Hi Heiko,
On 17 July 2016 at 09:27, Simon Glass sjg@chromium.org wrote:
Hi Heiko,
On 17 July 2016 at 09:20, Heiko Stübner heiko@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@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).
I'm going to apply the earlier patches in your series. Once you have a working board we can apply the rest (to avoid adding dead code).
Regards, Simon