Add devicetree bindings for Mediatek MT8365 pinctrl driver. Signed-off-by: Bernhard Rosenkränzer <bero@xxxxxxxxxxxx> --- .../pinctrl/mediatek,mt8365-pinctrl.yaml | 197 ++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml new file mode 100644 index 0000000000000..3c0248b48caff --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt8365-pinctrl.yaml @@ -0,0 +1,197 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8365-pinctrl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Mediatek MT8365 Pin Controller + +maintainers: + - Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx> + - Bernhard Rosenkränzer <bero@xxxxxxxxxxxx> + +description: | + The MediaTek's MT8365 Pin controller is used to control SoC pins. + +properties: + compatible: + const: mediatek,mt8365-pinctrl + + reg: + maxItems: 1 + + mediatek,pctl-regmap: + $ref: /schemas/types.yaml#/definitions/phandle-array + items: + maxItems: 1 + minItems: 1 + maxItems: 2 + description: | + Should be phandles of the syscfg node. + + gpio-controller: true + + "#gpio-cells": + const: 2 + description: | + Number of cells in GPIO specifier. Since the generic GPIO + binding is used, the amount of cells must be specified as 2. See the below + mentioned gpio binding representation for description of particular cells. + + interrupt-controller: true + + interrupts: + maxItems: 1 + + "#interrupt-cells": + const: 2 + +patternProperties: + "-pins$": + type: object + additionalProperties: false + patternProperties: + "pins$": + type: object + additionalProperties: false + description: | + A pinctrl node should contain at least one subnode representing the + pinctrl groups available on the machine. Each subnode will list the + pins it needs, and how they should be configured, with regard to muxer + configuration, pullups, drive strength, input enable/disable and input + schmitt. + $ref: /schemas/pinctrl/pincfg-node.yaml + + properties: + pinmux: + description: + integer array, represents gpio pin number and mux setting. + Supported pin number and mux varies for different SoCs, and are + defined as macros in <soc>-pinfunc.h directly. + + bias-disable: true + + bias-pull-up: + description: | + Besides generic pinconfig options, it can be used as the pull up + settings for 2 pull resistors, R0 and R1. User can configure those + special pins. + + bias-pull-down: true + + input-enable: true + + input-disable: true + + output-low: true + + output-high: true + + input-schmitt-enable: true + + input-schmitt-disable: true + + mediatek,drive-strength-adv: + description: | + Describe the specific driving setup property. + For I2C pins, the existing generic driving setup can only support + 2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they + can support 0.125/0.25/0.5/1mA adjustment. If we enable specific + driving setup, the existing generic setup will be disabled. + The specific driving setup is controlled by E1E0EN. + When E1=0/E0=0, the strength is 0.125mA. + When E1=0/E0=1, the strength is 0.25mA. + When E1=1/E0=0, the strength is 0.5mA. + When E1=1/E0=1, the strength is 1mA. + EN is used to enable or disable the specific driving setup. + Valid arguments are described as below: + 0: (E1, E0, EN) = (0, 0, 0) + 1: (E1, E0, EN) = (0, 0, 1) + 2: (E1, E0, EN) = (0, 1, 0) + 3: (E1, E0, EN) = (0, 1, 1) + 4: (E1, E0, EN) = (1, 0, 0) + 5: (E1, E0, EN) = (1, 0, 1) + 6: (E1, E0, EN) = (1, 1, 0) + 7: (E1, E0, EN) = (1, 1, 1) + So the valid arguments are from 0 to 7. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3, 4, 5, 6, 7] + + mediatek,pull-up-adv: + description: | + Pull up setings for 2 pull resistors, R0 and R1. User can + configure those special pins. Valid arguments are described as below: + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled. + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled. + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled. + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] + + mediatek,pull-down-adv: + description: | + Pull down settings for 2 pull resistors, R0 and R1. User can + configure those special pins. Valid arguments are described as below: + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled. + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled. + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled. + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] + + mediatek,tdsel: + description: | + An integer describing the steps for output level shifter duty + cycle when asserted (high pulse width adjustment). Valid arguments + are from 0 to 15. + $ref: /schemas/types.yaml#/definitions/uint32 + + mediatek,rdsel: + description: | + An integer describing the steps for input level shifter duty cycle + when asserted (high pulse width adjustment). Valid arguments are + from 0 to 63. + $ref: /schemas/types.yaml#/definitions/uint32 + + required: + - pinmux + +required: + - compatible + - reg + - gpio-controller + - "#gpio-cells" + +allOf: + - $ref: pinctrl.yaml# + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/pinctrl/mt8365-pinfunc.h> + soc { + #address-cells = <2>; + #size-cells = <2>; + + pio: pinctrl@1000b000 { + compatible = "mediatek,mt8365-pinctrl"; + reg = <0 0x1000b000 0 0x1000>; + mediatek,pctl-regmap = <&syscfg_pctl>; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>; + + pio-pins { + pins { + pinmux = <MT8365_PIN_59_SDA1__FUNC_SDA1_0>, <MT8365_PIN_60_SCL1__FUNC_SCL1_0>; + mediatek,pull-up-adv = <3>; + mediatek,drive-strength-adv = <00>; + bias-pull-up; + }; + }; + }; + }; -- 2.39.0
