Hi,
On 10-10-15 16:13, Chen-Yu Tsai wrote:
On Sat, Oct 3, 2015 at 10:26 PM, Hans de Goede <[email protected]> wrote:
Change the axp223 dcdc2 / VDD-SYS default from 1.2V to 1.1V, 1.1V is the
value recommended by Allwinner and is what most fex files specify.
This has been tested on a number of A23/A33 tablets including on an
A23 Ippo-q8h-v1.2 PCB tablet which has a fex file which specifies 1.2V
(which is where our original 1.2V default comes from).
Signed-off-by: Hans de Goede <[email protected]>
We should also be able to drop the VDD-SYS voltage for A31/A31s, which is
from DCDC4, as well.
The fex files do not agree with you all A31 fex files have it at either
1200 or 1240 mV.
Furthermore, DCDC2 on AXP221/sun6i is normally powering the GPU,
in spite of the reference design using it for the CPU.
Right, the Kconfig help for DCDC2 already contains:
On A31 boards dcdc2 is used for VDD-GPU and should be 1.2V.
Regards,
Hans
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