Commit 05fd8e73 authored by Sascha Hauer's avatar Sascha Hauer
Browse files

clkdev: add possibility to get a clock based on the device name 



This adds clk_get_sys to get a clock without the associated struct
device.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 0412d6c9

arch/arm/common/clkdev.c

+9 −2
Original line number Diff line number Diff line
@@ -62,9 +62,8 @@ static struct clk *clk_find(const char *dev_id, const char *con_id) 
	return clk;

}



struct clk *clk_get(struct device *dev, const char *con_id)

struct clk *clk_get_sys(const char *dev_id, const char *con_id)

{

	const char *dev_id = dev ? dev_name(dev) : NULL;

	struct clk *clk;



	mutex_lock(&clocks_mutex);
@@ -75,6 +74,14 @@ struct clk *clk_get(struct device *dev, const char *con_id) 


	return clk ? clk : ERR_PTR(-ENOENT);

}

EXPORT_SYMBOL(clk_get_sys);



struct clk *clk_get(struct device *dev, const char *con_id)

{

	const char *dev_id = dev ? dev_name(dev) : NULL;



	return clk_get_sys(dev_id, con_id);

}

EXPORT_SYMBOL(clk_get);



void clk_put(struct clk *clk)

include/linux/clk.h

+17 −0
Original line number Diff line number Diff line
@@ -125,4 +125,21 @@ int clk_set_parent(struct clk *clk, struct clk *parent); 
 */

struct clk *clk_get_parent(struct clk *clk);



/**

 * clk_get_sys - get a clock based upon the device name

 * @dev_id: device name

 * @con_id: connection ID

 *

 * Returns a struct clk corresponding to the clock producer, or

 * valid IS_ERR() condition containing errno.  The implementation

 * uses @dev_id and @con_id to determine the clock consumer, and

 * thereby the clock producer. In contrast to clk_get() this function

 * takes the device name instead of the device itself for identification.

 *

 * Drivers must assume that the clock source is not enabled.

 *

 * clk_get_sys should not be called from within interrupt context.

 */

struct clk *clk_get_sys(const char *dev_id, const char *con_id);



#endif