[U-Boot] [PATCH 0/9] rockchip: cosmetics, a fix and first steps on the rk3188

[Simon Glass]

Hi Heiko,

On 17 July 2016 at 09:20, Heiko Stübner <heiko at sntech.de> wrote:
> Am Sonntag, 17. Juli 2016, 08:14:06 schrieb Simon Glass:
>> Hi Heiko,
>>
>> On 15 July 2016 at 16:17, Heiko Stuebner <heiko at sntech.de> wrote:
>> > I've made some nice progress on using mainline uboot on the rk3188
>> > and would like to dump some first results.
>> >
>> > Right now I can use uboot on the rk3188 with the Rockchip binary ddr init,
>> > similar to what barebox does and can even netboot a kernel image using
>> > a usb ethernet adapter [0] .
>> >
>> > While working on this I found quite some cosmetic stuff that shouldn't
>> > persist to make extending easier. So while I don't know what the policy
>> > is for my standalone pinctrl and clock drivers (without the actual board)
>> > at least the cosmetics + fix might get in at least.
>>
>> Nice work!
>>
>> It would be best to add the drivers with the board - otherwise they
>> are just dead code. How far away is it?
>
> The big issue is the SPL. Right now I'm using Rockchip's ddr-init as spl-
> replacement, and I'd say this second part is nearly ready - only minor
> cleanups.
>
> The memory-setup is supposed to be very much similar to the rk3288 (same
> dw_upctl and ddr-phy), but it looks like the very first steps are somewhat
> different and I haven't been able to make the spl output anything on the
> serial console yet ... which could stem from some difference in what the soc
> expects or just some dumb mistake on my part :-)

That's always tricky.

You may already know this, but the EARLY_UART setting is used on
rk3288 to display a character as soon as SPL starts. You might be able
to do something similar. The main issue I had was getting the pinmux
setting right.

As a test, you can start with booting SPL from the ddr-init binary I
suspect. I have not tried it but it should work. Then the pinmux
should already be set up (since ddr-init outputs to serial).

Regards,
Simon