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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230705093507.7458eada3ae05e0e1740a10e@hugovil.com>
Date:   Wed, 5 Jul 2023 09:35:07 -0400
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Pierluigi Passaro <pierluigi.p@...iscite.com>,
        Nate Drude <nate.d@...iscite.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Hugo Villeneuve <hvilleneuve@...onoff.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mn-var-som-symphony: fix USB OTG

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

> On Tue, Jul 4, 2023 at 6:50 PM Fabio Estevam <festevam@...il.com> wrote:
> >
> > On Tue, Jul 4, 2023 at 6:28 PM Hugo Villeneuve <hugo@...ovil.com> 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.