linux-kernel - Re: [PATCH v1 2/2] pinctrl: nuvoton: add NPCM8XX pinctrl and GPIO driver

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Date:   Wed, 13 Jul 2022 17:51:01 +0300
From:   Tomer Maimon <tmaimon77@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Avi Fishman <avifishman70@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Joel Stanley <joel@....id.au>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        zhengbin13@...wei.com, OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH v1 2/2] pinctrl: nuvoton: add NPCM8XX pinctrl and GPIO driver

On Wed, 13 Jul 2022 at 17:29, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 13/07/2022 15:35, Tomer Maimon wrote:
>
> >>> +static int npcm8xx_pinctrl_probe(struct platform_device *pdev)
> >>> +{
> >>> +     struct npcm8xx_pinctrl *pctrl;
> >>> +     int ret;
> >>> +
> >>> +     pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
> >>> +     if (!pctrl)
> >>> +             return -ENOMEM;
> >>> +
> >>> +     pctrl->dev = &pdev->dev;
> >>> +     dev_set_drvdata(&pdev->dev, pctrl);
> >>> +
> >>> +     pctrl->gcr_regmap =
> >>> +             syscon_regmap_lookup_by_compatible("nuvoton,npcm845-gcr");
> >>
> >> No. Use property. By this patchset, I would expect that you learnt from
> >> previous mistakes around this. Why repeating the same trouble second time?
> > You suggest to use phandle property like nuvoton,sysgcr even that the
> > NPCM8XX pin controller driver is used only NPCM8XX SoC, so the only
> > GCR node in the NPCM8XX SoC is nuvoton,npcm845-gcr?
>
> Yes. The previous case (reset driver, AFAIR) was also about driver used
> only in one SoC, wasn't it?
Actually not, the NPCM reset driver serves NPCM7XX and NPCM8XX and
probably other future BMC SoC's
Still, you suggest using the phandle property in the driver even if
the driver serves one SoC?
>
> Best regards,
> Krzysztof

Best regards,

Tomer