linux-kernel - Re: [PATCH v2] pinctrl: mediatek: Fix fallback behavior for bias_set

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Date:   Thu, 1 Jul 2021 19:26:40 +0800
From:   zhiyong tao <zhiyong.tao@...iatek.com>
To:     Chen-Yu Tsai <wenst@...omium.org>
CC:     <hui.liu@...iatek.com>, Hsin-Yi Wang <hsinyi@...omium.org>,
        Sean Wang <sean.wang@...nel.org>,
        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>
Subject: Re: [PATCH v2] pinctrl: mediatek: Fix fallback behavior for
 bias_set_combo

On Thu, 2021-07-01 at 16:41 +0800, Chen-Yu Tsai wrote:
> On Thu, Jul 1, 2021 at 4:10 PM Hsin-Yi Wang <hsinyi@...omium.org> wrote:
> >
> > Some pin doesn't support PUPD register, if it fails and fallbacks with
> > bias_set_combo case, it will call mtk_pinconf_bias_set_pupd_r1_r0() to
> > modify the PUPD pin again.
> >
> > Since the general bias set are either PU/PD or PULLSEL/PULLEN, try
> > bias_set or bias_set_rev1 for the other fallback case. If the pin
> > doesn't support neither PU/PD nor PULLSEL/PULLEN, it will return
> > -ENOTSUPP.
> >
> > Fixes: 81bd1579b43e ("pinctrl: mediatek: Fix fallback call path")
> > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> 
> Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Zhiyong Tao <zhiyong.tao@...iatek.com>