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Date: Wed, 10 Oct 2018 00:53:37 -0700
From: Nathan Chancellor <natechancellor@gmail.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Greg KH <gregkh@linuxfoundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        stable <stable@vger.kernel.org>,
        Stephen Boyd <swboyd@chromium.org>,
        Doug Anderson <dianders@chromium.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: Re: [PATCH 4.4 093/113] pinctrl: msm: Really mask level interrupts
 to prevent latching
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On Wed, Oct 10, 2018 at 09:12:58AM +0200, Linus Walleij wrote:
> On Tue, Oct 9, 2018 at 8:33 AM Nathan Chancellor
> <natechancellor@gmail.com> wrote:
> 
> > Sigh, sorry, I caught this after I sent my initial all good email but
> > this commit breaks NFC on my Pixel 2 XL (toggle becomes greyed out and
> > apps that want to use it ask to enable it). I can't say why, I'm more
> > than happy to debug but I'm assuming it's some voodoo that Qualcomm has
> > done out of tree. I'll leave it up to you how to proceed given that I
> > can't run mainline :(
> 
> Which NFC driver is this?
> Just want to make sure it looks sane.
> 
> Yours,
> Linus Walleij

Hi Linus and Bjorn,

These two files should be it I believe:
https://android.googlesource.com/kernel/msm/+/android-9.0.0_r0.22/drivers/nfc/nq-nci.c
https://android.googlesource.com/kernel/msm/+/android-9.0.0_r0.22/drivers/nfc/ese/pn81a.c

Sorry I didn't get around to digging into this further today, I will try
to get to it in the morning.

Cheers,
Nathan