linux-kernel - Re: [PATCH] arm64/hisilicon: fix SDcard detection

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Message-ID: <CAKfTPtAaVXjm8sf1o=4yfRt_pyVU0T7H8jOatm6EreYVNoWj+w@mail.gmail.com>
Date:   Wed, 9 Jan 2019 20:08:59 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Xu Wei <xuwei5@...ilicon.com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64/hisilicon: fix SDcard detection

On Wed, 9 Jan 2019 at 19:28, Linus Walleij <linus.walleij@...aro.org> wrote:
>
> Hi Vincent!
>
> On Wed, Jan 9, 2019 at 7:01 PM Vincent Guittot
> <vincent.guittot@...aro.org> wrote:
>
> > commit 89a5e15bcba8 ("gpio/mmc/of: Respect polarity in the device tree")
> > has changed how cd_gpios phandle and cd-inverted are used to set gpio's flags.
> >
> > Since this change, hikey960 SDcard is not detected anymore because flags
> > are not set correctly. Updating cd-gpios to set GPIO_ACTIVE_LOW instead
> > of high, fixes the problem.
> >
> > Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
>
> Please check if this patch fixes your problem:
> https://marc.info/?l=linux-mmc&m=154637189021211&w=2

This fix the problem

>
> > --- a/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts
> > +++ b/arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts
> > @@ -582,7 +582,7 @@
> >         sd-uhs-sdr104;
> >         disable-wp;
> >         cd-inverted;
> > -       cd-gpios = <&gpio25 3 0>;
> > +       cd-gpios = <&gpio25 3 GPIO_ACTIVE_LOW>;
>
> This is also a good change, but the old device tree should
> continue to work so we need to fix the real bug.
>
> If you also remove "cd-inverted" above, this patch should
> hopefully still work and be fine to apply as well.

ok. I'm going to send an update

>
> Yours,
> Linus Walleij