1config CLK 2 bool "Enable clock driver support" 3 depends on DM 4 help 5 This allows drivers to be provided for clock generators, including 6 oscillators and PLLs. Devices can use a common clock API to request 7 a particular clock rate and check on available clocks. Clocks can 8 feed into other clocks in a tree structure, with multiplexers to 9 choose the source for each clock. 10 11config SPL_CLK_SUPPORT 12 bool "Enable clock support in SPL" 13 depends on CLK 14 help 15 The clock subsystem adds a small amount of overhead to the image. 16 If this is acceptable and you have a need to use clock drivers in 17 SPL, enable this option. It might provide a cleaner interface to 18 setting up clocks within SPL, and allows the same drivers to be 19 used as U-Boot proper. 20