This chapter described the whole input framework, and highlighted the difference between polled and interrupt-driven input devices. Having reached the end of this chapter, you have gained the knowledge necessary to write a driver for any input driver, whatever its type, and whatever input event it supports. The user space interface was discussed too, and a sample was provided. The next chapter discusses another important framework, the RTC, which is a key element of time management in PCs as well as embedded devices.