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regulator: Allow drivers to report voltages as selectors

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Since drivers already have to provide an API for translating selectors
into voltages they may as well just report the selector values directly
to the core API rather than implement the lookup themselves. The old
interface is left in place for now, but may be removed in future.

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 2010-12-10 17:28:07 +00:00 committed by Liam Girdwood
parent 1bf5a1f86a
commit 476c2d83c7
2 changed files with 25 additions and 3 deletions
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25
drivers/regulator/core.c
View File

@ -577,7 +577,9 @@ static void drms_uA_update(struct regulator_dev *rdev)
err = regulator_check_drms(rdev);
if (err < 0 || !rdev->desc->ops->get_optimum_mode ||
!rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode)
(!rdev->desc->ops->get_voltage &&
!rdev->desc->ops->get_voltage_sel) ||
!rdev->desc->ops->set_mode)
return;
/* get output voltage */
@ -1682,7 +1684,14 @@ EXPORT_SYMBOL_GPL(regulator_set_voltage);
static int _regulator_get_voltage(struct regulator_dev *rdev)
{
/* sanity check */
int sel;
if (rdev->desc->ops->get_voltage_sel) {
sel = rdev->desc->ops->get_voltage_sel(rdev);
if (sel < 0)
return sel;
return rdev->desc->ops->list_voltage(rdev, sel);
}
if (rdev->desc->ops->get_voltage)
return rdev->desc->ops->get_voltage(rdev);
else
@ -2191,7 +2200,7 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
int status = 0;
/* some attributes need specific methods to be displayed */
if (ops->get_voltage) {
if (ops->get_voltage || ops->get_voltage_sel) {
status = device_create_file(dev, &dev_attr_microvolts);
if (status < 0)
return status;
@ -2327,6 +2336,16 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
if (!init_data)
return ERR_PTR(-EINVAL);
/* Only one of each should be implemented */
WARN_ON(regulator_desc->ops->get_voltage &&
regulator_desc->ops->get_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);
}
rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL);
if (rdev == NULL)
return ERR_PTR(-ENOMEM);

3
include/linux/regulator/driver.h
View File

@ -43,6 +43,8 @@ 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.
* @get_voltage: Return the currently configured voltage for the regulator.
* @get_voltage_sel: Return the currently configured voltage selector for the
* regulator.
* @list_voltage: Return one of the supported voltages, in microvolts; zero
* if the selector indicates a voltage that is unusable on this system;
* or negative errno. Selectors range from zero to one less than
@ -82,6 +84,7 @@ struct regulator_ops {
int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
unsigned *selector);
int (*get_voltage) (struct regulator_dev *);
int (*get_voltage_sel) (struct regulator_dev *);
/* get/set regulator current */
int (*set_current_limit) (struct regulator_dev *,