tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
23struct 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
46static 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
62static 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
75static 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
83static 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
94static 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 [POWER_SUPPLY_HEALTH_NO_BATTERY] = "No battery",
110};
111
112static const char * const POWER_SUPPLY_TECHNOLOGY_TEXT[] = {
113 [POWER_SUPPLY_TECHNOLOGY_UNKNOWN] = "Unknown",
114 [POWER_SUPPLY_TECHNOLOGY_NiMH] = "NiMH",
115 [POWER_SUPPLY_TECHNOLOGY_LION] = "Li-ion",
116 [POWER_SUPPLY_TECHNOLOGY_LIPO] = "Li-poly",
117 [POWER_SUPPLY_TECHNOLOGY_LiFe] = "LiFe",
118 [POWER_SUPPLY_TECHNOLOGY_NiCd] = "NiCd",
119 [POWER_SUPPLY_TECHNOLOGY_LiMn] = "LiMn",
120};
121
122static const char * const POWER_SUPPLY_CAPACITY_LEVEL_TEXT[] = {
123 [POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN] = "Unknown",
124 [POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL] = "Critical",
125 [POWER_SUPPLY_CAPACITY_LEVEL_LOW] = "Low",
126 [POWER_SUPPLY_CAPACITY_LEVEL_NORMAL] = "Normal",
127 [POWER_SUPPLY_CAPACITY_LEVEL_HIGH] = "High",
128 [POWER_SUPPLY_CAPACITY_LEVEL_FULL] = "Full",
129};
130
131static const char * const POWER_SUPPLY_SCOPE_TEXT[] = {
132 [POWER_SUPPLY_SCOPE_UNKNOWN] = "Unknown",
133 [POWER_SUPPLY_SCOPE_SYSTEM] = "System",
134 [POWER_SUPPLY_SCOPE_DEVICE] = "Device",
135};
136
137static const char * const POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[] = {
138 [POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO] = "auto",
139 [POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE] = "inhibit-charge",
140 [POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE] = "force-discharge",
141};
142
143static struct power_supply_attr power_supply_attrs[] = {
144 /* Properties of type `int' */
145 POWER_SUPPLY_ENUM_ATTR(STATUS),
146 POWER_SUPPLY_ENUM_ATTR(CHARGE_TYPE),
147 POWER_SUPPLY_ENUM_ATTR(HEALTH),
148 POWER_SUPPLY_ATTR(PRESENT),
149 POWER_SUPPLY_ATTR(ONLINE),
150 POWER_SUPPLY_ATTR(AUTHENTIC),
151 POWER_SUPPLY_ENUM_ATTR(TECHNOLOGY),
152 POWER_SUPPLY_ATTR(CYCLE_COUNT),
153 POWER_SUPPLY_ATTR(VOLTAGE_MAX),
154 POWER_SUPPLY_ATTR(VOLTAGE_MIN),
155 POWER_SUPPLY_ATTR(VOLTAGE_MAX_DESIGN),
156 POWER_SUPPLY_ATTR(VOLTAGE_MIN_DESIGN),
157 POWER_SUPPLY_ATTR(VOLTAGE_NOW),
158 POWER_SUPPLY_ATTR(VOLTAGE_AVG),
159 POWER_SUPPLY_ATTR(VOLTAGE_OCV),
160 POWER_SUPPLY_ATTR(VOLTAGE_BOOT),
161 POWER_SUPPLY_ATTR(CURRENT_MAX),
162 POWER_SUPPLY_ATTR(CURRENT_NOW),
163 POWER_SUPPLY_ATTR(CURRENT_AVG),
164 POWER_SUPPLY_ATTR(CURRENT_BOOT),
165 POWER_SUPPLY_ATTR(POWER_NOW),
166 POWER_SUPPLY_ATTR(POWER_AVG),
167 POWER_SUPPLY_ATTR(CHARGE_FULL_DESIGN),
168 POWER_SUPPLY_ATTR(CHARGE_EMPTY_DESIGN),
169 POWER_SUPPLY_ATTR(CHARGE_FULL),
170 POWER_SUPPLY_ATTR(CHARGE_EMPTY),
171 POWER_SUPPLY_ATTR(CHARGE_NOW),
172 POWER_SUPPLY_ATTR(CHARGE_AVG),
173 POWER_SUPPLY_ATTR(CHARGE_COUNTER),
174 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT),
175 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_CURRENT_MAX),
176 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE),
177 POWER_SUPPLY_ATTR(CONSTANT_CHARGE_VOLTAGE_MAX),
178 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT),
179 POWER_SUPPLY_ATTR(CHARGE_CONTROL_LIMIT_MAX),
180 POWER_SUPPLY_ATTR(CHARGE_CONTROL_START_THRESHOLD),
181 POWER_SUPPLY_ATTR(CHARGE_CONTROL_END_THRESHOLD),
182 POWER_SUPPLY_ENUM_ATTR(CHARGE_BEHAVIOUR),
183 POWER_SUPPLY_ATTR(INPUT_CURRENT_LIMIT),
184 POWER_SUPPLY_ATTR(INPUT_VOLTAGE_LIMIT),
185 POWER_SUPPLY_ATTR(INPUT_POWER_LIMIT),
186 POWER_SUPPLY_ATTR(ENERGY_FULL_DESIGN),
187 POWER_SUPPLY_ATTR(ENERGY_EMPTY_DESIGN),
188 POWER_SUPPLY_ATTR(ENERGY_FULL),
189 POWER_SUPPLY_ATTR(ENERGY_EMPTY),
190 POWER_SUPPLY_ATTR(ENERGY_NOW),
191 POWER_SUPPLY_ATTR(ENERGY_AVG),
192 POWER_SUPPLY_ATTR(CAPACITY),
193 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MIN),
194 POWER_SUPPLY_ATTR(CAPACITY_ALERT_MAX),
195 POWER_SUPPLY_ATTR(CAPACITY_ERROR_MARGIN),
196 POWER_SUPPLY_ENUM_ATTR(CAPACITY_LEVEL),
197 POWER_SUPPLY_ATTR(TEMP),
198 POWER_SUPPLY_ATTR(TEMP_MAX),
199 POWER_SUPPLY_ATTR(TEMP_MIN),
200 POWER_SUPPLY_ATTR(TEMP_ALERT_MIN),
201 POWER_SUPPLY_ATTR(TEMP_ALERT_MAX),
202 POWER_SUPPLY_ATTR(TEMP_AMBIENT),
203 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MIN),
204 POWER_SUPPLY_ATTR(TEMP_AMBIENT_ALERT_MAX),
205 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_NOW),
206 POWER_SUPPLY_ATTR(TIME_TO_EMPTY_AVG),
207 POWER_SUPPLY_ATTR(TIME_TO_FULL_NOW),
208 POWER_SUPPLY_ATTR(TIME_TO_FULL_AVG),
209 POWER_SUPPLY_ENUM_ATTR(TYPE),
210 POWER_SUPPLY_ATTR(USB_TYPE),
211 POWER_SUPPLY_ENUM_ATTR(SCOPE),
212 POWER_SUPPLY_ATTR(PRECHARGE_CURRENT),
213 POWER_SUPPLY_ATTR(CHARGE_TERM_CURRENT),
214 POWER_SUPPLY_ATTR(CALIBRATE),
215 POWER_SUPPLY_ATTR(MANUFACTURE_YEAR),
216 POWER_SUPPLY_ATTR(MANUFACTURE_MONTH),
217 POWER_SUPPLY_ATTR(MANUFACTURE_DAY),
218 /* Properties of type `const char *' */
219 POWER_SUPPLY_ATTR(MODEL_NAME),
220 POWER_SUPPLY_ATTR(MANUFACTURER),
221 POWER_SUPPLY_ATTR(SERIAL_NUMBER),
222};
223
224static struct attribute *
225__power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
226
227static struct power_supply_attr *to_ps_attr(struct device_attribute *attr)
228{
229 return container_of(attr, struct power_supply_attr, dev_attr);
230}
231
232static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
233{
234 return to_ps_attr(attr) - power_supply_attrs;
235}
236
237static ssize_t power_supply_show_usb_type(struct device *dev,
238 const struct power_supply_desc *desc,
239 union power_supply_propval *value,
240 char *buf)
241{
242 enum power_supply_usb_type usb_type;
243 ssize_t count = 0;
244 bool match = false;
245 int i;
246
247 for (i = 0; i < desc->num_usb_types; ++i) {
248 usb_type = desc->usb_types[i];
249
250 if (value->intval == usb_type) {
251 count += sprintf(buf + count, "[%s] ",
252 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
253 match = true;
254 } else {
255 count += sprintf(buf + count, "%s ",
256 POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
257 }
258 }
259
260 if (!match) {
261 dev_warn(dev, "driver reporting unsupported connected type\n");
262 return -EINVAL;
263 }
264
265 if (count)
266 buf[count - 1] = '\n';
267
268 return count;
269}
270
271static ssize_t power_supply_show_property(struct device *dev,
272 struct device_attribute *attr,
273 char *buf) {
274 ssize_t ret;
275 struct power_supply *psy = dev_get_drvdata(dev);
276 struct power_supply_attr *ps_attr = to_ps_attr(attr);
277 enum power_supply_property psp = dev_attr_psp(attr);
278 union power_supply_propval value;
279
280 if (psp == POWER_SUPPLY_PROP_TYPE) {
281 value.intval = psy->desc->type;
282 } else {
283 ret = power_supply_get_property(psy, psp, &value);
284
285 if (ret < 0) {
286 if (ret == -ENODATA)
287 dev_dbg(dev, "driver has no data for `%s' property\n",
288 attr->attr.name);
289 else if (ret != -ENODEV && ret != -EAGAIN)
290 dev_err_ratelimited(dev,
291 "driver failed to report `%s' property: %zd\n",
292 attr->attr.name, ret);
293 return ret;
294 }
295 }
296
297 if (ps_attr->text_values_len > 0 &&
298 value.intval < ps_attr->text_values_len && value.intval >= 0) {
299 return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]);
300 }
301
302 switch (psp) {
303 case POWER_SUPPLY_PROP_USB_TYPE:
304 ret = power_supply_show_usb_type(dev, psy->desc,
305 &value, buf);
306 break;
307 case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
308 ret = sprintf(buf, "%s\n", value.strval);
309 break;
310 default:
311 ret = sprintf(buf, "%d\n", value.intval);
312 }
313
314 return ret;
315}
316
317static ssize_t power_supply_store_property(struct device *dev,
318 struct device_attribute *attr,
319 const char *buf, size_t count) {
320 ssize_t ret;
321 struct power_supply *psy = dev_get_drvdata(dev);
322 struct power_supply_attr *ps_attr = to_ps_attr(attr);
323 enum power_supply_property psp = dev_attr_psp(attr);
324 union power_supply_propval value;
325
326 ret = -EINVAL;
327 if (ps_attr->text_values_len > 0) {
328 ret = __sysfs_match_string(ps_attr->text_values,
329 ps_attr->text_values_len, buf);
330 }
331
332 /*
333 * If no match was found, then check to see if it is an integer.
334 * Integer values are valid for enums in addition to the text value.
335 */
336 if (ret < 0) {
337 long long_val;
338
339 ret = kstrtol(buf, 10, &long_val);
340 if (ret < 0)
341 return ret;
342
343 ret = long_val;
344 }
345
346 value.intval = ret;
347
348 ret = power_supply_set_property(psy, psp, &value);
349 if (ret < 0)
350 return ret;
351
352 return count;
353}
354
355static umode_t power_supply_attr_is_visible(struct kobject *kobj,
356 struct attribute *attr,
357 int attrno)
358{
359 struct device *dev = kobj_to_dev(kobj);
360 struct power_supply *psy = dev_get_drvdata(dev);
361 umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
362 int i;
363
364 if (!power_supply_attrs[attrno].prop_name)
365 return 0;
366
367 if (attrno == POWER_SUPPLY_PROP_TYPE)
368 return mode;
369
370 for (i = 0; i < psy->desc->num_properties; i++) {
371 int property = psy->desc->properties[i];
372
373 if (property == attrno) {
374 if (psy->desc->property_is_writeable &&
375 psy->desc->property_is_writeable(psy, property) > 0)
376 mode |= S_IWUSR;
377
378 return mode;
379 }
380 }
381
382 return 0;
383}
384
385static const struct attribute_group power_supply_attr_group = {
386 .attrs = __power_supply_attrs,
387 .is_visible = power_supply_attr_is_visible,
388};
389
390static const struct attribute_group *power_supply_attr_groups[] = {
391 &power_supply_attr_group,
392 NULL,
393};
394
395static void str_to_lower(char *str)
396{
397 while (*str) {
398 *str = tolower(*str);
399 str++;
400 }
401}
402
403void power_supply_init_attrs(struct device_type *dev_type)
404{
405 int i;
406
407 dev_type->groups = power_supply_attr_groups;
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 str_to_lower(power_supply_attrs[i].attr_name);
418 }
419
420 attr = &power_supply_attrs[i].dev_attr;
421
422 attr->attr.name = power_supply_attrs[i].attr_name;
423 attr->show = power_supply_show_property;
424 attr->store = power_supply_store_property;
425 __power_supply_attrs[i] = &attr->attr;
426 }
427}
428
429static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
430 enum power_supply_property prop, char *prop_buf)
431{
432 int ret = 0;
433 struct power_supply_attr *pwr_attr;
434 struct device_attribute *dev_attr;
435 char *line;
436
437 pwr_attr = &power_supply_attrs[prop];
438 dev_attr = &pwr_attr->dev_attr;
439
440 ret = power_supply_show_property(dev, dev_attr, prop_buf);
441 if (ret == -ENODEV || ret == -ENODATA) {
442 /*
443 * When a battery is absent, we expect -ENODEV. Don't abort;
444 * send the uevent with at least the the PRESENT=0 property
445 */
446 return 0;
447 }
448
449 if (ret < 0)
450 return ret;
451
452 line = strchr(prop_buf, '\n');
453 if (line)
454 *line = 0;
455
456 return add_uevent_var(env, "POWER_SUPPLY_%s=%s",
457 pwr_attr->prop_name, prop_buf);
458}
459
460int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
461{
462 struct power_supply *psy = dev_get_drvdata(dev);
463 int ret = 0, j;
464 char *prop_buf;
465
466 if (!psy || !psy->desc) {
467 dev_dbg(dev, "No power supply yet\n");
468 return ret;
469 }
470
471 ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
472 if (ret)
473 return ret;
474
475 prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
476 if (!prop_buf)
477 return -ENOMEM;
478
479 ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf);
480 if (ret)
481 goto out;
482
483 for (j = 0; j < psy->desc->num_properties; j++) {
484 ret = add_prop_uevent(dev, env, psy->desc->properties[j],
485 prop_buf);
486 if (ret)
487 goto out;
488 }
489
490out:
491 free_page((unsigned long)prop_buf);
492
493 return ret;
494}
495
496ssize_t power_supply_charge_behaviour_show(struct device *dev,
497 unsigned int available_behaviours,
498 enum power_supply_charge_behaviour current_behaviour,
499 char *buf)
500{
501 bool match = false, available, active;
502 ssize_t count = 0;
503 int i;
504
505 for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
506 available = available_behaviours & BIT(i);
507 active = i == current_behaviour;
508
509 if (available && active) {
510 count += sysfs_emit_at(buf, count, "[%s] ",
511 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
512 match = true;
513 } else if (available) {
514 count += sysfs_emit_at(buf, count, "%s ",
515 POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
516 }
517 }
518
519 if (!match) {
520 dev_warn(dev, "driver reporting unsupported charge behaviour\n");
521 return -EINVAL;
522 }
523
524 if (count)
525 buf[count - 1] = '\n';
526
527 return count;
528}
529EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
530
531int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
532{
533 int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
534
535 if (i < 0)
536 return i;
537
538 if (available_behaviours & BIT(i))
539 return i;
540
541 return -EINVAL;
542}
543EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);