1f26c8a8eSSimon Glassconfig CLK 2f26c8a8eSSimon Glass bool "Enable clock driver support" 3f26c8a8eSSimon Glass depends on DM 4f26c8a8eSSimon Glass help 5f26c8a8eSSimon Glass This allows drivers to be provided for clock generators, including 6f26c8a8eSSimon Glass oscillators and PLLs. Devices can use a common clock API to request 7f26c8a8eSSimon Glass a particular clock rate and check on available clocks. Clocks can 8f26c8a8eSSimon Glass feed into other clocks in a tree structure, with multiplexers to 9f26c8a8eSSimon Glass choose the source for each clock. 10f26c8a8eSSimon Glass 11*05435891SMasahiro Yamadaconfig SPL_CLK 12f26c8a8eSSimon Glass bool "Enable clock support in SPL" 13f26c8a8eSSimon Glass depends on CLK 14f26c8a8eSSimon Glass help 15f26c8a8eSSimon Glass The clock subsystem adds a small amount of overhead to the image. 16f26c8a8eSSimon Glass If this is acceptable and you have a need to use clock drivers in 17f26c8a8eSSimon Glass SPL, enable this option. It might provide a cleaner interface to 18f26c8a8eSSimon Glass setting up clocks within SPL, and allows the same drivers to be 19f26c8a8eSSimon Glass used as U-Boot proper. 20