From: Anton Vorontsov <avorontsov@ru.mvista.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Ben Dooks <ben@fluff.org>,
linux-kernel@vger.kernel.org, sdhci-devel@lists.ossman.eu,
linuxppc-dev@ozlabs.org, Pierre Ossman <pierre@ossman.eu>
Subject: [PATCH 1/4] sdhci-of: Fix SD clock calculation
Date: Fri, 7 Aug 2009 20:40:57 +0400 [thread overview]
Message-ID: <20090807164057.GA13464@oksana.dev.rtsoft.ru> (raw)
In-Reply-To: <20090807163940.GA29192@oksana.dev.rtsoft.ru>
Linear divisor's values in a register start at 0 (zero means
"divide by 1"). Before this patch the code didn't account that
fact, so SD cards were running underclocked.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/mmc/host/sdhci-of.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c
index 9088443..92b5667 100644
--- a/drivers/mmc/host/sdhci-of.c
+++ b/drivers/mmc/host/sdhci-of.c
@@ -136,6 +136,7 @@ static void esdhc_set_clock(struct sdhci_host *host, unsigned int clock)
}
pre_div >>= 1;
+ div--;
setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, ESDHC_CLOCK_IPGEN |
ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN |
--
1.6.3.3
next prev parent reply other threads:[~2009-08-07 16:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-07 16:39 [PATCH 0/4] sdhci-of: Some fixes for high-speed and 4-bit SD cards Anton Vorontsov
2009-08-07 16:40 ` Anton Vorontsov [this message]
2009-08-07 16:49 ` [PATCH 2/4] sdhci-of: Avoid writing reserved bits into host control register Anton Vorontsov
2009-08-07 16:50 ` [PATCH 3/4] sdhci-of: Fix high-speed cards recognition Anton Vorontsov
2009-08-07 17:08 ` David Vrabel
2009-08-07 18:43 ` Anton Vorontsov
2009-08-07 16:50 ` [PATCH 4/4] sdhci-of: Cleanup eSDHC's set_clock() a little bit Anton Vorontsov
2009-08-07 18:41 ` [PATCH 0/4] sdhci-of: Some fixes for high-speed and 4-bit SD cards Anton Vorontsov
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=20090807164057.GA13464@oksana.dev.rtsoft.ru \
--to=avorontsov@ru.mvista.com \
--cc=akpm@linux-foundation.org \
--cc=ben@fluff.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=pierre@ossman.eu \
--cc=sdhci-devel@lists.ossman.eu \
/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;
as well as URLs for NNTP newsgroup(s).