clk_round_rate - adjust a rate to the exact rate a clock can provide
long clk_round_rate(struct clk * clk, unsigned long rate);
This answers the question “if I were to pass rate to clk_set_rate, what clock rate would I end up with?” without changing the hardware in any way. In other words:
rate = clk_round_rate(clk, r);
clk_set_rate(clk, r); rate = clk_get_rate(clk);
are equivalent except the former does not modify the clock hardware in any way.
Returns rounded clock rate in Hz, or negative errno.
|January 2017||Kernel Hackers Manual 4.8.|