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 <ldewan...@nvidia.com> --- drivers/regulator/core.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index b698e2b..617e337 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -904,6 +904,40 @@ static int machine_constraints_voltage(struct regulator_dev *rdev, return 0; } +static int machine_constraints_current(struct regulator_dev *rdev, + struct regulation_constraints *constraints) +{ + int current_uA; + int ret; + + if (!rdev->desc->ops->set_current_limit || + !rdev->desc->ops->get_current_limit) + return 0; + + if (!rdev->constraints->min_uA && !rdev->constraints->max_uA) + return 0; + + if (rdev->constraints->min_uA > rdev->constraints->max_uA) { + rdev_err(rdev, "Current constraint is invalid\n"); + return -EINVAL; + } + + /* Set regulator current in constraint range */ + current_uA = rdev->desc->ops->get_current_limit(rdev); + if (current_uA < rdev->constraints->min_uA || + current_uA > rdev->constraints->max_uA) { + ret = rdev->desc->ops->set_current_limit(rdev, + rdev->constraints->min_uA, + rdev->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 @@ -934,6 +968,10 @@ 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); -- 1.7.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/