[PATCH v2 1/2] dt-bindings: input: gpio-keys: add pinctrl states

[Kendall Willis <k-willis@ti.com>]

Document pinctrl properties on the gpio-keys device node. The default
pinctrl state describes the default pin configuration. The wakeup state
configures pins to be able to wakeup the system from suspend if GPIO is a
wakeup source.

The pinctrl sleep state is not defined here despite being used to configure
pins for system suspend to save power. It is not defined since no
gpio-key device tree nodes utilize it. If the sleep state was added, a
device could use both the wakeup state and sleep state. The sleep state
would be entered upon suspend when wakeup is disabled for the device,
whereas the wakeup state would be entered upon suspend if wakeup is enabled
for the device. For now only the wakeup state is defined since it is
used specifically to enable pin configurations that can wakeup the
system from suspend.

Signed-off-by: Kendall Willis <k-willis@ti.com>
---
 Documentation/devicetree/bindings/input/gpio-keys.yaml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/gpio-keys.yaml b/Documentation/devicetree/bindings/input/gpio-keys.yaml
index cc78c2152921308fe0cad3e29ca78a5fad08f066..a0712fba45845e42ca63489354e0cae87de2143f 100644
--- a/Documentation/devicetree/bindings/input/gpio-keys.yaml
+++ b/Documentation/devicetree/bindings/input/gpio-keys.yaml
@@ -22,6 +22,22 @@ properties:
 
   poll-interval: true
 
+  pinctrl-0:
+    description: Default pinctrl state
+
+  pinctrl-1:
+    description: Wakeup pinctrl state
+
+  pinctrl-names:
+    description:
+      When present should contain at least "default" describing the default pin
+      states. The "wakeup" state describes the pin state used to wakeup the system
+      when wakeup is enabled and the system is suspended.
+    minItems: 1
+    items:
+      - const: default
+      - const: wakeup
+
 patternProperties:
   "^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switch))$":
     $ref: input.yaml#

-- 
2.34.1