Re: [PATCH v3 1/3] gpiolib: Make it possible to exclude GPIOs from IRQ domain

From: Linus Walleij
Date: Fri Sep 23 2016 - 08:47:18 EST

On Tue, Sep 20, 2016 at 2:15 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> 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 cannot generated normal
> interrupts at all.
> To support this we add a flag irq_need_valid_mask to struct gpio_chip. When
> this flag is set the core allocates irq_valid_mask that holds one bit for
> each GPIO the chip has. By default all bits are set but drivers can
> manipulate this using set_bit() and clear_bit() accordingly.
> Then when gpiochip_irqchip_add() is called, this mask is checked and all
> GPIOs with bit is set are added to the IRQ domain created for the GPIO
> chip.
> Suggested-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

Yeps, exactly like this!

Patch applied.

Linus Walleij