Line data Source code
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 :
225 : static struct attribute *
226 : __power_supply_attrs[ARRAY_SIZE(power_supply_attrs) + 1];
227 :
228 : static struct power_supply_attr *to_ps_attr(struct device_attribute *attr)
229 : {
230 0 : return container_of(attr, struct power_supply_attr, dev_attr);
231 : }
232 :
233 : static enum power_supply_property dev_attr_psp(struct device_attribute *attr)
234 : {
235 0 : return to_ps_attr(attr) - power_supply_attrs;
236 : }
237 :
238 0 : static ssize_t power_supply_show_usb_type(struct device *dev,
239 : const struct power_supply_desc *desc,
240 : union power_supply_propval *value,
241 : char *buf)
242 : {
243 : enum power_supply_usb_type usb_type;
244 0 : ssize_t count = 0;
245 0 : bool match = false;
246 : int i;
247 :
248 0 : for (i = 0; i < desc->num_usb_types; ++i) {
249 0 : usb_type = desc->usb_types[i];
250 :
251 0 : if (value->intval == usb_type) {
252 0 : count += sprintf(buf + count, "[%s] ",
253 : POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
254 0 : match = true;
255 : } else {
256 0 : count += sprintf(buf + count, "%s ",
257 : POWER_SUPPLY_USB_TYPE_TEXT[usb_type]);
258 : }
259 : }
260 :
261 0 : if (!match) {
262 0 : dev_warn(dev, "driver reporting unsupported connected type\n");
263 : return -EINVAL;
264 : }
265 :
266 0 : if (count)
267 0 : buf[count - 1] = '\n';
268 :
269 : return count;
270 : }
271 :
272 0 : static ssize_t power_supply_show_property(struct device *dev,
273 : struct device_attribute *attr,
274 : char *buf) {
275 : ssize_t ret;
276 0 : struct power_supply *psy = dev_get_drvdata(dev);
277 0 : struct power_supply_attr *ps_attr = to_ps_attr(attr);
278 0 : enum power_supply_property psp = dev_attr_psp(attr);
279 : union power_supply_propval value;
280 :
281 0 : if (psp == POWER_SUPPLY_PROP_TYPE) {
282 0 : value.intval = psy->desc->type;
283 : } else {
284 0 : ret = power_supply_get_property(psy, psp, &value);
285 :
286 0 : if (ret < 0) {
287 0 : if (ret == -ENODATA)
288 : dev_dbg(dev, "driver has no data for `%s' property\n",
289 : attr->attr.name);
290 0 : else if (ret != -ENODEV && ret != -EAGAIN)
291 0 : dev_err_ratelimited(dev,
292 : "driver failed to report `%s' property: %zd\n",
293 : attr->attr.name, ret);
294 : return ret;
295 : }
296 : }
297 :
298 0 : if (ps_attr->text_values_len > 0 &&
299 0 : value.intval < ps_attr->text_values_len && value.intval >= 0) {
300 0 : return sprintf(buf, "%s\n", ps_attr->text_values[value.intval]);
301 : }
302 :
303 0 : switch (psp) {
304 : case POWER_SUPPLY_PROP_USB_TYPE:
305 0 : ret = power_supply_show_usb_type(dev, psy->desc,
306 : &value, buf);
307 0 : break;
308 : case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
309 0 : ret = sprintf(buf, "%s\n", value.strval);
310 0 : break;
311 : default:
312 0 : ret = sprintf(buf, "%d\n", value.intval);
313 : }
314 :
315 : return ret;
316 : }
317 :
318 0 : static ssize_t power_supply_store_property(struct device *dev,
319 : struct device_attribute *attr,
320 : const char *buf, size_t count) {
321 : ssize_t ret;
322 0 : struct power_supply *psy = dev_get_drvdata(dev);
323 0 : struct power_supply_attr *ps_attr = to_ps_attr(attr);
324 0 : enum power_supply_property psp = dev_attr_psp(attr);
325 : union power_supply_propval value;
326 :
327 0 : ret = -EINVAL;
328 0 : if (ps_attr->text_values_len > 0) {
329 0 : ret = __sysfs_match_string(ps_attr->text_values,
330 : ps_attr->text_values_len, buf);
331 : }
332 :
333 : /*
334 : * If no match was found, then check to see if it is an integer.
335 : * Integer values are valid for enums in addition to the text value.
336 : */
337 0 : if (ret < 0) {
338 : long long_val;
339 :
340 0 : ret = kstrtol(buf, 10, &long_val);
341 0 : if (ret < 0)
342 0 : return ret;
343 :
344 0 : ret = long_val;
345 : }
346 :
347 0 : value.intval = ret;
348 :
349 0 : ret = power_supply_set_property(psy, psp, &value);
350 0 : if (ret < 0)
351 : return ret;
352 :
353 0 : return count;
354 : }
355 :
356 0 : static umode_t power_supply_attr_is_visible(struct kobject *kobj,
357 : struct attribute *attr,
358 : int attrno)
359 : {
360 0 : struct device *dev = kobj_to_dev(kobj);
361 0 : struct power_supply *psy = dev_get_drvdata(dev);
362 0 : umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
363 : int i;
364 :
365 0 : if (!power_supply_attrs[attrno].prop_name)
366 : return 0;
367 :
368 0 : if (attrno == POWER_SUPPLY_PROP_TYPE)
369 : return mode;
370 :
371 0 : for (i = 0; i < psy->desc->num_properties; i++) {
372 0 : int property = psy->desc->properties[i];
373 :
374 0 : if (property == attrno) {
375 0 : if (psy->desc->property_is_writeable &&
376 0 : psy->desc->property_is_writeable(psy, property) > 0)
377 0 : mode |= S_IWUSR;
378 :
379 : return mode;
380 : }
381 : }
382 :
383 : return 0;
384 : }
385 :
386 : static const struct attribute_group power_supply_attr_group = {
387 : .attrs = __power_supply_attrs,
388 : .is_visible = power_supply_attr_is_visible,
389 : };
390 :
391 : static const struct attribute_group *power_supply_attr_groups[] = {
392 : &power_supply_attr_group,
393 : NULL,
394 : };
395 :
396 : static void str_to_lower(char *str)
397 : {
398 1149 : while (*str) {
399 2146 : *str = tolower(*str);
400 1073 : str++;
401 : }
402 : }
403 :
404 1 : void power_supply_init_attrs(struct device_type *dev_type)
405 : {
406 : int i;
407 :
408 1 : dev_type->groups = power_supply_attr_groups;
409 :
410 77 : for (i = 0; i < ARRAY_SIZE(power_supply_attrs); i++) {
411 : struct device_attribute *attr;
412 :
413 76 : if (!power_supply_attrs[i].prop_name) {
414 0 : pr_warn("%s: Property %d skipped because it is missing from power_supply_attrs\n",
415 : __func__, i);
416 0 : sprintf(power_supply_attrs[i].attr_name, "_err_%d", i);
417 : } else {
418 76 : str_to_lower(power_supply_attrs[i].attr_name);
419 : }
420 :
421 76 : attr = &power_supply_attrs[i].dev_attr;
422 :
423 76 : attr->attr.name = power_supply_attrs[i].attr_name;
424 76 : attr->show = power_supply_show_property;
425 76 : attr->store = power_supply_store_property;
426 76 : __power_supply_attrs[i] = &attr->attr;
427 : }
428 1 : }
429 :
430 0 : static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
431 : enum power_supply_property prop, char *prop_buf)
432 : {
433 0 : int ret = 0;
434 : struct power_supply_attr *pwr_attr;
435 : struct device_attribute *dev_attr;
436 : char *line;
437 :
438 0 : pwr_attr = &power_supply_attrs[prop];
439 0 : dev_attr = &pwr_attr->dev_attr;
440 :
441 0 : ret = power_supply_show_property(dev, dev_attr, prop_buf);
442 0 : 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 the PRESENT=0 property
446 : */
447 : return 0;
448 : }
449 :
450 0 : if (ret < 0)
451 : return ret;
452 :
453 0 : line = strchr(prop_buf, '\n');
454 0 : if (line)
455 0 : *line = 0;
456 :
457 0 : return add_uevent_var(env, "POWER_SUPPLY_%s=%s",
458 : pwr_attr->prop_name, prop_buf);
459 : }
460 :
461 0 : int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
462 : {
463 0 : struct power_supply *psy = dev_get_drvdata(dev);
464 0 : int ret = 0, j;
465 : char *prop_buf;
466 :
467 0 : if (!psy || !psy->desc) {
468 : dev_dbg(dev, "No power supply yet\n");
469 : return ret;
470 : }
471 :
472 0 : ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->desc->name);
473 0 : if (ret)
474 : return ret;
475 :
476 0 : prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
477 0 : if (!prop_buf)
478 : return -ENOMEM;
479 :
480 0 : ret = add_prop_uevent(dev, env, POWER_SUPPLY_PROP_TYPE, prop_buf);
481 0 : if (ret)
482 : goto out;
483 :
484 0 : for (j = 0; j < psy->desc->num_properties; j++) {
485 0 : ret = add_prop_uevent(dev, env, psy->desc->properties[j],
486 : prop_buf);
487 0 : if (ret)
488 : goto out;
489 : }
490 :
491 : out:
492 0 : free_page((unsigned long)prop_buf);
493 :
494 0 : return ret;
495 : }
496 :
497 0 : ssize_t power_supply_charge_behaviour_show(struct device *dev,
498 : unsigned int available_behaviours,
499 : enum power_supply_charge_behaviour current_behaviour,
500 : char *buf)
501 : {
502 0 : bool match = false, available, active;
503 0 : ssize_t count = 0;
504 : int i;
505 :
506 0 : for (i = 0; i < ARRAY_SIZE(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT); i++) {
507 0 : available = available_behaviours & BIT(i);
508 0 : active = i == current_behaviour;
509 :
510 0 : if (available && active) {
511 0 : count += sysfs_emit_at(buf, count, "[%s] ",
512 : POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
513 0 : match = true;
514 0 : } else if (available) {
515 0 : count += sysfs_emit_at(buf, count, "%s ",
516 : POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT[i]);
517 : }
518 : }
519 :
520 0 : if (!match) {
521 0 : dev_warn(dev, "driver reporting unsupported charge behaviour\n");
522 0 : return -EINVAL;
523 : }
524 :
525 0 : if (count)
526 0 : buf[count - 1] = '\n';
527 :
528 : return count;
529 : }
530 : EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_show);
531 :
532 0 : int power_supply_charge_behaviour_parse(unsigned int available_behaviours, const char *buf)
533 : {
534 0 : int i = sysfs_match_string(POWER_SUPPLY_CHARGE_BEHAVIOUR_TEXT, buf);
535 :
536 0 : if (i < 0)
537 : return i;
538 :
539 0 : if (available_behaviours & BIT(i))
540 : return i;
541 :
542 0 : return -EINVAL;
543 : }
544 : EXPORT_SYMBOL_GPL(power_supply_charge_behaviour_parse);
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