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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-05-14 11:19:45 -0700
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-05-27 10:49:09 +0100
commita4b4148379ef1ad460fc1aa6bcf2cde99cd91166 (patch)
treed4b10f5bd3dab5688f2da50a6c3d029dca4e7056 /drivers/regulator
parentafdaaafe8e829364d9c1276b5435cc28ee5619df (diff)
regulator: If we can't configure optimum mode we're always in the best one
If either a regulator driver can't tell us what the optimum mode is (or doesn't have modes in the first place) or the system doesn't allow DRMS changes then it's more helpful for users to just say that we're in the optimal mode, even if it's from a selection of one. Still report errors if the process of picking and setting a mode changes as this may indicate that we're stuck in a low power mode and unable to deliver a higher current that the consumer just asked for. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/core.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 58452ac0f165..7287000595e5 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2097,16 +2097,26 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
mutex_lock(&rdev->mutex);
+ /*
+ * first check to see if we can set modes at all, otherwise just
+ * tell the consumer everything is OK.
+ */
regulator->uA_load = uA_load;
ret = regulator_check_drms(rdev);
- if (ret < 0)
+ if (ret < 0) {
+ ret = 0;
goto out;
- ret = -EINVAL;
+ }
- /* sanity check */
if (!rdev->desc->ops->get_optimum_mode)
goto out;
+ /*
+ * we can actually do this so any errors are indicators of
+ * potential real failure.
+ */
+ ret = -EINVAL;
+
/* get output voltage */
output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0) {