diff --git a/Documentation/devicetree/bindings/pinctrl/starfive,jhb100-per1-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/starfive,jhb100-per1-pinctrl.yaml new file mode 100644 index 000000000000..932dcc8ace85 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/starfive,jhb100-per1-pinctrl.yaml @@ -0,0 +1,178 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/starfive,jhb100-per1-pinctrl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: StarFive JHB100 Peripheral-1 Pin Controller + +description: | + Pinctrl bindings for JHB100 RISC-V SoC from StarFive Technology Ltd. + + The JHB100 SoC has 13 pinctrl domains - sys0, sys0h, sys1, sys2, per0, per1, + per2, per2pok, per3, adc0, adc1, emmc, and vga. + This document provides an overview of the "per1" pinctrl domain. + + The "per1" domain has a pin controller which provides + - function selection for GPIO pads. + - GPIO pad configuration. + - GPIO interrupt handling. + + In the Peripheral-1 Pin Controller, there are 36 multi-function GPIO_PADs. + Each of them can be multiplexed to several peripherals through function + selection. Each iopad has a maximum of up to 3 functions - 0, 1, and 2. + Function 0 is the default function which is generally the GPIO function. + Function 1 and 2 are the alternate functions or peripheral signals that + can be routed to the iopad. The function selection can be carried out by + writing the function number to the iopad function select register. + + Each iopad is configurable with parameters such as input-enable, internal + pull-up/pull-down bias, drive strength, schmitt trigger, slew rate, input + debounce nanoseconds, power source and drive type (open-drain or push-pull). + +maintainers: + - Changhuang Liang + +properties: + compatible: + items: + - const: starfive,jhb100-per1-pinctrl + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + interrupts: + maxItems: 1 + + interrupt-controller: true + + '#interrupt-cells': + const: 2 + + gpio-controller: true + + '#gpio-cells': + const: 2 + + gpio-ranges: true + + gpio-line-names: true + +patternProperties: + '-grp$': + type: object + additionalProperties: false + patternProperties: + '-pins$': + type: object + description: | + A pinctrl node should contain at least one subnode representing the + pinctrl groups available in the domain. Each subnode will list the + pins it needs, and how they should be configured, with regard to + function selection, bias, input enable/disable, input schmitt + trigger enable/disable, slew-rate, input debounce nanoseconds, + drive-open-drain, drive-push-pull, power-source and drive-strength. + allOf: + - $ref: /schemas/pinctrl/pincfg-node.yaml + - $ref: /schemas/pinctrl/pinmux-node.yaml + additionalProperties: false + + properties: + pins: + description: + The list of IOs that properties in the pincfg node apply to. + + function: + description: + A string containing the name of the function to mux for these + pins. + enum: [ gpio, i2c, sfc, sgpio, spi ] + + bias-disable: true + + bias-pull-down: + type: boolean + + bias-pull-up: + oneOf: + - type: boolean + - enum: [ 600, 900, 1200, 2000 ] + description: Pull up RSEL type resistance values (in ohms) + description: + For normal pull up type there is no need to specify a resistance + value, hence this can be specified as a boolean property. + For RSEL pull up type a resistance value (in ohms) can be added. + + drive-open-drain: true + + drive-push-pull: true + + drive-strength: + enum: [ 2, 4, 8, 12 ] + + drive-strength-microamp: + enum: [ 2000, 4000, 8000, 12000 ] + + input-debounce-ns: + minimum: 0 + maximum: 10485680 + description: + Debounce time in nanoseconds. The hardware counts in 80 ns + stages with a 17-bit counter, so the maximum is 10485680 ns. + + input-disable: true + + input-enable: true + + input-schmitt-enable: true + + input-schmitt-disable: true + + power-source: + enum: [ 1800, 3300 ] + description: I/O voltage in millivolt. + + slew-rate: + enum: [ 0, 1 ] + default: 0 + description: | + 0: slow + 1: fast + +required: + - compatible + - reg + - resets + - interrupts + - interrupt-controller + - '#interrupt-cells' + - gpio-controller + - '#gpio-cells' + - gpio-ranges + +additionalProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + pinctrl_per1: pinctrl@11b42000 { + compatible = "starfive,jhb100-per1-pinctrl"; + reg = <0x0 0x11b42000 0x0 0x800>; + resets = <&per1crg 0>; + interrupts = <61>; + interrupt-controller; + #interrupt-cells = <2>; + gpio-controller; + #gpio-cells = <2>; + gpio-ranges = <&pinctrl_per1 0 0 36>; + }; + };