[RFC PATCH 1/3] dt-bindings: input: hid-over-spi: add the Surface Pro X touch digitizer

[Tawheed Makhdoomi <_@tawheed.cc>]

The touch and pen digitizer of the Microsoft Surface Pro X (vendor 0x045e,
product 0x0996) is a HID over SPI device, but its firmware implements a
pre-release revision of the protocol (input header version 2, device
descriptor bcdVersion 0x0100) rather than HID over SPI 1.0, so the driver
cannot treat it as a "microsoft,g6-touch-digitizer".

Microsoft does not publish a part number or generation for this
digitizer, so name it after the product it ships in, like the
"microsoft,surface-sam" embedded controller.

Signed-off-by: Tawheed Makhdoomi <_@tawheed.cc>
---
 Documentation/devicetree/bindings/input/hid-over-spi.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/input/hid-over-spi.yaml b/Documentation/devicetree/bindings/input/hid-over-spi.yaml
index bed0746f0..beb7e0922 100644
--- a/Documentation/devicetree/bindings/input/hid-over-spi.yaml
+++ b/Documentation/devicetree/bindings/input/hid-over-spi.yaml
@@ -27,6 +27,7 @@ properties:
   compatible:
     enum:
       - microsoft,g6-touch-digitizer
+      - microsoft,surface-pro-x-touch-digitizer
 
   reg:
     maxItems: 1
-- 
2.43.0