linux-kernel - [PATCH v3 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property

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Message-ID: <20220908064428.2962-2-sai.krishna.potthuri@amd.com>
Date:   Thu, 8 Sep 2022 12:14:27 +0530
From:   Sai Krishna Potthuri <sai.krishna.potthuri@....com>
To:     Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        "Vignesh Raghavendra" <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>
CC:     <devicetree@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <saikrishna12468@...il.com>,
        <git@....com>, Sai Krishna Potthuri <sai.krishna.potthuri@....com>
Subject: [PATCH v3 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property

SPI-NOR flashes have RESET pin which can be toggled using GPIO
controller, for those platforms reset-gpios property can be used to
reset the flash device.

Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
---
 Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
index 7149784a36ac..8a843b9b8673 100644
--- a/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
+++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
@@ -70,6 +70,12 @@ 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.
+
   partitions:
     type: object
 
@@ -88,6 +94,7 @@ unevaluatedProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
     spi {
         #address-cells = <1>;
         #size-cells = <0>;
@@ -97,6 +104,7 @@ examples:
             reg = <0>;
             spi-max-frequency = <40000000>;
             m25p,fast-read;
+            reset-gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
         };
     };
 ...
-- 
2.17.1