*
*/
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/regulator.h>
+
#include "dummy.h"
-#define REGULATOR_VERSION "0.5"
+#define rdev_err(rdev, fmt, ...) \
+ pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
+#define rdev_warn(rdev, fmt, ...) \
+ pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
+#define rdev_info(rdev, fmt, ...) \
+ pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
+#define rdev_dbg(rdev, fmt, ...) \
+ pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)
static DEFINE_MUTEX(regulator_list_mutex);
static LIST_HEAD(regulator_list);
static LIST_HEAD(regulator_map_list);
-static int has_full_constraints;
+static bool has_full_constraints;
static bool board_wants_dummy_regulator;
+#ifdef CONFIG_DEBUG_FS
+static struct dentry *debugfs_root;
+#endif
+
/*
* struct regulator_map
*
static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
static void _notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data);
+static int _regulator_do_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV);
static const char *rdev_get_name(struct regulator_dev *rdev)
{
BUG_ON(*min_uV > *max_uV);
if (!rdev->constraints) {
- printk(KERN_ERR "%s: no constraints for %s\n", __func__,
- rdev_get_name(rdev));
+ rdev_err(rdev, "no constraints\n");
return -ENODEV;
}
if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
- printk(KERN_ERR "%s: operation not allowed for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "operation not allowed\n");
return -EPERM;
}
return 0;
}
+/* Make sure we select a voltage that suits the needs of all
+ * regulator consumers
+ */
+static int regulator_check_consumers(struct regulator_dev *rdev,
+ int *min_uV, int *max_uV)
+{
+ struct regulator *regulator;
+
+ list_for_each_entry(regulator, &rdev->consumer_list, list) {
+ if (*max_uV > regulator->max_uV)
+ *max_uV = regulator->max_uV;
+ if (*min_uV < regulator->min_uV)
+ *min_uV = regulator->min_uV;
+ }
+
+ if (*min_uV > *max_uV)
+ return -EINVAL;
+
+ return 0;
+}
+
/* current constraint check */
static int regulator_check_current_limit(struct regulator_dev *rdev,
int *min_uA, int *max_uA)
BUG_ON(*min_uA > *max_uA);
if (!rdev->constraints) {
- printk(KERN_ERR "%s: no constraints for %s\n", __func__,
- rdev_get_name(rdev));
+ rdev_err(rdev, "no constraints\n");
return -ENODEV;
}
if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) {
- printk(KERN_ERR "%s: operation not allowed for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "operation not allowed\n");
return -EPERM;
}
}
if (!rdev->constraints) {
- printk(KERN_ERR "%s: no constraints for %s\n", __func__,
- rdev_get_name(rdev));
+ rdev_err(rdev, "no constraints\n");
return -ENODEV;
}
if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) {
- printk(KERN_ERR "%s: operation not allowed for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "operation not allowed\n");
return -EPERM;
}
if (!(rdev->constraints->valid_modes_mask & mode)) {
- printk(KERN_ERR "%s: invalid mode %x for %s\n",
- __func__, mode, rdev_get_name(rdev));
+ rdev_err(rdev, "invalid mode %x\n", mode);
return -EINVAL;
}
return 0;
static int regulator_check_drms(struct regulator_dev *rdev)
{
if (!rdev->constraints) {
- printk(KERN_ERR "%s: no constraints for %s\n", __func__,
- rdev_get_name(rdev));
+ rdev_err(rdev, "no constraints\n");
return -ENODEV;
}
if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) {
- printk(KERN_ERR "%s: operation not allowed for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "operation not allowed\n");
return -EPERM;
}
return 0;
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 */
- output_uV = rdev->desc->ops->get_voltage(rdev);
+ output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0)
return;
/* get input voltage */
- if (rdev->supply && rdev->supply->desc->ops->get_voltage)
- input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply);
- else
+ input_uV = 0;
+ if (rdev->supply)
+ input_uV = _regulator_get_voltage(rdev);
+ if (input_uV <= 0)
input_uV = rdev->constraints->input_uV;
if (input_uV <= 0)
return;
*/
if (!rstate->enabled && !rstate->disabled) {
if (can_set_state)
- printk(KERN_WARNING "%s: No configuration for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_warn(rdev, "No configuration\n");
return 0;
}
if (rstate->enabled && rstate->disabled) {
- printk(KERN_ERR "%s: invalid configuration for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "invalid configuration\n");
return -EINVAL;
}
if (!can_set_state) {
- printk(KERN_ERR "%s: no way to set suspend state\n",
- __func__);
+ rdev_err(rdev, "no way to set suspend state\n");
return -EINVAL;
}
else
ret = rdev->desc->ops->set_suspend_disable(rdev);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to enabled/disable\n", __func__);
+ rdev_err(rdev, "failed to enabled/disable\n");
return ret;
}
if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) {
ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to set voltage\n",
- __func__);
+ rdev_err(rdev, "failed to set voltage\n");
return ret;
}
}
if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) {
ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to set mode\n", __func__);
+ rdev_err(rdev, "failed to set mode\n");
return ret;
}
}
if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY)
count += sprintf(buf + count, "standby");
- printk(KERN_INFO "regulator: %s: %s\n", rdev_get_name(rdev), buf);
+ rdev_info(rdev, "%s\n", buf);
}
static int machine_constraints_voltage(struct regulator_dev *rdev,
struct regulation_constraints *constraints)
{
struct regulator_ops *ops = rdev->desc->ops;
- const char *name = rdev_get_name(rdev);
int ret;
/* do we need to apply the constraint voltage */
if (rdev->constraints->apply_uV &&
- rdev->constraints->min_uV == rdev->constraints->max_uV &&
- ops->set_voltage) {
- ret = ops->set_voltage(rdev,
- rdev->constraints->min_uV, rdev->constraints->max_uV);
- if (ret < 0) {
- printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n",
- __func__,
- rdev->constraints->min_uV, name);
- rdev->constraints = NULL;
- return ret;
- }
+ rdev->constraints->min_uV == rdev->constraints->max_uV) {
+ ret = _regulator_do_set_voltage(rdev,
+ rdev->constraints->min_uV,
+ rdev->constraints->max_uV);
+ if (ret < 0) {
+ rdev_err(rdev, "failed to apply %duV constraint\n",
+ rdev->constraints->min_uV);
+ rdev->constraints = NULL;
+ return ret;
+ }
}
/* constrain machine-level voltage specs to fit
/* else require explicit machine-level constraints */
if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
- pr_err("%s: %s '%s' voltage constraints\n",
- __func__, "invalid", name);
+ rdev_err(rdev, "invalid voltage constraints\n");
return -EINVAL;
}
/* final: [min_uV..max_uV] valid iff constraints valid */
if (max_uV < min_uV) {
- pr_err("%s: %s '%s' voltage constraints\n",
- __func__, "unsupportable", name);
+ rdev_err(rdev, "unsupportable voltage constraints\n");
return -EINVAL;
}
/* use regulator's subset of machine constraints */
if (constraints->min_uV < min_uV) {
- pr_debug("%s: override '%s' %s, %d -> %d\n",
- __func__, name, "min_uV",
- constraints->min_uV, min_uV);
+ rdev_dbg(rdev, "override min_uV, %d -> %d\n",
+ constraints->min_uV, min_uV);
constraints->min_uV = min_uV;
}
if (constraints->max_uV > max_uV) {
- pr_debug("%s: override '%s' %s, %d -> %d\n",
- __func__, name, "max_uV",
- constraints->max_uV, max_uV);
+ rdev_dbg(rdev, "override max_uV, %d -> %d\n",
+ constraints->max_uV, max_uV);
constraints->max_uV = max_uV;
}
}
* set_mode.
*/
static int set_machine_constraints(struct regulator_dev *rdev,
- struct regulation_constraints *constraints)
+ const struct regulation_constraints *constraints)
{
int ret = 0;
- const char *name;
struct regulator_ops *ops = rdev->desc->ops;
- rdev->constraints = constraints;
-
- name = rdev_get_name(rdev);
+ rdev->constraints = kmemdup(constraints, sizeof(*constraints),
+ GFP_KERNEL);
+ if (!rdev->constraints)
+ return -ENOMEM;
- ret = machine_constraints_voltage(rdev, constraints);
+ ret = machine_constraints_voltage(rdev, rdev->constraints);
if (ret != 0)
goto out;
/* do we need to setup our suspend state */
if (constraints->initial_state) {
- ret = suspend_prepare(rdev, constraints->initial_state);
+ ret = suspend_prepare(rdev, rdev->constraints->initial_state);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to set suspend state for %s\n",
- __func__, name);
+ rdev_err(rdev, "failed to set suspend state\n");
rdev->constraints = NULL;
goto out;
}
if (constraints->initial_mode) {
if (!ops->set_mode) {
- printk(KERN_ERR "%s: no set_mode operation for %s\n",
- __func__, name);
+ rdev_err(rdev, "no set_mode operation\n");
ret = -EINVAL;
goto out;
}
- ret = ops->set_mode(rdev, constraints->initial_mode);
+ ret = ops->set_mode(rdev, rdev->constraints->initial_mode);
if (ret < 0) {
- printk(KERN_ERR
- "%s: failed to set initial mode for %s: %d\n",
- __func__, name, ret);
+ rdev_err(rdev, "failed to set initial mode: %d\n", ret);
goto out;
}
}
/* If the constraints say the regulator should be on at this point
* and we have control then make sure it is enabled.
*/
- if ((constraints->always_on || constraints->boot_on) && ops->enable) {
+ if ((rdev->constraints->always_on || rdev->constraints->boot_on) &&
+ ops->enable) {
ret = ops->enable(rdev);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to enable %s\n",
- __func__, name);
+ rdev_err(rdev, "failed to enable\n");
rdev->constraints = NULL;
goto out;
}
err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj,
"supply");
if (err) {
- printk(KERN_ERR
- "%s: could not add device link %s err %d\n",
- __func__, supply_rdev->dev.kobj.name, err);
+ rdev_err(rdev, "could not add device link %s err %d\n",
+ supply_rdev->dev.kobj.name, err);
goto out;
}
rdev->supply = supply_rdev;
continue;
dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n",
- dev_name(&node->regulator->dev),
- node->regulator->desc->name,
- supply,
- dev_name(&rdev->dev), rdev_get_name(rdev));
+ dev_name(&node->regulator->dev),
+ node->regulator->desc->name,
+ supply,
+ dev_name(&rdev->dev), rdev_get_name(rdev));
return -EBUSY;
}
regulator->dev_attr.show = device_requested_uA_show;
err = device_create_file(dev, ®ulator->dev_attr);
if (err < 0) {
- printk(KERN_WARNING "%s: could not add regulator_dev"
- " load sysfs\n", __func__);
+ rdev_warn(rdev, "could not add regulator_dev requested microamps sysfs entry\n");
goto attr_name_err;
}
err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj,
buf);
if (err) {
- printk(KERN_WARNING
- "%s: could not add device link %s err %d\n",
- __func__, dev->kobj.name, err);
+ rdev_warn(rdev, "could not add device link %s err %d\n",
+ dev->kobj.name, err);
goto link_name_err;
}
}
int ret;
if (id == NULL) {
- printk(KERN_ERR "regulator: get() with no identifier\n");
+ pr_err("get() with no identifier\n");
return regulator;
}
* substitute in a dummy regulator so consumers can continue.
*/
if (!has_full_constraints) {
- pr_warning("%s supply %s not found, using dummy regulator\n",
- devname, id);
+ pr_warn("%s supply %s not found, using dummy regulator\n",
+ devname, id);
rdev = dummy_regulator_rdev;
goto found;
}
ret = _regulator_enable(rdev->supply);
mutex_unlock(&rdev->supply->mutex);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to enable %s: %d\n",
- __func__, rdev_get_name(rdev), ret);
+ rdev_err(rdev, "failed to enable: %d\n", ret);
return ret;
}
}
if (ret >= 0) {
delay = ret;
} else {
- printk(KERN_WARNING
- "%s: enable_time() failed for %s: %d\n",
- __func__, rdev_get_name(rdev),
- ret);
+ rdev_warn(rdev, "enable_time() failed: %d\n",
+ ret);
delay = 0;
}
+ trace_regulator_enable(rdev_get_name(rdev));
+
/* Allow the regulator to ramp; it would be useful
* to extend this for bulk operations so that the
* regulators can ramp together. */
if (ret < 0)
return ret;
+ trace_regulator_enable_delay(rdev_get_name(rdev));
+
if (delay >= 1000) {
mdelay(delay / 1000);
udelay(delay % 1000);
udelay(delay);
}
+ trace_regulator_enable_complete(rdev_get_name(rdev));
+
} else if (ret < 0) {
- printk(KERN_ERR "%s: is_enabled() failed for %s: %d\n",
- __func__, rdev_get_name(rdev), ret);
+ rdev_err(rdev, "is_enabled() failed: %d\n", ret);
return ret;
}
/* Fallthrough on positive return values - already enabled */
*supply_rdev_ptr = NULL;
if (WARN(rdev->use_count <= 0,
- "unbalanced disables for %s\n",
- rdev_get_name(rdev)))
+ "unbalanced disables for %s\n", rdev_get_name(rdev)))
return -EIO;
/* are we the last user and permitted to disable ? */
/* we are last user */
if (_regulator_can_change_status(rdev) &&
rdev->desc->ops->disable) {
+ trace_regulator_disable(rdev_get_name(rdev));
+
ret = rdev->desc->ops->disable(rdev);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to disable %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "failed to disable\n");
return ret;
}
+ trace_regulator_disable_complete(rdev_get_name(rdev));
+
_notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
NULL);
}
/* ah well, who wants to live forever... */
ret = rdev->desc->ops->disable(rdev);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to force disable %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "failed to force disable\n");
return ret;
}
/* notify other consumers that power has been forced off */
return 0;
}
+static int _regulator_do_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ int ret;
+ unsigned int selector;
+
+ trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
+
+ 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,
+ selector);
+ else
+ selector = -1;
+ } else if (rdev->desc->ops->set_voltage_sel) {
+ int best_val = INT_MAX;
+ int i;
+
+ selector = 0;
+
+ /* Find the smallest voltage that falls within the specified
+ * range.
+ */
+ for (i = 0; i < rdev->desc->n_voltages; i++) {
+ ret = rdev->desc->ops->list_voltage(rdev, i);
+ if (ret < 0)
+ continue;
+
+ if (ret < best_val && ret >= min_uV && ret <= max_uV) {
+ best_val = ret;
+ selector = i;
+ }
+ }
+
+ if (best_val != INT_MAX) {
+ ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
+ selector = best_val;
+ } else {
+ ret = -EINVAL;
+ }
+ } else {
+ ret = -EINVAL;
+ }
+
+ if (ret == 0)
+ _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE,
+ NULL);
+
+ trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector);
+
+ return ret;
+}
+
/**
* regulator_set_voltage - set regulator output voltage
* @regulator: regulator source
int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
{
struct regulator_dev *rdev = regulator->rdev;
- int ret;
+ int ret = 0;
mutex_lock(&rdev->mutex);
+ /* If we're setting the same range as last time the change
+ * should be a noop (some cpufreq implementations use the same
+ * voltage for multiple frequencies, for example).
+ */
+ if (regulator->min_uV == min_uV && regulator->max_uV == max_uV)
+ goto out;
+
/* sanity check */
- if (!rdev->desc->ops->set_voltage) {
+ if (!rdev->desc->ops->set_voltage &&
+ !rdev->desc->ops->set_voltage_sel) {
ret = -EINVAL;
goto out;
}
goto out;
regulator->min_uV = min_uV;
regulator->max_uV = max_uV;
- ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV);
+
+ ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
+ if (ret < 0)
+ goto out;
+
+ ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
out:
- _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL);
mutex_unlock(&rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_set_voltage);
+/**
+ * regulator_sync_voltage - re-apply last regulator output voltage
+ * @regulator: regulator source
+ *
+ * Re-apply the last configured voltage. This is intended to be used
+ * where some external control source the consumer is cooperating with
+ * has caused the configured voltage to change.
+ */
+int regulator_sync_voltage(struct regulator *regulator)
+{
+ struct regulator_dev *rdev = regulator->rdev;
+ int ret, min_uV, max_uV;
+
+ mutex_lock(&rdev->mutex);
+
+ if (!rdev->desc->ops->set_voltage &&
+ !rdev->desc->ops->set_voltage_sel) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* This is only going to work if we've had a voltage configured. */
+ if (!regulator->min_uV && !regulator->max_uV) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ min_uV = regulator->min_uV;
+ max_uV = regulator->max_uV;
+
+ /* This should be a paranoia check... */
+ ret = regulator_check_voltage(rdev, &min_uV, &max_uV);
+ if (ret < 0)
+ goto out;
+
+ ret = regulator_check_consumers(rdev, &min_uV, &max_uV);
+ if (ret < 0)
+ goto out;
+
+ ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
+
+out:
+ mutex_unlock(&rdev->mutex);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regulator_sync_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
goto out;
/* get output voltage */
- output_uV = rdev->desc->ops->get_voltage(rdev);
+ output_uV = _regulator_get_voltage(rdev);
if (output_uV <= 0) {
- printk(KERN_ERR "%s: invalid output voltage found for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "invalid output voltage found\n");
goto out;
}
/* get input voltage */
- if (rdev->supply && rdev->supply->desc->ops->get_voltage)
- input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply);
- else
+ input_uV = 0;
+ if (rdev->supply)
+ input_uV = _regulator_get_voltage(rdev->supply);
+ if (input_uV <= 0)
input_uV = rdev->constraints->input_uV;
if (input_uV <= 0) {
- printk(KERN_ERR "%s: invalid input voltage found for %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "invalid input voltage found\n");
goto out;
}
total_uA_load);
ret = regulator_check_mode(rdev, mode);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to get optimum mode for %s @"
- " %d uA %d -> %d uV\n", __func__, rdev_get_name(rdev),
- total_uA_load, input_uV, output_uV);
+ rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n",
+ total_uA_load, input_uV, output_uV);
goto out;
}
ret = rdev->desc->ops->set_mode(rdev, mode);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n",
- __func__, mode, rdev_get_name(rdev));
+ rdev_err(rdev, "failed to set optimum mode %x\n", mode);
goto out;
}
ret = mode;
return 0;
err:
- printk(KERN_ERR "Failed to enable %s: %d\n", consumers[i].supply, ret);
+ pr_err("Failed to enable %s: %d\n", consumers[i].supply, ret);
for (--i; i >= 0; --i)
regulator_disable(consumers[i].consumer);
return 0;
err:
- printk(KERN_ERR "Failed to disable %s: %d\n", consumers[i].supply,
- ret);
+ pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret);
for (--i; i >= 0; --i)
regulator_enable(consumers[i].consumer);
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;
return status;
/* constraints need specific supporting methods */
- if (ops->set_voltage) {
+ if (ops->set_voltage || ops->set_voltage_sel) {
status = device_create_file(dev, &dev_attr_min_microvolts);
if (status < 0)
return status;
return status;
}
+static void rdev_init_debugfs(struct regulator_dev *rdev)
+{
+#ifdef CONFIG_DEBUG_FS
+ rdev->debugfs = debugfs_create_dir(rdev_get_name(rdev), debugfs_root);
+ if (IS_ERR(rdev->debugfs) || !rdev->debugfs) {
+ rdev_warn(rdev, "Failed to create debugfs directory\n");
+ rdev->debugfs = NULL;
+ return;
+ }
+
+ debugfs_create_u32("use_count", 0444, rdev->debugfs,
+ &rdev->use_count);
+ debugfs_create_u32("open_count", 0444, rdev->debugfs,
+ &rdev->open_count);
+#endif
+}
+
/**
* regulator_register - register regulator
* @regulator_desc: regulator to register
* Returns 0 on success.
*/
struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
- struct device *dev, struct regulator_init_data *init_data,
+ struct device *dev, const struct regulator_init_data *init_data,
void *driver_data)
{
static atomic_t regulator_no = ATOMIC_INIT(0);
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);
+ WARN_ON(regulator_desc->ops->set_voltage &&
+ regulator_desc->ops->set_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);
+ }
+ if (regulator_desc->ops->set_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);
}
list_add(&rdev->list, ®ulator_list);
+
+ rdev_init_debugfs(rdev);
out:
mutex_unlock(®ulator_list_mutex);
return rdev;
return;
mutex_lock(®ulator_list_mutex);
+#ifdef CONFIG_DEBUG_FS
+ debugfs_remove_recursive(rdev->debugfs);
+#endif
WARN_ON(rdev->open_count);
unset_regulator_supplies(rdev);
list_del(&rdev->list);
if (rdev->supply)
sysfs_remove_link(&rdev->dev.kobj, "supply");
device_unregister(&rdev->dev);
+ kfree(rdev->constraints);
mutex_unlock(®ulator_list_mutex);
}
EXPORT_SYMBOL_GPL(regulator_unregister);
mutex_unlock(&rdev->mutex);
if (ret < 0) {
- printk(KERN_ERR "%s: failed to prepare %s\n",
- __func__, rdev_get_name(rdev));
+ rdev_err(rdev, "failed to prepare\n");
goto out;
}
}
{
int ret;
- printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION);
-
ret = class_register(®ulator_class);
+#ifdef CONFIG_DEBUG_FS
+ debugfs_root = debugfs_create_dir("regulator", NULL);
+ if (IS_ERR(debugfs_root) || !debugfs_root) {
+ pr_warn("regulator: Failed to create debugfs directory\n");
+ debugfs_root = NULL;
+ }
+#endif
+
regulator_dummy_init();
return ret;
struct regulator_ops *ops;
struct regulation_constraints *c;
int enabled, ret;
- const char *name;
mutex_lock(®ulator_list_mutex);
ops = rdev->desc->ops;
c = rdev->constraints;
- name = rdev_get_name(rdev);
-
if (!ops->disable || (c && c->always_on))
continue;
if (has_full_constraints) {
/* We log since this may kill the system if it
* goes wrong. */
- printk(KERN_INFO "%s: disabling %s\n",
- __func__, name);
+ rdev_info(rdev, "disabling\n");
ret = ops->disable(rdev);
if (ret != 0) {
- printk(KERN_ERR
- "%s: couldn't disable %s: %d\n",
- __func__, name, ret);
+ rdev_err(rdev, "couldn't disable: %d\n", ret);
}
} else {
/* The intention is that in future we will
* so warn even if we aren't going to do
* anything here.
*/
- printk(KERN_WARNING
- "%s: incomplete constraints, leaving %s on\n",
- __func__, name);
+ rdev_warn(rdev, "incomplete constraints, leaving on\n");
}
unlock:
projects / mv-sheeva.git / blobdiff