Hi peter,
On 17/06/2014 00:19, Marek Vasut wrote:
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.schumann@jeepxj.de
+CC Fabio, I'd like to see his take on this too.
Reviewed-by: Marek Vasut marex@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 ...
Agree. Reason is that this change is for all boards, and without a proper testing I will avoid to merge it in the release.
Best regards, Stefano Babic