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| CLK_ROUND_RATE(9) | Clock Framework | CLK_ROUND_RATE(9) |
NAME¶
clk_round_rate - adjust a rate to the exact rate a clock can provide
SYNOPSIS¶
long clk_round_rate(struct clk * clk, unsigned long rate);
ARGUMENTS¶
struct clk * clk
clock source
unsigned long rate
desired clock rate in Hz
DESCRIPTION¶
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);
and:
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.
COPYRIGHT¶
| June 2017 | Kernel Hackers Manual 4.11 |