From: Seungwon Jeon <tgih.jun@samsung.com>
To: linux-mmc@vger.kernel.org
Cc: 'Chris Ball' <cjb@laptop.org>, linux-samsung-soc@vger.kernel.org
Subject: [PATCH] mmc: dw_mmc: Clear the DDR mode for non-DDR
Date: Mon, 02 Jan 2012 16:00:02 +0900 [thread overview]
Message-ID: <000b01ccc91c$26cf0330$746d0990$%jun@samsung.com> (raw)
In-Reply-To:
UHS_REG should be cleared for non-DDR mode. But currently there is
no way to clear DDR mode, if it is already set once. This patch adds
clearing DDR mode for non-DDD mode.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
---
drivers/mmc/host/dw_mmc.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index c583b94..94e2238 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -707,12 +707,15 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
break;
}
+ regs = mci_readl(slot->host, UHS_REG);
+
/* DDR mode set */
- if (ios->timing == MMC_TIMING_UHS_DDR50) {
- regs = mci_readl(slot->host, UHS_REG);
+ if (ios->timing == MMC_TIMING_UHS_DDR50)
regs |= (0x1 << slot->id) << 16;
- mci_writel(slot->host, UHS_REG, regs);
- }
+ else
+ regs &= ~(0x1 << slot->id) << 16;
+
+ mci_writel(slot->host, UHS_REG, regs);
if (ios->clock) {
/*
--
1.7.0.4
next reply other threads:[~2012-01-02 7:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-02 7:00 Seungwon Jeon [this message]
2012-01-03 10:29 ` [PATCH] mmc: dw_mmc: Clear the DDR mode for non-DDR Will Newton
2012-01-05 3:32 ` Chris Ball
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='000b01ccc91c$26cf0330$746d0990$%jun@samsung.com' \
--to=tgih.jun@samsung.com \
--cc=cjb@laptop.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox