clk: add devm variant of clk_notifier_register

Add a memory managed variant of clk_notifier_register() to make life easier
on clock consumers using notifiers

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20201021163847.595189-2-jbrunet@baylibre.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/clk.h b/include/linux/clk.h
index 7fd6a1febcf4..f53afdf8198b 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -110,6 +110,16 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb);
 int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
 
 /**
+ * devm_clk_notifier_register - register a managed rate-change notifier callback
+ * @dev: device for clock "consumer"
+ * @clk: clock whose rate we are interested in
+ * @nb: notifier block with callback function pointer
+ *
+ * Returns 0 on success, -EERROR otherwise
+ */
+int devm_clk_notifier_register(struct device *dev, struct clk *clk, struct notifier_block *nb);
+
+/**
  * clk_get_accuracy - obtain the clock accuracy in ppb (parts per billion)
  *		      for a clock source.
  * @clk: clock source