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. Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
