1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Sysfs interface for the universal power supply monitor class 4 * 5 * Copyright © 2007 David Woodhouse <dwmw2@infradead.org> 6 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru> 7 * Copyright © 2004 Szabolcs Gyurko 8 * Copyright © 2003 Ian Molton <spyro@f2s.com> 9 * 10 * Modified: 2004, Oct Szabolcs Gyurko 11 */ 12 13 #include <linux/ctype.h> 14 #include <linux/device.h> 15 #include <linux/power_supply.h> 16 #include <linux/slab.h> 17 #include <linux/stat.h> 18 19 #include "power_supply.h" 20 21 #define MAX_PROP_NAME_LEN 30 22 23 struct power_supply_attr { 24 const char *prop_name; 25 char attr_name[MAX_PROP_NAME_LEN + 1]; 26 struct device_attribute dev_attr; 27 const char * const *text_values; 28 int text_values_len; 29 }; 30 31 #define _POWER_SUPPLY_ATTR(_name, _text, _len) \ 32 [POWER_SUPPLY_PROP_ ## _name] = \ 33 { \ 34 .prop_name = #_name, \ 35 .attr_name = #_name "\0", \ 36 .text_values = _text, \ 37 .text_values_len = _len, \ 38 } 39 40 #define POWER_SUPPLY_ATTR(_name) _POWER_SUPPLY_ATTR(_name, NULL, 0) 41 #define _POWER_SUPPLY_ENUM_ATTR(_name, _text) \ 42 _POWER_SUPPLY_ATTR(_name, _text, ARRAY_SIZE(_text)) 43 #define POWER_SUPPLY_ENUM_ATTR(_name) \ 44 _POWER_SUPPLY_ENUM_ATTR(_name, POWER_SUPPLY_ ## _name ## _TEXT) 45 46 static const char * const POWER_SUPPLY_TYPE_TEXT[] = { 47 [POWER_SUPPLY_TYPE_UNKNOWN] = "Unknown", 48 [POWER_SUPPLY_TYPE_BATTERY] = "Battery", 49 [POWER_SUPPLY_TYPE_UPS] = "UPS", 50 [POWER_SUPPLY_TYPE_MAINS] = "Mains", 51 [POWER_SUPPLY_TYPE_USB] = "USB", 52 [POWER_SUPPLY_TYPE_USB_DCP] = "USB_DCP", 53 [POWER_SUPPLY_TYPE_USB_CDP] = "USB_CDP", 54 [POWER_SUPPLY_TYPE_USB_ACA] = "USB_ACA", 55 [POWER_SUPPLY_TYPE_USB_TYPE_C] = "USB_C", 56 [POWER_SUPPLY_TYPE_USB_PD] = "USB_PD", 57 [POWER_SUPPLY_TYPE_USB_PD_DRP] = "USB_PD_DRP", 58 [POWER_SUPPLY_TYPE_APPLE_BRICK_ID] = "BrickID", 59 [POWER_SUPPLY_TYPE_WIRELESS] = "Wireless", 60 }; 61 62 static const char * const POWER_SUPPLY_USB_TYPE_TEXT[] = { 63 [POWER_SUPPLY_USB_TYPE_UNKNOWN] = "Unknown", 64 [POWER_SUPPLY_USB_TYPE_SDP] = "SDP", 65 [POWER_SUPPLY_USB_TYPE_DCP] = "DCP", 66 [POWER_SUPPLY_USB_TYPE_CDP] = "CDP", 67 [POWER_SUPPLY_USB_TYPE_ACA] = "ACA", 68 [POWER_SUPPLY_USB_TYPE_C] = "C", 69 [POWER_SUPPLY_USB_TYPE_PD] = "PD", 70 [POWER_SUPPLY_USB_TYPE_PD_DRP] = "PD_DRP", 71 [POWER_SUPPLY_USB_TYPE_PD_PPS] = "PD_PPS", 72 [POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID] = "BrickID", 73 }; 74 75 static const char * const POWER_SUPPLY_STATUS_TEXT[] = { 76 [POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown", 77 [POWER_SUPPLY_STATUS_CHARGING] = "Charging", 78 [POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging", 79 [POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging", 80 [POWER_SUPPLY_STATUS_FULL] = "Full", 81 }; 82 83 static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = { 84 [POWER_SUPPLY_CHARGE_TYPE_UNKNOWN] = "Unknown", 85 [POWER_SUPPLY_CHARGE_TYPE_NONE] = "N/A", 86 [POWER_SUPPLY_CHARGE_TYPE_TRICKLE] = "Trickle", 87 [POWER_SUPPLY_CHARGE_TYPE_FAST] = "Fast", 88 [POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard", 89 [POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive", 90 [POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom", 91 [POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Long Life", 92 }; 93 94 static const char * const POWER_SUPPLY_HEALTH_TEXT[] = { 95 [POWER_SUPPLY_HEALTH_UNKNOWN] = "Unknown", 96 [POWER_SUPPLY_HEALTH_GOOD] = "Good", 97 [POWER_SUPPLY_HEALTH_OVERHEAT] = "Overheat", 98 [POWER_SUPPLY_HEALTH_DEAD] = "Dead", 99 [POWER_SUPPLY_HEALTH_OVERVOLTAGE] = "Over voltage", 100 [POWER_SUPPLY_HEALTH_UNSPEC_FAILURE] = "Unspecified failure", 101 [POWER_SUPPLY_HEALTH_COLD] = "Cold", 102 [POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire", 103 [POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE] = "Safety timer expire", 104 [POWER_SUPPLY_HEALTH_OVERCURRENT] = "Over current", 105 [POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED] = "Calibration required", 106 [POWER_SUPPLY_HEALTH_WARM] = "Warm", 107 [POWER_SUPPLY_HEALTH_COOL] = "Cool", 108 [POWER_SUPPLY_HEALTH_HOT] = "Hot", 109 }; 110 111 static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = { 112 [POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown", 113 [POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH", 114 [POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion", 115 [POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly", 116 [POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe", 117 [POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd", 118 [POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn", 119 }; 120 121 static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = { 122 [POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown", 123 [POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical", 124 [POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low", 125 [POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal", 126 [POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High", 127 [POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full", 128 }; 129 130 static const char * const POWER_SUPPLY_SCOPE_TEXT[] = { 131 [POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown", 132 [POWER_SUPPLY_SCOPE_SYSTEM] = "System", 133 [POWER_SUPPLY_SCOPE_DEVICE] = "Device", 134 }; 135 136 static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = { 137 [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto", 138 [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge", 139 [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge", 140 }; 141 142 static struct power_supply_attr power_supply_attrs[] = { 143 /* Properties of type `int' */ 144 POWER_SUPPLY_ENUM_ATTR(STATUS), 145 POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE), 146 POWER_SUPPLY_ENUM_ATTR(HEALTH), 147 POWER_SUPPLY_ATTR(PRESENT), 148 POWER_SUPPLY_ATTR(ONLINE), 149 POWER_SUPPLY_ATTR(AUTHENTIC), 150 POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY), 151 POWER_SUPPLY_ATTR(CYCLE_COUNT), 152 POWER_SUPPLY_ATTR(VOLTAGE_MAX), 153 POWER_SUPPLY_ATTR(VOLTAGE_MIN), 154 POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN), 155 POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN), 156 POWER_SUPPLY_ATTR(VOLTAGE_NOW), 157 POWER_SUPPLY_ATTR(VOLTAGE_AVG), 158 POWER_SUPPLY_ATTR(VOLTAGE_OCV), 159 POWER_SUPPLY_ATTR(VOLTAGE_BOOT), 160 POWER_SUPPLY_ATTR(CURRENT_MAX), 161 POWER_SUPPLY_ATTR(CURRENT_NOW), 162 POWER_SUPPLY_ATTR(CURRENT_AVG), 163 POWER_SUPPLY_ATTR(CURRENT_BOOT), 164 POWER_SUPPLY_ATTR(POWER_NOW), 165 POWER_SUPPLY_ATTR(POWER_AVG), 166 POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN), 167 POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN), 168 POWER_SUPPLY_ATTR(CHARGE_FULL), 169 POWER_SUPPLY_ATTR(CHARGE_EMPTY), 170 POWER_SUPPLY_ATTR(CHARGE_NOW), 171 POWER_SUPPLY_ATTR(CHARGE_AVG), 172 POWER_SUPPLY_ATTR(CHARGE_COUNTER), 173 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT), 174 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX), 175 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE), 176 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX), 177 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT), 178 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX), 179 POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD), 180 POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD), 181 POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT), 182 POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT), 183 POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT), 184 POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN), 185 POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN), 186 POWER_SUPPLY_ATTR(ENERGY_FULL), 187 POWER_SUPPLY_ATTR(ENERGY_EMPTY), 188 POWER_SUPPLY_ATTR(ENERGY_NOW), 189 POWER_SUPPLY_ATTR(ENERGY_AVG), 190 POWER_SUPPLY_ATTR(CAPACITY), 191 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN), 192 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX), 193 POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN), 194 POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL), 195 POWER_SUPPLY_ATTR(TEMP), 196 POWER_SUPPLY_ATTR(TEMP_MAX), 197 POWER_SUPPLY_ATTR(TEMP_MIN), 198 POWER_SUPPLY_ATTR(TEMP_ALERT_MIN), 199 POWER_SUPPLY_ATTR(TEMP_ALERT_MAX), 200 POWER_SUPPLY_ATTR(TEMP_AMBIENT), 201 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN), 202 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX), 203 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW), 204 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG), 205 POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW), 206 POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG), 207 POWER_SUPPLY_ENUM_ATTR(TYPE), 208 POWER_SUPPLY_ATTR(USB_TYPE), 209 POWER_SUPPLY_ENUM_ATTR(SCOPE), 210 POWER_SUPPLY_ATTR(PRECHARGE_CURRENT), 211 POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT), 212 POWER_SUPPLY_ATTR(CALIBRATE), 213 POWER_SUPPLY_ATTR(MANUFACTURE_YEAR), 214 POWER_SUPPLY_ATTR(MANUFACTURE_MONTH), 215 POWER_SUPPLY_ATTR(MANUFACTURE_DAY), 216 /* Properties of type `const char *' */ 217 POWER_SUPPLY_ATTR(MODEL_NAME), 218 POWER_SUPPLY_ATTR(MANUFACTURER), 219 POWER_SUPPLY_ATTR(SERIAL_NUMBER), 220 }; 221 222 static struct attribute * 223 __power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1]; 224 225 static struct power_supply_attr *to_ps_attr(struct device_attribute *attr) 226 { 227 return container_of(attr, struct power_supply_attr, dev_attr); 228 } 229 230 static enum power_supply_property dev_attr_psp(struct device_attribute *attr) 231 { 232 return to_ps_attr(attr) - power_supply_attrs; 233 } 234 235 static ssize_t power_supply_show_usb_type(struct device *dev, 236 const struct power_supply_desc *desc, 237 union power_supply_propval *value, 238 char *buf) 239 { 240 enum power_supply_usb_type usb_type; 241 ssize_t count = 0; 242 bool match = false; 243 int i; 244 245 for (i = 0; i < desc->num_usb_types; ++i) { 246 usb_type = desc->usb_types[i]; 247 248 if (value->intval == usb_type) { 249 count += sprintf(buf + count, "[%s] ", 250 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]); 251 match = true; 252 } else { 253 count += sprintf(buf + count, "%s ", 254 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]); 255 } 256 } 257 258 if (!match) { 259 dev_warn(dev, "driver reporting unsupported connected type\n"); 260 return -EINVAL; 261 } 262 263 if (count) 264 buf[count - 1] = '\n'; 265 266 return count; 267 } 268 269 static ssize_t power_supply_show_property(struct device *dev, 270 struct device_attribute *attr, 271 char *buf) { 272 ssize_t ret; 273 struct power_supply *psy = dev_get_drvdata(dev); 274 struct power_supply_attr *ps_attr = to_ps_attr(attr); 275 enum power_supply_property psp = dev_attr_psp(attr); 276 union power_supply_propval value; 277 278 if (psp == POWER_SUPPLY_PROP_TYPE) { 279 value.intval = psy->desc->type; 280 } else { 281 ret = power_supply_get_property(psy, psp, &value); 282 283 if (ret < 0) { 284 if (ret == -ENODATA) 285 dev_dbg(dev, "driver has no data for `%s' property\n", 286 attr->attr.name); 287 else if (ret != -ENODEV && ret != -EAGAIN) 288 dev_err_ratelimited(dev, 289 "driver failed to report `%s' property: %zd\n", 290 attr->attr.name, ret); 291 return ret; 292 } 293 } 294 295 if (ps_attr->text_values_len > 0 && 296 value.intval < ps_attr->text_values_len && value.intval >= 0) { 297 return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]); 298 } 299 300 switch (psp) { 301 case POWER_SUPPLY_PROP_USB_TYPE: 302 ret = power_supply_show_usb_type(dev, psy->desc, 303 &value, buf); 304 break; 305 case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER: 306 ret = sprintf(buf, "%s\n", value.strval); 307 break; 308 default: 309 ret = sprintf(buf, "%d\n", value.intval); 310 } 311 312 return ret; 313 } 314 315 static ssize_t power_supply_store_property(struct device *dev, 316 struct device_attribute *attr, 317 const char *buf, size_t count) { 318 ssize_t ret; 319 struct power_supply *psy = dev_get_drvdata(dev); 320 struct power_supply_attr *ps_attr = to_ps_attr(attr); 321 enum power_supply_property psp = dev_attr_psp(attr); 322 union power_supply_propval value; 323 324 ret = -EINVAL; 325 if (ps_attr->text_values_len > 0) { 326 ret = __sysfs_match_string(ps_attr->text_values, 327 ps_attr->text_values_len, buf); 328 } 329 330 /* 331 * If no match was found, then check to see if it is an integer. 332 * Integer values are valid for enums in addition to the text value. 333 */ 334 if (ret < 0) { 335 long long_val; 336 337 ret = kstrtol(buf, 10, &long_val); 338 if (ret < 0) 339 return ret; 340 341 ret = long_val; 342 } 343 344 value.intval = ret; 345 346 ret = power_supply_set_property(psy, psp, &value); 347 if (ret < 0) 348 return ret; 349 350 return count; 351 } 352 353 static umode_t power_supply_attr_is_visible(struct kobject *kobj, 354 struct attribute *attr, 355 int attrno) 356 { 357 struct device *dev = kobj_to_dev(kobj); 358 struct power_supply *psy = dev_get_drvdata(dev); 359 umode_t mode = S_IRUSR | S_IRGRP | S_IROTH; 360 int i; 361 362 if (!power_supply_attrs[attrno].prop_name) 363 return 0; 364 365 if (attrno == POWER_SUPPLY_PROP_TYPE) 366 return mode; 367 368 for (i = 0; i < psy->desc->num_properties; i++) { 369 int property = psy->desc->properties[i]; 370 371 if (property == attrno) { 372 if (psy->desc->property_is_writeable && 373 psy->desc->property_is_writeable(psy, property) > 0) 374 mode |= S_IWUSR; 375 376 return mode; 377 } 378 } 379 380 return 0; 381 } 382 383 static const struct attribute_group power_supply_attr_group = { 384 .attrs = __power_supply_attrs, 385 .is_visible = power_supply_attr_is_visible, 386 }; 387 388 static const struct attribute_group *power_supply_attr_groups[] = { 389 &power_supply_attr_group, 390 NULL, 391 }; 392 393 static void str_to_lower(char *str) 394 { 395 while (*str) { 396 *str = tolower(*str); 397 str++; 398 } 399 } 400 401 void power_supply_init_attrs(struct device_type *dev_type) 402 { 403 int i; 404 405 dev_type->groups = power_supply_attr_groups; 406 407 for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) { 408 struct device_attribute *attr; 409 410 if (!power_supply_attrs[i].prop_name) { 411 pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n", 412 __func__, i); 413 sprintf(power_supply_attrs[i].attr_name, "_err_%d", i); 414 } else { 415 str_to_lower(power_supply_attrs[i].attr_name); 416 } 417 418 attr = &power_supply_attrs[i].dev_attr; 419 420 attr->attr.name = power_supply_attrs[i].attr_name; 421 attr->show = power_supply_show_property; 422 attr->store = power_supply_store_property; 423 __power_supply_attrs[i] = &attr->attr; 424 } 425 } 426 427 static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env, 428 enum power_supply_property prop, char *prop_buf) 429 { 430 int ret = 0; 431 struct power_supply_attr *pwr_attr; 432 struct device_attribute *dev_attr; 433 char *line; 434 435 pwr_attr = &power_supply_attrs[prop]; 436 dev_attr = &pwr_attr->dev_attr; 437 438 ret = power_supply_show_property(dev, dev_attr, prop_buf); 439 if (ret == -ENODEV || ret == -ENODATA) { 440 /* 441 * When a battery is absent, we expect -ENODEV. Don't abort; 442 * send the uevent with at least the the PRESENT=0 property 443 */ 444 return 0; 445 } 446 447 if (ret < 0) 448 return ret; 449 450 line = strchr(prop_buf, '\n'); 451 if (line) 452 *line = 0; 453 454 return add_uevent_var(env, "POWER_SUPPLY_%s=%s", 455 pwr_attr->prop_name, prop_buf); 456 } 457 458 int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env) 459 { 460 struct power_supply *psy = dev_get_drvdata(dev); 461 int ret = 0, j; 462 char *prop_buf; 463 464 if (!psy || !psy->desc) { 465 dev_dbg(dev, "No power supply yet\n"); 466 return ret; 467 } 468 469 ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name); 470 if (ret) 471 return ret; 472 473 prop_buf = (char *)get_zeroed_page(GFP_KERNEL); 474 if (!prop_buf) 475 return -ENOMEM; 476 477 ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf); 478 if (ret) 479 goto out; 480 481 for (j = 0; j < psy->desc->num_properties; j++) { 482 ret = add_prop_uevent(dev, env, psy->desc->properties[j], 483 prop_buf); 484 if (ret) 485 goto out; 486 } 487 488 out: 489 free_page((unsigned long)prop_buf); 490 491 return ret; 492 } 493 494 ssize_t power_supply_charge_behaviour_show(struct device *dev, 495 unsigned int available_behaviours, 496 enum power_supply_charge_behaviour current_behaviour, 497 char *buf) 498 { 499 bool match = false, available, active; 500 ssize_t count = 0; 501 int i; 502 503 for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) { 504 available = available_behaviours & BIT(i); 505 active = i == current_behaviour; 506 507 if (available && active) { 508 count += sysfs_emit_at(buf, count, "[%s] ", 509 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); 510 match = true; 511 } else if (available) { 512 count += sysfs_emit_at(buf, count, "%s ", 513 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); 514 } 515 } 516 517 if (!match) { 518 dev_warn(dev, "driver reporting unsupported charge behaviour\n"); 519 return -EINVAL; 520 } 521 522 if (count) 523 buf[count - 1] = '\n'; 524 525 return count; 526 } 527 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show); 528 529 int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf) 530 { 531 int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf); 532 533 if (i < 0) 534 return i; 535 536 if (available_behaviours & BIT(i)) 537 return i; 538 539 return -EINVAL; 540 } 541 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse); 542