linux-kernel - Re: [PATCH v4 4/9] dt-bindings: pinctrl: Add Nuvoton WPCM450

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Date:   Fri, 21 Jan 2022 17:08:15 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jonathan Neuschäfer <j.neuschaefer@....net>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        devicetree@...r.kernel.org, Nancy Yuen <yuenn@...gle.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Joel Stanley <joel@....id.au>, linux-kernel@...r.kernel.org,
        Benjamin Fair <benjaminfair@...gle.com>,
        Patrick Venture <venture@...gle.com>,
        linux-gpio@...r.kernel.org, Avi Fishman <avifishman70@...il.com>,
        openbmc@...ts.ozlabs.org
Subject: Re: [PATCH v4 4/9] dt-bindings: pinctrl: Add Nuvoton WPCM450

On Sun, 09 Jan 2022 18:29:55 +0100, Jonathan Neuschäfer wrote:
> This binding is heavily based on the one for NPCM7xx, because the
> hardware is similar. There are some notable differences, however:
> 
> - The addresses of GPIO banks are not physical addresses but simple
>   indices (0 to 7), because the GPIO registers are not laid out in
>   convenient blocks.
> - Pinmux settings can explicitly specify that the GPIO mode is used.
> 
> Certain pins support blink patterns in hardware. This is currently not
> modelled in the DT binding.
> 
> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
> 
> ---
> v4:
> - Small improvements around gpio node addresses, suggested by Rob Herring
> 
> v3:
> - https://lore.kernel.org/lkml/20211224200935.93817-5-j.neuschaefer@gmx.net/
> - Make changes suggested by Rob Herring
> - Fix lint errors
> - Simplify child node patterns
> - Remove if/type=object/then trick
> - Reduce interrupts.maxItems to 3: 4 aren't necessary
> - Replace list of gpio0/1/2/etc. with pattern
> - Remove nuvoton,interrupt-map again, to simplify the binding
> - Make tuples clearer
> 
> v2:
> - https://lore.kernel.org/lkml/20211207210823.1975632-5-j.neuschaefer@gmx.net/
> - Move GPIO into subnodes
> - Improve use of quotes
> - Remove unnecessary minItems/maxItems lines
> - Remove "phandle: true"
> - Use separate prefixes for pinmux and pincfg nodes
> - Add nuvoton,interrupt-map property
> - Make it possible to set pinmux to GPIO explicitly
> 
> v1:
> - https://lore.kernel.org/lkml/20210602120329.2444672-5-j.neuschaefer@gmx.net/
> ---
>  .../pinctrl/nuvoton,wpcm450-pinctrl.yaml      | 160 ++++++++++++++++++
>  1 file changed, 160 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/nuvoton,wpcm450-pinctrl.yaml
> 

Reviewed-by: Rob Herring <robh@...nel.org>