sdhci: add regulator support

This patch adds support for regulator API to sdhci core driver.
Regulators can be used to disable power in suspended state to reduce
dissipated energy.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c98315c197ed..ff070a309f8d 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -249,6 +249,8 @@ struct sdhci_host {
 
         const struct sdhci_ops  *ops;           /* Low level hw interface */
 
+        struct regulator        *vmmc;          /* Power regulator */
+
         /* Internal data */
         struct mmc_host         *mmc;           /* MMC structure */
         u64                     dma_mask;       /* custom DMA mask */