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 [POWER_SUPPLY_CHARGE_TYPE_TAPER_EXT] = "Taper",
95 };
96
97 static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
98 [POWER_SUPPLY_HEALTH_UNKNOWN] = "Unknown",
99 [POWER_SUPPLY_HEALTH_GOOD] = "Good",
100 [POWER_SUPPLY_HEALTH_OVERHEAT] = "Overheat",
101 [POWER_SUPPLY_HEALTH_DEAD] = "Dead",
102 [POWER_SUPPLY_HEALTH_OVERVOLTAGE] = "Over voltage",
103 [POWER_SUPPLY_HEALTH_UNSPEC_FAILURE] = "Unspecified failure",
104 [POWER_SUPPLY_HEALTH_COLD] = "Cold",
105 [POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire",
106 [POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE] = "Safety timer expire",
107 [POWER_SUPPLY_HEALTH_OVERCURRENT] = "Over current",
108 [POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED] = "Calibration required",
109 [POWER_SUPPLY_HEALTH_WARM] = "Warm",
110 [POWER_SUPPLY_HEALTH_COOL] = "Cool",
111 [POWER_SUPPLY_HEALTH_HOT] = "Hot",
112 [POWER_SUPPLY_HEALTH_NO_BATTERY] = "No battery",
113 };
114
115 static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
116 [POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown",
117 [POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH",
118 [POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion",
119 [POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly",
120 [POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe",
121 [POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd",
122 [POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn",
123 };
124
125 static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = {
126 [POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown",
127 [POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical",
128 [POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low",
129 [POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal",
130 [POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High",
131 [POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full",
132 };
133
134 static const char * const POWER_SUPPLY_SCOPE_TEXT[] = {
135 [POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown",
136 [POWER_SUPPLY_SCOPE_SYSTEM] = "System",
137 [POWER_SUPPLY_SCOPE_DEVICE] = "Device",
138 };
139
140 static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = {
141 [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto",
142 [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge",
143 [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge",
144 };
145
146 static struct power_supply_attr power_supply_attrs[] = {
147 /* Properties of type `int' */
148 POWER_SUPPLY_ENUM_ATTR(STATUS),
149 POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE),
150 POWER_SUPPLY_ENUM_ATTR(HEALTH),
151 POWER_SUPPLY_ATTR(PRESENT),
152 POWER_SUPPLY_ATTR(ONLINE),
153 POWER_SUPPLY_ATTR(AUTHENTIC),
154 POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY),
155 POWER_SUPPLY_ATTR(CYCLE_COUNT),
156 POWER_SUPPLY_ATTR(VOLTAGE_MAX),
157 POWER_SUPPLY_ATTR(VOLTAGE_MIN),
158 POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN),
159 POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN),
160 POWER_SUPPLY_ATTR(VOLTAGE_NOW),
161 POWER_SUPPLY_ATTR(VOLTAGE_AVG),
162 POWER_SUPPLY_ATTR(VOLTAGE_OCV),
163 POWER_SUPPLY_ATTR(VOLTAGE_BOOT),
164 POWER_SUPPLY_ATTR(CURRENT_MAX),
165 POWER_SUPPLY_ATTR(CURRENT_NOW),
166 POWER_SUPPLY_ATTR(CURRENT_AVG),
167 POWER_SUPPLY_ATTR(CURRENT_BOOT),
168 POWER_SUPPLY_ATTR(POWER_NOW),
169 POWER_SUPPLY_ATTR(POWER_AVG),
170 POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN),
171 POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN),
172 POWER_SUPPLY_ATTR(CHARGE_FULL),
173 POWER_SUPPLY_ATTR(CHARGE_EMPTY),
174 POWER_SUPPLY_ATTR(CHARGE_NOW),
175 POWER_SUPPLY_ATTR(CHARGE_AVG),
176 POWER_SUPPLY_ATTR(CHARGE_COUNTER),
177 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT),
178 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX),
179 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE),
180 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX),
181 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT),
182 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
183 POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
184 POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
185 POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR),
186 POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
187 POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
188 POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),
189 POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN),
190 POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN),
191 POWER_SUPPLY_ATTR(ENERGY_FULL),
192 POWER_SUPPLY_ATTR(ENERGY_EMPTY),
193 POWER_SUPPLY_ATTR(ENERGY_NOW),
194 POWER_SUPPLY_ATTR(ENERGY_AVG),
195 POWER_SUPPLY_ATTR(CAPACITY),
196 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN),
197 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX),
198 POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN),
199 POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL),
200 POWER_SUPPLY_ATTR(TEMP),
201 POWER_SUPPLY_ATTR(TEMP_MAX),
202 POWER_SUPPLY_ATTR(TEMP_MIN),
203 POWER_SUPPLY_ATTR(TEMP_ALERT_MIN),
204 POWER_SUPPLY_ATTR(TEMP_ALERT_MAX),
205 POWER_SUPPLY_ATTR(TEMP_AMBIENT),
206 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN),
207 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX),
208 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW),
209 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG),
210 POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW),
211 POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG),
212 POWER_SUPPLY_ENUM_ATTR(TYPE),
213 POWER_SUPPLY_ENUM_ATTR(USB_TYPE),
214 POWER_SUPPLY_ENUM_ATTR(SCOPE),
215 POWER_SUPPLY_ATTR(PRECHARGE_CURRENT),
216 POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT),
217 POWER_SUPPLY_ATTR(CALIBRATE),
218 POWER_SUPPLY_ATTR(MANUFACTURE_YEAR),
219 POWER_SUPPLY_ATTR(MANUFACTURE_MONTH),
220 POWER_SUPPLY_ATTR(MANUFACTURE_DAY),
221 /* Properties of type `const char *' */
222 POWER_SUPPLY_ATTR(MODEL_NAME),
223 POWER_SUPPLY_ATTR(MANUFACTURER),
224 POWER_SUPPLY_ATTR(SERIAL_NUMBER),
225 };
226 #define POWER_SUPPLY_ATTR_CNT ARRAY_SIZE(power_supply_attrs)
227
228 static struct attribute *
229 __power_supply_attrs[POWER_SUPPLY_ATTR_CNT + 1];
230
to_ps_attr(struct device_attribute * attr)231 static struct power_supply_attr *to_ps_attr(struct device_attribute *attr)
232 {
233 return container_of(attr, struct power_supply_attr, dev_attr);
234 }
235
dev_attr_psp(struct device_attribute * attr)236 static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
237 {
238 return to_ps_attr(attr) - power_supply_attrs;
239 }
240
power_supply_show_enum_with_available(struct device * dev,const char * const labels[],int label_count,unsigned int available_values,int value,char * buf)241 static ssize_t power_supply_show_enum_with_available(
242 struct device *dev, const char * const labels[], int label_count,
243 unsigned int available_values, int value, char *buf)
244 {
245 bool match = false, available, active;
246 ssize_t count = 0;
247 int i;
248
249 for (i = 0; i < label_count; i++) {
250 available = available_values & BIT(i);
251 active = i == value;
252
253 if (available && active) {
254 count += sysfs_emit_at(buf, count, "[%s] ", labels[i]);
255 match = true;
256 } else if (available) {
257 count += sysfs_emit_at(buf, count, "%s ", labels[i]);
258 }
259 }
260
261 if (!match) {
262 dev_warn(dev, "driver reporting unavailable enum value %d\n", value);
263 return -EINVAL;
264 }
265
266 if (count)
267 buf[count - 1] = '\n';
268
269 return count;
270 }
271
power_supply_show_property(struct device * dev,struct device_attribute * attr,char * buf)272 static ssize_t power_supply_show_property(struct device *dev,
273 struct device_attribute *attr,
274 char *buf) {
275 ssize_t ret;
276 struct power_supply *psy = dev_get_drvdata(dev);
277 struct power_supply_attr *ps_attr = to_ps_attr(attr);
278 enum power_supply_property psp = dev_attr_psp(attr);
279 union power_supply_propval value;
280
281 if (psp == POWER_SUPPLY_PROP_TYPE) {
282 value.intval = psy->desc->type;
283 } else {
284 ret = power_supply_get_property(psy, psp, &value);
285
286 if (ret < 0) {
287 if (ret == -ENODATA)
288 dev_dbg_ratelimited(dev,
289 "driver has no data for `%s' property\n",
290 attr->attr.name);
291 else if (ret != -ENODEV && ret != -EAGAIN)
292 dev_err_ratelimited(dev,
293 "driver failed to report `%s' property: %zd\n",
294 attr->attr.name, ret);
295 return ret;
296 }
297 }
298
299 switch (psp) {
300 case POWER_SUPPLY_PROP_USB_TYPE:
301 ret = power_supply_show_enum_with_available(
302 dev, POWER_SUPPLY_USB_TYPE_TEXT,
303 ARRAY_SIZE(POWER_SUPPLY_USB_TYPE_TEXT),
304 psy->desc->usb_types, value.intval, buf);
305 break;
306 case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
307 ret = power_supply_charge_behaviour_show(dev, psy->desc->charge_behaviours,
308 value.intval, buf);
309 break;
310 case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
311 ret = sysfs_emit(buf, "%s\n", value.strval);
312 break;
313 default:
314 if (ps_attr->text_values_len > 0 &&
315 value.intval < ps_attr->text_values_len && value.intval >= 0) {
316 ret = sysfs_emit(buf, "%s\n", ps_attr->text_values[value.intval]);
317 } else {
318 ret = sysfs_emit(buf, "%d\n", value.intval);
319 }
320 }
321
322 return ret;
323 }
324
power_supply_store_property(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)325 static ssize_t power_supply_store_property(struct device *dev,
326 struct device_attribute *attr,
327 const char *buf, size_t count) {
328 ssize_t ret;
329 struct power_supply *psy = dev_get_drvdata(dev);
330 struct power_supply_attr *ps_attr = to_ps_attr(attr);
331 enum power_supply_property psp = dev_attr_psp(attr);
332 union power_supply_propval value;
333
334 ret = -EINVAL;
335 if (ps_attr->text_values_len > 0) {
336 ret = __sysfs_match_string(ps_attr->text_values,
337 ps_attr->text_values_len, buf);
338 }
339
340 /*
341 * If no match was found, then check to see if it is an integer.
342 * Integer values are valid for enums in addition to the text value.
343 */
344 if (ret < 0) {
345 long long_val;
346
347 ret = kstrtol(buf, 10, &long_val);
348 if (ret < 0)
349 return ret;
350
351 ret = long_val;
352 }
353
354 value.intval = ret;
355
356 ret = power_supply_set_property(psy, psp, &value);
357 if (ret < 0)
358 return ret;
359
360 return count;
361 }
362
power_supply_attr_is_visible(struct kobject * kobj,struct attribute * attr,int attrno)363 static umode_t power_supply_attr_is_visible(struct kobject *kobj,
364 struct attribute *attr,
365 int attrno)
366 {
367 struct device *dev = kobj_to_dev(kobj);
368 struct power_supply *psy = dev_get_drvdata(dev);
369 umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
370 int i;
371
372 if (!power_supply_attrs[attrno].prop_name)
373 return 0;
374
375 if (attrno == POWER_SUPPLY_PROP_TYPE)
376 return mode;
377
378 for (i = 0; i < psy->desc->num_properties; i++) {
379 int property = psy->desc->properties[i];
380
381 if (property == attrno) {
382 if (power_supply_property_is_writeable(psy, property) > 0)
383 mode |= S_IWUSR;
384
385 return mode;
386 }
387 }
388
389 if (power_supply_battery_info_has_prop(psy->battery_info, attrno))
390 return mode;
391
392 return 0;
393 }
394
395 static const struct attribute_group power_supply_attr_group = {
396 .attrs = __power_supply_attrs,
397 .is_visible = power_supply_attr_is_visible,
398 };
399
400 const struct attribute_group *power_supply_attr_groups[] = {
401 &power_supply_attr_group,
402 NULL
403 };
404
power_supply_init_attrs(void)405 void power_supply_init_attrs(void)
406 {
407 int i;
408
409 for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) {
410 struct device_attribute *attr;
411
412 if (!power_supply_attrs[i].prop_name) {
413 pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n",
414 __func__, i);
415 sprintf(power_supply_attrs[i].attr_name, "_err_%d", i);
416 } else {
417 string_lower(power_supply_attrs[i].attr_name,
418 power_supply_attrs[i].attr_name);
419 }
420
421 attr = &power_supply_attrs[i].dev_attr;
422
423 attr->attr.name = power_supply_attrs[i].attr_name;
424 attr->show = power_supply_show_property;
425 attr->store = power_supply_store_property;
426 __power_supply_attrs[i] = &attr->attr;
427 }
428 }
429
add_prop_uevent(const struct device * dev,struct kobj_uevent_env * env,enum power_supply_property prop,char * prop_buf)430 static int add_prop_uevent(const struct device *dev, struct kobj_uevent_env *env,
431 enum power_supply_property prop, char *prop_buf)
432 {
433 int ret = 0;
434 struct power_supply_attr *pwr_attr;
435 struct device_attribute *dev_attr;
436 char *line;
437
438 pwr_attr = &power_supply_attrs[prop];
439 dev_attr = &pwr_attr->dev_attr;
440
441 ret = power_supply_show_property((struct device *)dev, dev_attr, prop_buf);
442 if (ret == -ENODEV || ret == -ENODATA) {
443 /*
444 * When a battery is absent, we expect -ENODEV. Don't abort;
445 * send the uevent with at least the PRESENT=0 property
446 */
447 return 0;
448 }
449
450 if (ret < 0)
451 return ret;
452
453 line = strchr(prop_buf, '\n');
454 if (line)
455 *line = 0;
456
457 return add_uevent_var(env, "POWER_SUPPLY_%s=%s",
458 pwr_attr->prop_name, prop_buf);
459 }
460
power_supply_uevent(const struct device * dev,struct kobj_uevent_env * env)461 int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env)
462 {
463 const struct power_supply *psy = dev_get_drvdata(dev);
464 const enum power_supply_property *battery_props =
465 power_supply_battery_info_properties;
466 unsigned long psy_drv_properties[POWER_SUPPLY_ATTR_CNT /
467 sizeof(unsigned long) + 1] = {0};
468 int ret = 0, j;
469 char *prop_buf;
470
471 if (!psy || !psy->desc) {
472 dev_dbg(dev, "No power supply yet\n");
473 return ret;
474 }
475
476 ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
477 if (ret)
478 return ret;
479
480 /*
481 * Kernel generates KOBJ_REMOVE uevent in device removal path, after
482 * resources have been freed. Exit early to avoid use-after-free.
483 */
484 if (psy->removing)
485 return 0;
486
487 prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
488 if (!prop_buf)
489 return -ENOMEM;
490
491 ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf);
492 if (ret)
493 goto out;
494
495 for (j = 0; j < psy->desc->num_properties; j++) {
496 set_bit(psy->desc->properties[j], psy_drv_properties);
497 ret = add_prop_uevent(dev, env, psy->desc->properties[j],
498 prop_buf);
499 if (ret)
500 goto out;
501 }
502
503 for (j = 0; j < power_supply_battery_info_properties_size; j++) {
504 if (test_bit(battery_props[j], psy_drv_properties))
505 continue;
506 if (!power_supply_battery_info_has_prop(psy->battery_info,
507 battery_props[j]))
508 continue;
509 ret = add_prop_uevent(dev, env, battery_props[j],
510 prop_buf);
511 if (ret)
512 goto out;
513 }
514
515 out:
516 free_page((unsigned long)prop_buf);
517
518 return ret;
519 }
520
power_supply_charge_behaviour_show(struct device * dev,unsigned int available_behaviours,enum power_supply_charge_behaviour current_behaviour,char * buf)521 ssize_t power_supply_charge_behaviour_show(struct device *dev,
522 unsigned int available_behaviours,
523 enum power_supply_charge_behaviour current_behaviour,
524 char *buf)
525 {
526 return power_supply_show_enum_with_available(
527 dev, POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT,
528 ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT),
529 available_behaviours, current_behaviour, buf);
530 }
531 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
532
power_supply_charge_behaviour_parse(unsigned int available_behaviours,const char * buf)533 int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
534 {
535 int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
536
537 if (i < 0)
538 return i;
539
540 if (available_behaviours & BIT(i))
541 return i;
542
543 return -EINVAL;
544 }
545 EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);
546