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author | Zhiyong Tao <zhiyong.tao@mediatek.com> | 2020-08-17 03:17:01 +0300 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2020-08-27 11:50:49 +0300 |
commit | d2f2f1321c194479c32ac13843a9299568da9304 (patch) | |
tree | c121090f4d6bd191827b7be36ab82621e84d9dd3 /Documentation/devicetree/bindings/pinctrl | |
parent | 7c81b7199b79e053db7b909e667f2a88e6c437b0 (diff) | |
download | linux-d2f2f1321c194479c32ac13843a9299568da9304.tar.xz |
dt-bindings: pinctrl: mt8192: add binding document
The commit adds mt8192 compatible node in binding document.
Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200817001702.1646-3-zhiyong.tao@mediatek.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl')
-rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml new file mode 100644 index 000000000000..5556def6b99b --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml @@ -0,0 +1,155 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8192.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Mediatek MT8192 Pin Controller + +maintainers: + - Sean Wang <sean.wang@mediatek.com> + +description: | + The Mediatek's Pin controller is used to control SoC pins. + +properties: + compatible: + const: mediatek,mt8192-pinctrl + + gpio-controller: true + + '#gpio-cells': + 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. + const: 2 + + gpio-ranges: + description: gpio valid number range. + maxItems: 1 + + reg: + description: | + Physical address base for gpio base registers. There are 11 GPIO + physical address base in mt8192. + maxItems: 11 + + reg-names: + description: | + Gpio base register names. + maxItems: 11 + + interrupt-controller: true + + '#interrupt-cells': + const: 2 + + interrupts: + description: The interrupt outputs to sysirq. + maxItems: 1 + +#PIN CONFIGURATION NODES +patternProperties: + '^pins': + type: object + description: | + A pinctrl node should contain at least one subnodes 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. + An example of using macro: + pincontroller { + /* GPIO0 set as multifunction GPIO0 */ + state_0_node_a { + pinmux = <PINMUX_GPIO0__FUNC_GPIO0>; + }; + /* GPIO1 set as multifunction PWM */ + state_0_node_b { + pinmux = <PINMUX_GPIO1__FUNC_PWM_1>; + }; + }; + $ref: "pinmux-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 dt-bindings/pinctrl/<soc>-pinfunc.h directly. + + drive-strength: + description: | + It can support some arguments, such as MTK_DRIVE_4mA, MTK_DRIVE_6mA, etc. See + dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192. + enum: [2, 4, 6, 8, 10, 12, 14, 16] + + bias-pull-down: true + + bias-pull-up: true + + bias-disable: true + + output-high: true + + output-low: true + + input-enable: true + + input-disable: true + + input-schmitt-enable: true + + input-schmitt-disable: true + + required: + - pinmux + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - interrupt-controller + - '#interrupt-cells' + - gpio-controller + - '#gpio-cells' + - gpio-ranges + +additionalProperties: false + +examples: + - | + #include <dt-bindings/pinctrl/mt8192-pinfunc.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + pio: pinctrl@10005000 { + compatible = "mediatek,mt8192-pinctrl"; + reg = <0x10005000 0x1000>, + <0x11c20000 0x1000>, + <0x11d10000 0x1000>, + <0x11d30000 0x1000>, + <0x11d40000 0x1000>, + <0x11e20000 0x1000>, + <0x11e70000 0x1000>, + <0x11ea0000 0x1000>, + <0x11f20000 0x1000>, + <0x11f30000 0x1000>, + <0x1000b000 0x1000>; + reg-names = "iocfg0", "iocfg_rm", "iocfg_bm", + "iocfg_bl", "iocfg_br", "iocfg_lm", + "iocfg_lb", "iocfg_rt", "iocfg_lt", + "iocfg_tl", "eint"; + gpio-controller; + #gpio-cells = <2>; + gpio-ranges = <&pio 0 0 220>; + interrupt-controller; + interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH 0>; + #interrupt-cells = <2>; + + pins { + pinmux = <PINMUX_GPIO0__FUNC_GPIO0>; + output-low; + }; + }; |