On Sat, May 17, 2014 at 10:58:20AM -0300, Fabio Estevam wrote: > On Sat, May 17, 2014 at 9:46 AM, Shawn Guo <shawn.guo@xxxxxxxxxxxxx> wrote: > > The commit e783c51 (ahci: imx: software workaround for phy reset issue > > in resume) calls imx_sata_phy_reset() to reset phy immediately after > > SATA MPLL is enabled. It seems working fine mostly, but fails in some > > case as below. > > > > ... > > ahci-imx 2200000.sata: failed to reset phy: -110 > > ahci-imx: probe of 2200000.sata failed with error -110 > > > > After talking to the designer, we learnt that when enabling i.MX6Q SATA > > MPLL, we need to wait 100us for it to settle down for safety. Add this > > required delay to fix above failure. > > > > Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxxxxx> > > On my sabresd board that was not connected to any sata disk I was > always getting the 'failed to reset phy' error. Damn. I never noticed that the error is even there when no SATA disk is attached. Sorry. > > With this patch the error goes away and the driver probes successfully. > > Tested-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx> Thanks. Shawn -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
