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H A Dclk.hdiff d2d14a77886485310ec66e575f00ea5232ac7a14 Sat Mar 14 10:12:35 CDT 2015 Russell King <rmk+kernel@arm.linux.org.uk> clk: update clk API documentation to clarify clk_round_rate()

The idea is that rate = clk_round_rate(clk, r) is equivalent to:

clk_set_rate(clk, r);
rate = clk_get_rate(clk);

except that clk_round_rate() does not change the hardware in any way.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>