On Mon, Feb 21, 2011 at 9:40 PM, Kishore Kadiyala <kishorek.kadiyala@xxxxxxxxx> wrote: > On Mon, Feb 21, 2011 at 11:37 AM, Anand Gadiyar <gadiyar@xxxxxx> wrote: >> The OMAP HSMMC driver uses an ocr_mask to determine the >> list of voltages supported by the card. It populates this >> mask based on the list of voltages supported by the >> regulator that supplies the voltage. >> >> Commit 64be97822b (omap4 hsmmc: Update ocr mask for MMC2 for >> regulator to use) passed a fixed ocr_mask from the OMAP4 SDP >> board file to limit the voltage to 2.9-3.0 Volts, and updated >> the driver to use this mask if provided, instead of using the >> regulator's supported voltages. >> >> However the commit is buggy - the ocr_mask is overridden >> by the regulator's capabilities anyway. Fix this. >> >> (The bug shows up when a system-wide suspend is attempted >> on the OMAP4 SDP/Blaze platforms. The eMMC card comes up >> at 3V, but drops to 1.65V after the system resumes). >> >> Signed-off-by: Anand Gadiyar <gadiyar@xxxxxx> > > Tested this patch on OMAP4430SDP & OMAP4 Blaze. > > Tested-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx> > Acked-by: Balaji T K <balajitk@xxxxxx> Can you this patch be queued? >> Cc: Kishore Kadiyala <kishore.kadiyala@xxxxxx> >> Cc: Tony Lindgren <tony@xxxxxxxxxxx> >> Cc: Madhusudhan Chikkature <madhu.cr@xxxxxx> >> Cc: Chris Ball <cjb@xxxxxxxxxx> >> --- >> Tony, Chris, >> >> This is only a partial fix. It fixes the obvious bug introduced >> in the commit I noted above, however it is not the final >> fix. I'm not convinced the way the regulators are handled >> in this driver is correct - I'm still studying the code and >> will come up with a proper fix later. >> >> However, this does fix a real bug and I believe the bug is >> obvious. Would be nice to get this into the -rc series if >> we still can. >> >> - Anand >> >> drivers/mmc/host/omap_hsmmc.c | 1 - >> 1 file changed, 1 deletion(-) >> >> Index: linux-2.6/drivers/mmc/host/omap_hsmmc.c >> =================================================================== >> --- linux-2.6.orig/drivers/mmc/host/omap_hsmmc.c >> +++ linux-2.6/drivers/mmc/host/omap_hsmmc.c >> @@ -413,7 +413,6 @@ static int omap_hsmmc_reg_get(struct oma >> return -EINVAL; >> } >> } >> - mmc_slot(host).ocr_mask = mmc_regulator_get_ocrmask(reg); >> >> /* Allow an aux regulator */ >> reg = regulator_get(host->dev, "vmmc_aux"); >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
