mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
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>
This commit is contained in:
parent
29d43ddf73
commit
7a0fc1a3df
@ -44,6 +44,23 @@ For example:
|
||||
clocks by index. The names should reflect the clock output signal
|
||||
names for the device.
|
||||
|
||||
clock-indices: If the identifyng number for the clocks in the node
|
||||
is not linear from zero, then the this mapping allows
|
||||
the mapping of identifiers into the clock-output-names
|
||||
array.
|
||||
|
||||
For example, if we have two clocks <&oscillator 1> and <&oscillator 3>:
|
||||
|
||||
oscillator {
|
||||
compatible = "myclocktype";
|
||||
#clock-cells = <1>;
|
||||
clock-indices = <1>, <3>;
|
||||
clock-output-names = "clka", "clkb";
|
||||
}
|
||||
|
||||
This ensures we do not have any empty nodes in clock-output-names
|
||||
|
||||
|
||||
==Clock consumers==
|
||||
|
||||
Required properties:
|
||||
|
@ -2496,8 +2496,12 @@ 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;
|
||||
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 @@ const char *of_clk_get_parent_name(struct device_node *np, int index)
|
||||
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;
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user