On Sun, Dec 12, 2021 at 04:40:13AM +0800, Tinghan Shen wrote:
> The mt8195 pinctrl driver requires a 'pins' subnode to wrap pin properties.
Why?
> Signed-off-by: Tinghan Shen <tinghan.shen@xxxxxxxxxxxx>
> ---
> .../bindings/pinctrl/pinctrl-mt8195.yaml | 307 +++++++++---------
> 1 file changed, 160 insertions(+), 147 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> index 5e2bb2bf3a55..2035bf164740 100644
> --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> @@ -59,133 +59,143 @@ properties:
> 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 */
> - gpio_pin {
> - pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> - };
> - /* GPIO8 set as multifunction SDA0 */
> - i2c0_pin {
> - pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> - };
> - };
> - $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:
> - enum: [2, 4, 6, 8, 10, 12, 14, 16]
> -
> - bias-pull-down:
> - description: |
> - For pull down type is normal, it don't need add RSEL & R1R0 define
> - and resistance value.
> - For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
> - set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
> - "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"
> - define in mt8195.
> - For pull down type is RSEL, it can add RSEL define & resistance value(ohm)
> - to set different resistance by identifying property "mediatek,rsel_resistance_in_si_unit".
> - It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
> - & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"
> - & "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
> - define in mt8195. It can also support resistance value(ohm) "75000" & "5000" in mt8195.
> - oneOf:
> - - enum: [100, 101, 102, 103]
> - - description: mt8195 pull down PUPD/R0/R1 type define value.
> - - enum: [200, 201, 202, 203, 204, 205, 206, 207]
> - - description: mt8195 pull down RSEL type define value.
> - - enum: [75000, 5000]
> - - description: mt8195 pull down RSEL type si unit value(ohm).
> -
> - An example of using RSEL define:
> - pincontroller {
> - i2c0_pin {
> - pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> - bias-pull-down = <MTK_PULL_SET_RSEL_001>;
> - };
> - };
> - An example of using si unit resistance value(ohm):
> - &pio {
> - mediatek,rsel_resistance_in_si_unit;
> - }
> - pincontroller {
> - i2c0_pin {
> - pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> - bias-pull-down = <75000>;
> - };
> - };
> -
> - bias-pull-up:
> + additionalProperties: false
> + patternProperties:
> + 'pins':
Can we constrain this a bit more.
> + type: object
> + additionalProperties: false
> description: |
> - For pull up type is normal, it don't need add RSEL & R1R0 define
> - and resistance value.
> - For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
> - set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
> - "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11"
> - define in mt8195.
> - For pull up type is RSEL, it can add RSEL define & resistance value(ohm)
> - to set different resistance by identifying property "mediatek,rsel_resistance_in_si_unit".
> - It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
> - & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" & "MTK_PULL_SET_RSEL_100"
> - & "MTK_PULL_SET_RSEL_101" & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
> - define in mt8195. It can also support resistance value(ohm)
> - "1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & "75000" in mt8195.
> - oneOf:
> - - enum: [100, 101, 102, 103]
> - - description: mt8195 pull up PUPD/R0/R1 type define value.
> - - enum: [200, 201, 202, 203, 204, 205, 206, 207]
> - - description: mt8195 pull up RSEL type define value.
> - - enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
> - - description: mt8195 pull up RSEL type si unit value(ohm).
> - An example of using RSEL define:
> + 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 {
> - i2c0_pin {
> - pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> - bias-pull-up = <MTK_PULL_SET_RSEL_001>;
> + /* GPIO0 set as multifunction GPIO0 */
> + gpio_pin {
> + pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> };
> - };
> - An example of using si unit resistance value(ohm):
> - &pio {
> - mediatek,rsel_resistance_in_si_unit;
> - }
> - pincontroller {
> + /* GPIO8 set as multifunction SDA0 */
> i2c0_pin {
> pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> - bias-pull-up = <1000>;
> };
> };
> -
> - 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
> + $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:
> + enum: [2, 4, 6, 8, 10, 12, 14, 16]
> +
> + bias-pull-down:
> + description: |
> + For pull down type is normal, it don't need add RSEL & R1R0 define
> + and resistance value.
> + For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
> + set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
> + "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
> + "MTK_PUPD_SET_R1R0_11" define in mt8195.
> + For pull down type is RSEL, it can add RSEL define & resistance
> + value(ohm) to set different resistance by identifying property
> + "mediatek,rsel_resistance_in_si_unit".
> + It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
> + & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
> + & "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
> + & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
> + define in mt8195. It can also support resistance value(ohm)
> + "75000" & "5000" in mt8195.
> + oneOf:
> + - enum: [100, 101, 102, 103]
> + - description: mt8195 pull down PUPD/R0/R1 type define value.
> + - enum: [200, 201, 202, 203, 204, 205, 206, 207]
> + - description: mt8195 pull down RSEL type define value.
> + - enum: [75000, 5000]
> + - description: mt8195 pull down RSEL type si unit value(ohm).
> +
> + An example of using RSEL define:
> + pincontroller {
> + i2c0_pin {
> + pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> + bias-pull-down = <MTK_PULL_SET_RSEL_001>;
Isn't this now out of date?
> + };
> + };
> + An example of using si unit resistance value(ohm):
> + &pio {
> + mediatek,rsel_resistance_in_si_unit;
> + }
> + pincontroller {
> + i2c0_pin {
> + pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> + bias-pull-down = <75000>;
> + };
> + };
> +
> + bias-pull-up:
> + description: |
> + For pull up type is normal, it don't need add RSEL & R1R0 define
> + and resistance value.
> + For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
> + set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
> + "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
> + "MTK_PUPD_SET_R1R0_11" define in mt8195.
> + For pull up type is RSEL, it can add RSEL define & resistance
> + value(ohm) to set different resistance by identifying property
> + "mediatek,rsel_resistance_in_si_unit".
> + It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
> + & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
> + & "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
> + & "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
> + define in mt8195. It can also support resistance value(ohm)
> + "1000" & "1500" & "2000" & "3000" & "4000" & "5000" & "10000" &
> + "75000" in mt8195.
> + oneOf:
> + - enum: [100, 101, 102, 103]
> + - description: mt8195 pull up PUPD/R0/R1 type define value.
> + - enum: [200, 201, 202, 203, 204, 205, 206, 207]
> + - description: mt8195 pull up RSEL type define value.
> + - enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
> + - description: mt8195 pull up RSEL type si unit value(ohm).
> + An example of using RSEL define:
> + pincontroller {
> + i2c0_pin {
> + pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> + bias-pull-up = <MTK_PULL_SET_RSEL_001>;
> + };
> + };
> + An example of using si unit resistance value(ohm):
> + &pio {
> + mediatek,rsel_resistance_in_si_unit;
> + }
> + pincontroller {
> + i2c0_pin {
> + pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
> + bias-pull-up = <1000>;
> + };
> + };
> +
> + 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
>
> required:
> - compatible
> @@ -201,30 +211,33 @@ additionalProperties: false
>
> examples:
> - |
> - #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
> - #include <dt-bindings/interrupt-controller/arm-gic.h>
> - pio: pinctrl@10005000 {
> - compatible = "mediatek,mt8195-pinctrl";
> - reg = <0x10005000 0x1000>,
> - <0x11d10000 0x1000>,
> - <0x11d30000 0x1000>,
> - <0x11d40000 0x1000>,
> - <0x11e20000 0x1000>,
> - <0x11eb0000 0x1000>,
> - <0x11f40000 0x1000>,
> - <0x1000b000 0x1000>;
> - reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
> - "iocfg_br", "iocfg_lm", "iocfg_rb",
> - "iocfg_tl", "eint";
> - gpio-controller;
> - #gpio-cells = <2>;
> - gpio-ranges = <&pio 0 0 144>;
> - interrupt-controller;
> - interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>;
> - #interrupt-cells = <2>;
> -
> - pio-pins {
> - pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> - output-low;
> - };
> - };
> + #include <dt-bindings/pinctrl/mt8195-pinfunc.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #
> + pio: pinctrl@10005000 {
> + compatible = "mediatek,mt8195-pinctrl";
> + reg = <0x10005000 0x1000>,
> + <0x11d10000 0x1000>,
> + <0x11d30000 0x1000>,
> + <0x11d40000 0x1000>,
> + <0x11e20000 0x1000>,
> + <0x11eb0000 0x1000>,
> + <0x11f40000 0x1000>,
> + <0x1000b000 0x1000>;
> + reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
> + "iocfg_br", "iocfg_lm", "iocfg_rb",
> + "iocfg_tl", "eint";
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-ranges = <&pio 0 0 144>;
> + interrupt-controller;
> + interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>;
> + #interrupt-cells = <2>;
> +
> + pio-pins {
> + pins_bus {
Don't use '_' in node names.
> + pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> + output-low;
> + };
> + };
> + };
> --
> 2.18.0
>
>
