dt-bindings: pinctrl: mt8195: add wrapping node of pin configurations
On mt8195, the pinctrl node has pinctrl groups to group pin configurations by users' need. In each pinctrl group, it has subnode(s) to list pins needed and pin configurations. By supporting multiple subnodes, we can configure different pin characteristics (driving/pull-up/pull-down/etc.) in a pinctrl group. Update pinctrl-mt8195.yaml to add subnode in pinctrl groups and an example to illustrate the usage. Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20211220121825.6446-4-tinghan.shen@mediatek.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Tinghan Shen
Linus Walleij
parent
c8eefdbfa1
commit
79dcd4e840
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@ -55,137 +55,159 @@ properties:
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Identifying i2c pins pull up/down type which is RSEL. It can support
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RSEL define or si unit value(ohm) to set different resistance.
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#PIN CONFIGURATION NODES
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# PIN CONFIGURATION NODES
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patternProperties:
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'-pins$':
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type: object
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description: |
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A pinctrl node should contain at least one subnodes representing the
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pinctrl groups available on the machine. Each subnode will list the
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pins it needs, and how they should be configured, with regard to muxer
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configuration, pullups, drive strength, input enable/disable and
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input schmitt.
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An example of using macro:
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pincontroller {
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/* GPIO0 set as multifunction GPIO0 */
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gpio_pin {
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pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
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};
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/* GPIO8 set as multifunction SDA0 */
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i2c0_pin {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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};
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};
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$ref: "pinmux-node.yaml"
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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 defined
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as macros in dt-bindings/pinctrl/<soc>-pinfunc.h directly.
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drive-strength:
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enum: [2, 4, 6, 8, 10, 12, 14, 16]
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bias-pull-down:
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description: |
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For pull down type is normal, it don'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 mt8195.
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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 mt8195. It can also support resistance value(ohm) "75000" & "5000" in mt8195.
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oneOf:
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- enum: [100, 101, 102, 103]
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- description: mt8195 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: mt8195 pull down RSEL type define value.
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- enum: [75000, 5000]
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- description: mt8195 pull down RSEL type si unit value(ohm).
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An example of using RSEL define:
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pincontroller {
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i2c0_pin {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-down = <MTK_PULL_SET_RSEL_001>;
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};
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};
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An example of using si unit resistance value(ohm):
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&pio {
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mediatek,rsel_resistance_in_si_unit;
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}
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pincontroller {
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i2c0_pin {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-down = <75000>;
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};
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};
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bias-pull-up:
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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 mt8195.
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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 mt8195. It can also support resistance value(ohm)
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"1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & "75000" in mt8195.
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oneOf:
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- enum: [100, 101, 102, 103]
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- description: mt8195 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: mt8195 pull up RSEL type define value.
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- enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
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- description: mt8195 pull up RSEL type si unit value(ohm).
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An example of using RSEL define:
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pincontroller {
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i2c0_pin {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-up = <MTK_PULL_SET_RSEL_001>;
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};
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};
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An example of using si unit resistance value(ohm):
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&pio {
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mediatek,rsel_resistance_in_si_unit;
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}
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pincontroller {
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i2c0_pin {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-up = <1000>;
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};
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};
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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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patternProperties:
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'^pins':
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type: object
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additionalProperties: false
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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
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input schmitt.
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An example of using macro:
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pincontroller {
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/* GPIO0 set as multifunction GPIO0 */
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gpio-pins {
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pins {
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pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
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}
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};
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/* GPIO8 set as multifunction SDA0 */
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i2c0-pins {
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pins {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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}
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};
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};
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$ref: "pinmux-node.yaml"
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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/<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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bias-pull-down:
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description: |
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For pull down type is normal, it don'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" &
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"MTK_PUPD_SET_R1R0_11" define in mt8195.
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For pull down type is RSEL, it can add RSEL define & resistance
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value(ohm) to set different resistance by identifying property
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"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"
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& "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
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& "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
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define in mt8195. It can also support resistance value(ohm)
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"75000" & "5000" in mt8195.
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oneOf:
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- enum: [100, 101, 102, 103]
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- description: mt8195 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: mt8195 pull down RSEL type define value.
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- enum: [75000, 5000]
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- description: mt8195 pull down RSEL type si unit value(ohm).
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An example of using RSEL define:
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pincontroller {
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i2c0_pin {
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pins {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-down = <MTK_PULL_SET_RSEL_001>;
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}
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};
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};
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An example of using si unit resistance value(ohm):
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&pio {
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mediatek,rsel_resistance_in_si_unit;
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}
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pincontroller {
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i2c0_pin {
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pins {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-down = <75000>;
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}
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};
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};
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bias-pull-up:
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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" &
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"MTK_PUPD_SET_R1R0_11" define in mt8195.
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For pull up type is RSEL, it can add RSEL define & resistance
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value(ohm) to set different resistance by identifying property
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"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"
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& "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
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& "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
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define in mt8195. It can also support resistance value(ohm)
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"1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" &
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"75000" in mt8195.
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oneOf:
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- enum: [100, 101, 102, 103]
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- description: mt8195 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: mt8195 pull up RSEL type define value.
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- enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
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- description: mt8195 pull up RSEL type si unit value(ohm).
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An example of using RSEL define:
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pincontroller {
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i2c0-pins {
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pins {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-up = <MTK_PULL_SET_RSEL_001>;
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}
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};
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};
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An example of using si unit resistance value(ohm):
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&pio {
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mediatek,rsel_resistance_in_si_unit;
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}
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pincontroller {
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i2c0-pins {
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pins {
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pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
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bias-pull-up = <1000>;
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}
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};
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};
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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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allOf:
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- $ref: "pinctrl.yaml#"
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@ -204,30 +226,46 @@ additionalProperties: false
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examples:
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- |
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#include <dt-bindings/pinctrl/mt8195-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,mt8195-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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<0x11e20000 0x1000>,
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<0x11eb0000 0x1000>,
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<0x11f40000 0x1000>,
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<0x1000b000 0x1000>;
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reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
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"iocfg_br", "iocfg_lm", "iocfg_rb",
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"iocfg_tl", "eint";
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gpio-controller;
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#gpio-cells = <2>;
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gpio-ranges = <&pio 0 0 144>;
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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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#include <dt-bindings/pinctrl/mt8195-pinfunc.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#
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pio: pinctrl@10005000 {
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compatible = "mediatek,mt8195-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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<0x11e20000 0x1000>,
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<0x11eb0000 0x1000>,
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<0x11f40000 0x1000>,
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<0x1000b000 0x1000>;
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reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
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"iocfg_br", "iocfg_lm", "iocfg_rb",
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"iocfg_tl", "eint";
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gpio-controller;
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#gpio-cells = <2>;
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gpio-ranges = <&pio 0 0 144>;
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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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pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
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output-low;
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};
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};
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pio-pins {
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pins {
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pinmux = <PINMUX_GPIO0__FUNC_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_GPIO132__FUNC_SPIM0_CSB>,
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<PINMUX_GPIO134__FUNC_SPIM0_MO>,
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<PINMUX_GPIO133__FUNC_SPIM0_CLK>;
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bias-disable;
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};
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pins-spi-mi {
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pinmux = <PINMUX_GPIO135__FUNC_SPIM0_MI>;
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bias-pull-down;
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};
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};
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};
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