linux-kernel - Re: [Regression] "irqdomain: Don't set type when mapping an IRQ" breaks nexus7 gpio buttons

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Date:	Mon, 8 Aug 2016 23:35:52 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	John Stultz <john.stultz@...aro.org>,
	Jon Hunter <jonathanh@...dia.com>,
	Marc Zyngier <marc.zyngier@....com>,
	lkml <linux-kernel@...r.kernel.org>,
	Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: [Regression] "irqdomain: Don't set type when mapping an IRQ"
 breaks nexus7 gpio buttons

On Sat, Jul 30, 2016 at 10:07 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
> On Fri, 29 Jul 2016, John Stultz wrote:
>> Hey Jon,
>>   So after rebasing my nexus7 patch stack onto pre-4.8-rc1 tree, I
>> noticed the power/volume buttons stopped working.
>>
>> I did a manual rebased bisection and chased it down to your commit
>> 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ").
>>
>> Reverting that patch makes things work again, so I wanted to see if
>> there was any debugging info I could provide to try to help narrow
>> down the problem here. (Sorry, I'd tinker myself with it some and try
>> to debug the issue, but after burning my friday night on this, I'm
>> eager to get away from the keyboard for the weekend).
>
> dmesg should contain debug output which yells about non matching types. Can
> you provide that?

I had that problem *too* on the Qualcomm platforms (APQ8060, MSM8660
and the APQ8064 variants, but fixed it up with these two patches:
http://marc.info/?l=linux-arm-kernel&m=147038646226142&w=2

In addition to that there is some other problem, discussed in this
thread... I understand that less.

Yours,
Linus Walleij