On Tuesday, June 17, 2014 at 12:18:55 AM, Marek Vasut wrote: > On Sunday, June 15, 2014 at 03:11:56 PM, Peter Schumann wrote: > > This patch makes it possible to boot from battery on olinuxino Boards > > from Olimex. > > > > We should not set DOUBLE_FETS in HW_POWER_MINPWR, it makes my system > > reset with in seconds while running on battery power. > > > > Also mxs_power_enable_4p2() should not be called if running from > > battery. It switches VDDD and VDDA to LinReg mode and than turns off > > the VDDIO DCDC supply. At this point the system resets. > > If we run on battery this is no good idea because the LinRegs are > > chained behind VDDIO and battery voltage seems not enough to power > > the system from LinRegs. > > Also is the power system already running on DCDC after BootROM hands > > over to u-boot, so no sense in switching back to LinRegs. > > > > Signed-off-by: Peter Schumann <peter.schum...@jeepxj.de> > > +CC Fabio, I'd like to see his take on this too.
Reviewed-by: Marek Vasut <ma...@denx.de> I'd like to get this merged after 2014.07 though, so it can get some proper testing. We're too late in the -rc cycle anyway ... Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot