mmc: sdhci-msm: Set IO pins in low power state during suspend

Configure SDHC IO pins with low power configuration when the driver
is in suspend state.

Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Link: https://lore.kernel.org/r/1594213888-2780-2-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 333245c..5a33389 100644 (file)
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -15,6 +15,7 @@
 #include <linux/iopoll.h>
 #include <linux/regulator/consumer.h>
 #include <linux/interconnect.h>
+#include <linux/pinctrl/consumer.h>
 
 #include "sdhci-pltfm.h"
 #include "cqhci.h"
@@ -1353,6 +1354,19 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host,
                sdhci_msm_hs400(host, &mmc->ios);
 }
 
+static int sdhci_msm_set_pincfg(struct sdhci_msm_host *msm_host, bool level)
+{
+       struct platform_device *pdev = msm_host->pdev;
+       int ret;
+
+       if (level)
+               ret = pinctrl_pm_select_default_state(&pdev->dev);
+       else
+               ret = pinctrl_pm_select_sleep_state(&pdev->dev);
+
+       return ret;
+}
+
 static int sdhci_msm_set_vmmc(struct mmc_host *mmc)
 {
        if (IS_ERR(mmc->supply.vmmc))
@@ -1597,6 +1611,9 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
                        ret = sdhci_msm_set_vqmmc(msm_host, mmc,
                                        pwr_state & REQ_BUS_ON);
                if (!ret)
+                       ret = sdhci_msm_set_pincfg(msm_host,
+                                       pwr_state & REQ_BUS_ON);
+               if (!ret)
                        irq_ack |= CORE_PWRCTL_BUS_SUCCESS;
                else
                        irq_ack |= CORE_PWRCTL_BUS_FAIL;