ARM: imx: remove i.MX31 SoC support

The Freescale i.MX31 was an early SoC based on the ARM1136r0 CPU core. It
was used in the Bug Labs modular computer but ultimately much less
popular than most other i.MX SoCs.

As the ARM1136r0 support is causing a lot of extra maintenance effort
to keep alive and there are no known users, remove i.MX31 in order to
allow removing support for that CPU core altogether.

The related i.MX35 is based on a slightly newer ARM1136r1 CPU core that
does not have this problem, so there is no reason to remove that.

Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: imx@lists.linux.dev
Cc: devicetree@vger.kernel.org
Acked-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Daniel Baluta <daniel.baluta@nxp.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260914140821.1805449-8-arnd@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

4 files changed, 0 insertions, 574 deletions

diff --git a/arch/arm/boot/dts/nxp/imx/Makefile b/arch/arm/boot/dts/nxp/imx/Makefile
index 1a2539fa19b4..e0747cb6e772 100644
--- a/arch/arm/boot/dts/nxp/imx/Makefile
+++ b/arch/arm/boot/dts/nxp/imx/Makefile
@@ -16,9 +16,6 @@ dtb-$(CONFIG_SOC_IMX27) += \
 	imx27-pdk.dtb \
 	imx27-phytec-phycore-rdk.dtb \
 	imx27-phytec-phycard-s-rdk.dtb
-dtb-$(CONFIG_SOC_IMX31) += \
-	imx31-bug.dtb \
-	imx31-lite.dtb
 dtb-$(CONFIG_SOC_IMX35) += \
 	imx35-eukrea-mbimxsd35-baseboard.dtb \
 	imx35-pdk.dtb
diff --git a/arch/arm/boot/dts/nxp/imx/imx31-bug.dts b/arch/arm/boot/dts/nxp/imx/imx31-bug.dts
deleted file mode 100644
index d87eee3f9b3c..000000000000
--- a/arch/arm/boot/dts/nxp/imx/imx31-bug.dts
+++ /dev/null
@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright 2012 Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
- */
-
-/dts-v1/;
-#include "imx31.dtsi"
-
-/ {
-	model = "Buglabs i.MX31 Bug 1.x";
-	compatible = "buglabs,imx31-bug", "fsl,imx31";
-
-	memory@80000000 {
-		device_type = "memory";
-		reg = <0x80000000 0x8000000>; /* 128M */
-	};
-};
-
-&uart5 {
-	uart-has-rtscts;
-	status = "okay";
-};
diff --git a/arch/arm/boot/dts/nxp/imx/imx31-lite.dts b/arch/arm/boot/dts/nxp/imx/imx31-lite.dts
deleted file mode 100644
index 630f8fa69ba8..000000000000
--- a/arch/arm/boot/dts/nxp/imx/imx31-lite.dts
+++ /dev/null
@@ -1,178 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-//
-// Copyright (C) 2016-2018 Vladimir Zapolskiy <vz@mleia.com>
-
-/dts-v1/;
-
-#include "imx31.dtsi"
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/interrupt-controller/irq.h>
-
-/ {
-	model = "LogicPD i.MX31 Lite";
-	compatible = "logicpd,imx31-lite", "fsl,imx31";
-
-	chosen {
-		stdout-path = &uart1;
-	};
-
-	memory@80000000 {
-		device_type = "memory";
-		reg = <0x80000000 0x8000000>;
-	};
-
-	leds {
-		compatible = "gpio-leds";
-
-		led0 {
-			gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
-		};
-
-		led1 {
-			gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
-		};
-	};
-};
-
-&ata {
-	status = "okay";
-};
-
-&nfc {
-	nand-bus-width = <8>;
-	nand-ecc-mode = "hw";
-	nand-on-flash-bbt;
-	status = "okay";
-};
-
-&sdhci1 {
-	bus-width = <4>;
-	cd-gpios = <&gpio2 11 GPIO_ACTIVE_HIGH>;
-	wp-gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
-	status = "okay";
-};
-
-&spi2 {
-	status = "okay";
-
-	pmic@0 {
-		compatible = "fsl,mc13783";
-		reg = <0>;
-		spi-cs-high;
-		spi-max-frequency = <1000000>;
-		interrupt-parent = <&gpio1>;
-		interrupts = <3 IRQ_TYPE_EDGE_RISING>;
-
-		fsl,mc13xxx-uses-adc;
-		fsl,mc13xxx-uses-rtc;
-
-		regulators {
-			sw1a {		/* QVCC */
-				regulator-min-microvolt = <1200000>;
-				regulator-max-microvolt = <1500000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			sw1b {		/* QVCC */
-				regulator-min-microvolt = <1200000>;
-				regulator-max-microvolt = <1500000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			sw2a {		/* 1.8V_DDR, NVCC2, NVCC21 and NVCC22 */
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			sw2b {		/* NVCC10 */
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			violo {		/* NVCC1 and NVCC7 */
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			viohi {		/* VIOHI */
-				regulator-min-microvolt = <2775000>;
-				regulator-max-microvolt = <2775000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			vaudio {	/* VAUDIO */
-				regulator-min-microvolt = <2775000>;
-				regulator-max-microvolt = <2775000>;
-			};
-
-			vcam {		/* NVCC4 */
-				regulator-min-microvolt = <2800000>;
-				regulator-max-microvolt = <2800000>;
-			};
-
-			vgen {		/* NVCC5 / NVCC8 and NVCC6 / NVCC9 */
-				regulator-min-microvolt = <2775000>;
-				regulator-max-microvolt = <2775000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-
-			vmmc2 {		/* NVCC3 */
-				regulator-min-microvolt = <1600000>;
-				regulator-max-microvolt = <3000000>;
-				regulator-always-on;
-				regulator-boot-on;
-			};
-		};
-	};
-};
-
-&uart1 {
-	uart-has-rtscts;
-	status = "okay";
-};
-
-/* Routed to the extension board */
-&uart2 {
-	uart-has-rtscts;
-	status = "okay";
-};
-
-/* Routed to the extension board */
-&uart3 {
-	uart-has-rtscts;
-	status = "okay";
-};
-
-&weim {
-	status = "okay";
-
-	flash@0,0 {
-		compatible = "cfi-flash";
-		reg = <0 0x0 0x200000>;
-		bank-width = <2>;
-		linux,mtd-name = "physmap-flash.0";
-		fsl,weim-cs-timing = <0x0000cf03 0xa0330d01 0x00220800>;
-	};
-
-	ethernet@4,0 {
-		compatible = "smsc,lan9117", "smsc,lan9115";
-		reg = <4 0x0 0x100>;
-		interrupt-parent = <&gpio1>;
-		interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
-		phy-mode = "mii";
-		reg-io-width = <2>;
-		smsc,irq-push-pull;
-		fsl,weim-cs-timing = <0x00008701 0x04000541 0x00010000>;
-	};
-};
diff --git a/arch/arm/boot/dts/nxp/imx/imx31.dtsi b/arch/arm/boot/dts/nxp/imx/imx31.dtsi
deleted file mode 100644
index c58f855ea851..000000000000
--- a/arch/arm/boot/dts/nxp/imx/imx31.dtsi
+++ /dev/null
@@ -1,371 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-//
-// Copyright 2016-2018 Vladimir Zapolskiy <vz@mleia.com>
-// Copyright 2012 Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
-
-/ {
-	#address-cells = <1>;
-	#size-cells = <1>;
-	/*
-	 * The decompressor and also some bootloaders rely on a
-	 * pre-existing /chosen node to be available to insert the
-	 * command line and merge other ATAGS info.
-	 */
-	chosen {};
-
-	aliases {
-		gpio0 = &gpio1;
-		gpio1 = &gpio2;
-		gpio2 = &gpio3;
-		i2c0 = &i2c1;
-		i2c1 = &i2c2;
-		i2c2 = &i2c3;
-		serial0 = &uart1;
-		serial1 = &uart2;
-		serial2 = &uart3;
-		serial3 = &uart4;
-		serial4 = &uart5;
-		spi0 = &spi1;
-		spi1 = &spi2;
-		spi2 = &spi3;
-	};
-
-	cpus {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		cpu@0 {
-			compatible = "arm,arm1136jf-s";
-			device_type = "cpu";
-			reg = <0>;
-		};
-	};
-
-	avic: interrupt-controller@68000000 {
-		compatible = "fsl,imx31-avic", "fsl,avic";
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		reg = <0x68000000 0x100000>;
-	};
-
-	soc: soc {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "simple-bus";
-		interrupt-parent = <&avic>;
-		ranges;
-
-		iram: sram@1fffc000 {
-			compatible = "mmio-sram";
-			reg = <0x1fffc000 0x4000>;
-			#address-cells = <1>;
-			#size-cells = <1>;
-			ranges = <0 0x1fffc000 0x4000>;
-		};
-
-		aips1: bus@43f00000 { /* AIPS1 */
-			compatible = "fsl,aips-bus", "simple-bus";
-			#address-cells = <1>;
-			#size-cells = <1>;
-			reg = <0x43f00000 0x100000>;
-			ranges;
-
-			i2c1: i2c@43f80000 {
-				compatible = "fsl,imx31-i2c", "fsl,imx21-i2c";
-				reg = <0x43f80000 0x4000>;
-				interrupts = <10>;
-				clocks = <&clks 33>;
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			i2c3: i2c@43f84000 {
-				compatible = "fsl,imx31-i2c", "fsl,imx21-i2c";
-				reg = <0x43f84000 0x4000>;
-				interrupts = <3>;
-				clocks = <&clks 35>;
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			ata: ata@43f8c000 {
-				compatible = "fsl,imx31-pata", "fsl,imx27-pata";
-				reg = <0x43f8c000 0x4000>;
-				interrupts = <15>;
-				clocks = <&clks 26>;
-				status = "disabled";
-			};
-
-			uart1: serial@43f90000 {
-				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
-				reg = <0x43f90000 0x4000>;
-				interrupts = <45>;
-				clocks = <&clks 10>, <&clks 30>;
-				clock-names = "ipg", "per";
-				status = "disabled";
-			};
-
-			uart2: serial@43f94000 {
-				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
-				reg = <0x43f94000 0x4000>;
-				interrupts = <32>;
-				clocks = <&clks 10>, <&clks 31>;
-				clock-names = "ipg", "per";
-				status = "disabled";
-			};
-
-			i2c2: i2c@43f98000 {
-				compatible = "fsl,imx31-i2c", "fsl,imx21-i2c";
-				reg = <0x43f98000 0x4000>;
-				interrupts = <4>;
-				clocks = <&clks 34>;
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			spi1: spi@43fa4000 {
-				compatible = "fsl,imx31-cspi";
-				reg = <0x43fa4000 0x4000>;
-				interrupts = <14>;
-				clocks = <&clks 10>, <&clks 53>;
-				clock-names = "ipg", "per";
-				dmas = <&sdma 8 8 0>, <&sdma 9 8 0>;
-				dma-names = "rx", "tx";
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			kpp: kpp@43fa8000 {
-				compatible = "fsl,imx31-kpp", "fsl,imx21-kpp";
-				reg = <0x43fa8000 0x4000>;
-				interrupts = <24>;
-				clocks = <&clks 46>;
-				status = "disabled";
-			};
-
-			uart4: serial@43fb0000 {
-				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
-				reg = <0x43fb0000 0x4000>;
-				clocks = <&clks 10>, <&clks 49>;
-				clock-names = "ipg", "per";
-				interrupts = <46>;
-				status = "disabled";
-			};
-
-			uart5: serial@43fb4000 {
-				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
-				reg = <0x43fb4000 0x4000>;
-				interrupts = <47>;
-				clocks = <&clks 10>, <&clks 50>;
-				clock-names = "ipg", "per";
-				status = "disabled";
-			};
-		};
-
-		spba-bus@50000000 {
-			compatible = "fsl,spba-bus", "simple-bus";
-			#address-cells = <1>;
-			#size-cells = <1>;
-			reg = <0x50000000 0x100000>;
-			ranges;
-
-			sdhci1: mmc@50004000 {
-				compatible = "fsl,imx31-mmc";
-				reg = <0x50004000 0x4000>;
-				interrupts = <9>;
-				clocks = <&clks 10>, <&clks 20>;
-				clock-names = "ipg", "per";
-				dmas = <&sdma 20 3 0>;
-				dma-names = "rx-tx";
-				status = "disabled";
-			};
-
-			sdhci2: mmc@50008000 {
-				compatible = "fsl,imx31-mmc";
-				reg = <0x50008000 0x4000>;
-				interrupts = <8>;
-				clocks = <&clks 10>, <&clks 21>;
-				clock-names = "ipg", "per";
-				dmas = <&sdma 21 3 0>;
-				dma-names = "rx-tx";
-				status = "disabled";
-			};
-
-			uart3: serial@5000c000 {
-				compatible = "fsl,imx31-uart", "fsl,imx21-uart";
-				reg = <0x5000c000 0x4000>;
-				interrupts = <18>;
-				clocks = <&clks 10>, <&clks 48>;
-				clock-names = "ipg", "per";
-				status = "disabled";
-			};
-
-			spi2: spi@50010000 {
-				compatible = "fsl,imx31-cspi";
-				reg = <0x50010000 0x4000>;
-				interrupts = <13>;
-				clocks = <&clks 10>, <&clks 54>;
-				clock-names = "ipg", "per";
-				dmas = <&sdma 6 8 0>, <&sdma 7 8 0>;
-				dma-names = "rx", "tx";
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			iim: efuse@5001c000 {
-				compatible = "fsl,imx31-iim";
-				reg = <0x5001c000 0x1000>;
-				interrupts = <19>;
-				clocks = <&clks 25>;
-			};
-		};
-
-		bus@53f00000 { /* AIPS2 */
-			compatible = "fsl,aips-bus", "simple-bus";
-			#address-cells = <1>;
-			#size-cells = <1>;
-			reg = <0x53f00000 0x100000>;
-			ranges;
-
-			clks: ccm@53f80000 {
-				compatible = "fsl,imx31-ccm";
-				reg = <0x53f80000 0x4000>;
-				interrupts = <31>, <53>;
-				#clock-cells = <1>;
-			};
-
-			spi3: spi@53f84000 {
-				compatible = "fsl,imx31-cspi";
-				reg = <0x53f84000 0x4000>;
-				interrupts = <17>;
-				clocks = <&clks 10>, <&clks 28>;
-				clock-names = "ipg", "per";
-				dmas = <&sdma 10 8 0>, <&sdma 11 8 0>;
-				dma-names = "rx", "tx";
-				#address-cells = <1>;
-				#size-cells = <0>;
-				status = "disabled";
-			};
-
-			gpt: timer@53f90000 {
-				compatible = "fsl,imx31-gpt";
-				reg = <0x53f90000 0x4000>;
-				interrupts = <29>;
-				clocks = <&clks 10>, <&clks 22>;
-				clock-names = "ipg", "per";
-			};
-
-			gpio3: gpio@53fa4000 {
-				compatible = "fsl,imx31-gpio";
-				reg = <0x53fa4000 0x4000>;
-				interrupts = <56>;
-				gpio-controller;
-				#gpio-cells = <2>;
-				interrupt-controller;
-				#interrupt-cells = <2>;
-			};
-
-			rng@53fb0000 {
-				compatible = "fsl,imx31-rnga";
-				reg = <0x53fb0000 0x4000>;
-				interrupts = <22>;
-				clocks = <&clks 29>;
-			};
-
-			gpio1: gpio@53fcc000 {
-				compatible = "fsl,imx31-gpio";
-				reg = <0x53fcc000 0x4000>;
-				interrupts = <52>;
-				gpio-controller;
-				#gpio-cells = <2>;
-				interrupt-controller;
-				#interrupt-cells = <2>;
-			};
-
-			gpio2: gpio@53fd0000 {
-				compatible = "fsl,imx31-gpio";
-				reg = <0x53fd0000 0x4000>;
-				interrupts = <51>;
-				gpio-controller;
-				#gpio-cells = <2>;
-				interrupt-controller;
-				#interrupt-cells = <2>;
-			};
-
-			sdma: dma-controller@53fd4000 {
-				compatible = "fsl,imx31-sdma";
-				reg = <0x53fd4000 0x4000>;
-				interrupts = <34>;
-				clocks = <&clks 10>, <&clks 27>;
-				clock-names = "ipg", "ahb";
-				#dma-cells = <3>;
-				fsl,sdma-ram-script-name = "imx/sdma/sdma-imx31.bin";
-			};
-
-			rtc: rtc@53fd8000 {
-				compatible = "fsl,imx31-rtc", "fsl,imx21-rtc";
-				reg = <0x53fd8000 0x4000>;
-				interrupts = <25>;
-				clocks = <&clks 2>, <&clks 40>;
-				clock-names = "ref", "ipg";
-			};
-
-			wdog: watchdog@53fdc000 {
-				compatible = "fsl,imx31-wdt", "fsl,imx21-wdt";
-				reg = <0x53fdc000 0x4000>;
-				clocks = <&clks 41>;
-				interrupts = <55>;
-			};
-
-			pwm: pwm@53fe0000 {
-				compatible = "fsl,imx31-pwm", "fsl,imx27-pwm";
-				reg = <0x53fe0000 0x4000>;
-				interrupts = <26>;
-				clocks = <&clks 10>, <&clks 42>;
-				clock-names = "ipg", "per";
-				#pwm-cells = <3>;
-				status = "disabled";
-			};
-		};
-
-		emi-bus@b8000000 { /* External Memory Interface */
-			compatible = "simple-bus";
-			reg = <0xb8000000 0x5000>;
-			ranges;
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			nfc: nand-controller@b8000000 {
-				compatible = "fsl,imx31-nand", "fsl,imx27-nand";
-				reg = <0xb8000000 0x1000>;
-				interrupts = <33>;
-				clocks = <&clks 9>;
-				dmas = <&sdma 30 17 0>;
-				dma-names = "rx-tx";
-				#address-cells = <1>;
-				#size-cells = <1>;
-				status = "disabled";
-			};
-
-			weim: memory-controller@b8002000 {
-				compatible = "fsl,imx31-weim", "fsl,imx27-weim";
-				reg = <0xb8002000 0x1000>;
-				clocks = <&clks 56>;
-				#address-cells = <2>;
-				#size-cells = <1>;
-				ranges = <0 0 0xa0000000 0x08000000
-					  1 0 0xa8000000 0x08000000
-					  2 0 0xb0000000 0x02000000
-					  3 0 0xb2000000 0x02000000
-					  4 0 0xb4000000 0x02000000
-					  5 0 0xb6000000 0x02000000>;
-				status = "disabled";
-			};
-		};
-	};
-};