Merge tag 'spi-nor/for-6.2' into mtd/next

SPI NOR core changes:
* Add support for flash reset using the dt reset-gpios property.
* Update hwcaps.mask to include 8D-8D-8D read and page program ops
  when xSPI profile 1.0 table is defined.
* Bypass zero erase size in spi_nor_find_best_erase_type().
* Fix select_uniform_erase to skip 0 erase size
* Add generic flash driver. If a flash is not found in the flash_info
  array, fall back to the generic flash driver which is described solely
  by the flash's SFDP tables.
* Fix the number of bytes for the dummy cycles in
  spi_nor_spimem_check_readop().
* Introduce SPI_NOR_QUAD_PP flag, as PP_1_1_4 is not SFDP discoverable.

SPI NOR manufacturer drivers changes:
* Spansion:
  - use PARSE_SFDP for s28hs512t,
  - add support for s28hl512t, s28hl01gt, and s28hs01gt.
* Gigadevice: Replace default_init() with post_bfpt() for gd25q256.
* Micron - ST: Enable locking for mt25qu256a.
* Winbond: Add support for W25Q512NW-IQ.
* ISSI: Use PARSE_SFDP and SPI_NOR_QUAD_PP.

Fix merge conflict in the jedec,spi-nor bindings.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
index d76cd3946434..c800621eff95 100644
--- a/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
+++ b/Documentation/ABI/testing/sysfs-bus-spi-devices-spi-nor
@@ -5,6 +5,9 @@ Contact:	linux-mtd@lists.infradead.org
 Description:	(RO) The JEDEC ID of the SPI NOR flash as reported by the
 		flash device.
 
+		The attribute is not present if the flash doesn't support
+		the "Read JEDEC ID" command (9Fh). This is the case for
+		non-JEDEC compliant flashes.
 
 What:		/sys/bus/spi/devices/.../spi-nor/manufacturer
 Date:		April 2021
@@ -12,6 +15,9 @@ KernelVersion:	5.14
 Contact:	linux-mtd@lists.infradead.org
 Description:	(RO) Manufacturer of the SPI NOR flash.
 
+		The attribute is not present if the flash device isn't
+		known to the kernel and is only probed by its SFDP
+		tables.
 
 What:		/sys/bus/spi/devices/.../spi-nor/partname
 Date:		April 2021
diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
index 6cc491083650..3fe981b14e2c 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
@@ -70,10 +70,17 @@ properties:
       be used on such systems, to denote the absence of a reliable reset
       mechanism.
 
+  reset-gpios:
+    description:
+      A GPIO line connected to the RESET (active low) signal of the device.
+      If "broken-flash-reset" is present then having this property does not
+      make any difference.
+
 unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;
@@ -83,6 +90,7 @@ examples:
             reg = <0>;
             spi-max-frequency = <40000000>;
             m25p,fast-read;
+            reset-gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
         };
     };
 ...