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path: root/drivers/power/power_supply_core.c
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Diffstat (limited to 'drivers/power/power_supply_core.c')
-rw-r--r--drivers/power/power_supply_core.c578
1 files changed, 0 insertions, 578 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
deleted file mode 100644
index 3b2d5df45e7a..000000000000
--- a/drivers/power/power_supply_core.c
+++ /dev/null
@@ -1,578 +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/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);
-
-static struct device_type power_supply_dev_type;
-
-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->name)
- return false;
- for (i = 0; i < supply->num_supplies; i++)
- if (!strcmp(supplier->name, supply->supplied_from[i]))
- return true;
- } else {
- if (!supply->name)
- return false;
- for (i = 0; i < supplier->num_supplicants; i++)
- if (!strcmp(supplier->supplied_to[i], supply->name))
- return true;
- }
-
- return false;
-}
-
-static int __power_supply_changed_work(struct device *dev, void *data)
-{
- struct power_supply *psy = (struct power_supply *)data;
- struct power_supply *pst = dev_get_drvdata(dev);
-
- if (__power_supply_is_supplied_by(psy, pst)) {
- if (pst->external_power_changed)
- pst->external_power_changed(pst);
- }
-
- return 0;
-}
-
-static void power_supply_changed_work(struct work_struct *work)
-{
- struct power_supply *psy = container_of(work, struct power_supply,
- changed_work);
-
- dev_dbg(psy->dev, "%s\n", __func__);
-
- class_for_each_device(power_supply_class, NULL, psy,
- __power_supply_changed_work);
-
- power_supply_update_leds(psy);
-
- kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
-}
-
-void power_supply_changed(struct power_supply *psy)
-{
- dev_dbg(psy->dev, "%s\n", __func__);
-
- schedule_work(&psy->changed_work);
-}
-EXPORT_SYMBOL_GPL(power_supply_changed);
-
-#ifdef CONFIG_OF
-#include <linux/of.h>
-
-static int __power_supply_populate_supplied_from(struct device *dev,
- void *data)
-{
- struct power_supply *psy = (struct power_supply *)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)
- continue;
-
- if (np == epsy->of_node) {
- dev_info(psy->dev, "%s: Found supply : %s\n",
- psy->name, epsy->name);
- psy->supplied_from[i-1] = (char *)epsy->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 = (struct device_node *)data;
- struct power_supply *epsy = dev_get_drvdata(dev);
-
- /* return error breaks out of class_for_each_device loop */
- if (epsy->of_node == np)
- return -EINVAL;
-
- return 0;
-}
-
-static int power_supply_find_supply_from_node(struct device_node *supply_node)
-{
- int error;
- struct device *dev;
- struct class_dev_iter iter;
-
- /*
- * Use iterator to see if any other device is registered.
- * This is required since class_for_each_device returns 0
- * if there are no devices registered.
- */
- class_dev_iter_init(&iter, power_supply_class, NULL, NULL);
- dev = class_dev_iter_next(&iter);
-
- if (!dev)
- return -EPROBE_DEFER;
-
- /*
- * We have to treat the return value as inverted, because if
- * we return error on not found, then it won't continue looking.
- * So we trick it by returning error on success to stop looking
- * once the matching device is found.
- */
- error = class_for_each_device(power_supply_class, NULL, supply_node,
- __power_supply_find_supply_from_node);
-
- return error ? 0 : -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)
- continue;
-
- ret = power_supply_find_supply_from_node(np);
- if (ret) {
- dev_dbg(psy->dev, "Failed to find supply, defer!\n");
- of_node_put(np);
- return -EPROBE_DEFER;
- }
- of_node_put(np);
- } while (np);
-
- /* 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,
- 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 = (struct power_supply *)data;
- struct power_supply *epsy = dev_get_drvdata(dev);
-
- if (__power_supply_is_supplied_by(epsy, psy))
- if (!epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret)) {
- if (ret.intval)
- 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->type != POWER_SUPPLY_TYPE_BATTERY) {
- if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
- return 0;
- if (ret.intval)
- 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 (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) {
- psy->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->name, name) == 0;
-}
-
-struct power_supply *power_supply_get_by_name(const char *name)
-{
- struct device *dev = class_find_device(power_supply_class, NULL, name,
- power_supply_match_device_by_name);
-
- return dev ? dev_get_drvdata(dev) : NULL;
-}
-EXPORT_SYMBOL_GPL(power_supply_get_by_name);
-
-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)
-{
- pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
- kfree(dev);
-}
-
-#ifdef CONFIG_THERMAL
-static int power_supply_read_temp(struct thermal_zone_device *tzd,
- unsigned long *temp)
-{
- struct power_supply *psy;
- union power_supply_propval val;
- int ret;
-
- WARN_ON(tzd == NULL);
- psy = tzd->devdata;
- ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &val);
-
- /* Convert tenths of degree Celsius to milli degree Celsius. */
- if (!ret)
- *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;
-
- /* Register battery zone device psy reports temperature */
- for (i = 0; i < psy->num_properties; i++) {
- if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) {
- psy->tzd = thermal_zone_device_register(psy->name, 0, 0,
- psy, &psy_tzd_ops, NULL, 0, 0);
- if (IS_ERR(psy->tzd))
- return PTR_ERR(psy->tzd);
- break;
- }
- }
- 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 = psy->get_property(psy,
- POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX, &val);
- if (!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 = psy->get_property(psy,
- POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT, &val);
- if (!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->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->num_properties; i++) {
- if (psy->properties[i] ==
- POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) {
- psy->tcd = thermal_cooling_device_register(
- (char *)psy->name,
- psy, &psy_tcd_ops);
- if (IS_ERR(psy->tcd))
- return PTR_ERR(psy->tcd);
- break;
- }
- }
- 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
-
-int power_supply_register(struct device *parent, struct power_supply *psy)
-{
- struct device *dev;
- int rc;
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
-
- 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->dev = dev;
-
- INIT_WORK(&psy->changed_work, power_supply_changed_work);
-
- rc = power_supply_check_supplies(psy);
- if (rc) {
- dev_info(dev, "Not all required supplies found, defer probe\n");
- goto check_supplies_failed;
- }
-
- rc = kobject_set_name(&dev->kobj, "%s", psy->name);
- if (rc)
- goto kobject_set_name_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;
-
- power_supply_changed(psy);
-
- goto success;
-
-create_triggers_failed:
- psy_unregister_cooler(psy);
-register_cooler_failed:
- psy_unregister_thermal(psy);
-register_thermal_failed:
- device_del(dev);
-kobject_set_name_failed:
-device_add_failed:
-check_supplies_failed:
- put_device(dev);
-success:
- return rc;
-}
-EXPORT_SYMBOL_GPL(power_supply_register);
-
-void power_supply_unregister(struct power_supply *psy)
-{
- cancel_work_sync(&psy->changed_work);
- sysfs_remove_link(&psy->dev->kobj, "powers");
- power_supply_remove_triggers(psy);
- psy_unregister_cooler(psy);
- psy_unregister_thermal(psy);
- device_unregister(psy->dev);
-}
-EXPORT_SYMBOL_GPL(power_supply_unregister);
-
-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");
generated by cgit (git 2.34.1) at 2025-12-25 08:24:36 +0000