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Commit 653d1452 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Stephen Boyd
Browse files

clk: optimize the divider walk in clk_divider_bestdiv() 



Because _next_div() returns a valid divider, there is no need to
consult _is_valid_div() for the validity of the divider in every
iteration.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent 090341b0

drivers/clk/clk-divider.c

+2 −3
Original line number Diff line number Diff line
@@ -303,9 +303,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate, 
	 */

	maxdiv = min(ULONG_MAX / rate, maxdiv);



	for (i = 1; i <= maxdiv; i = _next_div(table, i, flags)) {

		if (!_is_valid_div(table, i, flags))

			continue;

	for (i = _next_div(table, 0, flags); i <= maxdiv;

					     i = _next_div(table, i, flags)) {

		if (rate * i == parent_rate_saved) {

			/*

			 * It's the most ideal case if the requested rate can be