imx8mp: issues getting dtb with pcie enabled to boot

[Sahaj Sarup]

Hi Simon,

On Sat, Jul 8, 2023, 06:36 Simon Glass <sjg at google.com> wrote:

> Hi,
>
> On Fri, 7 Jul 2023 at 14:34, Fabio Estevam <festevam at gmail.com> wrote:
> >
> > Adding Marcel and Francesco.
> >
> > On Fri, Jul 7, 2023 at 5:30 PM Sahaj Sarup <sahaj.sarup at linaro.org>
> wrote:
> > >
> > > Hi,
> > > I am working on the imxmp-verdin platform. One of the quirks with
> > > this particular som is that it uses an internal pcie_phy clock instead
> of
> > > an external one like most imx8mp boards do.
> > > To get this working on mainline linux, the way clocks are defined for
> the
> > > pcie_phy is
> > > `clocks = <&hsio_blk_ctrl>;`
> > > However this causes u-boot to completely fail to boot with this
> > > error `Device tree error at node '__symbols__'` .
>
> That looks like a strange error was found when trying to read the
> compatible string from the node. It wasn't -FDT_ERR_NOTFOUND. See
> lists_bind_fdt().
>
> Perhaps we need to ignore the __symbols__ node?
>

For now the fix seems to be `clocks = <&hsio_blk_ctrl 0>;`
This let's uboot proceed and pcie is working under linux as well.


> > >
> > > My end goal is to boot a generic arm image over pcie nvme, I don't
> know if
> > > this would be possible but atleast a compatible device tree would be a
> good
> > > starting point.
> > >
> > > Thanks.
>
> Regards,
> Simon
>