config PCH bool "Enable Platform-controller Hub (PCH) support" depends on X86 || SANDBOX help Most x86 chips include a PCH which is responsible for handling parts of the system not handled by that CPU. It supersedes the northbridge / southbridge architecture that was previously used. The PCH allows for higher performance since the memory functions are handled in the CPU. config X86_PCH7 bool "Add support for Intel PCH7" default y if X86 help Enable this if your SoC uses Platform Controller Hub 7 (PCH7). This dates from about 2011 and is used on baytrail, for example. The PCH provides access to the GPIO and SPI base addresses, among other functions. config X86_PCH9 bool "Add support for Intel PCH9" default y if X86 help Enable this if your SoC uses Platform Controller Hub 9 (PCH9). This dates from about 2015 and is used on baytrail, for example. The PCH provides access to the GPIO and SPI base addresses, among other functions.