/* locks held by caller */
static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
{
- lockdep_assert_held_once(&rdev->mutex);
-
if (!rdev->constraints)
return -EINVAL;
}
}
- if (rdev->constraints->active_discharge && ops->set_active_discharge) {
- bool ad_state = (rdev->constraints->active_discharge ==
- REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
-
- ret = ops->set_active_discharge(rdev, ad_state);
- if (ret < 0) {
- rdev_err(rdev, "failed to set active discharge\n");
- return ret;
- }
- }
-
print_constraints(rdev);
return 0;
}
}
}
+#ifdef CONFIG_DEBUG_FS
+static ssize_t constraint_flags_read_file(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ const struct regulator *regulator = file->private_data;
+ const struct regulation_constraints *c = regulator->rdev->constraints;
+ char *buf;
+ ssize_t ret;
+
+ if (!c)
+ return 0;
+
+ buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = snprintf(buf, PAGE_SIZE,
+ "always_on: %u\n"
+ "boot_on: %u\n"
+ "apply_uV: %u\n"
+ "ramp_disable: %u\n"
+ "soft_start: %u\n"
+ "pull_down: %u\n"
+ "over_current_protection: %u\n",
+ c->always_on,
+ c->boot_on,
+ c->apply_uV,
+ c->ramp_disable,
+ c->soft_start,
+ c->pull_down,
+ c->over_current_protection);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+ kfree(buf);
+
+ return ret;
+}
+
+#endif
+
+static const struct file_operations constraint_flags_fops = {
+#ifdef CONFIG_DEBUG_FS
+ .open = simple_open,
+ .read = constraint_flags_read_file,
+ .llseek = default_llseek,
+#endif
+};
+
#define REG_STR_SIZE 64
static struct regulator *create_regulator(struct regulator_dev *rdev,
®ulator->min_uV);
debugfs_create_u32("max_uV", 0444, regulator->debugfs,
®ulator->max_uV);
+ debugfs_create_file("constraint_flags", 0444,
+ regulator->debugfs, regulator,
+ &constraint_flags_fops);
}
/*
}
/* Cascade always-on state to supply */
- if (_regulator_is_enabled(rdev) && rdev->supply) {
+ if (_regulator_is_enabled(rdev)) {
ret = regulator_enable(rdev->supply);
if (ret < 0) {
_regulator_put(rdev->supply);
+ rdev->supply = NULL;
return ret;
}
}
static int _regulator_get_voltage(struct regulator_dev *rdev)
{
int sel, ret;
+ bool bypassed;
+
+ if (rdev->desc->ops->get_bypass) {
+ ret = rdev->desc->ops->get_bypass(rdev, &bypassed);
+ if (ret < 0)
+ return ret;
+ if (bypassed) {
+ /* if bypassed the regulator must have a supply */
+ if (!rdev->supply) {
+ rdev_err(rdev,
+ "bypassed regulator has no supply!\n");
+ return -EPROBE_DEFER;
+ }
+
+ return _regulator_get_voltage(rdev->supply->rdev);
+ }
+ }
if (rdev->desc->ops->get_voltage_sel) {
sel = rdev->desc->ops->get_voltage_sel(rdev);
&rdev->bypass_count);
}
+static int regulator_register_resolve_supply(struct device *dev, void *data)
+{
+ struct regulator_dev *rdev = dev_to_rdev(dev);
+
+ if (regulator_resolve_supply(rdev))
+ rdev_dbg(rdev, "unable to resolve supply\n");
+
+ return 0;
+}
+
/**
* regulator_register - register regulator
* @regulator_desc: regulator to register
rdev->dev.of_node = of_node_get(config->of_node);
}
- mutex_lock(®ulator_list_mutex);
-
mutex_init(&rdev->mutex);
rdev->reg_data = config->driver_data;
rdev->owner = regulator_desc->owner;
if ((config->ena_gpio || config->ena_gpio_initialized) &&
gpio_is_valid(config->ena_gpio)) {
+ mutex_lock(®ulator_list_mutex);
ret = regulator_ena_gpio_request(rdev, config);
+ mutex_unlock(®ulator_list_mutex);
if (ret != 0) {
rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
config->ena_gpio, ret);
rdev->dev.parent = dev;
dev_set_name(&rdev->dev, "regulator.%lu",
(unsigned long) atomic_inc_return(®ulator_no));
- ret = device_register(&rdev->dev);
- if (ret != 0) {
- put_device(&rdev->dev);
- goto wash;
- }
-
- dev_set_drvdata(&rdev->dev, rdev);
/* set regulator constraints */
if (init_data)
constraints = &init_data->constraints;
- ret = set_machine_constraints(rdev, constraints);
- if (ret < 0)
- goto scrub;
-
if (init_data && init_data->supply_regulator)
rdev->supply_name = init_data->supply_regulator;
else if (regulator_desc->supply_name)
rdev->supply_name = regulator_desc->supply_name;
+ /*
+ * Attempt to resolve the regulator supply, if specified,
+ * but don't return an error if we fail because we will try
+ * to resolve it again later as more regulators are added.
+ */
+ if (regulator_resolve_supply(rdev))
+ rdev_dbg(rdev, "unable to resolve supply\n");
+
+ ret = set_machine_constraints(rdev, constraints);
+ if (ret < 0)
+ goto wash;
+
/* add consumers devices */
if (init_data) {
+ mutex_lock(®ulator_list_mutex);
for (i = 0; i < init_data->num_consumer_supplies; i++) {
ret = set_consumer_device_supply(rdev,
init_data->consumer_supplies[i].dev_name,
init_data->consumer_supplies[i].supply);
if (ret < 0) {
+ mutex_unlock(®ulator_list_mutex);
dev_err(dev, "Failed to set supply %s\n",
init_data->consumer_supplies[i].supply);
goto unset_supplies;
}
}
+ mutex_unlock(®ulator_list_mutex);
+ }
+
+ ret = device_register(&rdev->dev);
+ if (ret != 0) {
+ put_device(&rdev->dev);
+ goto unset_supplies;
}
+ dev_set_drvdata(&rdev->dev, rdev);
rdev_init_debugfs(rdev);
-out:
- mutex_unlock(®ulator_list_mutex);
+
+ /* try to resolve regulators supply since a new one was registered */
+ class_for_each_device(®ulator_class, NULL, NULL,
+ regulator_register_resolve_supply);
kfree(config);
return rdev;
unset_supplies:
+ mutex_lock(®ulator_list_mutex);
unset_regulator_supplies(rdev);
-
-scrub:
- regulator_ena_gpio_free(rdev);
- device_unregister(&rdev->dev);
- /* device core frees rdev */
- rdev = ERR_PTR(ret);
- goto out;
-
+ mutex_unlock(®ulator_list_mutex);
wash:
+ kfree(rdev->constraints);
+ mutex_lock(®ulator_list_mutex);
regulator_ena_gpio_free(rdev);
+ mutex_unlock(®ulator_list_mutex);
clean:
kfree(rdev);
- rdev = ERR_PTR(ret);
- goto out;
+ kfree(config);
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(regulator_register);
WARN_ON(rdev->open_count);
unset_regulator_supplies(rdev);
list_del(&rdev->list);
- mutex_unlock(®ulator_list_mutex);
regulator_ena_gpio_free(rdev);
+ mutex_unlock(®ulator_list_mutex);
device_unregister(&rdev->dev);
}
EXPORT_SYMBOL_GPL(regulator_unregister);
projects / cascardo / linux.git / blobdiff