On Sun, Jan 11, 2015 at 5:38 PM, Ian Campbell ijc@hellion.org.uk wrote:
On Sat, 2015-01-03 at 10:17 +0800, Chen-Yu Tsai wrote:
ALDO2 is used to power LPDDR2 SDRAM on both the reference design and the Hummingbird A31, when this type of RAM is present.
Signed-off-by: Chen-Yu Tsai wens@csie.org
I think this one needs Hans' opinion more than mine, but looks OK to me with one small comment:
disable aldo2. On sun6i (A31) boards this is typically used for LPDDR2SDRAM, and should be set to 1.8V if present. On sun8i (A23) this istypically connected to VDD-DLL and must be set to 2.5V.It took me a while to work out why "set to 1.8V if present" wasn't reflected in the default (which you changed to zero in this patch), I think there is an implied "which is almost never" on the end? But that wouldn't be in keeping with the style of things. How about:
[...] On sun6i (A31) boards this is typically unused and should be disabled, if it is used for LPDDR2 it should be set to 1.8V. [...]?
Yes that does seem less confusing. A full stop after "disabled" would be even better.
config AXP221_ALDO3_VOLT int "axp221 aldo3 voltage"