mmc: msm_sdhci: enable vqmmc at probe if available
On earlier platforms, the vqmmc regulator was enabled by the
previous bootloader, but on the newest (SM8650) it's not
and we need vqmmc to be enabled in order to have the card
to respond.
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/mmc/msm_sdhci.c b/drivers/mmc/msm_sdhci.c
index 4e5c932..27bb705 100644
--- a/drivers/mmc/msm_sdhci.c
+++ b/drivers/mmc/msm_sdhci.c
@@ -15,6 +15,7 @@
#include <asm/global_data.h>
#include <asm/io.h>
#include <linux/bitops.h>
+#include <power/regulator.h>
/* Non-standard registers needed for SDHCI startup */
#define SDCC_MCI_POWER 0x0
@@ -43,6 +44,7 @@
struct sdhci_host host;
void *base;
struct clk_bulk clks;
+ struct udevice *vqmmc;
};
struct msm_sdhc_variant_info {
@@ -163,6 +165,16 @@
if (ret)
return ret;
+ /* Get the vqmmc regulator and enable it if available */
+ device_get_supply_regulator(dev, "vqmmc-supply", &prv->vqmmc);
+ if (prv->vqmmc) {
+ ret = regulator_set_enable_if_allowed(prv->vqmmc, true);
+ if (ret) {
+ printf("Failed to enable the VQMMC regulator\n");
+ return ret;
+ }
+ }
+
var_info = (void *)dev_get_driver_data(dev);
if (!var_info->mci_removed) {
ret = msm_sdc_mci_init(prv);