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regulator: core: set current constraints while setting machine constraints 

Machine constraints is configured during regulator register. If current
constraints are provided through machine constraints then it is observed
that sometime the current configured on rail is out of range what machine
constraint has.

Set the current constraints when setting machine constraints to make
sure that rail's current is within the range of given machine constraints.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
hifive-unleashed-5.1
Laxman Dewangan 2013-09-20 13:13:02 +05:30 committed by Mark Brown
parent 00c877c69b
commit f8c1700dd7
1 changed files with 34 additions and 0 deletions
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34
drivers/regulator/core.c
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@ -923,6 +923,36 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
return 0;
}
static int machine_constraints_current(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (!constraints->min_uA && !constraints->max_uA)
return 0;
if (constraints->min_uA > constraints->max_uA) {
rdev_err(rdev, "Invalid current constraints\n");
return -EINVAL;
}
if (!ops->set_current_limit || !ops->get_current_limit) {
rdev_warn(rdev, "Operation of current configuration missing\n");
return 0;
}
/* Set regulator current in constraints range */
ret = ops->set_current_limit(rdev, constraints->min_uA,
constraints->max_uA);
if (ret < 0) {
rdev_err(rdev, "Failed to set current constraint, %d\n", ret);
return ret;
}
return 0;
}
/**
* set_machine_constraints - sets regulator constraints
* @rdev: regulator source
@ -953,6 +983,10 @@ static int set_machine_constraints(struct regulator_dev *rdev,
if (ret != 0)
goto out;
ret = machine_constraints_current(rdev, rdev->constraints);
if (ret != 0)
goto out;
/* do we need to setup our suspend state */
if (rdev->constraints->initial_state) {
ret = suspend_prepare(rdev, rdev->constraints->initial_state);