Re: I2C issues with u-boot from fsl-community-bsp

* Re: I2C issues with u-boot from fsl-community-bsp
@ 2013-02-13 16:35 Sumedha Widyadharma
  2013-02-13 16:58 ` Otavio Salvador
  0 siblings, 1 reply; 11+ messages in thread
From: Sumedha Widyadharma @ 2013-02-13 16:35 UTC (permalink / raw)
  To: Otavio Salvador; +Cc: meta-freescale

On February 13, 2013 at 4:16 PM Otavio Salvador <otavio@ossystems.com.br> wrote:

> On Wed, Feb 13, 2013 at 12:22 PM, Sumedha Widyadharma <
> Sumedha.Widyadharma@basyskom.com> wrote:
>
> > On February 13, 2013 at 1:53 PM Otavio Salvador <otavio@ossystems.com.br>
> > wrote:
> >
> > > On Wed, Feb 13, 2013 at 10:18 AM, Sumedha Widyadharma
> > > <Sumedha.Widyadharma@basyskom.com> wrote:
> > > > I have an issue with I2C not working when using a fsl-community-bsp
> > (danny
> > > > branch) built u-boot on imx6qsabreauto.
> > > >
> > > > I'm pretty sure it has to do with u-boot because using the kernel and
> > rootfs
> > > > built by fsl-community-bsp with the u-boot from the 1.1.0 BSP I2C
> > works.
> > > >
> > > > For now I'm just doing that, using u-boot from the BSP and our
> > > > kernel/rootfs,
> > > > but I'd really like to be able to use the sdcard images.
> > > >
> > > > Is this a known problem?
> > > > Any u-boot flavours/configurations I could try?
> > >
> > > You can use the u-boot-imx together with the Yocto; but in any case
> > > can you provide a test we can do so we fix it in U-Boot mainline?
> >
> > I'm building a new image with u-boot-imx right now.
> > The u-boot-imx recipe had an error which I worked around with a
> > do_compile_append rename from u-boot.bin to u-boot.imx, probably not the
> > right
> > fix.
> >
> > What can I do to help fix this? Our most basic test is to run "i2cdetect
> > 2".
> > With the BSP u-boot we see the devices, with the yocto u-boot we see only
> > UU
> > where drivers have claimed addresses, but no actual devices.
>
>
> This won't work. I will send a patch updating the u-boot-imx with proper
> fix.
>
>
> > I'll report back once the image is done.
> >
>
> I think it won't boot. 

...and it didn't.

To sum up the results so far:

Adding UBOOT_SUFFIX/UBOOT_PADDING/PREFERRED_PROVIDER as per the u-boot-imx
recipe leads to a booting sdcard image
with working I2C.

Additionally i found out that u-boot-imx does not know if/then/else :)

I've booted both images and here are the i2cdump outputs:
https://gist.github.com/anonymous/4945858

>
>
> --
> Otavio Salvador                             O.S. Systems
> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br--
Sumedha Widyadharma
System Integrator

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