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regulator: core: Add new notification for enabling of regulator

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This is useful for devices, which need some time to start up, to help
the drivers track how long the supply has been up already. Ie whether
it can safely talk to the HW or needs to wait.

Signed-off-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Harald Geyer 2017-02-23 17:06:52 +00:00 • committed by Mark Brown
parent d00b74613f
commit 264b88c9e5
2 changed files with 3 additions and 0 deletions
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2
drivers/regulator/core.c
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@ -2162,6 +2162,8 @@ static int _regulator_enable(struct regulator_dev *rdev)
if (ret < 0)
return ret;
_notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE,
NULL);
} else if (ret < 0) {
rdev_err(rdev, "is_enabled() failed: %d\n", ret);
return ret;

1
include/linux/regulator/consumer.h
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@ -119,6 +119,7 @@ struct regmap;
#define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE 0x200
#define REGULATOR_EVENT_PRE_DISABLE 0x400
#define REGULATOR_EVENT_ABORT_DISABLE 0x800
#define REGULATOR_EVENT_ENABLE 0x1000
/*
* Regulator errors that can be queried using regulator_get_error_flags