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From: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
To: Tudor Ambarus <tudor.ambarus@microchip.com>,
	Pratyush Yadav <pratyush@kernel.org>,
	Michael Walle <michael@walle.cc>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	"Vignesh Raghavendra" <vigneshr@ti.com>,
	Rob Herring <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>
Cc: <devicetree@vger.kernel.org>, <linux-mtd@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <saikrishna12468@gmail.com>,
	<git@amd.com>,
	Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
Subject: [PATCH v3 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property
Date: Thu, 8 Sep 2022 12:14:27 +0530	[thread overview]
Message-ID: <20220908064428.2962-2-sai.krishna.potthuri@amd.com> (raw)
In-Reply-To: <20220908064428.2962-1-sai.krishna.potthuri@amd.com>

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@amd.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


  reply	other threads:[~2022-09-08  6:47 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-08  6:44 [PATCH v3 0/2] mtd: spi-nor: Add flash device reset support Sai Krishna Potthuri
2022-09-08  6:44 ` Sai Krishna Potthuri [this message]
2022-09-08 11:05   ` [PATCH v3 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property Krzysztof Kozlowski
2022-09-08  6:44 ` [PATCH v3 2/2] mtd: spi-nor: Add support for flash reset Sai Krishna Potthuri
2022-10-03  9:43   ` Tudor.Ambarus
2022-10-03 10:06     ` Potthuri, Sai Krishna
2022-10-05  5:48       ` Tudor.Ambarus
2022-10-25  2:32 ` [PATCH v3 0/2] mtd: spi-nor: Add flash device reset support Tudor Ambarus
2022-10-25  2:40   ` Tudor Ambarus

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