[U-Boot] [PATCH 1/2] ARM: mxs: Enable DCDC converter for battery boot

[Michael Thalmeier]

Hi Marek, and Fabio

> > Shouldn't this be conditional?
> > 
> > #if defined CONFIG_MXS_ENABLE_4P2
> > mxs_power_enable_4p2();
> > #endif
> > 
> > Then the boards that need this power supply enable
> > CONFIG_MXS_ENABLE_4P2 in its config file.
> 
> No, we want to start the DCDC converter unconditionally when running on
battery 
> power to increase efficiency.
> 

I just stumbled upon this, because our board does not boot reliably any more
with this change.
Perhaps we have a special situation in that our board is powered via
DCDC_BATT only by an external power source (no battery).

I am currently working on creating a patch to only conditionally enabling
this feature, or to enable it by default and have it conditionally be
disabled for boards that are known to have problems with this.

Which approach seems to be more feasible to you?

Regards Michael