[PATCH] pwm: imx-tpm: Enable pinctrl setting for sleep state

[Shenwei Wang]

> -----Original Message-----
> From: Shenwei Wang <shenwei.wang at nxp.com>
> Sent: Tuesday, May 14, 2024 3:06 PM
> To: Uwe Kleine-König <ukleinek at kernel.org>; Shawn Guo
> <shawnguo at kernel.org>; Sascha Hauer <s.hauer at pengutronix.de>
> Cc: Pengutronix Kernel Team <kernel at pengutronix.de>; Fabio Estevam
> <festevam at gmail.com>; linux-pwm at vger.kernel.org; imx at lists.linux.dev;
> linux-arm-kernel at lists.infradead.org; dl-linux-imx <linux-imx at nxp.com>;
> Shenwei Wang <shenwei.wang at nxp.com>
> Subject: [PATCH] pwm: imx-tpm: Enable pinctrl setting for sleep state
> 
> Apply the pinctrl setting of sleep state when system enters suspend state.
> Restore to the default pinctrl setting when system resumes.
> 

Ping @Uwe

Thanks,
Shenwei

> Signed-off-by: Shenwei Wang <shenwei.wang at nxp.com>
> ---
>  drivers/pwm/pwm-imx-tpm.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c index
> c50ddbac43c8..19245790c67c 100644
> --- a/drivers/pwm/pwm-imx-tpm.c
> +++ b/drivers/pwm/pwm-imx-tpm.c
> @@ -393,7 +393,7 @@ static int pwm_imx_tpm_suspend(struct device *dev)
> 
>  	clk_disable_unprepare(tpm->clk);
> 
> -	return 0;
> +	return pinctrl_pm_select_sleep_state(dev);
>  }
> 
>  static int pwm_imx_tpm_resume(struct device *dev) @@ -401,6 +401,10 @@
> static int pwm_imx_tpm_resume(struct device *dev)
>  	struct imx_tpm_pwm_chip *tpm = dev_get_drvdata(dev);
>  	int ret = 0;
> 
> +	ret = pinctrl_pm_select_default_state(dev);
> +	if (ret)
> +		return ret;
> +
>  	ret = clk_prepare_enable(tpm->clk);
>  	if (ret)
>  		dev_err(dev, "failed to prepare or enable clock: %d\n", ret);
> --
> 2.34.1