> -----Original Message----- > From: Shilimkar, Santosh [mailto:santosh.shilimkar@xxxxxx] > Sent: Tuesday, September 14, 2010 11:49 AM > To: Chikkature Rajashekar, Madhusudhan; 'kishore kadiyala' > Cc: linux-omap@xxxxxxxxxxxxxxx; tony@xxxxxxxxxxx; > khilman@xxxxxxxxxxxxxxxxxxx > Subject: RE: [PATCH 6/7] omap4: Workaround for CMD line reset. > > 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? > Yes. There is a TRM update lately that explains the procedure for CMD line reset changes in ES2. I will post that patch. Regards, Madhu > 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
