Re: [PATCH v2 0/2] Add GPIO level-sensitive interrupt support

From: Marek Vasut
Date: Tue Feb 18 2020 - 11:27:24 EST

On 2/18/20 2:12 PM, Alexandre Torgue wrote:
> This series adds the possibility to handle gpio interrupts on level.
> GPIO hardware block is directly linked to EXTI block but EXTI handles
> external interrupts only on edge. To be able to handle GPIO interrupt on
> level a "hack" is done in gpio irq chip: parent interrupt (exti irq chip)
> is retriggered following interrupt type and gpio line value.
> In exti irq chip, retrigger ops function is added.

btw. this might be unrelated, but is it possible to have e.g. gpioC2 set
as trigger-level-low and gpioD2 set as trigger-edge-falling ? It seems
8eb2dfee9fb1 ("pinctrl: stm32: add lock mechanism for irqmux selection")
prevents that.