linux-kernel - Re: [PATCH-next 01/20] gpio: gpio-omap: ensure irq is enabled before wakeup

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Date:   Wed, 12 Jun 2019 09:54:50 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Russell King <rmk@....linux.org.uk>,
        Tony Lindgren <tony@...mide.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>
Subject: Re: [PATCH-next 01/20] gpio: gpio-omap: ensure irq is enabled before wakeup

On Mon, Jun 10, 2019 at 7:11 PM Grygorii Strashko
<grygorii.strashko@...com> wrote:

> From: Russell King <rmk+kernel@...linux.org.uk>
>
> Documentation states:
>
>   NOTE: There must be a correlation between the wake-up enable and
>   interrupt-enable registers. If a GPIO pin has a wake-up configured
>   on it, it must also have the corresponding interrupt enabled (on
>   one of the two interrupt lines).
>
> Ensure that this condition is always satisfied by enabling the detection
> events after enabling the interrupt, and disabling the detection before
> disabling the interrupt.  This ensures interrupt/wakeup events can not
> happen until both the wakeup and interrupt enables correlate.
>
> If we do any clearing, clear between the interrupt enable/disable and
> trigger setting.
>
> Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>

Patch applied.

Yours,
Linus Walleij