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 #include <linux/string_helpers.h> 19 20 #include "power_supply.h" 21 22 #define MAX_PROP_NAME_LEN 30 23 24 struct power_supply_attr { 25 const char *prop_name; 26 char attr_name[MAX_PROP_NAME_LEN + 1]; 27 struct device_attribute dev_attr; 28 const char * const *text_values; 29 int text_values_len; 30 }; 31 32 #define _POWER_SUPPLY_ATTR(_name, _text, _len) \ 33 [POWER_SUPPLY_PROP_ ## _name] = \ 34 { \ 35 .prop_name = #_name, \ 36 .attr_name = #_name "\0", \ 37 .text_values = _text, \ 38 .text_values_len = _len, \ 39 } 40 41 #define POWER_SUPPLY_ATTR(_name) _POWER_SUPPLY_ATTR(_name, NULL, 0) 42 #define _POWER_SUPPLY_ENUM_ATTR(_name, _text) \ 43 _POWER_SUPPLY_ATTR(_name, _text, ARRAY_SIZE(_text)) 44 #define POWER_SUPPLY_ENUM_ATTR(_name) \ 45 _POWER_SUPPLY_ENUM_ATTR(_name, POWER_SUPPLY_ ## _name ## _TEXT) 46 47 static const char * const POWER_SUPPLY_TYPE_TEXT[] = { 48 [POWER_SUPPLY_TYPE_UNKNOWN] = "Unknown", 49 [POWER_SUPPLY_TYPE_BATTERY] = "Battery", 50 [POWER_SUPPLY_TYPE_UPS] = "UPS", 51 [POWER_SUPPLY_TYPE_MAINS] = "Mains", 52 [POWER_SUPPLY_TYPE_USB] = "USB", 53 [POWER_SUPPLY_TYPE_USB_DCP] = "USB_DCP", 54 [POWER_SUPPLY_TYPE_USB_CDP] = "USB_CDP", 55 [POWER_SUPPLY_TYPE_USB_ACA] = "USB_ACA", 56 [POWER_SUPPLY_TYPE_USB_TYPE_C] = "USB_C", 57 [POWER_SUPPLY_TYPE_USB_PD] = "USB_PD", 58 [POWER_SUPPLY_TYPE_USB_PD_DRP] = "USB_PD_DRP", 59 [POWER_SUPPLY_TYPE_APPLE_BRICK_ID] = "BrickID", 60 [POWER_SUPPLY_TYPE_WIRELESS] = "Wireless", 61 }; 62 63 static const char * const POWER_SUPPLY_USB_TYPE_TEXT[] = { 64 [POWER_SUPPLY_USB_TYPE_UNKNOWN] = "Unknown", 65 [POWER_SUPPLY_USB_TYPE_SDP] = "SDP", 66 [POWER_SUPPLY_USB_TYPE_DCP] = "DCP", 67 [POWER_SUPPLY_USB_TYPE_CDP] = "CDP", 68 [POWER_SUPPLY_USB_TYPE_ACA] = "ACA", 69 [POWER_SUPPLY_USB_TYPE_C] = "C", 70 [POWER_SUPPLY_USB_TYPE_PD] = "PD", 71 [POWER_SUPPLY_USB_TYPE_PD_DRP] = "PD_DRP", 72 [POWER_SUPPLY_USB_TYPE_PD_PPS] = "PD_PPS", 73 [POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID] = "BrickID", 74 }; 75 76 static const char * const POWER_SUPPLY_STATUS_TEXT[] = { 77 [POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown", 78 [POWER_SUPPLY_STATUS_CHARGING] = "Charging", 79 [POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging", 80 [POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging", 81 [POWER_SUPPLY_STATUS_FULL] = "Full", 82 }; 83 84 static const char * const POWER_SUPPLY_CHARGE_TYPE_TEXT[] = { 85 [POWER_SUPPLY_CHARGE_TYPE_UNKNOWN] = "Unknown", 86 [POWER_SUPPLY_CHARGE_TYPE_NONE] = "N/A", 87 [POWER_SUPPLY_CHARGE_TYPE_TRICKLE] = "Trickle", 88 [POWER_SUPPLY_CHARGE_TYPE_FAST] = "Fast", 89 [POWER_SUPPLY_CHARGE_TYPE_STANDARD] = "Standard", 90 [POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE] = "Adaptive", 91 [POWER_SUPPLY_CHARGE_TYPE_CUSTOM] = "Custom", 92 [POWER_SUPPLY_CHARGE_TYPE_LONGLIFE] = "Long Life", 93 [POWER_SUPPLY_CHARGE_TYPE_BYPASS] = "Bypass", 94 }; 95 96 static const char * const POWER_SUPPLY_HEALTH_TEXT[] = { 97 [POWER_SUPPLY_HEALTH_UNKNOWN] = "Unknown", 98 [POWER_SUPPLY_HEALTH_GOOD] = "Good", 99 [POWER_SUPPLY_HEALTH_OVERHEAT] = "Overheat", 100 [POWER_SUPPLY_HEALTH_DEAD] = "Dead", 101 [POWER_SUPPLY_HEALTH_OVERVOLTAGE] = "Over voltage", 102 [POWER_SUPPLY_HEALTH_UNSPEC_FAILURE] = "Unspecified failure", 103 [POWER_SUPPLY_HEALTH_COLD] = "Cold", 104 [POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire", 105 [POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE] = "Safety timer expire", 106 [POWER_SUPPLY_HEALTH_OVERCURRENT] = "Over current", 107 [POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED] = "Calibration required", 108 [POWER_SUPPLY_HEALTH_WARM] = "Warm", 109 [POWER_SUPPLY_HEALTH_COOL] = "Cool", 110 [POWER_SUPPLY_HEALTH_HOT] = "Hot", 111 [POWER_SUPPLY_HEALTH_NO_BATTERY] = "No battery", 112 }; 113 114 static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = { 115 [POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown", 116 [POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH", 117 [POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion", 118 [POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly", 119 [POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe", 120 [POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd", 121 [POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn", 122 }; 123 124 static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = { 125 [POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown", 126 [POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical", 127 [POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low", 128 [POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal", 129 [POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High", 130 [POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full", 131 }; 132 133 static const char * const POWER_SUPPLY_SCOPE_TEXT[] = { 134 [POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown", 135 [POWER_SUPPLY_SCOPE_SYSTEM] = "System", 136 [POWER_SUPPLY_SCOPE_DEVICE] = "Device", 137 }; 138 139 static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = { 140 [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto", 141 [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge", 142 [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge", 143 }; 144 145 static struct power_supply_attr power_supply_attrs[] = { 146 /* Properties of type `int' */ 147 POWER_SUPPLY_ENUM_ATTR(STATUS), 148 POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE), 149 POWER_SUPPLY_ENUM_ATTR(HEALTH), 150 POWER_SUPPLY_ATTR(PRESENT), 151 POWER_SUPPLY_ATTR(ONLINE), 152 POWER_SUPPLY_ATTR(AUTHENTIC), 153 POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY), 154 POWER_SUPPLY_ATTR(CYCLE_COUNT), 155 POWER_SUPPLY_ATTR(VOLTAGE_MAX), 156 POWER_SUPPLY_ATTR(VOLTAGE_MIN), 157 POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN), 158 POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN), 159 POWER_SUPPLY_ATTR(VOLTAGE_NOW), 160 POWER_SUPPLY_ATTR(VOLTAGE_AVG), 161 POWER_SUPPLY_ATTR(VOLTAGE_OCV), 162 POWER_SUPPLY_ATTR(VOLTAGE_BOOT), 163 POWER_SUPPLY_ATTR(CURRENT_MAX), 164 POWER_SUPPLY_ATTR(CURRENT_NOW), 165 POWER_SUPPLY_ATTR(CURRENT_AVG), 166 POWER_SUPPLY_ATTR(CURRENT_BOOT), 167 POWER_SUPPLY_ATTR(POWER_NOW), 168 POWER_SUPPLY_ATTR(POWER_AVG), 169 POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN), 170 POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN), 171 POWER_SUPPLY_ATTR(CHARGE_FULL), 172 POWER_SUPPLY_ATTR(CHARGE_EMPTY), 173 POWER_SUPPLY_ATTR(CHARGE_NOW), 174 POWER_SUPPLY_ATTR(CHARGE_AVG), 175 POWER_SUPPLY_ATTR(CHARGE_COUNTER), 176 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT), 177 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX), 178 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE), 179 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX), 180 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT), 181 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX), 182 POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD), 183 POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD), 184 POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR), 185 POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT), 186 POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT), 187 POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT), 188 POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN), 189 POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN), 190 POWER_SUPPLY_ATTR(ENERGY_FULL), 191 POWER_SUPPLY_ATTR(ENERGY_EMPTY), 192 POWER_SUPPLY_ATTR(ENERGY_NOW), 193 POWER_SUPPLY_ATTR(ENERGY_AVG), 194 POWER_SUPPLY_ATTR(CAPACITY), 195 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN), 196 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX), 197 POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN), 198 POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL), 199 POWER_SUPPLY_ATTR(TEMP), 200 POWER_SUPPLY_ATTR(TEMP_MAX), 201 POWER_SUPPLY_ATTR(TEMP_MIN), 202 POWER_SUPPLY_ATTR(TEMP_ALERT_MIN), 203 POWER_SUPPLY_ATTR(TEMP_ALERT_MAX), 204 POWER_SUPPLY_ATTR(TEMP_AMBIENT), 205 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN), 206 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX), 207 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW), 208 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG), 209 POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW), 210 POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG), 211 POWER_SUPPLY_ENUM_ATTR(TYPE), 212 POWER_SUPPLY_ATTR(USB_TYPE), 213 POWER_SUPPLY_ENUM_ATTR(SCOPE), 214 POWER_SUPPLY_ATTR(PRECHARGE_CURRENT), 215 POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT), 216 POWER_SUPPLY_ATTR(CALIBRATE), 217 POWER_SUPPLY_ATTR(MANUFACTURE_YEAR), 218 POWER_SUPPLY_ATTR(MANUFACTURE_MONTH), 219 POWER_SUPPLY_ATTR(MANUFACTURE_DAY), 220 /* Properties of type `const char *' */ 221 POWER_SUPPLY_ATTR(MODEL_NAME), 222 POWER_SUPPLY_ATTR(MANUFACTURER), 223 POWER_SUPPLY_ATTR(SERIAL_NUMBER), 224 }; 225 #define POWER_SUPPLY_ATTR_CNT ARRAY_SIZE(power_supply_attrs) 226 227 static struct attribute * 228 __power_supply_attrs[POWER_SUPPLY_ATTR_CNT + 1]; 229 230 static struct power_supply_attr *to_ps_attr(struct device_attribute *attr) 231 { 232 return container_of(attr, struct power_supply_attr, dev_attr); 233 } 234 235 static enum power_supply_property dev_attr_psp(struct device_attribute *attr) 236 { 237 return to_ps_attr(attr) - power_supply_attrs; 238 } 239 240 static ssize_t power_supply_show_usb_type(struct device *dev, 241 const struct power_supply_desc *desc, 242 union power_supply_propval *value, 243 char *buf) 244 { 245 enum power_supply_usb_type usb_type; 246 ssize_t count = 0; 247 bool match = false; 248 int i; 249 250 for (i = 0; i < desc->num_usb_types; ++i) { 251 usb_type = desc->usb_types[i]; 252 253 if (value->intval == usb_type) { 254 count += sysfs_emit_at(buf, count, "[%s] ", 255 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]); 256 match = true; 257 } else { 258 count += sysfs_emit_at(buf, count, "%s ", 259 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]); 260 } 261 } 262 263 if (!match) { 264 dev_warn(dev, "driver reporting unsupported connected type\n"); 265 return -EINVAL; 266 } 267 268 if (count) 269 buf[count - 1] = '\n'; 270 271 return count; 272 } 273 274 static ssize_t power_supply_show_charge_behaviour(struct device *dev, 275 struct power_supply *psy, 276 union power_supply_propval *value, 277 char *buf) 278 { 279 int ret; 280 281 ret = power_supply_get_property(psy, 282 POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR, 283 value); 284 if (ret < 0) 285 return ret; 286 287 return power_supply_charge_behaviour_show(dev, psy->desc->charge_behaviours, 288 value->intval, buf); 289 } 290 291 static ssize_t power_supply_show_property(struct device *dev, 292 struct device_attribute *attr, 293 char *buf) { 294 ssize_t ret; 295 struct power_supply *psy = dev_get_drvdata(dev); 296 struct power_supply_attr *ps_attr = to_ps_attr(attr); 297 enum power_supply_property psp = dev_attr_psp(attr); 298 union power_supply_propval value; 299 300 if (psp == POWER_SUPPLY_PROP_TYPE) { 301 value.intval = psy->desc->type; 302 } else { 303 ret = power_supply_get_property(psy, psp, &value); 304 305 if (ret < 0) { 306 if (ret == -ENODATA) 307 dev_dbg_ratelimited(dev, 308 "driver has no data for `%s' property\n", 309 attr->attr.name); 310 else if (ret != -ENODEV && ret != -EAGAIN) 311 dev_err_ratelimited(dev, 312 "driver failed to report `%s' property: %zd\n", 313 attr->attr.name, ret); 314 return ret; 315 } 316 } 317 318 switch (psp) { 319 case POWER_SUPPLY_PROP_USB_TYPE: 320 ret = power_supply_show_usb_type(dev, psy->desc, 321 &value, buf); 322 break; 323 case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: 324 ret = power_supply_show_charge_behaviour(dev, psy, &value, buf); 325 break; 326 case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER: 327 ret = sysfs_emit(buf, "%s\n", value.strval); 328 break; 329 default: 330 if (ps_attr->text_values_len > 0 && 331 value.intval < ps_attr->text_values_len && value.intval >= 0) { 332 ret = sysfs_emit(buf, "%s\n", ps_attr->text_values[value.intval]); 333 } else { 334 ret = sysfs_emit(buf, "%d\n", value.intval); 335 } 336 } 337 338 return ret; 339 } 340 341 static ssize_t power_supply_store_property(struct device *dev, 342 struct device_attribute *attr, 343 const char *buf, size_t count) { 344 ssize_t ret; 345 struct power_supply *psy = dev_get_drvdata(dev); 346 struct power_supply_attr *ps_attr = to_ps_attr(attr); 347 enum power_supply_property psp = dev_attr_psp(attr); 348 union power_supply_propval value; 349 350 ret = -EINVAL; 351 if (ps_attr->text_values_len > 0) { 352 ret = __sysfs_match_string(ps_attr->text_values, 353 ps_attr->text_values_len, buf); 354 } 355 356 /* 357 * If no match was found, then check to see if it is an integer. 358 * Integer values are valid for enums in addition to the text value. 359 */ 360 if (ret < 0) { 361 long long_val; 362 363 ret = kstrtol(buf, 10, &long_val); 364 if (ret < 0) 365 return ret; 366 367 ret = long_val; 368 } 369 370 value.intval = ret; 371 372 ret = power_supply_set_property(psy, psp, &value); 373 if (ret < 0) 374 return ret; 375 376 return count; 377 } 378 379 static umode_t power_supply_attr_is_visible(struct kobject *kobj, 380 struct attribute *attr, 381 int attrno) 382 { 383 struct device *dev = kobj_to_dev(kobj); 384 struct power_supply *psy = dev_get_drvdata(dev); 385 umode_t mode = S_IRUSR | S_IRGRP | S_IROTH; 386 int i; 387 388 if (!power_supply_attrs[attrno].prop_name) 389 return 0; 390 391 if (attrno == POWER_SUPPLY_PROP_TYPE) 392 return mode; 393 394 for (i = 0; i < psy->desc->num_properties; i++) { 395 int property = psy->desc->properties[i]; 396 397 if (property == attrno) { 398 if (psy->desc->property_is_writeable && 399 psy->desc->property_is_writeable(psy, property) > 0) 400 mode |= S_IWUSR; 401 402 return mode; 403 } 404 } 405 406 if (power_supply_battery_info_has_prop(psy->battery_info, attrno)) 407 return mode; 408 409 return 0; 410 } 411 412 static const struct attribute_group power_supply_attr_group = { 413 .attrs = __power_supply_attrs, 414 .is_visible = power_supply_attr_is_visible, 415 }; 416 417 const struct attribute_group *power_supply_attr_groups[] = { 418 &power_supply_attr_group, 419 NULL 420 }; 421 422 void power_supply_init_attrs(void) 423 { 424 int i; 425 426 for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) { 427 struct device_attribute *attr; 428 429 if (!power_supply_attrs[i].prop_name) { 430 pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n", 431 __func__, i); 432 sprintf(power_supply_attrs[i].attr_name, "_err_%d", i); 433 } else { 434 string_lower(power_supply_attrs[i].attr_name, 435 power_supply_attrs[i].attr_name); 436 } 437 438 attr = &power_supply_attrs[i].dev_attr; 439 440 attr->attr.name = power_supply_attrs[i].attr_name; 441 attr->show = power_supply_show_property; 442 attr->store = power_supply_store_property; 443 __power_supply_attrs[i] = &attr->attr; 444 } 445 } 446 447 static int add_prop_uevent(const struct device *dev, struct kobj_uevent_env *env, 448 enum power_supply_property prop, char *prop_buf) 449 { 450 int ret = 0; 451 struct power_supply_attr *pwr_attr; 452 struct device_attribute *dev_attr; 453 char *line; 454 455 pwr_attr = &power_supply_attrs[prop]; 456 dev_attr = &pwr_attr->dev_attr; 457 458 ret = power_supply_show_property((struct device *)dev, dev_attr, prop_buf); 459 if (ret == -ENODEV || ret == -ENODATA) { 460 /* 461 * When a battery is absent, we expect -ENODEV. Don't abort; 462 * send the uevent with at least the PRESENT=0 property 463 */ 464 return 0; 465 } 466 467 if (ret < 0) 468 return ret; 469 470 line = strchr(prop_buf, '\n'); 471 if (line) 472 *line = 0; 473 474 return add_uevent_var(env, "POWER_SUPPLY_%s=%s", 475 pwr_attr->prop_name, prop_buf); 476 } 477 478 int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env) 479 { 480 const struct power_supply *psy = dev_get_drvdata(dev); 481 const enum power_supply_property *battery_props = 482 power_supply_battery_info_properties; 483 unsigned long psy_drv_properties[POWER_SUPPLY_ATTR_CNT / 484 sizeof(unsigned long) + 1] = {0}; 485 int ret = 0, j; 486 char *prop_buf; 487 488 if (!psy || !psy->desc) { 489 dev_dbg(dev, "No power supply yet\n"); 490 return ret; 491 } 492 493 ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name); 494 if (ret) 495 return ret; 496 497 /* 498 * Kernel generates KOBJ_REMOVE uevent in device removal path, after 499 * resources have been freed. Exit early to avoid use-after-free. 500 */ 501 if (psy->removing) 502 return 0; 503 504 prop_buf = (char *)get_zeroed_page(GFP_KERNEL); 505 if (!prop_buf) 506 return -ENOMEM; 507 508 ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf); 509 if (ret) 510 goto out; 511 512 for (j = 0; j < psy->desc->num_properties; j++) { 513 set_bit(psy->desc->properties[j], psy_drv_properties); 514 ret = add_prop_uevent(dev, env, psy->desc->properties[j], 515 prop_buf); 516 if (ret) 517 goto out; 518 } 519 520 for (j = 0; j < power_supply_battery_info_properties_size; j++) { 521 if (test_bit(battery_props[j], psy_drv_properties)) 522 continue; 523 if (!power_supply_battery_info_has_prop(psy->battery_info, 524 battery_props[j])) 525 continue; 526 ret = add_prop_uevent(dev, env, battery_props[j], 527 prop_buf); 528 if (ret) 529 goto out; 530 } 531 532 out: 533 free_page((unsigned long)prop_buf); 534 535 return ret; 536 } 537 538 ssize_t power_supply_charge_behaviour_show(struct device *dev, 539 unsigned int available_behaviours, 540 enum power_supply_charge_behaviour current_behaviour, 541 char *buf) 542 { 543 bool match = false, available, active; 544 ssize_t count = 0; 545 int i; 546 547 for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) { 548 available = available_behaviours & BIT(i); 549 active = i == current_behaviour; 550 551 if (available && active) { 552 count += sysfs_emit_at(buf, count, "[%s] ", 553 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); 554 match = true; 555 } else if (available) { 556 count += sysfs_emit_at(buf, count, "%s ", 557 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]); 558 } 559 } 560 561 if (!match) { 562 dev_warn(dev, "driver reporting unsupported charge behaviour\n"); 563 return -EINVAL; 564 } 565 566 if (count) 567 buf[count - 1] = '\n'; 568 569 return count; 570 } 571 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show); 572 573 int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf) 574 { 575 int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf); 576 577 if (i < 0) 578 return i; 579 580 if (available_behaviours & BIT(i)) 581 return i; 582 583 return -EINVAL; 584 } 585 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse); 586