VVN2.2/VVN2.3 is the vendor version number, that is the FSL SDHC IP verion.
Best Regards Jerry Huang > -----Original Message----- > From: Marek Vasut [mailto:ma...@denx.de] > Sent: Saturday, May 19, 2012 12:03 AM > To: Huang Changming-R66093 > Cc: u-boot@lists.denx.de; Andy Fleming > Subject: Re: [PATCH 2/2 v3] FSL/eSDHC: enable the clock to detect the SD > card > > Dear chang-ming.hu...@freescale.com, > > > From: Jerry Huang <chang-ming.hu...@freescale.com> > > > > For FSL low-end processors (VVN2.2) > > What's 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 > > VVN2.3 ? > > > , 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.hu...@freescale.com> > > CC: Andy Fleming <aflem...@gmail.com> > > CC: Marek Vasut <ma...@denx.de> > > --- > > changes for v2: > > - correct the typo > > changes for v3: > > - enable all clock bits for VVN2.3 and VVN2.2 > > - use funciton esdhc_setbits32 > > - tested on p1022ds, p1025rdb, p1020mbg-pc, mpc8536ds, p3041ds > > > > drivers/mmc/fsl_esdhc.c | 3 +++ > > 1 files changed, 3 insertions(+), 0 deletions(-) > > > > diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index > > a2f35e3..930a5c5 100644 > > --- a/drivers/mmc/fsl_esdhc.c > > +++ b/drivers/mmc/fsl_esdhc.c > > @@ -491,6 +491,9 @@ int fsl_esdhc_initialize(bd_t *bis, struct > > fsl_esdhc_cfg *cfg) /* First reset the eSDHC controller */ > > esdhc_reset(regs); > > > > + esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN > > + | SYSCTL_IPGEN | SYSCTL_CKEN); > > + > > mmc->priv = cfg; > > mmc->send_cmd = esdhc_send_cmd; > > mmc->set_ios = esdhc_set_ios; > > Best regards, > Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
