From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 3/6] MCI/Core: increase the transmission frequency while card detection
Date: Fri, 26 Apr 2013 11:31:49 +0200 [thread overview]
Message-ID: <1366968712-17851-4-git-send-email-jbe@pengutronix.de> (raw)
In-Reply-To: <1366968712-17851-1-git-send-email-jbe@pengutronix.de>
According to the SD card spec the detection can happen at 400 kHz
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
---
drivers/mci/mci-core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index a269aee..9aeaa4d 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -1371,7 +1371,8 @@ static int mci_card_probe(struct mci *mci)
}
mci_set_bus_width(mci, MMC_BUS_WIDTH_1);
- mci_set_clock(mci, 1); /* set the lowest available clock */
+ /* according to the SD card spec the detection can happen at 400 kHz */
+ mci_set_clock(mci, 400000);
/* reset the card */
rc = mci_go_idle(mci);
--
1.8.2.rc2
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next prev parent reply other threads:[~2013-04-26 9:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-26 9:31 Some fixes and improvements while working with the Chumby Juergen Beisert
2013-04-26 9:31 ` [PATCH 1/6] MXS/MCI: add forgotten header file Juergen Beisert
2013-04-26 9:31 ` [PATCH 2/6] MXS/MCI: don't touch variables in the host structure Juergen Beisert
2013-04-26 9:31 ` Juergen Beisert [this message]
2013-04-26 9:31 ` [PATCH 4/6] MCI/Core: honor transmission limits at the card's side Juergen Beisert
2013-04-26 9:31 ` [PATCH 5/6] MCI/MXS: report a better matching error code when the transfer fails Juergen Beisert
2013-04-26 9:31 ` [PATCH 6/6] MCI/Core: move an ugly ifdef to the header file Juergen Beisert
2013-04-26 22:04 ` Sascha Hauer
2013-04-26 22:08 ` Some fixes and improvements while working with the Chumby Sascha Hauer
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