linux-kernel - [PATCH 1/2] dt-bindings: cros-ec: Add properties for GPIO controller

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Date: Mon, 19 Feb 2024 12:23:23 -0800
From: Stephen Boyd <swboyd@...omium.org>
To: Lee Jones <lee@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	devicetree@...r.kernel.org,
	chrome-platform@...ts.linux.dev,
	Douglas Anderson <dianders@...omium.org>,
	Pin-yen Lin <treapking@...omium.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Benson Leung <bleung@...omium.org>,
	Guenter Roeck <groeck@...omium.org>
Subject: [PATCH 1/2] dt-bindings: cros-ec: Add properties for GPIO controller

The ChromeOS embedded controller (EC) supports setting the state of
GPIOs when the system is unlocked, and getting the state of GPIOs in all
cases. The GPIOs are on the EC itself, so the EC acts similar to a GPIO
expander. Add the #gpio-cells and gpio-controller properties to the
cros-ec binding so that other devices described in DT can get the GPIOs
on the EC.

Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: Lee Jones <lee@...nel.org>
Cc: Benson Leung <bleung@...omium.org>
Cc: Guenter Roeck <groeck@...omium.org>
Cc: <devicetree@...r.kernel.org>
Cc: <chrome-platform@...ts.linux.dev>
Cc: Pin-yen Lin <treapking@...omium.org>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 Documentation/devicetree/bindings/mfd/google,cros-ec.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
index e1ca4f297c6d..aac8819bd00b 100644
--- a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
+++ b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
@@ -93,6 +93,11 @@ properties:
   '#size-cells':
     const: 0
 
+  '#gpio-cells':
+    const: 2
+
+  gpio-controller: true
+
   typec:
     $ref: /schemas/chrome/google,cros-ec-typec.yaml#
 
@@ -275,6 +280,8 @@ examples:
             interrupts = <99 0>;
             interrupt-parent = <&gpio7>;
             spi-max-frequency = <5000000>;
+            #gpio-cells = <2>;
+            gpio-controller;
 
             proximity {
                 compatible = "google,cros-ec-mkbp-proximity";
-- 
https://chromeos.dev