Re: [PATCH 4/4] dt-bindings: gpio: Add Loongson-1 GPIO

[Kelvin Cheung]

On Wed, Feb 22, 2023 at 8:35 PM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
>
> On 22/02/2023 12:12, Keguang Zhang wrote:
> > Add devicetree binding document for Loongson-1 GPIO.
> >
> > Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx>
> > ---
> >  .../bindings/gpio/loongson,ls1x-gpio.yaml     | 60 +++++++++++++++++++
> >  1 file changed, 60 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml b/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> > new file mode 100644
> > index 000000000000..e4ab49d48fae
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/gpio/loongson,ls1x-gpio.yaml
> > @@ -0,0 +1,60 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/gpio/loongson,ls1x-gpio.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Loongson-1 GPIO controller
> > +
> > +maintainers:
> > +  - Keguang Zhang <keguang.zhang@xxxxxxxxx>
> > +
> > +properties:
> > +  compatible:
> > +    const: loongson,ls1x-gpio
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  gpio-controller: true
> > +
> > +  "#gpio-cells":
> > +    const: 2
> > +
> > +  ngpios:
> > +    minimum: 1
> > +    maximum: 32
>
> Isn't this fixed at 32? Do you have hardware with different number of GPIOs?
>
Yes. The GPIO number of some groups is less than 32.
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - gpio-controller
> > +  - '#gpio-cells'
>
> Use consistent quotes - either " or '
>
Will do.

> > +  - ngpios
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    gpio0: gpio@1fd010c0 {
> > +        compatible = "loongson,ls1x-gpio";
> > +        reg = <0x1fd010c0 0x4>;
> > +
> > +        gpio-controller;
> > +        #gpio-cells = <2>;
> > +
> > +        ngpios = <32>;
> > +    };
> > +
> > +  - |
> > +    gpio1: gpio@1fd010c4 {
> > +        compatible = "loongson,ls1x-gpio";
> > +        reg = <0x1fd010c4 0x4>;
> > +
> > +        gpio-controller;
> > +        #gpio-cells = <2>;
> > +
> > +        ngpios = <32>;
> > +    };
>
> These are two the same examples, keep only one.
>
Will do.

> Best regards,
> Krzysztof
>


-- 
Best regards,

Kelvin Cheung