dm: clk: lookup callbak into CCU-like clock devices

2 files changed, 19 insertions, 0 deletions

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index a6a65b2a66..fe52ee8e69 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -133,6 +133,13 @@ int clk_get_by_output_name(const char *output_name, struct clk *clk)
 					    dev_of_offset(dev),
 					    "clock-output-names",
 					    output_name);
+
+		if (idx < 0 && clk_dev_ops(dev)->lookup) {
+			clk->dev = dev;
+			if (clk_dev_ops(dev)->lookup(clk, output_name) == 0)
+				return clk->id;
+		}
+
 		if (idx < 0)
 			continue;
 
diff --git a/include/clk-uclass.h b/include/clk-uclass.h
index 07c1065495..b764d77529 100644
--- a/include/clk-uclass.h
+++ b/include/clk-uclass.h
@@ -90,6 +90,18 @@ struct clk_ops {
 	 * @return zero on success, or -ve error code.
 	 */
 	int (*disable)(struct clk *clk);
+	/**
+	 * lookup - Find a clock from a human-readable name.
+	 *
+	 * The clock core calls this function as a fallback in implementing
+	 * a client's clk_get_by_output_name() call, if an 'output-names'
+	 * property is not present.
+	 *
+	 * @clock:	The clock struct to hold the translation result.
+	 * @name:	The clock specifier values from device tree.
+	 * @return zero on success, or a negative error code.
+	 */
+	int (*lookup)(struct clk *clock, const char *name);
 };
 
 #endif