linux-kernel - Re: [PATCH v6 1/2] dt-binding: pinctrl: Add NPCM8XX pinctrl and GPIO documentation

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Message-ID: <CAP6Zq1jj0WDbtL1zhr=tVyh2GPRy6-=oHjVURmJzNRm3n0HBNg@mail.gmail.com>
Date:   Mon, 28 Aug 2023 13:26:48 +0300
From:   Tomer Maimon <tmaimon77@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     linus.walleij@...aro.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        avifishman70@...il.com, tali.perry1@...il.com, joel@....id.au,
        venture@...gle.com, yuenn@...gle.com, benjaminfair@...gle.com,
        j.neuschaefer@....net, openbmc@...ts.ozlabs.org,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v6 1/2] dt-binding: pinctrl: Add NPCM8XX pinctrl and GPIO documentation

Hi Krzysztof,

Thanks for your comments

On Mon, 28 Aug 2023 at 10:10, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 27/08/2023 22:36, Tomer Maimon wrote:
> > Added device tree binding documentation for Nuvoton Arbel BMC NPCM8XX
> > pinmux and GPIO controller.
> >
> > Signed-off-by: Tomer Maimon <tmaimon77@...il.com>
> > Reviewed-by: Rob Herring <robh@...nel.org>
> > ---
>
>
> > +  '^pin':
> > +    $ref: pincfg-node.yaml#
> > +
> > +    properties:
> > +      pins:
> > +        description:
> > +          A list of pins to configure in certain ways, such as enabling
> > +          debouncing
>
> What pin names are allowed?
Do you mean to describe all the allowed pin items?
for example:
      items:
        pattern:
'GPIO0/IOX1_DI/SMB6C_SDA/SMB18_SDA|GPIO1/IOX1_LD/SMB6C_SCL/SMB18_SCL'
or
      items:
        pattern: '^GPIO([0-9]|[0-9][0-9]|[1-2][0-4][0-9]|25[0-6])$'

is good enough?
>
> > +
> > +      bias-disable: true
> > +
> > +      bias-pull-up: true
> > +
> > +      bias-pull-down: true
> > +
> > +      input-enable: true
> > +
> > +      output-low: true
> > +
> > +      output-high: true
> > +
> > +      drive-push-pull: true
> > +
> > +      drive-open-drain: true
> > +
> > +      input-debounce:
> > +        description:
> > +          Debouncing periods in microseconds, one period per interrupt
> > +          bank found in the controller
> > +        $ref: /schemas/types.yaml#/definitions/uint32-array
> > +        minItems: 1
> > +        maxItems: 4
> > +
> > +      slew-rate:
> > +        description: |
> > +          0: Low rate
> > +          1: High rate
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        enum: [0, 1]
> > +
> > +      drive-strength:
> > +        enum: [ 0, 1, 2, 4, 8, 12 ]
> > +
> > +    additionalProperties: false
> > +
> > +allOf:
> > +  - $ref: pinctrl.yaml#
> > +
> > +required:
> > +  - compatible
> > +  - ranges
> > +  - '#address-cells'
> > +  - '#size-cells'
> > +  - nuvoton,sysgcr
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/gpio/gpio.h>
> > +
> > +    soc {
> > +      #address-cells = <2>;
> > +      #size-cells = <2>;
> > +
> > +      pinctrl: pinctrl@...00260 {
>
> Nothing improved here. Test your DTS. This is being reported - I checked.
what do you suggest since the pinctrl doesn't have a reg parameter,
maybe pinctrl: pinctrl@0?
BTW, I have run both dt_binding_check and W=1 dtbs_check, and didn't
see an issue related to the pinctrl: pinctrl@...00260, do I need to
add another flag to see the issue?
>
> > +        compatible = "nuvoton,npcm845-pinctrl";
> > +        ranges = <0x0 0x0 0xf0010000 0x8000>;
> > +        #address-cells = <1>;
> > +        #size-cells = <1>;
> > +        nuvoton,sysgcr = <&gcr>;
> > +
> > +        gpio0: gpio@0 {
> > +          gpio-controller;
> > +          #gpio-cells = <2>;
> > +          reg = <0x0 0xB0>;
>
> Keep lowercase hex.
will be done in V7
>
>
> Best regards,
> Krzysztof
>

Best regards,

Tomer