Blame view
drivers/power/power_supply_core.c
5.44 KB
4a11b59d8
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
/* * 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> |
5f487cd34
|
16 |
#include <linux/slab.h> |
4a11b59d8
|
17 18 19 20 |
#include <linux/device.h> #include <linux/err.h> #include <linux/power_supply.h> #include "power_supply.h" |
ff3417e7e
|
21 |
/* exported for the APM Power driver, APM emulation */ |
4a11b59d8
|
22 |
struct class *power_supply_class; |
ff3417e7e
|
23 |
EXPORT_SYMBOL_GPL(power_supply_class); |
4a11b59d8
|
24 |
|
5f487cd34
|
25 |
static struct device_type power_supply_dev_type; |
443cad920
|
26 27 28 29 30 31 32 33 34 35 36 37 38 |
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); int i; for (i = 0; i < psy->num_supplicants; i++) if (!strcmp(psy->supplied_to[i], pst->name)) { if (pst->external_power_changed) pst->external_power_changed(pst); } return 0; } |
4a11b59d8
|
39 40 41 42 |
static void power_supply_changed_work(struct work_struct *work) { struct power_supply *psy = container_of(work, struct power_supply, changed_work); |
4a11b59d8
|
43 |
|
0cddc0a90
|
44 45 |
dev_dbg(psy->dev, "%s ", __func__); |
4a11b59d8
|
46 |
|
93562b537
|
47 |
class_for_each_device(power_supply_class, NULL, psy, |
443cad920
|
48 |
__power_supply_changed_work); |
4a11b59d8
|
49 50 51 52 |
power_supply_update_leds(psy); kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE); |
4a11b59d8
|
53 54 55 56 |
} void power_supply_changed(struct power_supply *psy) { |
0cddc0a90
|
57 58 |
dev_dbg(psy->dev, "%s ", __func__); |
4a11b59d8
|
59 60 |
schedule_work(&psy->changed_work); |
4a11b59d8
|
61 |
} |
ff3417e7e
|
62 |
EXPORT_SYMBOL_GPL(power_supply_changed); |
4a11b59d8
|
63 |
|
443cad920
|
64 |
static int __power_supply_am_i_supplied(struct device *dev, void *data) |
4a11b59d8
|
65 66 |
{ union power_supply_propval ret = {0,}; |
443cad920
|
67 68 69 70 71 72 73 74 75 76 77 |
struct power_supply *psy = (struct power_supply *)data; struct power_supply *epsy = dev_get_drvdata(dev); int i; for (i = 0; i < epsy->num_supplicants; i++) { if (!strcmp(epsy->supplied_to[i], psy->name)) { if (epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret)) continue; if (ret.intval) return ret.intval; |
4a11b59d8
|
78 79 |
} } |
443cad920
|
80 81 82 83 84 85 |
return 0; } int power_supply_am_i_supplied(struct power_supply *psy) { int error; |
93562b537
|
86 |
error = class_for_each_device(power_supply_class, NULL, psy, |
443cad920
|
87 |
__power_supply_am_i_supplied); |
4a11b59d8
|
88 |
|
0cddc0a90
|
89 90 |
dev_dbg(psy->dev, "%s %d ", __func__, error); |
4a11b59d8
|
91 |
|
443cad920
|
92 |
return error; |
4a11b59d8
|
93 |
} |
ff3417e7e
|
94 |
EXPORT_SYMBOL_GPL(power_supply_am_i_supplied); |
4a11b59d8
|
95 |
|
942ed1619
|
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 |
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); 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; error = class_for_each_device(power_supply_class, NULL, NULL, __power_supply_is_system_supplied); return error; } |
ff3417e7e
|
119 |
EXPORT_SYMBOL_GPL(power_supply_is_system_supplied); |
942ed1619
|
120 |
|
e5f5ccb64
|
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 |
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, 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(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); |
5f487cd34
|
148 149 150 151 152 153 |
static void power_supply_dev_release(struct device *dev) { pr_debug("device: '%s': %s ", dev_name(dev), __func__); kfree(dev); } |
4a11b59d8
|
154 155 |
int power_supply_register(struct device *parent, struct power_supply *psy) { |
5f487cd34
|
156 157 |
struct device *dev; int rc; |
4a11b59d8
|
158 |
|
5f487cd34
|
159 160 161 |
dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (!dev) return -ENOMEM; |
4a11b59d8
|
162 |
|
5f487cd34
|
163 |
device_initialize(dev); |
4a11b59d8
|
164 |
|
5f487cd34
|
165 166 167 168 169 170 |
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; |
977746725
|
171 |
INIT_WORK(&psy->changed_work, power_supply_changed_work); |
5f487cd34
|
172 173 174 175 176 |
rc = kobject_set_name(&dev->kobj, "%s", psy->name); if (rc) goto kobject_set_name_failed; rc = device_add(dev); |
4a11b59d8
|
177 |
if (rc) |
5f487cd34
|
178 |
goto device_add_failed; |
4a11b59d8
|
179 180 181 182 183 184 185 186 187 |
rc = power_supply_create_triggers(psy); if (rc) goto create_triggers_failed; power_supply_changed(psy); goto success; create_triggers_failed: |
3a2dbd611
|
188 |
device_del(dev); |
5f487cd34
|
189 190 |
kobject_set_name_failed: device_add_failed: |
3a2dbd611
|
191 |
put_device(dev); |
4a11b59d8
|
192 193 194 |
success: return rc; } |
ff3417e7e
|
195 |
EXPORT_SYMBOL_GPL(power_supply_register); |
4a11b59d8
|
196 197 198 |
void power_supply_unregister(struct power_supply *psy) { |
bc51e7ff5
|
199 |
cancel_work_sync(&psy->changed_work); |
4a11b59d8
|
200 |
power_supply_remove_triggers(psy); |
4a11b59d8
|
201 |
device_unregister(psy->dev); |
4a11b59d8
|
202 |
} |
ff3417e7e
|
203 |
EXPORT_SYMBOL_GPL(power_supply_unregister); |
4a11b59d8
|
204 205 206 207 208 209 210 211 212 |
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; |
5f487cd34
|
213 |
power_supply_init_attrs(&power_supply_dev_type); |
4a11b59d8
|
214 215 216 217 218 219 220 |
return 0; } static void __exit power_supply_class_exit(void) { class_destroy(power_supply_class); |
4a11b59d8
|
221 |
} |
4a11b59d8
|
222 223 224 225 226 227 228 229 |
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"); |