From: Chander Kashyap <chander.kashyap@linaro.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] s5p-mmc: Fix ambiguous setting of data transfer width
Date: Tue, 30 Aug 2011 16:25:31 +0530 [thread overview]
Message-ID: <1314701731-19099-1-git-send-email-chander.kashyap@linaro.org> (raw)
mmc data transfer width is set as following:
WIDE8[5]:
0 = Depend on WIDE4
1 = 8-bit mode
WIDE4[1]:
1 = 4-bit mode
0 = 1-bit mode
In case of 4-bit mode reset 8-bit mode and
in case of 1-bit mode reset 8-bit mode and 4-bit mode
Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
---
drivers/mmc/s5p_mmc.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/s5p_mmc.c b/drivers/mmc/s5p_mmc.c
index 7786ecf..6e6ad08 100644
--- a/drivers/mmc/s5p_mmc.c
+++ b/drivers/mmc/s5p_mmc.c
@@ -368,12 +368,16 @@ static void mmc_set_ios(struct mmc *mmc)
* 1 = 4-bit mode
* 0 = 1-bit mode
*/
- if (mmc->bus_width == 8)
+ if (mmc->bus_width == 8) {
ctrl |= (1 << 5);
- else if (mmc->bus_width == 4)
+ ctrl &= ~(1 << 1);
+ } else if (mmc->bus_width == 4) {
ctrl |= (1 << 1);
- else
+ ctrl &= ~(1 << 5);
+ } else {
ctrl &= ~(1 << 1);
+ ctrl &= ~(1 << 5);
+ }
/*
* OUTEDGEINV[2]
--
1.7.4.1
next reply other threads:[~2011-08-30 10:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 10:55 Chander Kashyap [this message]
2011-08-31 8:33 ` [U-Boot] [PATCH] s5p-mmc: Fix ambiguous setting of data transfer width Jaehoon Chung
2011-09-01 1:23 ` Andy Fleming
2011-09-01 2:26 ` Minkyu Kang
2011-09-01 5:51 ` Wolfgang Denk
2011-09-02 8:09 ` Minkyu Kang
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=1314701731-19099-1-git-send-email-chander.kashyap@linaro.org \
--to=chander.kashyap@linaro.org \
--cc=u-boot@lists.denx.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.