linux-kernel - Re: [PATCH] pinctrl: rockchip: add irq_enable & irq

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Message-ID: <CACRpkdYQawufFw+TX8MX0qbAXOy9rJ=uT5qCG8kmfOON2k7yMw@mail.gmail.com>
Date:   Tue, 14 Mar 2017 16:03:48 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Jeffy Chen <jeffy.chen@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Tomasz Figa <tfiga@...gle.com>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] pinctrl: rockchip: add irq_enable & irq_disable ops

On Thu, Mar 2, 2017 at 6:56 AM, Jeffy Chen <jeffy.chen@...k-chips.com> wrote:

> Currently we are trying to enable/disable the clk of irq's gpio bank when
> unmask/mask irq. But the kernel's "lazy disable approach" will skip masking
> irq when the irq chip doesn't support irq_disable ops.
>
> So we may hit this case:
>         irq_enable-> enable clk
>         irq_disable-> noop
>         irq_enable-> enable clk again
>         irq_disable-> noop
>
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>

Heiko, can you look at this patch?

Yours,
Linus Walleij