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

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Date:   Fri, 9 Nov 2018 23:20:45 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Evan Green <evgreen@...omium.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Stephen Boyd <swboyd@...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

On Fri 09 Nov 14:28 PST 2018, Evan Green wrote:

> 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>
> ---
> 
>  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);
> +
>  int msm_pinctrl_probe(struct platform_device *pdev,
>  		      const struct msm_pinctrl_soc_data *soc_data)
>  {
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h b/drivers/pinctrl/qcom/pinctrl-msm.h
> index 29172fdf5882c..e163ca600ecd3 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm.h
> +++ b/drivers/pinctrl/qcom/pinctrl-msm.h
> @@ -123,6 +123,8 @@ struct msm_pinctrl_soc_data {
>  	unsigned int ntiles;
>  };
>  
> +int msm_pinctrl_suspend(struct device *dev);
> +int msm_pinctrl_resume(struct device *dev);
>  int msm_pinctrl_probe(struct platform_device *pdev,
>  		      const struct msm_pinctrl_soc_data *soc_data);
>  int msm_pinctrl_remove(struct platform_device *pdev);
> diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c
> index 2ab7a88857579..a3ac9cbeabad1 100644
> --- a/drivers/pinctrl/qcom/pinctrl-sdm845.c
> +++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c
> @@ -1287,6 +1287,9 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = {
>  	.ngpios = 150,
>  };
>  
> +static SIMPLE_DEV_PM_OPS(sdm845_pinctrl_dev_pm_ops, msm_pinctrl_suspend,
> +			 msm_pinctrl_resume);

I don't expect this to differ between the various platforms, so how
about moving it to pinctrl-msm?

Regards,
Bjorn

> +
>  static int sdm845_pinctrl_probe(struct platform_device *pdev)
>  {
>  	return msm_pinctrl_probe(pdev, &sdm845_pinctrl);
> @@ -1300,6 +1303,7 @@ static const struct of_device_id sdm845_pinctrl_of_match[] = {
>  static struct platform_driver sdm845_pinctrl_driver = {
>  	.driver = {
>  		.name = "sdm845-pinctrl",
> +		.pm = &sdm845_pinctrl_dev_pm_ops,
>  		.of_match_table = sdm845_pinctrl_of_match,
>  	},
>  	.probe = sdm845_pinctrl_probe,
> -- 
> 2.16.4
>