On Fri, 4 Aug 2023 at 11:02, Swedha R <swedha...@gmail.com> wrote: > > Hi , > Is qemu will support virtual GPIO drivers. How to work on GPIO in qemu?
Broadly speaking, you seem to be trying to do something that QEMU is not set up to do. QEMU's support for GPIO controllers and GPIO lines is almost entirely there so we can emulate features of boards and SoCs which are implemented via internal GPIO controllers and GPIO lines. (For example, a board might wire up the SD card "card present" line to a GPIO controller: so to make the SD card work, QEMU needs to model that GPIO controller and that line.) QEMU does not have a framework for the equivalent of a board like a raspberry pi where GPIO lines are exposed directly to pins that the end-user can wire up to other boards, to sensors, to LEDs, or to push buttons. So if you are trying to model that sort of thing, or to generally take an existing QEMU model and "use the GPIO controller outputs", you are trying to push uphill, because the facilities are basically not there to help you. -- PMM
