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

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Date:   Tue, 2 Nov 2021 11:35:52 -0500
From:   Steev Klimaszewski <steev@...i.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: qcom: sdm845: Enable dual edge errata


On 11/1/21 10:41 PM, Bjorn Andersson 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(+)
>
> diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c
> index c51793f6546f..fdfd7b8f3a76 100644
> --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c
> +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c
> @@ -1310,6 +1310,7 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = {
>   	.ngpios = 151,
>   	.wakeirq_map = sdm845_pdc_map,
>   	.nwakeirq_map = ARRAY_SIZE(sdm845_pdc_map),
> +	.wakeirq_dual_edge_errata = true,
>   };
>   
>   static const struct msm_pinctrl_soc_data sdm845_acpi_pinctrl = {

Tested here with a number of suspend cycles, works as expected now.  
Thank you so much!

Tested-By: Steev Klimaszewski <steev@...i.org>