clk: add clock-indices support
Add a property called clock-indices to allow clock-output-names
to be used where the index used to lookup a clock is not a 1:1
mapping to the array position in the clock-output-names
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index ea2ca9f..a6f079d 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2496,8 +2496,12 @@
const char *of_clk_get_parent_name(struct device_node *np, int index)
{
struct of_phandle_args clkspec;
+ struct property *prop;
const char *clk_name;
+ const __be32 *vp;
+ u32 pv;
int rc;
+ int count;
if (index < 0)
return NULL;
@@ -2507,8 +2511,22 @@
if (rc)
return NULL;
+ index = clkspec.args_count ? clkspec.args[0] : 0;
+ count = 0;
+
+ /* if there is an indices property, use it to transfer the index
+ * specified into an array offset for the clock-output-names property.
+ */
+ of_property_for_each_u32(clkspec.np, "clock-indices", prop, vp, pv) {
+ if (index == pv) {
+ index = count;
+ break;
+ }
+ count++;
+ }
+
if (of_property_read_string_index(clkspec.np, "clock-output-names",
- clkspec.args_count ? clkspec.args[0] : 0,
+ index,
&clk_name) < 0)
clk_name = clkspec.np->name;