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[ARM] 5536/1: Move clk_add_alias() to arch/arm/common/clkdev.c

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This can be used for other arm platforms too as discussed
on the linux-arm-kernel list.

Also check the return value with IS_ERR and return PTR_ERR
as suggested by Russell King.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Tony Lindgren 2009-06-03 17:43:14 +01:00 committed by Russell King
parent 5926a295bb
commit c068303920
3 changed files with 31 additions and 17 deletions
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18
arch/arm/common/clkdev.c
View File

@ -135,6 +135,24 @@ struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id,
}
EXPORT_SYMBOL(clkdev_alloc);
int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
struct device *dev)
{
struct clk *r = clk_get(dev, id);
struct clk_lookup *l;
if (IS_ERR(r))
return PTR_ERR(r);
l = clkdev_alloc(r, alias, alias_dev_name);
clk_put(r);
if (!l)
return -ENODEV;
clkdev_add(l);
return 0;
}
EXPORT_SYMBOL(clk_add_alias);
/*
* clkdev_drop - remove a clock dynamically allocated
*/

17
arch/arm/mach-pxa/clock.c
View File

@ -86,20 +86,3 @@ void clks_register(struct clk_lookup *clks, size_t num)
for (i = 0; i < num; i++)
clkdev_add(&clks[i]);
}
int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
struct device *dev)
{
struct clk *r = clk_get(dev, id);
struct clk_lookup *l;
if (!r)
return -ENODEV;
l = clkdev_alloc(r, alias, alias_dev_name);
clk_put(r);
if (!l)
return -ENODEV;
clkdev_add(l);
return 0;
}

13
include/linux/clk.h
View File

@ -142,4 +142,17 @@ struct clk *clk_get_parent(struct clk *clk);
*/
struct clk *clk_get_sys(const char *dev_id, const char *con_id);
/**
* clk_add_alias - add a new clock alias
* @alias: name for clock alias
* @alias_dev_name: device name
* @id: platform specific clock name
* @dev: device
*
* Allows using generic clock names for drivers by adding a new alias.
* Assumes clkdev, see clkdev.h for more info.
*/
int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
struct device *dev);
#endif