Hi, On Sat, Dec 13, 2014 at 9:58 PM, Hans de Goede <hdego...@redhat.com> wrote: > Hi, > > On 09-12-14 13:31, Chen-Yu Tsai wrote: > > <snip> > >> Also I have a schematic file for A23 that someone provided me. >> I don't remember who... >> >> It lists: >> - ALDO2 connected to VCC-DLL @ 2.5V >> - ALDO3 to VCC-PLL and AVCC (analog power) @ 3.0V >> - DCDC1 to all the normal stuff @ 3V >> - DCDC2 to VDD-SYS @ 1.1V >> - DCDC3 to VDD-CPU (main cpu) @ 1.1V (1.26V in my fex file) >> - DCDC5 to VCC-DRAM @ 1.1V (1.5V in my fex file) >> - DC5LDO to VDD-CPUS (special cpu) > > > Thanks for this info! > > I've prepared a sun8i / A23 set for u-boot which I'll send upstream > as soon as I've verified that it does not break A31 support. > > One thing which I've done is make u-boot explicitly disable power > outputs which are unused, the specific target for this is DCDC4 > which is enabled by default at power on and not used on sun8i. > > As a side effect this also disabled ALDO1 which is enabled at power > on too, and guess what, promptly my sdcard stopped working. > > So it seems that ALDO1 is hookedup to the sdcard on the Ippo > tablets, for now I've also enabled ALDO1 in the defconfig for V5, it would > be great if you could give my current sunxi-wip branch a try on your > V5 tablet, and if it works remove the setting of ALDO1 from the V5 > defconfig and then try again. If it is like my V1.2 then it will > stop booting when the SPL tries to load u-boot from the sdcard.
I missed that one. ALDO1 is connected to VCC-IO (pin controller I think), VCC-PD (whatever that is, it isn't on the datasheet, but the schematic implies it's part of the LCD block), VCC-USB (USB block in the SoC), VCC-IO-WIFI (pull-ups and stuff for mmc wifi), and HPVCC (builtin headphone amp). Others I failed to mention: ELDO2 to DVDD1V8-CSI @ 1.8V GPIO0 to AVDD-CSI @ 2.8V DC1SW to VCC-LCD @ 3V (this is just a switchable output of DCDC1) Hope this helps. ChenYu _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
