clk: add DT fixed-clock binding support

Add support for DT "fixed-clock" binding to the common fixed rate clock
support.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
[Rob Herring] Rework and move into common clock infrastructure
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Grant Likely 2012-04-07 21:39:39 -05:00 committed by Mike Turquette
parent 766e6a4ec6
commit 015ba40246
2 changed files with 25 additions and 0 deletions

View File

@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/of.h>
/*
* DOC: basic fixed-rate clock that cannot gate
@ -79,3 +80,25 @@ struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
return clk;
}
#ifdef CONFIG_OF
/**
* of_fixed_clk_setup() - Setup function for simple fixed rate clock
*/
void __init of_fixed_clk_setup(struct device_node *node)
{
struct clk *clk;
const char *clk_name = node->name;
u32 rate;
if (of_property_read_u32(node, "clock-frequency", &rate))
return;
of_property_read_string(node, "clock-output-names", &clk_name);
clk = clk_register_fixed_rate(NULL, clk_name, NULL, CLK_IS_ROOT, rate);
if (clk)
of_clk_add_provider(node, of_clk_src_simple_get, clk);
}
EXPORT_SYMBOL_GPL(of_fixed_clk_setup);
#endif

View File

@ -172,6 +172,8 @@ struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
unsigned long fixed_rate);
void of_fixed_clk_setup(struct device_node *np);
/**
* struct clk_gate - gating clock
*