The patch adds function for parsing Device Tree to get
clock specifier. The function could be ultimately used
by clock core.
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
---
drivers/clk/clkdev.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index da4bda8..bd22750 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -120,6 +120,29 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
return clk;
}
EXPORT_SYMBOL(of_clk_get_by_name);
+
+static int of_get_clock_spec(struct device *dev, const char *name,
+ struct of_phandle_args *spec)
+{
+ struct device_node *np = dev->of_node;
+
+ while (np) {
+ int idx = 0;
+
+ if (name)
+ idx = of_property_match_string(np, "clock-names", name);
+
+ if (!of_parse_phandle_with_args(np, "clocks", "#clock-cells",
+ idx, spec))
+ return 0;
+
+ np = np->parent;
+ if (np && !of_get_property(np, "clock-ranges", NULL))
+ break;
+ }
+
+ return -ENOENT;
+}
#endif
/*
--
1.9.1
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