linux-kernel - Re: [PATCH] pinctrl: msm: Add sleep pinctrl state transitions

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Date:   Fri, 09 Nov 2018 16:02:48 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Evan Green <evgreen@...omium.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Evan Green <evgreen@...omium.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] pinctrl: msm: Add sleep pinctrl state transitions

Quoting Evan Green (2018-11-09 14:28:35)
> Add PM suspend callbacks to the msm core driver that select the
> sleep and default pinctrl states. Then wire those callbacks up
> in the sdm845 driver, for those boards that may have GPIO hogs
> that need to change state during suspend.
> 
> Signed-off-by: Evan Green <evgreen@...omium.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>

> 
>  drivers/pinctrl/qcom/pinctrl-msm.c    | 16 ++++++++++++++++
>  drivers/pinctrl/qcom/pinctrl-msm.h    |  2 ++
>  drivers/pinctrl/qcom/pinctrl-sdm845.c |  4 ++++
>  3 files changed, 22 insertions(+)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
> index 7c7d083e2c0dc..d505d0a50f0a5 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c
> @@ -1072,6 +1072,22 @@ static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl)
>                 }
>  }
>  
> +int msm_pinctrl_suspend(struct device *dev)
> +{
> +       struct msm_pinctrl *pctrl = dev_get_drvdata(dev);
> +
> +       return pinctrl_force_sleep(pctrl->pctrl);
> +}
> +EXPORT_SYMBOL(msm_pinctrl_suspend);
> +
> +int msm_pinctrl_resume(struct device *dev)
> +{
> +       struct msm_pinctrl *pctrl = dev_get_drvdata(dev);
> +
> +       return pinctrl_force_default(pctrl->pctrl);
> +}
> +EXPORT_SYMBOL(msm_pinctrl_resume);

It's too bad this can't be installed by default into the driver somehow
so we don't have to repeat this for each device driver. O well!