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dt-bindings: pinctrl: mediatek: Document MT6878 pin controller bindings
Add device-tree bindings for the pin controller and the EINT controller found in the MediaTek MT6878 SoC. Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Igor Belwon
Linus Walleij
parent
3a86608788
commit
d8d357b8a5
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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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$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6878-pinctrl.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek MT6878 Pin Controller
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maintainers:
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- AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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- Igor Belwon <igor.belwon@mentallysanemainliners.org>
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description:
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The MediaTek MT6878 Pin controller is used to control SoC pins.
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properties:
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compatible:
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const: mediatek,mt6878-pinctrl
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reg:
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items:
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- description: pin controller base
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- description: bl group IO
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- description: bm group IO
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- description: br group IO
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- description: bl1 group IO
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- description: br1 group IO
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- description: lm group IO
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- description: lt group IO
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- description: rm group IO
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- description: rt group IO
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- description: EINT controller E block
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- description: EINT controller S block
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- description: EINT controller W block
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- description: EINT controller C block
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reg-names:
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items:
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- const: base
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- const: bl
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- const: bm
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- const: br
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- const: bl1
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- const: br1
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- const: lm
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- const: lt
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- const: rm
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- const: rt
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- const: eint-e
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- const: eint-s
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- const: eint-w
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- const: eint-c
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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. Since the generic GPIO binding is used,
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the amount of cells must be specified as 2. See the below mentioned gpio
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binding representation for description of particular cells.
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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:
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maxItems: 216
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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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interrupt-controller: true
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'#interrupt-cells':
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const: 2
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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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allOf:
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- $ref: /schemas/pinctrl/pincfg-node.yaml
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- $ref: /schemas/pinctrl/pinmux-node.yaml
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description:
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A pinctrl node should contain at least one subnodes 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 input
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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 are defined as macros in
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arch/arm64/boot/dts/mediatek/mt8196-pinfunc.h for this SoC.
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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: [75000, 5000]
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description: Pull down RSEL type resistance values (in ohms)
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description:
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For normal pull down type there is no need to specify a resistance
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value, hence this can be specified as a boolean property.
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For RSEL pull down type a resistance value (in ohms) can be added.
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bias-pull-up:
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oneOf:
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- type: boolean
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- enum: [10000, 5000, 4000, 3000]
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description: Pull up RSEL type resistance values (in ohms)
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description:
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For normal pull up type there is no need to specify a resistance
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value, hence this can be specified as a boolean property.
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For RSEL pull up type a resistance value (in ohms) can be added.
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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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additionalProperties: false
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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/interrupt-controller/arm-gic.h>
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#include <dt-bindings/pinctrl/mt65xx.h>
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#define PINMUX_GPIO0__FUNC_GPIO0 (MTK_PIN_NO(0) | 0)
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#define PINMUX_GPIO99__FUNC_SCL0 (MTK_PIN_NO(99) | 1)
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#define PINMUX_GPIO100__FUNC_SDA0 (MTK_PIN_NO(100) | 1)
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pio: pinctrl@10005000 {
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compatible = "mediatek,mt6878-pinctrl";
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reg = <0x10005000 0x1000>,
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<0x11d10000 0x1000>,
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<0x11d30000 0x1000>,
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<0x11d40000 0x1000>,
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<0x11d50000 0x1000>,
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<0x11d60000 0x1000>,
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<0x11e20000 0x1000>,
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<0x11e30000 0x1000>,
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<0x11eb0000 0x1000>,
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<0x11ec0000 0x1000>,
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<0x11ce0000 0x1000>,
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<0x11de0000 0x1000>,
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<0x11e60000 0x1000>,
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<0x1c01e000 0x1000>;
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reg-names = "base", "bl", "bm", "br", "bl1", "br1",
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"lm", "lt", "rm", "rt", "eint-e", "eint-s",
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"eint-w", "eint-c";
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gpio-controller;
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#gpio-cells = <2>;
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gpio-ranges = <&pio 0 0 220>;
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interrupt-controller;
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interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH 0>;
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#interrupt-cells = <2>;
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gpio-pins {
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pins {
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pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
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bias-pull-up = <4000>;
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drive-strength = <6>;
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};
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};
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i2c0-pins {
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pins-bus {
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pinmux = <PINMUX_GPIO99__FUNC_SCL0>,
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<PINMUX_GPIO100__FUNC_SDA0>;
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bias-pull-down = <75000>;
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drive-strength-microamp = <1000>;
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};
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};
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};
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