linux-kernel - Re: mxs_lradc_ts: Warning due to "0 is an invalid IRQ number"

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Date:   Tue, 21 Jun 2022 17:39:02 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Fabio Estevam <festevam@...il.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...el.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Marek Vasut <marex@...x.de>,
        Ksenija Stanojevic <ksenija.stanojevic@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: mxs_lradc_ts: Warning due to "0 is an invalid IRQ number"

Hi Fabio,

On 2022-06-21 17:23, Fabio Estevam wrote:
> Hi Marc,
> 
> On Tue, Jun 21, 2022 at 12:41 PM Marc Zyngier <maz@...nel.org> wrote:
> 
>> Something like the hack below could potentially make things less
>> broken, but I'm not holding my breath. If nobody cares, let's remove
>> the code altogether.
> 
> With your patch applied, the warning is gone, thanks.
> 
> The touchscreen is registered:
> 
> [    8.207461] input: mxs-lradc-ts as
> /devices/soc0/80000000.apb/80040000.apbx/80050000.lradc/mxs-lradc-ts/input/input0
> 
> but when I run  "cat /dev/input/event0" and touch the screen, no irq
> event is generated.
> 
> Looking at cat /proc/interrupts shows that no mxs-lradc-touchscreen
> irq happened:
> 
> 216:          0         -  10 Edge      mxs-lradc-touchscreen

I'm not sure I can help you further on that. '10' seems to be
the correct interrupt for the interrupt number (irq index 0 in
the lradc device).

You'll have to debug it further, I'm afraid.

         M.
-- 
Jazz is not dead. It just smells funny...