mmc: dm: get the IO-line and main voltage regulators from the dts

Get a reference to the regulator devices from the dts and store them
in the struct mmc for later use.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

drivers/mmc/mmc.c

@@ -1618,22 +1618,26 @@ __weak void board_mmc_power_init(void)
 static int mmc_power_init(struct mmc *mmc)
 {
 #if CONFIG_IS_ENABLED(DM_MMC)
-#if defined(CONFIG_DM_REGULATOR) && !defined(CONFIG_SPL_BUILD)
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
-	struct udevice *vmmc_supply;
 	int ret;
 
 	ret = device_get_supply_regulator(mmc->dev, "vmmc-supply",
-					  &vmmc_supply);
+					  &mmc->vmmc_supply);
-	if (ret) {
+	if (ret)
 		debug("%s: No vmmc supply\n", mmc->dev->name);
-		return 0;
-	}
 
-	ret = regulator_set_enable(vmmc_supply, true);
+	ret = device_get_supply_regulator(mmc->dev, "vqmmc-supply",
+					  &mmc->vqmmc_supply);
+	if (ret)
+		debug("%s: No vqmmc supply\n", mmc->dev->name);
+
+	if (mmc->vmmc_supply) {
+		ret = regulator_set_enable(mmc->vmmc_supply, true);
 		if (ret) {
 			puts("Error enabling VMMC supply\n");
 			return ret;
 		}
+	}
 #endif
 #else /* !CONFIG_DM_MMC */
 	/*

include/mmc.h

@@ -457,6 +457,10 @@ struct mmc {
 	int ddr_mode;
 #if CONFIG_IS_ENABLED(DM_MMC)
 	struct udevice *dev;	/* Device for this MMC controller */
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
+	struct udevice *vmmc_supply;	/* Main voltage regulator (Vcc)*/
+	struct udevice *vqmmc_supply;	/* IO voltage regulator (Vccq)*/
+#endif
 #endif
 };