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

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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>
This commit is contained in:
Jerry Huang 2012-05-17 23:57:02 +00:00 committed by Andy Fleming
parent d2d8afae33
commit 975324a7d9
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/fsl_esdhc.c
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@ -543,6 +543,9 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
/* 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;