linux-kernel - Re: [PATCH 1/2] gpiolib: Add possibility to mask which GPIOs are added to IRQ domain

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Date:   Sun, 18 Sep 2016 13:16:52 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Marc Zyngier <marc.zyngier@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Phidias Chiang <phidias.chiang@...onical.com>,
        Anisse Astier <anisse@...ier.eu>,
        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 1/2] gpiolib: Add possibility to mask which GPIOs are
 added to IRQ domain

On Thu, Sep 15, 2016 at 5:52 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:

> When using GPIO irqchip helpers to setup irqchip for a gpiolib based
> driver, it is not possible to select which GPIOs to add to the IRQ domain.
> Instead it just adds all GPIOs which is not always desired. For example
> there might be GPIOs that for some reason just cannot be used as interrupts
> at all.
>
> To make this possible we add valid_mask to each gpio_chip and by default
> assume all GPIOs can be used as interrupts. Drivers can then tune this
> using clear_bit() or similar before they call gpiochip_irqchip_add().
>
> Suggested-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>

Awesome, nice infrastructure.
Will apply once tglx and Marc's comments are fixed.

Yours,
Linus Walleij