diff options
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 7571b5054f3..c0141f3e110 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -336,6 +336,28 @@ static inline int clk_debug_register(struct clk *clk) { return 0; } #endif /* caller must hold prepare_lock */ +static void clk_unprepare_unused_subtree(struct clk *clk) +{ + struct clk *child; + + if (!clk) + return; + + hlist_for_each_entry(child, &clk->children, child_node) + clk_unprepare_unused_subtree(child); + + if (clk->prepare_count) + return; + + if (clk->flags & CLK_IGNORE_UNUSED) + return; + + if (__clk_is_prepared(clk)) + if (clk->ops->unprepare) + clk->ops->unprepare(clk->hw); +} + +/* caller must hold prepare_lock */ static void clk_disable_unused_subtree(struct clk *clk) { struct clk *child; @@ -386,6 +408,12 @@ static int clk_disable_unused(void) hlist_for_each_entry(clk, &clk_orphan_list, child_node) clk_disable_unused_subtree(clk); + hlist_for_each_entry(clk, &clk_root_list, child_node) + clk_unprepare_unused_subtree(clk); + + hlist_for_each_entry(clk, &clk_orphan_list, child_node) + clk_unprepare_unused_subtree(clk); + mutex_unlock(&prepare_lock); return 0; |