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clk: Unprepare the unused prepared slow clocks at late init
The unused ungated fast clocks are already being disabled from
clk_disable_unused at late init. This patch extend this sequence
to the slow unused prepared clocks to be unprepared.
Unless the optional .is_prepared callback is implemented by a
clk_hw the clk_disable_unused sequence will not unprepare any
unused clocks, since it will fall back to use the software
prepare counter.
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>
[mturquette@linaro.org: fixed hlist accessors per b67bfe0d
]
This commit is contained in:
parent
3d6ee287a3
commit
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@ -335,6 +335,28 @@ late_initcall(clk_debug_init);
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static inline int clk_debug_register(struct clk *clk) { return 0; }
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#endif
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/* caller must hold prepare_lock */
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static void clk_unprepare_unused_subtree(struct clk *clk)
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{
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struct clk *child;
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if (!clk)
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return;
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hlist_for_each_entry(child, &clk->children, child_node)
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clk_unprepare_unused_subtree(child);
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if (clk->prepare_count)
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return;
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if (clk->flags & CLK_IGNORE_UNUSED)
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return;
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if (__clk_is_prepared(clk))
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if (clk->ops->unprepare)
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clk->ops->unprepare(clk->hw);
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}
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/* caller must hold prepare_lock */
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static void clk_disable_unused_subtree(struct clk *clk)
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{
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@ -386,6 +408,12 @@ static int clk_disable_unused(void)
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hlist_for_each_entry(clk, &clk_orphan_list, child_node)
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clk_disable_unused_subtree(clk);
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hlist_for_each_entry(clk, &clk_root_list, child_node)
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clk_unprepare_unused_subtree(clk);
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hlist_for_each_entry(clk, &clk_orphan_list, child_node)
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clk_unprepare_unused_subtree(clk);
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mutex_unlock(&prepare_lock);
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return 0;
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