Madhu, > -----Original Message----- > From: Chikkature Rajashekar, Madhusudhan > Sent: Tuesday, September 14, 2010 9:28 PM > To: 'kishore kadiyala'; Shilimkar, Santosh > Cc: linux-omap@xxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; > khilman@xxxxxxxxxxxxxxxxxxx > Subject: RE: [PATCH 6/7] omap4: Workaround for CMD line reset. > > > > > -----Original Message----- > > From: kishore kadiyala [mailto:kishorek.kadiyala@xxxxxxxxx] > > Sent: Tuesday, September 14, 2010 10:47 AM > > To: Madhusudhan Chikkature; Santosh Shilimkar > > Cc: linux-omap@xxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; > > khilman@xxxxxxxxxxxxxxxxxxx > > Subject: Re: [PATCH 6/7] omap4: Workaround for CMD line reset. > > > > Hi Madhu, > > > > On Thu, Sep 9, 2010 at 4:53 PM, Santosh Shilimkar > > <santosh.shilimkar@xxxxxx> wrote: > > > From: Madhusudhan Chikkature <madhu.cr@xxxxxx> > > > > > > Add a delay after CMD line reset to accomdate the reset to complete. > > > The SYSCTL seems to reflect SRC immediately which might not really > > > be indicating the complete of reset. This is observed only with ES2.0 > > > silicon > > > > > > Signed-off-by: Madhusudhan Chikkature <madhu.cr@xxxxxx> > > > --- > > > drivers/mmc/host/omap_hsmmc.c | 8 ++++++++ > > > 1 files changed, 8 insertions(+), 0 deletions(-) > > > > > > diff --git a/drivers/mmc/host/omap_hsmmc.c > > b/drivers/mmc/host/omap_hsmmc.c > > > index 4a8776f..1c359f0 100644 > > > --- a/drivers/mmc/host/omap_hsmmc.c > > > +++ b/drivers/mmc/host/omap_hsmmc.c > > > @@ -986,6 +986,14 @@ static inline void > > omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, > > > (i++ < limit)) > > > cpu_relax(); > > > > > > + /* > > > + * On OMAP4 ES2 the SRC is zero in the first loop itself > > strangely > > > + * vs on ES1 it takes some time. > > > + * Could be a an issue on ES2 to indicate reset complete even > > before > > > + * it is complete. > > > + */ > > > + udelay(500); > > > > Since the above work around is applicable only for OMAP4 ES2 , > > shouldn't this udelay be avoided for other OMAP versions > > > I did not post this to Linux omap at all. What patch are you talking > about? > I have posted this patch on Tony and Kevin's request keeping the original author. This is needed to get MMC working on ES2.0 samples. Do you have fresh version of this patch? Regards, Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
