linux-kernel - Re: [PATCH v2] pinctrl: mediatek: check mtk_is_virt

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Date:   Sun, 27 Sep 2020 11:07:45 -0700
From:   Sean Wang <sean.wang@...nel.org>
To:     Hanks Chen <hanks.chen@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        CC Hwang <cc.hwang@...iatek.com>,
        sin_jieyang <sin_jieyang@...iatek.com>
Subject: Re: [PATCH v2] pinctrl: mediatek: check mtk_is_virt_gpio input parameter

On Fri, Sep 25, 2020 at 5:51 AM Hanks Chen <hanks.chen@...iatek.com> wrote:
>
> Hi Sean & Linux & Matthias,
>
> Please kindly let me know your comments about this fixes patch.
> Thanks
>

Acked-by: Sean Wang <sean.wang@...nel.org>

> Regards,
> Hanks
>
>
> On Thu, 2020-08-20 at 19:22 +0800, Hanks Chen wrote:
> > check mtk_is_virt_gpio input parameter,
> > virtual gpio need to support eint mode.
> >
> > add error handler for the ko case
> > to fix this boot fail:
> > pc : mtk_is_virt_gpio+0x20/0x38 [pinctrl_mtk_common_v2]
> > lr : mtk_gpio_get_direction+0x44/0xb0 [pinctrl_paris]
> >
> > Fixes: edd546465002 ("pinctrl: mediatek: avoid virtual gpio trying to set reg")
> > Singed-off-by: Jie Yang <sin_jieyang@...iatek.com>
> > Signed-off-by: Hanks Chen <hanks.chen@...iatek.com>
> >
> > ---
> > Changes since v1:
> > - update Singed-off-by
> > - align with pinctrl/mediatek/pinctrl-mtk-mt*.h
> >
> > ---
> >  drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> > index c53e2c391e32..a485d79f51a1 100644
> > --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> > +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> > @@ -259,6 +259,10 @@ bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n)
> >
> >       desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
> >
> > +     /* if the GPIO is not supported for eint mode */
> > +     if (desc->eint.eint_m == NO_EINT_SUPPORT)
> > +             return virt_gpio;
> > +
> >       if (desc->funcs && !desc->funcs[desc->eint.eint_m].name)
> >               virt_gpio = true;
> >
>