dt-bindings: pinctrl: mediatek: add support for mt8188
Add the pinctrl header file on MediaTek mt8188. Add the new binding document for pinctrl on MediaTek mt8188. Signed-off-by: Hui.Liu <hui.liu@mediatek.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Link: https://lore.kernel.org/r/20220818075012.20880-2-hui.liu@mediatek.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Hui.Liu
Linus Walleij
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8188-pinctrl.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek MT8188 Pin Controller
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maintainers:
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- Hui Liu <hui.liu@mediatek.com>
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description: |
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The MediaTek's MT8188 Pin controller is used to control SoC pins.
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properties:
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compatible:
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const: mediatek,mt8188-pinctrl
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gpio-controller: true
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'#gpio-cells':
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description: |
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Number of cells in GPIO specifier, should be two. The first cell
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is the pin number, the second cell is used to specify optional
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parameters which are defined in <dt-bindings/gpio/gpio.h>.
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const: 2
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gpio-ranges:
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maxItems: 1
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gpio-line-names: true
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reg:
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items:
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- description: gpio registers base address
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- description: rm group io configuration registers base address
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- description: lt group io configuration registers base address
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- description: lm group io configuration registers base address
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- description: rt group io configuration registers base address
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- description: eint registers base address
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reg-names:
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items:
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- const: iocfg0
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- const: iocfg_rm
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- const: iocfg_lt
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- const: iocfg_lm
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- const: iocfg_rt
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- const: eint
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interrupt-controller: true
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'#interrupt-cells':
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const: 2
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interrupts:
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description: The interrupt outputs to sysirq.
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maxItems: 1
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mediatek,rsel-resistance-in-si-unit:
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type: boolean
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description: |
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We provide two methods to select the resistance for I2C when pull up or pull down.
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The first is by RSEL definition value, another one is by resistance value(ohm).
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This flag is used to identify if the method is resistance(si unit) value.
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# PIN CONFIGURATION NODES
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patternProperties:
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'-pins$':
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type: object
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additionalProperties: false
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patternProperties:
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'^pins':
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type: object
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$ref: "/schemas/pinctrl/pincfg-node.yaml"
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additionalProperties: false
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description: |
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A pinctrl node should contain at least one subnode representing the
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pinctrl groups available on the machine. Each subnode will list the
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pins it needs, and how they should be configured, with regard to muxer
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configuration, pullups, drive strength, input enable/disable and
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input schmitt.
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properties:
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pinmux:
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description: |
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Integer array, represents gpio pin number and mux setting.
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Supported pin number and mux varies for different SoCs, and are
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defined as macros in dt-bindings/pinctrl/mediatek,<soc>-pinfunc.h
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directly.
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drive-strength:
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enum: [2, 4, 6, 8, 10, 12, 14, 16]
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drive-strength-microamp:
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enum: [125, 250, 500, 1000]
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bias-pull-down:
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oneOf:
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- type: boolean
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- enum: [100, 101, 102, 103]
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description: mt8188 pull down PUPD/R0/R1 type define value.
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- enum: [200, 201, 202, 203, 204, 205, 206, 207]
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description: mt8188 pull down RSEL type define value.
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- enum: [75000, 5000]
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description: mt8188 pull down RSEL type si unit value(ohm).
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description: |
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For pull down type is normal, it doesn't need add RSEL & R1R0 define
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and resistance value.
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For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
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set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
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"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"
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define in mt8188.
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For pull down type is RSEL, it can add RSEL define & resistance value(ohm)
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to set different resistance by identifying property "mediatek,rsel-resistance-in-si-unit".
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It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
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& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"
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& "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
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define in mt8188. It can also support resistance value(ohm) "75000" & "5000" in mt8188.
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bias-pull-up:
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oneOf:
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- type: boolean
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- enum: [100, 101, 102, 103]
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description: mt8188 pull up PUPD/R0/R1 type define value.
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- enum: [200, 201, 202, 203, 204, 205, 206, 207]
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description: mt8188 pull up RSEL type define value.
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- enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
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description: mt8188 pull up RSEL type si unit value(ohm).
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description: |
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For pull up type is normal, it don't need add RSEL & R1R0 define
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and resistance value.
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For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
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set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
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"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"
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define in mt8188.
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For pull up type is RSEL, it can add RSEL define & resistance value(ohm)
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to set different resistance by identifying property "mediatek,rsel-resistance-in-si-unit".
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It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
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& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"
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& "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
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define in mt8188. It can also support resistance value(ohm)
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"1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & "75000" in mt8188.
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bias-disable: true
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output-high: true
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output-low: true
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input-enable: true
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input-disable: true
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input-schmitt-enable: true
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input-schmitt-disable: true
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required:
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- pinmux
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required:
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- compatible
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- reg
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- interrupts
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- interrupt-controller
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- '#interrupt-cells'
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- gpio-controller
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- '#gpio-cells'
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- gpio-ranges
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/pinctrl/mediatek,mt8188-pinfunc.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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pio: pinctrl@10005000 {
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compatible = "mediatek,mt8188-pinctrl";
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reg = <0x10005000 0x1000>,
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<0x11c00000 0x1000>,
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<0x11e10000 0x1000>,
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<0x11e20000 0x1000>,
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<0x11ea0000 0x1000>,
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<0x1000b000 0x1000>;
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reg-names = "iocfg0", "iocfg_rm",
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"iocfg_lt", "iocfg_lm", "iocfg_rt",
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"eint";
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gpio-controller;
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#gpio-cells = <2>;
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gpio-ranges = <&pio 0 0 176>;
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interrupt-controller;
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interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>;
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#interrupt-cells = <2>;
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pio-pins {
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pins {
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pinmux = <PINMUX_GPIO0__FUNC_B_GPIO0>;
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output-low;
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};
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};
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spi0-pins {
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pins-spi {
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pinmux = <PINMUX_GPIO75__FUNC_O_SPIM1_CSB>,
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<PINMUX_GPIO76__FUNC_O_SPIM1_CLK>,
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<PINMUX_GPIO77__FUNC_B0_SPIM1_MOSI>;
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drive-strength = <6>;
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};
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pins-spi-mi {
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pinmux = <PINMUX_GPIO78__FUNC_B0_SPIM1_MISO>;
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bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
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};
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};
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i2c0-pins {
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pins {
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pinmux = <PINMUX_GPIO55__FUNC_B1_SCL0>,
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<PINMUX_GPIO56__FUNC_B1_SDA0>;
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bias-disable;
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drive-strength-microamp = <1000>;
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};
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};
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};
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