Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
---
drivers/clk/clk-uclass.c | 30 ++++++++++++++++++++++++++++++
include/clk.h | 22 ++++++++++++++++++++++
2 files changed, 52 insertions(+)
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 6fcfd69..a6a65b2 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)
diff --git a/include/clk.h b/include/clk.h
index 5a5c2ff..d12b896 100644
--- a/include/clk.h
+++ b/include/clk.h
@@ -98,6 +98,22 @@ int clk_get_by_index(struct udevice *dev, int index, struct
clk *clk);
* @return 0 if OK, or a negative error code.
*/
int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk);
+
+/**
+ * clk_get_by_output_name - Get a clock by its output name
+ *
+ * This looks up a clock from the bound clock-devices. The output_name
+ * is a string that should be present in the 'clock-output-names' list
+ * of one of those clocks.
+ *
+ * @output_name: A name contained in the output-name list of the node
+ * associated with the target node.
+ * @clk: A pointer to a clock structure to initialize.
+ * @return the index (of the name in the output-name list) if found, or
+ * a negative error code.
+ */
+
+int clk_get_by_output_name(const char *output_name, struct clk *clk);
#else
static inline int clk_get_by_index(struct udevice *dev, int index,
struct clk *clk)
@@ -110,6 +126,12 @@ static inline int clk_get_by_name(struct udevice *dev,
const char *name,
{
return -ENOSYS;
}
+
+static inline int clk_get_by_output_name(const char *output_name,
+ struct clk *clk)
+{
+ return -ENOSYS;
+}
#endif
/**
--
1.9.1
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