Re: [PATCH 1/2 v1] dt-bindings: touchscreen: Add CY8CTMA140 bindings
From: Rob Herring <robh@kernel.org>
Date: 2020-03-23 21:32:41
Also in:
linux-devicetree
On Tue, Mar 10, 2020 at 03:28:17PM +0100, Linus Walleij wrote:
quoted hunk ↗ jump to hunk
This adds device tree bindings for the Cypress CY8CTMA140 touchscreen. Cc: devicetree@vger.kernel.org Cc: Ferruh Yigit <redacted> Cc: Henrik Rydberg <rydberg@bitmath.org> Signed-off-by: Linus Walleij <redacted> --- .../input/touchscreen/cypress,cy8ctma140.yaml | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yamldiff --git a/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml b/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml new file mode 100644 index 000000000000..66b488e48b74 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma140.yaml@@ -0,0 +1,72 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/touchscreen/cypress,cy8ctma140.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Cypress CY8CTMA140 series touchscreen controller bindings + +maintainers: + - Linus Walleij <linus.walleij@linaro.org> + +allOf: + - $ref: touchscreen.yaml# + +properties: + compatible: + const: cypress,cy8ctma140 + + reg: + description: I2C client address, defined by hardware
Can drop this. That's every 'reg'.
+ const: 0x20 + + clock-frequency: + description: I2C client max frequency, defined by hardware + const: 400000
What if I have a board which can't do 400k? Perhaps 'maximum: 400000' instead. With that, Reviewed-by: Rob Herring <robh@kernel.org>
+
+ interrupts:
+ maxItems: 1
+
+ vcpin-supply:
+ description: Analog power supply regulator on VCPIN pin
+
+ vdd-supply:
+ description: Digital power supply regulator on VDD pin
+
+ touchscreen-inverted-x: true
+ touchscreen-inverted-y: true
+ touchscreen-size-x: true
+ touchscreen-size-y: true
+ touchscreen-swapped-x-y: true
+ touchscreen-max-pressure: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - touchscreen-size-x
+ - touchscreen-size-y
+ - touchscreen-max-pressure
+
+examples:
+- |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c@00000000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ touchscreen@20 {
+ compatible = "cypress,cy8ctma140";
+ reg = <0x20>;
+ touchscreen-size-x = <480>;
+ touchscreen-size-y = <800>;
+ touchscreen-max-pressure = <255>;
+ interrupt-parent = <&gpio6>;
+ interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+ vdd-supply = <&ab8500_ldo_aux2_reg>;
+ vcpin-supply = <&ab8500_ldo_aux2_reg>;
+ };
+ };
+
+...
--
2.21.1