Re: [PATCH] arm64: dts: imx8mn-var-som-symphony: fix USB OTG

[Hugo Villeneuve]

On Tue, 4 Jul 2023 20:00:13 -0300
Fabio Estevam <festevam@xxxxxxxxx> wrote:

> On Tue, Jul 4, 2023 at 6:50 PM Fabio Estevam <festevam@xxxxxxxxx> wrote:
> >
> > On Tue, Jul 4, 2023 at 6:28 PM Hugo Villeneuve <hugo@xxxxxxxxxxx> wrote:
> >
> > > Hi Fabio,
> > > it is important to remember that on this board, like I explained
> > > before, the INTB pin is not connected to anything.
> > >
> > > It is only the ID pin (9) that is connected to the GPIO1_11 pin.
> >
> > Now I looked at the schematics and you are right.
> >
> > In this case, GPIO1_11 should not be represented as irq then.
> 
> Variscite added an "irq-is-id-quirk"  property on their tree to handle this:
> 
> https://github.com/varigit/linux-imx/commit/fbe6aa2a9c014fdb10b29a715a1be695dac60828

Hi Fabio,
what do you think of Variscite's patch, is it something
worth doing?

At least the comment is interesting about the different EVK board
versions: mine is v1.6, which confirms the connection of the ID pin to
the GPIO1_11 pin. This also means that old boards have a connection from
the IRQ pin to GPIO1_11, and for these older boards the DTS is probably
Ok as it is?

How can we support both configurations?

Hugo.