diff mbox series

[v8,2/4] dt-bindings: input: Add Cypress TT2100 touchscreen controller

Message ID 20220802125827.34509-3-alistair@alistair23.me
State Accepted
Commit cdb51323360c9d3cc33831a2eb3ea75b967985af
Headers show
Series Add support for the Cypress cyttsp5 | expand

Commit Message

Alistair Aug. 2, 2022, 12:58 p.m. UTC 
Add the Cypress TrueTouch Generation 5 touchscreen device tree bindings
documentation. It can use I2C or SPI bus.
This touchscreen can handle some defined zone that are designed and
sent as button. To be able to customize the keycode sent, the
"linux,code" property in a "button" sub-node can be used.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../input/touchscreen/cypress,tt21000.yaml    | 101 ++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml
new file mode 100644
index 000000000000..3fc4b7011040
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml
@@ -0,0 +1,101 @@ 
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/cypress,tt21000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cypress TT2100 touchscreen controller
+
+description: The Cypress TT2100 series (also known as "CYTTSP5" after
+  the marketing name Cypress TrueTouch Standard Product series 5).
+
+maintainers:
+  - Alistair Francis <alistair@alistair23.me>
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+properties:
+  compatible:
+    const: cypress,tt21000
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator for voltage.
+
+  reset-gpios:
+    maxItems: 1
+
+  linux,keycodes:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: EV_ABS specific event code generated by the axis.
+
+patternProperties:
+  "^button@[0-9]+$":
+    type: object
+    properties:
+      reg:
+        maxItems: 1
+      linux,keycodes:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Keycode to emit
+
+    required:
+      - reg
+      - linux,keycodes
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - vdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/input/linux-event-codes.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@24 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            compatible = "cypress,tt21000";
+            reg = <0x24>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&tp_reset_ds203>;
+            interrupt-parent = <&pio>;
+            interrupts = <1 5 IRQ_TYPE_LEVEL_LOW>;
+            reset-gpios = <&pio 7 1 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&reg_touch>;
+
+            button@0 {
+                reg = <0>;
+                linux,keycodes = <KEY_HOMEPAGE>;
+            };
+
+            button@1 {
+                reg = <1>;
+                linux,keycodes = <KEY_MENU>;
+            };
+
+            button@2 {
+                reg = <2>;
+                linux,keycodes = <KEY_BACK>;
+            };
+        };
+    };
+...