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regulator: improved mode error checks 

Minor bugfixes in handling of regulator modes:

 - have the routine verifying regulator modes check against
   the set of legal modes (!);

 - have regulator_set_optimum_mode() verify the return value
   of regulator_ops.get_optimum_mode(), like drms_uA_update();

 - one call to regulator_ops.set_mode() treated zero as a
   failure code; make this consistent with other callers.

Both regulator_set_mode() and regulator_set_optimum_mode() now
require valid_ops_mask to include REGULATOR_CHANGE_MODE; that
seems like a bugfix too.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
David Brownell 2008-11-16 11:46:56 -08:00 committed by Liam Girdwood
parent 412aec6105
commit e573520b17
1 changed files with 13 additions and 2 deletions
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15
drivers/regulator/core.c
View File

@ -174,6 +174,16 @@ static int regulator_check_current_limit(struct regulator_dev *rdev,
/* operating mode constraint check */
static int regulator_check_mode(struct regulator_dev *rdev, int mode)
{
switch (mode) {
case REGULATOR_MODE_FAST:
case REGULATOR_MODE_NORMAL:
case REGULATOR_MODE_IDLE:
case REGULATOR_MODE_STANDBY:
break;
default:
return -EINVAL;
}
if (!rdev->constraints) {
printk(KERN_ERR "%s: no constraints for %s\n", __func__,
rdev->desc->name);
@ -1494,7 +1504,8 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
mode = rdev->desc->ops->get_optimum_mode(rdev,
input_uV, output_uV,
total_uA_load);
if (ret <= 0) {
ret = regulator_check_mode(rdev, mode);
if (ret < 0) {
printk(KERN_ERR "%s: failed to get optimum mode for %s @"
" %d uA %d -> %d uV\n", __func__, rdev->desc->name,
total_uA_load, input_uV, output_uV);
@ -1502,7 +1513,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
}
ret = rdev->desc->ops->set_mode(rdev, mode);
if (ret <= 0) {
if (ret < 0) {
printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n",
__func__, mode, rdev->desc->name);
goto out;