On Tue, Apr 01, 2014 at 09:55:44PM +0200, Olliver Schinagl wrote: > On 03/31/2014 08:27 AM, Chen-Yu Tsai wrote: > >Hi Hans, > > > >On Sun, Mar 30, 2014 at 8:04 PM, Hans de Goede <[email protected]> wrote: > >>Hi, > >> > >>After wens pointed me to: > >>http://git.rhombus-tech.net/?p=u-boot.git;a=blob;f=arch/arm/cpu/armv7/sunxi/dram_sun6i.c;h=9275ca21ac99592c7d520a41c0914b359c27b913;hb=refs/heads/lichee/jb-4.2.2-a31 > >> > >>I've tried to get a full SPL going on sun6i. No luck sofar, > >>dropping in dram_sun6i.[c,h] +pll5 config seems to get the dram > >>going, at least get_ram_size() likes it. But I cannot get the > >>mmc to work in the SPL. I've narrowed this down to 2 problems, > >>which I believe are related: > >> > >>1) The mmc controller will simply not work with pll6 as source, > >>after adding a test for the pll6 lock bit I believe this is caused > >>by pll6 never locking. > >> > >>2) When switching the mmc controller clocksource to OSC24M, then > >>it does work, but gets stuck reading the first sector from the card. > >>I believe this happens because the card is only being supplied 3.0V' > >>rather then 3.3V. > >> > >>Note that the same code works fine in the no SPL u-boot when loaded > >>through boot0 + boot1. > >> > >>Likely wrong power supply voltages are the culprit in both cases > >>(the A31 also has a vdd-pll power pin. > >> > >>So it looks like the next step is to first get the pmic going in > >>u-boot (which will be useful even if booted through boot0 + 1, to > >>enable the nic-phy if nothing else). > > > >The A23 lichee u-boot has drivers for P2WI (used in sun6i) and RSB > >(reduced serial bus, used on A23): > Are they not the same? I haven't looked I admit, I just figured they > changed the name a little to make it sound distinctive.
We don't have much details, but the bus itself looks different, since it supports many devices, which is impossible with the p2wi. > Are they similar at all? If so, I guess that the i2c vs p2wi > discussion held a few days ago is moot then :) Why so? -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
signature.asc
Description: Digital signature
