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That's not > unknown for SPI controllers. If the interrupt is actually a strong > requirement for the hardware (and especially if it is actually wired up > on this system) then we should drop these patches. Keep in mind one thing. This is soft IP in fpga. If you connect in design IRQ you will have it. If you don't connect it, you don't have it. From HW perspective both of them are valid options. It is up to everybody to decide if make sense to have IRQ logic or not. This is the same for all soft IP cores which Xilinx is having. From SW perspective one OS can decide to use IRQ, another one not. Then the question is if DT binding in Linux are targeting HW capability and configurations or describing Linux driver. I was said multiple times that it should describe HW not actually what Linux driver implements. Thanks, Michal