Add YAML bindings for MA35D1 SoC keypad. Signed-off-by: mjchen <mjchen0829@xxxxxxxxx> --- .../bindings/input/nuvoton,ma35d1-keypad.yaml | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/nuvoton,ma35d1-keypad.yaml diff --git a/Documentation/devicetree/bindings/input/nuvoton,ma35d1-keypad.yaml b/Documentation/devicetree/bindings/input/nuvoton,ma35d1-keypad.yaml new file mode 100644 index 000000000000..71debafc3890 --- /dev/null +++ b/Documentation/devicetree/bindings/input/nuvoton,ma35d1-keypad.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/nuvoton,ma35d1-keypad.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Nuvoton MA35D1 Keypad + +maintainers: + - Ming-jen Chen <mjchen0829@xxxxxxxxx> + +allOf: + - $ref: /schemas/input/matrix-keymap.yaml# + +properties: + compatible: + const: nuvoton,ma35d1-kpi + + debounce-period: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192] + description: | + Key debounce period select, specified in terms of keypad IP clock cycles. + Valid values include 0 (no debounce) and specific clock cycle values: + 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, and 8192. + + nuvoton,key-scan-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Set the time it takes to scan each key in the keypad, in clock cycles of the IP. + This parameter controls how frequently the keypad is scanned, adjusting the response time. + The valid range is from 1 to 256 clock cycles. + minimum: 1 + maximum: 256 + + nuvoton,key-scan-time-div: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Set a divider that adjusts the scan time for each key. + This value scales the time it takes to scan each key + by multiplying the key-scan-time by the specified factor. + For example, if you set key-scan-time to 64 cycles and configure key-scan-time-div to 2, + the scan time for each key will be increased to 128 cycles (64 cycles * 2). time. + minimum: 1 + maximum: 256 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - clocks + - linux,keymap + - debounce-period + - nuvoton,key-scan-time + - nuvoton,key-scan-time-div + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/input/input.h> + keypad@404A0000 { + compatible = "nuvoton,ma35d1-kpi"; + reg = <0x404A0000 0x10000>; + interrupts = <79>; + clocks = <&clk>; + keypad,num-rows = <2>; + keypad,num-columns = <2>; + + linux,keymap = < + MATRIX_KEY(0, 0, KEY_ENTER) + MATRIX_KEY(0, 1, KEY_ENTER) + MATRIX_KEY(1, 0, KEY_SPACE) + MATRIX_KEY(1, 1, KEY_Z) + >; + + debounce-period = <8>; + nuvoton,key-scan-time = <1>; + nuvoton,key-scan-time-div = <24>; + }; -- 2.25.1
