diff options
author | Chanwoo Choi <cw00.choi@samsung.com> | 2015-07-14 18:45:27 +0900 |
---|---|---|
committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:46:48 +0900 |
commit | e295ac9b928e9fe0a33b9fee2ac27f210b78dbec (patch) | |
tree | 21e9295da3560f3a8ac7b119739734a406a9cfa9 /drivers/devfreq/devfreq.c | |
parent | ca88176a87dd14e3fe479341b6f4242b55f4ebe8 (diff) |
PM: devfreq: Add the prototype of update_devfreq() to export
This patch add simply the protoptye of update_devfreq() to devfreq.h header
file to export it. The some device driver (e.g., thermal cooling device) may
use the update_devfreq() to update the range of supported frequency of devfreq
device.
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/devfreq/devfreq.c')
-rw-r--r-- | drivers/devfreq/devfreq.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index ca1b362d77e2..2aa5e4e9df36 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -163,18 +163,17 @@ int update_devfreq(struct devfreq *devfreq) int err = 0; u32 flags = 0; - if (!mutex_is_locked(&devfreq->lock)) { - WARN(true, "devfreq->lock must be locked by the caller.\n"); - return -EINVAL; - } - if (!devfreq->governor) return -EINVAL; + mutex_lock(&devfreq->lock); + /* Reevaluate the proper frequency */ err = devfreq->governor->get_target_freq(devfreq, &freq); - if (err) + if (err) { + mutex_unlock(&devfreq->lock); return err; + } /* * Adjust the freuqency with user freq and QoS. @@ -194,8 +193,10 @@ int update_devfreq(struct devfreq *devfreq) } err = devfreq->profile->target(devfreq->dev.parent, &freq, flags); - if (err) + if (err) { + mutex_unlock(&devfreq->lock); return err; + } if (devfreq->profile->freq_table) if (devfreq_update_status(devfreq, freq)) @@ -203,6 +204,9 @@ int update_devfreq(struct devfreq *devfreq) "Couldn't update frequency transition information.\n"); devfreq->previous_freq = freq; + + mutex_unlock(&devfreq->lock); + return err; } EXPORT_SYMBOL(update_devfreq); @@ -218,14 +222,12 @@ static void devfreq_monitor(struct work_struct *work) struct devfreq *devfreq = container_of(work, struct devfreq, work.work); - mutex_lock(&devfreq->lock); err = update_devfreq(devfreq); if (err) dev_err(&devfreq->dev, "dvfs failed with (%d) error\n", err); queue_delayed_work(devfreq_wq, &devfreq->work, msecs_to_jiffies(devfreq->profile->polling_ms)); - mutex_unlock(&devfreq->lock); } /** @@ -382,9 +384,7 @@ static int devfreq_notifier_call(struct notifier_block *nb, unsigned long type, struct devfreq *devfreq = container_of(nb, struct devfreq, nb); int ret; - mutex_lock(&devfreq->lock); ret = update_devfreq(devfreq); - mutex_unlock(&devfreq->lock); return ret; } |