[PATCH RESEND v6 1/4] dt-bindings: input: touchscreen: Add Z2 controller

Sasha Finkelstein via B4 Relay
2025-02-17T11:38:16Z

From: Sasha Finkelstein <fnkl.kernel@gmail.com>

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

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
---
.../input/touchscreen/apple,z2-multitouch.yaml | 70 ++++++++++++++++++++++
1 file changed, 70 insertions(+)

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..402ca6bffd3473a1a889ced7890e9836e6a76e45
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
@@ -0,0 +1,70 @@
+# 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 <fnkl.kernel@gmail.com>
+
+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
+ maxItems: 4096
+ 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>;
+ };
+ };
+
+...

--
2.48.1