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