From: Mike Turquette <mturquette@linaro.org>
Date: Tue, 8 Oct 2013 06:12:13 +0000 (-0700)
Subject: clk: of: helper for determining number of parent clocks
X-Git-Tag: firefly_0821_release~6398
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e47ed5fb5fbaeb599d2375c716fd2d7e2d56fc8f;p=firefly-linux-kernel-4.4.55.git

clk: of: helper for determining number of parent clocks

Walks the "clocks" array of parent clock phandles and returns the
number.

Signed-off-by: Mike Turquette <mturquette@linaro.org>
---

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 32e2fed6d143..2cf2ea6b77a1 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2202,6 +2202,12 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec)
 	return clk;
 }
 
+int of_clk_get_parent_count(struct device_node *np)
+{
+	return of_count_phandle_with_args(np, "clocks", "#clock-cells");
+}
+EXPORT_SYMBOL_GPL(of_clk_get_parent_count);
+
 const char *of_clk_get_parent_name(struct device_node *np, int index)
 {
 	struct of_phandle_args clkspec;
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 6f3401f3f6c5..ccd69da597c0 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -461,6 +461,7 @@ struct clk_onecell_data {
 	unsigned int clk_num;
 };
 struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
+int of_clk_get_parent_count(struct device_node *np);
 const char *of_clk_get_parent_name(struct device_node *np, int index);
 
 void of_clk_init(const struct of_device_id *matches);