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regulator: Additional diagnostics for machine constraints

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Try to find a human readable name for the regulator we're failing on and
print a specific diagnostic when we fail to set the suspend state.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2008-09-09 16:21:19 +01:00 committed by Liam Girdwood
parent 46fabe1edd
commit e06f5b4fea
1 changed files with 19 additions and 4 deletions
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23
drivers/regulator/core.c
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@ -669,6 +669,14 @@ static int set_machine_constraints(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
int ret = 0;
const char *name;
if (constraints->name)
name = constraints->name;
else if (rdev->desc->name)
name = rdev->desc->name;
else
name = "regulator";
rdev->constraints = constraints;
@ -679,9 +687,9 @@ static int set_machine_constraints(struct regulator_dev *rdev,
ret = rdev->desc->ops->set_voltage(rdev,
rdev->constraints->min_uV, rdev->constraints->max_uV);
if (ret < 0) {
printk(KERN_ERR "%s: failed to apply %duV"
" constraint\n", __func__,
rdev->constraints->min_uV);
printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n",
__func__,
rdev->constraints->min_uV, name);
rdev->constraints = NULL;
goto out;
}
@ -692,8 +700,15 @@ static int set_machine_constraints(struct regulator_dev *rdev,
rdev->use_count = 1;
/* do we need to setup our suspend state */
if (constraints->initial_state)
if (constraints->initial_state) {
ret = suspend_prepare(rdev, constraints->initial_state);
if (ret < 0) {
printk(KERN_ERR "%s: failed to set suspend state for %s\n",
__func__, name);
rdev->constraints = NULL;
goto out;
}
}
print_constraints(rdev);
out: