Hi Heiko and Simon,
Thank you both for your help, I really appreciate it.
No, I do not have the Linux mainline running yet as I was focusing on getting the mainline u-boot running since I saw some references that implied I may need that to use the mainline Linux. I did try the mainline kernel with the vendor-fork u-boot but got nothing pas the "Loading Linux...." line from u-boot.
I think what I will probably do is take the easy way out and use the vendor-fork u-boot since that boots on this hardware.
But since I've invested some amount of time in the mainline u-boot and it's drinving me mad that I can't seem to figure out what's wrong, I do have one last question (hopefully).
I've got mainline u-boot getting this far (I added debug to show what GPIO0 and 2 are outputting).
-------------------- U-Boot SPL 2016.11-00138-g136179b-dirty (Nov 28 2016 - 13:29:59) Trying to boot from MMC1 Card did not respond to voltage select! GPIO0=0x0 GPIO2=0x0 ... --------------------
I've modified rk3288-firefly.dts (the closest thing to hardware I have) to set the eMMC reset line high but as you see above, nothing is set on any GPIO. This leads me to believe that I do not understand how the device tree is loaded/used in SPL. Can anyone point me to help on whether I should use u-boot-spl-nodtb or u-boot-spl-dtb (I've tried both) or how to debug if I am in fact even reading my dtb.
Thanks again,
Rick
PS. My Makefile is here if you are so inclined: http://members.efn.org/~rick/pub/Makefile See the targets u-boot-denx and uboot_new_flash to see what I've tried.
From heiko@sntech.de Tue Nov 29 08:45:02 2016 To: u-boot@lists.denx.de Cc: Simon Glass sjg@chromium.org, Rick Bronson rick@efn.org,
"eddie.cai" eddie.cai@rock-chips.com, linux-rockchip@lists.infradead.org
Subject: Re: [U-Boot] Rockchip RK3288 u-boot with mainline kernel Date: Tue, 29 Nov 2016 11:20:52 +0100
Hi Rick,
Am Montag, 28. November 2016, 15:09:05 schrieb Simon Glass:
- A few rockchip people and linux-rockchip
Hi Rick,
On 25 November 2016 at 11:20, Rick Bronson rick@efn.org wrote:
Hi All,
I've got unsupported RK3288 hardware running the latest git u-boot to
SPL as explained in http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.rockchip. My goal is to run the mainline (ie. not Android) Linux kernel on this hardware
and wondered:
- Do I need to get the latest git u-boot to run before I can run the
mainline kernel? Or can I use github.com/linux-rockchip/u-boot-rockchip.git, which I have running u-boot fully.
It's up to you - obviously mainline is where the development should be, but there is no requirement that I know of.
correct, the (mainline-)kernel runs just fine on both the vendor-fork of
uboot
as well as on mainline.
Does mainline run on your board?
- The device tree seems to be in two places, once via: resource_tool --image=resource2.img --pack linux/logo.bmp ${DTS}.dtb
that gets put into the resource file and then again at the end of the
kernel via CONFIG_ARM_APPENDED_DTB. Do I need both? When I do both I get things like:
Unknow param: MACHINE_MODEL:rk30sdk! Unknow param: MACHINE_ID:007!
ARM_APPEND_DTB is meant for boards where the bootloader cannot load the devicetree (to old or so) and also cannot be reasonably exchanged. So the append-mechanism was invented to allow bundling the devicetree with the
actual
kernel image, so that to the bootloader it looks like just any other kernel image.
So you essentially only need one or the other. Also at least mainline uboot also supports the FIT image type, where you can bundle the devicetree in a more generalized way.
For your message I would guess the kernel didn't find a usable devicetree somehow and was falling back to ATAGS-based board selection?