Summary

Now, IRQ multiplexing contains no more secrets for you. We discussed the most important elements of IRQ management under Linux systems, the IRQ domain API. You have learned the basics to develop interrupt controller drivers, as well as managing their binding from within the DT. IRQ propagation has been discussed in order to understand what happens from the request to the handling. This chapter will help you to understand the interrupt-driven part of the next chapter, which deals with input device drivers.