Re: [PATCH v7 2/7] dt-bindings: pinctrl: add bindings for MediaTek MT6779 SoC

From: Rob Herring
Date: Thu Jul 02 2020 - 16:58:57 EST

On Thu, Jul 02, 2020 at 08:57:05PM +0800, Hanks Chen wrote:
> From: Andy Teng <andy.teng@xxxxxxxxxxxx>
>
> Add devicetree bindings for MediaTek MT6779 pinctrl driver.
>
> Signed-off-by: Andy Teng <andy.teng@xxxxxxxxxxxx>
> ---
> .../bindings/pinctrl/mediatek,mt6779-pinctrl.yaml | 210 ++++++++++++++++++++
> 1 file changed, 210 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
> new file mode 100644
> index 0000000..3a9fc4d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
> @@ -0,0 +1,210 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6779-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek MT6779 Pin Controller Device Tree Bindings
> +
> +maintainers:
> + - Andy Teng <andy.teng@xxxxxxxxxxxx>
> +
> +description: |+
> + The pin controller node should be the child of a syscon node with the
> + required property:
> + - compatible: "syscon"
> +
> +properties:
> + compatible:
> + const: mediatek,mt6779-pinctrl
> +
> + reg:
> + minItems: 9
> + maxItems: 9
> + description: |
> + physical address base for gpio-related control registers.

Need to describe what each entry is.

items:
- description: ...
- description: ...
- description: ...

> +
> + reg-names:
> + description: |
> + GPIO base register names. The names are "gpio", "iocfg_rm",
> + "iocfg_br", "iocfg_lm", "iocfg_lb", "iocfg_rt", "iocfg_lt",
> + "iocfg_tl", "eint";

The names should be a schema.

> +
> + gpio-controller: true
> +
> + "#gpio-cells":
> + const: 2
> + 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.
> +
> + gpio-ranges:
> + minItems: 1
> + maxItems: 5
> + description: |
> + GPIO valid number range.
> +
> + interrupt-controller: true
> +
> + interrupts:
> + maxItems: 1
> + description: |
> + Specifies the summary IRQ.
> +
> + "#interrupt-cells":
> + const: 2
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - gpio-controller
> + - "#gpio-cells"
> + - gpio-ranges
> + - interrupt-controller
> + - interrupts
> + - "#interrupt-cells"
> +
> +patternProperties:
> + '-[0-9]*$':
> + type: object
> + patternProperties:
> + '-pins*$':
> + 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.

Need to include the pinconf schema here.

> +
> + 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 boot/dts/<soc>-pinfunc.h directly.
> +
> + bias-disable:
> + type: boolean

Don't redefine the type. Just indicate what common properties are used:

bias-disable: true

> +
> + bias-pull-up:
> + type: boolean
> +
> + bias-pull-down:
> + type: boolean
> +
> + input-enable:
> + type: boolean
> +
> + input-disable:
> + type: boolean
> +
> + output-low:
> + type: boolean
> +
> + output-high:
> + type: boolean
> +
> + input-schmitt-enable:
> + type: boolean
> +
> + input-schmitt-disable:
> + type: boolean
> +
> + mediatek,pull-up-adv:
> + description: |
> + Pull up setings for 2 pull resistors, R0 and R1. User can
> + configure those special pins. Valid arguments are described as below:
> + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
> + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
> + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
> + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
> + allOf:

You can drop the allOf now.

> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - enum: [0, 1, 2, 3]
> +
> + mediatek,pull-down-adv:
> + description: |
> + Pull down settings for 2 pull resistors, R0 and R1. User can
> + configure those special pins. Valid arguments are described as below:
> + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
> + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
> + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
> + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - enum: [0, 1, 2, 3]
> +
> + drive-strength:
> + description: |
> + Selects the drive strength for the specified pins in mA.
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> + - enum: [2, 4, 6, 8, 10, 12, 14, 16]
> +
> + required:
> + - pinmux
> +
> + additionalProperties: false
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/pinctrl/mt6779-pinfunc.h>
> +
> + pio: pinctrl@10005000 {
> + compatible = "mediatek,mt6779-pinctrl";
> + reg = <0 0x10005000 0 0x1000>,
> + <0 0x11c20000 0 0x1000>,
> + <0 0x11d10000 0 0x1000>,
> + <0 0x11e20000 0 0x1000>,
> + <0 0x11e70000 0 0x1000>,
> + <0 0x11ea0000 0 0x1000>,
> + <0 0x11f20000 0 0x1000>,
> + <0 0x11f30000 0 0x1000>,
> + <0 0x1000b000 0 0x1000>;
> + reg-names = "gpio", "iocfg_rm",
> + "iocfg_br", "iocfg_lm",
> + "iocfg_lb", "iocfg_rt",
> + "iocfg_lt", "iocfg_tl",
> + "eint";
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-ranges = <&pio 0 0 210>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + interrupts = <GIC_SPI 204 IRQ_TYPE_LEVEL_HIGH>;
> +
> + mmc0_pins_default: mmc0-0 {
> + cmd-dat-pins {
> + pinmux = <PINMUX_GPIO168__FUNC_MSDC0_DAT0>,
> + <PINMUX_GPIO172__FUNC_MSDC0_DAT1>,
> + <PINMUX_GPIO169__FUNC_MSDC0_DAT2>,
> + <PINMUX_GPIO177__FUNC_MSDC0_DAT3>,
> + <PINMUX_GPIO170__FUNC_MSDC0_DAT4>,
> + <PINMUX_GPIO173__FUNC_MSDC0_DAT5>,
> + <PINMUX_GPIO171__FUNC_MSDC0_DAT6>,
> + <PINMUX_GPIO174__FUNC_MSDC0_DAT7>,
> + <PINMUX_GPIO167__FUNC_MSDC0_CMD>;
> + input-enable;
> + mediatek,pull-up-adv = <1>;
> + };
> + clk-pins {
> + pinmux = <PINMUX_GPIO176__FUNC_MSDC0_CLK>;
> + mediatek,pull-down-adv = <2>;
> + };
> + rst-pins {
> + pinmux = <PINMUX_GPIO178__FUNC_MSDC0_RSTB>;
> + mediatek,pull-up-adv = <0>;
> + };
> + };
> + };
> +
> + mmc0 {
> + pinctrl-0 = <&mmc0_pins_default>;
> + pinctrl-names = "default";
> + };
> --
> 1.7.9.5