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Merge branch 'pm-cpufreq'
[linux-2.6-block.git] / drivers / power / bq27x00_battery.c
CommitLineData
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 *
631c17ee
PR		 19 * Datasheets:
20 * http://focus.ti.com/docs/prod/folders/print/bq27000.html
21 * http://focus.ti.com/docs/prod/folders/print/bq27500.html
a66f59ba 22 * http://www.ti.com/product/bq27425-g1
628ef02c 23 * http://www.ti.com/product/BQ27742-G1
f46bf82e 24 * http://www.ti.com/product/BQ27510-G3
631c17ee
PR		 25 */
26
1cb82fdb 27#include <linux/device.h>
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
6eb207f2 42#define DRIVER_VERSION "1.2.0"
b996ad0e 43
db04fc5c
AD		 44#define BQ27XXX_MANUFACTURER "Texas Instruments"
45
6eb207f2
AD		 46#define BQ27x00_REG_TEMP 0x06
47#define BQ27x00_REG_VOLT 0x08
48#define BQ27x00_REG_AI 0x14
49#define BQ27x00_REG_FLAGS 0x0A
50#define BQ27x00_REG_TTE 0x16
51#define BQ27x00_REG_TTF 0x18
52#define BQ27x00_REG_TTECP 0x26
53#define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */
54#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
55#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
56#define BQ27x00_REG_AE 0x22 /* Available energy */
57#define BQ27x00_POWER_AVG 0x24
58
59#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
60#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
61#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
62#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
63#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
64#define BQ27000_FLAG_FC BIT(5)
65#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
66
67#define BQ27500_REG_SOC 0x2C
68#define BQ27500_REG_DCAP 0x3C /* Design capacity */
69#define BQ27500_FLAG_DSC BIT(0)
70#define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
71#define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
72#define BQ27500_FLAG_FC BIT(9)
73#define BQ27500_FLAG_OTC BIT(15)
74
75#define BQ27742_POWER_AVG 0x76
76
77#define BQ27510_REG_SOC 0x20
78#define BQ27510_REG_DCAP 0x2E /* Design capacity */
79#define BQ27510_REG_CYCT 0x1E /* Cycle count total */
f46bf82e 80
a66f59ba 81/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
6eb207f2 82#define BQ27425_REG_OFFSET 0x04
9dbf5a28 83#define BQ27425_REG_SOC (0x1C + BQ27425_REG_OFFSET)
6eb207f2 84#define BQ27425_REG_DCAP (0x3C + BQ27425_REG_OFFSET)
a66f59ba 85
a2e5118c 86#define BQ27000_RS 20 /* Resistor sense */
9903e627 87#define BQ27x00_POWER_CONSTANT (256 * 29200 / 1000)
a2e5118c 88
b996ad0e
RG		 89struct bq27x00_device_info;
90struct bq27x00_access_methods {
297a533b 91 int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
b996ad0e
RG		 92};
93
f46bf82e 94enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742, BQ27510};
e20908d9 95
297a533b
LPC		 96struct bq27x00_reg_cache {
97 int temperature;
98 int time_to_empty;
99 int time_to_empty_avg;
100 int time_to_full;
631c17ee 101 int charge_full;
73c244a8 102 int cycle_count;
297a533b 103 int capacity;
a8f6bd23 104 int energy;
297a533b 105 int flags;
9903e627
SR		 106 int power_avg;
107 int health;
297a533b
LPC		 108};
109
b996ad0e 110struct bq27x00_device_info {
6d0a1815 111 struct device *dev;
b996ad0e 112 int id;
e20908d9 113 enum bq27x00_chip chip;
b996ad0e 114
297a533b 115 struct bq27x00_reg_cache cache;
631c17ee
PR		 116 int charge_design_full;
117
297a533b 118 unsigned long last_update;
740b755a 119 struct delayed_work work;
297a533b 120
297d716f 121 struct power_supply *bat;
a40402ef
LPC		 122
123 struct bq27x00_access_methods bus;
740b755a
LPC		 124
125 struct mutex lock;
b996ad0e
RG		 126};
127
128static enum power_supply_property bq27x00_battery_props[] = {
4e924a81 129 POWER_SUPPLY_PROP_STATUS,
b996ad0e
RG		 130 POWER_SUPPLY_PROP_PRESENT,
131 POWER_SUPPLY_PROP_VOLTAGE_NOW,
132 POWER_SUPPLY_PROP_CURRENT_NOW,
133 POWER_SUPPLY_PROP_CAPACITY,
d66bab3f 134 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
b996ad0e 135 POWER_SUPPLY_PROP_TEMP,
4e924a81
GI		 136 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
137 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
138 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
5661f334 139 POWER_SUPPLY_PROP_TECHNOLOGY,
631c17ee
PR		 140 POWER_SUPPLY_PROP_CHARGE_FULL,
141 POWER_SUPPLY_PROP_CHARGE_NOW,
142 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
73c244a8 143 POWER_SUPPLY_PROP_CYCLE_COUNT,
631c17ee 144 POWER_SUPPLY_PROP_ENERGY_NOW,
9903e627
SR		 145 POWER_SUPPLY_PROP_POWER_AVG,
146 POWER_SUPPLY_PROP_HEALTH,
db04fc5c 147 POWER_SUPPLY_PROP_MANUFACTURER,
b996ad0e
RG		 148};
149
a66f59ba
SG		 150static enum power_supply_property bq27425_battery_props[] = {
151 POWER_SUPPLY_PROP_STATUS,
152 POWER_SUPPLY_PROP_PRESENT,
153 POWER_SUPPLY_PROP_VOLTAGE_NOW,
154 POWER_SUPPLY_PROP_CURRENT_NOW,
155 POWER_SUPPLY_PROP_CAPACITY,
156 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
157 POWER_SUPPLY_PROP_TEMP,
158 POWER_SUPPLY_PROP_TECHNOLOGY,
159 POWER_SUPPLY_PROP_CHARGE_FULL,
160 POWER_SUPPLY_PROP_CHARGE_NOW,
161 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
db04fc5c 162 POWER_SUPPLY_PROP_MANUFACTURER,
a66f59ba
SG		 163};
164
628ef02c
PV		 165static enum power_supply_property bq27742_battery_props[] = {
166 POWER_SUPPLY_PROP_STATUS,
167 POWER_SUPPLY_PROP_PRESENT,
168 POWER_SUPPLY_PROP_VOLTAGE_NOW,
169 POWER_SUPPLY_PROP_CURRENT_NOW,
170 POWER_SUPPLY_PROP_CAPACITY,
171 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
172 POWER_SUPPLY_PROP_TEMP,
173 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
174 POWER_SUPPLY_PROP_TECHNOLOGY,
175 POWER_SUPPLY_PROP_CHARGE_FULL,
176 POWER_SUPPLY_PROP_CHARGE_NOW,
177 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
178 POWER_SUPPLY_PROP_CYCLE_COUNT,
179 POWER_SUPPLY_PROP_POWER_AVG,
180 POWER_SUPPLY_PROP_HEALTH,
db04fc5c 181 POWER_SUPPLY_PROP_MANUFACTURER,
628ef02c
PV		 182};
183
f46bf82e
AB		 184static enum power_supply_property bq27510_battery_props[] = {
185 POWER_SUPPLY_PROP_STATUS,
186 POWER_SUPPLY_PROP_PRESENT,
187 POWER_SUPPLY_PROP_VOLTAGE_NOW,
188 POWER_SUPPLY_PROP_CURRENT_NOW,
189 POWER_SUPPLY_PROP_CAPACITY,
190 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
191 POWER_SUPPLY_PROP_TEMP,
192 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
193 POWER_SUPPLY_PROP_TECHNOLOGY,
194 POWER_SUPPLY_PROP_CHARGE_FULL,
195 POWER_SUPPLY_PROP_CHARGE_NOW,
196 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
197 POWER_SUPPLY_PROP_CYCLE_COUNT,
198 POWER_SUPPLY_PROP_POWER_AVG,
199 POWER_SUPPLY_PROP_HEALTH,
db04fc5c 200 POWER_SUPPLY_PROP_MANUFACTURER,
f46bf82e
AB		 201};
202
740b755a
LPC		 203static unsigned int poll_interval = 360;
204module_param(poll_interval, uint, 0644);
6d0a1815
AD		 205MODULE_PARM_DESC(poll_interval,
206 "battery poll interval in seconds - 0 disables polling");
740b755a 207
b996ad0e
RG		 208/*
209 * Common code for BQ27x00 devices
210 */
211
a40402ef 212static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
ce33edfa 213 bool single)
b996ad0e 214{
a66f59ba
SG		 215 if (di->chip == BQ27425)
216 return di->bus.read(di, reg - BQ27425_REG_OFFSET, single);
297a533b 217 return di->bus.read(di, reg, single);
b996ad0e
RG		 218}
219
a66f59ba
SG		 220/*
221 * Higher versions of the chip like BQ27425 and BQ27500
222 * differ from BQ27000 and BQ27200 in calculation of certain
223 * parameters. Hence we need to check for the chip type.
224 */
225static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
226{
f46bf82e
AB		 227 if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742
228 || di->chip == BQ27510)
a66f59ba
SG		 229 return true;
230 return false;
231}
232
b996ad0e 233/*
297a533b 234 * Return the battery Relative State-of-Charge
b996ad0e
RG		 235 * Or < 0 if something fails.
236 */
297a533b 237static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
b996ad0e 238{
297a533b 239 int rsoc;
b996ad0e 240
628ef02c 241 if (di->chip == BQ27500 || di->chip == BQ27742)
297a533b 242 rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
f46bf82e
AB		 243 else if (di->chip == BQ27510)
244 rsoc = bq27x00_read(di, BQ27510_REG_SOC, false);
a66f59ba
SG		 245 else if (di->chip == BQ27425)
246 rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
e20908d9 247 else
297a533b
LPC		 248 rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);
249
250 if (rsoc < 0)
c6cd4f26 251 dev_dbg(di->dev, "error reading relative State-of-Charge\n");
297a533b
LPC		 252
253 return rsoc;
b996ad0e
RG		 254}
255
631c17ee
PR		 256/*
257 * Return a battery charge value in µAh
258 * Or < 0 if something fails.
259 */
260static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
261{
262 int charge;
263
264 charge = bq27x00_read(di, reg, false);
265 if (charge < 0) {
c6cd4f26
PR		 266 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
267 reg, charge);
631c17ee
PR		 268 return charge;
269 }
270
a66f59ba 271 if (bq27xxx_is_chip_version_higher(di))
631c17ee
PR		 272 charge *= 1000;
273 else
274 charge = charge * 3570 / BQ27000_RS;
275
276 return charge;
277}
278
279/*
280 * Return the battery Nominal available capaciy in µAh
281 * Or < 0 if something fails.
282 */
283static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di)
284{
e59ec4a1
PR		 285 int flags;
286 bool is_bq27500 = di->chip == BQ27500;
a3c0c3e7 287 bool is_bq27742 = di->chip == BQ27742;
e59ec4a1 288 bool is_higher = bq27xxx_is_chip_version_higher(di);
a3c0c3e7 289 bool flags_1b = !(is_bq27500 || is_bq27742);
e59ec4a1 290
a3c0c3e7 291 flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
e59ec4a1
PR		 292 if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI))
293 return -ENODATA;
294
631c17ee
PR		 295 return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC);
296}
297
298/*
299 * Return the battery Last measured discharge in µAh
300 * Or < 0 if something fails.
301 */
302static inline int bq27x00_battery_read_lmd(struct bq27x00_device_info *di)
303{
304 return bq27x00_battery_read_charge(di, BQ27x00_REG_LMD);
305}
306
307/*
308 * Return the battery Initial last measured discharge in µAh
309 * Or < 0 if something fails.
310 */
311static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
312{
313 int ilmd;
314
9dbf5a28
EB		 315 if (bq27xxx_is_chip_version_higher(di)) {
316 if (di->chip == BQ27425)
317 ilmd = bq27x00_read(di, BQ27425_REG_DCAP, false);
f46bf82e
AB		 318 else if (di->chip == BQ27510)
319 ilmd = bq27x00_read(di, BQ27510_REG_DCAP, false);
9dbf5a28
EB		 320 else
321 ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
6d0a1815 322 } else {
631c17ee 323 ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
6d0a1815 324 }
631c17ee
PR		 325
326 if (ilmd < 0) {
c6cd4f26 327 dev_dbg(di->dev, "error reading initial last measured discharge\n");
631c17ee
PR		 328 return ilmd;
329 }
330
a66f59ba 331 if (bq27xxx_is_chip_version_higher(di))
631c17ee
PR		 332 ilmd *= 1000;
333 else
334 ilmd = ilmd * 256 * 3570 / BQ27000_RS;
335
336 return ilmd;
337}
338
a8f6bd23
PR		 339/*
340 * Return the battery Available energy in µWh
341 * Or < 0 if something fails.
342 */
343static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
344{
345 int ae;
346
347 ae = bq27x00_read(di, BQ27x00_REG_AE, false);
348 if (ae < 0) {
c6cd4f26 349 dev_dbg(di->dev, "error reading available energy\n");
a8f6bd23
PR		 350 return ae;
351 }
352
353 if (di->chip == BQ27500)
354 ae *= 1000;
355 else
356 ae = ae * 29200 / BQ27000_RS;
357
358 return ae;
359}
360
d149e98e 361/*
5dc3443e 362 * Return the battery temperature in tenths of degree Kelvin
d149e98e
PR		 363 * Or < 0 if something fails.
364 */
365static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
366{
367 int temp;
368
369 temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
370 if (temp < 0) {
371 dev_err(di->dev, "error reading temperature\n");
372 return temp;
373 }
374
5dc3443e
PR		 375 if (!bq27xxx_is_chip_version_higher(di))
376 temp = 5 * temp / 2;
d149e98e
PR		 377
378 return temp;
379}
380
631c17ee
PR		 381/*
382 * Return the battery Cycle count total
383 * Or < 0 if something fails.
384 */
385static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di)
386{
387 int cyct;
388
f46bf82e
AB		 389 if (di->chip == BQ27510)
390 cyct = bq27x00_read(di, BQ27510_REG_CYCT, false);
391 else
392 cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false);
631c17ee
PR		 393 if (cyct < 0)
394 dev_err(di->dev, "error reading cycle count total\n");
395
396 return cyct;
397}
398
b996ad0e 399/*
297a533b
LPC		 400 * Read a time register.
401 * Return < 0 if something fails.
b996ad0e 402 */
297a533b 403static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg)
b996ad0e 404{
297a533b 405 int tval;
b996ad0e 406
297a533b
LPC		 407 tval = bq27x00_read(di, reg, false);
408 if (tval < 0) {
c6cd4f26
PR		 409 dev_dbg(di->dev, "error reading time register %02x: %d\n",
410 reg, tval);
297a533b 411 return tval;
b996ad0e
RG		 412 }
413
297a533b
LPC		 414 if (tval == 65535)
415 return -ENODATA;
416
417 return tval * 60;
418}
419
9903e627
SR		 420/*
421 * Read a power avg register.
422 * Return < 0 if something fails.
423 */
424static int bq27x00_battery_read_pwr_avg(struct bq27x00_device_info *di, u8 reg)
425{
426 int tval;
427
428 tval = bq27x00_read(di, reg, false);
429 if (tval < 0) {
430 dev_err(di->dev, "error reading power avg rgister %02x: %d\n",
431 reg, tval);
432 return tval;
433 }
434
435 if (di->chip == BQ27500)
436 return tval;
437 else
438 return (tval * BQ27x00_POWER_CONSTANT) / BQ27000_RS;
439}
440
441/*
442 * Read flag register.
443 * Return < 0 if something fails.
444 */
445static int bq27x00_battery_read_health(struct bq27x00_device_info *di)
446{
447 int tval;
448
449 tval = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
450 if (tval < 0) {
451 dev_err(di->dev, "error reading flag register:%d\n", tval);
452 return tval;
453 }
454
6d0a1815 455 if (di->chip == BQ27500) {
9903e627
SR		 456 if (tval & BQ27500_FLAG_SOCF)
457 tval = POWER_SUPPLY_HEALTH_DEAD;
458 else if (tval & BQ27500_FLAG_OTC)
459 tval = POWER_SUPPLY_HEALTH_OVERHEAT;
460 else
461 tval = POWER_SUPPLY_HEALTH_GOOD;
462 return tval;
f46bf82e
AB		 463 } else if (di->chip == BQ27510) {
464 if (tval & BQ27500_FLAG_OTC)
465 return POWER_SUPPLY_HEALTH_OVERHEAT;
466 return POWER_SUPPLY_HEALTH_GOOD;
9903e627
SR		 467 } else {
468 if (tval & BQ27000_FLAG_EDV1)
469 tval = POWER_SUPPLY_HEALTH_DEAD;
470 else
471 tval = POWER_SUPPLY_HEALTH_GOOD;
472 return tval;
473 }
474
475 return -1;
476}
477
297a533b
LPC		 478static void bq27x00_update(struct bq27x00_device_info *di)
479{
480 struct bq27x00_reg_cache cache = {0, };
481 bool is_bq27500 = di->chip == BQ27500;
f46bf82e 482 bool is_bq27510 = di->chip == BQ27510;
a66f59ba 483 bool is_bq27425 = di->chip == BQ27425;
628ef02c 484 bool is_bq27742 = di->chip == BQ27742;
a3c0c3e7 485 bool flags_1b = !(is_bq27500 || is_bq27742);
297a533b 486
a3c0c3e7 487 cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
3dd843e1
MB		 488 if ((cache.flags & 0xff) == 0xff)
489 /* read error */
490 cache.flags = -1;
297a533b 491 if (cache.flags >= 0) {
f46bf82e 492 if (!is_bq27500 && !is_bq27425 && !is_bq27742 && !is_bq27510
a66f59ba 493 && (cache.flags & BQ27000_FLAG_CI)) {
c6cd4f26 494 dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
4b226c2c 495 cache.capacity = -ENODATA;
a8f6bd23 496 cache.energy = -ENODATA;
4b226c2c
PR		 497 cache.time_to_empty = -ENODATA;
498 cache.time_to_empty_avg = -ENODATA;
499 cache.time_to_full = -ENODATA;
500 cache.charge_full = -ENODATA;
9903e627 501 cache.health = -ENODATA;
4b226c2c
PR		 502 } else {
503 cache.capacity = bq27x00_battery_read_rsoc(di);
f46bf82e 504 if (is_bq27742 || is_bq27510)
628ef02c
PV		 505 cache.time_to_empty =
506 bq27x00_battery_read_time(di,
507 BQ27x00_REG_TTE);
508 else if (!is_bq27425) {
a66f59ba
SG		 509 cache.energy = bq27x00_battery_read_energy(di);
510 cache.time_to_empty =
511 bq27x00_battery_read_time(di,
512 BQ27x00_REG_TTE);
513 cache.time_to_empty_avg =
514 bq27x00_battery_read_time(di,
515 BQ27x00_REG_TTECP);
516 cache.time_to_full =
517 bq27x00_battery_read_time(di,
518 BQ27x00_REG_TTF);
519 }
a3c0c3e7 520 cache.charge_full = bq27x00_battery_read_lmd(di);
9903e627 521 cache.health = bq27x00_battery_read_health(di);
4b226c2c 522 }
d149e98e 523 cache.temperature = bq27x00_battery_read_temperature(di);
a66f59ba
SG		 524 if (!is_bq27425)
525 cache.cycle_count = bq27x00_battery_read_cyct(di);
628ef02c
PV		 526 if (is_bq27742)
527 cache.power_avg =
528 bq27x00_battery_read_pwr_avg(di,
529 BQ27742_POWER_AVG);
530 else
531 cache.power_avg =
532 bq27x00_battery_read_pwr_avg(di,
533 BQ27x00_POWER_AVG);
297a533b 534
631c17ee
PR		 535 /* We only have to read charge design full once */
536 if (di->charge_design_full <= 0)
537 di->charge_design_full = bq27x00_battery_read_ilmd(di);
297a533b
LPC		 538 }
539
90f04a28 540 if (di->cache.capacity != cache.capacity)
297d716f 541 power_supply_changed(di->bat);
90f04a28
PV		 542
543 if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
544 di->cache = cache;
297a533b
LPC		 545
546 di->last_update = jiffies;
547}
548
740b755a
LPC		 549static void bq27x00_battery_poll(struct work_struct *work)
550{
551 struct bq27x00_device_info *di =
552 container_of(work, struct bq27x00_device_info, work.work);
553
554 bq27x00_update(di);
555
556 if (poll_interval > 0) {
557 /* The timer does not have to be accurate. */
558 set_timer_slack(&di->work.timer, poll_interval * HZ / 4);
559 schedule_delayed_work(&di->work, poll_interval * HZ);
560 }
561}
562
b996ad0e 563/*
bf7d4140 564 * Return the battery average current in µA
b996ad0e
RG		 565 * Note that current can be negative signed as well
566 * Or 0 if something fails.
567 */
297a533b 568static int bq27x00_battery_current(struct bq27x00_device_info *di,
ce33edfa 569 union power_supply_propval *val)
b996ad0e 570{
297a533b 571 int curr;
b68f6216 572 int flags;
b996ad0e 573
b68f6216 574 curr = bq27x00_read(di, BQ27x00_REG_AI, false);
c6cd4f26
PR		 575 if (curr < 0) {
576 dev_err(di->dev, "error reading current\n");
297a533b 577 return curr;
c6cd4f26 578 }
e20908d9 579
a66f59ba 580 if (bq27xxx_is_chip_version_higher(di)) {
e20908d9 581 /* bq27500 returns signed value */
297a533b 582 val->intval = (int)((s16)curr) * 1000;
e20908d9 583 } else {
b68f6216
PR		 584 flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
585 if (flags & BQ27000_FLAG_CHGS) {
e20908d9 586 dev_dbg(di->dev, "negative current!\n");
afbc74fd 587 curr = -curr;
e20908d9 588 }
b996ad0e 589
297a533b 590 val->intval = curr * 3570 / BQ27000_RS;
b996ad0e
RG		 591 }
592
297a533b 593 return 0;
b996ad0e
RG		 594}
595
4e924a81 596static int bq27x00_battery_status(struct bq27x00_device_info *di,
ce33edfa 597 union power_supply_propval *val)
4e924a81 598{
4e924a81 599 int status;
4e924a81 600
a66f59ba 601 if (bq27xxx_is_chip_version_higher(di)) {
297a533b 602 if (di->cache.flags & BQ27500_FLAG_FC)
4e924a81 603 status = POWER_SUPPLY_STATUS_FULL;
b7aaacf5 604 else if (di->cache.flags & BQ27500_FLAG_DSC)
4e924a81 605 status = POWER_SUPPLY_STATUS_DISCHARGING;
270968c0 606 else
b7aaacf5 607 status = POWER_SUPPLY_STATUS_CHARGING;
4e924a81 608 } else {
c1b9ab67
LPC		 609 if (di->cache.flags & BQ27000_FLAG_FC)
610 status = POWER_SUPPLY_STATUS_FULL;
611 else if (di->cache.flags & BQ27000_FLAG_CHGS)
4e924a81 612 status = POWER_SUPPLY_STATUS_CHARGING;
297d716f 613 else if (power_supply_am_i_supplied(di->bat))
c1b9ab67 614 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
4e924a81
GI		 615 else
616 status = POWER_SUPPLY_STATUS_DISCHARGING;
617 }
618
619 val->intval = status;
297a533b 620
4e924a81
GI		 621 return 0;
622}
623
d66bab3f 624static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
ce33edfa 625 union power_supply_propval *val)
d66bab3f
PR		 626{
627 int level;
628
a66f59ba 629 if (bq27xxx_is_chip_version_higher(di)) {
d66bab3f
PR		 630 if (di->cache.flags & BQ27500_FLAG_FC)
631 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
632 else if (di->cache.flags & BQ27500_FLAG_SOC1)
633 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
634 else if (di->cache.flags & BQ27500_FLAG_SOCF)
635 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
636 else
637 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
638 } else {
639 if (di->cache.flags & BQ27000_FLAG_FC)
640 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
641 else if (di->cache.flags & BQ27000_FLAG_EDV1)
642 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
643 else if (di->cache.flags & BQ27000_FLAG_EDVF)
644 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
645 else
646 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
647 }
648
649 val->intval = level;
650
651 return 0;
652}
653
4e924a81 654/*
91fe4d50 655 * Return the battery Voltage in millivolts
297a533b 656 * Or < 0 if something fails.
4e924a81 657 */
297a533b 658static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
ce33edfa 659 union power_supply_propval *val)
4e924a81 660{
297a533b 661 int volt;
4e924a81 662
297a533b 663 volt = bq27x00_read(di, BQ27x00_REG_VOLT, false);
c6cd4f26
PR		 664 if (volt < 0) {
665 dev_err(di->dev, "error reading voltage\n");
297a533b 666 return volt;
c6cd4f26 667 }
4e924a81 668
297a533b
LPC		 669 val->intval = volt * 1000;
670
671 return 0;
672}
673
674static int bq27x00_simple_value(int value,
ce33edfa 675 union power_supply_propval *val)
297a533b
LPC		 676{
677 if (value < 0)
678 return value;
679
680 val->intval = value;
4e924a81 681
4e924a81
GI		 682 return 0;
683}
684
b996ad0e
RG		 685static int bq27x00_battery_get_property(struct power_supply *psy,
686 enum power_supply_property psp,
687 union power_supply_propval *val)
688{
4e924a81 689 int ret = 0;
297d716f 690 struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
3413b4ea 691
740b755a
LPC		 692 mutex_lock(&di->lock);
693 if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
694 cancel_delayed_work_sync(&di->work);
695 bq27x00_battery_poll(&di->work.work);
696 }
697 mutex_unlock(&di->lock);
297a533b
LPC		 698
699 if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
3413b4ea 700 return -ENODEV;
b996ad0e
RG		 701
702 switch (psp) {
4e924a81
GI		 703 case POWER_SUPPLY_PROP_STATUS:
704 ret = bq27x00_battery_status(di, val);
705 break;
b996ad0e 706 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
297a533b 707 ret = bq27x00_battery_voltage(di, val);
3413b4ea 708 break;
b996ad0e 709 case POWER_SUPPLY_PROP_PRESENT:
297a533b 710 val->intval = di->cache.flags < 0 ? 0 : 1;
b996ad0e
RG		 711 break;
712 case POWER_SUPPLY_PROP_CURRENT_NOW:
297a533b 713 ret = bq27x00_battery_current(di, val);
b996ad0e
RG		 714 break;
715 case POWER_SUPPLY_PROP_CAPACITY:
297a533b 716 ret = bq27x00_simple_value(di->cache.capacity, val);
b996ad0e 717 break;
d66bab3f
PR		 718 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
719 ret = bq27x00_battery_capacity_level(di, val);
720 break;
b996ad0e 721 case POWER_SUPPLY_PROP_TEMP:
d149e98e 722 ret = bq27x00_simple_value(di->cache.temperature, val);
5dc3443e
PR		 723 if (ret == 0)
724 val->intval -= 2731;
b996ad0e 725 break;
4e924a81 726 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
297a533b 727 ret = bq27x00_simple_value(di->cache.time_to_empty, val);
4e924a81
GI		 728 break;
729 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
297a533b 730 ret = bq27x00_simple_value(di->cache.time_to_empty_avg, val);
4e924a81
GI		 731 break;
732 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
297a533b 733 ret = bq27x00_simple_value(di->cache.time_to_full, val);
4e924a81 734 break;
5661f334
LPC		 735 case POWER_SUPPLY_PROP_TECHNOLOGY:
736 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
737 break;
631c17ee
PR		 738 case POWER_SUPPLY_PROP_CHARGE_NOW:
739 ret = bq27x00_simple_value(bq27x00_battery_read_nac(di), val);
740 break;
741 case POWER_SUPPLY_PROP_CHARGE_FULL:
742 ret = bq27x00_simple_value(di->cache.charge_full, val);
743 break;
744 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
745 ret = bq27x00_simple_value(di->charge_design_full, val);
746 break;
73c244a8
PR		 747 case POWER_SUPPLY_PROP_CYCLE_COUNT:
748 ret = bq27x00_simple_value(di->cache.cycle_count, val);
631c17ee
PR		 749 break;
750 case POWER_SUPPLY_PROP_ENERGY_NOW:
a8f6bd23 751 ret = bq27x00_simple_value(di->cache.energy, val);
631c17ee 752 break;
9903e627
SR		 753 case POWER_SUPPLY_PROP_POWER_AVG:
754 ret = bq27x00_simple_value(di->cache.power_avg, val);
755 break;
756 case POWER_SUPPLY_PROP_HEALTH:
757 ret = bq27x00_simple_value(di->cache.health, val);
758 break;
db04fc5c
AD		 759 case POWER_SUPPLY_PROP_MANUFACTURER:
760 val->strval = BQ27XXX_MANUFACTURER;
761 break;
b996ad0e
RG		 762 default:
763 return -EINVAL;
764 }
765
4e924a81 766 return ret;
b996ad0e
RG		 767}
768
740b755a
LPC		 769static void bq27x00_external_power_changed(struct power_supply *psy)
770{
297d716f 771 struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
740b755a
LPC		 772
773 cancel_delayed_work_sync(&di->work);
774 schedule_delayed_work(&di->work, 0);
775}
776
297d716f
KK		 777static int bq27x00_powersupply_init(struct bq27x00_device_info *di,
778 const char *name)
b996ad0e 779{
a40402ef 780 int ret;
297d716f
KK		 781 struct power_supply_desc *psy_desc;
782 struct power_supply_config psy_cfg = { .drv_data = di, };
783
784 psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
785 if (!psy_desc)
786 return -ENOMEM;
a40402ef 787
297d716f
KK		 788 psy_desc->name = name;
789 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
a66f59ba 790 if (di->chip == BQ27425) {
297d716f
KK		 791 psy_desc->properties = bq27425_battery_props;
792 psy_desc->num_properties = ARRAY_SIZE(bq27425_battery_props);
628ef02c 793 } else if (di->chip == BQ27742) {
297d716f
KK		 794 psy_desc->properties = bq27742_battery_props;
795 psy_desc->num_properties = ARRAY_SIZE(bq27742_battery_props);
f46bf82e 796 } else if (di->chip == BQ27510) {
297d716f
KK		 797 psy_desc->properties = bq27510_battery_props;
798 psy_desc->num_properties = ARRAY_SIZE(bq27510_battery_props);
a66f59ba 799 } else {
297d716f
KK		 800 psy_desc->properties = bq27x00_battery_props;
801 psy_desc->num_properties = ARRAY_SIZE(bq27x00_battery_props);
a66f59ba 802 }
297d716f
KK		 803 psy_desc->get_property = bq27x00_battery_get_property;
804 psy_desc->external_power_changed = bq27x00_external_power_changed;
740b755a
LPC		 805
806 INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll);
807 mutex_init(&di->lock);
a40402ef 808
297d716f
KK		 809 di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
810 if (IS_ERR(di->bat)) {
811 ret = PTR_ERR(di->bat);
a40402ef
LPC		 812 dev_err(di->dev, "failed to register battery: %d\n", ret);
813 return ret;
814 }
815
816 dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
817
297a533b
LPC		 818 bq27x00_update(di);
819
a40402ef 820 return 0;
b996ad0e
RG		 821}
822
740b755a
LPC		 823static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di)
824{
8cfaaa81
PR		 825 /*
826 * power_supply_unregister call bq27x00_battery_get_property which
827 * call bq27x00_battery_poll.
828 * Make sure that bq27x00_battery_poll will not call
829 * schedule_delayed_work again after unregister (which cause OOPS).
830 */
831 poll_interval = 0;
832
740b755a
LPC		 833 cancel_delayed_work_sync(&di->work);
834
297d716f 835 power_supply_unregister(di->bat);
740b755a
LPC		 836
837 mutex_destroy(&di->lock);
838}
839
7fb7ba58
LPC		 840/* i2c specific code */
841#ifdef CONFIG_BATTERY_BQ27X00_I2C
842
843/* If the system has several batteries we need a different name for each
844 * of them...
b996ad0e 845 */
7fb7ba58
LPC		 846static DEFINE_IDR(battery_id);
847static DEFINE_MUTEX(battery_mutex);
b996ad0e 848
297a533b 849static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)
b996ad0e 850{
a40402ef 851 struct i2c_client *client = to_i2c_client(di->dev);
9e912f45 852 struct i2c_msg msg[2];
b996ad0e 853 unsigned char data[2];
297a533b 854 int ret;
b996ad0e
RG		 855
856 if (!client->adapter)
857 return -ENODEV;
858
9e912f45
GI		 859 msg[0].addr = client->addr;
860 msg[0].flags = 0;
861 msg[0].buf = &reg;
862 msg[0].len = sizeof(reg);
863 msg[1].addr = client->addr;
864 msg[1].flags = I2C_M_RD;
865 msg[1].buf = data;
2ec523a8 866 if (single)
9e912f45 867 msg[1].len = 1;
2ec523a8 868 else
9e912f45 869 msg[1].len = 2;
2ec523a8 870
9e912f45 871 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
2ec523a8
LPC		 872 if (ret < 0)
873 return ret;
874
875 if (!single)
876 ret = get_unaligned_le16(data);
877 else
878 ret = data[0];
b996ad0e 879
297a533b 880 return ret;
b996ad0e
RG		 881}
882
e20908d9 883static int bq27x00_battery_probe(struct i2c_client *client,
b996ad0e
RG		 884 const struct i2c_device_id *id)
885{
886 char *name;
887 struct bq27x00_device_info *di;
b996ad0e
RG		 888 int num;
889 int retval = 0;
890
891 /* Get new ID for the new battery device */
b996ad0e 892 mutex_lock(&battery_mutex);
05e2cefa 893 num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
b996ad0e 894 mutex_unlock(&battery_mutex);
05e2cefa
TH		 895 if (num < 0)
896 return num;
b996ad0e 897
297d716f 898 name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
b996ad0e 899 if (!name) {
b996ad0e 900 retval = -ENOMEM;
297d716f 901 goto batt_failed;
b996ad0e
RG		 902 }
903
1cb82fdb 904 di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
b996ad0e 905 if (!di) {
b996ad0e 906 retval = -ENOMEM;
297d716f 907 goto batt_failed;
b996ad0e 908 }
a40402ef 909
b996ad0e 910 di->id = num;
a40402ef 911 di->dev = &client->dev;
e20908d9 912 di->chip = id->driver_data;
a40402ef 913 di->bus.read = &bq27x00_read_i2c;
b996ad0e 914
297d716f 915 retval = bq27x00_powersupply_init(di, name);
f7760995 916 if (retval)
297d716f 917 goto batt_failed;
b996ad0e
RG		 918
919 i2c_set_clientdata(client, di);
b996ad0e
RG		 920
921 return 0;
922
297d716f 923batt_failed:
b996ad0e
RG		 924 mutex_lock(&battery_mutex);
925 idr_remove(&battery_id, num);
926 mutex_unlock(&battery_mutex);
927
928 return retval;
929}
930
e20908d9 931static int bq27x00_battery_remove(struct i2c_client *client)
b996ad0e
RG		 932{
933 struct bq27x00_device_info *di = i2c_get_clientdata(client);
934
740b755a 935 bq27x00_powersupply_unregister(di);
b996ad0e 936
b996ad0e
RG		 937 mutex_lock(&battery_mutex);
938 idr_remove(&battery_id, di->id);
939 mutex_unlock(&battery_mutex);
940
b996ad0e
RG		 941 return 0;
942}
943
e20908d9
GI		 944static const struct i2c_device_id bq27x00_id[] = {
945 { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */
946 { "bq27500", BQ27500 },
a66f59ba 947 { "bq27425", BQ27425 },
628ef02c 948 { "bq27742", BQ27742 },
f46bf82e 949 { "bq27510", BQ27510 },
b996ad0e
RG		 950 {},
951};
fd9b958c 952MODULE_DEVICE_TABLE(i2c, bq27x00_id);
b996ad0e 953
e20908d9 954static struct i2c_driver bq27x00_battery_driver = {
b996ad0e 955 .driver = {
e20908d9 956 .name = "bq27x00-battery",
b996ad0e 957 },
e20908d9
GI		 958 .probe = bq27x00_battery_probe,
959 .remove = bq27x00_battery_remove,
960 .id_table = bq27x00_id,
b996ad0e
RG		 961};
962
7fb7ba58
LPC		 963static inline int bq27x00_battery_i2c_init(void)
964{
965 int ret = i2c_add_driver(&bq27x00_battery_driver);
6d0a1815 966
7fb7ba58 967 if (ret)
6d0a1815 968 pr_err("Unable to register BQ27x00 i2c driver\n");
7fb7ba58
LPC		 969
970 return ret;
971}
972
973static inline void bq27x00_battery_i2c_exit(void)
974{
975 i2c_del_driver(&bq27x00_battery_driver);
976}
977
978#else
979
980static inline int bq27x00_battery_i2c_init(void) { return 0; }
981static inline void bq27x00_battery_i2c_exit(void) {};
982
983#endif
984
985/* platform specific code */
986#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM
987
988static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg,
ce33edfa 989 bool single)
7fb7ba58
LPC		 990{
991 struct device *dev = di->dev;
992 struct bq27000_platform_data *pdata = dev->platform_data;
993 unsigned int timeout = 3;
994 int upper, lower;
995 int temp;
996
997 if (!single) {
998 /* Make sure the value has not changed in between reading the
999 * lower and the upper part */
1000 upper = pdata->read(dev, reg + 1);
1001 do {
1002 temp = upper;
1003 if (upper < 0)
1004 return upper;
1005
1006 lower = pdata->read(dev, reg);
1007 if (lower < 0)
1008 return lower;
1009
1010 upper = pdata->read(dev, reg + 1);
1011 } while (temp != upper && --timeout);
1012
1013 if (timeout == 0)
1014 return -EIO;
1015
297a533b 1016 return (upper << 8) | lower;
7fb7ba58 1017 }
297a533b
LPC		 1018
1019 return pdata->read(dev, reg);
7fb7ba58
LPC		 1020}
1021
c8afa640 1022static int bq27000_battery_probe(struct platform_device *pdev)
7fb7ba58
LPC		 1023{
1024 struct bq27x00_device_info *di;
1025 struct bq27000_platform_data *pdata = pdev->dev.platform_data;
297d716f 1026 const char *name;
7fb7ba58
LPC		 1027
1028 if (!pdata) {
1029 dev_err(&pdev->dev, "no platform_data supplied\n");
1030 return -EINVAL;
1031 }
1032
1033 if (!pdata->read) {
1034 dev_err(&pdev->dev, "no hdq read callback supplied\n");
1035 return -EINVAL;
1036 }
1037
1cb82fdb 1038 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
6d0a1815 1039 if (!di)
7fb7ba58 1040 return -ENOMEM;
7fb7ba58
LPC		 1041
1042 platform_set_drvdata(pdev, di);
1043
1044 di->dev = &pdev->dev;
1045 di->chip = BQ27000;
1046
297d716f 1047 name = pdata->name ?: dev_name(&pdev->dev);
7fb7ba58
LPC		 1048 di->bus.read = &bq27000_read_platform;
1049
297d716f 1050 return bq27x00_powersupply_init(di, name);
7fb7ba58
LPC		 1051}
1052
415ec69f 1053static int bq27000_battery_remove(struct platform_device *pdev)
7fb7ba58
LPC		 1054{
1055 struct bq27x00_device_info *di = platform_get_drvdata(pdev);
1056
740b755a
LPC		 1057 bq27x00_powersupply_unregister(di);
1058
7fb7ba58
LPC		 1059 return 0;
1060}
1061
1062static struct platform_driver bq27000_battery_driver = {
1063 .probe = bq27000_battery_probe,
28ea73f4 1064 .remove = bq27000_battery_remove,
7fb7ba58
LPC		 1065 .driver = {
1066 .name = "bq27000-battery",
7fb7ba58
LPC		 1067 },
1068};
1069
1070static inline int bq27x00_battery_platform_init(void)
1071{
1072 int ret = platform_driver_register(&bq27000_battery_driver);
6d0a1815 1073
7fb7ba58 1074 if (ret)
6d0a1815 1075 pr_err("Unable to register BQ27000 platform driver\n");
7fb7ba58
LPC		 1076
1077 return ret;
1078}
1079
1080static inline void bq27x00_battery_platform_exit(void)
1081{
1082 platform_driver_unregister(&bq27000_battery_driver);
1083}
1084
1085#else
1086
1087static inline int bq27x00_battery_platform_init(void) { return 0; }
1088static inline void bq27x00_battery_platform_exit(void) {};
1089
1090#endif
1091
1092/*
1093 * Module stuff
1094 */
1095
b996ad0e
RG		 1096static int __init bq27x00_battery_init(void)
1097{
1098 int ret;
1099
7fb7ba58
LPC		 1100 ret = bq27x00_battery_i2c_init();
1101 if (ret)
1102 return ret;
1103
1104 ret = bq27x00_battery_platform_init();
b996ad0e 1105 if (ret)
7fb7ba58 1106 bq27x00_battery_i2c_exit();
b996ad0e
RG		 1107
1108 return ret;
1109}
1110module_init(bq27x00_battery_init);
1111
1112static void __exit bq27x00_battery_exit(void)
1113{
7fb7ba58
LPC		 1114 bq27x00_battery_platform_exit();
1115 bq27x00_battery_i2c_exit();
b996ad0e
RG		 1116}
1117module_exit(bq27x00_battery_exit);
1118
8ebb7e9c
MB		 1119#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM
1120MODULE_ALIAS("platform:bq27000-battery");
1121#endif
1122
1123#ifdef CONFIG_BATTERY_BQ27X00_I2C
1124MODULE_ALIAS("i2c:bq27000-battery");
1125#endif
1126
b996ad0e
RG		 1127MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1128MODULE_DESCRIPTION("BQ27x00 battery monitor driver");
1129MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)