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clk: add common of_clk_init() function

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Modify of_clk_init function so that it will determine which
driver to initialize based on device tree instead of each driver
registering to it.

Based on a similar patch for drivers/irqchip by Thomas Petazzoni and
drivers/clocksource by Stephen Warren.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Tested-by: Tony Prisk <linux@prisktech.co.nz>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Rob Herring <rob.herring@calxeda.com>
Tested-by: Josh Cartwright <josh.cartwright@ni.com>
Reviewed-by: Josh Cartwright <josh.cartwright@ni.com>
Acked-by: Maxime Ripard <maxime.ripard@anandra.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: merge conflict from missing CLKSRC_OF_TABLES()]

Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Prashant Gaikwad
2013-01-04 12:30:52 +05:30
committed by Mike Turquette
parent 4cfe54e579
commit f2f6c2556d
4 changed files with 26 additions and 0 deletions
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9
drivers/clk/clk.c
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@@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/device.h>
#include <linux/init.h>
static DEFINE_SPINLOCK(enable_lock);
static DEFINE_MUTEX(prepare_lock);
@@ -1803,6 +1804,11 @@ struct of_clk_provider {
void *data;
};
extern struct of_device_id __clk_of_table[];
static const struct of_device_id __clk_of_table_sentinel
__used __section(__clk_of_table_end);
static LIST_HEAD(of_clk_providers);
static DEFINE_MUTEX(of_clk_lock);
@@ -1931,6 +1937,9 @@ void __init of_clk_init(const struct of_device_id *matches)
{
struct device_node *np;
if (!matches)
matches = __clk_of_table;
for_each_matching_node(np, matches) {
const struct of_device_id *match = of_match_node(matches, np);
of_clk_init_cb_t clk_init_cb = match->data;