On 27/12/18 1:35 PM, BOUGH CHEN wrote:
> 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 984cc1a788cb..7cfcc8618e45 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1392,17 +1392,23 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
> static int sdhci_esdhc_suspend(struct device *dev)
> {
> struct sdhci_host *host = dev_get_drvdata(dev);
> + int ret;
>
> if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> mmc_retune_needed(host->mmc);
>
> - return sdhci_suspend_host(host);
> + ret = sdhci_suspend_host(host);
> + pinctrl_pm_select_sleep_state(dev);
Why select a sleep state even if the suspend fails?
> +
> + return ret;
> }
>
> static int sdhci_esdhc_resume(struct device *dev)
> {
> struct sdhci_host *host = dev_get_drvdata(dev);
>
> + pinctrl_pm_select_default_state(dev);
> +
> /* re-initialize hw state in case it's lost in low power mode */
> sdhci_esdhc_imx_hwinit(host);
>
>
