linux-kernel - Re: [PATCH] pinctrl: qcom: sdm845: Enable dual edge errata

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Message-ID: <CAD=FV=VWN36A=O1V+2jfWM5jLShvZfVOCGnt_MSSGct=kFtoOw@mail.gmail.com>
Date:   Tue, 2 Nov 2021 06:38:36 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Steev Klimaszewski <steev@...i.org>
Subject: Re: [PATCH] pinctrl: qcom: sdm845: Enable dual edge errata

Hi,

On Mon, Nov 1, 2021 at 8:41 PM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> It has been observed that dual edge triggered wakeirq GPIOs on SDM845
> doesn't trigger interrupts on the falling edge.
>
> Enabling wakeirq_dual_edge_errata for SDM845 indicates that the PDC in
> SDM845 suffers from the same problem described, and worked around, by
> Doug in 'c3c0c2e18d94 ("pinctrl: qcom: Handle broken/missing PDC dual
> edge IRQs on sc7180")', so enable the workaround for SDM845 as well.
>
> The specific problem seen without this is that gpio-keys does not detect
> the falling edge of the LID gpio on the Lenovo Yoga C630 and as such
> consistently reports the LID as closed.
>
> Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  drivers/pinctrl/qcom/pinctrl-sdm845.c | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Douglas Anderson <dianders@...omium.org>