[U-Boot] [PATCH 0/4] dm: rpi: Move Raspberry Pi to use driver model

[Stephen Warren]

On 10/25/2014 09:47 PM, Simon Glass wrote:
> Hi Stephen,
> 
> On Oct 25, 2014 9:43 PM, "Stephen Warren" <swarren at wwwdotorg.org
> <mailto:swarren at wwwdotorg.org>> wrote:
>>
>> On 10/21/2014 08:04 PM, Simon Glass wrote:
>> > Hi Stephen,
>> >
>> > On 20 October 2014 20:23, Stephen Warren <swarren at wwwdotorg.org
> <mailto:swarren at wwwdotorg.org>> wrote:
>> >> On 10/19/2014 09:14 PM, Simon Glass wrote:
>> >>> Hi Stephen,
>> >>>
>> >>> On 17 October 2014 20:51, Stephen Warren <swarren at wwwdotorg.org
> <mailto:swarren at wwwdotorg.org>> wrote:
>> >>>> On 09/30/2014 07:41 PM, Stephen Warren wrote:
>> >>>>> On 09/22/2014 05:30 PM, Simon Glass wrote:
>> >>>>>> This series adds driver model support to the GPIO and serial
> drivers used
>> >>>>>> by Raspberry Pi, and moves Raspberry Pi over to driver model.
>> >>>>>>
>> >>>>>> This requires adding driver model support to the pl01x serial
> driver, and
>> >>>>>> replacing the bcm2835 GPIO driver with a driver model version
> (since there
>> >>>>>> are no longer clients that don't use driver model).
>> >>>>>>
>> >>>>>> See u-boot-dm.git branch rpi-working for the tree this is based on.
>> >>>>>
>> >>>>> The series,
>> >>>>> Tested-by: Stephen Warren <swarren at wwwdotorg.org
> <mailto:swarren at wwwdotorg.org>>
>> >>>>
>> >>>> Hmm. I take that back. Patch 4 causes a problem, at least when
> applied
>> >>>> on top of u-boot/master from today.
>> >>>>
>> >>>> Basic serial output works just fine, and I can interact with U-Boot
>> >>>> without issue. However, when the boot scripts execute and load an
>> >>>> extlinux.conf, U-Boot hangs. Up to patch 3, everything is fine.
>> >>>>
>> >>>> U-Boot 2014.10-00004-g7830ed7 (Oct 17 2014 - 20:47:19)
>> >>>>
>> >>>> DRAM:  480 MiB
>> >>>> WARNING: Caches not enabled
>> >>>> MMC:   bcm2835_sdhci: 0
>> >>>> Using default environment
>> >>>>
>> >>>> In:    serial
>> >>>> Out:   lcd
>> >>>> Err:   lcd
>> >>>> reading /uEnv.txt
>> >>>> 24 bytes read in 14 ms (1000 Bytes/s)
>> >>>> Hit any key to stop autoboot:  0
>> >>>> switch to partitions #0, OK
>> >>>> mmc0 is current device
>> >>>> Scanning mmc 0...
>> >>>> Found /extlinux/extlinux.conf
>> >>>> Retrieving file: /extlinux/extlinux.conf
>> >>>> reading /extlinux/extlinux.conf
>> >>>> (U-Boot hangs here)
>> >>>>
>> >>>
>> >>> Can you please point me to where I can get an image to try this with?
>> >>> Also did you check with dm/next? There may be dependent patches,
>> >>> although the nature of the problem suggests not.
>> >>
>> >> I use (a pretty old version of, but I doubt that matters) RPi
>> >> Foundation's Raspbian image, and compiled the kernel and U-Boot
>> >> according to:
>> >>
>> >>
> http://elinux.org/index.php?title=RPi_Upstream_Kernel_Compilation&oldid=351104
>> >>
>> >> http://elinux.org/RPi_U-Boot
>> >>
>> >
>> > I installed the Raspbian image but I don't get uImg.txt nor the same
>> > boot sequence. I am able to boot a kernel though.
>> >
>> > Do you have your settings or images uploaded somewhere? Also please
>> > confirm you used dm/next.
>>
>> FWIW, the content in the following branches does seem to work:
>>
>> u-boot/master
>> 5b3ee38 kbuild: clear VENDOR variable to fix build error on tcsh
>>
>> u-boot-dm/master
>> c2ded96 serial: remove uniphier_serial_initialize() call
>>
> 
> In what way?

I ran U-Boot, and let it boot a kernel via extlinux.conf.

Note that I said it worked, not that it failed.