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regulator: core: Add checking set_mode callback in regulator_set_optimum_mode 

regulator_set_optimum_mode needs set_mode to properly work.
Add checking for set_mode callback in case it may be not implemented.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-04-16 18:44:23 +08:00 committed by Mark Brown
parent 8ac0e95d64
commit 854ccbaee7
1 changed files with 3 additions and 0 deletions
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3
drivers/regulator/core.c
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@ -2335,6 +2335,9 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
*/
ret = -EINVAL;
if (!rdev->desc->ops->set_mode)
goto out;
/* get output voltage */
output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0) {