Dear DT and bindings maintainers! I'm facing a dilemma trying to provide new bindings for an interrupt controller which only has one interrupt in one configuration. It must be modelled in the DT because its driver has to acknowledge the IRQ request in HW, but otherwise there is no information required to select or configure this single interrupt. Logically thinking the above would mean #interrupt-cells = <0> in this interrupt-controller node. And except all the hell breaks loose in the drivers/of/irq.c I see no other issues with this. Do you see this as definitely illegal combination? (Aside of the two already existing examples in both arch/.../*.dts and in bindings, one marked as "will not be an irq parent" and another example being an MSI controller, probably taking other code paths. -- Alexander Sverdlin Siemens AG www.siemens.com
