[PATCH v3 12/14] mmc: sdhci-esdhc-imx: restore pin state when resume back

[haibo.chen@nxp.com]

From: Haibo Chen <haibo.chen@nxp.com>

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@nxp.com>
---
 drivers/mmc/host/sdhci-esdhc-imx.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 106097cbd0d4..dedc067cd0dd 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1717,7 +1717,13 @@ 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)
+		if (pinctrl_pm_select_sleep_state(dev))
+			dev_warn(mmc_dev(host->mmc),
+			 "%s, failed to select sleep pin state!\n", __func__);
+
+	return ret;
 }
 
 static int sdhci_esdhc_resume(struct device *dev)
@@ -1725,6 +1731,10 @@ static int sdhci_esdhc_resume(struct device *dev)
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	int ret;
 
+	if (pinctrl_pm_select_default_state(dev))
+		dev_warn(mmc_dev(host->mmc),
+		 "%s, failed to select default pin state!\n", __func__);
+
 	/* re-initialize hw state in case it's lost in low power mode */
 	sdhci_esdhc_imx_hwinit(host);
 
-- 
2.17.1