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clk: Introduce optional unprepare_unused callback

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An unprepare_unused callback is introduced due to the same reasons to
why the disable_unused callback was added.

During the clk_disable_unused sequence, those clk_hw that needs specific
treatment with regards to being unprepared, shall implement the
unprepare_unused callback.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Ulf Hansson
2013-03-12 20:26:04 +01:00
committed by Mike Turquette
parent 1c155b3dfe
commit 3cc8247f1d
2 changed files with 10 additions and 2 deletions
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7
drivers/clk/clk.c
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@@ -352,9 +352,12 @@ static void clk_unprepare_unused_subtree(struct clk *clk)
if (clk->flags & CLK_IGNORE_UNUSED)
return;
if (__clk_is_prepared(clk))
if (clk->ops->unprepare)
if (__clk_is_prepared(clk)) {
if (clk->ops->unprepare_unused)
clk->ops->unprepare_unused(clk->hw);
else if (clk->ops->unprepare)
clk->ops->unprepare(clk->hw);
}
}
/* caller must hold prepare_lock */