diff options
| -rw-r--r-- | drivers/regulator/core.c | 37 | ||||
| -rw-r--r-- | include/linux/regulator/driver.h | 3 |
2 files changed, 38 insertions, 2 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 23c5f7c80bf..a0579f06900 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1637,6 +1637,32 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev, selector); else selector = -1; + } else if (rdev->desc->ops->set_voltage_sel) { + int best_val = INT_MAX; + int i; + + selector = 0; + + /* Find the smallest voltage that falls within the specified + * range. + */ + for (i = 0; i < rdev->desc->n_voltages; i++) { + ret = rdev->desc->ops->list_voltage(rdev, i); + if (ret < 0) + continue; + + if (ret < best_val && ret >= min_uV && ret <= max_uV) { + best_val = ret; + selector = i; + } + } + + if (best_val != INT_MAX) { + ret = rdev->desc->ops->set_voltage_sel(rdev, selector); + selector = best_val; + } else { + ret = -EINVAL; + } } else { ret = -EINVAL; } @@ -1672,7 +1698,8 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) mutex_lock(&rdev->mutex); /* sanity check */ - if (!rdev->desc->ops->set_voltage) { + if (!rdev->desc->ops->set_voltage && + !rdev->desc->ops->set_voltage_sel) { ret = -EINVAL; goto out; } @@ -2256,7 +2283,7 @@ static int add_regulator_attributes(struct regulator_dev *rdev) return status; /* constraints need specific supporting methods */ - if (ops->set_voltage) { + if (ops->set_voltage || ops->set_voltage_sel) { status = device_create_file(dev, &dev_attr_min_microvolts); if (status < 0) return status; @@ -2354,12 +2381,18 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, /* Only one of each should be implemented */ WARN_ON(regulator_desc->ops->get_voltage && regulator_desc->ops->get_voltage_sel); + WARN_ON(regulator_desc->ops->set_voltage && + regulator_desc->ops->set_voltage_sel); /* If we're using selectors we must implement list_voltage. */ if (regulator_desc->ops->get_voltage_sel && !regulator_desc->ops->list_voltage) { return ERR_PTR(-EINVAL); } + if (regulator_desc->ops->set_voltage_sel && + !regulator_desc->ops->list_voltage) { + return ERR_PTR(-EINVAL); + } rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); if (rdev == NULL) diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index bf3e653591b..975ae06cb63 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -42,6 +42,8 @@ enum regulator_status { * * @set_voltage: Set the voltage for the regulator within the range specified. * The driver should select the voltage closest to min_uV. + * @set_voltage_sel: Set the voltage for the regulator using the specified + * selector. * @get_voltage: Return the currently configured voltage for the regulator. * @get_voltage_sel: Return the currently configured voltage selector for the * regulator. @@ -83,6 +85,7 @@ struct regulator_ops { /* get/set regulator voltage */ int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV, unsigned *selector); + int (*set_voltage_sel) (struct regulator_dev *, unsigned selector); int (*get_voltage) (struct regulator_dev *); int (*get_voltage_sel) (struct regulator_dev *); |