[PATCH 1/7] dt-bindings: input: touchscreen: samsung,s6sy761: Add S6SY791 and reset GPIO

[Lukas Timmermann]

S6SY791 is the SPI-based counterpart of S6SY761. The register map and
commands are identical for the subset the kernel currently implements.
Therefore add S6SY791 as a related touch controller.

Optionally, the reset line can be controlled on some boards,
such as the Google Pixel 6 Pro (raven).

Also reference spi-peripheral-props for the SPI bus properties.

Signed-off-by: Lukas Timmermann <foss at timmermann.space>
---
 .../input/touchscreen/samsung,s6sy761.yaml         | 37 +++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/samsung,s6sy761.yaml b/Documentation/devicetree/bindings/input/touchscreen/samsung,s6sy761.yaml
index 1ffd17af3c53..d24f35038934 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/samsung,s6sy761.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/samsung,s6sy761.yaml
@@ -8,13 +8,17 @@ title: Samsung S6SY761 touchscreen controller
 
 maintainers:
   - Andi Shyti <andi.shyti at kernel.org>
+  - Lukas Timmermann <foss at timmermann.space>
 
 allOf:
   - $ref: touchscreen.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
 
 properties:
   compatible:
-    const: samsung,s6sy761
+    enum:
+      - samsung,s6sy761
+      - samsung,s6sy791
 
   reg:
     maxItems: 1
@@ -22,9 +26,19 @@ properties:
   interrupts:
     maxItems: 1
 
+  reset-gpios:
+    maxItems: 1
+    description: GPIO connected to the reset pin of the controller
+
   avdd-supply: true
   vdd-supply: true
 
+  spi-max-frequency: true
+
+  spi-cpha: true
+
+  spi-cpol: true
+
 unevaluatedProperties: false
 
 required:
@@ -52,3 +66,24 @@ examples:
             touchscreen-size-y = <4096>;
         };
     };
+
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen at 0 {
+            compatible = "samsung,s6sy791";
+            reg = <0>;
+            spi-max-frequency = <10000000>;
+            spi-cpol;
+            spi-cpha;
+            interrupt-parent = <&gpa9>;
+            interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+            reset-gpios = <&gpp26 0 GPIO_ACTIVE_LOW>;
+            avdd-supply = <&ldo26_reg>;
+            vdd-supply = <&ldo25_reg>;
+        };
+    };

-- 
2.56.0