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authorMichael Turquette <mturquette@linaro.org>2015-01-24 16:58:40 -0800
committerMichael Turquette <mturquette@linaro.org>2015-01-24 16:58:40 -0800
commit57386798f7db7f09d69f3b44fc66570e6db91bba (patch)
treec5e5134535a4019005a3b8d089ea54049f4cdc1d /include
parentec6415dc4160c3b312c0ac6143e5f587837bbd1f (diff)
parent4e88f3de89fbb7b5a5a0aca20376b276d26732ac (diff)
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Merge branch 'clk-has-parent' into clk-next
Diffstat (limited to 'include')
-rw-r--r--include/linux/clk.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/clk.h b/include/linux/clk.h
index c7f258a81761..ba7e9eda4347 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -302,6 +302,18 @@ long clk_round_rate(struct clk *clk, unsigned long rate);
int clk_set_rate(struct clk *clk, unsigned long rate);
/**
+ * clk_has_parent - check if a clock is a possible parent for another
+ * @clk: clock source
+ * @parent: parent clock source
+ *
+ * This function can be used in drivers that need to check that a clock can be
+ * the parent of another without actually changing the parent.
+ *
+ * Returns true if @parent is a possible parent for @clk, false otherwise.
+ */
+bool clk_has_parent(struct clk *clk, struct clk *parent);
+
+/**
* clk_set_parent - set the parent clock source for this clock
* @clk: clock source
* @parent: parent clock source
@@ -374,6 +386,11 @@ static inline long clk_round_rate(struct clk *clk, unsigned long rate)
return 0;
}
+static inline bool clk_has_parent(struct clk *clk, struct clk *parent)
+{
+ return true;
+}
+
static inline int clk_set_parent(struct clk *clk, struct clk *parent)
{
return 0;