Commit | Line | Data |
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b996ad0e RG |
1 | /* |
2 | * BQ27x00 battery driver | |
3 | * | |
4 | * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> | |
5 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> | |
7fb7ba58 | 6 | * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de> |
73c244a8 | 7 | * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com> |
b996ad0e RG |
8 | * |
9 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. | |
10 | * | |
11 | * This package is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | * | |
19 | */ | |
631c17ee PR |
20 | |
21 | /* | |
22 | * Datasheets: | |
23 | * http://focus.ti.com/docs/prod/folders/print/bq27000.html | |
24 | * http://focus.ti.com/docs/prod/folders/print/bq27500.html | |
a66f59ba | 25 | * http://www.ti.com/product/bq27425-g1 |
631c17ee PR |
26 | */ |
27 | ||
b996ad0e RG |
28 | #include <linux/module.h> |
29 | #include <linux/param.h> | |
30 | #include <linux/jiffies.h> | |
31 | #include <linux/workqueue.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/platform_device.h> | |
34 | #include <linux/power_supply.h> | |
35 | #include <linux/idr.h> | |
b996ad0e | 36 | #include <linux/i2c.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
8aef7e8f | 38 | #include <asm/unaligned.h> |
b996ad0e | 39 | |
7fb7ba58 LPC |
40 | #include <linux/power/bq27x00_battery.h> |
41 | ||
631c17ee | 42 | #define DRIVER_VERSION "1.2.0" |
b996ad0e RG |
43 | |
44 | #define BQ27x00_REG_TEMP 0x06 | |
45 | #define BQ27x00_REG_VOLT 0x08 | |
b996ad0e RG |
46 | #define BQ27x00_REG_AI 0x14 |
47 | #define BQ27x00_REG_FLAGS 0x0A | |
4e924a81 GI |
48 | #define BQ27x00_REG_TTE 0x16 |
49 | #define BQ27x00_REG_TTF 0x18 | |
50 | #define BQ27x00_REG_TTECP 0x26 | |
202e0116 | 51 | #define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */ |
631c17ee PR |
52 | #define BQ27x00_REG_LMD 0x12 /* Last measured discharge */ |
53 | #define BQ27x00_REG_CYCT 0x2A /* Cycle count total */ | |
202e0116 | 54 | #define BQ27x00_REG_AE 0x22 /* Available energy */ |
9903e627 | 55 | #define BQ27x00_POWER_AVG 0x24 |
b996ad0e | 56 | |
e20908d9 | 57 | #define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */ |
631c17ee | 58 | #define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */ |
d66bab3f PR |
59 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
60 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
4b226c2c | 61 | #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ |
c1b9ab67 | 62 | #define BQ27000_FLAG_FC BIT(5) |
d66bab3f | 63 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ |
e20908d9 | 64 | |
bf7d4140 | 65 | #define BQ27500_REG_SOC 0x2C |
631c17ee | 66 | #define BQ27500_REG_DCAP 0x3C /* Design capacity */ |
b7aaacf5 | 67 | #define BQ27500_FLAG_DSC BIT(0) |
d66bab3f PR |
68 | #define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ |
69 | #define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
b7aaacf5 | 70 | #define BQ27500_FLAG_FC BIT(9) |
9903e627 | 71 | #define BQ27500_FLAG_OTC BIT(15) |
e20908d9 | 72 | |
a66f59ba SG |
73 | /* bq27425 register addresses are same as bq27x00 addresses minus 4 */ |
74 | #define BQ27425_REG_OFFSET 0x04 | |
75 | #define BQ27425_REG_SOC 0x18 /* Register address plus offset */ | |
76 | ||
a2e5118c | 77 | #define BQ27000_RS 20 /* Resistor sense */ |
9903e627 | 78 | #define BQ27x00_POWER_CONSTANT (256 * 29200 / 1000) |
a2e5118c | 79 | |
b996ad0e RG |
80 | struct bq27x00_device_info; |
81 | struct bq27x00_access_methods { | |
297a533b | 82 | int (*read)(struct bq27x00_device_info *di, u8 reg, bool single); |
b996ad0e RG |
83 | }; |
84 | ||
a66f59ba | 85 | enum bq27x00_chip { BQ27000, BQ27500, BQ27425}; |
e20908d9 | 86 | |
297a533b LPC |
87 | struct bq27x00_reg_cache { |
88 | int temperature; | |
89 | int time_to_empty; | |
90 | int time_to_empty_avg; | |
91 | int time_to_full; | |
631c17ee | 92 | int charge_full; |
73c244a8 | 93 | int cycle_count; |
297a533b | 94 | int capacity; |
a8f6bd23 | 95 | int energy; |
297a533b | 96 | int flags; |
9903e627 SR |
97 | int power_avg; |
98 | int health; | |
297a533b LPC |
99 | }; |
100 | ||
b996ad0e RG |
101 | struct bq27x00_device_info { |
102 | struct device *dev; | |
103 | int id; | |
e20908d9 | 104 | enum bq27x00_chip chip; |
b996ad0e | 105 | |
297a533b | 106 | struct bq27x00_reg_cache cache; |
631c17ee PR |
107 | int charge_design_full; |
108 | ||
297a533b | 109 | unsigned long last_update; |
740b755a | 110 | struct delayed_work work; |
297a533b | 111 | |
a40402ef LPC |
112 | struct power_supply bat; |
113 | ||
114 | struct bq27x00_access_methods bus; | |
740b755a LPC |
115 | |
116 | struct mutex lock; | |
b996ad0e RG |
117 | }; |
118 | ||
119 | static enum power_supply_property bq27x00_battery_props[] = { | |
4e924a81 | 120 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
121 | POWER_SUPPLY_PROP_PRESENT, |
122 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
123 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
124 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 125 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 126 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
127 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
128 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
129 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 130 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
131 | POWER_SUPPLY_PROP_CHARGE_FULL, |
132 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
133 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 134 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 135 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
136 | POWER_SUPPLY_PROP_POWER_AVG, |
137 | POWER_SUPPLY_PROP_HEALTH, | |
b996ad0e RG |
138 | }; |
139 | ||
a66f59ba SG |
140 | static enum power_supply_property bq27425_battery_props[] = { |
141 | POWER_SUPPLY_PROP_STATUS, | |
142 | POWER_SUPPLY_PROP_PRESENT, | |
143 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
144 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
145 | POWER_SUPPLY_PROP_CAPACITY, | |
146 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
147 | POWER_SUPPLY_PROP_TEMP, | |
148 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
149 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
150 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
151 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
152 | }; | |
153 | ||
740b755a LPC |
154 | static unsigned int poll_interval = 360; |
155 | module_param(poll_interval, uint, 0644); | |
156 | MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \ | |
157 | "0 disables polling"); | |
158 | ||
b996ad0e RG |
159 | /* |
160 | * Common code for BQ27x00 devices | |
161 | */ | |
162 | ||
a40402ef | 163 | static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg, |
297a533b | 164 | bool single) |
b996ad0e | 165 | { |
a66f59ba SG |
166 | if (di->chip == BQ27425) |
167 | return di->bus.read(di, reg - BQ27425_REG_OFFSET, single); | |
297a533b | 168 | return di->bus.read(di, reg, single); |
b996ad0e RG |
169 | } |
170 | ||
a66f59ba SG |
171 | /* |
172 | * Higher versions of the chip like BQ27425 and BQ27500 | |
173 | * differ from BQ27000 and BQ27200 in calculation of certain | |
174 | * parameters. Hence we need to check for the chip type. | |
175 | */ | |
176 | static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di) | |
177 | { | |
178 | if (di->chip == BQ27425 || di->chip == BQ27500) | |
179 | return true; | |
180 | return false; | |
181 | } | |
182 | ||
b996ad0e | 183 | /* |
297a533b | 184 | * Return the battery Relative State-of-Charge |
b996ad0e RG |
185 | * Or < 0 if something fails. |
186 | */ | |
297a533b | 187 | static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di) |
b996ad0e | 188 | { |
297a533b | 189 | int rsoc; |
b996ad0e | 190 | |
e20908d9 | 191 | if (di->chip == BQ27500) |
297a533b | 192 | rsoc = bq27x00_read(di, BQ27500_REG_SOC, false); |
a66f59ba SG |
193 | else if (di->chip == BQ27425) |
194 | rsoc = bq27x00_read(di, BQ27425_REG_SOC, false); | |
e20908d9 | 195 | else |
297a533b LPC |
196 | rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true); |
197 | ||
198 | if (rsoc < 0) | |
c6cd4f26 | 199 | dev_dbg(di->dev, "error reading relative State-of-Charge\n"); |
297a533b LPC |
200 | |
201 | return rsoc; | |
b996ad0e RG |
202 | } |
203 | ||
631c17ee PR |
204 | /* |
205 | * Return a battery charge value in µAh | |
206 | * Or < 0 if something fails. | |
207 | */ | |
208 | static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg) | |
209 | { | |
210 | int charge; | |
211 | ||
212 | charge = bq27x00_read(di, reg, false); | |
213 | if (charge < 0) { | |
c6cd4f26 PR |
214 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
215 | reg, charge); | |
631c17ee PR |
216 | return charge; |
217 | } | |
218 | ||
a66f59ba | 219 | if (bq27xxx_is_chip_version_higher(di)) |
631c17ee PR |
220 | charge *= 1000; |
221 | else | |
222 | charge = charge * 3570 / BQ27000_RS; | |
223 | ||
224 | return charge; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Return the battery Nominal available capaciy in µAh | |
229 | * Or < 0 if something fails. | |
230 | */ | |
231 | static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di) | |
232 | { | |
e59ec4a1 PR |
233 | int flags; |
234 | bool is_bq27500 = di->chip == BQ27500; | |
235 | bool is_higher = bq27xxx_is_chip_version_higher(di); | |
236 | ||
237 | flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); | |
238 | if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI)) | |
239 | return -ENODATA; | |
240 | ||
631c17ee PR |
241 | return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC); |
242 | } | |
243 | ||
244 | /* | |
245 | * Return the battery Last measured discharge in µAh | |
246 | * Or < 0 if something fails. | |
247 | */ | |
248 | static inline int bq27x00_battery_read_lmd(struct bq27x00_device_info *di) | |
249 | { | |
250 | return bq27x00_battery_read_charge(di, BQ27x00_REG_LMD); | |
251 | } | |
252 | ||
253 | /* | |
254 | * Return the battery Initial last measured discharge in µAh | |
255 | * Or < 0 if something fails. | |
256 | */ | |
257 | static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di) | |
258 | { | |
259 | int ilmd; | |
260 | ||
a66f59ba | 261 | if (bq27xxx_is_chip_version_higher(di)) |
631c17ee PR |
262 | ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false); |
263 | else | |
264 | ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true); | |
265 | ||
266 | if (ilmd < 0) { | |
c6cd4f26 | 267 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
631c17ee PR |
268 | return ilmd; |
269 | } | |
270 | ||
a66f59ba | 271 | if (bq27xxx_is_chip_version_higher(di)) |
631c17ee PR |
272 | ilmd *= 1000; |
273 | else | |
274 | ilmd = ilmd * 256 * 3570 / BQ27000_RS; | |
275 | ||
276 | return ilmd; | |
277 | } | |
278 | ||
a8f6bd23 PR |
279 | /* |
280 | * Return the battery Available energy in µWh | |
281 | * Or < 0 if something fails. | |
282 | */ | |
283 | static int bq27x00_battery_read_energy(struct bq27x00_device_info *di) | |
284 | { | |
285 | int ae; | |
286 | ||
287 | ae = bq27x00_read(di, BQ27x00_REG_AE, false); | |
288 | if (ae < 0) { | |
c6cd4f26 | 289 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
290 | return ae; |
291 | } | |
292 | ||
293 | if (di->chip == BQ27500) | |
294 | ae *= 1000; | |
295 | else | |
296 | ae = ae * 29200 / BQ27000_RS; | |
297 | ||
298 | return ae; | |
299 | } | |
300 | ||
d149e98e PR |
301 | /* |
302 | * Return the battery temperature in tenths of degree Celsius | |
303 | * Or < 0 if something fails. | |
304 | */ | |
305 | static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di) | |
306 | { | |
307 | int temp; | |
308 | ||
309 | temp = bq27x00_read(di, BQ27x00_REG_TEMP, false); | |
310 | if (temp < 0) { | |
311 | dev_err(di->dev, "error reading temperature\n"); | |
312 | return temp; | |
313 | } | |
314 | ||
a66f59ba | 315 | if (bq27xxx_is_chip_version_higher(di)) |
d149e98e PR |
316 | temp -= 2731; |
317 | else | |
318 | temp = ((temp * 5) - 5463) / 2; | |
319 | ||
320 | return temp; | |
321 | } | |
322 | ||
631c17ee PR |
323 | /* |
324 | * Return the battery Cycle count total | |
325 | * Or < 0 if something fails. | |
326 | */ | |
327 | static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di) | |
328 | { | |
329 | int cyct; | |
330 | ||
331 | cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false); | |
332 | if (cyct < 0) | |
333 | dev_err(di->dev, "error reading cycle count total\n"); | |
334 | ||
335 | return cyct; | |
336 | } | |
337 | ||
b996ad0e | 338 | /* |
297a533b LPC |
339 | * Read a time register. |
340 | * Return < 0 if something fails. | |
b996ad0e | 341 | */ |
297a533b | 342 | static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg) |
b996ad0e | 343 | { |
297a533b | 344 | int tval; |
b996ad0e | 345 | |
297a533b LPC |
346 | tval = bq27x00_read(di, reg, false); |
347 | if (tval < 0) { | |
c6cd4f26 PR |
348 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
349 | reg, tval); | |
297a533b | 350 | return tval; |
b996ad0e RG |
351 | } |
352 | ||
297a533b LPC |
353 | if (tval == 65535) |
354 | return -ENODATA; | |
355 | ||
356 | return tval * 60; | |
357 | } | |
358 | ||
9903e627 SR |
359 | /* |
360 | * Read a power avg register. | |
361 | * Return < 0 if something fails. | |
362 | */ | |
363 | static int bq27x00_battery_read_pwr_avg(struct bq27x00_device_info *di, u8 reg) | |
364 | { | |
365 | int tval; | |
366 | ||
367 | tval = bq27x00_read(di, reg, false); | |
368 | if (tval < 0) { | |
369 | dev_err(di->dev, "error reading power avg rgister %02x: %d\n", | |
370 | reg, tval); | |
371 | return tval; | |
372 | } | |
373 | ||
374 | if (di->chip == BQ27500) | |
375 | return tval; | |
376 | else | |
377 | return (tval * BQ27x00_POWER_CONSTANT) / BQ27000_RS; | |
378 | } | |
379 | ||
380 | /* | |
381 | * Read flag register. | |
382 | * Return < 0 if something fails. | |
383 | */ | |
384 | static int bq27x00_battery_read_health(struct bq27x00_device_info *di) | |
385 | { | |
386 | int tval; | |
387 | ||
388 | tval = bq27x00_read(di, BQ27x00_REG_FLAGS, false); | |
389 | if (tval < 0) { | |
390 | dev_err(di->dev, "error reading flag register:%d\n", tval); | |
391 | return tval; | |
392 | } | |
393 | ||
394 | if ((di->chip == BQ27500)) { | |
395 | if (tval & BQ27500_FLAG_SOCF) | |
396 | tval = POWER_SUPPLY_HEALTH_DEAD; | |
397 | else if (tval & BQ27500_FLAG_OTC) | |
398 | tval = POWER_SUPPLY_HEALTH_OVERHEAT; | |
399 | else | |
400 | tval = POWER_SUPPLY_HEALTH_GOOD; | |
401 | return tval; | |
402 | } else { | |
403 | if (tval & BQ27000_FLAG_EDV1) | |
404 | tval = POWER_SUPPLY_HEALTH_DEAD; | |
405 | else | |
406 | tval = POWER_SUPPLY_HEALTH_GOOD; | |
407 | return tval; | |
408 | } | |
409 | ||
410 | return -1; | |
411 | } | |
412 | ||
297a533b LPC |
413 | static void bq27x00_update(struct bq27x00_device_info *di) |
414 | { | |
415 | struct bq27x00_reg_cache cache = {0, }; | |
416 | bool is_bq27500 = di->chip == BQ27500; | |
a66f59ba | 417 | bool is_bq27425 = di->chip == BQ27425; |
297a533b | 418 | |
4d403659 | 419 | cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); |
297a533b | 420 | if (cache.flags >= 0) { |
a66f59ba SG |
421 | if (!is_bq27500 && !is_bq27425 |
422 | && (cache.flags & BQ27000_FLAG_CI)) { | |
c6cd4f26 | 423 | dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 424 | cache.capacity = -ENODATA; |
a8f6bd23 | 425 | cache.energy = -ENODATA; |
4b226c2c PR |
426 | cache.time_to_empty = -ENODATA; |
427 | cache.time_to_empty_avg = -ENODATA; | |
428 | cache.time_to_full = -ENODATA; | |
429 | cache.charge_full = -ENODATA; | |
9903e627 | 430 | cache.health = -ENODATA; |
4b226c2c PR |
431 | } else { |
432 | cache.capacity = bq27x00_battery_read_rsoc(di); | |
a66f59ba SG |
433 | if (!is_bq27425) { |
434 | cache.energy = bq27x00_battery_read_energy(di); | |
435 | cache.time_to_empty = | |
436 | bq27x00_battery_read_time(di, | |
437 | BQ27x00_REG_TTE); | |
438 | cache.time_to_empty_avg = | |
439 | bq27x00_battery_read_time(di, | |
440 | BQ27x00_REG_TTECP); | |
441 | cache.time_to_full = | |
442 | bq27x00_battery_read_time(di, | |
443 | BQ27x00_REG_TTF); | |
444 | } | |
4b226c2c | 445 | cache.charge_full = bq27x00_battery_read_lmd(di); |
9903e627 | 446 | cache.health = bq27x00_battery_read_health(di); |
4b226c2c | 447 | } |
d149e98e | 448 | cache.temperature = bq27x00_battery_read_temperature(di); |
a66f59ba SG |
449 | if (!is_bq27425) |
450 | cache.cycle_count = bq27x00_battery_read_cyct(di); | |
73c244a8 | 451 | cache.cycle_count = bq27x00_battery_read_cyct(di); |
9903e627 SR |
452 | cache.power_avg = |
453 | bq27x00_battery_read_pwr_avg(di, BQ27x00_POWER_AVG); | |
297a533b | 454 | |
631c17ee PR |
455 | /* We only have to read charge design full once */ |
456 | if (di->charge_design_full <= 0) | |
457 | di->charge_design_full = bq27x00_battery_read_ilmd(di); | |
297a533b LPC |
458 | } |
459 | ||
b68f6216 | 460 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) { |
297a533b LPC |
461 | di->cache = cache; |
462 | power_supply_changed(&di->bat); | |
463 | } | |
464 | ||
465 | di->last_update = jiffies; | |
466 | } | |
467 | ||
740b755a LPC |
468 | static void bq27x00_battery_poll(struct work_struct *work) |
469 | { | |
470 | struct bq27x00_device_info *di = | |
471 | container_of(work, struct bq27x00_device_info, work.work); | |
472 | ||
473 | bq27x00_update(di); | |
474 | ||
475 | if (poll_interval > 0) { | |
476 | /* The timer does not have to be accurate. */ | |
477 | set_timer_slack(&di->work.timer, poll_interval * HZ / 4); | |
478 | schedule_delayed_work(&di->work, poll_interval * HZ); | |
479 | } | |
480 | } | |
481 | ||
b996ad0e | 482 | /* |
bf7d4140 | 483 | * Return the battery average current in µA |
b996ad0e RG |
484 | * Note that current can be negative signed as well |
485 | * Or 0 if something fails. | |
486 | */ | |
297a533b LPC |
487 | static int bq27x00_battery_current(struct bq27x00_device_info *di, |
488 | union power_supply_propval *val) | |
b996ad0e | 489 | { |
297a533b | 490 | int curr; |
b68f6216 | 491 | int flags; |
b996ad0e | 492 | |
b68f6216 | 493 | curr = bq27x00_read(di, BQ27x00_REG_AI, false); |
c6cd4f26 PR |
494 | if (curr < 0) { |
495 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 496 | return curr; |
c6cd4f26 | 497 | } |
e20908d9 | 498 | |
a66f59ba | 499 | if (bq27xxx_is_chip_version_higher(di)) { |
e20908d9 | 500 | /* bq27500 returns signed value */ |
297a533b | 501 | val->intval = (int)((s16)curr) * 1000; |
e20908d9 | 502 | } else { |
b68f6216 PR |
503 | flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false); |
504 | if (flags & BQ27000_FLAG_CHGS) { | |
e20908d9 | 505 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 506 | curr = -curr; |
e20908d9 | 507 | } |
b996ad0e | 508 | |
297a533b | 509 | val->intval = curr * 3570 / BQ27000_RS; |
b996ad0e RG |
510 | } |
511 | ||
297a533b | 512 | return 0; |
b996ad0e RG |
513 | } |
514 | ||
4e924a81 | 515 | static int bq27x00_battery_status(struct bq27x00_device_info *di, |
297a533b | 516 | union power_supply_propval *val) |
4e924a81 | 517 | { |
4e924a81 | 518 | int status; |
4e924a81 | 519 | |
a66f59ba | 520 | if (bq27xxx_is_chip_version_higher(di)) { |
297a533b | 521 | if (di->cache.flags & BQ27500_FLAG_FC) |
4e924a81 | 522 | status = POWER_SUPPLY_STATUS_FULL; |
b7aaacf5 | 523 | else if (di->cache.flags & BQ27500_FLAG_DSC) |
4e924a81 | 524 | status = POWER_SUPPLY_STATUS_DISCHARGING; |
270968c0 | 525 | else |
b7aaacf5 | 526 | status = POWER_SUPPLY_STATUS_CHARGING; |
4e924a81 | 527 | } else { |
c1b9ab67 LPC |
528 | if (di->cache.flags & BQ27000_FLAG_FC) |
529 | status = POWER_SUPPLY_STATUS_FULL; | |
530 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 531 | status = POWER_SUPPLY_STATUS_CHARGING; |
c1b9ab67 LPC |
532 | else if (power_supply_am_i_supplied(&di->bat)) |
533 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
4e924a81 GI |
534 | else |
535 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
536 | } | |
537 | ||
538 | val->intval = status; | |
297a533b | 539 | |
4e924a81 GI |
540 | return 0; |
541 | } | |
542 | ||
d66bab3f PR |
543 | static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di, |
544 | union power_supply_propval *val) | |
545 | { | |
546 | int level; | |
547 | ||
a66f59ba | 548 | if (bq27xxx_is_chip_version_higher(di)) { |
d66bab3f PR |
549 | if (di->cache.flags & BQ27500_FLAG_FC) |
550 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
551 | else if (di->cache.flags & BQ27500_FLAG_SOC1) | |
552 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
553 | else if (di->cache.flags & BQ27500_FLAG_SOCF) | |
554 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
555 | else | |
556 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
557 | } else { | |
558 | if (di->cache.flags & BQ27000_FLAG_FC) | |
559 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; | |
560 | else if (di->cache.flags & BQ27000_FLAG_EDV1) | |
561 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; | |
562 | else if (di->cache.flags & BQ27000_FLAG_EDVF) | |
563 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; | |
564 | else | |
565 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
566 | } | |
567 | ||
568 | val->intval = level; | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
4e924a81 | 573 | /* |
91fe4d50 | 574 | * Return the battery Voltage in millivolts |
297a533b | 575 | * Or < 0 if something fails. |
4e924a81 | 576 | */ |
297a533b LPC |
577 | static int bq27x00_battery_voltage(struct bq27x00_device_info *di, |
578 | union power_supply_propval *val) | |
4e924a81 | 579 | { |
297a533b | 580 | int volt; |
4e924a81 | 581 | |
297a533b | 582 | volt = bq27x00_read(di, BQ27x00_REG_VOLT, false); |
c6cd4f26 PR |
583 | if (volt < 0) { |
584 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 585 | return volt; |
c6cd4f26 | 586 | } |
4e924a81 | 587 | |
297a533b LPC |
588 | val->intval = volt * 1000; |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int bq27x00_simple_value(int value, | |
594 | union power_supply_propval *val) | |
595 | { | |
596 | if (value < 0) | |
597 | return value; | |
598 | ||
599 | val->intval = value; | |
4e924a81 | 600 | |
4e924a81 GI |
601 | return 0; |
602 | } | |
603 | ||
b996ad0e RG |
604 | #define to_bq27x00_device_info(x) container_of((x), \ |
605 | struct bq27x00_device_info, bat); | |
606 | ||
607 | static int bq27x00_battery_get_property(struct power_supply *psy, | |
608 | enum power_supply_property psp, | |
609 | union power_supply_propval *val) | |
610 | { | |
4e924a81 | 611 | int ret = 0; |
b996ad0e | 612 | struct bq27x00_device_info *di = to_bq27x00_device_info(psy); |
3413b4ea | 613 | |
740b755a LPC |
614 | mutex_lock(&di->lock); |
615 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
616 | cancel_delayed_work_sync(&di->work); | |
617 | bq27x00_battery_poll(&di->work.work); | |
618 | } | |
619 | mutex_unlock(&di->lock); | |
297a533b LPC |
620 | |
621 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 622 | return -ENODEV; |
b996ad0e RG |
623 | |
624 | switch (psp) { | |
4e924a81 GI |
625 | case POWER_SUPPLY_PROP_STATUS: |
626 | ret = bq27x00_battery_status(di, val); | |
627 | break; | |
b996ad0e | 628 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
297a533b | 629 | ret = bq27x00_battery_voltage(di, val); |
3413b4ea | 630 | break; |
b996ad0e | 631 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 632 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
633 | break; |
634 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
297a533b | 635 | ret = bq27x00_battery_current(di, val); |
b996ad0e RG |
636 | break; |
637 | case POWER_SUPPLY_PROP_CAPACITY: | |
297a533b | 638 | ret = bq27x00_simple_value(di->cache.capacity, val); |
b996ad0e | 639 | break; |
d66bab3f PR |
640 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
641 | ret = bq27x00_battery_capacity_level(di, val); | |
642 | break; | |
b996ad0e | 643 | case POWER_SUPPLY_PROP_TEMP: |
d149e98e | 644 | ret = bq27x00_simple_value(di->cache.temperature, val); |
b996ad0e | 645 | break; |
4e924a81 | 646 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
297a533b | 647 | ret = bq27x00_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
648 | break; |
649 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
297a533b | 650 | ret = bq27x00_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
651 | break; |
652 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
297a533b | 653 | ret = bq27x00_simple_value(di->cache.time_to_full, val); |
4e924a81 | 654 | break; |
5661f334 LPC |
655 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
656 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
657 | break; | |
631c17ee PR |
658 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
659 | ret = bq27x00_simple_value(bq27x00_battery_read_nac(di), val); | |
660 | break; | |
661 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
662 | ret = bq27x00_simple_value(di->cache.charge_full, val); | |
663 | break; | |
664 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
665 | ret = bq27x00_simple_value(di->charge_design_full, val); | |
666 | break; | |
73c244a8 PR |
667 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
668 | ret = bq27x00_simple_value(di->cache.cycle_count, val); | |
631c17ee PR |
669 | break; |
670 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a8f6bd23 | 671 | ret = bq27x00_simple_value(di->cache.energy, val); |
631c17ee | 672 | break; |
9903e627 SR |
673 | case POWER_SUPPLY_PROP_POWER_AVG: |
674 | ret = bq27x00_simple_value(di->cache.power_avg, val); | |
675 | break; | |
676 | case POWER_SUPPLY_PROP_HEALTH: | |
677 | ret = bq27x00_simple_value(di->cache.health, val); | |
678 | break; | |
b996ad0e RG |
679 | default: |
680 | return -EINVAL; | |
681 | } | |
682 | ||
4e924a81 | 683 | return ret; |
b996ad0e RG |
684 | } |
685 | ||
740b755a LPC |
686 | static void bq27x00_external_power_changed(struct power_supply *psy) |
687 | { | |
688 | struct bq27x00_device_info *di = to_bq27x00_device_info(psy); | |
689 | ||
690 | cancel_delayed_work_sync(&di->work); | |
691 | schedule_delayed_work(&di->work, 0); | |
692 | } | |
693 | ||
a40402ef | 694 | static int bq27x00_powersupply_init(struct bq27x00_device_info *di) |
b996ad0e | 695 | { |
a40402ef LPC |
696 | int ret; |
697 | ||
b996ad0e | 698 | di->bat.type = POWER_SUPPLY_TYPE_BATTERY; |
a66f59ba SG |
699 | di->chip = BQ27425; |
700 | if (di->chip == BQ27425) { | |
701 | di->bat.properties = bq27425_battery_props; | |
702 | di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props); | |
703 | } else { | |
704 | di->bat.properties = bq27x00_battery_props; | |
705 | di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props); | |
706 | } | |
b996ad0e | 707 | di->bat.get_property = bq27x00_battery_get_property; |
740b755a LPC |
708 | di->bat.external_power_changed = bq27x00_external_power_changed; |
709 | ||
710 | INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll); | |
711 | mutex_init(&di->lock); | |
a40402ef LPC |
712 | |
713 | ret = power_supply_register(di->dev, &di->bat); | |
714 | if (ret) { | |
715 | dev_err(di->dev, "failed to register battery: %d\n", ret); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
720 | ||
297a533b LPC |
721 | bq27x00_update(di); |
722 | ||
a40402ef | 723 | return 0; |
b996ad0e RG |
724 | } |
725 | ||
740b755a LPC |
726 | static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di) |
727 | { | |
8cfaaa81 PR |
728 | /* |
729 | * power_supply_unregister call bq27x00_battery_get_property which | |
730 | * call bq27x00_battery_poll. | |
731 | * Make sure that bq27x00_battery_poll will not call | |
732 | * schedule_delayed_work again after unregister (which cause OOPS). | |
733 | */ | |
734 | poll_interval = 0; | |
735 | ||
740b755a LPC |
736 | cancel_delayed_work_sync(&di->work); |
737 | ||
738 | power_supply_unregister(&di->bat); | |
739 | ||
740 | mutex_destroy(&di->lock); | |
741 | } | |
742 | ||
7fb7ba58 LPC |
743 | |
744 | /* i2c specific code */ | |
745 | #ifdef CONFIG_BATTERY_BQ27X00_I2C | |
746 | ||
747 | /* If the system has several batteries we need a different name for each | |
748 | * of them... | |
b996ad0e | 749 | */ |
7fb7ba58 LPC |
750 | static DEFINE_IDR(battery_id); |
751 | static DEFINE_MUTEX(battery_mutex); | |
b996ad0e | 752 | |
297a533b | 753 | static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single) |
b996ad0e | 754 | { |
a40402ef | 755 | struct i2c_client *client = to_i2c_client(di->dev); |
9e912f45 | 756 | struct i2c_msg msg[2]; |
b996ad0e | 757 | unsigned char data[2]; |
297a533b | 758 | int ret; |
b996ad0e RG |
759 | |
760 | if (!client->adapter) | |
761 | return -ENODEV; | |
762 | ||
9e912f45 GI |
763 | msg[0].addr = client->addr; |
764 | msg[0].flags = 0; | |
765 | msg[0].buf = ® | |
766 | msg[0].len = sizeof(reg); | |
767 | msg[1].addr = client->addr; | |
768 | msg[1].flags = I2C_M_RD; | |
769 | msg[1].buf = data; | |
2ec523a8 | 770 | if (single) |
9e912f45 | 771 | msg[1].len = 1; |
2ec523a8 | 772 | else |
9e912f45 | 773 | msg[1].len = 2; |
2ec523a8 | 774 | |
9e912f45 | 775 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
2ec523a8 LPC |
776 | if (ret < 0) |
777 | return ret; | |
778 | ||
779 | if (!single) | |
780 | ret = get_unaligned_le16(data); | |
781 | else | |
782 | ret = data[0]; | |
b996ad0e | 783 | |
297a533b | 784 | return ret; |
b996ad0e RG |
785 | } |
786 | ||
e20908d9 | 787 | static int bq27x00_battery_probe(struct i2c_client *client, |
b996ad0e RG |
788 | const struct i2c_device_id *id) |
789 | { | |
790 | char *name; | |
791 | struct bq27x00_device_info *di; | |
b996ad0e RG |
792 | int num; |
793 | int retval = 0; | |
794 | ||
795 | /* Get new ID for the new battery device */ | |
796 | retval = idr_pre_get(&battery_id, GFP_KERNEL); | |
797 | if (retval == 0) | |
798 | return -ENOMEM; | |
799 | mutex_lock(&battery_mutex); | |
800 | retval = idr_get_new(&battery_id, client, &num); | |
801 | mutex_unlock(&battery_mutex); | |
802 | if (retval < 0) | |
803 | return retval; | |
804 | ||
e20908d9 | 805 | name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); |
b996ad0e RG |
806 | if (!name) { |
807 | dev_err(&client->dev, "failed to allocate device name\n"); | |
808 | retval = -ENOMEM; | |
809 | goto batt_failed_1; | |
810 | } | |
811 | ||
812 | di = kzalloc(sizeof(*di), GFP_KERNEL); | |
813 | if (!di) { | |
814 | dev_err(&client->dev, "failed to allocate device info data\n"); | |
815 | retval = -ENOMEM; | |
816 | goto batt_failed_2; | |
817 | } | |
a40402ef | 818 | |
b996ad0e | 819 | di->id = num; |
a40402ef | 820 | di->dev = &client->dev; |
e20908d9 | 821 | di->chip = id->driver_data; |
a40402ef LPC |
822 | di->bat.name = name; |
823 | di->bus.read = &bq27x00_read_i2c; | |
b996ad0e | 824 | |
f7760995 JL |
825 | retval = bq27x00_powersupply_init(di); |
826 | if (retval) | |
b996ad0e | 827 | goto batt_failed_3; |
b996ad0e RG |
828 | |
829 | i2c_set_clientdata(client, di); | |
b996ad0e RG |
830 | |
831 | return 0; | |
832 | ||
b996ad0e RG |
833 | batt_failed_3: |
834 | kfree(di); | |
835 | batt_failed_2: | |
836 | kfree(name); | |
837 | batt_failed_1: | |
838 | mutex_lock(&battery_mutex); | |
839 | idr_remove(&battery_id, num); | |
840 | mutex_unlock(&battery_mutex); | |
841 | ||
842 | return retval; | |
843 | } | |
844 | ||
e20908d9 | 845 | static int bq27x00_battery_remove(struct i2c_client *client) |
b996ad0e RG |
846 | { |
847 | struct bq27x00_device_info *di = i2c_get_clientdata(client); | |
848 | ||
740b755a | 849 | bq27x00_powersupply_unregister(di); |
b996ad0e RG |
850 | |
851 | kfree(di->bat.name); | |
852 | ||
853 | mutex_lock(&battery_mutex); | |
854 | idr_remove(&battery_id, di->id); | |
855 | mutex_unlock(&battery_mutex); | |
856 | ||
857 | kfree(di); | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
e20908d9 GI |
862 | static const struct i2c_device_id bq27x00_id[] = { |
863 | { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */ | |
864 | { "bq27500", BQ27500 }, | |
a66f59ba | 865 | { "bq27425", BQ27425 }, |
b996ad0e RG |
866 | {}, |
867 | }; | |
fd9b958c | 868 | MODULE_DEVICE_TABLE(i2c, bq27x00_id); |
b996ad0e | 869 | |
e20908d9 | 870 | static struct i2c_driver bq27x00_battery_driver = { |
b996ad0e | 871 | .driver = { |
e20908d9 | 872 | .name = "bq27x00-battery", |
b996ad0e | 873 | }, |
e20908d9 GI |
874 | .probe = bq27x00_battery_probe, |
875 | .remove = bq27x00_battery_remove, | |
876 | .id_table = bq27x00_id, | |
b996ad0e RG |
877 | }; |
878 | ||
7fb7ba58 LPC |
879 | static inline int bq27x00_battery_i2c_init(void) |
880 | { | |
881 | int ret = i2c_add_driver(&bq27x00_battery_driver); | |
882 | if (ret) | |
883 | printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n"); | |
884 | ||
885 | return ret; | |
886 | } | |
887 | ||
888 | static inline void bq27x00_battery_i2c_exit(void) | |
889 | { | |
890 | i2c_del_driver(&bq27x00_battery_driver); | |
891 | } | |
892 | ||
893 | #else | |
894 | ||
895 | static inline int bq27x00_battery_i2c_init(void) { return 0; } | |
896 | static inline void bq27x00_battery_i2c_exit(void) {}; | |
897 | ||
898 | #endif | |
899 | ||
900 | /* platform specific code */ | |
901 | #ifdef CONFIG_BATTERY_BQ27X00_PLATFORM | |
902 | ||
903 | static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg, | |
297a533b | 904 | bool single) |
7fb7ba58 LPC |
905 | { |
906 | struct device *dev = di->dev; | |
907 | struct bq27000_platform_data *pdata = dev->platform_data; | |
908 | unsigned int timeout = 3; | |
909 | int upper, lower; | |
910 | int temp; | |
911 | ||
912 | if (!single) { | |
913 | /* Make sure the value has not changed in between reading the | |
914 | * lower and the upper part */ | |
915 | upper = pdata->read(dev, reg + 1); | |
916 | do { | |
917 | temp = upper; | |
918 | if (upper < 0) | |
919 | return upper; | |
920 | ||
921 | lower = pdata->read(dev, reg); | |
922 | if (lower < 0) | |
923 | return lower; | |
924 | ||
925 | upper = pdata->read(dev, reg + 1); | |
926 | } while (temp != upper && --timeout); | |
927 | ||
928 | if (timeout == 0) | |
929 | return -EIO; | |
930 | ||
297a533b | 931 | return (upper << 8) | lower; |
7fb7ba58 | 932 | } |
297a533b LPC |
933 | |
934 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
935 | } |
936 | ||
c8afa640 | 937 | static int bq27000_battery_probe(struct platform_device *pdev) |
7fb7ba58 LPC |
938 | { |
939 | struct bq27x00_device_info *di; | |
940 | struct bq27000_platform_data *pdata = pdev->dev.platform_data; | |
941 | int ret; | |
942 | ||
943 | if (!pdata) { | |
944 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
945 | return -EINVAL; | |
946 | } | |
947 | ||
948 | if (!pdata->read) { | |
949 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
950 | return -EINVAL; | |
951 | } | |
952 | ||
953 | di = kzalloc(sizeof(*di), GFP_KERNEL); | |
954 | if (!di) { | |
955 | dev_err(&pdev->dev, "failed to allocate device info data\n"); | |
956 | return -ENOMEM; | |
957 | } | |
958 | ||
959 | platform_set_drvdata(pdev, di); | |
960 | ||
961 | di->dev = &pdev->dev; | |
962 | di->chip = BQ27000; | |
963 | ||
964 | di->bat.name = pdata->name ?: dev_name(&pdev->dev); | |
965 | di->bus.read = &bq27000_read_platform; | |
966 | ||
967 | ret = bq27x00_powersupply_init(di); | |
968 | if (ret) | |
969 | goto err_free; | |
970 | ||
971 | return 0; | |
972 | ||
973 | err_free: | |
974 | platform_set_drvdata(pdev, NULL); | |
975 | kfree(di); | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
415ec69f | 980 | static int bq27000_battery_remove(struct platform_device *pdev) |
7fb7ba58 LPC |
981 | { |
982 | struct bq27x00_device_info *di = platform_get_drvdata(pdev); | |
983 | ||
740b755a LPC |
984 | bq27x00_powersupply_unregister(di); |
985 | ||
7fb7ba58 LPC |
986 | platform_set_drvdata(pdev, NULL); |
987 | kfree(di); | |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
992 | static struct platform_driver bq27000_battery_driver = { | |
993 | .probe = bq27000_battery_probe, | |
28ea73f4 | 994 | .remove = bq27000_battery_remove, |
7fb7ba58 LPC |
995 | .driver = { |
996 | .name = "bq27000-battery", | |
997 | .owner = THIS_MODULE, | |
998 | }, | |
999 | }; | |
1000 | ||
1001 | static inline int bq27x00_battery_platform_init(void) | |
1002 | { | |
1003 | int ret = platform_driver_register(&bq27000_battery_driver); | |
1004 | if (ret) | |
1005 | printk(KERN_ERR "Unable to register BQ27000 platform driver\n"); | |
1006 | ||
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | static inline void bq27x00_battery_platform_exit(void) | |
1011 | { | |
1012 | platform_driver_unregister(&bq27000_battery_driver); | |
1013 | } | |
1014 | ||
1015 | #else | |
1016 | ||
1017 | static inline int bq27x00_battery_platform_init(void) { return 0; } | |
1018 | static inline void bq27x00_battery_platform_exit(void) {}; | |
1019 | ||
1020 | #endif | |
1021 | ||
1022 | /* | |
1023 | * Module stuff | |
1024 | */ | |
1025 | ||
b996ad0e RG |
1026 | static int __init bq27x00_battery_init(void) |
1027 | { | |
1028 | int ret; | |
1029 | ||
7fb7ba58 LPC |
1030 | ret = bq27x00_battery_i2c_init(); |
1031 | if (ret) | |
1032 | return ret; | |
1033 | ||
1034 | ret = bq27x00_battery_platform_init(); | |
b996ad0e | 1035 | if (ret) |
7fb7ba58 | 1036 | bq27x00_battery_i2c_exit(); |
b996ad0e RG |
1037 | |
1038 | return ret; | |
1039 | } | |
1040 | module_init(bq27x00_battery_init); | |
1041 | ||
1042 | static void __exit bq27x00_battery_exit(void) | |
1043 | { | |
7fb7ba58 LPC |
1044 | bq27x00_battery_platform_exit(); |
1045 | bq27x00_battery_i2c_exit(); | |
b996ad0e RG |
1046 | } |
1047 | module_exit(bq27x00_battery_exit); | |
1048 | ||
1049 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); | |
1050 | MODULE_DESCRIPTION("BQ27x00 battery monitor driver"); | |
1051 | MODULE_LICENSE("GPL"); |