include/linux/clk.h

24  * PRE_RATE_CHANGE - called immediately before the clk rate is changed,
25  *     to indicate that the rate change will proceed.  Drivers must
27  *     rate change.  Callbacks may either return NOTIFY_DONE, NOTIFY_OK,
30  * ABORT_RATE_CHANGE: called if the rate change failed for some reason
35  * POST_RATE_CHANGE - called after the clk rate change has successfully
61  * struct clk_notifier_data - rate data to pass to the notifier callback
63  * @old_rate: previous rate of this clk
64  * @new_rate: new rate of this clk
66  * For a pre-notifier, old_rate is the clk's rate before this rate
67  * change, and new_rate is what the rate will be in the future.  For a
69  * current rate (this was done to optimize the implementation).
95  * clk_notifier_register - register a clock rate-change notifier callback
96  * @clk: clock whose rate we are interested in
106  * clk_notifier_unregister - unregister a clock rate-change notifier callback
107  * @clk: clock whose rate we are no longer interested in
113  * devm_clk_notifier_register - register a managed rate-change notifier callback
115  * @clk: clock whose rate we are interested in
187  * clk_rate_exclusive_get - get exclusivity over the rate control of a
191  * This function allows drivers to get exclusive control over the rate of a
193  * opereation which could alter the rate of the provider or cause glitches
196  * the rate effectively gets locked as exclusivity can't be preempted.
217  * clk_rate_exclusive_put - release exclusivity over the rate control of a
719  * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
782  * clk_round_rate - adjust a rate to the exact rate a clock can provide
784  * @rate: desired clock rate in Hz
786  * This answers the question "if I were to pass @rate to clk_set_rate(),
787  * what clock rate would I end up with?" without changing the hardware
790  *   rate = clk_round_rate(clk, r);
795  *   rate = clk_get_rate(clk);
800  * Returns rounded clock rate in Hz, or negative errno.
802 long clk_round_rate(struct clk *clk, unsigned long rate);
805  * clk_set_rate - set the clock rate for a clock source
807  * @rate: desired clock rate in Hz
809  * Updating the rate starts at the top-most affected clock and then
814 int clk_set_rate(struct clk *clk, unsigned long rate);
817  * clk_set_rate_exclusive- set the clock rate and claim exclusivity over
820  * @rate: desired clock rate in Hz
822  * This helper function allows drivers to atomically set the rate of a producer
823  * and claim exclusivity over the rate control of the producer.
831 int clk_set_rate_exclusive(struct clk *clk, unsigned long rate);
846  * clk_set_rate_range - set a rate range for a clock source
848  * @min: desired minimum clock rate in Hz, inclusive
849  * @max: desired maximum clock rate in Hz, inclusive
856  * clk_set_min_rate - set a minimum clock rate for a clock source
858  * @rate: desired minimum clock rate in Hz, inclusive
862 int clk_set_min_rate(struct clk *clk, unsigned long rate);
865  * clk_set_max_rate - set a maximum clock rate for a clock source
867  * @rate: desired maximum clock rate in Hz, inclusive
871 int clk_set_max_rate(struct clk *clk, unsigned long rate);
1046 static inline int clk_set_rate(struct clk *clk, unsigned long rate)
1051 static inline int clk_set_rate_exclusive(struct clk *clk, unsigned long rate)
1056 static inline long clk_round_rate(struct clk *clk, unsigned long rate)
1072 static inline int clk_set_min_rate(struct clk *clk, unsigned long rate)
1077 static inline int clk_set_max_rate(struct clk *clk, unsigned long rate)