diff options
author | Sebastian Reichel <sre@kernel.org> | 2016-06-17 13:54:32 +0200 |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2016-08-11 01:11:03 +0200 |
commit | 8c0984e5a75337df513047ec92a6c09d78e3e5cd (patch) | |
tree | a2fc0a0dd7c7c40d9379bdd1c2b279c0959d0e1f /drivers/power/power_supply_core.c | |
parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) |
power: move power supply drivers to power/supply
This moves all power supply drivers from drivers/power/
to drivers/power/supply/. The intention is a cleaner
source tree, since drivers/power/ also contains frameworks
unrelated to power supply, like adaptive voltage scaling.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power/power_supply_core.c')
-rw-r--r-- | drivers/power/power_supply_core.c | 989 |
1 files changed, 0 insertions, 989 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c deleted file mode 100644 index a74d8ca383a1..000000000000 --- a/drivers/power/power_supply_core.c +++ /dev/null @@ -1,989 +0,0 @@ -/* - * Universal power supply monitor class - * - * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> - * Copyright © 2004 Szabolcs Gyurko - * Copyright © 2003 Ian Molton <spyro@f2s.com> - * - * Modified: 2004, Oct Szabolcs Gyurko - * - * You may use this code as per GPL version 2 - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/notifier.h> -#include <linux/err.h> -#include <linux/power_supply.h> -#include <linux/thermal.h> -#include "power_supply.h" - -/* exported for the APM Power driver, APM emulation */ -struct class *power_supply_class; -EXPORT_SYMBOL_GPL(power_supply_class); - -ATOMIC_NOTIFIER_HEAD(power_supply_notifier); -EXPORT_SYMBOL_GPL(power_supply_notifier); - -static struct device_type power_supply_dev_type; - -#define POWER_SUPPLY_DEFERRED_REGISTER_TIME msecs_to_jiffies(10) - -static bool __power_supply_is_supplied_by(struct power_supply *supplier, - struct power_supply *supply) -{ - int i; - - if (!supply->supplied_from && !supplier->supplied_to) - return false; - - /* Support both supplied_to and supplied_from modes */ - if (supply->supplied_from) { - if (!supplier->desc->name) - return false; - for (i = 0; i < supply->num_supplies; i++) - if (!strcmp(supplier->desc->name, supply->supplied_from[i])) - return true; - } else { - if (!supply->desc->name) - return false; - for (i = 0; i < supplier->num_supplicants; i++) - if (!strcmp(supplier->supplied_to[i], supply->desc->name)) - return true; - } - - return false; -} - -static int __power_supply_changed_work(struct device *dev, void *data) -{ - struct power_supply *psy = data; - struct power_supply *pst = dev_get_drvdata(dev); - - if (__power_supply_is_supplied_by(psy, pst)) { - if (pst->desc->external_power_changed) - pst->desc->external_power_changed(pst); - } - - return 0; -} - -static void power_supply_changed_work(struct work_struct *work) -{ - unsigned long flags; - struct power_supply *psy = container_of(work, struct power_supply, - changed_work); - - dev_dbg(&psy->dev, "%s\n", __func__); - - spin_lock_irqsave(&psy->changed_lock, flags); - /* - * Check 'changed' here to avoid issues due to race between - * power_supply_changed() and this routine. In worst case - * power_supply_changed() can be called again just before we take above - * lock. During the first call of this routine we will mark 'changed' as - * false and it will stay false for the next call as well. - */ - if (likely(psy->changed)) { - psy->changed = false; - spin_unlock_irqrestore(&psy->changed_lock, flags); - class_for_each_device(power_supply_class, NULL, psy, - __power_supply_changed_work); - power_supply_update_leds(psy); - atomic_notifier_call_chain(&power_supply_notifier, - PSY_EVENT_PROP_CHANGED, psy); - kobject_uevent(&psy->dev.kobj, KOBJ_CHANGE); - spin_lock_irqsave(&psy->changed_lock, flags); - } - - /* - * Hold the wakeup_source until all events are processed. - * power_supply_changed() might have called again and have set 'changed' - * to true. - */ - if (likely(!psy->changed)) - pm_relax(&psy->dev); - spin_unlock_irqrestore(&psy->changed_lock, flags); -} - -void power_supply_changed(struct power_supply *psy) -{ - unsigned long flags; - - dev_dbg(&psy->dev, "%s\n", __func__); - - spin_lock_irqsave(&psy->changed_lock, flags); - psy->changed = true; - pm_stay_awake(&psy->dev); - spin_unlock_irqrestore(&psy->changed_lock, flags); - schedule_work(&psy->changed_work); -} -EXPORT_SYMBOL_GPL(power_supply_changed); - -/* - * Notify that power supply was registered after parent finished the probing. - * - * Often power supply is registered from driver's probe function. However - * calling power_supply_changed() directly from power_supply_register() - * would lead to execution of get_property() function provided by the driver - * too early - before the probe ends. - * - * Avoid that by waiting on parent's mutex. - */ -static void power_supply_deferred_register_work(struct work_struct *work) -{ - struct power_supply *psy = container_of(work, struct power_supply, - deferred_register_work.work); - - if (psy->dev.parent) - mutex_lock(&psy->dev.parent->mutex); - - power_supply_changed(psy); - - if (psy->dev.parent) - mutex_unlock(&psy->dev.parent->mutex); -} - -#ifdef CONFIG_OF -#include <linux/of.h> - -static int __power_supply_populate_supplied_from(struct device *dev, - void *data) -{ - struct power_supply *psy = data; - struct power_supply *epsy = dev_get_drvdata(dev); - struct device_node *np; - int i = 0; - - do { - np = of_parse_phandle(psy->of_node, "power-supplies", i++); - if (!np) - break; - - if (np == epsy->of_node) { - dev_info(&psy->dev, "%s: Found supply : %s\n", - psy->desc->name, epsy->desc->name); - psy->supplied_from[i-1] = (char *)epsy->desc->name; - psy->num_supplies++; - of_node_put(np); - break; - } - of_node_put(np); - } while (np); - - return 0; -} - -static int power_supply_populate_supplied_from(struct power_supply *psy) -{ - int error; - - error = class_for_each_device(power_supply_class, NULL, psy, - __power_supply_populate_supplied_from); - - dev_dbg(&psy->dev, "%s %d\n", __func__, error); - - return error; -} - -static int __power_supply_find_supply_from_node(struct device *dev, - void *data) -{ - struct device_node *np = data; - struct power_supply *epsy = dev_get_drvdata(dev); - - /* returning non-zero breaks out of class_for_each_device loop */ - if (epsy->of_node == np) - return 1; - - return 0; -} - -static int power_supply_find_supply_from_node(struct device_node *supply_node) -{ - int error; - - /* - * class_for_each_device() either returns its own errors or values - * returned by __power_supply_find_supply_from_node(). - * - * __power_supply_find_supply_from_node() will return 0 (no match) - * or 1 (match). - * - * We return 0 if class_for_each_device() returned 1, -EPROBE_DEFER if - * it returned 0, or error as returned by it. - */ - error = class_for_each_device(power_supply_class, NULL, supply_node, - __power_supply_find_supply_from_node); - - return error ? (error == 1 ? 0 : error) : -EPROBE_DEFER; -} - -static int power_supply_check_supplies(struct power_supply *psy) -{ - struct device_node *np; - int cnt = 0; - - /* If there is already a list honor it */ - if (psy->supplied_from && psy->num_supplies > 0) - return 0; - - /* No device node found, nothing to do */ - if (!psy->of_node) - return 0; - - do { - int ret; - - np = of_parse_phandle(psy->of_node, "power-supplies", cnt++); - if (!np) - break; - - ret = power_supply_find_supply_from_node(np); - of_node_put(np); - - if (ret) { - dev_dbg(&psy->dev, "Failed to find supply!\n"); - return ret; - } - } while (np); - - /* Missing valid "power-supplies" entries */ - if (cnt == 1) - return 0; - - /* All supplies found, allocate char ** array for filling */ - psy->supplied_from = devm_kzalloc(&psy->dev, sizeof(psy->supplied_from), - GFP_KERNEL); - if (!psy->supplied_from) { - dev_err(&psy->dev, "Couldn't allocate memory for supply list\n"); - return -ENOMEM; - } - - *psy->supplied_from = devm_kzalloc(&psy->dev, - sizeof(char *) * (cnt - 1), - GFP_KERNEL); - if (!*psy->supplied_from) { - dev_err(&psy->dev, "Couldn't allocate memory for supply list\n"); - return -ENOMEM; - } - - return power_supply_populate_supplied_from(psy); -} -#else -static inline int power_supply_check_supplies(struct power_supply *psy) -{ - return 0; -} -#endif - -static int __power_supply_am_i_supplied(struct device *dev, void *data) -{ - union power_supply_propval ret = {0,}; - struct power_supply *psy = data; - struct power_supply *epsy = dev_get_drvdata(dev); - - if (__power_supply_is_supplied_by(epsy, psy)) - if (!epsy->desc->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, - &ret)) - return ret.intval; - - return 0; -} - -int power_supply_am_i_supplied(struct power_supply *psy) -{ - int error; - - error = class_for_each_device(power_supply_class, NULL, psy, - __power_supply_am_i_supplied); - - dev_dbg(&psy->dev, "%s %d\n", __func__, error); - - return error; -} -EXPORT_SYMBOL_GPL(power_supply_am_i_supplied); - -static int __power_supply_is_system_supplied(struct device *dev, void *data) -{ - union power_supply_propval ret = {0,}; - struct power_supply *psy = dev_get_drvdata(dev); - unsigned int *count = data; - - (*count)++; - if (psy->desc->type != POWER_SUPPLY_TYPE_BATTERY) - if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE, - &ret)) - return ret.intval; - - return 0; -} - -int power_supply_is_system_supplied(void) -{ - int error; - unsigned int count = 0; - - error = class_for_each_device(power_supply_class, NULL, &count, - __power_supply_is_system_supplied); - - /* - * If no power class device was found at all, most probably we are - * running on a desktop system, so assume we are on mains power. - */ - if (count == 0) - return 1; - - return error; -} -EXPORT_SYMBOL_GPL(power_supply_is_system_supplied); - -int power_supply_set_battery_charged(struct power_supply *psy) -{ - if (atomic_read(&psy->use_cnt) >= 0 && - psy->desc->type == POWER_SUPPLY_TYPE_BATTERY && - psy->desc->set_charged) { - psy->desc->set_charged(psy); - return 0; - } - - return -EINVAL; -} -EXPORT_SYMBOL_GPL(power_supply_set_battery_charged); - -static int power_supply_match_device_by_name(struct device *dev, const void *data) -{ - const char *name = data; - struct power_supply *psy = dev_get_drvdata(dev); - - return strcmp(psy->desc->name, name) == 0; -} - -/** - * power_supply_get_by_name() - Search for a power supply and returns its ref - * @name: Power supply name to fetch - * - * If power supply was found, it increases reference count for the - * internal power supply's device. The user should power_supply_put() - * after usage. - * - * Return: On success returns a reference to a power supply with - * matching name equals to @name, a NULL otherwise. - */ -struct power_supply *power_supply_get_by_name(const char *name) -{ - struct power_supply *psy = NULL; - struct device *dev = class_find_device(power_supply_class, NULL, name, - power_supply_match_device_by_name); - - if (dev) { - psy = dev_get_drvdata(dev); - atomic_inc(&psy->use_cnt); - } - - return psy; -} -EXPORT_SYMBOL_GPL(power_supply_get_by_name); - -/** - * power_supply_put() - Drop reference obtained with power_supply_get_by_name - * @psy: Reference to put - * - * The reference to power supply should be put before unregistering - * the power supply. - */ -void power_supply_put(struct power_supply *psy) -{ - might_sleep(); - - atomic_dec(&psy->use_cnt); - put_device(&psy->dev); -} -EXPORT_SYMBOL_GPL(power_supply_put); - -#ifdef CONFIG_OF -static int power_supply_match_device_node(struct device *dev, const void *data) -{ - return dev->parent && dev->parent->of_node == data; -} - -/** - * power_supply_get_by_phandle() - Search for a power supply and returns its ref - * @np: Pointer to device node holding phandle property - * @phandle_name: Name of property holding a power supply name - * - * If power supply was found, it increases reference count for the - * internal power supply's device. The user should power_supply_put() - * after usage. - * - * Return: On success returns a reference to a power supply with - * matching name equals to value under @property, NULL or ERR_PTR otherwise. - */ -struct power_supply *power_supply_get_by_phandle(struct device_node *np, - const char *property) -{ - struct device_node *power_supply_np; - struct power_supply *psy = NULL; - struct device *dev; - - power_supply_np = of_parse_phandle(np, property, 0); - if (!power_supply_np) - return ERR_PTR(-ENODEV); - - dev = class_find_device(power_supply_class, NULL, power_supply_np, - power_supply_match_device_node); - - of_node_put(power_supply_np); - - if (dev) { - psy = dev_get_drvdata(dev); - atomic_inc(&psy->use_cnt); - } - - return psy; -} -EXPORT_SYMBOL_GPL(power_supply_get_by_phandle); - -static void devm_power_supply_put(struct device *dev, void *res) -{ - struct power_supply **psy = res; - - power_supply_put(*psy); -} - -/** - * devm_power_supply_get_by_phandle() - Resource managed version of - * power_supply_get_by_phandle() - * @dev: Pointer to device holding phandle property - * @phandle_name: Name of property holding a power supply phandle - * - * Return: On success returns a reference to a power supply with - * matching name equals to value under @property, NULL or ERR_PTR otherwise. - */ -struct power_supply *devm_power_supply_get_by_phandle(struct device *dev, - const char *property) -{ - struct power_supply **ptr, *psy; - - if (!dev->of_node) - return ERR_PTR(-ENODEV); - - ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return ERR_PTR(-ENOMEM); - - psy = power_supply_get_by_phandle(dev->of_node, property); - if (IS_ERR_OR_NULL(psy)) { - devres_free(ptr); - } else { - *ptr = psy; - devres_add(dev, ptr); - } - return psy; -} -EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle); -#endif /* CONFIG_OF */ - -int power_supply_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - if (atomic_read(&psy->use_cnt) <= 0) { - if (!psy->initialized) - return -EAGAIN; - return -ENODEV; - } - - return psy->desc->get_property(psy, psp, val); -} -EXPORT_SYMBOL_GPL(power_supply_get_property); - -int power_supply_set_property(struct power_supply *psy, - enum power_supply_property psp, - const union power_supply_propval *val) -{ - if (atomic_read(&psy->use_cnt) <= 0 || !psy->desc->set_property) - return -ENODEV; - - return psy->desc->set_property(psy, psp, val); -} -EXPORT_SYMBOL_GPL(power_supply_set_property); - -int power_supply_property_is_writeable(struct power_supply *psy, - enum power_supply_property psp) -{ - if (atomic_read(&psy->use_cnt) <= 0 || - !psy->desc->property_is_writeable) - return -ENODEV; - - return psy->desc->property_is_writeable(psy, psp); -} -EXPORT_SYMBOL_GPL(power_supply_property_is_writeable); - -void power_supply_external_power_changed(struct power_supply *psy) -{ - if (atomic_read(&psy->use_cnt) <= 0 || - !psy->desc->external_power_changed) - return; - - psy->desc->external_power_changed(psy); -} -EXPORT_SYMBOL_GPL(power_supply_external_power_changed); - -int power_supply_powers(struct power_supply *psy, struct device *dev) -{ - return sysfs_create_link(&psy->dev.kobj, &dev->kobj, "powers"); -} -EXPORT_SYMBOL_GPL(power_supply_powers); - -static void power_supply_dev_release(struct device *dev) -{ - struct power_supply *psy = container_of(dev, struct power_supply, dev); - pr_debug("device: '%s': %s\n", dev_name(dev), __func__); - kfree(psy); -} - -int power_supply_reg_notifier(struct notifier_block *nb) -{ - return atomic_notifier_chain_register(&power_supply_notifier, nb); -} -EXPORT_SYMBOL_GPL(power_supply_reg_notifier); - -void power_supply_unreg_notifier(struct notifier_block *nb) -{ - atomic_notifier_chain_unregister(&power_supply_notifier, nb); -} -EXPORT_SYMBOL_GPL(power_supply_unreg_notifier); - -#ifdef CONFIG_THERMAL -static int power_supply_read_temp(struct thermal_zone_device *tzd, - int *temp) -{ - struct power_supply *psy; - union power_supply_propval val; - int ret; - - WARN_ON(tzd == NULL); - psy = tzd->devdata; - ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &val); - if (ret) - return ret; - - /* Convert tenths of degree Celsius to milli degree Celsius. */ - *temp = val.intval * 100; - - return ret; -} - -static struct thermal_zone_device_ops psy_tzd_ops = { - .get_temp = power_supply_read_temp, -}; - -static int psy_register_thermal(struct power_supply *psy) -{ - int i; - - if (psy->desc->no_thermal) - return 0; - - /* Register battery zone device psy reports temperature */ - for (i = 0; i < psy->desc->num_properties; i++) { - if (psy->desc->properties[i] == POWER_SUPPLY_PROP_TEMP) { - psy->tzd = thermal_zone_device_register(psy->desc->name, - 0, 0, psy, &psy_tzd_ops, NULL, 0, 0); - return PTR_ERR_OR_ZERO(psy->tzd); - } - } - return 0; -} - -static void psy_unregister_thermal(struct power_supply *psy) -{ - if (IS_ERR_OR_NULL(psy->tzd)) - return; - thermal_zone_device_unregister(psy->tzd); -} - -/* thermal cooling device callbacks */ -static int ps_get_max_charge_cntl_limit(struct thermal_cooling_device *tcd, - unsigned long *state) -{ - struct power_supply *psy; - union power_supply_propval val; - int ret; - - psy = tcd->devdata; - ret = power_supply_get_property(psy, - POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, &val); - if (ret) - return ret; - - *state = val.intval; - - return ret; -} - -static int ps_get_cur_chrage_cntl_limit(struct thermal_cooling_device *tcd, - unsigned long *state) -{ - struct power_supply *psy; - union power_supply_propval val; - int ret; - - psy = tcd->devdata; - ret = power_supply_get_property(psy, - POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val); - if (ret) - return ret; - - *state = val.intval; - - return ret; -} - -static int ps_set_cur_charge_cntl_limit(struct thermal_cooling_device *tcd, - unsigned long state) -{ - struct power_supply *psy; - union power_supply_propval val; - int ret; - - psy = tcd->devdata; - val.intval = state; - ret = psy->desc->set_property(psy, - POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val); - - return ret; -} - -static struct thermal_cooling_device_ops psy_tcd_ops = { - .get_max_state = ps_get_max_charge_cntl_limit, - .get_cur_state = ps_get_cur_chrage_cntl_limit, - .set_cur_state = ps_set_cur_charge_cntl_limit, -}; - -static int psy_register_cooler(struct power_supply *psy) -{ - int i; - - /* Register for cooling device if psy can control charging */ - for (i = 0; i < psy->desc->num_properties; i++) { - if (psy->desc->properties[i] == - POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) { - psy->tcd = thermal_cooling_device_register( - (char *)psy->desc->name, - psy, &psy_tcd_ops); - return PTR_ERR_OR_ZERO(psy->tcd); - } - } - return 0; -} - -static void psy_unregister_cooler(struct power_supply *psy) -{ - if (IS_ERR_OR_NULL(psy->tcd)) - return; - thermal_cooling_device_unregister(psy->tcd); -} -#else -static int psy_register_thermal(struct power_supply *psy) -{ - return 0; -} - -static void psy_unregister_thermal(struct power_supply *psy) -{ -} - -static int psy_register_cooler(struct power_supply *psy) -{ - return 0; -} - -static void psy_unregister_cooler(struct power_supply *psy) -{ -} -#endif - -static struct power_supply *__must_check -__power_supply_register(struct device *parent, - const struct power_supply_desc *desc, - const struct power_supply_config *cfg, - bool ws) -{ - struct device *dev; - struct power_supply *psy; - int rc; - - if (!parent) - pr_warn("%s: Expected proper parent device for '%s'\n", - __func__, desc->name); - - psy = kzalloc(sizeof(*psy), GFP_KERNEL); - if (!psy) - return ERR_PTR(-ENOMEM); - - dev = &psy->dev; - - device_initialize(dev); - - dev->class = power_supply_class; - dev->type = &power_supply_dev_type; - dev->parent = parent; - dev->release = power_supply_dev_release; - dev_set_drvdata(dev, psy); - psy->desc = desc; - if (cfg) { - psy->drv_data = cfg->drv_data; - psy->of_node = cfg->of_node; - psy->supplied_to = cfg->supplied_to; - psy->num_supplicants = cfg->num_supplicants; - } - - rc = dev_set_name(dev, "%s", desc->name); - if (rc) - goto dev_set_name_failed; - - INIT_WORK(&psy->changed_work, power_supply_changed_work); - INIT_DELAYED_WORK(&psy->deferred_register_work, - power_supply_deferred_register_work); - - rc = power_supply_check_supplies(psy); - if (rc) { - dev_info(dev, "Not all required supplies found, defer probe\n"); - goto check_supplies_failed; - } - - spin_lock_init(&psy->changed_lock); - rc = device_init_wakeup(dev, ws); - if (rc) - goto wakeup_init_failed; - - rc = device_add(dev); - if (rc) - goto device_add_failed; - - rc = psy_register_thermal(psy); - if (rc) - goto register_thermal_failed; - - rc = psy_register_cooler(psy); - if (rc) - goto register_cooler_failed; - - rc = power_supply_create_triggers(psy); - if (rc) - goto create_triggers_failed; - - /* - * Update use_cnt after any uevents (most notably from device_add()). - * We are here still during driver's probe but - * the power_supply_uevent() calls back driver's get_property - * method so: - * 1. Driver did not assigned the returned struct power_supply, - * 2. Driver could not finish initialization (anything in its probe - * after calling power_supply_register()). - */ - atomic_inc(&psy->use_cnt); - psy->initialized = true; - - queue_delayed_work(system_power_efficient_wq, - &psy->deferred_register_work, - POWER_SUPPLY_DEFERRED_REGISTER_TIME); - - return psy; - -create_triggers_failed: - psy_unregister_cooler(psy); -register_cooler_failed: - psy_unregister_thermal(psy); -register_thermal_failed: - device_del(dev); -device_add_failed: -wakeup_init_failed: -check_supplies_failed: -dev_set_name_failed: - put_device(dev); - return ERR_PTR(rc); -} - -/** - * power_supply_register() - Register new power supply - * @parent: Device to be a parent of power supply's device, usually - * the device which probe function calls this - * @desc: Description of power supply, must be valid through whole - * lifetime of this power supply - * @cfg: Run-time specific configuration accessed during registering, - * may be NULL - * - * Return: A pointer to newly allocated power_supply on success - * or ERR_PTR otherwise. - * Use power_supply_unregister() on returned power_supply pointer to release - * resources. - */ -struct power_supply *__must_check power_supply_register(struct device *parent, - const struct power_supply_desc *desc, - const struct power_supply_config *cfg) -{ - return __power_supply_register(parent, desc, cfg, true); -} -EXPORT_SYMBOL_GPL(power_supply_register); - -/** - * power_supply_register_no_ws() - Register new non-waking-source power supply - * @parent: Device to be a parent of power supply's device, usually - * the device which probe function calls this - * @desc: Description of power supply, must be valid through whole - * lifetime of this power supply - * @cfg: Run-time specific configuration accessed during registering, - * may be NULL - * - * Return: A pointer to newly allocated power_supply on success - * or ERR_PTR otherwise. - * Use power_supply_unregister() on returned power_supply pointer to release - * resources. - */ -struct power_supply *__must_check -power_supply_register_no_ws(struct device *parent, - const struct power_supply_desc *desc, - const struct power_supply_config *cfg) -{ - return __power_supply_register(parent, desc, cfg, false); -} -EXPORT_SYMBOL_GPL(power_supply_register_no_ws); - -static void devm_power_supply_release(struct device *dev, void *res) -{ - struct power_supply **psy = res; - - power_supply_unregister(*psy); -} - -/** - * devm_power_supply_register() - Register managed power supply - * @parent: Device to be a parent of power supply's device, usually - * the device which probe function calls this - * @desc: Description of power supply, must be valid through whole - * lifetime of this power supply - * @cfg: Run-time specific configuration accessed during registering, - * may be NULL - * - * Return: A pointer to newly allocated power_supply on success - * or ERR_PTR otherwise. - * The returned power_supply pointer will be automatically unregistered - * on driver detach. - */ -struct power_supply *__must_check -devm_power_supply_register(struct device *parent, - const struct power_supply_desc *desc, - const struct power_supply_config *cfg) -{ - struct power_supply **ptr, *psy; - - ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL); - - if (!ptr) - return ERR_PTR(-ENOMEM); - psy = __power_supply_register(parent, desc, cfg, true); - if (IS_ERR(psy)) { - devres_free(ptr); - } else { - *ptr = psy; - devres_add(parent, ptr); - } - return psy; -} -EXPORT_SYMBOL_GPL(devm_power_supply_register); - -/** - * devm_power_supply_register_no_ws() - Register managed non-waking-source power supply - * @parent: Device to be a parent of power supply's device, usually - * the device which probe function calls this - * @desc: Description of power supply, must be valid through whole - * lifetime of this power supply - * @cfg: Run-time specific configuration accessed during registering, - * may be NULL - * - * Return: A pointer to newly allocated power_supply on success - * or ERR_PTR otherwise. - * The returned power_supply pointer will be automatically unregistered - * on driver detach. - */ -struct power_supply *__must_check -devm_power_supply_register_no_ws(struct device *parent, - const struct power_supply_desc *desc, - const struct power_supply_config *cfg) -{ - struct power_supply **ptr, *psy; - - ptr = devres_alloc(devm_power_supply_release, sizeof(*ptr), GFP_KERNEL); - - if (!ptr) - return ERR_PTR(-ENOMEM); - psy = __power_supply_register(parent, desc, cfg, false); - if (IS_ERR(psy)) { - devres_free(ptr); - } else { - *ptr = psy; - devres_add(parent, ptr); - } - return psy; -} -EXPORT_SYMBOL_GPL(devm_power_supply_register_no_ws); - -/** - * power_supply_unregister() - Remove this power supply from system - * @psy: Pointer to power supply to unregister - * - * Remove this power supply from the system. The resources of power supply - * will be freed here or on last power_supply_put() call. - */ -void power_supply_unregister(struct power_supply *psy) -{ - WARN_ON(atomic_dec_return(&psy->use_cnt)); - cancel_work_sync(&psy->changed_work); - cancel_delayed_work_sync(&psy->deferred_register_work); - sysfs_remove_link(&psy->dev.kobj, "powers"); - power_supply_remove_triggers(psy); - psy_unregister_cooler(psy); - psy_unregister_thermal(psy); - device_init_wakeup(&psy->dev, false); - device_unregister(&psy->dev); -} -EXPORT_SYMBOL_GPL(power_supply_unregister); - -void *power_supply_get_drvdata(struct power_supply *psy) -{ - return psy->drv_data; -} -EXPORT_SYMBOL_GPL(power_supply_get_drvdata); - -static int __init power_supply_class_init(void) -{ - power_supply_class = class_create(THIS_MODULE, "power_supply"); - - if (IS_ERR(power_supply_class)) - return PTR_ERR(power_supply_class); - - power_supply_class->dev_uevent = power_supply_uevent; - power_supply_init_attrs(&power_supply_dev_type); - - return 0; -} - -static void __exit power_supply_class_exit(void) -{ - class_destroy(power_supply_class); -} - -subsys_initcall(power_supply_class_init); -module_exit(power_supply_class_exit); - -MODULE_DESCRIPTION("Universal power supply monitor class"); -MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, " - "Szabolcs Gyurko, " - "Anton Vorontsov <cbou@mail.ru>"); -MODULE_LICENSE("GPL"); |