Hi Krzysztof, >>>>>>> + interrupts-extended: >>>>>> >>>>>> interrupts instead. >>>>>> >>>>>> Anyway, you must describe the items. Why this is not fixed but flexible? >>>>>> Hardware has different number of pins? That's unlikely. >>>>>> >>>>> I will replace it with 'interrupts'. Since our Interrupt controller >>>>> architecture doesn't involve multiple interrupt sources, using 'interrupts' >>> should suffice. >>>>> >>>> >>>> Due to changes in hardware design, some peripheral interrupts pin >>>> initially >>> connected to the Realtek interrupt controller were redirected to the GIC. >>>> However, the associated fields and statuses in the Realtek interrupt >>>> controller >>> registers were not removed. >>>> As a result, these interrupts cannot be cleared by peripheral >>>> register, and their >>> status clearing is still needing the Realtek interrupt controller driver to >manage. >>>> >>>> That's why flexibility is necessary. >>> >>> This does not explain why this is not fixed per variant. >>> >> >> Does the definition of "fixed" you mentioned refer to fixed interrupt pins? If >> not, could you please give me an example and let me know what you mean by >> "fixed"? > >Number of the interrupts per each device or variant should be strictly defined, >not variable. Thank you for your explanation. The DHC platforms contain two interrupt controllers, each handling peripheral device interrupts in the two power domains. While each has a fixed IRQ numbers, the specific IRQ varies depending on the platform. >Please wrap your emails according to mail netiquette. I apologize for my rude way of asking the question. I will improve my expression. Thank for your feedback. Regards, James