[PATCH v6 4/6] MIPS: AR7: Add clk_get_optional() function

[Phil Edworthy]

clk_get_optional() returns NULL if not found instead of -ENOENT,
otherwise the behaviour is the same as clk_get().

Signed-off-by: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
---
 arch/mips/ar7/clock.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c
index 6b64fd96dba8..b13f763948b1 100644
--- a/arch/mips/ar7/clock.c
+++ b/arch/mips/ar7/clock.c
@@ -454,6 +454,17 @@ struct clk *clk_get(struct device *dev, const char *id)
 }
 EXPORT_SYMBOL(clk_get);
 
+struct clk *clk_get_optional(struct device *dev, const char *id)
+{
+	struct clk *clk = clk_get(dev, id);
+
+	if (clk == ERR_PTR(-ENOENT))
+		clk = NULL;
+
+	return clk;
+}
+EXPORT_SYMBOL(clk_get_optional);
+
 void clk_put(struct clk *clk)
 {
 }
-- 
2.17.1