[PATCH 1/9] dt-bindings: HID: i2c-hid: Add "panel" property to i2c-hid backed panels

[Douglas Anderson]

As talked about in the patch ("drm/panel: Add a way for other devices
to follow panel state"), touchscreens that are connected to panels are
generally expected to be power sequenced together with the panel
they're attached to. Today, nothing provides information allowing you
to find out that a touchscreen is connected to a panel. Let's add a
phandle for this.

Signed-off-by: Douglas Anderson <dianders at chromium.org>
---

 Documentation/devicetree/bindings/input/elan,ekth6915.yaml  | 6 ++++++
 Documentation/devicetree/bindings/input/goodix,gt7375p.yaml | 6 ++++++
 Documentation/devicetree/bindings/input/hid-over-i2c.yaml   | 6 ++++++
 3 files changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
index 05e6f2df604c..d55b03bd3ec4 100644
--- a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
+++ b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
@@ -24,6 +24,12 @@ properties:
   interrupts:
     maxItems: 1
 
+  panel:
+    description: If this is a touchscreen, the panel it's connected to. This
+      indicates that the panel and touchscreen are expected to be power
+      sequenced together.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
   reset-gpios:
     description: Reset GPIO; not all touchscreens using eKTH6915 hook this up.
 
diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
index ce18d7dadae2..a5cd8dafd450 100644
--- a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
+++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
@@ -30,6 +30,12 @@ properties:
   interrupts:
     maxItems: 1
 
+  panel:
+    description: If this is a touchscreen, the panel it's connected to. This
+      indicates that the panel and touchscreen are expected to be power
+      sequenced together.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
   reset-gpios:
     true
 
diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
index 7156b08f7645..c7ea6c148838 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml
@@ -44,6 +44,12 @@ properties:
     description: HID descriptor address
     $ref: /schemas/types.yaml#/definitions/uint32
 
+  panel:
+    description: If this is a touchscreen, the panel it's connected to. This
+      indicates that the panel and touchscreen are expected to be power
+      sequenced together.
+    $ref: /schemas/types.yaml#/definitions/phandle
+
   post-power-on-delay-ms:
     description: Time required by the device after enabling its regulators
       or powering it on, before it is ready for communication.
-- 
2.40.1.698.g37aff9b760-goog