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

[Sumedha Widyadharma]

On February 13, 2013 at 5:58 PM Otavio Salvador <otavio at ossystems.com.br> wrote:

> 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?
 
Unfortunately not. I don't know u-boot. Does it set up the clocks for the I2C
bus?