[meta-freescale] I2C issues with u-boot from fsl-community-bsp

[Otavio Salvador]

On Wed, Feb 13, 2013 at 2:35 PM, Sumedha Widyadharma <
Sumedha.Widyadharma at basyskom.com> wrote:

>
>
> On February 13, 2013 at 4:16 PM Otavio Salvador <otavio at ossystems.com.br>
> wrote:
>
> > On Wed, Feb 13, 2013 at 12:22 PM, Sumedha Widyadharma <
> > Sumedha.Widyadharma at basyskom.com> wrote:
> >
> > > On February 13, 2013 at 1:53 PM Otavio Salvador <
> otavio at ossystems.com.br>
> > > wrote:
> > >
> > > > On Wed, Feb 13, 2013 at 10:18 AM, Sumedha Widyadharma
> > > > <Sumedha.Widyadharma at 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


I don't have sabreauto here to test this.  Any clue?

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio at ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
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