Commit | Line | Data |
---|---|---|
b996ad0e | 1 | /* |
081bab21 | 2 | * BQ27xxx battery driver |
b996ad0e RG |
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 | * | |
631c17ee | 19 | * Datasheets: |
d74534c2 AD |
20 | * http://www.ti.com/product/bq27000 |
21 | * http://www.ti.com/product/bq27200 | |
22 | * http://www.ti.com/product/bq27010 | |
23 | * http://www.ti.com/product/bq27210 | |
24 | * http://www.ti.com/product/bq27500 | |
25 | * http://www.ti.com/product/bq27510-g3 | |
26 | * http://www.ti.com/product/bq27520-g4 | |
27 | * http://www.ti.com/product/bq27530-g1 | |
28 | * http://www.ti.com/product/bq27531-g1 | |
29 | * http://www.ti.com/product/bq27541-g1 | |
30 | * http://www.ti.com/product/bq27542-g1 | |
31 | * http://www.ti.com/product/bq27546-g1 | |
32 | * http://www.ti.com/product/bq27742-g1 | |
33 | * http://www.ti.com/product/bq27545-g1 | |
34 | * http://www.ti.com/product/bq27421-g1 | |
a66f59ba | 35 | * http://www.ti.com/product/bq27425-g1 |
d74534c2 AD |
36 | * http://www.ti.com/product/bq27411-g1 |
37 | * http://www.ti.com/product/bq27621-g1 | |
631c17ee PR |
38 | */ |
39 | ||
1cb82fdb | 40 | #include <linux/device.h> |
b996ad0e RG |
41 | #include <linux/module.h> |
42 | #include <linux/param.h> | |
43 | #include <linux/jiffies.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/platform_device.h> | |
47 | #include <linux/power_supply.h> | |
48 | #include <linux/idr.h> | |
b996ad0e | 49 | #include <linux/i2c.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
8807feb9 | 51 | #include <linux/interrupt.h> |
8aef7e8f | 52 | #include <asm/unaligned.h> |
b996ad0e | 53 | |
081bab21 | 54 | #include <linux/power/bq27xxx_battery.h> |
7fb7ba58 | 55 | |
6eb207f2 | 56 | #define DRIVER_VERSION "1.2.0" |
b996ad0e | 57 | |
db04fc5c AD |
58 | #define BQ27XXX_MANUFACTURER "Texas Instruments" |
59 | ||
d74534c2 AD |
60 | /* BQ27XXX Flags */ |
61 | #define BQ27XXX_FLAG_DSC BIT(0) | |
62 | #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ | |
63 | #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
64 | #define BQ27XXX_FLAG_FC BIT(9) | |
65 | #define BQ27XXX_FLAG_OTD BIT(14) | |
66 | #define BQ27XXX_FLAG_OTC BIT(15) | |
74aab849 AD |
67 | #define BQ27XXX_FLAG_UT BIT(14) |
68 | #define BQ27XXX_FLAG_OT BIT(15) | |
d74534c2 AD |
69 | |
70 | /* BQ27000 has different layout for Flags register */ | |
6eb207f2 AD |
71 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
72 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
73 | #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ | |
74 | #define BQ27000_FLAG_FC BIT(5) | |
75 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ | |
76 | ||
d74534c2 AD |
77 | #define BQ27XXX_RS (20) /* Resistor sense mOhm */ |
78 | #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */ | |
79 | #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */ | |
a2e5118c | 80 | |
081bab21 AD |
81 | struct bq27xxx_device_info; |
82 | struct bq27xxx_access_methods { | |
83 | int (*read)(struct bq27xxx_device_info *di, u8 reg, bool single); | |
b996ad0e RG |
84 | }; |
85 | ||
d74534c2 AD |
86 | #define INVALID_REG_ADDR 0xff |
87 | ||
88 | /* | |
89 | * bq27xxx_reg_index - Register names | |
90 | * | |
91 | * These are indexes into a device's register mapping array. | |
92 | */ | |
93 | enum bq27xxx_reg_index { | |
94 | BQ27XXX_REG_CTRL = 0, /* Control */ | |
95 | BQ27XXX_REG_TEMP, /* Temperature */ | |
96 | BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ | |
97 | BQ27XXX_REG_VOLT, /* Voltage */ | |
98 | BQ27XXX_REG_AI, /* Average Current */ | |
99 | BQ27XXX_REG_FLAGS, /* Flags */ | |
100 | BQ27XXX_REG_TTE, /* Time-to-Empty */ | |
101 | BQ27XXX_REG_TTF, /* Time-to-Full */ | |
102 | BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ | |
103 | BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ | |
104 | BQ27XXX_REG_NAC, /* Nominal Available Capacity */ | |
105 | BQ27XXX_REG_FCC, /* Full Charge Capacity */ | |
106 | BQ27XXX_REG_CYCT, /* Cycle Count */ | |
107 | BQ27XXX_REG_AE, /* Available Energy */ | |
108 | BQ27XXX_REG_SOC, /* State-of-Charge */ | |
109 | BQ27XXX_REG_DCAP, /* Design Capacity */ | |
110 | BQ27XXX_REG_AP, /* Average Power */ | |
111 | }; | |
112 | ||
081bab21 | 113 | struct bq27xxx_reg_cache { |
297a533b LPC |
114 | int temperature; |
115 | int time_to_empty; | |
116 | int time_to_empty_avg; | |
117 | int time_to_full; | |
631c17ee | 118 | int charge_full; |
73c244a8 | 119 | int cycle_count; |
297a533b | 120 | int capacity; |
a8f6bd23 | 121 | int energy; |
297a533b | 122 | int flags; |
9903e627 SR |
123 | int power_avg; |
124 | int health; | |
297a533b LPC |
125 | }; |
126 | ||
081bab21 | 127 | struct bq27xxx_device_info { |
6d0a1815 | 128 | struct device *dev; |
b996ad0e | 129 | int id; |
081bab21 | 130 | enum bq27xxx_chip chip; |
b996ad0e | 131 | |
081bab21 | 132 | struct bq27xxx_reg_cache cache; |
631c17ee PR |
133 | int charge_design_full; |
134 | ||
297a533b | 135 | unsigned long last_update; |
740b755a | 136 | struct delayed_work work; |
297a533b | 137 | |
297d716f | 138 | struct power_supply *bat; |
a40402ef | 139 | |
081bab21 | 140 | struct bq27xxx_access_methods bus; |
740b755a LPC |
141 | |
142 | struct mutex lock; | |
d74534c2 AD |
143 | |
144 | u8 *regs; | |
145 | }; | |
146 | ||
147 | /* Register mappings */ | |
148 | static u8 bq27000_regs[] = { | |
149 | 0x00, /* CONTROL */ | |
150 | 0x06, /* TEMP */ | |
151 | INVALID_REG_ADDR, /* INT TEMP - NA*/ | |
152 | 0x08, /* VOLT */ | |
153 | 0x14, /* AVG CURR */ | |
154 | 0x0a, /* FLAGS */ | |
155 | 0x16, /* TTE */ | |
156 | 0x18, /* TTF */ | |
157 | 0x1c, /* TTES */ | |
158 | 0x26, /* TTECP */ | |
159 | 0x0c, /* NAC */ | |
160 | 0x12, /* LMD(FCC) */ | |
161 | 0x2a, /* CYCT */ | |
162 | 0x22, /* AE */ | |
163 | 0x0b, /* SOC(RSOC) */ | |
164 | 0x76, /* DCAP(ILMD) */ | |
165 | 0x24, /* AP */ | |
166 | }; | |
167 | ||
168 | static u8 bq27010_regs[] = { | |
169 | 0x00, /* CONTROL */ | |
170 | 0x06, /* TEMP */ | |
171 | INVALID_REG_ADDR, /* INT TEMP - NA*/ | |
172 | 0x08, /* VOLT */ | |
173 | 0x14, /* AVG CURR */ | |
174 | 0x0a, /* FLAGS */ | |
175 | 0x16, /* TTE */ | |
176 | 0x18, /* TTF */ | |
177 | 0x1c, /* TTES */ | |
178 | 0x26, /* TTECP */ | |
179 | 0x0c, /* NAC */ | |
180 | 0x12, /* LMD(FCC) */ | |
181 | 0x2a, /* CYCT */ | |
182 | INVALID_REG_ADDR, /* AE - NA */ | |
183 | 0x0b, /* SOC(RSOC) */ | |
184 | 0x76, /* DCAP(ILMD) */ | |
185 | INVALID_REG_ADDR, /* AP - NA */ | |
186 | }; | |
187 | ||
188 | static u8 bq27500_regs[] = { | |
189 | 0x00, /* CONTROL */ | |
190 | 0x06, /* TEMP */ | |
191 | 0x28, /* INT TEMP */ | |
192 | 0x08, /* VOLT */ | |
193 | 0x14, /* AVG CURR */ | |
194 | 0x0a, /* FLAGS */ | |
195 | 0x16, /* TTE */ | |
196 | INVALID_REG_ADDR, /* TTF - NA */ | |
197 | 0x1a, /* TTES */ | |
198 | INVALID_REG_ADDR, /* TTECP - NA */ | |
199 | 0x0c, /* NAC */ | |
200 | 0x12, /* LMD(FCC) */ | |
201 | 0x1e, /* CYCT */ | |
202 | INVALID_REG_ADDR, /* AE - NA */ | |
203 | 0x20, /* SOC(RSOC) */ | |
204 | 0x2e, /* DCAP(ILMD) */ | |
205 | INVALID_REG_ADDR, /* AP - NA */ | |
b996ad0e RG |
206 | }; |
207 | ||
d74534c2 AD |
208 | static u8 bq27530_regs[] = { |
209 | 0x00, /* CONTROL */ | |
210 | 0x06, /* TEMP */ | |
211 | 0x32, /* INT TEMP */ | |
212 | 0x08, /* VOLT */ | |
213 | 0x14, /* AVG CURR */ | |
214 | 0x0a, /* FLAGS */ | |
215 | 0x16, /* TTE */ | |
216 | INVALID_REG_ADDR, /* TTF - NA */ | |
217 | INVALID_REG_ADDR, /* TTES - NA */ | |
218 | INVALID_REG_ADDR, /* TTECP - NA */ | |
219 | 0x0c, /* NAC */ | |
220 | 0x12, /* LMD(FCC) */ | |
221 | 0x2a, /* CYCT */ | |
222 | INVALID_REG_ADDR, /* AE - NA */ | |
223 | 0x2c, /* SOC(RSOC) */ | |
224 | INVALID_REG_ADDR, /* DCAP - NA */ | |
225 | 0x24, /* AP */ | |
226 | }; | |
227 | ||
228 | static u8 bq27541_regs[] = { | |
229 | 0x00, /* CONTROL */ | |
230 | 0x06, /* TEMP */ | |
231 | 0x28, /* INT TEMP */ | |
232 | 0x08, /* VOLT */ | |
233 | 0x14, /* AVG CURR */ | |
234 | 0x0a, /* FLAGS */ | |
235 | 0x16, /* TTE */ | |
236 | INVALID_REG_ADDR, /* TTF - NA */ | |
237 | INVALID_REG_ADDR, /* TTES - NA */ | |
238 | INVALID_REG_ADDR, /* TTECP - NA */ | |
239 | 0x0c, /* NAC */ | |
240 | 0x12, /* LMD(FCC) */ | |
241 | 0x2a, /* CYCT */ | |
242 | INVALID_REG_ADDR, /* AE - NA */ | |
243 | 0x2c, /* SOC(RSOC) */ | |
244 | 0x3c, /* DCAP */ | |
245 | 0x76, /* AP */ | |
246 | }; | |
247 | ||
248 | static u8 bq27545_regs[] = { | |
249 | 0x00, /* CONTROL */ | |
250 | 0x06, /* TEMP */ | |
251 | 0x28, /* INT TEMP */ | |
252 | 0x08, /* VOLT */ | |
253 | 0x14, /* AVG CURR */ | |
254 | 0x0a, /* FLAGS */ | |
255 | 0x16, /* TTE */ | |
256 | INVALID_REG_ADDR, /* TTF - NA */ | |
257 | INVALID_REG_ADDR, /* TTES - NA */ | |
258 | INVALID_REG_ADDR, /* TTECP - NA */ | |
259 | 0x0c, /* NAC */ | |
260 | 0x12, /* LMD(FCC) */ | |
261 | 0x2a, /* CYCT */ | |
262 | INVALID_REG_ADDR, /* AE - NA */ | |
263 | 0x2c, /* SOC(RSOC) */ | |
264 | INVALID_REG_ADDR, /* DCAP - NA */ | |
265 | 0x24, /* AP */ | |
266 | }; | |
267 | ||
268 | static u8 bq27421_regs[] = { | |
269 | 0x00, /* CONTROL */ | |
270 | 0x02, /* TEMP */ | |
271 | 0x1e, /* INT TEMP */ | |
272 | 0x04, /* VOLT */ | |
273 | 0x10, /* AVG CURR */ | |
274 | 0x06, /* FLAGS */ | |
275 | INVALID_REG_ADDR, /* TTE - NA */ | |
276 | INVALID_REG_ADDR, /* TTF - NA */ | |
277 | INVALID_REG_ADDR, /* TTES - NA */ | |
278 | INVALID_REG_ADDR, /* TTECP - NA */ | |
279 | 0x08, /* NAC */ | |
280 | 0x0e, /* FCC */ | |
281 | INVALID_REG_ADDR, /* CYCT - NA */ | |
282 | INVALID_REG_ADDR, /* AE - NA */ | |
283 | 0x1c, /* SOC */ | |
284 | 0x3c, /* DCAP */ | |
285 | 0x18, /* AP */ | |
286 | }; | |
287 | ||
288 | static u8 *bq27xxx_regs[] = { | |
289 | [BQ27000] = bq27000_regs, | |
290 | [BQ27010] = bq27010_regs, | |
291 | [BQ27500] = bq27500_regs, | |
292 | [BQ27530] = bq27530_regs, | |
293 | [BQ27541] = bq27541_regs, | |
294 | [BQ27545] = bq27545_regs, | |
295 | [BQ27421] = bq27421_regs, | |
296 | }; | |
297 | ||
298 | static enum power_supply_property bq27000_battery_props[] = { | |
4e924a81 | 299 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
300 | POWER_SUPPLY_PROP_PRESENT, |
301 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
302 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
303 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 304 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 305 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
306 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
307 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
308 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 309 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
310 | POWER_SUPPLY_PROP_CHARGE_FULL, |
311 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
312 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 313 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 314 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
315 | POWER_SUPPLY_PROP_POWER_AVG, |
316 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 317 | POWER_SUPPLY_PROP_MANUFACTURER, |
b996ad0e RG |
318 | }; |
319 | ||
d74534c2 | 320 | static enum power_supply_property bq27010_battery_props[] = { |
a66f59ba SG |
321 | POWER_SUPPLY_PROP_STATUS, |
322 | POWER_SUPPLY_PROP_PRESENT, | |
323 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
324 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
325 | POWER_SUPPLY_PROP_CAPACITY, | |
326 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
327 | POWER_SUPPLY_PROP_TEMP, | |
d74534c2 AD |
328 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
329 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
330 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
a66f59ba SG |
331 | POWER_SUPPLY_PROP_TECHNOLOGY, |
332 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
333 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
334 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
d74534c2 AD |
335 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
336 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 337 | POWER_SUPPLY_PROP_MANUFACTURER, |
a66f59ba SG |
338 | }; |
339 | ||
d74534c2 | 340 | static enum power_supply_property bq27500_battery_props[] = { |
628ef02c PV |
341 | POWER_SUPPLY_PROP_STATUS, |
342 | POWER_SUPPLY_PROP_PRESENT, | |
343 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
344 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
345 | POWER_SUPPLY_PROP_CAPACITY, | |
346 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
347 | POWER_SUPPLY_PROP_TEMP, | |
348 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
349 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
350 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
351 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
352 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
353 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
d74534c2 AD |
354 | POWER_SUPPLY_PROP_HEALTH, |
355 | POWER_SUPPLY_PROP_MANUFACTURER, | |
356 | }; | |
357 | ||
358 | static enum power_supply_property bq27530_battery_props[] = { | |
359 | POWER_SUPPLY_PROP_STATUS, | |
360 | POWER_SUPPLY_PROP_PRESENT, | |
361 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
362 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
363 | POWER_SUPPLY_PROP_CAPACITY, | |
364 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
365 | POWER_SUPPLY_PROP_TEMP, | |
366 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
367 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
368 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
369 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
628ef02c PV |
370 | POWER_SUPPLY_PROP_POWER_AVG, |
371 | POWER_SUPPLY_PROP_HEALTH, | |
d74534c2 | 372 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
db04fc5c | 373 | POWER_SUPPLY_PROP_MANUFACTURER, |
628ef02c PV |
374 | }; |
375 | ||
d74534c2 | 376 | static enum power_supply_property bq27541_battery_props[] = { |
f46bf82e AB |
377 | POWER_SUPPLY_PROP_STATUS, |
378 | POWER_SUPPLY_PROP_PRESENT, | |
379 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
380 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
381 | POWER_SUPPLY_PROP_CAPACITY, | |
382 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
383 | POWER_SUPPLY_PROP_TEMP, | |
384 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
385 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
386 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
387 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
388 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
389 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
390 | POWER_SUPPLY_PROP_POWER_AVG, | |
391 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 392 | POWER_SUPPLY_PROP_MANUFACTURER, |
f46bf82e AB |
393 | }; |
394 | ||
d74534c2 AD |
395 | static enum power_supply_property bq27545_battery_props[] = { |
396 | POWER_SUPPLY_PROP_STATUS, | |
397 | POWER_SUPPLY_PROP_PRESENT, | |
398 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
399 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
400 | POWER_SUPPLY_PROP_CAPACITY, | |
401 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
402 | POWER_SUPPLY_PROP_TEMP, | |
403 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
404 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
405 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
406 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
407 | POWER_SUPPLY_PROP_HEALTH, | |
408 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
409 | POWER_SUPPLY_PROP_POWER_AVG, | |
410 | POWER_SUPPLY_PROP_MANUFACTURER, | |
411 | }; | |
412 | ||
413 | static enum power_supply_property bq27421_battery_props[] = { | |
414 | POWER_SUPPLY_PROP_STATUS, | |
415 | POWER_SUPPLY_PROP_PRESENT, | |
416 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
417 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
418 | POWER_SUPPLY_PROP_CAPACITY, | |
419 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
420 | POWER_SUPPLY_PROP_TEMP, | |
421 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
422 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
423 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
424 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
425 | POWER_SUPPLY_PROP_MANUFACTURER, | |
426 | }; | |
427 | ||
428 | #define BQ27XXX_PROP(_id, _prop) \ | |
429 | [_id] = { \ | |
430 | .props = _prop, \ | |
431 | .size = ARRAY_SIZE(_prop), \ | |
432 | } | |
433 | ||
434 | static struct { | |
435 | enum power_supply_property *props; | |
436 | size_t size; | |
437 | } bq27xxx_battery_props[] = { | |
438 | BQ27XXX_PROP(BQ27000, bq27000_battery_props), | |
439 | BQ27XXX_PROP(BQ27010, bq27010_battery_props), | |
440 | BQ27XXX_PROP(BQ27500, bq27500_battery_props), | |
441 | BQ27XXX_PROP(BQ27530, bq27530_battery_props), | |
442 | BQ27XXX_PROP(BQ27541, bq27541_battery_props), | |
443 | BQ27XXX_PROP(BQ27545, bq27545_battery_props), | |
444 | BQ27XXX_PROP(BQ27421, bq27421_battery_props), | |
445 | }; | |
446 | ||
740b755a LPC |
447 | static unsigned int poll_interval = 360; |
448 | module_param(poll_interval, uint, 0644); | |
6d0a1815 AD |
449 | MODULE_PARM_DESC(poll_interval, |
450 | "battery poll interval in seconds - 0 disables polling"); | |
740b755a | 451 | |
b996ad0e | 452 | /* |
081bab21 | 453 | * Common code for BQ27xxx devices |
b996ad0e RG |
454 | */ |
455 | ||
d74534c2 | 456 | static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, |
ce33edfa | 457 | bool single) |
b996ad0e | 458 | { |
d74534c2 AD |
459 | /* Reports EINVAL for invalid/missing registers */ |
460 | if (!di || di->regs[reg_index] == INVALID_REG_ADDR) | |
461 | return -EINVAL; | |
b996ad0e | 462 | |
d74534c2 | 463 | return di->bus.read(di, di->regs[reg_index], single); |
a66f59ba SG |
464 | } |
465 | ||
b996ad0e | 466 | /* |
c5709032 | 467 | * Return the battery State-of-Charge |
b996ad0e RG |
468 | * Or < 0 if something fails. |
469 | */ | |
c5709032 | 470 | static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) |
b996ad0e | 471 | { |
c5709032 | 472 | int soc; |
b996ad0e | 473 | |
d74534c2 | 474 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); |
297a533b | 475 | |
c5709032 AD |
476 | if (soc < 0) |
477 | dev_dbg(di->dev, "error reading State-of-Charge\n"); | |
297a533b | 478 | |
c5709032 | 479 | return soc; |
b996ad0e RG |
480 | } |
481 | ||
631c17ee PR |
482 | /* |
483 | * Return a battery charge value in µAh | |
484 | * Or < 0 if something fails. | |
485 | */ | |
081bab21 | 486 | static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) |
631c17ee PR |
487 | { |
488 | int charge; | |
489 | ||
081bab21 | 490 | charge = bq27xxx_read(di, reg, false); |
631c17ee | 491 | if (charge < 0) { |
c6cd4f26 PR |
492 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
493 | reg, charge); | |
631c17ee PR |
494 | return charge; |
495 | } | |
496 | ||
d74534c2 AD |
497 | if (di->chip == BQ27000 || di->chip == BQ27010) |
498 | charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 499 | else |
d74534c2 | 500 | charge *= 1000; |
631c17ee PR |
501 | |
502 | return charge; | |
503 | } | |
504 | ||
505 | /* | |
c5709032 | 506 | * Return the battery Nominal available capacity in µAh |
631c17ee PR |
507 | * Or < 0 if something fails. |
508 | */ | |
081bab21 | 509 | static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) |
631c17ee | 510 | { |
e59ec4a1 | 511 | int flags; |
e59ec4a1 | 512 | |
d74534c2 AD |
513 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
514 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); | |
515 | if (flags >= 0 && (flags & BQ27000_FLAG_CI)) | |
516 | return -ENODATA; | |
517 | } | |
e59ec4a1 | 518 | |
d74534c2 | 519 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); |
631c17ee PR |
520 | } |
521 | ||
522 | /* | |
d74534c2 | 523 | * Return the battery Full Charge Capacity in µAh |
631c17ee PR |
524 | * Or < 0 if something fails. |
525 | */ | |
d74534c2 | 526 | static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) |
631c17ee | 527 | { |
d74534c2 | 528 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); |
631c17ee PR |
529 | } |
530 | ||
531 | /* | |
d74534c2 | 532 | * Return the Design Capacity in µAh |
631c17ee PR |
533 | * Or < 0 if something fails. |
534 | */ | |
d74534c2 | 535 | static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) |
631c17ee | 536 | { |
d74534c2 | 537 | int dcap; |
631c17ee | 538 | |
d74534c2 | 539 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); |
631c17ee | 540 | |
d74534c2 | 541 | if (dcap < 0) { |
c6cd4f26 | 542 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
d74534c2 | 543 | return dcap; |
631c17ee PR |
544 | } |
545 | ||
d74534c2 AD |
546 | if (di->chip == BQ27000 || di->chip == BQ27010) |
547 | dcap *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 548 | else |
d74534c2 | 549 | dcap *= 1000; |
631c17ee | 550 | |
d74534c2 | 551 | return dcap; |
631c17ee PR |
552 | } |
553 | ||
a8f6bd23 PR |
554 | /* |
555 | * Return the battery Available energy in µWh | |
556 | * Or < 0 if something fails. | |
557 | */ | |
081bab21 | 558 | static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) |
a8f6bd23 PR |
559 | { |
560 | int ae; | |
561 | ||
d74534c2 | 562 | ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); |
a8f6bd23 | 563 | if (ae < 0) { |
c6cd4f26 | 564 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
565 | return ae; |
566 | } | |
567 | ||
d74534c2 AD |
568 | if (di->chip == BQ27000 || di->chip == BQ27010) |
569 | ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; | |
a8f6bd23 | 570 | else |
d74534c2 | 571 | ae *= 1000; |
a8f6bd23 PR |
572 | |
573 | return ae; | |
574 | } | |
575 | ||
d149e98e | 576 | /* |
5dc3443e | 577 | * Return the battery temperature in tenths of degree Kelvin |
d149e98e PR |
578 | * Or < 0 if something fails. |
579 | */ | |
081bab21 | 580 | static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) |
d149e98e PR |
581 | { |
582 | int temp; | |
583 | ||
d74534c2 | 584 | temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); |
d149e98e PR |
585 | if (temp < 0) { |
586 | dev_err(di->dev, "error reading temperature\n"); | |
587 | return temp; | |
588 | } | |
589 | ||
d74534c2 | 590 | if (di->chip == BQ27000 || di->chip == BQ27010) |
5dc3443e | 591 | temp = 5 * temp / 2; |
d149e98e PR |
592 | |
593 | return temp; | |
594 | } | |
595 | ||
631c17ee PR |
596 | /* |
597 | * Return the battery Cycle count total | |
598 | * Or < 0 if something fails. | |
599 | */ | |
081bab21 | 600 | static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) |
631c17ee PR |
601 | { |
602 | int cyct; | |
603 | ||
d74534c2 | 604 | cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); |
631c17ee PR |
605 | if (cyct < 0) |
606 | dev_err(di->dev, "error reading cycle count total\n"); | |
607 | ||
608 | return cyct; | |
609 | } | |
610 | ||
b996ad0e | 611 | /* |
297a533b LPC |
612 | * Read a time register. |
613 | * Return < 0 if something fails. | |
b996ad0e | 614 | */ |
081bab21 | 615 | static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) |
b996ad0e | 616 | { |
297a533b | 617 | int tval; |
b996ad0e | 618 | |
081bab21 | 619 | tval = bq27xxx_read(di, reg, false); |
297a533b | 620 | if (tval < 0) { |
c6cd4f26 PR |
621 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
622 | reg, tval); | |
297a533b | 623 | return tval; |
b996ad0e RG |
624 | } |
625 | ||
297a533b LPC |
626 | if (tval == 65535) |
627 | return -ENODATA; | |
628 | ||
629 | return tval * 60; | |
630 | } | |
631 | ||
9903e627 | 632 | /* |
c5709032 | 633 | * Read an average power register. |
9903e627 SR |
634 | * Return < 0 if something fails. |
635 | */ | |
d74534c2 | 636 | static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) |
9903e627 SR |
637 | { |
638 | int tval; | |
639 | ||
d74534c2 | 640 | tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
9903e627 | 641 | if (tval < 0) { |
d74534c2 AD |
642 | dev_err(di->dev, "error reading average power register %02x: %d\n", |
643 | BQ27XXX_REG_AP, tval); | |
9903e627 SR |
644 | return tval; |
645 | } | |
646 | ||
d74534c2 AD |
647 | if (di->chip == BQ27000 || di->chip == BQ27010) |
648 | return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; | |
649 | else | |
9903e627 | 650 | return tval; |
d74534c2 AD |
651 | } |
652 | ||
653 | /* | |
654 | * Returns true if a battery over temperature condition is detected | |
655 | */ | |
74aab849 | 656 | static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
d74534c2 | 657 | { |
74aab849 | 658 | if (di->chip == BQ27500 || di->chip == BQ27541 || di->chip == BQ27545) |
d74534c2 | 659 | return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
74aab849 AD |
660 | if (di->chip == BQ27530 || di->chip == BQ27421) |
661 | return flags & BQ27XXX_FLAG_OT; | |
662 | ||
663 | return false; | |
664 | } | |
665 | ||
666 | /* | |
667 | * Returns true if a battery under temperature condition is detected | |
668 | */ | |
669 | static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) | |
670 | { | |
671 | if (di->chip == BQ27530 || di->chip == BQ27421) | |
672 | return flags & BQ27XXX_FLAG_UT; | |
673 | ||
674 | return false; | |
675 | } | |
676 | ||
677 | /* | |
678 | * Returns true if a low state of charge condition is detected | |
679 | */ | |
680 | static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) | |
681 | { | |
682 | if (di->chip == BQ27000 || di->chip == BQ27010) | |
683 | return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); | |
9903e627 | 684 | else |
74aab849 | 685 | return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); |
9903e627 SR |
686 | } |
687 | ||
688 | /* | |
689 | * Read flag register. | |
690 | * Return < 0 if something fails. | |
691 | */ | |
081bab21 | 692 | static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) |
9903e627 | 693 | { |
2edd69a8 | 694 | int flags; |
9903e627 | 695 | |
74aab849 AD |
696 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); |
697 | if (flags < 0) { | |
698 | dev_err(di->dev, "error reading flag register:%d\n", flags); | |
699 | return flags; | |
9903e627 SR |
700 | } |
701 | ||
74aab849 AD |
702 | /* Unlikely but important to return first */ |
703 | if (unlikely(bq27xxx_battery_overtemp(di, flags))) | |
704 | return POWER_SUPPLY_HEALTH_OVERHEAT; | |
705 | if (unlikely(bq27xxx_battery_undertemp(di, flags))) | |
706 | return POWER_SUPPLY_HEALTH_COLD; | |
707 | if (unlikely(bq27xxx_battery_dead(di, flags))) | |
708 | return POWER_SUPPLY_HEALTH_DEAD; | |
9903e627 | 709 | |
74aab849 | 710 | return POWER_SUPPLY_HEALTH_GOOD; |
9903e627 SR |
711 | } |
712 | ||
081bab21 | 713 | static void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
297a533b | 714 | { |
081bab21 | 715 | struct bq27xxx_reg_cache cache = {0, }; |
d74534c2 AD |
716 | bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; |
717 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; | |
297a533b | 718 | |
d74534c2 | 719 | cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
3dd843e1 | 720 | if ((cache.flags & 0xff) == 0xff) |
d74534c2 | 721 | cache.flags = -1; /* read error */ |
297a533b | 722 | if (cache.flags >= 0) { |
d74534c2 AD |
723 | cache.temperature = bq27xxx_battery_read_temperature(di); |
724 | if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { | |
c6cd4f26 | 725 | dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 726 | cache.capacity = -ENODATA; |
a8f6bd23 | 727 | cache.energy = -ENODATA; |
4b226c2c PR |
728 | cache.time_to_empty = -ENODATA; |
729 | cache.time_to_empty_avg = -ENODATA; | |
730 | cache.time_to_full = -ENODATA; | |
731 | cache.charge_full = -ENODATA; | |
9903e627 | 732 | cache.health = -ENODATA; |
4b226c2c | 733 | } else { |
d74534c2 AD |
734 | if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) |
735 | cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); | |
736 | if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) | |
737 | cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); | |
738 | if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) | |
739 | cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); | |
740 | cache.charge_full = bq27xxx_battery_read_fcc(di); | |
c5709032 | 741 | cache.capacity = bq27xxx_battery_read_soc(di); |
d74534c2 | 742 | if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) |
081bab21 | 743 | cache.energy = bq27xxx_battery_read_energy(di); |
081bab21 | 744 | cache.health = bq27xxx_battery_read_health(di); |
4b226c2c | 745 | } |
d74534c2 | 746 | if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) |
081bab21 | 747 | cache.cycle_count = bq27xxx_battery_read_cyct(di); |
d74534c2 AD |
748 | if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) |
749 | cache.power_avg = bq27xxx_battery_read_pwr_avg(di); | |
297a533b | 750 | |
631c17ee PR |
751 | /* We only have to read charge design full once */ |
752 | if (di->charge_design_full <= 0) | |
d74534c2 | 753 | di->charge_design_full = bq27xxx_battery_read_dcap(di); |
297a533b LPC |
754 | } |
755 | ||
90f04a28 | 756 | if (di->cache.capacity != cache.capacity) |
297d716f | 757 | power_supply_changed(di->bat); |
90f04a28 PV |
758 | |
759 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) | |
760 | di->cache = cache; | |
297a533b LPC |
761 | |
762 | di->last_update = jiffies; | |
763 | } | |
764 | ||
081bab21 | 765 | static void bq27xxx_battery_poll(struct work_struct *work) |
740b755a | 766 | { |
081bab21 | 767 | struct bq27xxx_device_info *di = |
d74534c2 AD |
768 | container_of(work, struct bq27xxx_device_info, |
769 | work.work); | |
740b755a | 770 | |
081bab21 | 771 | bq27xxx_battery_update(di); |
740b755a LPC |
772 | |
773 | if (poll_interval > 0) { | |
774 | /* The timer does not have to be accurate. */ | |
775 | set_timer_slack(&di->work.timer, poll_interval * HZ / 4); | |
776 | schedule_delayed_work(&di->work, poll_interval * HZ); | |
777 | } | |
778 | } | |
779 | ||
b996ad0e | 780 | /* |
bf7d4140 | 781 | * Return the battery average current in µA |
b996ad0e RG |
782 | * Note that current can be negative signed as well |
783 | * Or 0 if something fails. | |
784 | */ | |
081bab21 | 785 | static int bq27xxx_battery_current(struct bq27xxx_device_info *di, |
ce33edfa | 786 | union power_supply_propval *val) |
b996ad0e | 787 | { |
297a533b | 788 | int curr; |
b68f6216 | 789 | int flags; |
b996ad0e | 790 | |
d74534c2 | 791 | curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); |
c6cd4f26 PR |
792 | if (curr < 0) { |
793 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 794 | return curr; |
c6cd4f26 | 795 | } |
e20908d9 | 796 | |
d74534c2 AD |
797 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
798 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); | |
b68f6216 | 799 | if (flags & BQ27000_FLAG_CHGS) { |
e20908d9 | 800 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 801 | curr = -curr; |
e20908d9 | 802 | } |
b996ad0e | 803 | |
d74534c2 AD |
804 | val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
805 | } else { | |
806 | /* Other gauges return signed value */ | |
807 | val->intval = (int)((s16)curr) * 1000; | |
b996ad0e RG |
808 | } |
809 | ||
297a533b | 810 | return 0; |
b996ad0e RG |
811 | } |
812 | ||
081bab21 | 813 | static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
ce33edfa | 814 | union power_supply_propval *val) |
4e924a81 | 815 | { |
4e924a81 | 816 | int status; |
4e924a81 | 817 | |
d74534c2 | 818 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
c1b9ab67 LPC |
819 | if (di->cache.flags & BQ27000_FLAG_FC) |
820 | status = POWER_SUPPLY_STATUS_FULL; | |
821 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 822 | status = POWER_SUPPLY_STATUS_CHARGING; |
297d716f | 823 | else if (power_supply_am_i_supplied(di->bat)) |
c1b9ab67 | 824 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
4e924a81 GI |
825 | else |
826 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
d74534c2 AD |
827 | } else { |
828 | if (di->cache.flags & BQ27XXX_FLAG_FC) | |
829 | status = POWER_SUPPLY_STATUS_FULL; | |
830 | else if (di->cache.flags & BQ27XXX_FLAG_DSC) | |
831 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
832 | else | |
833 | status = POWER_SUPPLY_STATUS_CHARGING; | |
4e924a81 GI |
834 | } |
835 | ||
836 | val->intval = status; | |
297a533b | 837 | |
4e924a81 GI |
838 | return 0; |
839 | } | |
840 | ||
081bab21 | 841 | static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, |
ce33edfa | 842 | union power_supply_propval *val) |
d66bab3f PR |
843 | { |
844 | int level; | |
845 | ||
d74534c2 AD |
846 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
847 | if (di->cache.flags & BQ27000_FLAG_FC) | |
d66bab3f | 848 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 849 | else if (di->cache.flags & BQ27000_FLAG_EDV1) |
d66bab3f | 850 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 851 | else if (di->cache.flags & BQ27000_FLAG_EDVF) |
d66bab3f PR |
852 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
853 | else | |
854 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
855 | } else { | |
d74534c2 | 856 | if (di->cache.flags & BQ27XXX_FLAG_FC) |
d66bab3f | 857 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 858 | else if (di->cache.flags & BQ27XXX_FLAG_SOC1) |
d66bab3f | 859 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 860 | else if (di->cache.flags & BQ27XXX_FLAG_SOCF) |
d66bab3f PR |
861 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
862 | else | |
863 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
864 | } | |
865 | ||
866 | val->intval = level; | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
4e924a81 | 871 | /* |
91fe4d50 | 872 | * Return the battery Voltage in millivolts |
297a533b | 873 | * Or < 0 if something fails. |
4e924a81 | 874 | */ |
081bab21 | 875 | static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, |
ce33edfa | 876 | union power_supply_propval *val) |
4e924a81 | 877 | { |
297a533b | 878 | int volt; |
4e924a81 | 879 | |
d74534c2 | 880 | volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); |
c6cd4f26 PR |
881 | if (volt < 0) { |
882 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 883 | return volt; |
c6cd4f26 | 884 | } |
4e924a81 | 885 | |
297a533b LPC |
886 | val->intval = volt * 1000; |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
081bab21 | 891 | static int bq27xxx_simple_value(int value, |
ce33edfa | 892 | union power_supply_propval *val) |
297a533b LPC |
893 | { |
894 | if (value < 0) | |
895 | return value; | |
896 | ||
897 | val->intval = value; | |
4e924a81 | 898 | |
4e924a81 GI |
899 | return 0; |
900 | } | |
901 | ||
081bab21 | 902 | static int bq27xxx_battery_get_property(struct power_supply *psy, |
b996ad0e RG |
903 | enum power_supply_property psp, |
904 | union power_supply_propval *val) | |
905 | { | |
4e924a81 | 906 | int ret = 0; |
081bab21 | 907 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
3413b4ea | 908 | |
740b755a LPC |
909 | mutex_lock(&di->lock); |
910 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
911 | cancel_delayed_work_sync(&di->work); | |
081bab21 | 912 | bq27xxx_battery_poll(&di->work.work); |
740b755a LPC |
913 | } |
914 | mutex_unlock(&di->lock); | |
297a533b LPC |
915 | |
916 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 917 | return -ENODEV; |
b996ad0e RG |
918 | |
919 | switch (psp) { | |
4e924a81 | 920 | case POWER_SUPPLY_PROP_STATUS: |
081bab21 | 921 | ret = bq27xxx_battery_status(di, val); |
4e924a81 | 922 | break; |
b996ad0e | 923 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
081bab21 | 924 | ret = bq27xxx_battery_voltage(di, val); |
3413b4ea | 925 | break; |
b996ad0e | 926 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 927 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
928 | break; |
929 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
081bab21 | 930 | ret = bq27xxx_battery_current(di, val); |
b996ad0e RG |
931 | break; |
932 | case POWER_SUPPLY_PROP_CAPACITY: | |
081bab21 | 933 | ret = bq27xxx_simple_value(di->cache.capacity, val); |
b996ad0e | 934 | break; |
d66bab3f | 935 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
081bab21 | 936 | ret = bq27xxx_battery_capacity_level(di, val); |
d66bab3f | 937 | break; |
b996ad0e | 938 | case POWER_SUPPLY_PROP_TEMP: |
081bab21 | 939 | ret = bq27xxx_simple_value(di->cache.temperature, val); |
5dc3443e | 940 | if (ret == 0) |
d74534c2 | 941 | val->intval -= 2731; /* convert decidegree k to c */ |
b996ad0e | 942 | break; |
4e924a81 | 943 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
081bab21 | 944 | ret = bq27xxx_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
945 | break; |
946 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
081bab21 | 947 | ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
948 | break; |
949 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
081bab21 | 950 | ret = bq27xxx_simple_value(di->cache.time_to_full, val); |
4e924a81 | 951 | break; |
5661f334 LPC |
952 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
953 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
954 | break; | |
631c17ee | 955 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
081bab21 | 956 | ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val); |
631c17ee PR |
957 | break; |
958 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
081bab21 | 959 | ret = bq27xxx_simple_value(di->cache.charge_full, val); |
631c17ee PR |
960 | break; |
961 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
081bab21 | 962 | ret = bq27xxx_simple_value(di->charge_design_full, val); |
631c17ee | 963 | break; |
73c244a8 | 964 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
081bab21 | 965 | ret = bq27xxx_simple_value(di->cache.cycle_count, val); |
631c17ee PR |
966 | break; |
967 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
081bab21 | 968 | ret = bq27xxx_simple_value(di->cache.energy, val); |
631c17ee | 969 | break; |
9903e627 | 970 | case POWER_SUPPLY_PROP_POWER_AVG: |
081bab21 | 971 | ret = bq27xxx_simple_value(di->cache.power_avg, val); |
9903e627 SR |
972 | break; |
973 | case POWER_SUPPLY_PROP_HEALTH: | |
081bab21 | 974 | ret = bq27xxx_simple_value(di->cache.health, val); |
9903e627 | 975 | break; |
db04fc5c AD |
976 | case POWER_SUPPLY_PROP_MANUFACTURER: |
977 | val->strval = BQ27XXX_MANUFACTURER; | |
978 | break; | |
b996ad0e RG |
979 | default: |
980 | return -EINVAL; | |
981 | } | |
982 | ||
4e924a81 | 983 | return ret; |
b996ad0e RG |
984 | } |
985 | ||
081bab21 | 986 | static void bq27xxx_external_power_changed(struct power_supply *psy) |
740b755a | 987 | { |
081bab21 | 988 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
740b755a LPC |
989 | |
990 | cancel_delayed_work_sync(&di->work); | |
991 | schedule_delayed_work(&di->work, 0); | |
992 | } | |
993 | ||
081bab21 | 994 | static int bq27xxx_powersupply_init(struct bq27xxx_device_info *di, |
297d716f | 995 | const char *name) |
b996ad0e | 996 | { |
a40402ef | 997 | int ret; |
297d716f KK |
998 | struct power_supply_desc *psy_desc; |
999 | struct power_supply_config psy_cfg = { .drv_data = di, }; | |
1000 | ||
1001 | psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL); | |
1002 | if (!psy_desc) | |
1003 | return -ENOMEM; | |
a40402ef | 1004 | |
297d716f KK |
1005 | psy_desc->name = name; |
1006 | psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; | |
d74534c2 AD |
1007 | psy_desc->properties = bq27xxx_battery_props[di->chip].props; |
1008 | psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; | |
081bab21 AD |
1009 | psy_desc->get_property = bq27xxx_battery_get_property; |
1010 | psy_desc->external_power_changed = bq27xxx_external_power_changed; | |
740b755a | 1011 | |
081bab21 | 1012 | INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll); |
740b755a | 1013 | mutex_init(&di->lock); |
a40402ef | 1014 | |
297d716f KK |
1015 | di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg); |
1016 | if (IS_ERR(di->bat)) { | |
1017 | ret = PTR_ERR(di->bat); | |
a40402ef LPC |
1018 | dev_err(di->dev, "failed to register battery: %d\n", ret); |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
1023 | ||
081bab21 | 1024 | bq27xxx_battery_update(di); |
297a533b | 1025 | |
a40402ef | 1026 | return 0; |
b996ad0e RG |
1027 | } |
1028 | ||
081bab21 | 1029 | static void bq27xxx_powersupply_unregister(struct bq27xxx_device_info *di) |
740b755a | 1030 | { |
8cfaaa81 | 1031 | /* |
081bab21 AD |
1032 | * power_supply_unregister call bq27xxx_battery_get_property which |
1033 | * call bq27xxx_battery_poll. | |
1034 | * Make sure that bq27xxx_battery_poll will not call | |
8cfaaa81 PR |
1035 | * schedule_delayed_work again after unregister (which cause OOPS). |
1036 | */ | |
1037 | poll_interval = 0; | |
1038 | ||
740b755a LPC |
1039 | cancel_delayed_work_sync(&di->work); |
1040 | ||
297d716f | 1041 | power_supply_unregister(di->bat); |
740b755a LPC |
1042 | |
1043 | mutex_destroy(&di->lock); | |
1044 | } | |
1045 | ||
7fb7ba58 | 1046 | /* i2c specific code */ |
081bab21 | 1047 | #ifdef CONFIG_BATTERY_BQ27XXX_I2C |
7fb7ba58 LPC |
1048 | |
1049 | /* If the system has several batteries we need a different name for each | |
1050 | * of them... | |
b996ad0e | 1051 | */ |
7fb7ba58 LPC |
1052 | static DEFINE_IDR(battery_id); |
1053 | static DEFINE_MUTEX(battery_mutex); | |
b996ad0e | 1054 | |
41a90db8 SR |
1055 | static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data) |
1056 | { | |
1057 | struct bq27xxx_device_info *di = data; | |
1058 | ||
1059 | bq27xxx_battery_update(di); | |
1060 | ||
1061 | return IRQ_HANDLED; | |
1062 | } | |
1063 | ||
081bab21 AD |
1064 | static int bq27xxx_battery_i2c_read(struct bq27xxx_device_info *di, u8 reg, |
1065 | bool single) | |
b996ad0e | 1066 | { |
a40402ef | 1067 | struct i2c_client *client = to_i2c_client(di->dev); |
9e912f45 | 1068 | struct i2c_msg msg[2]; |
b996ad0e | 1069 | unsigned char data[2]; |
297a533b | 1070 | int ret; |
b996ad0e RG |
1071 | |
1072 | if (!client->adapter) | |
1073 | return -ENODEV; | |
1074 | ||
9e912f45 GI |
1075 | msg[0].addr = client->addr; |
1076 | msg[0].flags = 0; | |
1077 | msg[0].buf = ® | |
1078 | msg[0].len = sizeof(reg); | |
1079 | msg[1].addr = client->addr; | |
1080 | msg[1].flags = I2C_M_RD; | |
1081 | msg[1].buf = data; | |
2ec523a8 | 1082 | if (single) |
9e912f45 | 1083 | msg[1].len = 1; |
2ec523a8 | 1084 | else |
9e912f45 | 1085 | msg[1].len = 2; |
2ec523a8 | 1086 | |
9e912f45 | 1087 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
2ec523a8 LPC |
1088 | if (ret < 0) |
1089 | return ret; | |
1090 | ||
1091 | if (!single) | |
1092 | ret = get_unaligned_le16(data); | |
1093 | else | |
1094 | ret = data[0]; | |
b996ad0e | 1095 | |
297a533b | 1096 | return ret; |
b996ad0e RG |
1097 | } |
1098 | ||
081bab21 AD |
1099 | static int bq27xxx_battery_i2c_probe(struct i2c_client *client, |
1100 | const struct i2c_device_id *id) | |
b996ad0e RG |
1101 | { |
1102 | char *name; | |
081bab21 | 1103 | struct bq27xxx_device_info *di; |
b996ad0e RG |
1104 | int num; |
1105 | int retval = 0; | |
1106 | ||
1107 | /* Get new ID for the new battery device */ | |
b996ad0e | 1108 | mutex_lock(&battery_mutex); |
05e2cefa | 1109 | num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL); |
b996ad0e | 1110 | mutex_unlock(&battery_mutex); |
05e2cefa TH |
1111 | if (num < 0) |
1112 | return num; | |
b996ad0e | 1113 | |
297d716f | 1114 | name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num); |
b996ad0e | 1115 | if (!name) { |
b996ad0e | 1116 | retval = -ENOMEM; |
297d716f | 1117 | goto batt_failed; |
b996ad0e RG |
1118 | } |
1119 | ||
1cb82fdb | 1120 | di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL); |
b996ad0e | 1121 | if (!di) { |
b996ad0e | 1122 | retval = -ENOMEM; |
297d716f | 1123 | goto batt_failed; |
b996ad0e | 1124 | } |
a40402ef | 1125 | |
b996ad0e | 1126 | di->id = num; |
a40402ef | 1127 | di->dev = &client->dev; |
e20908d9 | 1128 | di->chip = id->driver_data; |
081bab21 | 1129 | di->bus.read = &bq27xxx_battery_i2c_read; |
d74534c2 | 1130 | di->regs = bq27xxx_regs[di->chip]; |
b996ad0e | 1131 | |
081bab21 | 1132 | retval = bq27xxx_powersupply_init(di, name); |
f7760995 | 1133 | if (retval) |
297d716f | 1134 | goto batt_failed; |
b996ad0e | 1135 | |
d74534c2 AD |
1136 | /* Schedule a polling after about 1 min */ |
1137 | schedule_delayed_work(&di->work, 60 * HZ); | |
1138 | ||
b996ad0e | 1139 | i2c_set_clientdata(client, di); |
b996ad0e | 1140 | |
8807feb9 AD |
1141 | if (client->irq) { |
1142 | retval = devm_request_threaded_irq(&client->dev, client->irq, | |
1143 | NULL, bq27xxx_battery_irq_handler_thread, | |
1144 | IRQF_ONESHOT, | |
1145 | name, di); | |
1146 | if (retval) { | |
1147 | dev_err(&client->dev, | |
1148 | "Unable to register IRQ %d error %d\n", | |
1149 | client->irq, retval); | |
1150 | return retval; | |
1151 | } | |
1152 | } | |
1153 | ||
b996ad0e RG |
1154 | return 0; |
1155 | ||
297d716f | 1156 | batt_failed: |
b996ad0e RG |
1157 | mutex_lock(&battery_mutex); |
1158 | idr_remove(&battery_id, num); | |
1159 | mutex_unlock(&battery_mutex); | |
1160 | ||
1161 | return retval; | |
1162 | } | |
1163 | ||
081bab21 | 1164 | static int bq27xxx_battery_i2c_remove(struct i2c_client *client) |
b996ad0e | 1165 | { |
081bab21 | 1166 | struct bq27xxx_device_info *di = i2c_get_clientdata(client); |
b996ad0e | 1167 | |
081bab21 | 1168 | bq27xxx_powersupply_unregister(di); |
b996ad0e | 1169 | |
b996ad0e RG |
1170 | mutex_lock(&battery_mutex); |
1171 | idr_remove(&battery_id, di->id); | |
1172 | mutex_unlock(&battery_mutex); | |
1173 | ||
b996ad0e RG |
1174 | return 0; |
1175 | } | |
1176 | ||
081bab21 | 1177 | static const struct i2c_device_id bq27xxx_id[] = { |
d74534c2 AD |
1178 | { "bq27200", BQ27000 }, |
1179 | { "bq27210", BQ27010 }, | |
e20908d9 | 1180 | { "bq27500", BQ27500 }, |
d74534c2 AD |
1181 | { "bq27510", BQ27500 }, |
1182 | { "bq27520", BQ27500 }, | |
1183 | { "bq27530", BQ27530 }, | |
1184 | { "bq27531", BQ27530 }, | |
1185 | { "bq27541", BQ27541 }, | |
1186 | { "bq27542", BQ27541 }, | |
1187 | { "bq27546", BQ27541 }, | |
1188 | { "bq27742", BQ27541 }, | |
1189 | { "bq27545", BQ27545 }, | |
1190 | { "bq27421", BQ27421 }, | |
1191 | { "bq27425", BQ27421 }, | |
1192 | { "bq27441", BQ27421 }, | |
1193 | { "bq27621", BQ27421 }, | |
b996ad0e RG |
1194 | {}, |
1195 | }; | |
081bab21 | 1196 | MODULE_DEVICE_TABLE(i2c, bq27xxx_id); |
b996ad0e | 1197 | |
081bab21 | 1198 | static struct i2c_driver bq27xxx_battery_i2c_driver = { |
b996ad0e | 1199 | .driver = { |
081bab21 | 1200 | .name = "bq27xxx-battery", |
b996ad0e | 1201 | }, |
081bab21 AD |
1202 | .probe = bq27xxx_battery_i2c_probe, |
1203 | .remove = bq27xxx_battery_i2c_remove, | |
1204 | .id_table = bq27xxx_id, | |
b996ad0e RG |
1205 | }; |
1206 | ||
081bab21 | 1207 | static inline int bq27xxx_battery_i2c_init(void) |
7fb7ba58 | 1208 | { |
081bab21 | 1209 | int ret = i2c_add_driver(&bq27xxx_battery_i2c_driver); |
6d0a1815 | 1210 | |
7fb7ba58 | 1211 | if (ret) |
081bab21 | 1212 | pr_err("Unable to register BQ27xxx i2c driver\n"); |
7fb7ba58 LPC |
1213 | |
1214 | return ret; | |
1215 | } | |
1216 | ||
081bab21 | 1217 | static inline void bq27xxx_battery_i2c_exit(void) |
7fb7ba58 | 1218 | { |
081bab21 | 1219 | i2c_del_driver(&bq27xxx_battery_i2c_driver); |
7fb7ba58 LPC |
1220 | } |
1221 | ||
1222 | #else | |
1223 | ||
081bab21 AD |
1224 | static inline int bq27xxx_battery_i2c_init(void) { return 0; } |
1225 | static inline void bq27xxx_battery_i2c_exit(void) {}; | |
7fb7ba58 LPC |
1226 | |
1227 | #endif | |
1228 | ||
1229 | /* platform specific code */ | |
081bab21 | 1230 | #ifdef CONFIG_BATTERY_BQ27XXX_PLATFORM |
7fb7ba58 | 1231 | |
081bab21 AD |
1232 | static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg, |
1233 | bool single) | |
7fb7ba58 LPC |
1234 | { |
1235 | struct device *dev = di->dev; | |
081bab21 | 1236 | struct bq27xxx_platform_data *pdata = dev->platform_data; |
7fb7ba58 LPC |
1237 | unsigned int timeout = 3; |
1238 | int upper, lower; | |
1239 | int temp; | |
1240 | ||
1241 | if (!single) { | |
1242 | /* Make sure the value has not changed in between reading the | |
1243 | * lower and the upper part */ | |
1244 | upper = pdata->read(dev, reg + 1); | |
1245 | do { | |
1246 | temp = upper; | |
1247 | if (upper < 0) | |
1248 | return upper; | |
1249 | ||
1250 | lower = pdata->read(dev, reg); | |
1251 | if (lower < 0) | |
1252 | return lower; | |
1253 | ||
1254 | upper = pdata->read(dev, reg + 1); | |
1255 | } while (temp != upper && --timeout); | |
1256 | ||
1257 | if (timeout == 0) | |
1258 | return -EIO; | |
1259 | ||
297a533b | 1260 | return (upper << 8) | lower; |
7fb7ba58 | 1261 | } |
297a533b LPC |
1262 | |
1263 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
1264 | } |
1265 | ||
081bab21 | 1266 | static int bq27xxx_battery_platform_probe(struct platform_device *pdev) |
7fb7ba58 | 1267 | { |
081bab21 AD |
1268 | struct bq27xxx_device_info *di; |
1269 | struct bq27xxx_platform_data *pdata = pdev->dev.platform_data; | |
297d716f | 1270 | const char *name; |
7fb7ba58 LPC |
1271 | |
1272 | if (!pdata) { | |
1273 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
1274 | return -EINVAL; | |
1275 | } | |
1276 | ||
1277 | if (!pdata->read) { | |
1278 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
1279 | return -EINVAL; | |
1280 | } | |
1281 | ||
424cfde4 AD |
1282 | if (!pdata->chip) { |
1283 | dev_err(&pdev->dev, "no device supplied\n"); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
1cb82fdb | 1287 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
6d0a1815 | 1288 | if (!di) |
7fb7ba58 | 1289 | return -ENOMEM; |
7fb7ba58 LPC |
1290 | |
1291 | platform_set_drvdata(pdev, di); | |
1292 | ||
1293 | di->dev = &pdev->dev; | |
424cfde4 | 1294 | di->chip = pdata->chip; |
0077ae7e | 1295 | di->regs = bq27xxx_regs[di->chip]; |
7fb7ba58 | 1296 | |
297d716f | 1297 | name = pdata->name ?: dev_name(&pdev->dev); |
081bab21 | 1298 | di->bus.read = &bq27xxx_battery_platform_read; |
7fb7ba58 | 1299 | |
081bab21 | 1300 | return bq27xxx_powersupply_init(di, name); |
7fb7ba58 LPC |
1301 | } |
1302 | ||
081bab21 | 1303 | static int bq27xxx_battery_platform_remove(struct platform_device *pdev) |
7fb7ba58 | 1304 | { |
081bab21 | 1305 | struct bq27xxx_device_info *di = platform_get_drvdata(pdev); |
7fb7ba58 | 1306 | |
081bab21 | 1307 | bq27xxx_powersupply_unregister(di); |
740b755a | 1308 | |
7fb7ba58 LPC |
1309 | return 0; |
1310 | } | |
1311 | ||
081bab21 AD |
1312 | static struct platform_driver bq27xxx_battery_platform_driver = { |
1313 | .probe = bq27xxx_battery_platform_probe, | |
1314 | .remove = bq27xxx_battery_platform_remove, | |
7fb7ba58 LPC |
1315 | .driver = { |
1316 | .name = "bq27000-battery", | |
7fb7ba58 LPC |
1317 | }, |
1318 | }; | |
1319 | ||
081bab21 | 1320 | static inline int bq27xxx_battery_platform_init(void) |
7fb7ba58 | 1321 | { |
081bab21 | 1322 | int ret = platform_driver_register(&bq27xxx_battery_platform_driver); |
6d0a1815 | 1323 | |
7fb7ba58 | 1324 | if (ret) |
081bab21 | 1325 | pr_err("Unable to register BQ27xxx platform driver\n"); |
7fb7ba58 LPC |
1326 | |
1327 | return ret; | |
1328 | } | |
1329 | ||
081bab21 | 1330 | static inline void bq27xxx_battery_platform_exit(void) |
7fb7ba58 | 1331 | { |
081bab21 | 1332 | platform_driver_unregister(&bq27xxx_battery_platform_driver); |
7fb7ba58 LPC |
1333 | } |
1334 | ||
1335 | #else | |
1336 | ||
081bab21 AD |
1337 | static inline int bq27xxx_battery_platform_init(void) { return 0; } |
1338 | static inline void bq27xxx_battery_platform_exit(void) {}; | |
7fb7ba58 LPC |
1339 | |
1340 | #endif | |
1341 | ||
1342 | /* | |
1343 | * Module stuff | |
1344 | */ | |
1345 | ||
081bab21 | 1346 | static int __init bq27xxx_battery_init(void) |
b996ad0e RG |
1347 | { |
1348 | int ret; | |
1349 | ||
081bab21 | 1350 | ret = bq27xxx_battery_i2c_init(); |
7fb7ba58 LPC |
1351 | if (ret) |
1352 | return ret; | |
1353 | ||
081bab21 | 1354 | ret = bq27xxx_battery_platform_init(); |
b996ad0e | 1355 | if (ret) |
081bab21 | 1356 | bq27xxx_battery_i2c_exit(); |
b996ad0e RG |
1357 | |
1358 | return ret; | |
1359 | } | |
081bab21 | 1360 | module_init(bq27xxx_battery_init); |
b996ad0e | 1361 | |
081bab21 | 1362 | static void __exit bq27xxx_battery_exit(void) |
b996ad0e | 1363 | { |
081bab21 AD |
1364 | bq27xxx_battery_platform_exit(); |
1365 | bq27xxx_battery_i2c_exit(); | |
b996ad0e | 1366 | } |
081bab21 | 1367 | module_exit(bq27xxx_battery_exit); |
b996ad0e | 1368 | |
081bab21 | 1369 | #ifdef CONFIG_BATTERY_BQ27XXX_PLATFORM |
8ebb7e9c MB |
1370 | MODULE_ALIAS("platform:bq27000-battery"); |
1371 | #endif | |
1372 | ||
b996ad0e | 1373 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
081bab21 | 1374 | MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
b996ad0e | 1375 | MODULE_LICENSE("GPL"); |