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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-12-10 17:28:07 +0000
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-01-12 14:33:01 +0000
commit476c2d83c7ffb2429b2a504fbdb4326fc8a9d0e8 (patch)
treecdc7b4161bef5aa90a9f375229dc3dc61900ea6c /drivers/regulator
parent1bf5a1f86a328122714680cd59951074b4f31e07 (diff)
regulator: Allow drivers to report voltages as selectors
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>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/core.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 671eb53b5cd..b362dbde80f 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -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);