linux-kernel - Re: [PATCH v3] pinctrl:mediatek:add EINT support to virtual GPIOs

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Date:   Thu, 27 Dec 2018 11:16:09 -0800
From:   Sean Wang <sean.wang@...nel.org>
To:     chuanjia.liu@...iatek.com
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        youlin.pei@...iatek.com, eddie.huang@...iatek.com,
        zhiyong.tao@...iatek.com, hailong.fan@...iatek.com
Subject: Re: [PATCH v3] pinctrl:mediatek:add EINT support to virtual GPIOs

On Mon, Dec 24, 2018 at 8:25 PM <chuanjia.liu@...iatek.com> wrote:
>
> From: Chuanjia Liu <Chuanjia.Liu@...iatek.com>
>

there are still some nitpicks

an empty char should follow the ':' char

> Virtual gpio only used inside SOC and not being exported to outside SOC.
> Some modules use virtual gpio as eint and doesn't nedd SMT.

s/nedd/need/

> So this patch add EINT support to virtual GPIOs.
>
> Signed-off-by: Chuanjia Liu <Chuanjia.Liu@...iatek.com>
> ---
> change note:
> v3 : 1. modify subject and description
>       2. modify comments
> ---
>  drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> index 4a9e0d4c2bbc..a0db145f798d 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> @@ -290,7 +290,15 @@ static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n)
>                 return err;
>
>         err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_ENABLE);
> -       if (err)
> +       /*

merge the second line to be consistent with the other comment blocks

> +        *SMT is supposed to be supported by every real GPIO and doesn't

an empty char should follow '*' char to be consistent with the other
comment blocks
and also in the other lines starting with '*'

> +        *support virtual GPIOs, so the extra condition err != -ENOTSUPP
> +        *is just for adding EINT support to these virtual GPIOs. It should
> +        *add an extra flag in the pin descriptor when more pins with
> +        *distinctive characteristic come out.
> +        */
> +

remove the blank line

> +       if (err && err != -ENOTSUPP)
>                 return err;
>
>         return 0;
> --
> 2.19.1
>