "gpio-i8255.h"
+
+MODULE_IMPORT_NS(I8255);
 
 #define IDI_48_EXTENT 8
 #define MAX_NUM_IDI_48 max_num_isa_dev(IDI_48_EXTENT)
@@ -34,72 +38,61 @@ module_param_hw_array(irq, uint, irq, NULL, 0);
 MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers");
 
 /**
+ * struct idi_48_reg - device register structure
+ * @port0:	Port 0 Inputs
+ * @unused:	Unused
+ * @port1:	Port 1 Inputs
+ * @irq:	Read: IRQ Status Register/IRQ Clear
+ *		Write: IRQ Enable/Disable
+ */
+struct idi_48_reg {
+	u8 port0[3];
+	u8 unused;
+	u8 port1[3];
+	u8 irq;
+};
+
+/**
  * struct idi_48_gpio - GPIO device private data structure
  * @chip:	instance of the gpio_chip
  * @lock:	synchronization lock to prevent I/O race conditions
- * @ack_lock:	synchronization lock to prevent IRQ handler race conditions
  * @irq_mask:	input bits affected by interrupts
- * @base:	base port address of the GPIO device
+ * @reg:	I/O address offset for the device registers
  * @cos_enb:	Change-Of-State IRQ enable boundaries mask
  */
 struct idi_48_gpio {
 	struct gpio_chip chip;
-	raw_spinlock_t lock;
-	spinlock_t ack_lock;
+	spinlock_t lock;
 	unsigned char irq_mask[6];
-	void __iomem *base;
+	struct idi_48_reg __iomem *reg;
 	unsigned char cos_enb;
 };
 
-static int idi_48_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+static int idi_48_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
 {
 	return GPIO_LINE_DIRECTION_IN;
 }
 
-static int idi_48_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+static int idi_48_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 {
 	return 0;
 }
 
-static int idi_48_gpio_get(struct gpio_chip *chip, unsigned offset)
+static int idi_48_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
-	unsigned i;
-	static const unsigned int register_offset[6] = { 0, 1, 2, 4, 5, 6 };
-	void __iomem *port_addr;
-	unsigned mask;
-
-	for (i = 0; i < 48; i += 8)
-		if (offset < i + 8) {
-			port_addr = idi48gpio->base + register_offset[i / 8];
-			mask = BIT(offset - i);
-
-			return !!(ioread8(port_addr) & mask);
-		}
+	void __iomem *const ppi = idi48gpio->reg;
 
-	/* The following line should never execute since offset < 48 */
-	return 0;
+	return i8255_get(ppi, offset);
 }
 
 static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	unsigned long *bits)
 {
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
-	unsigned long offset;
-	unsigned long gpio_mask;
-	static const size_t ports[] = { 0, 1, 2, 4, 5, 6 };
-	void __iomem *port_addr;
-	unsigned long port_state;
-
-	/* clear bits array to a clean slate */
-	bitmap_zero(bits, chip->ngpio);
+	void __iomem *const ppi = idi48gpio->reg;
 
-	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
-		port_addr = idi48gpio->base + ports[offset / 8];
-		port_state = ioread8(port_addr) & gpio_mask;
-
-		bitmap_set_value8(bits, port_state, offset);
-	}
+	i8255_get_multiple(ppi, mask, bits, chip->ngpio);
 
 	return 0;
 }
@@ -112,67 +105,56 @@ static void idi_48_irq_mask(struct irq_data *data)
 {
 	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
-	const unsigned offset = irqd_to_hwirq(data);
-	unsigned i;
-	unsigned mask;
-	unsigned boundary;
+	const unsigned int offset = irqd_to_hwirq(data);
+	const unsigned long boundary = offset / 8;
+	const unsigned long mask = BIT(offset % 8);
 	unsigned long flags;
 
-	for (i = 0; i < 48; i += 8)
-		if (offset < i + 8) {
-			mask = BIT(offset - i);
-			boundary = i / 8;
-
-			idi48gpio->irq_mask[boundary] &= ~mask;
+	spin_lock_irqsave(&idi48gpio->lock, flags);
 
-			if (!idi48gpio->irq_mask[boundary]) {
-				idi48gpio->cos_enb &= ~BIT(boundary);
+	idi48gpio->irq_mask[boundary] &= ~mask;
 
-				raw_spin_lock_irqsave(&idi48gpio->lock, flags);
+	/* Exit early if there are still input lines with IRQ unmasked */
+	if (idi48gpio->irq_mask[boundary])
+		goto exit;
 
-				iowrite8(idi48gpio->cos_enb, idi48gpio->base + 7);
+	idi48gpio->cos_enb &= ~BIT(boundary);
 
-				raw_spin_unlock_irqrestore(&idi48gpio->lock, flags);
-			}
+	iowrite8(idi48gpio->cos_enb, &idi48gpio->reg->irq);
 
-			return;
-		}
+exit:
+	spin_unlock_irqrestore(&idi48gpio->lock, flags);
 }
 
 static void idi_48_irq_unmask(struct irq_data *data)
 {
 	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
-	const unsigned offset = irqd_to_hwirq(data);
-	unsigned i;
-	unsigned mask;
-	unsigned boundary;
-	unsigned prev_irq_mask;
+	const unsigned int offset = irqd_to_hwirq(data);
+	const unsigned long boundary = offset / 8;
+	const unsigned long mask = BIT(offset % 8);
+	unsigned int prev_irq_mask;
 	unsigned long flags;
 
-	for (i = 0; i < 48; i += 8)
-		if (offset < i + 8) {
-			mask = BIT(offset - i);
-			boundary = i / 8;
-			prev_irq_mask = idi48gpio->irq_mask[boundary];
+	spin_lock_irqsave(&idi48gpio->lock, flags);
 
-			idi48gpio->irq_mask[boundary] |= mask;
+	prev_irq_mask = idi48gpio->irq_mask[boundary];
 
-			if (!prev_irq_mask) {
-				idi48gpio->cos_enb |= BIT(boundary);
+	idi48gpio->irq_mask[boundary] |= mask;
 
-				raw_spin_lock_irqsave(&idi48gpio->lock, flags);
+	/* Exit early if IRQ was already unmasked for this boundary */
+	if (prev_irq_mask)
+		goto exit;
 
-				iowrite8(idi48gpio->cos_enb, idi48gpio->base + 7);
+	idi48gpio->cos_enb |= BIT(boundary);
 
-				raw_spin_unlock_irqrestore(&idi48gpio->lock, flags);
-			}
+	iowrite8(idi48gpio->cos_enb, &idi48gpio->reg->irq);
 
-			return;
-		}
+exit:
+	spin_unlock_irqrestore(&idi48gpio->lock, flags);
 }
 
-static int idi_48_irq_set_type(struct irq_data *data, unsigned flow_type)
+static int idi_48_irq_set_type(struct irq_data *data, unsigned int flow_type)
 {
 	/* The only valid irq types are none and both-edges */
 	if (flow_type != IRQ_TYPE_NONE &&
@@ -200,17 +182,13 @@ static irqreturn_t idi_48_irq_handler(int irq, void *dev_id)
 	unsigned long gpio;
 	struct gpio_chip *const chip = &idi48gpio->chip;
 
-	spin_lock(&idi48gpio->ack_lock);
-
-	raw_spin_lock(&idi48gpio->lock);
-
-	cos_status = ioread8(idi48gpio->base + 7);
+	spin_lock(&idi48gpio->lock);
 
-	raw_spin_unlock(&idi48gpio->lock);
+	cos_status = ioread8(&idi48gpio->reg->irq);
 
 	/* IRQ Status (bit 6) is active low (0 = IRQ generated by device) */
 	if (cos_status & BIT(6)) {
-		spin_unlock(&idi48gpio->ack_lock);
+		spin_unlock(&idi48gpio->lock);
 		return IRQ_NONE;
 	}
 
@@ -228,7 +206,7 @@ static irqreturn_t idi_48_irq_handler(int irq, void *dev_id)
 		}
 	}
 
-	spin_unlock(&idi48gpio->ack_lock);
+	spin_unlock(&idi48gpio->lock);
 
 	return IRQ_HANDLED;
 }
@@ -250,8 +228,8 @@ static int idi_48_irq_init_hw(struct gpio_chip *gc)
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	iowrite8(0, idi48gpio->base + 7);
-	ioread8(idi48gpio->base + 7);
+	iowrite8(0, &idi48gpio->reg->irq);
+	ioread8(&idi48gpio->reg->irq);
 
 	return 0;
 }
@@ -273,8 +251,8 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
-	idi48gpio->base = devm_ioport_map(dev, base[id], IDI_48_EXTENT);
-	if (!idi48gpio->base)
+	idi48gpio->reg = devm_ioport_map(dev, base[id], IDI_48_EXTENT);
+	if (!idi48gpio->reg)
 		return -ENOMEM;
 
 	idi48gpio->chip.label = name;
@@ -298,8 +276,7 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 	girq->handler = handle_edge_irq;
 	girq->init_hw = idi_48_irq_init_hw;
 
-	raw_spin_lock_init(&idi48gpio->lock);
-	spin_lock_init(&idi48gpio->ack_lock);
+	spin_lock_init(&idi48gpio->lock);
 
 	err = devm_gpiochip_add_data(dev, &idi48gpio->chip, idi48gpio);
 	if (err) {
diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index 45f7ad8573e1..65a5f581d981 100644
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -6,7 +6,7 @@
  * This driver supports the following ACCES devices: 104-IDIO-16,
  * 104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, and 104-IDO-8.
  */
-#include <linux/bitops.h>
+#include <linux/bits.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/spinlock.h>
+#include <linux/types.h>
 
 #define IDIO_16_EXTENT 8
 #define MAX_NUM_IDIO_16 max_num_isa_dev(IDIO_16_EXTENT)
@@ -33,18 +34,41 @@ module_param_hw_array(irq, uint, irq, NULL, 0);
 MODULE_PARM_DESC(irq, "ACCES 104-IDIO-16 interrupt line numbers");
 
 /**
+ * struct idio_16_reg - device registers structure
+ * @out0_7:	Read: N/A
+ *		Write: FET Drive Outputs 0-7
+ * @in0_7:	Read: Isolated Inputs 0-7
+ *		Write: Clear Interrupt
+ * @irq_ctl:	Read: Enable IRQ
+ *		Write: Disable IRQ
+ * @unused:	N/A
+ * @out8_15:	Read: N/A
+ *		Write: FET Drive Outputs 8-15
+ * @in8_15:	Read: Isolated Inputs 8-15
+ *		Write: N/A
+ */
+struct idio_16_reg {
+	u8 out0_7;
+	u8 in0_7;
+	u8 irq_ctl;
+	u8 unused;
+	u8 out8_15;
+	u8 in8_15;
+};
+
+/**
  * struct idio_16_gpio - GPIO device private data structure
  * @chip:	instance of the gpio_chip
  * @lock:	synchronization lock to prevent I/O race conditions
  * @irq_mask:	I/O bits affected by interrupts
- * @base:	base port address of the GPIO device
+ * @reg:	I/O address offset for the device registers
  * @out_state:	output bits state
  */
 struct idio_16_gpio {
 	struct gpio_chip chip;
 	raw_spinlock_t lock;
 	unsigned long irq_mask;
-	void __iomem *base;
+	struct idio_16_reg __iomem *reg;
 	unsigned int out_state;
 };
 
@@ -79,9 +103,9 @@ static int idio_16_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return -EINVAL;
 
 	if (offset < 24)
-		return !!(ioread8(idio16gpio->base + 1) & mask);
+		return !!(ioread8(&idio16gpio->reg->in0_7) & mask);
 
-	return !!(ioread8(idio16gpio->base + 5) & (mask>>8));
+	return !!(ioread8(&idio16gpio->reg->in8_15) & (mask>>8));
 }
 
 static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
@@ -91,9 +115,9 @@ static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
 
 	*bits = 0;
 	if (*mask & GENMASK(23, 16))
-		*bits |= (unsigned long)ioread8(idio16gpio->base + 1) << 16;
+		*bits |= (unsigned long)ioread8(&idio16gpio->reg->in0_7) << 16;
 	if (*mask & GENMASK(31, 24))
-		*bits |= (unsigned long)ioread8(idio16gpio->base + 5) << 24;
+		*bits |= (unsigned long)ioread8(&idio16gpio->reg->in8_15) << 24;
 
 	return 0;
 }
@@ -116,9 +140,9 @@ static void idio_16_gpio_set(struct gpio_chip *chip, unsigned int offset,
 		idio16gpio->out_state &= ~mask;
 
 	if (offset > 7)
-		iowrite8(idio16gpio->out_state >> 8, idio16gpio->base + 4);
+		iowrite8(idio16gpio->out_state >> 8, &idio16gpio->reg->out8_15);
 	else
-		iowrite8(idio16gpio->out_state, idio16gpio->base);
+		iowrite8(idio16gpio->out_state, &idio16gpio->reg->out0_7);
 
 	raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 }
@@ -135,9 +159,9 @@ static void idio_16_gpio_set_multiple(struct gpio_chip *chip,
 	idio16gpio->out_state |= *mask & *bits;
 
 	if (*mask & 0xFF)
-		iowrite8(idio16gpio->out_state, idio16gpio->base);
+		iowrite8(idio16gpio->out_state, &idio16gpio->reg->out0_7);
 	if ((*mask >> 8) & 0xFF)
-		iowrite8(idio16gpio->out_state >> 8, idio16gpio->base + 4);
+		iowrite8(idio16gpio->out_state >> 8, &idio16gpio->reg->out8_15);
 
 	raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 }
@@ -158,7 +182,7 @@ static void idio_16_irq_mask(struct irq_data *data)
 	if (!idio16gpio->irq_mask) {
 		raw_spin_lock_irqsave(&idio16gpio->lock, flags);
 
-		iowrite8(0, idio16gpio->base + 2);
+		iowrite8(0, &idio16gpio->reg->irq_ctl);
 
 		raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 	}
@@ -177,7 +201,7 @@ static void idio_16_irq_unmask(struct irq_data *data)
 	if (!prev_irq_mask) {
 		raw_spin_lock_irqsave(&idio16gpio->lock, flags);
 
-		ioread8(idio16gpio->base + 2);
+		ioread8(&idio16gpio->reg->irq_ctl);
 
 		raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 	}
@@ -212,7 +236,7 @@ static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
 
 	raw_spin_lock(&idio16gpio->lock);
 
-	iowrite8(0, idio16gpio->base + 1);
+	iowrite8(0, &idio16gpio->reg->in0_7);
 
 	raw_spin_unlock(&idio16gpio->lock);
 
@@ -232,8 +256,8 @@ static int idio_16_irq_init_hw(struct gpio_chip *gc)
 	struct idio_16_gpio *const idio16gpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	iowrite8(0, idio16gpio->base + 2);
-	iowrite8(0, idio16gpio->base + 1);
+	iowrite8(0, &idio16gpio->reg->irq_ctl);
+	iowrite8(0, &idio16gpio->reg->in0_7);
 
 	return 0;
 }
@@ -255,8 +279,8 @@ static int idio_16_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
-	idio16gpio->base = devm_ioport_map(dev, base[id], IDIO_16_EXTENT);
-	if (!idio16gpio->base)
+	idio16gpio->reg = devm_ioport_map(dev, base[id], IDIO_16_EXTENT);
+	if (!idio16gpio->reg)
 		return -ENOMEM;
 
 	idio16gpio->chip.label = name;
diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c
index 173e06758e6c..0464f1ecd20d 100644
--- a/drivers/gpio/gpio-74xx-mmio.c
+++ b/drivers/gpio/gpio-74xx-mmio.c
@@ -5,15 +5,17 @@
  *  Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
  */
 
+#include <linux/bits.h>
 #include <linux/err.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/gpio/driver.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 
-#define MMIO_74XX_DIR_IN	(0 << 8)
-#define MMIO_74XX_DIR_OUT	(1 << 8)
-#define MMIO_74XX_BIT_CNT(x)	((x) & 0xff)
+#define MMIO_74XX_DIR_IN	BIT(8)
+#define MMIO_74XX_DIR_OUT	BIT(9)
+#define MMIO_74XX_BIT_CNT(x)	((x) & GENMASK(7, 0))
 
 struct mmio_74xx_gpio_priv {
 	struct gpio_chip	gc;
@@ -87,7 +89,10 @@ static int mmio_74xx_dir_in(struct gpio_chip *gc, unsigned int gpio)
 {
 	struct mmio_74xx_gpio_priv *priv = gpiochip_get_data(gc);
 
-	return (priv->flags & MMIO_74XX_DIR_OUT) ? -ENOTSUPP : 0;
+	if (priv->flags & MMIO_74XX_DIR_IN)
+		return 0;
+
+	return -ENOTSUPP;
 }
 
 static int mmio_74xx_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
@@ -112,7 +117,7 @@ static int mmio_74xx_gpio_probe(struct platform_device *pdev)
 	if (!priv)
 		return -ENOMEM;
 
-	priv->flags = (uintptr_t)of_device_get_match_data(&pdev->dev);
+	priv->flags = (uintptr_t)device_get_match_data(&pdev->dev);
 
 	dat = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(dat))
diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index cc349d4e4973..a6439e3daff0 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/drivers/gpio/gpio-adnp.c
@@ -6,8 +6,9 @@
 #include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_irq.h>
+#include <linux/property.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 
@@ -485,22 +486,17 @@ static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios,
 	return 0;
 }
 
-static int adnp_i2c_probe(struct i2c_client *client,
-				    const struct i2c_device_id *id)
+static int adnp_i2c_probe(struct i2c_client *client)
 {
-	struct device_node *np = client->dev.of_node;
+	struct device *dev = &client->dev;
 	struct adnp *adnp;
 	u32 num_gpios;
 	int err;
 
-	err = of_property_read_u32(np, "nr-gpios", &num_gpios);
+	err = device_property_read_u32(dev, "nr-gpios", &num_gpios);
 	if (err < 0)
 		return err;
 
-	client->irq = irq_of_parse_and_map(np, 0);
-	if (!client->irq)
-		return -EPROBE_DEFER;
-
 	adnp = devm_kzalloc(&client->dev, sizeof(*adnp), GFP_KERNEL);
 	if (!adnp)
 		return -ENOMEM;
@@ -508,8 +504,7 @@ static int adnp_i2c_probe(struct i2c_client *client,
 	mutex_init(&adnp->i2c_lock);
 	adnp->client = client;
 
-	err = adnp_gpio_setup(adnp, num_gpios,
-			of_property_read_bool(np, "interrupt-controller"));
+	err = adnp_gpio_setup(adnp, num_gpios, device_property_read_bool(dev, "interrupt-controller"));
 	if (err)
 		return err;
 
@@ -535,7 +530,7 @@ static struct i2c_driver adnp_i2c_driver = {
 		.name = "gpio-adnp",
 		.of_match_table = adnp_of_match,
 	},
-	.probe = adnp_i2c_probe,
+	.probe_new = adnp_i2c_probe,
 	.id_table = adnp_i2c_id,
 };
 module_i2c_driver(adnp_i2c_driver);
diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c
index e388e75103f4..d49f12560cde 100644
--- a/drivers/gpio/gpio-adp5588.c
+++ b/drivers/gpio/gpio-adp5588.c
@@ -6,20 +6,18 @@
  * Copyright 2009-2010 Analog Devices Inc.
  */
 
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
 #include <linux/gpio/driver.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
-#include <linux/of_device.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/slab.h>
 
 #include <linux/platform_data/adp5588.h>
 
-#define DRV_NAME	"adp5588-gpio"
-
 /*
  * Early pre 4.0 Silicon required to delay readout by at least 25ms,
  * since the Event Counter Register updated 25ms after the interrupt
@@ -422,23 +420,21 @@ static int adp5588_gpio_remove(struct i2c_client *client)
 }
 
 static const struct i2c_device_id adp5588_gpio_id[] = {
-	{DRV_NAME, 0},
+	{ "adp5588-gpio" },
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, adp5588_gpio_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id adp5588_gpio_of_id[] = {
-	{ .compatible = "adi," DRV_NAME, },
-	{},
+	{ .compatible = "adi,adp5588-gpio" },
+	{}
 };
 MODULE_DEVICE_TABLE(of, adp5588_gpio_of_id);
-#endif
 
 static struct i2c_driver adp5588_gpio_driver = {
 	.driver = {
-		.name = DRV_NAME,
-		.of_match_table = of_match_ptr(adp5588_gpio_of_id),
+		.name = "adp5588-gpio",
+		.of_match_table = adp5588_gpio_of_id,
 	},
 	.probe_new = adp5588_gpio_probe,
 	.remove = adp5588_gpio_remove,
diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index 85429dd6b3b6..c55b35da61a0 100644
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -375,12 +375,7 @@ static int brcmstb_gpio_remove(struct platform_device *pdev)
 {
 	struct brcmstb_gpio_priv *priv = platform_get_drvdata(pdev);
 	struct brcmstb_gpio_bank *bank;
-	int offset, ret = 0, virq;
-
-	if (!priv) {
-		dev_err(&pdev->dev, "called %s without drvdata!\n", __func__);
-		return -EFAULT;
-	}
+	int offset, virq;
 
 	if (priv->parent_irq > 0)
 		irq_set_chained_handler_and_data(priv->parent_irq, NULL, NULL);
@@ -401,7 +396,7 @@ static int brcmstb_gpio_remove(struct platform_device *pdev)
 	list_for_each_entry(bank, &priv->bank_list, node)
 		gpiochip_remove(&bank->gc);
 
-	return ret;
+	return 0;
 }
 
 static int brcmstb_gpio_of_xlate(struct gpio_chip *gc,
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index f960587f86a3..59c4c48d8296 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -22,6 +22,7 @@
 #include <linux/platform_data/gpio-davinci.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/spinlock.h>
+#include <linux/pm_runtime.h>
 
 #include <asm-generic/gpio.h>
 
@@ -62,6 +63,8 @@ struct davinci_gpio_controller {
 	void __iomem		*regs[MAX_REGS_BANKS];
 	int			gpio_unbanked;
 	int			irqs[MAX_INT_PER_BANK];
+	struct davinci_gpio_regs context[MAX_REGS_BANKS];
+	u32			binten_context;
 };
 
 static inline u32 __gpio_mask(unsigned gpio)
@@ -622,6 +625,85 @@ done:
 	return 0;
 }
 
+static void davinci_gpio_save_context(struct davinci_gpio_controller *chips,
+				      u32 nbank)
+{
+	struct davinci_gpio_regs __iomem *g;
+	struct davinci_gpio_regs *context;
+	u32 bank;
+	void __iomem *base;
+
+	base = chips->regs[0] - offset_array[0];
+	chips->binten_context = readl_relaxed(base + BINTEN);
+
+	for (bank = 0; bank < nbank; bank++) {
+		g = chips->regs[bank];
+		context = &chips->context[bank];
+		context->dir = readl_relaxed(&g->dir);
+		context->set_data = readl_relaxed(&g->set_data);
+		context->set_rising = readl_relaxed(&g->set_rising);
+		context->set_falling = readl_relaxed(&g->set_falling);
+	}
+
+	/* Clear Bank interrupt enable bit */
+	writel_relaxed(0, base + BINTEN);
+
+	/* Clear all interrupt status registers */
+	writel_relaxed(GENMASK(31, 0), &g->intstat);
+}
+
+static void davinci_gpio_restore_context(struct davinci_gpio_controller *chips,
+					 u32 nbank)
+{
+	struct davinci_gpio_regs __iomem *g;
+	struct davinci_gpio_regs *context;
+	u32 bank;
+	void __iomem *base;
+
+	base = chips->regs[0] - offset_array[0];
+
+	if (readl_relaxed(base + BINTEN) != chips->binten_context)
+		writel_relaxed(chips->binten_context, base + BINTEN);
+
+	for (bank = 0; bank < nbank; bank++) {
+		g = chips->regs[bank];
+		context = &chips->context[bank];
+		if (readl_relaxed(&g->dir) != context->dir)
+			writel_relaxed(context->dir, &g->dir);
+		if (readl_relaxed(&g->set_data) != context->set_data)
+			writel_relaxed(context->set_data, &g->set_data);
+		if (readl_relaxed(&g->set_rising) != context->set_rising)
+			writel_relaxed(context->set_rising, &g->set_rising);
+		if (readl_relaxed(&g->set_falling) != context->set_falling)
+			writel_relaxed(context->set_falling, &g->set_falling);
+	}
+}
+
+static int davinci_gpio_suspend(struct device *dev)
+{
+	struct davinci_gpio_controller *chips = dev_get_drvdata(dev);
+	struct davinci_gpio_platform_data *pdata = dev_get_platdata(dev);
+	u32 nbank = DIV_ROUND_UP(pdata->ngpio, 32);
+
+	davinci_gpio_save_context(chips, nbank);
+
+	return 0;
+}
+
+static int davinci_gpio_resume(struct device *dev)
+{
+	struct davinci_gpio_controller *chips = dev_get_drvdata(dev);
+	struct davinci_gpio_platform_data *pdata = dev_get_platdata(dev);
+	u32 nbank = DIV_ROUND_UP(pdata->ngpio, 32);
+
+	davinci_gpio_restore_context(chips, nbank);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_DEV_PM_OPS(davinci_gpio_dev_pm_ops, davinci_gpio_suspend,
+			 davinci_gpio_resume);
+
 static const struct of_device_id davinci_gpio_ids[] = {
 	{ .compatible = "ti,keystone-gpio", keystone_gpio_get_irq_chip},
 	{ .compatible = "ti,am654-gpio", keystone_gpio_get_irq_chip},
@@ -634,6 +716,7 @@ static struct platform_driver davinci_gpio_driver = {
 	.probe		= davinci_gpio_probe,
 	.driver		= {
 		.name		= "davinci_gpio",
+		.pm = pm_sleep_ptr(&davinci_gpio_dev_pm_ops),
 		.of_match_table	= of_match_ptr(davinci_gpio_ids),
 	},
 };
diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c
index 097a06463d01..2689671b6b01 100644
--- a/drivers/gpio/gpio-gpio-mm.c
+++ b/drivers/gpio/gpio-gpio-mm.c
@@ -6,8 +6,6 @@
  * This driver supports the following Diamond Systems devices: GPIO-MM and
  * GPIO-MM-12.
  */
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
@@ -17,7 +15,10 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/spinlock.h>
+
+#include "gpio-i8255.h"
+
+MODULE_IMPORT_NS(I8255);
 
 #define GPIOMM_EXTENT 8
 #define MAX_NUM_GPIOMM max_num_isa_dev(GPIOMM_EXTENT)
@@ -27,32 +28,26 @@ static unsigned int num_gpiomm;
 module_param_hw_array(base, uint, ioport, &num_gpiomm, 0);
 MODULE_PARM_DESC(base, "Diamond Systems GPIO-MM base addresses");
 
+#define GPIOMM_NUM_PPI 2
+
 /**
  * struct gpiomm_gpio - GPIO device private data structure
- * @chip:	instance of the gpio_chip
- * @io_state:	bit I/O state (whether bit is set to input or output)
- * @out_state:	output bits state
- * @control:	Control registers state
- * @lock:	synchronization lock to prevent I/O race conditions
- * @base:	base port address of the GPIO device
+ * @chip:		instance of the gpio_chip
+ * @ppi_state:		Programmable Peripheral Interface group states
+ * @ppi:		Programmable Peripheral Interface groups
  */
 struct gpiomm_gpio {
 	struct gpio_chip chip;
-	unsigned char io_state[6];
-	unsigned char out_state[6];
-	unsigned char control[2];
-	spinlock_t lock;
-	void __iomem *base;
+	struct i8255_state ppi_state[GPIOMM_NUM_PPI];
+	struct i8255 __iomem *ppi;
 };
 
 static int gpiomm_gpio_get_direction(struct gpio_chip *chip,
 	unsigned int offset)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
 
-	if (gpiommgpio->io_state[port] & mask)
+	if (i8255_get_direction(gpiommgpio->ppi_state, offset))
 		return GPIO_LINE_DIRECTION_IN;
 
 	return GPIO_LINE_DIRECTION_OUT;
@@ -62,35 +57,8 @@ static int gpiomm_gpio_direction_input(struct gpio_chip *chip,
 	unsigned int offset)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	const unsigned int io_port = offset / 8;
-	const unsigned int control_port = io_port / 3;
-	unsigned long flags;
-	unsigned int control;
-
-	spin_lock_irqsave(&gpiommgpio->lock, flags);
-
-	/* Check if configuring Port C */
-	if (io_port == 2 || io_port == 5) {
-		/* Port C can be configured by nibble */
-		if (offset % 8 > 3) {
-			gpiommgpio->io_state[io_port] |= 0xF0;
-			gpiommgpio->control[control_port] |= BIT(3);
-		} else {
-			gpiommgpio->io_state[io_port] |= 0x0F;
-			gpiommgpio->control[control_port] |= BIT(0);
-		}
-	} else {
-		gpiommgpio->io_state[io_port] |= 0xFF;
-		if (io_port == 0 || io_port == 3)
-			gpiommgpio->control[control_port] |= BIT(4);
-		else
-			gpiommgpio->control[control_port] |= BIT(1);
-	}
 
-	control = BIT(7) | gpiommgpio->control[control_port];
-	iowrite8(control, gpiommgpio->base + 3 + control_port*4);
-
-	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
+	i8255_direction_input(gpiommgpio->ppi, gpiommgpio->ppi_state, offset);
 
 	return 0;
 }
@@ -99,44 +67,9 @@ static int gpiomm_gpio_direction_output(struct gpio_chip *chip,
 	unsigned int offset, int value)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	const unsigned int io_port = offset / 8;
-	const unsigned int control_port = io_port / 3;
-	const unsigned int mask = BIT(offset % 8);
-	const unsigned int out_port = (io_port > 2) ? io_port + 1 : io_port;
-	unsigned long flags;
-	unsigned int control;
-
-	spin_lock_irqsave(&gpiommgpio->lock, flags);
-
-	/* Check if configuring Port C */
-	if (io_port == 2 || io_port == 5) {
-		/* Port C can be configured by nibble */
-		if (offset % 8 > 3) {
-			gpiommgpio->io_state[io_port] &= 0x0F;
-			gpiommgpio->control[control_port] &= ~BIT(3);
-		} else {
-			gpiommgpio->io_state[io_port] &= 0xF0;
-			gpiommgpio->control[control_port] &= ~BIT(0);
-		}
-	} else {
-		gpiommgpio->io_state[io_port] &= 0x00;
-		if (io_port == 0 || io_port == 3)
-			gpiommgpio->control[control_port] &= ~BIT(4);
-		else
-			gpiommgpio->control[control_port] &= ~BIT(1);
-	}
-
-	if (value)
-		gpiommgpio->out_state[io_port] |= mask;
-	else
-		gpiommgpio->out_state[io_port] &= ~mask;
-
-	control = BIT(7) | gpiommgpio->control[control_port];
-	iowrite8(control, gpiommgpio->base + 3 + control_port*4);
 
-	iowrite8(gpiommgpio->out_state[io_port], gpiommgpio->base + out_port);
-
-	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
+	i8255_direction_output(gpiommgpio->ppi, gpiommgpio->ppi_state, offset,
+			       value);
 
 	return 0;
 }
@@ -144,47 +77,16 @@ static int gpiomm_gpio_direction_output(struct gpio_chip *chip,
 static int gpiomm_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
-	const unsigned int in_port = (port > 2) ? port + 1 : port;
-	unsigned long flags;
-	unsigned int port_state;
-
-	spin_lock_irqsave(&gpiommgpio->lock, flags);
-
-	/* ensure that GPIO is set for input */
-	if (!(gpiommgpio->io_state[port] & mask)) {
-		spin_unlock_irqrestore(&gpiommgpio->lock, flags);
-		return -EINVAL;
-	}
-
-	port_state = ioread8(gpiommgpio->base + in_port);
-
-	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 
-	return !!(port_state & mask);
+	return i8255_get(gpiommgpio->ppi, offset);
 }
 
-static const size_t ports[] = { 0, 1, 2, 4, 5, 6 };
-
 static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	unsigned long *bits)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	unsigned long offset;
-	unsigned long gpio_mask;
-	void __iomem *port_addr;
-	unsigned long port_state;
-
-	/* clear bits array to a clean slate */
-	bitmap_zero(bits, chip->ngpio);
 
-	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
-		port_addr = gpiommgpio->base + ports[offset / 8];
-		port_state = ioread8(port_addr) & gpio_mask;
-
-		bitmap_set_value8(bits, port_state, offset);
-	}
+	i8255_get_multiple(gpiommgpio->ppi, mask, bits, chip->ngpio);
 
 	return 0;
 }
@@ -193,49 +95,17 @@ static void gpiomm_gpio_set(struct gpio_chip *chip, unsigned int offset,
 	int value)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	const unsigned int port = offset / 8;
-	const unsigned int mask = BIT(offset % 8);
-	const unsigned int out_port = (port > 2) ? port + 1 : port;
-	unsigned long flags;
-
-	spin_lock_irqsave(&gpiommgpio->lock, flags);
-
-	if (value)
-		gpiommgpio->out_state[port] |= mask;
-	else
-		gpiommgpio->out_state[port] &= ~mask;
-
-	iowrite8(gpiommgpio->out_state[port], gpiommgpio->base + out_port);
 
-	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
+	i8255_set(gpiommgpio->ppi, gpiommgpio->ppi_state, offset, value);
 }
 
 static void gpiomm_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long *mask, unsigned long *bits)
 {
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
-	unsigned long offset;
-	unsigned long gpio_mask;
-	size_t index;
-	void __iomem *port_addr;
-	unsigned long bitmask;
-	unsigned long flags;
-
-	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
-		index = offset / 8;
-		port_addr = gpiommgpio->base + ports[index];
-
-		bitmask = bitmap_get_value8(bits, offset) & gpio_mask;
-
-		spin_lock_irqsave(&gpiommgpio->lock, flags);
 
-		/* update output state data and set device gpio register */
-		gpiommgpio->out_state[index] &= ~gpio_mask;
-		gpiommgpio->out_state[index] |= bitmask;
-		iowrite8(gpiommgpio->out_state[index], port_addr);
-
-		spin_unlock_irqrestore(&gpiommgpio->lock, flags);
-	}
+	i8255_set_multiple(gpiommgpio->ppi, gpiommgpio->ppi_state, mask, bits,
+			   chip->ngpio);
 }
 
 #define GPIOMM_NGPIO 48
@@ -250,6 +120,21 @@ static const char *gpiomm_names[GPIOMM_NGPIO] = {
 	"Port 2C2", "Port 2C3", "Port 2C4", "Port 2C5", "Port 2C6", "Port 2C7",
 };
 
+static void gpiomm_init_dio(struct i8255 __iomem *const ppi,
+			    struct i8255_state *const ppi_state)
+{
+	const unsigned long ngpio = 24;
+	const unsigned long mask = GENMASK(ngpio - 1, 0);
+	const unsigned long bits = 0;
+	unsigned long i;
+
+	/* Initialize all GPIO to output 0 */
+	for (i = 0; i < GPIOMM_NUM_PPI; i++) {
+		i8255_mode0_output(&ppi[i]);
+		i8255_set_multiple(&ppi[i], &ppi_state[i], &mask, &bits, ngpio);
+	}
+}
+
 static int gpiomm_probe(struct device *dev, unsigned int id)
 {
 	struct gpiomm_gpio *gpiommgpio;
@@ -266,8 +151,8 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
-	gpiommgpio->base = devm_ioport_map(dev, base[id], GPIOMM_EXTENT);
-	if (!gpiommgpio->base)
+	gpiommgpio->ppi = devm_ioport_map(dev, base[id], GPIOMM_EXTENT);
+	if (!gpiommgpio->ppi)
 		return -ENOMEM;
 
 	gpiommgpio->chip.label = name;
@@ -284,7 +169,8 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 	gpiommgpio->chip.set = gpiomm_gpio_set;
 	gpiommgpio->chip.set_multiple = gpiomm_gpio_set_multiple;
 
-	spin_lock_init(&gpiommgpio->lock);
+	i8255_state_init(gpiommgpio->ppi_state, GPIOMM_NUM_PPI);
+	gpiomm_init_dio(gpiommgpio->ppi, gpiommgpio->ppi_state);
 
 	err = devm_gpiochip_add_data(dev, &gpiommgpio->chip, gpiommgpio);
 	if (err) {
@@ -292,16 +178,6 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 		return err;
 	}
 
-	/* initialize all GPIO as output */
-	iowrite8(0x80, gpiommgpio->base + 3);
-	iowrite8(0x00, gpiommgpio->base);
-	iowrite8(0x00, gpiommgpio->base + 1);
-	iowrite8(0x00, gpiommgpio->base + 2);
-	iowrite8(0x80, gpiommgpio->base + 7);
-	iowrite8(0x00, gpiommgpio->base + 4);
-	iowrite8(0x00, gpiommgpio->base + 5);
-	iowrite8(0x00, gpiommgpio->base + 6);
-
 	return 0;
 }
 
diff --git a/drivers/gpio/gpio-i8255.c b/drivers/gpio/gpio-i8255.c
new file mode 100644
index 000000000000..9b97db418df1
--- /dev/null
+++ b/drivers/gpio/gpio-i8255.c
@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel 8255 Programmable Peripheral Interface
+ * Copyright (C) 2022 William Breathitt Gray
+ */
+#include <linux/bitmap.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include "gpio-i8255.h"
+
+#define I8255_CONTROL_PORTC_LOWER_DIRECTION BIT(0)
+#define I8255_CONTROL_PORTB_DIRECTION BIT(1)
+#define I8255_CONTROL_PORTC_UPPER_DIRECTION BIT(3)
+#define I8255_CONTROL_PORTA_DIRECTION BIT(4)
+#define I8255_CONTROL_MODE_SET BIT(7)
+#define I8255_PORTA 0
+#define I8255_PORTB 1
+#define I8255_PORTC 2
+
+static int i8255_get_port(struct i8255 __iomem *const ppi,
+			  const unsigned long io_port, const unsigned long mask)
+{
+	const unsigned long bank = io_port / 3;
+	const unsigned long ppi_port = io_port % 3;
+
+	return ioread8(&ppi[bank].port[ppi_port]) & mask;
+}
+
+static u8 i8255_direction_mask(const unsigned long offset)
+{
+	const unsigned long port_offset = offset % 8;
+	const unsigned long io_port = offset / 8;
+	const unsigned long ppi_port = io_port % 3;
+
+	switch (ppi_port) {
+	case I8255_PORTA:
+		return I8255_CONTROL_PORTA_DIRECTION;
+	case I8255_PORTB:
+		return I8255_CONTROL_PORTB_DIRECTION;
+	case I8255_PORTC:
+		/* Port C can be configured by nibble */
+		if (port_offset >= 4)
+			return I8255_CONTROL_PORTC_UPPER_DIRECTION;
+		return I8255_CONTROL_PORTC_LOWER_DIRECTION;
+	default:
+		/* Should never reach this path */
+		return 0;
+	}
+}
+
+static void i8255_set_port(struct i8255 __iomem *const ppi,
+			   struct i8255_state *const state,
+			   const unsigned long io_port,
+			   const unsigned long mask, const unsigned long bits)
+{
+	const unsigned long bank = io_port / 3;
+	const unsigned long ppi_port = io_port % 3;
+	unsigned long flags;
+	unsigned long out_state;
+
+	spin_lock_irqsave(&state[bank].lock, flags);
+
+	out_state = ioread8(&ppi[bank].port[ppi_port]);
+	out_state = (out_state & ~mask) | (bits & mask);
+	iowrite8(out_state, &ppi[bank].port[ppi_port]);
+
+	spin_unlock_irqrestore(&state[bank].lock, flags);
+}
+
+/**
+ * i8255_direction_input - configure signal offset as input
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @state:	devices states of the respective PPI banks
+ * @offset:	signal offset to configure as input
+ *
+ * Configures a signal @offset as input for the respective Intel 8255
+ * Programmable Peripheral Interface (@ppi) banks. The @state control_state
+ * values are updated to reflect the new configuration.
+ */
+void i8255_direction_input(struct i8255 __iomem *const ppi,
+			   struct i8255_state *const state,
+			   const unsigned long offset)
+{
+	const unsigned long io_port = offset / 8;
+	const unsigned long bank = io_port / 3;
+	unsigned long flags;
+
+	spin_lock_irqsave(&state[bank].lock, flags);
+
+	state[bank].control_state |= I8255_CONTROL_MODE_SET;
+	state[bank].control_state |= i8255_direction_mask(offset);
+
+	iowrite8(state[bank].control_state, &ppi[bank].control);
+
+	spin_unlock_irqrestore(&state[bank].lock, flags);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_direction_input, I8255);
+
+/**
+ * i8255_direction_output - configure signal offset as output
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @state:	devices states of the respective PPI banks
+ * @offset:	signal offset to configure as output
+ * @value:	signal value to output
+ *
+ * Configures a signal @offset as output for the respective Intel 8255
+ * Programmable Peripheral Interface (@ppi) banks and sets the respective signal
+ * output to the desired @value. The @state control_state values are updated to
+ * reflect the new configuration.
+ */
+void i8255_direction_output(struct i8255 __iomem *const ppi,
+			    struct i8255_state *const state,
+			    const unsigned long offset,
+			    const unsigned long value)
+{
+	const unsigned long io_port = offset / 8;
+	const unsigned long bank = io_port / 3;
+	unsigned long flags;
+
+	spin_lock_irqsave(&state[bank].lock, flags);
+
+	state[bank].control_state |= I8255_CONTROL_MODE_SET;
+	state[bank].control_state &= ~i8255_direction_mask(offset);
+
+	iowrite8(state[bank].control_state, &ppi[bank].control);
+
+	spin_unlock_irqrestore(&state[bank].lock, flags);
+
+	i8255_set(ppi, state, offset, value);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_direction_output, I8255);
+
+/**
+ * i8255_get - get signal value at signal offset
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @offset:	offset of signal to get
+ *
+ * Returns the signal value (0=low, 1=high) for the signal at @offset for the
+ * respective Intel 8255 Programmable Peripheral Interface (@ppi) banks.
+ */
+int i8255_get(struct i8255 __iomem *const ppi, const unsigned long offset)
+{
+	const unsigned long io_port = offset / 8;
+	const unsigned long offset_mask = BIT(offset % 8);
+
+	return !!i8255_get_port(ppi, io_port, offset_mask);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_get, I8255);
+
+/**
+ * i8255_get_direction - get the I/O direction for a signal offset
+ * @state:	devices states of the respective PPI banks
+ * @offset:	offset of signal to get direction
+ *
+ * Returns the signal direction (0=output, 1=input) for the signal at @offset.
+ */
+int i8255_get_direction(const struct i8255_state *const state,
+			const unsigned long offset)
+{
+	const unsigned long io_port = offset / 8;
+	const unsigned long bank = io_port / 3;
+
+	return !!(state[bank].control_state & i8255_direction_mask(offset));
+}
+EXPORT_SYMBOL_NS_GPL(i8255_get_direction, I8255);
+
+/**
+ * i8255_get_multiple - get multiple signal values at multiple signal offsets
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @mask:	mask of signals to get
+ * @bits:	bitmap to store signal values
+ * @ngpio:	number of GPIO signals of the respective PPI banks
+ *
+ * Stores in @bits the values (0=low, 1=high) for the signals defined by @mask
+ * for the respective Intel 8255 Programmable Peripheral Interface (@ppi) banks.
+ */
+void i8255_get_multiple(struct i8255 __iomem *const ppi,
+			const unsigned long *const mask,
+			unsigned long *const bits, const unsigned long ngpio)
+{
+	unsigned long offset;
+	unsigned long port_mask;
+	unsigned long io_port;
+	unsigned long port_state;
+
+	bitmap_zero(bits, ngpio);
+
+	for_each_set_clump8(offset, port_mask, mask, ngpio) {
+		io_port = offset / 8;
+		port_state = i8255_get_port(ppi, io_port, port_mask);
+
+		bitmap_set_value8(bits, port_state, offset);
+	}
+}
+EXPORT_SYMBOL_NS_GPL(i8255_get_multiple, I8255);
+
+/**
+ * i8255_mode0_output - configure all PPI ports to MODE 0 output mode
+ * @ppi:	Intel 8255 Programmable Peripheral Interface bank
+ *
+ * Configures all Intel 8255 Programmable Peripheral Interface (@ppi) ports to
+ * MODE 0 (Basic Input/Output) output mode.
+ */
+void i8255_mode0_output(struct i8255 __iomem *const ppi)
+{
+	iowrite8(I8255_CONTROL_MODE_SET, &ppi->control);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_mode0_output, I8255);
+
+/**
+ * i8255_set - set signal value at signal offset
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @state:	devices states of the respective PPI banks
+ * @offset:	offset of signal to set
+ * @value:	value of signal to set
+ *
+ * Assigns output @value for the signal at @offset for the respective Intel 8255
+ * Programmable Peripheral Interface (@ppi) banks.
+ */
+void i8255_set(struct i8255 __iomem *const ppi, struct i8255_state *const state,
+	       const unsigned long offset, const unsigned long value)
+{
+	const unsigned long io_port = offset / 8;
+	const unsigned long port_offset = offset % 8;
+	const unsigned long mask = BIT(port_offset);
+	const unsigned long bits = value << port_offset;
+
+	i8255_set_port(ppi, state, io_port, mask, bits);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_set, I8255);
+
+/**
+ * i8255_set_multiple - set signal values at multiple signal offsets
+ * @ppi:	Intel 8255 Programmable Peripheral Interface banks
+ * @state:	devices states of the respective PPI banks
+ * @mask:	mask of signals to set
+ * @bits:	bitmap of signal output values
+ * @ngpio:	number of GPIO signals of the respective PPI banks
+ *
+ * Assigns output values defined by @bits for the signals defined by @mask for
+ * the respective Intel 8255 Programmable Peripheral Interface (@ppi) banks.
+ */
+void i8255_set_multiple(struct i8255 __iomem *const ppi,
+			struct i8255_state *const state,
+			const unsigned long *const mask,
+			const unsigned long *const bits,
+			const unsigned long ngpio)
+{
+	unsigned long offset;
+	unsigned long port_mask;
+	unsigned long io_port;
+	unsigned long value;
+
+	for_each_set_clump8(offset, port_mask, mask, ngpio) {
+		io_port = offset / 8;
+		value = bitmap_get_value8(bits, offset);
+		i8255_set_port(ppi, state, io_port, port_mask, value);
+	}
+}
+EXPORT_SYMBOL_NS_GPL(i8255_set_multiple, I8255);
+
+/**
+ * i8255_state_init - initialize i8255_state structure
+ * @state:	devices states of the respective PPI banks
+ * @nbanks:	number of Intel 8255 Programmable Peripheral Interface banks
+ *
+ * Initializes the @state of each Intel 8255 Programmable Peripheral Interface
+ * bank for use in i8255 library functions.
+ */
+void i8255_state_init(struct i8255_state *const state,
+		      const unsigned long nbanks)
+{
+	unsigned long bank;
+
+	for (bank = 0; bank < nbanks; bank++)
+		spin_lock_init(&state[bank].lock);
+}
+EXPORT_SYMBOL_NS_GPL(i8255_state_init, I8255);
+
+MODULE_AUTHOR("William Breathitt Gray");
+MODULE_DESCRIPTION("Intel 8255 Programmable Peripheral Interface");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-i8255.h b/drivers/gpio/gpio-i8255.h
new file mode 100644
index 000000000000..d9084aae9446
--- /dev/null
+++ b/drivers/gpio/gpio-i8255.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright 2022 William Breathitt Gray */
+#ifndef _I8255_H_
+#define _I8255_H_
+
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+/**
+ * struct i8255 - Intel 8255 register structure
+ * @port:	Port A, B, and C
+ * @control:	Control register
+ */
+struct i8255 {
+	u8 port[3];
+	u8 control;
+};
+
+/**
+ * struct i8255_state - Intel 8255 state structure
+ * @lock:		synchronization lock for accessing device state
+ * @control_state:	Control register state
+ */
+struct i8255_state {
+	spinlock_t lock;
+	u8 control_state;
+};
+
+void i8255_direction_input(struct i8255 __iomem *ppi, struct i8255_state *state,
+			   unsigned long offset);
+void i8255_direction_output(struct i8255 __iomem *ppi,
+			    struct i8255_state *state, unsigned long offset,
+			    unsigned long value);
+int i8255_get(struct i8255 __iomem *ppi, unsigned long offset);
+int i8255_get_direction(const struct i8255_state *state, unsigned long offset);
+void i8255_get_multiple(struct i8255 __iomem *ppi, const unsigned long *mask,
+			unsigned long *bits, unsigned long ngpio);
+void i8255_mode0_output(struct i8255 __iomem *const ppi);
+void i8255_set(struct i8255 __iomem *ppi, struct i8255_state *state,
+	       unsigned long offset, unsigned long value);
+void i8255_set_multiple(struct i8255 __iomem *ppi, struct i8255_state *state,
+			const unsigned long *mask, const unsigned long *bits,
+			unsigned long ngpio);
+void i8255_state_init(struct i8255_state *const state, unsigned long nbanks);
+
+#endif /* _I8255_H_ */
diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c
index 8a30fb185aab..79edd5db49d2 100644
--- a/drivers/gpio/gpio-lp3943.c
+++ b/drivers/gpio/gpio-lp3943.c
@@ -42,7 +42,7 @@ struct lp3943_gpio {
 	u16 input_mask;		/* 1 = GPIO is input direction, 0 = output */
 };
 
-static int lp3943_gpio_request(struct gpio_chip *chip, unsigned offset)
+static int lp3943_gpio_request(struct gpio_chip *chip, unsigned int offset)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 	struct lp3943 *lp3943 = lp3943_gpio->lp3943;
@@ -54,7 +54,7 @@ static int lp3943_gpio_request(struct gpio_chip *chip, unsigned offset)
 	return 0;
 }
 
-static void lp3943_gpio_free(struct gpio_chip *chip, unsigned offset)
+static void lp3943_gpio_free(struct gpio_chip *chip, unsigned int offset)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 	struct lp3943 *lp3943 = lp3943_gpio->lp3943;
@@ -72,7 +72,7 @@ static int lp3943_gpio_set_mode(struct lp3943_gpio *lp3943_gpio, u8 offset,
 				  val << mux[offset].shift);
 }
 
-static int lp3943_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+static int lp3943_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 
@@ -82,7 +82,7 @@ static int lp3943_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 }
 
 static int lp3943_get_gpio_in_status(struct lp3943_gpio *lp3943_gpio,
-				     struct gpio_chip *chip, unsigned offset)
+				     struct gpio_chip *chip, unsigned int offset)
 {
 	u8 addr, read;
 	int err;
@@ -107,7 +107,7 @@ static int lp3943_get_gpio_in_status(struct lp3943_gpio *lp3943_gpio,
 }
 
 static int lp3943_get_gpio_out_status(struct lp3943_gpio *lp3943_gpio,
-				      struct gpio_chip *chip, unsigned offset)
+				      struct gpio_chip *chip, unsigned int offset)
 {
 	struct lp3943 *lp3943 = lp3943_gpio->lp3943;
 	const struct lp3943_reg_cfg *mux = lp3943->mux_cfg;
@@ -128,7 +128,7 @@ static int lp3943_get_gpio_out_status(struct lp3943_gpio *lp3943_gpio,
 		return -EINVAL;
 }
 
-static int lp3943_gpio_get(struct gpio_chip *chip, unsigned offset)
+static int lp3943_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 
@@ -147,7 +147,7 @@ static int lp3943_gpio_get(struct gpio_chip *chip, unsigned offset)
 		return lp3943_get_gpio_out_status(lp3943_gpio, chip, offset);
 }
 
-static void lp3943_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static void lp3943_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 	u8 data;
@@ -160,7 +160,7 @@ static void lp3943_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	lp3943_gpio_set_mode(lp3943_gpio, offset, data);
 }
 
-static int lp3943_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+static int lp3943_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
 					int value)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
diff --git a/drivers/gpio/gpio-pca9570.c b/drivers/gpio/gpio-pca9570.c
index cb2b2f735c15..ab2a652964ec 100644
--- a/drivers/gpio/gpio-pca9570.c
+++ b/drivers/gpio/gpio-pca9570.c
@@ -121,12 +121,14 @@ static int pca9570_probe(struct i2c_client *client)
 
 static const struct i2c_device_id pca9570_id_table[] = {
 	{ "pca9570", 4 },
+	{ "pca9571", 8 },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(i2c, pca9570_id_table);
 
 static const struct of_device_id pca9570_of_match_table[] = {
 	{ .compatible = "nxp,pca9570", .data = (void *)4 },
+	{ .compatible = "nxp,pca9571", .data = (void *)8 },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, pca9570_of_match_table);
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index 3a0bd8795741..ee37ecb615cb 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -37,6 +37,11 @@ struct pch_regs {
 	u32	reset;
 };
 
+#define PCI_DEVICE_ID_INTEL_EG20T_PCH		0x8803
+#define PCI_DEVICE_ID_ROHM_ML7223m_IOH		0x8014
+#define PCI_DEVICE_ID_ROHM_ML7223n_IOH		0x8043
+#define PCI_DEVICE_ID_ROHM_EG20T_PCH		0x8803
+
 enum pch_type_t {
 	INTEL_EG20T_PCH,
 	OKISEMI_ML7223m_IOH, /* LAPIS Semiconductor ML7223 IOH PCIe Bus-m */
@@ -357,16 +362,12 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 
 	chip->dev = dev;
 	ret = pcim_enable_device(pdev);
-	if (ret) {
-		dev_err(dev, "pci_enable_device FAILED");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable PCI device\n");
 
 	ret = pcim_iomap_regions(pdev, BIT(1), KBUILD_MODNAME);
-	if (ret) {
-		dev_err(dev, "pci_request_regions FAILED-%d", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to request and map PCI regions\n");
 
 	chip->base = pcim_iomap_table(pdev)[1];
 	chip->ioh = id->driver_data;
@@ -376,10 +377,8 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 	pch_gpio_setup(chip);
 
 	ret = devm_gpiochip_add_data(dev, &chip->gpio, chip);
-	if (ret) {
-		dev_err(dev, "PCH gpio: Failed to register GPIO\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register GPIO\n");
 
 	irq_base = devm_irq_alloc_descs(dev, -1, 0,
 					gpio_pins[chip->ioh], NUMA_NO_NODE);
@@ -396,10 +395,8 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 
 	ret = devm_request_irq(dev, pdev->irq, pch_gpio_handler,
 			       IRQF_SHARED, KBUILD_MODNAME, chip);
-	if (ret) {
-		dev_err(dev, "request_irq failed\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to request IRQ\n");
 
 	return pch_gpio_alloc_generic_chip(chip, irq_base, gpio_pins[chip->ioh]);
 }
@@ -433,15 +430,11 @@ static int __maybe_unused pch_gpio_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(pch_gpio_pm_ops, pch_gpio_suspend, pch_gpio_resume);
 
 static const struct pci_device_id pch_gpio_pcidev_id[] = {
-	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803),
-	  .driver_data = INTEL_EG20T_PCH },
-	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014),
-	  .driver_data = OKISEMI_ML7223m_IOH },
-	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043),
-	  .driver_data = OKISEMI_ML7223n_IOH },
-	{ PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8803),
-	  .driver_data = INTEL_EG20T_PCH },
-	{ 0, }
+	{ PCI_DEVICE_DATA(INTEL, EG20T_PCH, INTEL_EG20T_PCH) },
+	{ PCI_DEVICE_DATA(ROHM, ML7223m_IOH, OKISEMI_ML7223m_IOH) },
+	{ PCI_DEVICE_DATA(ROHM, ML7223n_IOH, OKISEMI_ML7223n_IOH) },
+	{ PCI_DEVICE_DATA(ROHM, EG20T_PCH, INTEL_EG20T_PCH) },
+	{ }
 };
 MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id);
 
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index e342a6dc4c6c..f91e876fd969 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -27,6 +27,7 @@
 
 #define GPIO_TYPE_V1		(0)           /* GPIO Version ID reserved */
 #define GPIO_TYPE_V2		(0x01000C2B)  /* GPIO Version ID 0x01000C2B */
+#define GPIO_TYPE_V2_1		(0x0101157C)  /* GPIO Version ID 0x0101157C */
 
 static const struct rockchip_gpio_regs gpio_regs_v1 = {
 	.port_dr = 0x00,
@@ -664,7 +665,7 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
 	id = readl(bank->reg_base + gpio_regs_v2.version_id);
 
 	/* If not gpio v2, that is default to v1. */
-	if (id == GPIO_TYPE_V2) {
+	if (id == GPIO_TYPE_V2 || id == GPIO_TYPE_V2_1) {
 		bank->gpio_regs = &gpio_regs_v2;
 		bank->gpio_type = GPIO_TYPE_V2;
 		bank->db_clk = of_clk_get(bank->of_node, 1);
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index de249726230e..5046e51af8df 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -593,27 +593,13 @@ out:
 /* Cannot use as gpio_twl4030_probe() calls us */
 static int gpio_twl4030_remove(struct platform_device *pdev)
 {
-	struct twl4030_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev);
-	int status;
-
-	if (pdata && pdata->teardown) {
-		status = pdata->teardown(&pdev->dev, priv->gpio_chip.base,
-					 TWL4030_GPIO_MAX);
-		if (status) {
-			dev_dbg(&pdev->dev, "teardown --> %d\n", status);
-			return status;
-		}
-	}
 
 	gpiochip_remove(&priv->gpio_chip);
 
-	if (is_module())
-		return 0;
-
 	/* REVISIT no support yet for deregistering all the IRQs */
-	WARN_ON(1);
-	return -EIO;
+	WARN_ON(!is_module());
+	return 0;
 }
 
 static const struct of_device_id twl_gpio_match[] = {
diff --git a/drivers/gpio/gpio-ucb1400.c b/drivers/gpio/gpio-ucb1400.c
index d2a8644864c3..386e69300332 100644
--- a/drivers/gpio/gpio-ucb1400.c
+++ b/drivers/gpio/gpio-ucb1400.c
@@ -64,34 +64,14 @@ static int ucb1400_gpio_probe(struct platform_device *dev)
 	ucb->gc.can_sleep = true;
 
 	err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
-	if (err)
-		goto err;
-
-	if (ucb->gpio_setup)
-		err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
 
 err:
 	return err;
 
 }
 
-static int ucb1400_gpio_remove(struct platform_device *dev)
-{
-	int err = 0;
-	struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
-
-	if (ucb && ucb->gpio_teardown) {
-		err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
-		if (err)
-			return err;
-	}
-
-	return err;
-}
-
 static struct platform_driver ucb1400_gpio_driver = {
 	.probe	= ucb1400_gpio_probe,
-	.remove	= ucb1400_gpio_remove,
 	.driver	= {
 		.name	= "ucb1400_gpio"
 	},
diff --git a/drivers/gpio/gpio-vr41xx.c b/drivers/gpio/gpio-vr41xx.c
deleted file mode 100644
index 8d09b619c166..000000000000
--- a/drivers/gpio/gpio-vr41xx.c
+++ /dev/null
@@ -1,541 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- *  Driver for NEC VR4100 series General-purpose I/O Unit.
- *
- *  Copyright (C) 2002 MontaVista Software Inc.
- *	Author: Yoichi Yuasa <source@mvista.com>
- *  Copyright (C) 2003-2009  Yoichi Yuasa <yuasa@linux-mips.org>
- */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/gpio/driver.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-
-#include <asm/vr41xx/giu.h>
-#include <asm/vr41xx/irq.h>
-#include <asm/vr41xx/vr41xx.h>
-
-MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");
-MODULE_DESCRIPTION("NEC VR4100 series General-purpose I/O Unit driver");
-MODULE_LICENSE("GPL");
-
-#define GIUIOSELL	0x00
-#define GIUIOSELH	0x02
-#define GIUPIODL	0x04
-#define GIUPIODH	0x06
-#define GIUINTSTATL	0x08
-#define GIUINTSTATH	0x0a
-#define GIUINTENL	0x0c
-#define GIUINTENH	0x0e
-#define GIUINTTYPL	0x10
-#define GIUINTTYPH	0x12
-#define GIUINTALSELL	0x14
-#define GIUINTALSELH	0x16
-#define GIUINTHTSELL	0x18
-#define GIUINTHTSELH	0x1a
-#define GIUPODATL	0x1c
-#define GIUPODATEN	0x1c
-#define GIUPODATH	0x1e
- #define PIOEN0		0x0100
- #define PIOEN1		0x0200
-#define GIUPODAT	0x1e
-#define GIUFEDGEINHL	0x20
-#define GIUFEDGEINHH	0x22
-#define GIUREDGEINHL	0x24
-#define GIUREDGEINHH	0x26
-
-#define GIUUSEUPDN	0x1e0
-#define GIUTERMUPDN	0x1e2
-
-#define GPIO_HAS_PULLUPDOWN_IO		0x0001
-#define GPIO_HAS_OUTPUT_ENABLE		0x0002
-#define GPIO_HAS_INTERRUPT_EDGE_SELECT	0x0100
-
-enum {
-	GPIO_INPUT,
-	GPIO_OUTPUT,
-};
-
-static DEFINE_SPINLOCK(giu_lock);
-static unsigned long giu_flags;
-
-static void __iomem *giu_base;
-static struct gpio_chip vr41xx_gpio_chip;
-
-#define giu_read(offset)		readw(giu_base + (offset))
-#define giu_write(offset, value)	writew((value), giu_base + (offset))
-
-#define GPIO_PIN_OF_IRQ(irq)	((irq) - GIU_IRQ_BASE)
-#define GIUINT_HIGH_OFFSET	16
-#define GIUINT_HIGH_MAX		32
-
-static inline u16 giu_set(u16 offset, u16 set)
-{
-	u16 data;
-
-	data = giu_read(offset);
-	data |= set;
-	giu_write(offset, data);
-
-	return data;
-}
-
-static inline u16 giu_clear(u16 offset, u16 clear)
-{
-	u16 data;
-
-	data = giu_read(offset);
-	data &= ~clear;
-	giu_write(offset, data);
-
-	return data;
-}
-
-static void ack_giuint_low(struct irq_data *d)
-{
-	giu_write(GIUINTSTATL, 1 << GPIO_PIN_OF_IRQ(d->irq));
-}
-
-static void mask_giuint_low(struct irq_data *d)
-{
-	giu_clear(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(d->irq));
-}
-
-static void mask_ack_giuint_low(struct irq_data *d)
-{
-	unsigned int pin;
-
-	pin = GPIO_PIN_OF_IRQ(d->irq);
-	giu_clear(GIUINTENL, 1 << pin);
-	giu_write(GIUINTSTATL, 1 << pin);
-}
-
-static void unmask_giuint_low(struct irq_data *d)
-{
-	giu_set(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(d->irq));
-}
-
-static unsigned int startup_giuint(struct irq_data *data)
-{
-	int ret;
-
-	ret = gpiochip_lock_as_irq(&vr41xx_gpio_chip, irqd_to_hwirq(data));
-	if (ret) {
-		dev_err(vr41xx_gpio_chip.parent,
-			"unable to lock HW IRQ %lu for IRQ\n",
-			data->hwirq);
-		return ret;
-	}
-
-	/* Satisfy the .enable semantics by unmasking the line */
-	unmask_giuint_low(data);
-	return 0;
-}
-
-static void shutdown_giuint(struct irq_data *data)
-{
-	mask_giuint_low(data);
-	gpiochip_unlock_as_irq(&vr41xx_gpio_chip, data->hwirq);
-}
-
-static struct irq_chip giuint_low_irq_chip = {
-	.name		= "GIUINTL",
-	.irq_ack	= ack_giuint_low,
-	.irq_mask	= mask_giuint_low,
-	.irq_mask_ack	= mask_ack_giuint_low,
-	.irq_unmask	= unmask_giuint_low,
-	.irq_startup	= startup_giuint,
-	.irq_shutdown	= shutdown_giuint,
-};
-
-static void ack_giuint_high(struct irq_data *d)
-{
-	giu_write(GIUINTSTATH,
-		  1 << (GPIO_PIN_OF_IRQ(d->irq) - GIUINT_HIGH_OFFSET));
-}
-
-static void mask_giuint_high(struct irq_data *d)
-{
-	giu_clear(GIUINTENH, 1 << (GPIO_PIN_OF_IRQ(d->irq) - GIUINT_HIGH_OFFSET));
-}
-
-static void mask_ack_giuint_high(struct irq_data *d)
-{
-	unsigned int pin;
-
-	pin = GPIO_PIN_OF_IRQ(d->irq) - GIUINT_HIGH_OFFSET;
-	giu_clear(GIUINTENH, 1 << pin);
-	giu_write(GIUINTSTATH, 1 << pin);
-}
-
-static void unmask_giuint_high(struct irq_data *d)
-{
-	giu_set(GIUINTENH, 1 << (GPIO_PIN_OF_IRQ(d->irq) - GIUINT_HIGH_OFFSET));
-}
-
-static struct irq_chip giuint_high_irq_chip = {
-	.name		= "GIUINTH",
-	.irq_ack	= ack_giuint_high,
-	.irq_mask	= mask_giuint_high,
-	.irq_mask_ack	= mask_ack_giuint_high,
-	.irq_unmask	= unmask_giuint_high,
-};
-
-static int giu_get_irq(unsigned int irq)
-{
-	u16 pendl, pendh, maskl, maskh;
-	int i;
-
-	pendl = giu_read(GIUINTSTATL);
-	pendh = giu_read(GIUINTSTATH);
-	maskl = giu_read(GIUINTENL);
-	maskh = giu_read(GIUINTENH);
-
-	maskl &= pendl;
-	maskh &= pendh;
-
-	if (maskl) {
-		for (i = 0; i < 16; i++) {
-			if (maskl & (1 << i))
-				return GIU_IRQ(i);
-		}
-	} else if (maskh) {
-		for (i = 0; i < 16; i++) {
-			if (maskh & (1 << i))
-				return GIU_IRQ(i + GIUINT_HIGH_OFFSET);
-		}
-	}
-
-	printk(KERN_ERR "spurious GIU interrupt: %04x(%04x),%04x(%04x)\n",
-	       maskl, pendl, maskh, pendh);
-
-	return -EINVAL;
-}
-
-void vr41xx_set_irq_trigger(unsigned int pin, irq_trigger_t trigger,
-			    irq_signal_t signal)
-{
-	u16 mask;
-
-	if (pin < GIUINT_HIGH_OFFSET) {
-		mask = 1 << pin;
-		if (trigger != IRQ_TRIGGER_LEVEL) {
-			giu_set(GIUINTTYPL, mask);
-			if (signal == IRQ_SIGNAL_HOLD)
-				giu_set(GIUINTHTSELL, mask);
-			else
-				giu_clear(GIUINTHTSELL, mask);
-			if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
-				switch (trigger) {
-				case IRQ_TRIGGER_EDGE_FALLING:
-					giu_set(GIUFEDGEINHL, mask);
-					giu_clear(GIUREDGEINHL, mask);
-					break;
-				case IRQ_TRIGGER_EDGE_RISING:
-					giu_clear(GIUFEDGEINHL, mask);
-					giu_set(GIUREDGEINHL, mask);
-					break;
-				default:
-					giu_set(GIUFEDGEINHL, mask);
-					giu_set(GIUREDGEINHL, mask);
-					break;
-				}
-			}
-			irq_set_chip_and_handler(GIU_IRQ(pin),
-						 &giuint_low_irq_chip,
-						 handle_edge_irq);
-		} else {
-			giu_clear(GIUINTTYPL, mask);
-			giu_clear(GIUINTHTSELL, mask);
-			irq_set_chip_and_handler(GIU_IRQ(pin),
-						 &giuint_low_irq_chip,
-						 handle_level_irq);
-		}
-		giu_write(GIUINTSTATL, mask);
-	} else if (pin < GIUINT_HIGH_MAX) {
-		mask = 1 << (pin - GIUINT_HIGH_OFFSET);
-		if (trigger != IRQ_TRIGGER_LEVEL) {
-			giu_set(GIUINTTYPH, mask);
-			if (signal == IRQ_SIGNAL_HOLD)
-				giu_set(GIUINTHTSELH, mask);
-			else
-				giu_clear(GIUINTHTSELH, mask);
-			if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
-				switch (trigger) {
-				case IRQ_TRIGGER_EDGE_FALLING:
-					giu_set(GIUFEDGEINHH, mask);
-					giu_clear(GIUREDGEINHH, mask);
-					break;
-				case IRQ_TRIGGER_EDGE_RISING:
-					giu_clear(GIUFEDGEINHH, mask);
-					giu_set(GIUREDGEINHH, mask);
-					break;
-				default:
-					giu_set(GIUFEDGEINHH, mask);
-					giu_set(GIUREDGEINHH, mask);
-					break;
-				}
-			}
-			irq_set_chip_and_handler(GIU_IRQ(pin),
-						 &giuint_high_irq_chip,
-						 handle_edge_irq);
-		} else {
-			giu_clear(GIUINTTYPH, mask);
-			giu_clear(GIUINTHTSELH, mask);
-			irq_set_chip_and_handler(GIU_IRQ(pin),
-						 &giuint_high_irq_chip,
-						 handle_level_irq);
-		}
-		giu_write(GIUINTSTATH, mask);
-	}
-}
-EXPORT_SYMBOL_GPL(vr41xx_set_irq_trigger);
-
-void vr41xx_set_irq_level(unsigned int pin, irq_level_t level)
-{
-	u16 mask;
-
-	if (pin < GIUINT_HIGH_OFFSET) {
-		mask = 1 << pin;
-		if (level == IRQ_LEVEL_HIGH)
-			giu_set(GIUINTALSELL, mask);
-		else
-			giu_clear(GIUINTALSELL, mask);
-		giu_write(GIUINTSTATL, mask);
-	} else if (pin < GIUINT_HIGH_MAX) {
-		mask = 1 << (pin - GIUINT_HIGH_OFFSET);
-		if (level == IRQ_LEVEL_HIGH)
-			giu_set(GIUINTALSELH, mask);
-		else
-			giu_clear(GIUINTALSELH, mask);
-		giu_write(GIUINTSTATH, mask);
-	}
-}
-EXPORT_SYMBOL_GPL(vr41xx_set_irq_level);
-
-static int giu_set_direction(struct gpio_chip *chip, unsigned pin, int dir)
-{
-	u16 offset, mask, reg;
-	unsigned long flags;
-
-	if (pin >= chip->ngpio)
-		return -EINVAL;
-
-	if (pin < 16) {
-		offset = GIUIOSELL;
-		mask = 1 << pin;
-	} else if (pin < 32) {
-		offset = GIUIOSELH;
-		mask = 1 << (pin - 16);
-	} else {
-		if (giu_flags & GPIO_HAS_OUTPUT_ENABLE) {
-			offset = GIUPODATEN;
-			mask = 1 << (pin - 32);
-		} else {
-			switch (pin) {
-			case 48:
-				offset = GIUPODATH;
-				mask = PIOEN0;
-				break;
-			case 49:
-				offset = GIUPODATH;
-				mask = PIOEN1;
-				break;
-			default:
-				return -EINVAL;
-			}
-		}
-	}
-
-	spin_lock_irqsave(&giu_lock, flags);
-
-	reg = giu_read(offset);
-	if (dir == GPIO_OUTPUT)
-		reg |= mask;
-	else
-		reg &= ~mask;
-	giu_write(offset, reg);
-
-	spin_unlock_irqrestore(&giu_lock, flags);
-
-	return 0;
-}
-
-static int vr41xx_gpio_get(struct gpio_chip *chip, unsigned pin)
-{
-	u16 reg, mask;
-
-	if (pin >= chip->ngpio)
-		return -EINVAL;
-
-	if (pin < 16) {
-		reg = giu_read(GIUPIODL);
-		mask = 1 << pin;
-	} else if (pin < 32) {
-		reg = giu_read(GIUPIODH);
-		mask = 1 << (pin - 16);
-	} else if (pin < 48) {
-		reg = giu_read(GIUPODATL);
-		mask = 1 << (pin - 32);
-	} else {
-		reg = giu_read(GIUPODATH);
-		mask = 1 << (pin - 48);
-	}
-
-	if (reg & mask)
-		return 1;
-
-	return 0;
-}
-
-static void vr41xx_gpio_set(struct gpio_chip *chip, unsigned pin,
-			    int value)
-{
-	u16 offset, mask, reg;
-	unsigned long flags;
-
-	if (pin >= chip->ngpio)
-		return;
-
-	if (pin < 16) {
-		offset = GIUPIODL;
-		mask = 1 << pin;
-	} else if (pin < 32) {
-		offset = GIUPIODH;
-		mask = 1 << (pin - 16);
-	} else if (pin < 48) {
-		offset = GIUPODATL;
-		mask = 1 << (pin - 32);
-	} else {
-		offset = GIUPODATH;
-		mask = 1 << (pin - 48);
-	}
-
-	spin_lock_irqsave(&giu_lock, flags);
-
-	reg = giu_read(offset);
-	if (value)
-		reg |= mask;
-	else
-		reg &= ~mask;
-	giu_write(offset, reg);
-
-	spin_unlock_irqrestore(&giu_lock, flags);
-}
-
-
-static int vr41xx_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	return giu_set_direction(chip, offset, GPIO_INPUT);
-}
-
-static int vr41xx_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
-				int value)
-{
-	vr41xx_gpio_set(chip, offset, value);
-
-	return giu_set_direction(chip, offset, GPIO_OUTPUT);
-}
-
-static int vr41xx_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	if (offset >= chip->ngpio)
-		return -EINVAL;
-
-	return GIU_IRQ_BASE + offset;
-}
-
-static struct gpio_chip vr41xx_gpio_chip = {
-	.label			= "vr41xx",
-	.owner			= THIS_MODULE,
-	.direction_input	= vr41xx_gpio_direction_input,
-	.get			= vr41xx_gpio_get,
-	.direction_output	= vr41xx_gpio_direction_output,
-	.set			= vr41xx_gpio_set,
-	.to_irq			= vr41xx_gpio_to_irq,
-};
-
-static int giu_probe(struct platform_device *pdev)
-{
-	unsigned int trigger, i, pin;
-	struct irq_chip *chip;
-	int irq;
-
-	switch (pdev->id) {
-	case GPIO_50PINS_PULLUPDOWN:
-		giu_flags = GPIO_HAS_PULLUPDOWN_IO;
-		vr41xx_gpio_chip.ngpio = 50;
-		break;
-	case GPIO_36PINS:
-		vr41xx_gpio_chip.ngpio = 36;
-		break;
-	case GPIO_48PINS_EDGE_SELECT:
-		giu_flags = GPIO_HAS_INTERRUPT_EDGE_SELECT;
-		vr41xx_gpio_chip.ngpio = 48;
-		break;
-	default:
-		dev_err(&pdev->dev, "GIU: unknown ID %d\n", pdev->id);
-		return -ENODEV;
-	}
-
-	giu_base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(giu_base))
-		return PTR_ERR(giu_base);
-
-	vr41xx_gpio_chip.parent = &pdev->dev;
-
-	if (gpiochip_add_data(&vr41xx_gpio_chip, NULL))
-		return -ENODEV;
-
-	giu_write(GIUINTENL, 0);
-	giu_write(GIUINTENH, 0);
-
-	trigger = giu_read(GIUINTTYPH) << 16;
-	trigger |= giu_read(GIUINTTYPL);
-	for (i = GIU_IRQ_BASE; i <= GIU_IRQ_LAST; i++) {
-		pin = GPIO_PIN_OF_IRQ(i);
-		if (pin < GIUINT_HIGH_OFFSET)
-			chip = &giuint_low_irq_chip;
-		else
-			chip = &giuint_high_irq_chip;
-
-		if (trigger & (1 << pin))
-			irq_set_chip_and_handler(i, chip, handle_edge_irq);
-		else
-			irq_set_chip_and_handler(i, chip, handle_level_irq);
-
-	}
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0 || irq >= nr_irqs)
-		return -EBUSY;
-
-	return cascade_irq(irq, giu_get_irq);
-}
-
-static int giu_remove(struct platform_device *pdev)
-{
-	if (giu_base) {
-		giu_base = NULL;
-	}
-
-	return 0;
-}
-
-static struct platform_driver giu_device_driver = {
-	.probe		= giu_probe,
-	.remove		= giu_remove,
-	.driver		= {
-		.name	= "GIU",
-	},
-};
-
-module_platform_driver(giu_device_driver);
diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c
index 5078631d8014..b098f2dc196b 100644
--- a/drivers/gpio/gpio-ws16c48.c
+++ b/drivers/gpio/gpio-ws16c48.c
@@ -4,7 +4,6 @@
  * Copyright (C) 2016 William Breathitt Gray
  */
 #include <linux/bitmap.h>
-#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/gpio/driver.h>
@@ -17,8 +16,9 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/spinlock.h>
+#include <linux/types.h>
 
-#define WS16C48_EXTENT 16
+#define WS16C48_EXTENT 10
 #define MAX_NUM_WS16C48 max_num_isa_dev(WS16C48_EXTENT)
 
 static unsigned int base[MAX_NUM_WS16C48];
@@ -31,6 +31,20 @@ module_param_hw_array(irq, uint, irq, NULL, 0);
 MODULE_PARM_DESC(irq, "WinSystems WS16C48 interrupt line numbers");
 
 /**
+ * struct ws16c48_reg - device register structure
+ * @port:		Port 0 through 5 I/O
+ * @int_pending:	Interrupt Pending
+ * @page_lock:		Register page (Bits 7-6) and I/O port lock (Bits 5-0)
+ * @pol_enab_int_id:	Interrupt polarity, enable, and ID
+ */
+struct ws16c48_reg {
+	u8 port[6];
+	u8 int_pending;
+	u8 page_lock;
+	u8 pol_enab_int_id[3];
+};
+
+/**
  * struct ws16c48_gpio - GPIO device private data structure
  * @chip:	instance of the gpio_chip
  * @io_state:	bit I/O state (whether bit is set to input or output)
@@ -38,7 +52,7 @@ MODULE_PARM_DESC(irq, "WinSystems WS16C48 interrupt line numbers");
  * @lock:	synchronization lock to prevent I/O race conditions
  * @irq_mask:	I/O bits affected by interrupts
  * @flow_mask:	IRQ flow type mask for the respective I/O bits
- * @base:	base port address of the GPIO device
+ * @reg:	I/O address offset for the device registers
  */
 struct ws16c48_gpio {
 	struct gpio_chip chip;
@@ -47,7 +61,7 @@ struct ws16c48_gpio {
 	raw_spinlock_t lock;
 	unsigned long irq_mask;
 	unsigned long flow_mask;
-	void __iomem *base;
+	struct ws16c48_reg __iomem *reg;
 };
 
 static int ws16c48_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
@@ -73,7 +87,7 @@ static int ws16c48_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 
 	ws16c48gpio->io_state[port] |= mask;
 	ws16c48gpio->out_state[port] &= ~mask;
-	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->reg->port + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -95,7 +109,7 @@ static int ws16c48_gpio_direction_output(struct gpio_chip *chip,
 		ws16c48gpio->out_state[port] |= mask;
 	else
 		ws16c48gpio->out_state[port] &= ~mask;
-	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->reg->port + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -118,7 +132,7 @@ static int ws16c48_gpio_get(struct gpio_chip *chip, unsigned offset)
 		return -EINVAL;
 	}
 
-	port_state = ioread8(ws16c48gpio->base + port);
+	port_state = ioread8(ws16c48gpio->reg->port + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -131,14 +145,16 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip,
 	struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(chip);
 	unsigned long offset;
 	unsigned long gpio_mask;
-	void __iomem *port_addr;
+	size_t index;
+	u8 __iomem *port_addr;
 	unsigned long port_state;
 
 	/* clear bits array to a clean slate */
 	bitmap_zero(bits, chip->ngpio);
 
 	for_each_set_clump8(offset, gpio_mask, mask, chip->ngpio) {
-		port_addr = ws16c48gpio->base + offset / 8;
+		index = offset / 8;
+		port_addr = ws16c48gpio->reg->port + index;
 		port_state = ioread8(port_addr) & gpio_mask;
 
 		bitmap_set_value8(bits, port_state, offset);
@@ -166,7 +182,7 @@ static void ws16c48_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 		ws16c48gpio->out_state[port] |= mask;
 	else
 		ws16c48gpio->out_state[port] &= ~mask;
-	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->reg->port + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -178,13 +194,13 @@ static void ws16c48_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long offset;
 	unsigned long gpio_mask;
 	size_t index;
-	void __iomem *port_addr;
+	u8 __iomem *port_addr;
 	unsigned long bitmask;
 	unsigned long flags;
 
 	for_each_set_clump8(offset, gpio_mask, mask, chip->ngpio) {
 		index = offset / 8;
-		port_addr = ws16c48gpio->base + index;
+		port_addr = ws16c48gpio->reg->port + index;
 
 		/* mask out GPIO configured for input */
 		gpio_mask &= ~ws16c48gpio->io_state[index];
@@ -219,10 +235,15 @@ static void ws16c48_irq_ack(struct irq_data *data)
 
 	port_state = ws16c48gpio->irq_mask >> (8*port);
 
-	iowrite8(0x80, ws16c48gpio->base + 7);
-	iowrite8(port_state & ~mask, ws16c48gpio->base + 8 + port);
-	iowrite8(port_state | mask, ws16c48gpio->base + 8 + port);
-	iowrite8(0xC0, ws16c48gpio->base + 7);
+	/* Select Register Page 2; Unlock all I/O ports */
+	iowrite8(0x80, &ws16c48gpio->reg->page_lock);
+
+	/* Clear pending interrupt */
+	iowrite8(port_state & ~mask, ws16c48gpio->reg->pol_enab_int_id + port);
+	iowrite8(port_state | mask, ws16c48gpio->reg->pol_enab_int_id + port);
+
+	/* Select Register Page 3; Unlock all I/O ports */
+	iowrite8(0xC0, &ws16c48gpio->reg->page_lock);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -235,6 +256,7 @@ static void ws16c48_irq_mask(struct irq_data *data)
 	const unsigned long mask = BIT(offset);
 	const unsigned port = offset / 8;
 	unsigned long flags;
+	unsigned long port_state;
 
 	/* only the first 3 ports support interrupts */
 	if (port > 2)
@@ -243,10 +265,16 @@ static void ws16c48_irq_mask(struct irq_data *data)
 	raw_spin_lock_irqsave(&ws16c48gpio->lock, flags);
 
 	ws16c48gpio->irq_mask &= ~mask;
+	port_state = ws16c48gpio->irq_mask >> (8 * port);
+
+	/* Select Register Page 2; Unlock all I/O ports */
+	iowrite8(0x80, &ws16c48gpio->reg->page_lock);
 
-	iowrite8(0x80, ws16c48gpio->base + 7);
-	iowrite8(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	iowrite8(0xC0, ws16c48gpio->base + 7);
+	/* Disable interrupt */
+	iowrite8(port_state, ws16c48gpio->reg->pol_enab_int_id + port);
+
+	/* Select Register Page 3; Unlock all I/O ports */
+	iowrite8(0xC0, &ws16c48gpio->reg->page_lock);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -259,6 +287,7 @@ static void ws16c48_irq_unmask(struct irq_data *data)
 	const unsigned long mask = BIT(offset);
 	const unsigned port = offset / 8;
 	unsigned long flags;
+	unsigned long port_state;
 
 	/* only the first 3 ports support interrupts */
 	if (port > 2)
@@ -267,10 +296,16 @@ static void ws16c48_irq_unmask(struct irq_data *data)
 	raw_spin_lock_irqsave(&ws16c48gpio->lock, flags);
 
 	ws16c48gpio->irq_mask |= mask;
+	port_state = ws16c48gpio->irq_mask >> (8 * port);
+
+	/* Select Register Page 2; Unlock all I/O ports */
+	iowrite8(0x80, &ws16c48gpio->reg->page_lock);
 
-	iowrite8(0x80, ws16c48gpio->base + 7);
-	iowrite8(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	iowrite8(0xC0, ws16c48gpio->base + 7);
+	/* Enable interrupt */
+	iowrite8(port_state, ws16c48gpio->reg->pol_enab_int_id + port);
+
+	/* Select Register Page 3; Unlock all I/O ports */
+	iowrite8(0xC0, &ws16c48gpio->reg->page_lock);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -283,6 +318,7 @@ static int ws16c48_irq_set_type(struct irq_data *data, unsigned flow_type)
 	const unsigned long mask = BIT(offset);
 	const unsigned port = offset / 8;
 	unsigned long flags;
+	unsigned long port_state;
 
 	/* only the first 3 ports support interrupts */
 	if (port > 2)
@@ -304,9 +340,16 @@ static int ws16c48_irq_set_type(struct irq_data *data, unsigned flow_type)
 		return -EINVAL;
 	}
 
-	iowrite8(0x40, ws16c48gpio->base + 7);
-	iowrite8(ws16c48gpio->flow_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	iowrite8(0xC0, ws16c48gpio->base + 7);
+	port_state = ws16c48gpio->flow_mask >> (8 * port);
+
+	/* Select Register Page 1; Unlock all I/O ports */
+	iowrite8(0x40, &ws16c48gpio->reg->page_lock);
+
+	/* Set interrupt polarity */
+	iowrite8(port_state, ws16c48gpio->reg->pol_enab_int_id + port);
+
+	/* Select Register Page 3; Unlock all I/O ports */
+	iowrite8(0xC0, &ws16c48gpio->reg->page_lock);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -325,25 +368,26 @@ static irqreturn_t ws16c48_irq_handler(int irq, void *dev_id)
 {
 	struct ws16c48_gpio *const ws16c48gpio = dev_id;
 	struct gpio_chip *const chip = &ws16c48gpio->chip;
+	struct ws16c48_reg __iomem *const reg = ws16c48gpio->reg;
 	unsigned long int_pending;
 	unsigned long port;
 	unsigned long int_id;
 	unsigned long gpio;
 
-	int_pending = ioread8(ws16c48gpio->base + 6) & 0x7;
+	int_pending = ioread8(&reg->int_pending) & 0x7;
 	if (!int_pending)
 		return IRQ_NONE;
 
 	/* loop until all pending interrupts are handled */
 	do {
 		for_each_set_bit(port, &int_pending, 3) {
-			int_id = ioread8(ws16c48gpio->base + 8 + port);
+			int_id = ioread8(reg->pol_enab_int_id + port);
 			for_each_set_bit(gpio, &int_id, 8)
 				generic_handle_domain_irq(chip->irq.domain,
 							  gpio + 8*port);
 		}
 
-		int_pending = ioread8(ws16c48gpio->base + 6) & 0x7;
+		int_pending = ioread8(&reg->int_pending) & 0x7;
 	} while (int_pending);
 
 	return IRQ_HANDLED;
@@ -369,12 +413,16 @@ static int ws16c48_irq_init_hw(struct gpio_chip *gc)
 {
 	struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(gc);
 
-	/* Disable IRQ by default */
-	iowrite8(0x80, ws16c48gpio->base + 7);
-	iowrite8(0, ws16c48gpio->base + 8);
-	iowrite8(0, ws16c48gpio->base + 9);
-	iowrite8(0, ws16c48gpio->base + 10);
-	iowrite8(0xC0, ws16c48gpio->base + 7);
+	/* Select Register Page 2; Unlock all I/O ports */
+	iowrite8(0x80, &ws16c48gpio->reg->page_lock);
+
+	/* Disable interrupts for all lines */
+	iowrite8(0, &ws16c48gpio->reg->pol_enab_int_id[0]);
+	iowrite8(0, &ws16c48gpio->reg->pol_enab_int_id[1]);
+	iowrite8(0, &ws16c48gpio->reg->pol_enab_int_id[2]);
+
+	/* Select Register Page 3; Unlock all I/O ports */
+	iowrite8(0xC0, &ws16c48gpio->reg->page_lock);
 
 	return 0;
 }
@@ -396,8 +444,8 @@ static int ws16c48_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
-	ws16c48gpio->base = devm_ioport_map(dev, base[id], WS16C48_EXTENT);
-	if (!ws16c48gpio->base)
+	ws16c48gpio->reg = devm_ioport_map(dev, base[id], WS16C48_EXTENT);
+	if (!ws16c48gpio->reg)
 		return -ENOMEM;
 
 	ws16c48gpio->chip.label = name;
diff --git a/drivers/gpio/gpio-xgs-iproc.c b/drivers/gpio/gpio-xgs-iproc.c
index 43ca52fa6f9a..fd88500399c6 100644
--- a/drivers/gpio/gpio-xgs-iproc.c
+++ b/drivers/gpio/gpio-xgs-iproc.c
@@ -281,11 +281,7 @@ static int iproc_gpio_probe(struct platform_device *pdev)
 
 static int iproc_gpio_remove(struct platform_device *pdev)
 {
-	struct iproc_gpio_chip *chip;
-
-	chip = platform_get_drvdata(pdev);
-	if (!chip)
-		return -ENODEV;
+	struct iproc_gpio_chip *chip = platform_get_drvdata(pdev);
 
 	if (chip->intr) {
 		u32 val;
diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 7f8e2fed2988..2fc6b6ff7f16 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -117,12 +117,14 @@ static inline int xgpio_regoffset(struct xgpio_instance *chip, int ch)
 static void xgpio_read_ch(struct xgpio_instance *chip, int reg, int bit, unsigned long *a)
 {
 	void __iomem *addr = chip->regs + reg + xgpio_regoffset(chip, bit / 32);
+
 	xgpio_set_value32(a, bit, xgpio_readreg(addr));
 }
 
 static void xgpio_write_ch(struct xgpio_instance *chip, int reg, int bit, unsigned long *a)
 {
 	void __iomem *addr = chip->regs + reg + xgpio_regoffset(chip, bit / 32);
+
 	xgpio_writereg(addr, xgpio_get_value32(a, bit));
 }
 
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index c2523ac26fac..9be1376f9a62 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -687,6 +687,9 @@ int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
 	case ACPI_PIN_CONFIG_PULLDOWN:
 		*lookupflags |= GPIO_PULL_DOWN;
 		break;
+	case ACPI_PIN_CONFIG_NOPULL:
+		*lookupflags |= GPIO_PULL_DISABLE;
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index b26e64338376..f8041d4898d1 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -434,12 +434,15 @@ struct line {
 	struct linereq *req;
 	unsigned int irq;
 	/*
-	 * eflags is set by edge_detector_setup(), edge_detector_stop() and
-	 * edge_detector_update(), which are themselves mutually exclusive,
-	 * and is accessed by edge_irq_thread() and debounce_work_func(),
-	 * which can both live with a slightly stale value.
+	 * The flags for the active edge detector configuration.
+	 *
+	 * edflags is set by linereq_create(), linereq_free(), and
+	 * linereq_set_config_unlocked(), which are themselves mutually
+	 * exclusive, and is accessed by edge_irq_thread(),
+	 * process_hw_ts_thread() and debounce_work_func(),
+	 * which can all live with a slightly stale value.
 	 */
-	u64 eflags;
+	u64 edflags;
 	/*
 	 * timestamp_ns and req_seqno are accessed only by
 	 * edge_irq_handler() and edge_irq_thread(), which are themselves
@@ -469,9 +472,7 @@ struct line {
 	 * stale value.
 	 */
 	unsigned int level;
-	/*
-	 * -- hte specific fields --
-	 */
+#ifdef CONFIG_HTE
 	struct hte_ts_desc hdesc;
 	/*
 	 * HTE provider sets line level at the time of event. The valid
@@ -488,6 +489,7 @@ struct line {
 	 * last sequence number before debounce period expires.
 	 */
 	u32 last_seqno;
+#endif /* CONFIG_HTE */
 };
 
 /**
@@ -545,6 +547,12 @@ struct linereq {
 	 GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE | \
 	 GPIO_V2_LINE_BIAS_FLAGS)
 
+/* subset of flags relevant for edge detector configuration */
+#define GPIO_V2_LINE_EDGE_DETECTOR_FLAGS \
+	(GPIO_V2_LINE_FLAG_ACTIVE_LOW | \
+	 GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE | \
+	 GPIO_V2_LINE_EDGE_FLAGS)
+
 static void linereq_put_event(struct linereq *lr,
 			      struct gpio_v2_line_event *le)
 {
@@ -567,19 +575,28 @@ static u64 line_event_timestamp(struct line *line)
 {
 	if (test_bit(FLAG_EVENT_CLOCK_REALTIME, &line->desc->flags))
 		return ktime_get_real_ns();
-	else if (test_bit(FLAG_EVENT_CLOCK_HTE, &line->desc->flags))
+	else if (IS_ENABLED(CONFIG_HTE) &&
+		 test_bit(FLAG_EVENT_CLOCK_HTE, &line->desc->flags))
 		return line->timestamp_ns;
 
 	return ktime_get_ns();
 }
 
+static u32 line_event_id(int level)
+{
+	return level ? GPIO_V2_LINE_EVENT_RISING_EDGE :
+		       GPIO_V2_LINE_EVENT_FALLING_EDGE;
+}
+
+#ifdef CONFIG_HTE
+
 static enum hte_return process_hw_ts_thread(void *p)
 {
 	struct line *line;
 	struct linereq *lr;
 	struct gpio_v2_line_event le;
+	u64 edflags;
 	int level;
-	u64 eflags;
 
 	if (!p)
 		return HTE_CB_HANDLED;
@@ -590,29 +607,26 @@ static enum hte_return process_hw_ts_thread(void *p)
 	memset(&le, 0, sizeof(le));
 
 	le.timestamp_ns = line->timestamp_ns;
-	eflags = READ_ONCE(line->eflags);
+	edflags = READ_ONCE(line->edflags);
 
-	if (eflags == GPIO_V2_LINE_FLAG_EDGE_BOTH) {
-		if (line->raw_level >= 0) {
-			if (test_bit(FLAG_ACTIVE_LOW, &line->desc->flags))
-				level = !line->raw_level;
-			else
-				level = line->raw_level;
-		} else {
-			level = gpiod_get_value_cansleep(line->desc);
-		}
+	switch (edflags & GPIO_V2_LINE_EDGE_FLAGS) {
+	case GPIO_V2_LINE_FLAG_EDGE_BOTH:
+		level = (line->raw_level >= 0) ?
+				line->raw_level :
+				gpiod_get_raw_value_cansleep(line->desc);
 
-		if (level)
-			le.id = GPIO_V2_LINE_EVENT_RISING_EDGE;
-		else
-			le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE;
-	} else if (eflags == GPIO_V2_LINE_FLAG_EDGE_RISING) {
-		/* Emit low-to-high event */
+		if (edflags & GPIO_V2_LINE_FLAG_ACTIVE_LOW)
+			level = !level;
+
+		le.id = line_event_id(level);
+		break;
+	case GPIO_V2_LINE_FLAG_EDGE_RISING:
 		le.id = GPIO_V2_LINE_EVENT_RISING_EDGE;
-	} else if (eflags == GPIO_V2_LINE_FLAG_EDGE_FALLING) {
-		/* Emit high-to-low event */
+		break;
+	case GPIO_V2_LINE_FLAG_EDGE_FALLING:
 		le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE;
-	} else {
+		break;
+	default:
 		return HTE_CB_HANDLED;
 	}
 	le.line_seqno = line->line_seqno;
@@ -659,12 +673,47 @@ static enum hte_return process_hw_ts(struct hte_ts_data *ts, void *p)
 	return HTE_CB_HANDLED;
 }
 
+static int hte_edge_setup(struct line *line, u64 eflags)
+{
+	int ret;
+	unsigned long flags = 0;
+	struct hte_ts_desc *hdesc = &line->hdesc;
+
+	if (eflags & GPIO_V2_LINE_FLAG_EDGE_RISING)
+		flags |= test_bit(FLAG_ACTIVE_LOW, &line->desc->flags) ?
+				 HTE_FALLING_EDGE_TS :
+				 HTE_RISING_EDGE_TS;
+	if (eflags & GPIO_V2_LINE_FLAG_EDGE_FALLING)
+		flags |= test_bit(FLAG_ACTIVE_LOW, &line->desc->flags) ?
+				 HTE_RISING_EDGE_TS :
+				 HTE_FALLING_EDGE_TS;
+
+	line->total_discard_seq = 0;
+
+	hte_init_line_attr(hdesc, desc_to_gpio(line->desc), flags, NULL,
+			   line->desc);
+
+	ret = hte_ts_get(NULL, hdesc, 0);
+	if (ret)
+		return ret;
+
+	return hte_request_ts_ns(hdesc, process_hw_ts, process_hw_ts_thread,
+				 line);
+}
+
+#else
+
+static int hte_edge_setup(struct line *line, u64 eflags)
+{
+	return 0;
+}
+#endif /* CONFIG_HTE */
+
 static irqreturn_t edge_irq_thread(int irq, void *p)
 {
 	struct line *line = p;
 	struct linereq *lr = line->req;
 	struct gpio_v2_line_event le;
-	u64 eflags;
 
 	/* Do not leak kernel stack to userspace */
 	memset(&le, 0, sizeof(le));
@@ -683,23 +732,17 @@ static irqreturn_t edge_irq_thread(int irq, void *p)
 	}
 	line->timestamp_ns = 0;
 
-	eflags = READ_ONCE(line->eflags);
-	if (eflags == GPIO_V2_LINE_FLAG_EDGE_BOTH) {
-		int level = gpiod_get_value_cansleep(line->desc);
-
-		if (level)
-			/* Emit low-to-high event */
-			le.id = GPIO_V2_LINE_EVENT_RISING_EDGE;
-		else
-			/* Emit high-to-low event */
-			le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE;
-	} else if (eflags == GPIO_V2_LINE_FLAG_EDGE_RISING) {
-		/* Emit low-to-high event */
+	switch (READ_ONCE(line->edflags) & GPIO_V2_LINE_EDGE_FLAGS) {
+	case GPIO_V2_LINE_FLAG_EDGE_BOTH:
+		le.id = line_event_id(gpiod_get_value_cansleep(line->desc));
+		break;
+	case GPIO_V2_LINE_FLAG_EDGE_RISING:
 		le.id = GPIO_V2_LINE_EVENT_RISING_EDGE;
-	} else if (eflags == GPIO_V2_LINE_FLAG_EDGE_FALLING) {
-		/* Emit high-to-low event */
+		break;
+	case GPIO_V2_LINE_FLAG_EDGE_FALLING:
 		le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE;
-	} else {
+		break;
+	default:
 		return IRQ_NONE;
 	}
 	line->line_seqno++;
@@ -764,16 +807,16 @@ static void debounce_work_func(struct work_struct *work)
 	struct gpio_v2_line_event le;
 	struct line *line = container_of(work, struct line, work.work);
 	struct linereq *lr;
-	int level, diff_seqno;
-	u64 eflags;
+	u64 eflags, edflags = READ_ONCE(line->edflags);
+	int level = -1;
+#ifdef CONFIG_HTE
+	int diff_seqno;
 
-	if (test_bit(FLAG_EVENT_CLOCK_HTE, &line->desc->flags)) {
+	if (edflags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE)
 		level = line->raw_level;
-		if (level < 0)
-			level = gpiod_get_raw_value_cansleep(line->desc);
-	} else {
+#endif
+	if (level < 0)
 		level = gpiod_get_raw_value_cansleep(line->desc);
-	}
 	if (level < 0) {
 		pr_debug_ratelimited("debouncer failed to read line value\n");
 		return;
@@ -785,12 +828,12 @@ static void debounce_work_func(struct work_struct *work)
 	WRITE_ONCE(line->level, level);
 
 	/* -- edge detection -- */
-	eflags = READ_ONCE(line->eflags);
+	eflags = edflags & GPIO_V2_LINE_EDGE_FLAGS;
 	if (!eflags)
 		return;
 
 	/* switch from physical level to logical - if they differ */
-	if (test_bit(FLAG_ACTIVE_LOW, &line->desc->flags))
+	if (edflags & GPIO_V2_LINE_FLAG_ACTIVE_LOW)
 		level = !level;
 
 	/* ignore edges that are not being monitored */
@@ -804,7 +847,8 @@ static void debounce_work_func(struct work_struct *work)
 	lr = line->req;
 	le.timestamp_ns = line_event_timestamp(line);
 	le.offset = gpio_chip_hwgpio(line->desc);
-	if (test_bit(FLAG_EVENT_CLOCK_HTE, &line->desc->flags)) {
+#ifdef CONFIG_HTE
+	if (edflags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE) {
 		/* discard events except the last one */
 		line->total_discard_seq -= 1;
 		diff_seqno = line->last_seqno - line->total_discard_seq -
@@ -813,51 +857,21 @@ static void debounce_work_func(struct work_struct *work)
 		le.line_seqno = line->line_seqno;
 		le.seqno = (lr->num_lines == 1) ?
 			le.line_seqno : atomic_add_return(diff_seqno, &lr->seqno);
-	} else {
+	} else
+#endif /* CONFIG_HTE */
+	{
 		line->line_seqno++;
 		le.line_seqno = line->line_seqno;
 		le.seqno = (lr->num_lines == 1) ?
 			le.line_seqno : atomic_inc_return(&lr->seqno);
 	}
 
-	if (level)
-		/* Emit low-to-high event */
-		le.id = GPIO_V2_LINE_EVENT_RISING_EDGE;
-	else
-		/* Emit high-to-low event */
-		le.id = GPIO_V2_LINE_EVENT_FALLING_EDGE;
+	le.id = line_event_id(level);
 
 	linereq_put_event(lr, &le);
 }
 
-static int hte_edge_setup(struct line *line, u64 eflags)
-{
-	int ret;
-	unsigned long flags = 0;
-	struct hte_ts_desc *hdesc = &line->hdesc;
-
-	if (eflags & GPIO_V2_LINE_FLAG_EDGE_RISING)
-		flags |= test_bit(FLAG_ACTIVE_LOW, &line->desc->flags) ?
-				  HTE_FALLING_EDGE_TS : HTE_RISING_EDGE_TS;
-	if (eflags & GPIO_V2_LINE_FLAG_EDGE_FALLING)
-		flags |= test_bit(FLAG_ACTIVE_LOW, &line->desc->flags) ?
-				  HTE_RISING_EDGE_TS : HTE_FALLING_EDGE_TS;
-
-	line->total_discard_seq = 0;
-
-	hte_init_line_attr(hdesc, desc_to_gpio(line->desc), flags,
-			   NULL, line->desc);
-
-	ret = hte_ts_get(NULL, hdesc, 0);
-	if (ret)
-		return ret;
-
-	return hte_request_ts_ns(hdesc, process_hw_ts,
-				 process_hw_ts_thread, line);
-}
-
-static int debounce_setup(struct line *line,
-			  unsigned int debounce_period_us, bool hte_req)
+static int debounce_setup(struct line *line, unsigned int debounce_period_us)
 {
 	unsigned long irqflags;
 	int ret, level, irq;
@@ -877,7 +891,8 @@ static int debounce_setup(struct line *line,
 		if (level < 0)
 			return level;
 
-		if (!hte_req) {
+		if (!(IS_ENABLED(CONFIG_HTE) &&
+		      test_bit(FLAG_EVENT_CLOCK_HTE, &line->desc->flags))) {
 			irq = gpiod_to_irq(line->desc);
 			if (irq < 0)
 				return -ENXIO;
@@ -889,9 +904,7 @@ static int debounce_setup(struct line *line,
 				return ret;
 			line->irq = irq;
 		} else {
-			ret = hte_edge_setup(line,
-					     GPIO_V2_LINE_FLAG_EDGE_RISING |
-					     GPIO_V2_LINE_FLAG_EDGE_FALLING);
+			ret = hte_edge_setup(line, GPIO_V2_LINE_FLAG_EDGE_BOTH);
 			if (ret)
 				return ret;
 		}
@@ -930,19 +943,21 @@ static u32 gpio_v2_line_config_debounce_period(struct gpio_v2_line_config *lc,
 	return 0;
 }
 
-static void edge_detector_stop(struct line *line, bool hte_en)
+static void edge_detector_stop(struct line *line)
 {
-	if (line->irq && !hte_en) {
+	if (line->irq) {
 		free_irq(line->irq, line);
 		line->irq = 0;
 	}
 
-	if (hte_en)
+#ifdef CONFIG_HTE
+	if (READ_ONCE(line->edflags) & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE)
 		hte_ts_put(&line->hdesc);
+#endif
 
 	cancel_delayed_work_sync(&line->work);
 	WRITE_ONCE(line->sw_debounced, 0);
-	WRITE_ONCE(line->eflags, 0);
+	WRITE_ONCE(line->edflags, 0);
 	if (line->desc)
 		WRITE_ONCE(line->desc->debounce_period_us, 0);
 	/* do not change line->level - see comment in debounced_value() */
@@ -950,23 +965,23 @@ static void edge_detector_stop(struct line *line, bool hte_en)
 
 static int edge_detector_setup(struct line *line,
 			       struct gpio_v2_line_config *lc,
-			       unsigned int line_idx,
-			       u64 eflags, bool hte_req)
+			       unsigned int line_idx, u64 edflags)
 {
 	u32 debounce_period_us;
 	unsigned long irqflags = 0;
+	u64 eflags;
 	int irq, ret;
 
+	eflags = edflags & GPIO_V2_LINE_EDGE_FLAGS;
 	if (eflags && !kfifo_initialized(&line->req->events)) {
 		ret = kfifo_alloc(&line->req->events,
 				  line->req->event_buffer_size, GFP_KERNEL);
 		if (ret)
 			return ret;
 	}
-	WRITE_ONCE(line->eflags, eflags);
 	if (gpio_v2_line_config_debounced(lc, line_idx)) {
 		debounce_period_us = gpio_v2_line_config_debounce_period(lc, line_idx);
-		ret = debounce_setup(line, debounce_period_us, hte_req);
+		ret = debounce_setup(line, debounce_period_us);
 		if (ret)
 			return ret;
 		WRITE_ONCE(line->desc->debounce_period_us, debounce_period_us);
@@ -976,8 +991,9 @@ static int edge_detector_setup(struct line *line,
 	if (!eflags || READ_ONCE(line->sw_debounced))
 		return 0;
 
-	if (hte_req)
-		return hte_edge_setup(line, eflags);
+	if (IS_ENABLED(CONFIG_HTE) &&
+	    (edflags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE))
+		return hte_edge_setup(line, edflags);
 
 	irq = gpiod_to_irq(line->desc);
 	if (irq < 0)
@@ -1003,35 +1019,29 @@ static int edge_detector_setup(struct line *line,
 
 static int edge_detector_update(struct line *line,
 				struct gpio_v2_line_config *lc,
-				unsigned int line_idx,
-				u64 flags, bool polarity_change,
-				bool prev_hte_flag)
+				unsigned int line_idx, u64 edflags)
 {
-	u64 eflags = flags & GPIO_V2_LINE_EDGE_FLAGS;
+	u64 active_edflags = READ_ONCE(line->edflags);
 	unsigned int debounce_period_us =
 			gpio_v2_line_config_debounce_period(lc, line_idx);
-	bool hte_change = (prev_hte_flag !=
-		      ((flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE) != 0));
 
-	if ((READ_ONCE(line->eflags) == eflags) && !polarity_change &&
-	    (READ_ONCE(line->desc->debounce_period_us) == debounce_period_us)
-	    && !hte_change)
+	if ((active_edflags == edflags) &&
+	    (READ_ONCE(line->desc->debounce_period_us) == debounce_period_us))
 		return 0;
 
 	/* sw debounced and still will be...*/
 	if (debounce_period_us && READ_ONCE(line->sw_debounced)) {
-		WRITE_ONCE(line->eflags, eflags);
 		WRITE_ONCE(line->desc->debounce_period_us, debounce_period_us);
 		return 0;
 	}
 
 	/* reconfiguring edge detection or sw debounce being disabled */
-	if ((line->irq && !READ_ONCE(line->sw_debounced)) || prev_hte_flag ||
+	if ((line->irq && !READ_ONCE(line->sw_debounced)) ||
+	    (active_edflags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE) ||
 	    (!debounce_period_us && READ_ONCE(line->sw_debounced)))
-		edge_detector_stop(line, prev_hte_flag);
+		edge_detector_stop(line);
 
-	return edge_detector_setup(line, lc, line_idx, eflags,
-				   flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE);
+	return edge_detector_setup(line, lc, line_idx, edflags);
 }
 
 static u64 gpio_v2_line_config_flags(struct gpio_v2_line_config *lc,
@@ -1067,6 +1077,11 @@ static int gpio_v2_line_flags_validate(u64 flags)
 	/* Return an error if an unknown flag is set */
 	if (flags & ~GPIO_V2_LINE_VALID_FLAGS)
 		return -EINVAL;
+
+	if (!IS_ENABLED(CONFIG_HTE) &&
+	    (flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE))
+		return -EOPNOTSUPP;
+
 	/*
 	 * Do not allow both INPUT and OUTPUT flags to be set as they are
 	 * contradictory.
@@ -1076,7 +1091,8 @@ static int gpio_v2_line_flags_validate(u64 flags)
 		return -EINVAL;
 
 	/* Only allow one event clock source */
-	if ((flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME) &&
+	if (IS_ENABLED(CONFIG_HTE) &&
+	    (flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME) &&
 	    (flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE))
 		return -EINVAL;
 
@@ -1300,22 +1316,17 @@ static long linereq_set_config_unlocked(struct linereq *lr,
 					struct gpio_v2_line_config *lc)
 {
 	struct gpio_desc *desc;
+	struct line *line;
 	unsigned int i;
-	u64 flags;
-	bool polarity_change;
-	bool prev_hte_flag;
+	u64 flags, edflags;
 	int ret;
 
 	for (i = 0; i < lr->num_lines; i++) {
+		line = &lr->lines[i];
 		desc = lr->lines[i].desc;
 		flags = gpio_v2_line_config_flags(lc, i);
-		polarity_change =
-			(!!test_bit(FLAG_ACTIVE_LOW, &desc->flags) !=
-			 ((flags & GPIO_V2_LINE_FLAG_ACTIVE_LOW) != 0));
-
-		prev_hte_flag = !!test_bit(FLAG_EVENT_CLOCK_HTE, &desc->flags);
-
 		gpio_v2_line_config_flags_to_desc_flags(flags, &desc->flags);
+		edflags = flags & GPIO_V2_LINE_EDGE_DETECTOR_FLAGS;
 		/*
 		 * Lines have to be requested explicitly for input
 		 * or output, else the line will be treated "as is".
@@ -1323,7 +1334,7 @@ static long linereq_set_config_unlocked(struct linereq *lr,
 		if (flags & GPIO_V2_LINE_FLAG_OUTPUT) {
 			int val = gpio_v2_line_config_output_value(lc, i);
 
-			edge_detector_stop(&lr->lines[i], prev_hte_flag);
+			edge_detector_stop(line);
 			ret = gpiod_direction_output(desc, val);
 			if (ret)
 				return ret;
@@ -1332,12 +1343,13 @@ static long linereq_set_config_unlocked(struct linereq *lr,
 			if (ret)
 				return ret;
 
-			ret = edge_detector_update(&lr->lines[i], lc, i,
-					flags, polarity_change, prev_hte_flag);
+			ret = edge_detector_update(line, lc, i, edflags);
 			if (ret)
 				return ret;
 		}
 
+		WRITE_ONCE(line->edflags, edflags);
+
 		blocking_notifier_call_chain(&desc->gdev->notifier,
 					     GPIO_V2_LINE_CHANGED_CONFIG,
 					     desc);
@@ -1464,15 +1476,12 @@ static ssize_t linereq_read(struct file *file,
 static void linereq_free(struct linereq *lr)
 {
 	unsigned int i;
-	bool hte = false;
 
 	for (i = 0; i < lr->num_lines; i++) {
-		if (lr->lines[i].desc)
-			hte = !!test_bit(FLAG_EVENT_CLOCK_HTE,
-					 &lr->lines[i].desc->flags);
-		edge_detector_stop(&lr->lines[i], hte);
-		if (lr->lines[i].desc)
+		if (lr->lines[i].desc) {
+			edge_detector_stop(&lr->lines[i]);
 			gpiod_free(lr->lines[i].desc);
+		}
 	}
 	kfifo_free(&lr->events);
 	kfree(lr->label);
@@ -1506,7 +1515,7 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip)
 	struct gpio_v2_line_config *lc;
 	struct linereq *lr;
 	struct file *file;
-	u64 flags;
+	u64 flags, edflags;
 	unsigned int i;
 	int fd, ret;
 
@@ -1580,6 +1589,7 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip)
 		if (ret < 0)
 			goto out_free_linereq;
 
+		edflags = flags & GPIO_V2_LINE_EDGE_DETECTOR_FLAGS;
 		/*
 		 * Lines have to be requested explicitly for input
 		 * or output, else the line will be treated "as is".
@@ -1596,12 +1606,13 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip)
 				goto out_free_linereq;
 
 			ret = edge_detector_setup(&lr->lines[i], lc, i,
-				flags & GPIO_V2_LINE_EDGE_FLAGS,
-				flags & GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE);
+						  edflags);
 			if (ret)
 				goto out_free_linereq;
 		}
 
+		lr->lines[i].edflags = edflags;
+
 		blocking_notifier_call_chain(&desc->gdev->notifier,
 					     GPIO_V2_LINE_CHANGED_REQUESTED, desc);
 
diff --git a/drivers/gpio/gpiolib-devres.c b/drivers/gpio/gpiolib-devres.c
index 79da85d17b71..16a696249229 100644
--- a/drivers/gpio/gpiolib-devres.c
+++ b/drivers/gpio/gpiolib-devres.c
@@ -375,9 +375,6 @@ void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs)
 }
 EXPORT_SYMBOL_GPL(devm_gpiod_put_array);
 
-
-
-
 static void devm_gpio_release(struct device *dev, void *res)
 {
 	unsigned *gpio = res;
@@ -385,13 +382,6 @@ static void devm_gpio_release(struct device *dev, void *res)
 	gpio_free(*gpio);
 }
 
-static int devm_gpio_match(struct device *dev, void *res, void *data)
-{
-	unsigned *this = res, *gpio = data;
-
-	return *this == *gpio;
-}
-
 /**
  *      devm_gpio_request - request a GPIO for a managed device
  *      @dev: device to request the GPIO for
@@ -402,11 +392,7 @@ static int devm_gpio_match(struct device *dev, void *res, void *data)
  *      same arguments and performs the same function as
  *      gpio_request().  GPIOs requested with this function will be
  *      automatically freed on driver detach.
- *
- *      If an GPIO allocated with this function needs to be freed
- *      separately, devm_gpio_free() must be used.
  */
-
 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
 {
 	unsigned *dr;
@@ -459,24 +445,6 @@ int devm_gpio_request_one(struct device *dev, unsigned gpio,
 }
 EXPORT_SYMBOL_GPL(devm_gpio_request_one);
 
-/**
- *      devm_gpio_free - free a GPIO
- *      @dev: device to free GPIO for
- *      @gpio: GPIO to free
- *
- *      Except for the extra @dev argument, this function takes the
- *      same arguments and performs the same function as gpio_free().
- *      This function instead of gpio_free() should be used to manually
- *      free GPIOs allocated with devm_gpio_request().
- */
-void devm_gpio_free(struct device *dev, unsigned int gpio)
-{
-
-	WARN_ON(devres_release(dev, devm_gpio_release, devm_gpio_match,
-		&gpio));
-}
-EXPORT_SYMBOL_GPL(devm_gpio_free);
-
 static void devm_gpio_chip_release(void *data)
 {
 	struct gpio_chip *gc = data;
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 3d6c3ffd5576..a037b50bef33 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -354,6 +354,9 @@ struct gpio_desc *gpiod_get_from_of_node(const struct device_node *node,
 	if (flags & OF_GPIO_PULL_DOWN)
 		lflags |= GPIO_PULL_DOWN;
 
+	if (flags & OF_GPIO_PULL_DISABLE)
+		lflags |= GPIO_PULL_DISABLE;
+
 	ret = gpiod_configure_flags(desc, propname, lflags, dflags);
 	if (ret < 0) {
 		gpiod_put(desc);
@@ -556,6 +559,8 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 		*flags |= GPIO_PULL_UP;
 	if (of_flags & OF_GPIO_PULL_DOWN)
 		*flags |= GPIO_PULL_DOWN;
+	if (of_flags & OF_GPIO_PULL_DISABLE)
+		*flags |= GPIO_PULL_DISABLE;
 
 	return desc;
 }
@@ -621,6 +626,8 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
 		*lflags |= GPIO_PULL_UP;
 	if (xlate_flags & OF_GPIO_PULL_DOWN)
 		*lflags |= GPIO_PULL_DOWN;
+	if (xlate_flags & OF_GPIO_PULL_DISABLE)
+		*lflags |= GPIO_PULL_DISABLE;
 
 	if (of_property_read_bool(np, "input"))
 		*dflags |= GPIOD_IN;
@@ -720,7 +727,7 @@ static void of_gpiochip_remove_hog(struct gpio_chip *chip,
 
 static int of_gpiochip_match_node(struct gpio_chip *chip, void *data)
 {
-	return chip->gpiodev->dev.of_node == data;
+	return device_match_of_node(&chip->gpiodev->dev, data);
 }
 
 static struct gpio_chip *of_find_gpiochip_by_node(struct device_node *np)
@@ -860,7 +867,8 @@ int of_mm_gpiochip_add_data(struct device_node *np,
 	if (mm_gc->save_regs)
 		mm_gc->save_regs(mm_gc);
 
-	mm_gc->gc.of_node = np;
+	of_node_put(mm_gc->gc.of_node);
+	mm_gc->gc.of_node = of_node_get(np);
 
 	ret = gpiochip_add_data(gc, data);
 	if (ret)
@@ -868,6 +876,7 @@ int of_mm_gpiochip_add_data(struct device_node *np,
 
 	return 0;
 err2:
+	of_node_put(np);
 	iounmap(mm_gc->regs);
 err1:
 	kfree(gc->label);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 68d9f95d7799..cc9c0a12259e 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3942,9 +3942,11 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
 	if (lflags & GPIO_OPEN_SOURCE)
 		set_bit(FLAG_OPEN_SOURCE, &desc->flags);
 
-	if ((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DOWN)) {
+	if (((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DOWN)) ||
+	    ((lflags & GPIO_PULL_UP) && (lflags & GPIO_PULL_DISABLE)) ||
+	    ((lflags & GPIO_PULL_DOWN) && (lflags & GPIO_PULL_DISABLE))) {
 		gpiod_err(desc,
-			  "both pull-up and pull-down enabled, invalid configuration\n");
+			  "multiple pull-up, pull-down or pull-disable enabled, invalid configuration\n");
 		return -EINVAL;
 	}
 
@@ -3952,6 +3954,8 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
 		set_bit(FLAG_PULL_UP, &desc->flags);
 	else if (lflags & GPIO_PULL_DOWN)
 		set_bit(FLAG_PULL_DOWN, &desc->flags);
+	else if (lflags & GPIO_PULL_DISABLE)
+		set_bit(FLAG_BIAS_DISABLE, &desc->flags);
 
 	ret = gpiod_set_transitory(desc, (lflags & GPIO_TRANSITORY));
 	if (ret < 0)
diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c
index 8c3832a58ef6..ac1d18039568 100644
--- a/drivers/mfd/ucb1400_core.c
+++ b/drivers/mfd/ucb1400_core.c
@@ -72,11 +72,9 @@ static int ucb1400_core_probe(struct device *dev)
 
 	/* GPIO */
 	ucb_gpio.ac97 = ac97;
-	if (pdata) {
-		ucb_gpio.gpio_setup = pdata->gpio_setup;
-		ucb_gpio.gpio_teardown = pdata->gpio_teardown;
+	if (pdata)
 		ucb_gpio.gpio_offset = pdata->gpio_offset;
-	}
+
 	ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1);
 	if (!ucb->ucb1400_gpio) {
 		err = -ENOMEM;
diff --git a/include/dt-bindings/gpio/gpio.h b/include/dt-bindings/gpio/gpio.h
index c029467e828b..5566e58196a2 100644
--- a/include/dt-bindings/gpio/gpio.h
+++ b/include/dt-bindings/gpio/gpio.h
@@ -39,4 +39,7 @@
 /* Bit 5 express pull down */
 #define GPIO_PULL_DOWN 32
 
+/* Bit 6 express pull disable */
+#define GPIO_PULL_DISABLE 64
+
 #endif
diff --git a/include/linux/gpio.h b/include/linux/gpio.h
index 008ad3ee56b7..a370387fa406 100644
--- a/include/linux/gpio.h
+++ b/include/linux/gpio.h
@@ -95,7 +95,6 @@ struct device;
 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
 int devm_gpio_request_one(struct device *dev, unsigned gpio,
 			  unsigned long flags, const char *label);
-void devm_gpio_free(struct device *dev, unsigned int gpio);
 
 #else /* ! CONFIG_GPIOLIB */
 
@@ -240,11 +239,6 @@ static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,
 	return -EINVAL;
 }
 
-static inline void devm_gpio_free(struct device *dev, unsigned int gpio)
-{
-	WARN_ON(1);
-}
-
 #endif /* ! CONFIG_GPIOLIB */
 
 #endif /* __LINUX_GPIO_H */
diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h
index 4d55da28e664..0b619eb7ae83 100644
--- a/include/linux/gpio/machine.h
+++ b/include/linux/gpio/machine.h
@@ -14,6 +14,7 @@ enum gpio_lookup_flags {
 	GPIO_TRANSITORY			= (1 << 3),
 	GPIO_PULL_UP			= (1 << 4),
 	GPIO_PULL_DOWN			= (1 << 5),
+	GPIO_PULL_DISABLE		= (1 << 6),
 
 	GPIO_LOOKUP_FLAGS_DEFAULT	= GPIO_ACTIVE_HIGH | GPIO_PERSISTENT,
 };
diff --git a/include/linux/mfd/twl.h b/include/linux/mfd/twl.h
index 8871cc5188a0..c8cd31756037 100644
--- a/include/linux/mfd/twl.h
+++ b/include/linux/mfd/twl.h
@@ -594,8 +594,6 @@ struct twl4030_gpio_platform_data {
 
 	int		(*setup)(struct device *dev,
 				unsigned gpio, unsigned ngpio);
-	int		(*teardown)(struct device *dev,
-				unsigned gpio, unsigned ngpio);
 };
 
 struct twl4030_madc_platform_data {
diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h
index 8bf2ea859653..a5166eb93437 100644
--- a/include/linux/of_gpio.h
+++ b/include/linux/of_gpio.h
@@ -29,6 +29,7 @@ enum of_gpio_flags {
 	OF_GPIO_TRANSITORY = 0x8,
 	OF_GPIO_PULL_UP = 0x10,
 	OF_GPIO_PULL_DOWN = 0x20,
+	OF_GPIO_PULL_DISABLE = 0x40,
 };
 
 #ifdef CONFIG_OF_GPIO
diff --git a/include/linux/ucb1400.h b/include/linux/ucb1400.h
index 0968ef458447..22345391350b 100644
--- a/include/linux/ucb1400.h
+++ b/include/linux/ucb1400.h
@@ -84,8 +84,6 @@ struct ucb1400_gpio {
 	struct gpio_chip	gc;
 	struct snd_ac97		*ac97;
 	int			gpio_offset;
-	int			(*gpio_setup)(struct device *dev, int ngpio);
-	int			(*gpio_teardown)(struct device *dev, int ngpio);
 };
 
 struct ucb1400_ts {