clk: Add a devm variant of clk_rate_exclusive_get()

This allows to simplify drivers that use clk_rate_exclusive_get()
in their probe routine as calling clk_rate_exclusive_put() is cared for
automatically.

Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Russell King (Oracle) <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/clk.h b/include/linux/clk.h
index 06f1b292f8a0..24c49b01c25d 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -202,6 +202,18 @@ bool clk_is_match(const struct clk *p, const struct clk *q);
 int clk_rate_exclusive_get(struct clk *clk);
 
 /**
+ * devm_clk_rate_exclusive_get - devm variant of clk_rate_exclusive_get
+ * @dev: device the exclusivity is bound to
+ * @clk: clock source
+ *
+ * Calls clk_rate_exclusive_get() on @clk and registers a devm cleanup handler
+ * on @dev to call clk_rate_exclusive_put().
+ *
+ * Must not be called from within atomic context.
+ */
+int devm_clk_rate_exclusive_get(struct device *dev, struct clk *clk);
+
+/**
  * clk_rate_exclusive_put - release exclusivity over the rate control of a
  *                          producer
  * @clk: clock source