Re: [PATCH 2/6] dt-bindings: pinctrl: mt8195: add binding document

[zhiyong tao <zhiyong.tao@xxxxxxxxxxxx>]

On Mon, 2021-03-29 at 08:58 -0500, Rob Herring wrote:
> On Mon, Mar 29, 2021 at 02:50:43PM +0800, Zhiyong Tao wrote:
> > The commit adds mt8195 compatible node in binding document.
> > 
> > Signed-off-by: Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx>
> > ---
> >  .../bindings/pinctrl/pinctrl-mt8195.yaml      | 152 ++++++++++++++++++
> >  1 file changed, 152 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> > new file mode 100644
> > index 000000000000..7915b9568c29
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
> > @@ -0,0 +1,152 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8195.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Mediatek MT8195 Pin Controller
> > +
> > +maintainers:
> > +  - Sean Wang <sean.wang@xxxxxxxxxxxx>
> > +
> > +description: |
> > +  The Mediatek's Pin controller is used to control SoC pins.
> > +
> > +properties:
> > +  compatible:
> > +    const: mediatek,mt8195-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 8 GPIO
> > +      physical address base in mt8195.
> > +    maxItems: 8
> > +
> > +  reg-names:
> > +    description: |
> > +      Gpio base register names.
> > +    maxItems: 8
> > +
> > +  interrupt-controller: true
> > +
> > +  '#interrupt-cells':
> > +    const: 2
> > +
> > +  interrupts:
> > +    description: The interrupt outputs to sysirq.
> > +    maxItems: 1
> > +
> > +#PIN CONFIGURATION NODES
> > +patternProperties:
> > +  '^pins':
> 
> Normally we're doing '-pins$'.

==> Thanks for your suggestion. we will change it in next version.
> 
> > +    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 {
> 
> Use the node name pattern defined.

==> Thanks for your suggestion. we will change it in next version.
> 
> > +          pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> > +        };
> > +        /* GPIO1 set as multifunction CLKM1 */
> > +        state_0_node_b {
> > +          pinmux = <PINMUX_GPIO1__FUNC_CLKM1>;
> > +        };
> > +      };
> > +    $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 mt8195.
> > +        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/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>,
> > +                          <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>;
> > +
> > +                    pins {
> > +                      pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
> > +                      output-low;
> > +                    };
> > +            };
> > -- 
> > 2.18.0
> >