Mastering Linux Device Driver Development

Chapter 10: Linux Kernel Power Management

Mobile devices are becoming increasingly complex with more and more features in order to follow commercial trends and satisfy consumers. While a few parts of such devices run proprietary or bare metal software, most of them run Linux-based operating systems (embedded Linux distributions, Android, to name but a few), and all of them are battery powered. In addition to full functionality and performance, consumers require the longest possible autonomy and long-lasting batteries. It goes without saying that full performance and autonomy (power saving) are two totally incompatible concepts, and that a compromise must be found at all times when using the device. This compromise comes with Power Management, ...