Re: [PATCH 16/23] gpio: nomadik: support shared GPIO IRQs

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Wed, Feb 14, 2024 at 5:24 PM Théo Lebrun <theo.lebrun@xxxxxxxxxxx> wrote:
>
> Support a single IRQs used by multiple GPIO banks. Change the IRQ
> handler type from a chained handler (as used by gpiolib
> for ->parent_handler) to a threaded IRQ.
>
> Use a fake raw spinlock to ensure generic_handle_irq() is called in a
> no-irq context. See Documentation/driver-api/gpio/driver.rst, "CHAINED
> CASCADED GPIO IRQCHIPS" for additional information.
>

Any reason for not using preempt_disable()?

Bart

[snip]