diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/clk.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/clk.h b/include/linux/clk.h index b0252726df6..70cf722ac3a 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -101,6 +101,26 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb); struct clk *clk_get(struct device *dev, const char *id); /** + * devm_clk_get - lookup and obtain a managed reference to a clock producer. + * @dev: device for clock "consumer" + * @id: clock comsumer ID + * + * Returns a struct clk corresponding to the clock producer, or + * valid IS_ERR() condition containing errno. The implementation + * uses @dev and @id to determine the clock consumer, and thereby + * the clock producer. (IOW, @id may be identical strings, but + * clk_get may return different clock producers depending on @dev.) + * + * Drivers must assume that the clock source is not enabled. + * + * devm_clk_get should not be called from within interrupt context. + * + * The clock will automatically be freed when the device is unbound + * from the bus. + */ +struct clk *devm_clk_get(struct device *dev, const char *id); + +/** * clk_prepare - prepare a clock source * @clk: clock source * @@ -206,6 +226,18 @@ unsigned long clk_get_rate(struct clk *clk); */ void clk_put(struct clk *clk); +/** + * devm_clk_put - "free" a managed clock source + * @dev: device used to acuqire the clock + * @clk: clock source acquired with devm_clk_get() + * + * Note: drivers must ensure that all clk_enable calls made on this + * clock source are balanced by clk_disable calls prior to calling + * this function. + * + * clk_put should not be called from within interrupt context. + */ +void devm_clk_put(struct device *dev, struct clk *clk); /* * The remaining APIs are optional for machine class support. |