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drivers: power: twl4030_charger: fix link problems when building as module
[deliverable/linux.git] / drivers / power / bq27xxx_battery.c
CommitLineData
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		 81struct bq27xxx_device_info;
82struct 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 */
93enum 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 113struct 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 127struct 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 */
148static 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
168static 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
188static 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		 208static 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
228static 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
248static 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
268static 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
288static 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
298static 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 320static 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 340static 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
358static 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 376static 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		 395static 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
413static 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
434static 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		 447static unsigned int poll_interval = 360;
448module_param(poll_interval, uint, 0644);
6d0a1815
AD		 449MODULE_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 456static 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 470static 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 486static 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 509static 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 526static 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 535static 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 558static 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 580static 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 600static 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 615static 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 636static 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 656static 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 */
669static 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 */
680static 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 692static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
9903e627 693{
74aab849 694 u16 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 713static 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
8807feb9
AD		 765static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
766{
767 struct bq27xxx_device_info *di = data;
768
769 bq27xxx_battery_update(di);
770
771 return IRQ_HANDLED;
772}
773
081bab21 774static void bq27xxx_battery_poll(struct work_struct *work)
740b755a 775{
081bab21 776 struct bq27xxx_device_info *di =
d74534c2
AD		 777 container_of(work, struct bq27xxx_device_info,
778 work.work);
740b755a 779
081bab21 780 bq27xxx_battery_update(di);
740b755a
LPC		 781
782 if (poll_interval > 0) {
783 /* The timer does not have to be accurate. */
784 set_timer_slack(&di->work.timer, poll_interval * HZ / 4);
785 schedule_delayed_work(&di->work, poll_interval * HZ);
786 }
787}
788
b996ad0e 789/*
bf7d4140 790 * Return the battery average current in µA
b996ad0e
RG		 791 * Note that current can be negative signed as well
792 * Or 0 if something fails.
793 */
081bab21 794static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
ce33edfa 795 union power_supply_propval *val)
b996ad0e 796{
297a533b 797 int curr;
b68f6216 798 int flags;
b996ad0e 799
d74534c2 800 curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
c6cd4f26
PR		 801 if (curr < 0) {
802 dev_err(di->dev, "error reading current\n");
297a533b 803 return curr;
c6cd4f26 804 }
e20908d9 805
d74534c2
AD		 806 if (di->chip == BQ27000 || di->chip == BQ27010) {
807 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
b68f6216 808 if (flags & BQ27000_FLAG_CHGS) {
e20908d9 809 dev_dbg(di->dev, "negative current!\n");
afbc74fd 810 curr = -curr;
e20908d9 811 }
b996ad0e 812
d74534c2
AD		 813 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
814 } else {
815 /* Other gauges return signed value */
816 val->intval = (int)((s16)curr) * 1000;
b996ad0e
RG		 817 }
818
297a533b 819 return 0;
b996ad0e
RG		 820}
821
081bab21 822static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
ce33edfa 823 union power_supply_propval *val)
4e924a81 824{
4e924a81 825 int status;
4e924a81 826
d74534c2 827 if (di->chip == BQ27000 || di->chip == BQ27010) {
c1b9ab67
LPC		 828 if (di->cache.flags & BQ27000_FLAG_FC)
829 status = POWER_SUPPLY_STATUS_FULL;
830 else if (di->cache.flags & BQ27000_FLAG_CHGS)
4e924a81 831 status = POWER_SUPPLY_STATUS_CHARGING;
297d716f 832 else if (power_supply_am_i_supplied(di->bat))
c1b9ab67 833 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
4e924a81
GI		 834 else
835 status = POWER_SUPPLY_STATUS_DISCHARGING;
d74534c2
AD		 836 } else {
837 if (di->cache.flags & BQ27XXX_FLAG_FC)
838 status = POWER_SUPPLY_STATUS_FULL;
839 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
840 status = POWER_SUPPLY_STATUS_DISCHARGING;
841 else
842 status = POWER_SUPPLY_STATUS_CHARGING;
4e924a81
GI		 843 }
844
845 val->intval = status;
297a533b 846
4e924a81
GI		 847 return 0;
848}
849
081bab21 850static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
ce33edfa 851 union power_supply_propval *val)
d66bab3f
PR		 852{
853 int level;
854
d74534c2
AD		 855 if (di->chip == BQ27000 || di->chip == BQ27010) {
856 if (di->cache.flags & BQ27000_FLAG_FC)
d66bab3f 857 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
d74534c2 858 else if (di->cache.flags & BQ27000_FLAG_EDV1)
d66bab3f 859 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
d74534c2 860 else if (di->cache.flags & BQ27000_FLAG_EDVF)
d66bab3f
PR		 861 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
862 else
863 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
864 } else {
d74534c2 865 if (di->cache.flags & BQ27XXX_FLAG_FC)
d66bab3f 866 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
d74534c2 867 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
d66bab3f 868 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
d74534c2 869 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
d66bab3f
PR		 870 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
871 else
872 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
873 }
874
875 val->intval = level;
876
877 return 0;
878}
879
4e924a81 880/*
91fe4d50 881 * Return the battery Voltage in millivolts
297a533b 882 * Or < 0 if something fails.
4e924a81 883 */
081bab21 884static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
ce33edfa 885 union power_supply_propval *val)
4e924a81 886{
297a533b 887 int volt;
4e924a81 888
d74534c2 889 volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
c6cd4f26
PR		 890 if (volt < 0) {
891 dev_err(di->dev, "error reading voltage\n");
297a533b 892 return volt;
c6cd4f26 893 }
4e924a81 894
297a533b
LPC		 895 val->intval = volt * 1000;
896
897 return 0;
898}
899
081bab21 900static int bq27xxx_simple_value(int value,
ce33edfa 901 union power_supply_propval *val)
297a533b
LPC		 902{
903 if (value < 0)
904 return value;
905
906 val->intval = value;
4e924a81 907
4e924a81
GI		 908 return 0;
909}
910
081bab21 911static int bq27xxx_battery_get_property(struct power_supply *psy,
b996ad0e
RG		 912 enum power_supply_property psp,
913 union power_supply_propval *val)
914{
4e924a81 915 int ret = 0;
081bab21 916 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
3413b4ea 917
740b755a
LPC		 918 mutex_lock(&di->lock);
919 if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
920 cancel_delayed_work_sync(&di->work);
081bab21 921 bq27xxx_battery_poll(&di->work.work);
740b755a
LPC		 922 }
923 mutex_unlock(&di->lock);
297a533b
LPC		 924
925 if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
3413b4ea 926 return -ENODEV;
b996ad0e
RG		 927
928 switch (psp) {
4e924a81 929 case POWER_SUPPLY_PROP_STATUS:
081bab21 930 ret = bq27xxx_battery_status(di, val);
4e924a81 931 break;
b996ad0e 932 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
081bab21 933 ret = bq27xxx_battery_voltage(di, val);
3413b4ea 934 break;
b996ad0e 935 case POWER_SUPPLY_PROP_PRESENT:
297a533b 936 val->intval = di->cache.flags < 0 ? 0 : 1;
b996ad0e
RG		 937 break;
938 case POWER_SUPPLY_PROP_CURRENT_NOW:
081bab21 939 ret = bq27xxx_battery_current(di, val);
b996ad0e
RG		 940 break;
941 case POWER_SUPPLY_PROP_CAPACITY:
081bab21 942 ret = bq27xxx_simple_value(di->cache.capacity, val);
b996ad0e 943 break;
d66bab3f 944 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
081bab21 945 ret = bq27xxx_battery_capacity_level(di, val);
d66bab3f 946 break;
b996ad0e 947 case POWER_SUPPLY_PROP_TEMP:
081bab21 948 ret = bq27xxx_simple_value(di->cache.temperature, val);
5dc3443e 949 if (ret == 0)
d74534c2 950 val->intval -= 2731; /* convert decidegree k to c */
b996ad0e 951 break;
4e924a81 952 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
081bab21 953 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
4e924a81
GI		 954 break;
955 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
081bab21 956 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
4e924a81
GI		 957 break;
958 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
081bab21 959 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
4e924a81 960 break;
5661f334
LPC		 961 case POWER_SUPPLY_PROP_TECHNOLOGY:
962 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
963 break;
631c17ee 964 case POWER_SUPPLY_PROP_CHARGE_NOW:
081bab21 965 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
631c17ee
PR		 966 break;
967 case POWER_SUPPLY_PROP_CHARGE_FULL:
081bab21 968 ret = bq27xxx_simple_value(di->cache.charge_full, val);
631c17ee
PR		 969 break;
970 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
081bab21 971 ret = bq27xxx_simple_value(di->charge_design_full, val);
631c17ee 972 break;
73c244a8 973 case POWER_SUPPLY_PROP_CYCLE_COUNT:
081bab21 974 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
631c17ee
PR		 975 break;
976 case POWER_SUPPLY_PROP_ENERGY_NOW:
081bab21 977 ret = bq27xxx_simple_value(di->cache.energy, val);
631c17ee 978 break;
9903e627 979 case POWER_SUPPLY_PROP_POWER_AVG:
081bab21 980 ret = bq27xxx_simple_value(di->cache.power_avg, val);
9903e627
SR		 981 break;
982 case POWER_SUPPLY_PROP_HEALTH:
081bab21 983 ret = bq27xxx_simple_value(di->cache.health, val);
9903e627 984 break;
db04fc5c
AD		 985 case POWER_SUPPLY_PROP_MANUFACTURER:
986 val->strval = BQ27XXX_MANUFACTURER;
987 break;
b996ad0e
RG		 988 default:
989 return -EINVAL;
990 }
991
4e924a81 992 return ret;
b996ad0e
RG		 993}
994
081bab21 995static void bq27xxx_external_power_changed(struct power_supply *psy)
740b755a 996{
081bab21 997 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
740b755a
LPC		 998
999 cancel_delayed_work_sync(&di->work);
1000 schedule_delayed_work(&di->work, 0);
1001}
1002
081bab21 1003static int bq27xxx_powersupply_init(struct bq27xxx_device_info *di,
297d716f 1004 const char *name)
b996ad0e 1005{
a40402ef 1006 int ret;
297d716f
KK		 1007 struct power_supply_desc *psy_desc;
1008 struct power_supply_config psy_cfg = { .drv_data = di, };
1009
1010 psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1011 if (!psy_desc)
1012 return -ENOMEM;
a40402ef 1013
297d716f
KK		 1014 psy_desc->name = name;
1015 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
d74534c2
AD		 1016 psy_desc->properties = bq27xxx_battery_props[di->chip].props;
1017 psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
081bab21
AD		 1018 psy_desc->get_property = bq27xxx_battery_get_property;
1019 psy_desc->external_power_changed = bq27xxx_external_power_changed;
740b755a 1020
081bab21 1021 INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
740b755a 1022 mutex_init(&di->lock);
a40402ef 1023
297d716f
KK		 1024 di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1025 if (IS_ERR(di->bat)) {
1026 ret = PTR_ERR(di->bat);
a40402ef
LPC		 1027 dev_err(di->dev, "failed to register battery: %d\n", ret);
1028 return ret;
1029 }
1030
1031 dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
1032
081bab21 1033 bq27xxx_battery_update(di);
297a533b 1034
a40402ef 1035 return 0;
b996ad0e
RG		 1036}
1037
081bab21 1038static void bq27xxx_powersupply_unregister(struct bq27xxx_device_info *di)
740b755a 1039{
8cfaaa81 1040 /*
081bab21
AD		 1041 * power_supply_unregister call bq27xxx_battery_get_property which
1042 * call bq27xxx_battery_poll.
1043 * Make sure that bq27xxx_battery_poll will not call
8cfaaa81
PR		 1044 * schedule_delayed_work again after unregister (which cause OOPS).
1045 */
1046 poll_interval = 0;
1047
740b755a
LPC		 1048 cancel_delayed_work_sync(&di->work);
1049
297d716f 1050 power_supply_unregister(di->bat);
740b755a
LPC		 1051
1052 mutex_destroy(&di->lock);
1053}
1054
7fb7ba58 1055/* i2c specific code */
081bab21 1056#ifdef CONFIG_BATTERY_BQ27XXX_I2C
7fb7ba58
LPC		 1057
1058/* If the system has several batteries we need a different name for each
1059 * of them...
b996ad0e 1060 */
7fb7ba58
LPC		 1061static DEFINE_IDR(battery_id);
1062static DEFINE_MUTEX(battery_mutex);
b996ad0e 1063
081bab21
AD		 1064static 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 = &reg;
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		 1099static 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 1156batt_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 1164static 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 1177static 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 1196MODULE_DEVICE_TABLE(i2c, bq27xxx_id);
b996ad0e 1197
081bab21 1198static 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 1207static 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 1217static 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		 1224static inline int bq27xxx_battery_i2c_init(void) { return 0; }
1225static 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		 1232static 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 1266static 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;
7fb7ba58 1295
297d716f 1296 name = pdata->name ?: dev_name(&pdev->dev);
081bab21 1297 di->bus.read = &bq27xxx_battery_platform_read;
7fb7ba58 1298
081bab21 1299 return bq27xxx_powersupply_init(di, name);
7fb7ba58
LPC		 1300}
1301
081bab21 1302static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
7fb7ba58 1303{
081bab21 1304 struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
7fb7ba58 1305
081bab21 1306 bq27xxx_powersupply_unregister(di);
740b755a 1307
7fb7ba58
LPC		 1308 return 0;
1309}
1310
081bab21
AD		 1311static struct platform_driver bq27xxx_battery_platform_driver = {
1312 .probe = bq27xxx_battery_platform_probe,
1313 .remove = bq27xxx_battery_platform_remove,
7fb7ba58
LPC		 1314 .driver = {
1315 .name = "bq27000-battery",
7fb7ba58
LPC		 1316 },
1317};
1318
081bab21 1319static inline int bq27xxx_battery_platform_init(void)
7fb7ba58 1320{
081bab21 1321 int ret = platform_driver_register(&bq27xxx_battery_platform_driver);
6d0a1815 1322
7fb7ba58 1323 if (ret)
081bab21 1324 pr_err("Unable to register BQ27xxx platform driver\n");
7fb7ba58
LPC		 1325
1326 return ret;
1327}
1328
081bab21 1329static inline void bq27xxx_battery_platform_exit(void)
7fb7ba58 1330{
081bab21 1331 platform_driver_unregister(&bq27xxx_battery_platform_driver);
7fb7ba58
LPC		 1332}
1333
1334#else
1335
081bab21
AD		 1336static inline int bq27xxx_battery_platform_init(void) { return 0; }
1337static inline void bq27xxx_battery_platform_exit(void) {};
7fb7ba58
LPC		 1338
1339#endif
1340
1341/*
1342 * Module stuff
1343 */
1344
081bab21 1345static int __init bq27xxx_battery_init(void)
b996ad0e
RG		 1346{
1347 int ret;
1348
081bab21 1349 ret = bq27xxx_battery_i2c_init();
7fb7ba58
LPC		 1350 if (ret)
1351 return ret;
1352
081bab21 1353 ret = bq27xxx_battery_platform_init();
b996ad0e 1354 if (ret)
081bab21 1355 bq27xxx_battery_i2c_exit();
b996ad0e
RG		 1356
1357 return ret;
1358}
081bab21 1359module_init(bq27xxx_battery_init);
b996ad0e 1360
081bab21 1361static void __exit bq27xxx_battery_exit(void)
b996ad0e 1362{
081bab21
AD		 1363 bq27xxx_battery_platform_exit();
1364 bq27xxx_battery_i2c_exit();
b996ad0e 1365}
081bab21 1366module_exit(bq27xxx_battery_exit);
b996ad0e 1367
081bab21 1368#ifdef CONFIG_BATTERY_BQ27XXX_PLATFORM
8ebb7e9c
MB		 1369MODULE_ALIAS("platform:bq27000-battery");
1370#endif
1371
b996ad0e 1372MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
081bab21 1373MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
b996ad0e 1374MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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