On 04-10-21, 14:44, Geert Uytterhoeven wrote:
Currently the GPIO Aggregator does not support interrupts. This means that kernel drivers going from a GPIO to an IRQ using gpiod_to_irq(), and userspace applications using line events do not work.
Add interrupt support by providing a gpio_chip.to_irq() callback, which just calls into the parent GPIO controller.
Note that this does not implement full interrupt controller (irq_chip) support, so using e.g. gpio-keys with "interrupts" instead of "gpios" still does not work.
Hi Geert,
Thanks for looking into this. I am not sure of the difference it makes with and without full irq-chip, but lemme explain the use case that we are concerned about with virtio.
Eventually the interrupt should be visible to userspace, with something like libgpiod. Which can then send the information over virtio to the guest.
Will the interrupts be visible in userspace with your patch ?