linux-kernel - Re: [PATCH v2 07/10] pinctrl: mediatek: Switch to use DEFINE_NOIRQ_DEV_PM

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Date:   Mon, 17 Jul 2023 21:06:54 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Balsam CHIHI <bchihi@...libre.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org
Cc:     Andy Shevchenko <andy@...nel.org>,
        Sean Wang <sean.wang@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>
Subject: Re: [PATCH v2 07/10] pinctrl: mediatek: Switch to use
 DEFINE_NOIRQ_DEV_PM_OPS() helper

Hi Andy,


Le lundi 17 juillet 2023 à 20:28 +0300, Andy Shevchenko a écrit :
> Since pm.h provides a helper for system no-IRQ PM callbacks,
> switch the driver to use it instead of open coded variant.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 5 +----
>  drivers/pinctrl/mediatek/pinctrl-paris.c      | 9 +++------
>  2 files changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index 665dec419e7c..2bf5082d3aa9 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> @@ -922,10 +922,7 @@ static int mtk_eint_resume(struct device
> *device)
>         return mtk_eint_do_resume(pctl->eint);
>  }
>  
> -const struct dev_pm_ops mtk_eint_pm_ops = {
> -       .suspend_noirq = mtk_eint_suspend,
> -       .resume_noirq = mtk_eint_resume,
> -};
> +DEFINE_NOIRQ_DEV_PM_OPS(mtk_eint_pm_ops, mtk_eint_suspend,
> mtk_eint_resume);
>  
>  static int mtk_pctrl_build_state(struct platform_device *pdev)
>  {
> diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c
> b/drivers/pinctrl/mediatek/pinctrl-paris.c
> index 33d6c3fb7908..b1cbd5bafa2e 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-paris.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
> @@ -1119,24 +1119,21 @@ int mtk_paris_pinctrl_probe(struct
> platform_device *pdev)
>  }
>  EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe);
>  
> -static int mtk_paris_pinctrl_suspend(struct device *device)
> +static int mtk_paris_suspend(struct device *device)
>  {
>         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
>  
>         return mtk_eint_do_suspend(pctl->eint);
>  }
>  
> -static int mtk_paris_pinctrl_resume(struct device *device)
> +static int mtk_paris_resume(struct device *device)
>  {
>         struct mtk_pinctrl *pctl = dev_get_drvdata(device);
>  
>         return mtk_eint_do_resume(pctl->eint);
>  }
>  
> -const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = {
> -       .suspend_noirq = mtk_paris_pinctrl_suspend,
> -       .resume_noirq = mtk_paris_pinctrl_resume,
> -};
> +DEFINE_NOIRQ_DEV_PM_OPS(mtk_paris_pinctrl_pm_ops, mtk_paris_suspend,
> mtk_paris_resume);

It's a bit more work, but I think you should use EXPORT_GPL_DEV_PM_OPS
(or even better, EXPORT_NS_GPL_DEV_PM_OPS) so that the dev_pm_ops is
conditionally exported. All callers would have to be updated to use
pm_ptr().

Cheers,
-Paul

>  
>  MODULE_LICENSE("GPL v2");
>  MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");