MINIARM: HACK: switch vccio_sd to 3.3v while shutdowning

Change-Id: I80d6d2b61b31f16b6b42b9ffcaab077231a7a91c
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>

Author: Ziyuan Xu

drivers/mmc/host/dw_mmc-rockchip.c

@@ -13,6 +13,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/dw_mmc.h>
 #include <linux/of_address.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 
 #include "dw_mmc.h"
@@ -285,6 +286,15 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
 	return dw_mci_pltfm_register(pdev, drv_data);
 }
 
+static void dw_mci_rockchip_platfm_shutdown(struct platform_device *pdev)
+{
+	struct dw_mci *host = platform_get_drvdata(pdev);
+	struct mmc_host *mmc = host->cur_slot->mmc;
+
+	if (!IS_ERR(mmc->supply.vqmmc))
+		regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int dw_mci_rockchip_suspend(struct device *dev)
 {
@@ -308,6 +318,7 @@ static SIMPLE_DEV_PM_OPS(dw_mci_rockchip_pmops,
 static struct platform_driver dw_mci_rockchip_pltfm_driver = {
 	.probe		= dw_mci_rockchip_probe,
 	.remove		= dw_mci_pltfm_remove,
+	.shutdown	= dw_mci_rockchip_platfm_shutdown,
 	.driver		= {
 		.name		= "dwmmc_rockchip",
 		.of_match_table	= dw_mci_rockchip_match,