summaryrefslogtreecommitdiff
path: root/drivers/regulator/core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/regulator/core.c')
-rw-r--r--drivers/regulator/core.c73
1 files changed, 43 insertions, 30 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b38a6b669e8c..bac485acc7f3 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -953,6 +953,8 @@ static int machine_constraints_current(struct regulator_dev *rdev,
return 0;
}
+static int _regulator_do_enable(struct regulator_dev *rdev);
+
/**
* set_machine_constraints - sets regulator constraints
* @rdev: regulator source
@@ -1013,10 +1015,9 @@ static int set_machine_constraints(struct regulator_dev *rdev,
/* If the constraints say the regulator should be on at this point
* and we have control then make sure it is enabled.
*/
- if ((rdev->constraints->always_on || rdev->constraints->boot_on) &&
- ops->enable) {
- ret = ops->enable(rdev);
- if (ret < 0) {
+ if (rdev->constraints->always_on || rdev->constraints->boot_on) {
+ ret = _regulator_do_enable(rdev);
+ if (ret < 0 && ret != -EINVAL) {
rdev_err(rdev, "failed to enable\n");
goto out;
}
@@ -1272,6 +1273,8 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
if (r->dev.parent &&
node == r->dev.of_node)
return r;
+ *ret = -EPROBE_DEFER;
+ return NULL;
} else {
/*
* If we couldn't even get the node then it's
@@ -1312,7 +1315,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
struct regulator_dev *rdev;
struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
const char *devname = NULL;
- int ret = -EPROBE_DEFER;
+ int ret;
if (id == NULL) {
pr_err("get() with no identifier\n");
@@ -1322,6 +1325,11 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
if (dev)
devname = dev_name(dev);
+ if (have_full_constraints())
+ ret = -ENODEV;
+ else
+ ret = -EPROBE_DEFER;
+
mutex_lock(&regulator_list_mutex);
rdev = regulator_dev_lookup(dev, id, &ret);
@@ -1352,7 +1360,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
goto found;
/* Don't log an error when called from regulator_get_optional() */
} else if (!have_full_constraints() || exclusive) {
- dev_err(dev, "dummy supplies not allowed\n");
+ dev_warn(dev, "dummy supplies not allowed\n");
}
mutex_unlock(&regulator_list_mutex);
@@ -1900,8 +1908,6 @@ static int _regulator_do_disable(struct regulator_dev *rdev)
trace_regulator_disable_complete(rdev_get_name(rdev));
- _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
- NULL);
return 0;
}
@@ -1925,6 +1931,8 @@ static int _regulator_disable(struct regulator_dev *rdev)
rdev_err(rdev, "failed to disable\n");
return ret;
}
+ _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
+ NULL);
}
rdev->use_count = 0;
@@ -1977,20 +1985,16 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
{
int ret = 0;
- /* force disable */
- if (rdev->desc->ops->disable) {
- /* ah well, who wants to live forever... */
- ret = rdev->desc->ops->disable(rdev);
- if (ret < 0) {
- rdev_err(rdev, "failed to force disable\n");
- return ret;
- }
- /* notify other consumers that power has been forced off */
- _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
- REGULATOR_EVENT_DISABLE, NULL);
+ ret = _regulator_do_disable(rdev);
+ if (ret < 0) {
+ rdev_err(rdev, "failed to force disable\n");
+ return ret;
}
- return ret;
+ _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
+ REGULATOR_EVENT_DISABLE, NULL);
+
+ return 0;
}
/**
@@ -2395,6 +2399,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
int old_min_uV, old_max_uV;
+ int current_uV;
mutex_lock(&rdev->mutex);
@@ -2405,6 +2410,19 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
if (regulator->min_uV == min_uV && regulator->max_uV == max_uV)
goto out;
+ /* If we're trying to set a range that overlaps the current voltage,
+ * return succesfully even though the regulator does not support
+ * changing the voltage.
+ */
+ if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
+ current_uV = _regulator_get_voltage(rdev);
+ if (min_uV <= current_uV && current_uV <= max_uV) {
+ regulator->min_uV = min_uV;
+ regulator->max_uV = max_uV;
+ goto out;
+ }
+ }
+
/* sanity check */
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
@@ -3623,23 +3641,18 @@ int regulator_suspend_finish(void)
mutex_lock(&regulator_list_mutex);
list_for_each_entry(rdev, &regulator_list, list) {
- struct regulator_ops *ops = rdev->desc->ops;
-
mutex_lock(&rdev->mutex);
- if ((rdev->use_count > 0 || rdev->constraints->always_on) &&
- ops->enable) {
- error = ops->enable(rdev);
+ if (rdev->use_count > 0 || rdev->constraints->always_on) {
+ error = _regulator_do_enable(rdev);
if (error)
ret = error;
} else {
if (!have_full_constraints())
goto unlock;
- if (!ops->disable)
- goto unlock;
if (!_regulator_is_enabled(rdev))
goto unlock;
- error = ops->disable(rdev);
+ error = _regulator_do_disable(rdev);
if (error)
ret = error;
}
@@ -3813,7 +3826,7 @@ static int __init regulator_init_complete(void)
ops = rdev->desc->ops;
c = rdev->constraints;
- if (!ops->disable || (c && c->always_on))
+ if (c && c->always_on)
continue;
mutex_lock(&rdev->mutex);
@@ -3834,7 +3847,7 @@ static int __init regulator_init_complete(void)
/* We log since this may kill the system if it
* goes wrong. */
rdev_info(rdev, "disabling\n");
- ret = ops->disable(rdev);
+ ret = _regulator_do_disable(rdev);
if (ret != 0)
rdev_err(rdev, "couldn't disable: %d\n", ret);
} else {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 13:01:11 +0000