Re: [PATCH 04/14] mmc: sdhci-esdhc-imx: restore pin state when resume back

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On 15/11/19 1:12 PM, haibo.chen@xxxxxxx wrote:
> From: Haibo Chen <haibo.chen@xxxxxxx>
> 
> In some low power mode, SoC will lose the pin state, so need to restore
> the pin state when resume back.
> 
> Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
> ---
>  drivers/mmc/host/sdhci-esdhc-imx.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 1c988d6a2433..25b01f059aca 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1623,7 +1623,11 @@ static int sdhci_esdhc_suspend(struct device *dev)
>  	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
>  		mmc_retune_needed(host->mmc);
>  
> -	return sdhci_suspend_host(host);
> +	ret = sdhci_suspend_host(host);
> +	if (!ret)
> +		pinctrl_pm_select_sleep_state(dev);

Error return?

> +
> +	return ret;
>  }
>  
>  static int sdhci_esdhc_resume(struct device *dev)
> @@ -1631,6 +1635,8 @@ static int sdhci_esdhc_resume(struct device *dev)
>  	struct sdhci_host *host = dev_get_drvdata(dev);
>  	int ret;
>  
> +	pinctrl_pm_select_default_state(dev);

Error return?

> +
>  	/* re-initialize hw state in case it's lost in low power mode */
>  	sdhci_esdhc_imx_hwinit(host);
>  
> 




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