[$] Active state management of power domains

The Linux kernel's generic power domain (genpd) subsystem has beenextended to support active state management of the power domains in the 4.15 development cycle. Power domains weretraditionally used to enable or disable power to a region of a system onchip (SoC) but, with the recent updates, they can control the clock rate oramount of power supplied to that region as well.These changes improve the kernel's ability to run the system's hardware atthe optimal power level for the current workload.<p>Click below (subscribers only) for the full article contributed by VireshKumar.