diff options
| author |   Richard Fitzgerald <rf@opensource.wolfsonmicro.com> | 2014-11-24 14:10:52 +0000 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2014-11-24 15:26:02 +0000 |
| commit | a1c8a5512b7cddc81767172f0de37b155cea039f (patch) | |
| tree | 23404a6a919910d9909d5261e0119748ade7e725 /drivers/regulator | |
| parent | Linux 3.18-rc1 (diff) | |
| download | linux-dev-a1c8a5512b7cddc81767172f0de37b155cea039f.tar.xz linux-dev-a1c8a5512b7cddc81767172f0de37b155cea039f.zip | |
regulator: core: Add PRE_DISABLE notification
Add a PRE_DISABLE notification so that consumers can use a
notifier to run any steps required to prepare for the
regulator being switched off. Since the regulator disable
can fail an abort notification is also added.
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index cd87c0c37034..53de911a0954 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1976,9 +1976,18 @@ static int _regulator_disable(struct regulator_dev *rdev) /* we are last user */ if (_regulator_can_change_status(rdev)) { + ret = _notifier_call_chain(rdev, + REGULATOR_EVENT_PRE_DISABLE, + NULL); + if (ret & NOTIFY_STOP_MASK) + return -EINVAL; + ret = _regulator_do_disable(rdev); if (ret < 0) { rdev_err(rdev, "failed to disable\n"); + _notifier_call_chain(rdev, + REGULATOR_EVENT_ABORT_DISABLE, + NULL); return ret; } _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, @@ -2035,9 +2044,16 @@ static int _regulator_force_disable(struct regulator_dev *rdev) { int ret = 0; + ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | + REGULATOR_EVENT_PRE_DISABLE, NULL); + if (ret & NOTIFY_STOP_MASK) + return -EINVAL; + ret = _regulator_do_disable(rdev); if (ret < 0) { rdev_err(rdev, "failed to force disable\n"); + _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | + REGULATOR_EVENT_ABORT_DISABLE, NULL); return ret; } |