linux-kernel - Re: [PATCH] pinctrl: cherryview: Do not mask all interrupts on probe

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Date:   Thu, 8 Sep 2016 18:13:03 +0800
From:   Phidias Chiang <phidias.chiang@...onical.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Anisse Astier <anisse@...ier.eu>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Yu C Chen <yu.c.chen@...el.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: cherryview: Do not mask all interrupts on probe

On Thu, Aug 18, 2016 at 04:58:13PM +0300, Mika Westerberg wrote:
> On Thu, Aug 18, 2016 at 03:52:57PM +0200, Anisse Astier wrote:
> > On Thu, Aug 18, 2016 at 2:13 PM, Mika Westerberg
> > <mika.westerberg@...ux.intel.com> wrote:
> > > On Wed, Aug 17, 2016 at 03:42:58PM +0200, Anisse Astier wrote:
> > >> pin 25 (GPIO_SUS6) GPIO ctrl0 0xec918201 ctrl1 0x05c00001
> > >
> > > It is this one (GPIO_SUS6).
> > >
> > > I wonder if we can relax the driver so that it only masks pins which are
> > > not configured to generate interrupts by the BIOS. I quickly tried
> > > following on one Braswell machine and it did not generate spurious
> > > interrupts.
> > >
> > > Can you check if this works for you?
> > 
> > I tried it, your patch is working. It gives the same result as not
> > clearing the north community. I receive the ACPI events.
> 
> OK, thanks for testing.
> 
> I'll make a formal patch and submit it with you CC'd. Let's hope it will
> not break anything :)

Hi, we've also found this issue on HP X360, but both patches don't work
with on it.

My current workaround is to save INTMASK before clearing then restore
it after, but I'm not sure if there's any side-effect by doing so.