The changes to the common clock framework for 4.0 are mostly new clock drivers and updates to existing ones for feature enhancements and bug fixes. There is more churn than usual in the framework core due to the change to introduce per-user unique struct clk pointers in 4.0. This caused several regressions to surface, some of which were sent as fixes to 4.0. New generic clock drivers were added for GPIO- and PWM-based clock controllers. Additionally the common clk-divider code recieved several fixes to the way it rounds rates.