From: Jaehoon Chung <jh80.chung@samsung.com>
To: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Cc: 'Chris Ball' <cjb@laptop.org>,
Seungwon Jeon <tgih.jun@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Will Newton <will.newton@gmail.com>,
James Hogan <james.hogan@imgtec.com>
Subject: [PATCH] mmc: dw-mmc: control the power-enable register
Date: Tue, 26 Mar 2013 21:36:14 +0900 [thread overview]
Message-ID: <5151963E.2020101@samsung.com> (raw)
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>
---
drivers/mmc/host/dw_mmc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index a443820..a32aab5 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;
--
1.7.9.5
next reply other threads:[~2013-03-26 12:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-26 12:36 Jaehoon Chung [this message]
2013-03-27 14:47 ` [PATCH] mmc: dw-mmc: control the power-enable register James Hogan
2013-04-04 5:47 ` Seungwon Jeon
2013-04-04 14:09 ` Chris Ball
2013-04-05 3:27 ` Jaehoon Chung
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