[v2,1/4] dt-bindings: input: touchscreen: Add Z2 controller

Commit Message

Sasha Finkelstein via B4 Relay Nov. 28, 2024, 10:29 p.m. UTC

From: Sasha Finkelstein <[e-mail]>

Add bindings for touchscreen controllers attached using the Z2 protocol.
Those are present in most Apple devices.

Signed-off-by: Sasha Finkelstein <[e-mail]>
---
 .../input/touchscreen/apple,z2-multitouch.yaml     | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml b/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..c4c0b41178728d5e0a782979d6eecd32e0a83618
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
@@ -0,0 +1,69 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/apple,z2-multitouch.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple touchscreens attached using the Z2 protocol
+
+maintainers:
+  - Sasha Finkelstein <[e-mail]>
+
+description: A series of touschscreen controllers used in Apple products
+
+allOf:
+  - $ref: touchscreen.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    enum:
+      - apple,j293-touchbar
+      - apple,j493-touchbar
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  firmware-name:
+    maxItems: 1
+
+  apple,z2-cal-blob:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    description:
+      Calibration blob supplied by the bootloader
+
+required:
+  - compatible
+  - interrupts
+  - reset-gpios
+  - firmware-name
+  - touchscreen-size-x
+  - touchscreen-size-y
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@0 {
+            compatible = "apple,j293-touchbar";
+            reg = <0>;
+            spi-max-frequency = <11500000>;
+            reset-gpios = <&pinctrl_ap 139 GPIO_ACTIVE_LOW>;
+            interrupts-extended = <&pinctrl_ap 194 IRQ_TYPE_EDGE_FALLING>;
+            firmware-name = "apple/dfrmtfw-j293.bin";
+            touchscreen-size-x = <23045>;
+            touchscreen-size-y = <640>;
+        };
+    };
+
+...