dt-bindings: mfd: 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.

Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240219202325.4095816-2-swboyd@chromium.org
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
index e1ca4f297c6d818f528ed1aec779c6687f85e40b..aac8819bd00ba49ca40f4a27cc47c7d2a8cc817f 100644 (file)
--- 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";