struct regulator {
struct device *dev;
struct list_head list;
+ unsigned int always_on:1;
int uA_load;
int min_uV;
int max_uV;
return regnode;
}
+static int _regulator_can_change_status(struct regulator_dev *rdev)
+{
+ if (!rdev->constraints)
+ return 0;
+
+ if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS)
+ return 1;
+ else
+ return 0;
+}
+
/* Platform voltage constraint check */
static int regulator_check_voltage(struct regulator_dev *rdev,
int *min_uV, int *max_uV)
/* get input voltage */
input_uV = 0;
if (rdev->supply)
- input_uV = _regulator_get_voltage(rdev);
+ input_uV = regulator_get_voltage(rdev->supply);
if (input_uV <= 0)
input_uV = rdev->constraints->input_uV;
if (input_uV <= 0)
struct regulator_state *rstate)
{
int ret = 0;
- bool can_set_state;
-
- can_set_state = rdev->desc->ops->set_suspend_enable &&
- rdev->desc->ops->set_suspend_disable;
/* If we have no suspend mode configration don't set anything;
- * only warn if the driver actually makes the suspend mode
- * configurable.
+ * only warn if the driver implements set_suspend_voltage or
+ * set_suspend_mode callback.
*/
if (!rstate->enabled && !rstate->disabled) {
- if (can_set_state)
+ if (rdev->desc->ops->set_suspend_voltage ||
+ rdev->desc->ops->set_suspend_mode)
rdev_warn(rdev, "No configuration\n");
return 0;
}
return -EINVAL;
}
- if (!can_set_state) {
- rdev_err(rdev, "no way to set suspend state\n");
- return -EINVAL;
- }
-
- if (rstate->enabled)
+ if (rstate->enabled && rdev->desc->ops->set_suspend_enable)
ret = rdev->desc->ops->set_suspend_enable(rdev);
- else
+ else if (rstate->disabled && rdev->desc->ops->set_suspend_disable)
ret = rdev->desc->ops->set_suspend_disable(rdev);
+ else /* OK if set_suspend_enable or set_suspend_disable is NULL */
+ ret = 0;
+
if (ret < 0) {
rdev_err(rdev, "failed to enabled/disable\n");
return ret;
®ulator->max_uV);
}
+ /*
+ * Check now if the regulator is an always on regulator - if
+ * it is then we don't need to do nearly so much work for
+ * enable/disable calls.
+ */
+ if (!_regulator_can_change_status(rdev) &&
+ _regulator_is_enabled(rdev))
+ regulator->always_on = true;
+
mutex_unlock(&rdev->mutex);
return regulator;
link_name_err:
}
static struct regulator_dev *regulator_dev_lookup(struct device *dev,
- const char *supply)
+ const char *supply,
+ int *ret)
{
struct regulator_dev *r;
struct device_node *node;
+ struct regulator_map *map;
+ const char *devname = NULL;
/* first do a dt based lookup */
if (dev && dev->of_node) {
node = of_get_regulator(dev, supply);
- if (node)
+ if (node) {
list_for_each_entry(r, ®ulator_list, list)
if (r->dev.parent &&
node == r->dev.of_node)
return r;
+ } else {
+ /*
+ * If we couldn't even get the node then it's
+ * not just that the device didn't register
+ * yet, there's no node and we'll never
+ * succeed.
+ */
+ *ret = -ENODEV;
+ }
}
/* if not found, try doing it non-dt way */
+ if (dev)
+ devname = dev_name(dev);
+
list_for_each_entry(r, ®ulator_list, list)
if (strcmp(rdev_get_name(r), supply) == 0)
return r;
+ list_for_each_entry(map, ®ulator_map_list, list) {
+ /* If the mapping has a device set up it must match */
+ if (map->dev_name &&
+ (!devname || strcmp(map->dev_name, devname)))
+ continue;
+
+ if (strcmp(map->supply, supply) == 0)
+ return map->regulator;
+ }
+
+
return NULL;
}
int exclusive)
{
struct regulator_dev *rdev;
- struct regulator_map *map;
struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
const char *devname = NULL;
int ret;
mutex_lock(®ulator_list_mutex);
- rdev = regulator_dev_lookup(dev, id);
+ rdev = regulator_dev_lookup(dev, id, &ret);
if (rdev)
goto found;
- list_for_each_entry(map, ®ulator_map_list, list) {
- /* If the mapping has a device set up it must match */
- if (map->dev_name &&
- (!devname || strcmp(map->dev_name, devname)))
- continue;
-
- if (strcmp(map->supply, id) == 0) {
- rdev = map->regulator;
- goto found;
- }
- }
-
if (board_wants_dummy_regulator) {
rdev = dummy_regulator_rdev;
goto found;
}
EXPORT_SYMBOL_GPL(devm_regulator_put);
-static int _regulator_can_change_status(struct regulator_dev *rdev)
-{
- if (!rdev->constraints)
- return 0;
-
- if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS)
- return 1;
- else
- return 0;
-}
-
/* locks held by regulator_enable() */
static int _regulator_enable(struct regulator_dev *rdev)
{
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
+ if (regulator->always_on)
+ return 0;
+
if (rdev->supply) {
ret = regulator_enable(rdev->supply);
if (ret != 0)
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
+ if (regulator->always_on)
+ return 0;
+
mutex_lock(&rdev->mutex);
ret = _regulator_disable(rdev);
mutex_unlock(&rdev->mutex);
struct regulator_dev *rdev = regulator->rdev;
int ret;
+ if (regulator->always_on)
+ return 0;
+
mutex_lock(&rdev->mutex);
rdev->deferred_disables++;
mutex_unlock(&rdev->mutex);
{
int ret;
+ if (regulator->always_on)
+ return 1;
+
mutex_lock(®ulator->rdev->mutex);
ret = _regulator_is_enabled(regulator->rdev);
mutex_unlock(®ulator->rdev->mutex);
int ret;
int delay = 0;
unsigned int selector;
+ int old_selector = -1;
+ int best_val = INT_MAX;
trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
min_uV += rdev->constraints->uV_offset;
max_uV += rdev->constraints->uV_offset;
+ /*
+ * If we can't obtain the old selector there is not enough
+ * info to call set_voltage_time_sel().
+ */
+ if (rdev->desc->ops->set_voltage_time_sel &&
+ rdev->desc->ops->get_voltage_sel) {
+ old_selector = rdev->desc->ops->get_voltage_sel(rdev);
+ if (old_selector < 0)
+ return old_selector;
+ }
+
if (rdev->desc->ops->set_voltage) {
ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV,
&selector);
if (rdev->desc->ops->list_voltage)
- selector = rdev->desc->ops->list_voltage(rdev,
+ best_val = rdev->desc->ops->list_voltage(rdev,
selector);
else
- selector = -1;
+ best_val = -1;
} else if (rdev->desc->ops->set_voltage_sel) {
- int best_val = INT_MAX;
int i;
selector = 0;
}
}
- /*
- * If we can't obtain the old selector there is not enough
- * info to call set_voltage_time_sel().
- */
- if (rdev->desc->ops->set_voltage_time_sel &&
- rdev->desc->ops->get_voltage_sel) {
- unsigned int old_selector = 0;
-
- ret = rdev->desc->ops->get_voltage_sel(rdev);
- if (ret < 0)
- return ret;
- old_selector = ret;
- ret = rdev->desc->ops->set_voltage_time_sel(rdev,
- old_selector, selector);
- if (ret < 0)
- rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n", ret);
- else
- delay = ret;
- }
-
- if (best_val != INT_MAX) {
+ if (best_val != INT_MAX)
ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
- selector = best_val;
- } else {
+ else
ret = -EINVAL;
- }
} else {
ret = -EINVAL;
}
+ /* Call set_voltage_time_sel if successfully obtained old_selector */
+ if (ret == 0 && old_selector >= 0 &&
+ rdev->desc->ops->set_voltage_time_sel) {
+
+ delay = rdev->desc->ops->set_voltage_time_sel(rdev,
+ old_selector, selector);
+ if (delay < 0) {
+ rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n",
+ delay);
+ delay = 0;
+ }
+ }
+
/* Insert any necessary delays */
if (delay >= 1000) {
mdelay(delay / 1000);
_notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE,
NULL);
- trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector);
+ trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val);
return ret;
}
*/
ret = -EINVAL;
+ if (!rdev->desc->ops->set_mode)
+ goto out;
+
/* get output voltage */
output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0) {
int i;
int ret = 0;
- for (i = 0; i < num_consumers; i++)
- async_schedule_domain(regulator_bulk_enable_async,
- &consumers[i], &async_domain);
+ for (i = 0; i < num_consumers; i++) {
+ if (consumers[i].consumer->always_on)
+ consumers[i].ret = 0;
+ else
+ async_schedule_domain(regulator_bulk_enable_async,
+ &consumers[i], &async_domain);
+ }
async_synchronize_full_domain(&async_domain);
struct regulator_bulk_data *consumers)
{
int i;
- int ret;
+ int ret, r;
for (i = num_consumers - 1; i >= 0; --i) {
ret = regulator_disable(consumers[i].consumer);
err:
pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret);
- for (++i; i < num_consumers; ++i)
- regulator_enable(consumers[i].consumer);
+ for (++i; i < num_consumers; ++i) {
+ r = regulator_enable(consumers[i].consumer);
+ if (r != 0)
+ pr_err("Failed to reename %s: %d\n",
+ consumers[i].supply, r);
+ }
return ret;
}
return status;
}
- /* suspend mode constraints need multiple supporting methods */
- if (!(ops->set_suspend_enable && ops->set_suspend_disable))
- return status;
-
status = device_create_file(dev, &dev_attr_suspend_standby_state);
if (status < 0)
return status;
if (supply) {
struct regulator_dev *r;
- r = regulator_dev_lookup(dev, supply);
+ r = regulator_dev_lookup(dev, supply, &ret);
if (!r) {
dev_err(dev, "Failed to find supply %s\n", supply);
projects / firefly-linux-kernel-4.4.55.git / blobdiff