From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Tue, 26 Mar 2013 12:36:14 +0000 (+0900)
Subject: mmc: dw_mmc: control the power-enable register
X-Git-Tag: v3.10-rc1~96^2~21
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=4366dcc52a43746066e43c3eb8b3c5e0cca2e6f6;p=linux.git

mmc: dw_mmc: control the power-enable register

When card is power-on/off, need to control the power-enable register.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 753c55c20c54..c6caedc2e847 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -821,11 +821,17 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		/* Power up slot */
 		if (slot->host->pdata->setpower)
 			slot->host->pdata->setpower(slot->id, mmc->ocr_avail);
+		regs = mci_readl(slot->host, PWREN);
+		regs |= (1 << slot->id);
+		mci_writel(slot->host, PWREN, regs);
 		break;
 	case MMC_POWER_OFF:
 		/* Power down slot */
 		if (slot->host->pdata->setpower)
 			slot->host->pdata->setpower(slot->id, 0);
+		regs = mci_readl(slot->host, PWREN);
+		regs &= ~(1 << slot->id);
+		mci_writel(slot->host, PWREN, regs);
 		break;
 	default:
 		break;