commit 4e3bfa025634bd3a688016f78e585f6ec60a3ea0
author Jerry Huang <Chang-Ming.Huang@freescale.com> Thu May 17 23:57:02 2012 +0000
committer Andy Fleming <afleming@freescale.com> Fri Jul 13 17:04:50 2012 -0500
tree a439b90bca1b5126a09cb7290d8323d0dab4af74
parent 15c9ad9b5f3bb1a2c25644cf65af9ebc357b3313

FSL/eSDHC: enable the clock to detect the SD card

For FSL low-end processors (VVN2.2), in order to detect the SD card,
we should enable PEREN, HCKEN and IPGEN to enable the clock.
Otherwise, after booting the u-boot, and then inserting the SD card,
the SD card can't be detected.
For SDHC VVN2.3 IP, these bits are reserved, and SDCLKEN is used.
And when accessing to these reserved bit, no any impact happened.

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
CC: Andy Fleming <afleming@gmail.com>
CC: Marek Vasut <marex@denx.de>
Signed-off-by: Andy Fleming <afleming@freescale.com>

drivers/mmc/fsl_esdhc.c

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 105ffb1..b6c969d 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -543,6 +543,9 @@
 	/* First reset the eSDHC controller */
 	esdhc_reset(regs);
 
+	esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
+				| SYSCTL_IPGEN | SYSCTL_CKEN);
+
 	mmc->priv = cfg;
 	mmc->send_cmd = esdhc_send_cmd;
 	mmc->set_ios = esdhc_set_ios;