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authorShawn Guo <shawn.guo@linaro.org>2012-06-26 16:38:57 +0800
committerChris Ball <cjb@laptop.org>2012-07-22 15:25:35 -0400
commit4dc5a79f1350718ac31e4ab87eebce112b117a34 (patch)
tree85f02a2db2ed28aadba76357e9127bd49ab13952 /drivers/mmc/host
parentb63b5e819d5b21ae493c17c356018ffa98d3ee1c (diff)
downloadlinux-linaro-stable-4dc5a79f1350718ac31e4ab87eebce112b117a34.tar.gz
mmc: mxs-mmc: enable regulator for mmc slot
If bootloader or platform initialization code does not enable the power supply to mmc slot, we need to do it in mmc driver. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/mxs-mmc.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 277161d279b8..2247c50f9869 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -707,6 +707,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
struct pinctrl *pinctrl;
int ret = 0, irq_err, irq_dma;
dma_cap_mask_t mask;
+ struct regulator *reg_vmmc;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -747,6 +748,16 @@ static int mxs_mmc_probe(struct platform_device *pdev)
host->mmc = mmc;
host->sdio_irq_en = 0;
+ reg_vmmc = devm_regulator_get(&pdev->dev, "vmmc");
+ if (!IS_ERR(reg_vmmc)) {
+ ret = regulator_enable(reg_vmmc);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to enable vmmc regulator: %d\n", ret);
+ goto out_mmc_free;
+ }
+ }
+
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(pinctrl)) {
ret = PTR_ERR(pinctrl);