On Mon, 20 Jun 2022 at 14:22, Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk> wrote: > > On 20/06/2022 11:17, Peter Maydell wrote: > > Well, I think that "unnamed GPIO out" lines should be for > > actual GPIO lines, ie on a GPIO controller or similar. > > If you want an outbound IRQ line and don't want to name it, > > that's what sysbus IRQ lines do. Otherwise, name the GPIO line. > > That's interesting - I've always been under the impression that this was the > other > way around, i.e. for a TYPE_DEVICE then unnamed gpios are equivalent to IRQs, > and > that gpio lines for any other non-IRQ purpose should be named :/
Well, named GPIO lines are relatively new, so if you look at older devices you'll probably find plenty that use unnamed GPIO lines for various things including IRQ lines. But I think that for clarity if you create something called "gpio_out" the obvious thing is that that's a GPIO output, and if you create something called "sysbus_irq" the obvious thing is that that's an IRQ line, and if you want to do something that's neither of those then the clearest thing is to name the GPIO. -- PMM
