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authorShawn Guo <shawn.guo@linaro.org>2012-08-22 21:36:27 +0800
committerMike Turquette <mturquette@linaro.org>2012-09-07 18:30:19 -0700
commit494bfec99922d54054d2d0873f1017680cfc3f13 (patch)
tree45697d25099ec0a8790ab77451254d29b2b6ce21 /drivers
parent09b9b2b204751fc23d245d57d420f4973db22a67 (diff)
downloadlinux-494bfec99922d54054d2d0873f1017680cfc3f13.tar.gz
clk: add of_clk_src_onecell_get() support
For those SoCs that have hundreds of clock outputs, their clock DT bindings could reasonably define #clock-cells as 1 and require the client device specify the index of the clock it consumes in the cell of its "clocks" phandle. Add a generic of_clk_src_onecell_get() function for this purpose. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clk/clk.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index d9cbae06549..56e4495ebeb 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1587,6 +1587,20 @@ struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
}
EXPORT_SYMBOL_GPL(of_clk_src_simple_get);
+struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct clk_onecell_data *clk_data = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx >= clk_data->clk_num) {
+ pr_err("%s: invalid clock index %d\n", __func__, idx);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return clk_data->clks[idx];
+}
+EXPORT_SYMBOL_GPL(of_clk_src_onecell_get);
+
/**
* of_clk_add_provider() - Register a clock provider for a node
* @np: Device node pointer associated with clock provider