linux-kernel - [PATCH v3 1/2] dt-bindings: media: imx335: Add reset-gpios to the DT example

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Message-Id: <20240731-imx335-gpio-v3-1-443bfa6ce864@ideasonboard.com>
Date: Wed, 31 Jul 2024 12:32:41 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 "Paul J. Murphy" <paul.j.murphy@...el.com>, 
 Daniele Alessandrelli <daniele.alessandrelli@...el.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Martina Krasteva <martinax.krasteva@...el.com>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, 
 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, 
 Kieran Bingham <kieran.bingham@...asonboard.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Umang Jain <umang.jain@...asonboard.com>
Subject: [PATCH v3 1/2] dt-bindings: media: imx335: Add reset-gpios to the
 DT example

It's easy to get the polarity of GPIOs in the device tree wrong, as
shown by a recently fixed bug in the imx335 driver. To lower the chance
of future mistakes, especially in new bindings that would take the
imx335 binding as a starting point, add the reset-gpios property to the
DT example. This showcases the correct polarity of the XCLR signal for
Sony sensors in the most common case of the signal not being inverted on
the board.

Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
---
 Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml b/Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml
index 106c36ee966d..77bf3a4ee89d 100644
--- a/Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/sony,imx335.yaml
@@ -75,6 +75,8 @@ additionalProperties: false

 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
+
     i2c {
         #address-cells = <1>;
         #size-cells = <0>;
@@ -92,6 +94,8 @@ examples:
             ovdd-supply = <&camera_vddo_1v8>;
             dvdd-supply = <&camera_vddd_1v2>;

+            reset-gpios = <&gpio 50 GPIO_ACTIVE_LOW>;
+
             port {
                 imx335: endpoint {
                     remote-endpoint = <&cam>;

-- 
2.45.0