linux-kernel - Re: [PATCH v4 2/4] pinctrl: renesas: Add RZ/G2L pin and gpio controller driver

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Date:   Tue, 10 Aug 2021 11:13:15 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Magnus Damm <magnus.damm@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v4 2/4] pinctrl: renesas: Add RZ/G2L pin and gpio
 controller driver

Hi Prabhakar,

On Tue, Jul 27, 2021 at 1:23 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> Add support for pin and gpio controller driver for RZ/G2L SoC.
>
> Based on a patch in the BSP by Hien Huynh <hien.huynh.px@...esas.com>.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Biju Das <biju.das.jz@...renesas.com>

Thanks for your patch!

> --- /dev/null
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c

> +static void rzg2l_pinctrl_clk_disable(void *data)
> +{
> +       struct clk *clk = data;

No need for the intermediate variable.

> +
> +       clk_disable_unprepare(clk);
> +}
> +
> +static int rzg2l_pinctrl_probe(struct platform_device *pdev)
> +{
> +       struct rzg2l_pinctrl *pctrl;
> +       int ret;
> +
> +       pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
> +       if (!pctrl)
> +               return -ENOMEM;
> +
> +       pctrl->dev = &pdev->dev;
> +
> +       pctrl->data = of_device_get_match_data(&pdev->dev);
> +       if (!pctrl->data)
> +               return -EINVAL;
> +
> +       pctrl->base = devm_platform_ioremap_resource(pdev, 0);
> +       if (IS_ERR(pctrl->base))
> +               return PTR_ERR(pctrl->base);
> +
> +       pctrl->clk = devm_clk_get(pctrl->dev, NULL);
> +       if (IS_ERR(pctrl->clk)) {
> +               ret = PTR_ERR(pctrl->clk);
> +               dev_err(pctrl->dev, "failed to get GPIO clk : %i\n", ret);
> +               return ret;
> +       };
> +
> +       spin_lock_init(&pctrl->lock);
> +
> +       platform_set_drvdata(pdev, pctrl);
> +
> +       ret = clk_prepare_enable(pctrl->clk);
> +       if (ret) {
> +               dev_err(pctrl->dev, "failed to enable GPIO clk: %i\n", ret);
> +               return ret;
> +       };
> +
> +       ret = devm_add_action_or_reset(&pdev->dev, rzg2l_pinctrl_clk_disable, pctrl->clk);

This line is a bit long.

> +       if (ret) {
> +               dev_err(pctrl->dev, "failed to register pinctrl clk disable devm action, %i\n",

Elsewhere, this is called the "GPIO clk".
This line is a bit long.

> +                       ret);
> +               return ret;
> +       }
> +
> +       ret = rzg2l_pinctrl_register(pctrl);
> +       if (ret)
> +               return ret;
> +
> +       dev_info(pctrl->dev, "%s support registered\n", DRV_NAME);
> +       return 0;
> +}

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
i.e. will queue in renesas-pinctrl-for-v5.15, with the above fixed, so no need
to resend.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds