From: Haibo Chen haibo.chen@nxp.com
[ Upstream commit af8fade4bd7bc7bf49851832a20166213e032978 ]
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 Link: https://lore.kernel.org/r/1582100757-20683-8-git-send-email-haibo.chen@nxp.c... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/sdhci-esdhc-imx.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index dccb4df465126..ca1566d4ccab1 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -1624,7 +1624,11 @@ 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) + return pinctrl_pm_select_sleep_state(dev); + + return ret; }
static int sdhci_esdhc_resume(struct device *dev) @@ -1632,6 +1636,10 @@ static int sdhci_esdhc_resume(struct device *dev) struct sdhci_host *host = dev_get_drvdata(dev); int ret;
+ ret = pinctrl_pm_select_default_state(dev); + if (ret) + return ret; + /* re-initialize hw state in case it's lost in low power mode */ sdhci_esdhc_imx_hwinit(host);