Re: [PATCH v2 1/7] dt-bindings: pinctrl: Add pinctrl for Sophgo CV1800 series SoC.

[Rob Herring <robh@kernel.org>]

On Mon, Jul 22, 2024 at 09:39:20AM +0800, Inochi Amaoto wrote:
> Add pinctrl support for Sophgo CV1800 series SoC.
> 
> Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
> ---
>  .../pinctrl/sophgo,cv1800-pinctrl.yaml        | 129 ++++++++++++++++++
>  include/dt-bindings/pinctrl/pinctrl-cv1800b.h |  63 +++++++++
>  include/dt-bindings/pinctrl/pinctrl-cv1812h.h | 127 +++++++++++++++++
>  include/dt-bindings/pinctrl/pinctrl-cv18xx.h  |  19 +++
>  include/dt-bindings/pinctrl/pinctrl-sg2000.h  | 127 +++++++++++++++++
>  include/dt-bindings/pinctrl/pinctrl-sg2002.h  |  79 +++++++++++
>  6 files changed, 544 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/sophgo,cv1800-pinctrl.yaml
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-cv1800b.h
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-cv1812h.h
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-cv18xx.h
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-sg2000.h
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-sg2002.h
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/sophgo,cv1800-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/sophgo,cv1800-pinctrl.yaml
> new file mode 100644
> index 000000000000..e6bd271ad22d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/sophgo,cv1800-pinctrl.yaml
> @@ -0,0 +1,129 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/sophgo,cv1800-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800 Pin Controller
> +
> +maintainers:
> +  - Inochi Amaoto <inochiama@outlook.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sophgo,cv1800b-pinctrl
> +      - sophgo,cv1812h-pinctrl
> +      - sophgo,sg2000-pinctrl
> +      - sophgo,sg2002-pinctrl
> +
> +  reg:
> +    items:
> +      - description: pinctrl for system domain
> +      - description: pinctrl for rtc domain
> +
> +  reg-names:
> +    items:
> +      - const: sys
> +      - const: rtc
> +
> +  resets:
> +    maxItems: 1
> +
> +patternProperties:
> +  '-cfg$':
> +    type: object
> +    description: |

Don't need '|' if no formatting.

> +      A pinctrl node should contain at least one subnode representing the
> +      pinctrl groups available on the machine.
> +
> +    additionalProperties: false
> +
> +    patternProperties:
> +      '-pins$':
> +        type: object
> +        description: |
> +          Each subnode will list the pins it needs, and how they should
> +          be configured, with regard to muxer configuration, bias, input
> +          enable/disable, input schmitt trigger, slew-rate, drive strength
> +          and bus hold state. In addition, all pins in the same subnode
> +          should have the same power domain. For configuration detail,
> +          refer to https://github.com/sophgo/sophgo-doc/.
> +        $ref: /schemas/pinctrl/pincfg-node.yaml
> +
> +        properties:
> +          pinmux:
> +            description: |
> +              The list of GPIOs and their mux settings that properties in the
> +              node apply to. This should be set using the GPIOMUX or GPIOMUX2
> +              macro.
> +            $ref: /schemas/pinctrl/pinmux-node.yaml#/properties/pinmux

You already referenced this above which is the right way. Drop this 
$ref.

> +
> +          bias-pull-up:
> +            type: boolean
> +
> +          bias-pull-down:
> +            type: boolean
> +
> +          drive-strength:
> +            description: typical current when output high level, but in mA.
> +            $ref: /schemas/types.yaml#/definitions/uint32
> +
> +          drive-strength-microamp:
> +            description: typical current when output high level.

New binding, why do you need both of these properties? Use the latter.

> +
> +          input-schmitt-microvolt:
> +            description: typical threshold for schmitt trigger.

No constraints?

> +
> +          power-source:
> +            description: power supplies at X mV.
> +            enum: [ 1800, 3300 ]
> +
> +          slew-rate:
> +            description: slew rate for output buffer (0 is fast, 1 is slow)
> +            enum: [ 0, 1 ]
> +
> +          bias-bus-hold:
> +            type: boolean
> +
> +        required:
> +          - pinmux
> +          - power-source
> +
> +        additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/pinctrl/pinctrl-cv1800b.h>
> +
> +    soc {
> +        #address-cells = <1>;
> +        #size-cells = <1>;

You can remove 'soc' node from the example. 1 cell is the default for 
examples.

> +
> +        pinctrl@3001000 {
> +            compatible = "sophgo,cv1800b-pinctrl";
> +            reg = <0x03001000 0x1000>,
> +                  <0x05027000 0x1000>;
> +            reg-names = "sys", "rtc";
> +
> +            uart0_cfg: uart0-cfg {
> +                uart0-pins {
> +                    pinmux = <PINMUX(PIN_UART0_TX, 0)>,
> +                             <PINMUX(PIN_UART0_RX, 0)>;
> +                    bias-pull-up;
> +                    drive-strength = <2>;
> +                    power-source = <3300>;
> +                    slew-rate = <0>;
> +                };
> +            };
> +        };
> +    };
> +
> +...