Commit | Line | Data |
---|---|---|
fb972873 DW |
1 | /* |
2 | * Battery driver for One Laptop Per Child board. | |
3 | * | |
4 | * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
04a820ea | 11 | #include <linux/kernel.h> |
fb972873 | 12 | #include <linux/module.h> |
144bbeae | 13 | #include <linux/types.h> |
fb972873 | 14 | #include <linux/err.h> |
144bbeae | 15 | #include <linux/device.h> |
fb972873 DW |
16 | #include <linux/platform_device.h> |
17 | #include <linux/power_supply.h> | |
18 | #include <linux/jiffies.h> | |
19 | #include <linux/sched.h> | |
20 | #include <asm/olpc.h> | |
21 | ||
22 | ||
23 | #define EC_BAT_VOLTAGE 0x10 /* uint16_t, *9.76/32, mV */ | |
24 | #define EC_BAT_CURRENT 0x11 /* int16_t, *15.625/120, mA */ | |
75d88079 | 25 | #define EC_BAT_ACR 0x12 /* int16_t, *6250/15, µAh */ |
fb972873 DW |
26 | #define EC_BAT_TEMP 0x13 /* uint16_t, *100/256, °C */ |
27 | #define EC_AMB_TEMP 0x14 /* uint16_t, *100/256, °C */ | |
28 | #define EC_BAT_STATUS 0x15 /* uint8_t, bitmask */ | |
29 | #define EC_BAT_SOC 0x16 /* uint8_t, percentage */ | |
30 | #define EC_BAT_SERIAL 0x17 /* uint8_t[6] */ | |
31 | #define EC_BAT_EEPROM 0x18 /* uint8_t adr as input, uint8_t output */ | |
32 | #define EC_BAT_ERRCODE 0x1f /* uint8_t, bitmask */ | |
33 | ||
34 | #define BAT_STAT_PRESENT 0x01 | |
35 | #define BAT_STAT_FULL 0x02 | |
36 | #define BAT_STAT_LOW 0x04 | |
37 | #define BAT_STAT_DESTROY 0x08 | |
38 | #define BAT_STAT_AC 0x10 | |
39 | #define BAT_STAT_CHARGING 0x20 | |
40 | #define BAT_STAT_DISCHARGING 0x40 | |
8f7e5798 | 41 | #define BAT_STAT_TRICKLE 0x80 |
fb972873 DW |
42 | |
43 | #define BAT_ERR_INFOFAIL 0x02 | |
44 | #define BAT_ERR_OVERVOLTAGE 0x04 | |
45 | #define BAT_ERR_OVERTEMP 0x05 | |
46 | #define BAT_ERR_GAUGESTOP 0x06 | |
47 | #define BAT_ERR_OUT_OF_CONTROL 0x07 | |
48 | #define BAT_ERR_ID_FAIL 0x09 | |
49 | #define BAT_ERR_ACR_FAIL 0x10 | |
50 | ||
51 | #define BAT_ADDR_MFR_TYPE 0x5F | |
52 | ||
53 | /********************************************************************* | |
54 | * Power | |
55 | *********************************************************************/ | |
56 | ||
57 | static int olpc_ac_get_prop(struct power_supply *psy, | |
58 | enum power_supply_property psp, | |
59 | union power_supply_propval *val) | |
60 | { | |
61 | int ret = 0; | |
62 | uint8_t status; | |
63 | ||
64 | switch (psp) { | |
65 | case POWER_SUPPLY_PROP_ONLINE: | |
66 | ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); | |
67 | if (ret) | |
68 | return ret; | |
69 | ||
70 | val->intval = !!(status & BAT_STAT_AC); | |
71 | break; | |
72 | default: | |
73 | ret = -EINVAL; | |
74 | break; | |
75 | } | |
76 | return ret; | |
77 | } | |
78 | ||
79 | static enum power_supply_property olpc_ac_props[] = { | |
80 | POWER_SUPPLY_PROP_ONLINE, | |
81 | }; | |
82 | ||
83 | static struct power_supply olpc_ac = { | |
84 | .name = "olpc-ac", | |
85 | .type = POWER_SUPPLY_TYPE_MAINS, | |
86 | .properties = olpc_ac_props, | |
87 | .num_properties = ARRAY_SIZE(olpc_ac_props), | |
88 | .get_property = olpc_ac_get_prop, | |
89 | }; | |
90 | ||
1ca5b9d2 DW |
91 | static char bat_serial[17]; /* Ick */ |
92 | ||
b2bd8a3b AS |
93 | static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte) |
94 | { | |
95 | if (olpc_platform_info.ecver > 0x44) { | |
8f7e5798 | 96 | if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE)) |
b2bd8a3b AS |
97 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
98 | else if (ec_byte & BAT_STAT_DISCHARGING) | |
99 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
100 | else if (ec_byte & BAT_STAT_FULL) | |
101 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
102 | else /* er,... */ | |
103 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
104 | } else { | |
105 | /* Older EC didn't report charge/discharge bits */ | |
106 | if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */ | |
107 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
108 | else if (ec_byte & BAT_STAT_FULL) | |
109 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
110 | else /* Not _necessarily_ true but EC doesn't tell all yet */ | |
111 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
112 | } | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | static int olpc_bat_get_health(union power_supply_propval *val) | |
118 | { | |
119 | uint8_t ec_byte; | |
120 | int ret; | |
121 | ||
122 | ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); | |
123 | if (ret) | |
124 | return ret; | |
125 | ||
126 | switch (ec_byte) { | |
127 | case 0: | |
128 | val->intval = POWER_SUPPLY_HEALTH_GOOD; | |
129 | break; | |
130 | ||
131 | case BAT_ERR_OVERTEMP: | |
132 | val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
133 | break; | |
134 | ||
135 | case BAT_ERR_OVERVOLTAGE: | |
136 | val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
137 | break; | |
138 | ||
139 | case BAT_ERR_INFOFAIL: | |
140 | case BAT_ERR_OUT_OF_CONTROL: | |
141 | case BAT_ERR_ID_FAIL: | |
142 | case BAT_ERR_ACR_FAIL: | |
143 | val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; | |
144 | break; | |
145 | ||
146 | default: | |
147 | /* Eep. We don't know this failure code */ | |
148 | ret = -EIO; | |
149 | } | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
154 | static int olpc_bat_get_mfr(union power_supply_propval *val) | |
155 | { | |
156 | uint8_t ec_byte; | |
157 | int ret; | |
158 | ||
159 | ec_byte = BAT_ADDR_MFR_TYPE; | |
160 | ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); | |
161 | if (ret) | |
162 | return ret; | |
163 | ||
164 | switch (ec_byte >> 4) { | |
165 | case 1: | |
166 | val->strval = "Gold Peak"; | |
167 | break; | |
168 | case 2: | |
169 | val->strval = "BYD"; | |
170 | break; | |
171 | default: | |
172 | val->strval = "Unknown"; | |
173 | break; | |
174 | } | |
175 | ||
176 | return ret; | |
177 | } | |
178 | ||
179 | static int olpc_bat_get_tech(union power_supply_propval *val) | |
180 | { | |
181 | uint8_t ec_byte; | |
182 | int ret; | |
183 | ||
184 | ec_byte = BAT_ADDR_MFR_TYPE; | |
185 | ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1); | |
186 | if (ret) | |
187 | return ret; | |
188 | ||
189 | switch (ec_byte & 0xf) { | |
190 | case 1: | |
191 | val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH; | |
192 | break; | |
193 | case 2: | |
194 | val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe; | |
195 | break; | |
196 | default: | |
197 | val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
198 | break; | |
199 | } | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
fb972873 DW |
204 | /********************************************************************* |
205 | * Battery properties | |
206 | *********************************************************************/ | |
207 | static int olpc_bat_get_property(struct power_supply *psy, | |
208 | enum power_supply_property psp, | |
209 | union power_supply_propval *val) | |
210 | { | |
211 | int ret = 0; | |
8e9c7716 | 212 | __be16 ec_word; |
fb972873 | 213 | uint8_t ec_byte; |
8e9c7716 | 214 | __be64 ser_buf; |
fb972873 DW |
215 | |
216 | ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1); | |
217 | if (ret) | |
218 | return ret; | |
219 | ||
220 | /* Theoretically there's a race here -- the battery could be | |
221 | removed immediately after we check whether it's present, and | |
222 | then we query for some other property of the now-absent battery. | |
223 | It doesn't matter though -- the EC will return the last-known | |
224 | information, and it's as if we just ran that _little_ bit faster | |
225 | and managed to read it out before the battery went away. */ | |
8f7e5798 AS |
226 | if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) && |
227 | psp != POWER_SUPPLY_PROP_PRESENT) | |
fb972873 DW |
228 | return -ENODEV; |
229 | ||
230 | switch (psp) { | |
231 | case POWER_SUPPLY_PROP_STATUS: | |
b2bd8a3b AS |
232 | ret = olpc_bat_get_status(val, ec_byte); |
233 | if (ret) | |
234 | return ret; | |
235 | break; | |
ee8076ed AS |
236 | case POWER_SUPPLY_PROP_CHARGE_TYPE: |
237 | if (ec_byte & BAT_STAT_TRICKLE) | |
238 | val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; | |
239 | else if (ec_byte & BAT_STAT_CHARGING) | |
240 | val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; | |
241 | else | |
242 | val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; | |
243 | break; | |
fb972873 | 244 | case POWER_SUPPLY_PROP_PRESENT: |
8f7e5798 AS |
245 | val->intval = !!(ec_byte & (BAT_STAT_PRESENT | |
246 | BAT_STAT_TRICKLE)); | |
fb972873 DW |
247 | break; |
248 | ||
249 | case POWER_SUPPLY_PROP_HEALTH: | |
250 | if (ec_byte & BAT_STAT_DESTROY) | |
251 | val->intval = POWER_SUPPLY_HEALTH_DEAD; | |
252 | else { | |
b2bd8a3b | 253 | ret = olpc_bat_get_health(val); |
fb972873 DW |
254 | if (ret) |
255 | return ret; | |
fb972873 DW |
256 | } |
257 | break; | |
258 | ||
259 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
b2bd8a3b | 260 | ret = olpc_bat_get_mfr(val); |
fb972873 DW |
261 | if (ret) |
262 | return ret; | |
fb972873 DW |
263 | break; |
264 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
b2bd8a3b | 265 | ret = olpc_bat_get_tech(val); |
fb972873 DW |
266 | if (ret) |
267 | return ret; | |
fb972873 DW |
268 | break; |
269 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
270 | ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2); | |
271 | if (ret) | |
272 | return ret; | |
273 | ||
8e9c7716 | 274 | val->intval = (int)be16_to_cpu(ec_word) * 9760L / 32; |
fb972873 DW |
275 | break; |
276 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
277 | ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2); | |
278 | if (ret) | |
279 | return ret; | |
280 | ||
8e9c7716 | 281 | val->intval = (int)be16_to_cpu(ec_word) * 15625L / 120; |
fb972873 DW |
282 | break; |
283 | case POWER_SUPPLY_PROP_CAPACITY: | |
284 | ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1); | |
285 | if (ret) | |
286 | return ret; | |
287 | val->intval = ec_byte; | |
288 | break; | |
b294a290 AS |
289 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
290 | if (ec_byte & BAT_STAT_FULL) | |
291 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
292 | else if (ec_byte & BAT_STAT_LOW) | |
293 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
294 | else | |
295 | val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
296 | break; | |
fb972873 DW |
297 | case POWER_SUPPLY_PROP_TEMP: |
298 | ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2); | |
299 | if (ret) | |
300 | return ret; | |
8e9c7716 HH |
301 | |
302 | val->intval = (int)be16_to_cpu(ec_word) * 100 / 256; | |
fb972873 DW |
303 | break; |
304 | case POWER_SUPPLY_PROP_TEMP_AMBIENT: | |
305 | ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2); | |
306 | if (ret) | |
307 | return ret; | |
308 | ||
8e9c7716 | 309 | val->intval = (int)be16_to_cpu(ec_word) * 100 / 256; |
fb972873 | 310 | break; |
8e552c36 AS |
311 | case POWER_SUPPLY_PROP_CHARGE_COUNTER: |
312 | ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2); | |
313 | if (ret) | |
314 | return ret; | |
315 | ||
8e9c7716 | 316 | val->intval = (int)be16_to_cpu(ec_word) * 6250 / 15; |
8e552c36 | 317 | break; |
1ca5b9d2 DW |
318 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
319 | ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); | |
320 | if (ret) | |
321 | return ret; | |
322 | ||
323 | sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf)); | |
324 | val->strval = bat_serial; | |
325 | break; | |
fb972873 DW |
326 | default: |
327 | ret = -EINVAL; | |
328 | break; | |
329 | } | |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
334 | static enum power_supply_property olpc_bat_props[] = { | |
335 | POWER_SUPPLY_PROP_STATUS, | |
ee8076ed | 336 | POWER_SUPPLY_PROP_CHARGE_TYPE, |
fb972873 DW |
337 | POWER_SUPPLY_PROP_PRESENT, |
338 | POWER_SUPPLY_PROP_HEALTH, | |
339 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
340 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
341 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
342 | POWER_SUPPLY_PROP_CAPACITY, | |
b294a290 | 343 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
fb972873 DW |
344 | POWER_SUPPLY_PROP_TEMP, |
345 | POWER_SUPPLY_PROP_TEMP_AMBIENT, | |
346 | POWER_SUPPLY_PROP_MANUFACTURER, | |
1ca5b9d2 | 347 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
8e552c36 | 348 | POWER_SUPPLY_PROP_CHARGE_COUNTER, |
fb972873 DW |
349 | }; |
350 | ||
d7eb9e36 AS |
351 | /* EEPROM reading goes completely around the power_supply API, sadly */ |
352 | ||
353 | #define EEPROM_START 0x20 | |
354 | #define EEPROM_END 0x80 | |
355 | #define EEPROM_SIZE (EEPROM_END - EEPROM_START) | |
356 | ||
357 | static ssize_t olpc_bat_eeprom_read(struct kobject *kobj, | |
358 | struct bin_attribute *attr, char *buf, loff_t off, size_t count) | |
359 | { | |
360 | uint8_t ec_byte; | |
04a820ea AS |
361 | int ret; |
362 | int i; | |
d7eb9e36 AS |
363 | |
364 | if (off >= EEPROM_SIZE) | |
365 | return 0; | |
366 | if (off + count > EEPROM_SIZE) | |
367 | count = EEPROM_SIZE - off; | |
368 | ||
04a820ea AS |
369 | for (i = 0; i < count; i++) { |
370 | ec_byte = EEPROM_START + off + i; | |
371 | ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1); | |
d7eb9e36 | 372 | if (ret) { |
04a820ea AS |
373 | pr_err("olpc-battery: " |
374 | "EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n", | |
375 | ec_byte, ret); | |
d7eb9e36 AS |
376 | return -EIO; |
377 | } | |
378 | } | |
379 | ||
380 | return count; | |
381 | } | |
382 | ||
383 | static struct bin_attribute olpc_bat_eeprom = { | |
384 | .attr = { | |
385 | .name = "eeprom", | |
386 | .mode = S_IRUGO, | |
387 | .owner = THIS_MODULE, | |
388 | }, | |
389 | .size = 0, | |
390 | .read = olpc_bat_eeprom_read, | |
391 | }; | |
392 | ||
144bbeae AS |
393 | /* Allow userspace to see the specific error value pulled from the EC */ |
394 | ||
395 | static ssize_t olpc_bat_error_read(struct device *dev, | |
396 | struct device_attribute *attr, char *buf) | |
397 | { | |
398 | uint8_t ec_byte; | |
399 | ssize_t ret; | |
400 | ||
401 | ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); | |
402 | if (ret < 0) | |
403 | return ret; | |
404 | ||
405 | return sprintf(buf, "%d\n", ec_byte); | |
406 | } | |
407 | ||
408 | static struct device_attribute olpc_bat_error = { | |
409 | .attr = { | |
410 | .name = "error", | |
411 | .mode = S_IRUGO, | |
412 | }, | |
413 | .show = olpc_bat_error_read, | |
414 | }; | |
415 | ||
fb972873 DW |
416 | /********************************************************************* |
417 | * Initialisation | |
418 | *********************************************************************/ | |
419 | ||
420 | static struct platform_device *bat_pdev; | |
421 | ||
422 | static struct power_supply olpc_bat = { | |
423 | .properties = olpc_bat_props, | |
424 | .num_properties = ARRAY_SIZE(olpc_bat_props), | |
425 | .get_property = olpc_bat_get_property, | |
426 | .use_for_apm = 1, | |
427 | }; | |
428 | ||
429 | void olpc_battery_trigger_uevent(unsigned long cause) | |
430 | { | |
431 | if (cause & EC_SCI_SRC_ACPWR) | |
432 | kobject_uevent(&olpc_ac.dev->kobj, KOBJ_CHANGE); | |
433 | if (cause & (EC_SCI_SRC_BATERR|EC_SCI_SRC_BATSOC|EC_SCI_SRC_BATTERY)) | |
434 | kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE); | |
435 | } | |
436 | ||
437 | static int __init olpc_bat_init(void) | |
438 | { | |
439 | int ret = 0; | |
440 | uint8_t status; | |
441 | ||
442 | if (!olpc_platform_info.ecver) | |
443 | return -ENXIO; | |
484d6d50 AS |
444 | |
445 | /* | |
446 | * We've seen a number of EC protocol changes; this driver requires | |
447 | * the latest EC protocol, supported by 0x44 and above. | |
448 | */ | |
449 | if (olpc_platform_info.ecver < 0x44) { | |
450 | printk(KERN_NOTICE "OLPC EC version 0x%02x too old for " | |
451 | "battery driver.\n", olpc_platform_info.ecver); | |
fb972873 DW |
452 | return -ENXIO; |
453 | } | |
454 | ||
455 | ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1); | |
456 | if (ret) | |
457 | return ret; | |
458 | ||
459 | /* Ignore the status. It doesn't actually matter */ | |
460 | ||
461 | bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0); | |
462 | if (IS_ERR(bat_pdev)) | |
463 | return PTR_ERR(bat_pdev); | |
464 | ||
465 | ret = power_supply_register(&bat_pdev->dev, &olpc_ac); | |
466 | if (ret) | |
467 | goto ac_failed; | |
468 | ||
469 | olpc_bat.name = bat_pdev->name; | |
470 | ||
471 | ret = power_supply_register(&bat_pdev->dev, &olpc_bat); | |
472 | if (ret) | |
473 | goto battery_failed; | |
474 | ||
d7eb9e36 AS |
475 | ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom); |
476 | if (ret) | |
477 | goto eeprom_failed; | |
478 | ||
144bbeae AS |
479 | ret = device_create_file(olpc_bat.dev, &olpc_bat_error); |
480 | if (ret) | |
481 | goto error_failed; | |
482 | ||
fb972873 DW |
483 | goto success; |
484 | ||
144bbeae AS |
485 | error_failed: |
486 | device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); | |
d7eb9e36 AS |
487 | eeprom_failed: |
488 | power_supply_unregister(&olpc_bat); | |
fb972873 DW |
489 | battery_failed: |
490 | power_supply_unregister(&olpc_ac); | |
491 | ac_failed: | |
492 | platform_device_unregister(bat_pdev); | |
493 | success: | |
494 | return ret; | |
495 | } | |
496 | ||
497 | static void __exit olpc_bat_exit(void) | |
498 | { | |
144bbeae | 499 | device_remove_file(olpc_bat.dev, &olpc_bat_error); |
d7eb9e36 | 500 | device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); |
fb972873 DW |
501 | power_supply_unregister(&olpc_bat); |
502 | power_supply_unregister(&olpc_ac); | |
503 | platform_device_unregister(bat_pdev); | |
fb972873 DW |
504 | } |
505 | ||
506 | module_init(olpc_bat_init); | |
507 | module_exit(olpc_bat_exit); | |
508 | ||
509 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
510 | MODULE_LICENSE("GPL"); | |
511 | MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine"); |