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>

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 105ffb18e2b9b6ef7c43155a1f10d04ef230d4d7..b6c969d2c8440571fb660d00415c714837e04c55 100644 (file)
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -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;