Add dt bindings document for pinmux & GPIO controller driver of Intel Lightning Mountain SoC. Signed-off-by: Rahul Tanwar <rahul.tanwar@xxxxxxxxxxxxxxx> --- .../bindings/pinctrl/intel,lgm-pinctrl.yaml | 116 +++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/intel,lgm-pinctrl.yaml diff --git a/Documentation/devicetree/bindings/pinctrl/intel,lgm-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/intel,lgm-pinctrl.yaml new file mode 100644 index 000000000000..240d429f773b --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/intel,lgm-pinctrl.yaml @@ -0,0 +1,116 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bindings/pinctrl/intel,lgm-pinctrl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Intel Lightning Mountain SoC pinmux & GPIO controller binding + +maintainers: + - Rahul Tanwar <rahul.tanwar@xxxxxxxxxxxxxxx> + +description: | + Pinmux & GPIO controller controls pin multiplexing & configuration including + GPIO function selection & GPIO attributes configuration. + + Please refer to [1] for details of the common pinctrl bindings used by the + client devices. + + [1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt + +properties: + compatible: + const: intel,lgm-io + + reg: + maxItems: 1 + +# Client device subnode's properties +patternProperties: + '-pins$': + type: object + description: + Pinctrl node's client devices use subnodes for desired pin configuration. + Client device subnodes use below standard properties. + + properties: + function: + $ref: /schemas/types.yaml#/definitions/string + description: + A string containing the name of the function to mux to the group. + + groups: + $ref: /schemas/types.yaml#/definitions/string-array + description: + An array of strings identifying the list of groups. + + pins: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + List of pins to select with this function. + + pinmux: + description: The applicable mux group. + allOf: + - $ref: "/schemas/types.yaml#/definitions/uint32-array" + + bias-pull-up: + type: boolean + + bias-pull-down: + type: boolean + + drive-strength: + description: | + Selects the drive strength for the specified pins in mA. + 0: 2 mA + 1: 4 mA + 2: 8 mA + 3: 12 mA + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [0, 1, 2, 3] + + slew-rate: + type: boolean + description: | + Sets slew rate for specified pins. + 0: slow slew + 1: fast slew + + drive-open-drain: + type: boolean + + output-enable: + type: boolean + + required: + - function + - groups + + additionalProperties: false + +required: + - compatible + - reg + +additionalProperties: false + +examples: + # Pinmux controller node + - | + pinctrl: pinctrl@e2880000 { + compatible = "intel,lgm-pinctrl"; + reg = <0xe2880000 0x100000>; + + uart0-pins { + pins = <64>, /* UART_RX0 */ + <65>; /* UART_TX0 */ + function = "CONSOLE_UART0"; + pinmux = <1>, + <1>; + groups = "CONSOLE_UART0"; + }; + }; + +... -- 2.11.0
