On 27/03/2012 13:01, Dirk Behme wrote:
On 27.03.2012 12:25, Chang-Ming.Huang@freescale.com wrote:
From: Jerry Huang Chang-Ming.Huang@freescale.com
According to the card detection of p1/p2 paltform RM,
typo => platform
we should set SYSCTL[PEREN] to enable the clock. Otherwise, after booting the u-boot, and then inserting the SD card, the SD card can't be detected.
Signed-off-by: Jerry Huang Chang-Ming.Huang@freescale.com CC: Andy Fleming afleming@gmail.com
drivers/mmc/fsl_esdhc.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index a2f35e3..1682a79 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -491,6 +491,8 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) /* First reset the eSDHC controller */ esdhc_reset(regs);
- esdhc_write32(®s->sysctl, SYSCTL_PEREN);
If I read the iMX6 manual correctly, the SYSCTL_PEREN isn't implemented there.
In the copy I could put my hands, SYSCTL_PEREN is implemented for i.MX6. However, I do not know if this has an influence. ESDHC should be clocked with SDCLKEN, that is enabled by default on i.MX (both MX5 and MX6).
So this should be a NOP for iMX6?
However, if it is not implemented and it is marked as reserved, we should not set it.
Best regards, Stefano Babic