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PM / devfreq: Add devfreq_get_devfreq_by_phandle()

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This patch adds the new devfreq_get_devfreq_by_phandle() OF helper function
which can find the instance of devfreq device by using phandle ("devfreq").

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
[m.reichl and linux.amoon: Tested it on exynos4412-odroidu3 board]
Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
This commit is contained in:
Chanwoo Choi
2015-11-10 20:31:07 +09:00
committed by MyungJoo Ham
parent 72c160bda1
commit 8f510aeb22
2 changed files with 53 additions and 0 deletions
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9
include/linux/devfreq.h
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@@ -208,6 +208,9 @@ extern int devm_devfreq_register_opp_notifier(struct device *dev,
extern void devm_devfreq_unregister_opp_notifier(struct device *dev,
struct devfreq *devfreq);
extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
int index);
/**
* devfreq_update_stats() - update the last_status pointer in struct devfreq
* @df: the devfreq instance whose status needs updating
@@ -307,6 +310,12 @@ static inline void devm_devfreq_unregister_opp_notifier(struct device *dev,
{
}
static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev,
int index)
{
return ERR_PTR(-ENODEV);
}
static inline int devfreq_update_stats(struct devfreq *df)
{
return -EINVAL;