clk: clk-uclass: add clk_get_by_output_name

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 6fcfd6997c..a6a65b2a66 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -10,6 +10,7 @@
 #include <clk.h>
 #include <clk-uclass.h>
 #include <dm.h>
+#include <dm/uclass-internal.h>
 #include <dt-structs.h>
 #include <errno.h>
 
@@ -113,6 +114,35 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
 
 	return clk_get_by_index(dev, index, clk);
 }
+
+int clk_get_by_output_name(const char *output_name, struct clk *clk)
+{
+	struct udevice *dev;
+	int idx;
+	int ret;
+
+	debug("%s(output=%s, clk==%p)\n", __func__, output_name, clk);
+
+	/* Try to find the clock among the already registered devices */
+	for (ret = uclass_find_first_device(UCLASS_CLK, &dev); dev;
+	     ret = uclass_find_next_device(&dev)) {
+		if (ret)
+			continue;
+
+		idx = fdt_stringlist_search(gd->fdt_blob,
+					    dev_of_offset(dev),
+					    "clock-output-names",
+					    output_name);
+		if (idx < 0)
+			continue;
+
+		clk->dev = dev;
+		clk->id = idx;
+		return idx;
+	}
+
+	return -ENOENT;
+}
 #endif /* OF_CONTROL */
 
 int clk_request(struct udevice *dev, struct clk *clk)