On 03/28/2016 03:01 PM, Hans de Goede wrote: >> but unless there's a real need >> for me to verify this, >> I'll simply revert the u-boot patch and enjoy working GPIO. > > Given the entire discussion in this thread, I agree that fixing this > in u-boot > is best. But I do not see reverting the u-boot patch disabling ldo3/4 > by default > as the solution. ldo3/4 are unused on most boards, so disabling them > by default > clearly is the right thing todo IMHO.
I just checked the Banana Pi, which exposes ports from bank E on its CON1. Admittedly, that's the "Camera Serial Interface", but that connector is explicitly also labelled as supporting various GPIO pins: http://www.bananapi.org/p/product.html On the Cubietruck, there's also CN9, exposing some GPIO ports from bank G: https://linux-sunxi.org/Cubietech_Cubietruck Given that there tend to be crashes on re-enabling LDO3+LDO4 and many boards expose affected pins (not only for CSI!): wouldn't be it be the best to keep them enabled? FWIW, Olimex did reply to my inquiry regarding misleading pin names: https://github.com/OLIMEX/OLINUXINO/issues/35#issuecomment-202823804 > I see. We used this Allwinner document as original reference design: > a20_pad_std_v1_1.pdf @ sunxi > <http://dl.linux-sunxi.org/A20/a20_pad_std_v1_1.pdf> - if you inspect > the schematic you'd notice that the signals connected to E18 and E19 > are named respectively CSI1-VCC and CSI0-VCC. Hence, this is where the > wrong naming of our processor pins came from. I'll add the proposal > for correction for the future hardware revision of the boards affected. > > The difference between our boards and other boards come from the > simple fact that their designs use 3.3V cameras, while we followed the > original reference design and used 2.8V camera in A20-SOM-EVB (we even > used the same camera - GT2005). > Michael -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
