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PM: runtime: add devm_pm_clk_create helper 

A typical code pattern for pm_clk_create() call is to call it in the
_probe function and to call pm_clk_destroy() both from _probe error path
and from _remove function. For some drivers the whole remove function
would consist of the call to pm_remove_disable().

Add helper function to replace this bolierplate piece of code. Calling
devm_pm_clk_create() removes the need for calling pm_clk_destroy() both
in the probe()'s error path and in the remove() function.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210731195034.979084-3-dmitry.baryshkov@linaro.org
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2021-07-31 22:50:33 +03:00 committed by Stephen Boyd
parent b3636a3a2c
commit a649136b17
2 changed files with 22 additions and 0 deletions
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17
drivers/base/power/clock_ops.c
View File

@ -519,6 +519,23 @@ void pm_clk_destroy(struct device *dev)
}
EXPORT_SYMBOL_GPL(pm_clk_destroy);
static void pm_clk_destroy_action(void *data)
{
pm_clk_destroy(data);
}
int devm_pm_clk_create(struct device *dev)
{
int ret;
ret = pm_clk_create(dev);
if (ret)
return ret;
return devm_add_action_or_reset(dev, pm_clk_destroy_action, dev);
}
EXPORT_SYMBOL_GPL(devm_pm_clk_create);
/**
* pm_clk_suspend - Disable clocks in a device's PM clock list.
* @dev: Device to disable the clocks for.

5
include/linux/pm_clock.h
View File

@ -47,6 +47,7 @@ extern void pm_clk_remove(struct device *dev, const char *con_id);
extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
extern int pm_clk_suspend(struct device *dev);
extern int pm_clk_resume(struct device *dev);
extern int devm_pm_clk_create(struct device *dev);
#else
static inline bool pm_clk_no_clocks(struct device *dev)
{
@ -83,6 +84,10 @@ static inline void pm_clk_remove(struct device *dev, const char *con_id)
static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
{
}
static inline int devm_pm_clk_create(struct device *dev)
{
return -EINVAL;
}
#endif
#ifdef CONFIG_HAVE_CLK