Hi, On Tue, Dec 9, 2014 at 2:53 AM, Hans de Goede <hdego...@redhat.com> wrote: > Hi, > > On 08-12-14 15:28, Chen-Yu Tsai wrote: >> >> On Mon, Dec 8, 2014 at 4:27 AM, Hans de Goede <hdego...@redhat.com> wrote: >>> >>> Hi, >>> >>> This is still a bit rough around the edges, I'll clean it up as >>> time permits and then post it upstream. >>> >>> In the mean time people interested can find $subject here: >>> https://github.com/jwrdegoede/u-boot-sunxi/commits/sunxi-wip >> >> >> Hopefully I'll get around to testing this. BTW, what tablet do >> you have? > > > I've an Ippo q8h v1.2, there are at least 2 differences from the > v5 you've. The dram clk speed and zq value are different, and the wifi > is different. The wifi does not matter for u-boot, but does mean we > need separate dtb files for the 2. > > My u-boot sunxi-wip branch has a defconfig for the v1.2, you should be > able to copy that over to the v5 defconfig, adjust dram clk and zq values > with the ones from the v5 fix, change v1.2 to v5 in the CONFIG_FDTFILE > setting and thats it. > > Let me know if this works, then I'll also include an update for the v5 > defconfig to enable the SPL when I send this upstream.
Just gave it a spin, and it works. The dram clock and zq can be found in sunxi-boards. Note that the actual settings fetched from stock u-boot has the highest bit of tpr13 set, disabling auto detection AFAICU. As you've not implemented that part, I used auto detection and it seems to work. The only problem I have now is it has no connectivity to the outside world lol. I would've liked a v2, with a Realtek USB WiFi chip. What chip does the v1.2 have? >>> ChenYu, this also has a mmc fix which you may find interesting, >>> it may explain some of the problems with mmc you've been having >>> on both the A80 board, as well as the A31 dev board you've. >> >> >> Yes. With that fix my Hummingbird A31 boots properly without >> raising DCDC1 to 3.3V. >> >> Thanks! I'll send the defconfig out later. > > > Good, so I guess this means that DCDC1 should be 3V for your board, > since that is what the factory firmware uses, right ? > > I guess it is time to make DCDC1 voltage configurable. 3V seems to be the lowest tolerable voltage for some bits. Making it 3.3V might be a bit better. But with my light usage, I don't see any stability issues. ChenYu _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot