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> | |
5a0e3ad6 | 48 | #include <linux/slab.h> |
b996ad0e | 49 | |
081bab21 | 50 | #include <linux/power/bq27xxx_battery.h> |
7fb7ba58 | 51 | |
6eb207f2 | 52 | #define DRIVER_VERSION "1.2.0" |
b996ad0e | 53 | |
db04fc5c AD |
54 | #define BQ27XXX_MANUFACTURER "Texas Instruments" |
55 | ||
d74534c2 AD |
56 | /* BQ27XXX Flags */ |
57 | #define BQ27XXX_FLAG_DSC BIT(0) | |
58 | #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ | |
59 | #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
60 | #define BQ27XXX_FLAG_FC BIT(9) | |
61 | #define BQ27XXX_FLAG_OTD BIT(14) | |
62 | #define BQ27XXX_FLAG_OTC BIT(15) | |
74aab849 AD |
63 | #define BQ27XXX_FLAG_UT BIT(14) |
64 | #define BQ27XXX_FLAG_OT BIT(15) | |
d74534c2 AD |
65 | |
66 | /* BQ27000 has different layout for Flags register */ | |
6eb207f2 AD |
67 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
68 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
69 | #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ | |
70 | #define BQ27000_FLAG_FC BIT(5) | |
71 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ | |
72 | ||
d74534c2 AD |
73 | #define BQ27XXX_RS (20) /* Resistor sense mOhm */ |
74 | #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */ | |
75 | #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */ | |
a2e5118c | 76 | |
d74534c2 AD |
77 | #define INVALID_REG_ADDR 0xff |
78 | ||
79 | /* | |
80 | * bq27xxx_reg_index - Register names | |
81 | * | |
82 | * These are indexes into a device's register mapping array. | |
83 | */ | |
84 | enum bq27xxx_reg_index { | |
85 | BQ27XXX_REG_CTRL = 0, /* Control */ | |
86 | BQ27XXX_REG_TEMP, /* Temperature */ | |
87 | BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ | |
88 | BQ27XXX_REG_VOLT, /* Voltage */ | |
89 | BQ27XXX_REG_AI, /* Average Current */ | |
90 | BQ27XXX_REG_FLAGS, /* Flags */ | |
91 | BQ27XXX_REG_TTE, /* Time-to-Empty */ | |
92 | BQ27XXX_REG_TTF, /* Time-to-Full */ | |
93 | BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ | |
94 | BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ | |
95 | BQ27XXX_REG_NAC, /* Nominal Available Capacity */ | |
96 | BQ27XXX_REG_FCC, /* Full Charge Capacity */ | |
97 | BQ27XXX_REG_CYCT, /* Cycle Count */ | |
98 | BQ27XXX_REG_AE, /* Available Energy */ | |
99 | BQ27XXX_REG_SOC, /* State-of-Charge */ | |
100 | BQ27XXX_REG_DCAP, /* Design Capacity */ | |
101 | BQ27XXX_REG_AP, /* Average Power */ | |
102 | }; | |
103 | ||
d74534c2 AD |
104 | /* Register mappings */ |
105 | static u8 bq27000_regs[] = { | |
106 | 0x00, /* CONTROL */ | |
107 | 0x06, /* TEMP */ | |
108 | INVALID_REG_ADDR, /* INT TEMP - NA*/ | |
109 | 0x08, /* VOLT */ | |
110 | 0x14, /* AVG CURR */ | |
111 | 0x0a, /* FLAGS */ | |
112 | 0x16, /* TTE */ | |
113 | 0x18, /* TTF */ | |
114 | 0x1c, /* TTES */ | |
115 | 0x26, /* TTECP */ | |
116 | 0x0c, /* NAC */ | |
117 | 0x12, /* LMD(FCC) */ | |
118 | 0x2a, /* CYCT */ | |
119 | 0x22, /* AE */ | |
120 | 0x0b, /* SOC(RSOC) */ | |
121 | 0x76, /* DCAP(ILMD) */ | |
122 | 0x24, /* AP */ | |
123 | }; | |
124 | ||
125 | static u8 bq27010_regs[] = { | |
126 | 0x00, /* CONTROL */ | |
127 | 0x06, /* TEMP */ | |
128 | INVALID_REG_ADDR, /* INT TEMP - NA*/ | |
129 | 0x08, /* VOLT */ | |
130 | 0x14, /* AVG CURR */ | |
131 | 0x0a, /* FLAGS */ | |
132 | 0x16, /* TTE */ | |
133 | 0x18, /* TTF */ | |
134 | 0x1c, /* TTES */ | |
135 | 0x26, /* TTECP */ | |
136 | 0x0c, /* NAC */ | |
137 | 0x12, /* LMD(FCC) */ | |
138 | 0x2a, /* CYCT */ | |
139 | INVALID_REG_ADDR, /* AE - NA */ | |
140 | 0x0b, /* SOC(RSOC) */ | |
141 | 0x76, /* DCAP(ILMD) */ | |
142 | INVALID_REG_ADDR, /* AP - NA */ | |
143 | }; | |
144 | ||
145 | static u8 bq27500_regs[] = { | |
146 | 0x00, /* CONTROL */ | |
147 | 0x06, /* TEMP */ | |
148 | 0x28, /* INT TEMP */ | |
149 | 0x08, /* VOLT */ | |
150 | 0x14, /* AVG CURR */ | |
151 | 0x0a, /* FLAGS */ | |
152 | 0x16, /* TTE */ | |
153 | INVALID_REG_ADDR, /* TTF - NA */ | |
154 | 0x1a, /* TTES */ | |
155 | INVALID_REG_ADDR, /* TTECP - NA */ | |
156 | 0x0c, /* NAC */ | |
157 | 0x12, /* LMD(FCC) */ | |
099867a1 | 158 | 0x2a, /* CYCT */ |
d74534c2 | 159 | INVALID_REG_ADDR, /* AE - NA */ |
099867a1 NS |
160 | 0x2c, /* SOC(RSOC) */ |
161 | 0x3c, /* DCAP(ILMD) */ | |
d74534c2 | 162 | INVALID_REG_ADDR, /* AP - NA */ |
b996ad0e RG |
163 | }; |
164 | ||
d74534c2 AD |
165 | static u8 bq27530_regs[] = { |
166 | 0x00, /* CONTROL */ | |
167 | 0x06, /* TEMP */ | |
168 | 0x32, /* INT TEMP */ | |
169 | 0x08, /* VOLT */ | |
170 | 0x14, /* AVG CURR */ | |
171 | 0x0a, /* FLAGS */ | |
172 | 0x16, /* TTE */ | |
173 | INVALID_REG_ADDR, /* TTF - NA */ | |
174 | INVALID_REG_ADDR, /* TTES - NA */ | |
175 | INVALID_REG_ADDR, /* TTECP - NA */ | |
176 | 0x0c, /* NAC */ | |
177 | 0x12, /* LMD(FCC) */ | |
178 | 0x2a, /* CYCT */ | |
179 | INVALID_REG_ADDR, /* AE - NA */ | |
180 | 0x2c, /* SOC(RSOC) */ | |
181 | INVALID_REG_ADDR, /* DCAP - NA */ | |
182 | 0x24, /* AP */ | |
183 | }; | |
184 | ||
185 | static u8 bq27541_regs[] = { | |
186 | 0x00, /* CONTROL */ | |
187 | 0x06, /* TEMP */ | |
188 | 0x28, /* INT TEMP */ | |
189 | 0x08, /* VOLT */ | |
190 | 0x14, /* AVG CURR */ | |
191 | 0x0a, /* FLAGS */ | |
192 | 0x16, /* TTE */ | |
193 | INVALID_REG_ADDR, /* TTF - NA */ | |
194 | INVALID_REG_ADDR, /* TTES - NA */ | |
195 | INVALID_REG_ADDR, /* TTECP - NA */ | |
196 | 0x0c, /* NAC */ | |
197 | 0x12, /* LMD(FCC) */ | |
198 | 0x2a, /* CYCT */ | |
199 | INVALID_REG_ADDR, /* AE - NA */ | |
200 | 0x2c, /* SOC(RSOC) */ | |
201 | 0x3c, /* DCAP */ | |
265b6049 | 202 | 0x24, /* AP */ |
d74534c2 AD |
203 | }; |
204 | ||
205 | static u8 bq27545_regs[] = { | |
206 | 0x00, /* CONTROL */ | |
207 | 0x06, /* TEMP */ | |
208 | 0x28, /* INT TEMP */ | |
209 | 0x08, /* VOLT */ | |
210 | 0x14, /* AVG CURR */ | |
211 | 0x0a, /* FLAGS */ | |
212 | 0x16, /* TTE */ | |
213 | INVALID_REG_ADDR, /* TTF - NA */ | |
214 | INVALID_REG_ADDR, /* TTES - NA */ | |
215 | INVALID_REG_ADDR, /* TTECP - NA */ | |
216 | 0x0c, /* NAC */ | |
217 | 0x12, /* LMD(FCC) */ | |
218 | 0x2a, /* CYCT */ | |
219 | INVALID_REG_ADDR, /* AE - NA */ | |
220 | 0x2c, /* SOC(RSOC) */ | |
221 | INVALID_REG_ADDR, /* DCAP - NA */ | |
222 | 0x24, /* AP */ | |
223 | }; | |
224 | ||
225 | static u8 bq27421_regs[] = { | |
226 | 0x00, /* CONTROL */ | |
227 | 0x02, /* TEMP */ | |
228 | 0x1e, /* INT TEMP */ | |
229 | 0x04, /* VOLT */ | |
230 | 0x10, /* AVG CURR */ | |
231 | 0x06, /* FLAGS */ | |
232 | INVALID_REG_ADDR, /* TTE - NA */ | |
233 | INVALID_REG_ADDR, /* TTF - NA */ | |
234 | INVALID_REG_ADDR, /* TTES - NA */ | |
235 | INVALID_REG_ADDR, /* TTECP - NA */ | |
236 | 0x08, /* NAC */ | |
237 | 0x0e, /* FCC */ | |
238 | INVALID_REG_ADDR, /* CYCT - NA */ | |
239 | INVALID_REG_ADDR, /* AE - NA */ | |
240 | 0x1c, /* SOC */ | |
241 | 0x3c, /* DCAP */ | |
242 | 0x18, /* AP */ | |
243 | }; | |
244 | ||
245 | static u8 *bq27xxx_regs[] = { | |
246 | [BQ27000] = bq27000_regs, | |
247 | [BQ27010] = bq27010_regs, | |
248 | [BQ27500] = bq27500_regs, | |
249 | [BQ27530] = bq27530_regs, | |
250 | [BQ27541] = bq27541_regs, | |
251 | [BQ27545] = bq27545_regs, | |
252 | [BQ27421] = bq27421_regs, | |
253 | }; | |
254 | ||
255 | static enum power_supply_property bq27000_battery_props[] = { | |
4e924a81 | 256 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
257 | POWER_SUPPLY_PROP_PRESENT, |
258 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
259 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
260 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 261 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 262 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
263 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
264 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
265 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 266 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
267 | POWER_SUPPLY_PROP_CHARGE_FULL, |
268 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
269 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 270 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 271 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
272 | POWER_SUPPLY_PROP_POWER_AVG, |
273 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 274 | POWER_SUPPLY_PROP_MANUFACTURER, |
b996ad0e RG |
275 | }; |
276 | ||
d74534c2 | 277 | static enum power_supply_property bq27010_battery_props[] = { |
a66f59ba SG |
278 | POWER_SUPPLY_PROP_STATUS, |
279 | POWER_SUPPLY_PROP_PRESENT, | |
280 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
281 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
282 | POWER_SUPPLY_PROP_CAPACITY, | |
283 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
284 | POWER_SUPPLY_PROP_TEMP, | |
d74534c2 AD |
285 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
286 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
287 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
a66f59ba SG |
288 | POWER_SUPPLY_PROP_TECHNOLOGY, |
289 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
290 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
291 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
d74534c2 AD |
292 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
293 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 294 | POWER_SUPPLY_PROP_MANUFACTURER, |
a66f59ba SG |
295 | }; |
296 | ||
d74534c2 | 297 | static enum power_supply_property bq27500_battery_props[] = { |
628ef02c PV |
298 | POWER_SUPPLY_PROP_STATUS, |
299 | POWER_SUPPLY_PROP_PRESENT, | |
300 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
301 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
302 | POWER_SUPPLY_PROP_CAPACITY, | |
303 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
304 | POWER_SUPPLY_PROP_TEMP, | |
305 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
306 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
307 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
308 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
309 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
310 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
d74534c2 AD |
311 | POWER_SUPPLY_PROP_HEALTH, |
312 | POWER_SUPPLY_PROP_MANUFACTURER, | |
313 | }; | |
314 | ||
315 | static enum power_supply_property bq27530_battery_props[] = { | |
316 | POWER_SUPPLY_PROP_STATUS, | |
317 | POWER_SUPPLY_PROP_PRESENT, | |
318 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
319 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
320 | POWER_SUPPLY_PROP_CAPACITY, | |
321 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
322 | POWER_SUPPLY_PROP_TEMP, | |
323 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
324 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
325 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
326 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
628ef02c PV |
327 | POWER_SUPPLY_PROP_POWER_AVG, |
328 | POWER_SUPPLY_PROP_HEALTH, | |
d74534c2 | 329 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
db04fc5c | 330 | POWER_SUPPLY_PROP_MANUFACTURER, |
628ef02c PV |
331 | }; |
332 | ||
d74534c2 | 333 | static enum power_supply_property bq27541_battery_props[] = { |
f46bf82e AB |
334 | POWER_SUPPLY_PROP_STATUS, |
335 | POWER_SUPPLY_PROP_PRESENT, | |
336 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
337 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
338 | POWER_SUPPLY_PROP_CAPACITY, | |
339 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
340 | POWER_SUPPLY_PROP_TEMP, | |
341 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
342 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
343 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
344 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
345 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
346 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
347 | POWER_SUPPLY_PROP_POWER_AVG, | |
348 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 349 | POWER_SUPPLY_PROP_MANUFACTURER, |
f46bf82e AB |
350 | }; |
351 | ||
d74534c2 AD |
352 | static enum power_supply_property bq27545_battery_props[] = { |
353 | POWER_SUPPLY_PROP_STATUS, | |
354 | POWER_SUPPLY_PROP_PRESENT, | |
355 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
356 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
357 | POWER_SUPPLY_PROP_CAPACITY, | |
358 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
359 | POWER_SUPPLY_PROP_TEMP, | |
360 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
361 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
362 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
363 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
364 | POWER_SUPPLY_PROP_HEALTH, | |
365 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
366 | POWER_SUPPLY_PROP_POWER_AVG, | |
367 | POWER_SUPPLY_PROP_MANUFACTURER, | |
368 | }; | |
369 | ||
370 | static enum power_supply_property bq27421_battery_props[] = { | |
371 | POWER_SUPPLY_PROP_STATUS, | |
372 | POWER_SUPPLY_PROP_PRESENT, | |
373 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
374 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
375 | POWER_SUPPLY_PROP_CAPACITY, | |
376 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
377 | POWER_SUPPLY_PROP_TEMP, | |
378 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
379 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
380 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
381 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
382 | POWER_SUPPLY_PROP_MANUFACTURER, | |
383 | }; | |
384 | ||
385 | #define BQ27XXX_PROP(_id, _prop) \ | |
386 | [_id] = { \ | |
387 | .props = _prop, \ | |
388 | .size = ARRAY_SIZE(_prop), \ | |
389 | } | |
390 | ||
391 | static struct { | |
392 | enum power_supply_property *props; | |
393 | size_t size; | |
394 | } bq27xxx_battery_props[] = { | |
395 | BQ27XXX_PROP(BQ27000, bq27000_battery_props), | |
396 | BQ27XXX_PROP(BQ27010, bq27010_battery_props), | |
397 | BQ27XXX_PROP(BQ27500, bq27500_battery_props), | |
398 | BQ27XXX_PROP(BQ27530, bq27530_battery_props), | |
399 | BQ27XXX_PROP(BQ27541, bq27541_battery_props), | |
400 | BQ27XXX_PROP(BQ27545, bq27545_battery_props), | |
401 | BQ27XXX_PROP(BQ27421, bq27421_battery_props), | |
402 | }; | |
403 | ||
740b755a LPC |
404 | static unsigned int poll_interval = 360; |
405 | module_param(poll_interval, uint, 0644); | |
6d0a1815 AD |
406 | MODULE_PARM_DESC(poll_interval, |
407 | "battery poll interval in seconds - 0 disables polling"); | |
740b755a | 408 | |
b996ad0e | 409 | /* |
081bab21 | 410 | * Common code for BQ27xxx devices |
b996ad0e RG |
411 | */ |
412 | ||
d74534c2 | 413 | static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, |
ce33edfa | 414 | bool single) |
b996ad0e | 415 | { |
d74534c2 AD |
416 | /* Reports EINVAL for invalid/missing registers */ |
417 | if (!di || di->regs[reg_index] == INVALID_REG_ADDR) | |
418 | return -EINVAL; | |
b996ad0e | 419 | |
d74534c2 | 420 | return di->bus.read(di, di->regs[reg_index], single); |
a66f59ba SG |
421 | } |
422 | ||
b996ad0e | 423 | /* |
c5709032 | 424 | * Return the battery State-of-Charge |
b996ad0e RG |
425 | * Or < 0 if something fails. |
426 | */ | |
c5709032 | 427 | static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) |
b996ad0e | 428 | { |
c5709032 | 429 | int soc; |
b996ad0e | 430 | |
549d7b31 NS |
431 | if (di->chip == BQ27000 || di->chip == BQ27010) |
432 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true); | |
433 | else | |
434 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); | |
297a533b | 435 | |
c5709032 AD |
436 | if (soc < 0) |
437 | dev_dbg(di->dev, "error reading State-of-Charge\n"); | |
297a533b | 438 | |
c5709032 | 439 | return soc; |
b996ad0e RG |
440 | } |
441 | ||
631c17ee PR |
442 | /* |
443 | * Return a battery charge value in µAh | |
444 | * Or < 0 if something fails. | |
445 | */ | |
081bab21 | 446 | static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) |
631c17ee PR |
447 | { |
448 | int charge; | |
449 | ||
081bab21 | 450 | charge = bq27xxx_read(di, reg, false); |
631c17ee | 451 | if (charge < 0) { |
c6cd4f26 PR |
452 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
453 | reg, charge); | |
631c17ee PR |
454 | return charge; |
455 | } | |
456 | ||
d74534c2 AD |
457 | if (di->chip == BQ27000 || di->chip == BQ27010) |
458 | charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 459 | else |
d74534c2 | 460 | charge *= 1000; |
631c17ee PR |
461 | |
462 | return charge; | |
463 | } | |
464 | ||
465 | /* | |
c5709032 | 466 | * Return the battery Nominal available capacity in µAh |
631c17ee PR |
467 | * Or < 0 if something fails. |
468 | */ | |
081bab21 | 469 | static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) |
631c17ee | 470 | { |
e59ec4a1 | 471 | int flags; |
e59ec4a1 | 472 | |
d74534c2 AD |
473 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
474 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); | |
475 | if (flags >= 0 && (flags & BQ27000_FLAG_CI)) | |
476 | return -ENODATA; | |
477 | } | |
e59ec4a1 | 478 | |
d74534c2 | 479 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); |
631c17ee PR |
480 | } |
481 | ||
482 | /* | |
d74534c2 | 483 | * Return the battery Full Charge Capacity in µAh |
631c17ee PR |
484 | * Or < 0 if something fails. |
485 | */ | |
d74534c2 | 486 | static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) |
631c17ee | 487 | { |
d74534c2 | 488 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); |
631c17ee PR |
489 | } |
490 | ||
491 | /* | |
d74534c2 | 492 | * Return the Design Capacity in µAh |
631c17ee PR |
493 | * Or < 0 if something fails. |
494 | */ | |
d74534c2 | 495 | static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) |
631c17ee | 496 | { |
d74534c2 | 497 | int dcap; |
631c17ee | 498 | |
549d7b31 NS |
499 | if (di->chip == BQ27000 || di->chip == BQ27010) |
500 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true); | |
501 | else | |
502 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); | |
631c17ee | 503 | |
d74534c2 | 504 | if (dcap < 0) { |
c6cd4f26 | 505 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
d74534c2 | 506 | return dcap; |
631c17ee PR |
507 | } |
508 | ||
d74534c2 | 509 | if (di->chip == BQ27000 || di->chip == BQ27010) |
549d7b31 | 510 | dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
631c17ee | 511 | else |
d74534c2 | 512 | dcap *= 1000; |
631c17ee | 513 | |
d74534c2 | 514 | return dcap; |
631c17ee PR |
515 | } |
516 | ||
a8f6bd23 PR |
517 | /* |
518 | * Return the battery Available energy in µWh | |
519 | * Or < 0 if something fails. | |
520 | */ | |
081bab21 | 521 | static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) |
a8f6bd23 PR |
522 | { |
523 | int ae; | |
524 | ||
d74534c2 | 525 | ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); |
a8f6bd23 | 526 | if (ae < 0) { |
c6cd4f26 | 527 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
528 | return ae; |
529 | } | |
530 | ||
d74534c2 AD |
531 | if (di->chip == BQ27000 || di->chip == BQ27010) |
532 | ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; | |
a8f6bd23 | 533 | else |
d74534c2 | 534 | ae *= 1000; |
a8f6bd23 PR |
535 | |
536 | return ae; | |
537 | } | |
538 | ||
d149e98e | 539 | /* |
5dc3443e | 540 | * Return the battery temperature in tenths of degree Kelvin |
d149e98e PR |
541 | * Or < 0 if something fails. |
542 | */ | |
081bab21 | 543 | static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) |
d149e98e PR |
544 | { |
545 | int temp; | |
546 | ||
d74534c2 | 547 | temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); |
d149e98e PR |
548 | if (temp < 0) { |
549 | dev_err(di->dev, "error reading temperature\n"); | |
550 | return temp; | |
551 | } | |
552 | ||
d74534c2 | 553 | if (di->chip == BQ27000 || di->chip == BQ27010) |
5dc3443e | 554 | temp = 5 * temp / 2; |
d149e98e PR |
555 | |
556 | return temp; | |
557 | } | |
558 | ||
631c17ee PR |
559 | /* |
560 | * Return the battery Cycle count total | |
561 | * Or < 0 if something fails. | |
562 | */ | |
081bab21 | 563 | static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) |
631c17ee PR |
564 | { |
565 | int cyct; | |
566 | ||
d74534c2 | 567 | cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); |
631c17ee PR |
568 | if (cyct < 0) |
569 | dev_err(di->dev, "error reading cycle count total\n"); | |
570 | ||
571 | return cyct; | |
572 | } | |
573 | ||
b996ad0e | 574 | /* |
297a533b LPC |
575 | * Read a time register. |
576 | * Return < 0 if something fails. | |
b996ad0e | 577 | */ |
081bab21 | 578 | static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) |
b996ad0e | 579 | { |
297a533b | 580 | int tval; |
b996ad0e | 581 | |
081bab21 | 582 | tval = bq27xxx_read(di, reg, false); |
297a533b | 583 | if (tval < 0) { |
c6cd4f26 PR |
584 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
585 | reg, tval); | |
297a533b | 586 | return tval; |
b996ad0e RG |
587 | } |
588 | ||
297a533b LPC |
589 | if (tval == 65535) |
590 | return -ENODATA; | |
591 | ||
592 | return tval * 60; | |
593 | } | |
594 | ||
9903e627 | 595 | /* |
c5709032 | 596 | * Read an average power register. |
9903e627 SR |
597 | * Return < 0 if something fails. |
598 | */ | |
d74534c2 | 599 | static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) |
9903e627 SR |
600 | { |
601 | int tval; | |
602 | ||
d74534c2 | 603 | tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
9903e627 | 604 | if (tval < 0) { |
d74534c2 AD |
605 | dev_err(di->dev, "error reading average power register %02x: %d\n", |
606 | BQ27XXX_REG_AP, tval); | |
9903e627 SR |
607 | return tval; |
608 | } | |
609 | ||
d74534c2 AD |
610 | if (di->chip == BQ27000 || di->chip == BQ27010) |
611 | return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; | |
612 | else | |
9903e627 | 613 | return tval; |
d74534c2 AD |
614 | } |
615 | ||
616 | /* | |
617 | * Returns true if a battery over temperature condition is detected | |
618 | */ | |
74aab849 | 619 | static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
d74534c2 | 620 | { |
74aab849 | 621 | if (di->chip == BQ27500 || di->chip == BQ27541 || di->chip == BQ27545) |
d74534c2 | 622 | return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
74aab849 AD |
623 | if (di->chip == BQ27530 || di->chip == BQ27421) |
624 | return flags & BQ27XXX_FLAG_OT; | |
625 | ||
626 | return false; | |
627 | } | |
628 | ||
629 | /* | |
630 | * Returns true if a battery under temperature condition is detected | |
631 | */ | |
632 | static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) | |
633 | { | |
634 | if (di->chip == BQ27530 || di->chip == BQ27421) | |
635 | return flags & BQ27XXX_FLAG_UT; | |
636 | ||
637 | return false; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Returns true if a low state of charge condition is detected | |
642 | */ | |
643 | static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) | |
644 | { | |
645 | if (di->chip == BQ27000 || di->chip == BQ27010) | |
646 | return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); | |
9903e627 | 647 | else |
74aab849 | 648 | return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); |
9903e627 SR |
649 | } |
650 | ||
651 | /* | |
652 | * Read flag register. | |
653 | * Return < 0 if something fails. | |
654 | */ | |
081bab21 | 655 | static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) |
9903e627 | 656 | { |
2edd69a8 | 657 | int flags; |
9903e627 | 658 | |
74aab849 AD |
659 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); |
660 | if (flags < 0) { | |
661 | dev_err(di->dev, "error reading flag register:%d\n", flags); | |
662 | return flags; | |
9903e627 SR |
663 | } |
664 | ||
74aab849 AD |
665 | /* Unlikely but important to return first */ |
666 | if (unlikely(bq27xxx_battery_overtemp(di, flags))) | |
667 | return POWER_SUPPLY_HEALTH_OVERHEAT; | |
668 | if (unlikely(bq27xxx_battery_undertemp(di, flags))) | |
669 | return POWER_SUPPLY_HEALTH_COLD; | |
670 | if (unlikely(bq27xxx_battery_dead(di, flags))) | |
671 | return POWER_SUPPLY_HEALTH_DEAD; | |
9903e627 | 672 | |
74aab849 | 673 | return POWER_SUPPLY_HEALTH_GOOD; |
9903e627 SR |
674 | } |
675 | ||
703df6c0 | 676 | void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
297a533b | 677 | { |
081bab21 | 678 | struct bq27xxx_reg_cache cache = {0, }; |
d74534c2 AD |
679 | bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; |
680 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; | |
297a533b | 681 | |
d74534c2 | 682 | cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
3dd843e1 | 683 | if ((cache.flags & 0xff) == 0xff) |
d74534c2 | 684 | cache.flags = -1; /* read error */ |
297a533b | 685 | if (cache.flags >= 0) { |
d74534c2 AD |
686 | cache.temperature = bq27xxx_battery_read_temperature(di); |
687 | if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { | |
1f94b256 | 688 | dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 689 | cache.capacity = -ENODATA; |
a8f6bd23 | 690 | cache.energy = -ENODATA; |
4b226c2c PR |
691 | cache.time_to_empty = -ENODATA; |
692 | cache.time_to_empty_avg = -ENODATA; | |
693 | cache.time_to_full = -ENODATA; | |
694 | cache.charge_full = -ENODATA; | |
9903e627 | 695 | cache.health = -ENODATA; |
4b226c2c | 696 | } else { |
d74534c2 AD |
697 | if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) |
698 | cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); | |
699 | if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) | |
700 | cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); | |
701 | if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) | |
702 | cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); | |
703 | cache.charge_full = bq27xxx_battery_read_fcc(di); | |
c5709032 | 704 | cache.capacity = bq27xxx_battery_read_soc(di); |
d74534c2 | 705 | if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) |
081bab21 | 706 | cache.energy = bq27xxx_battery_read_energy(di); |
081bab21 | 707 | cache.health = bq27xxx_battery_read_health(di); |
4b226c2c | 708 | } |
d74534c2 | 709 | if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) |
081bab21 | 710 | cache.cycle_count = bq27xxx_battery_read_cyct(di); |
d74534c2 AD |
711 | if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) |
712 | cache.power_avg = bq27xxx_battery_read_pwr_avg(di); | |
297a533b | 713 | |
631c17ee PR |
714 | /* We only have to read charge design full once */ |
715 | if (di->charge_design_full <= 0) | |
d74534c2 | 716 | di->charge_design_full = bq27xxx_battery_read_dcap(di); |
297a533b LPC |
717 | } |
718 | ||
90f04a28 | 719 | if (di->cache.capacity != cache.capacity) |
297d716f | 720 | power_supply_changed(di->bat); |
90f04a28 PV |
721 | |
722 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) | |
723 | di->cache = cache; | |
297a533b LPC |
724 | |
725 | di->last_update = jiffies; | |
726 | } | |
703df6c0 | 727 | EXPORT_SYMBOL_GPL(bq27xxx_battery_update); |
297a533b | 728 | |
081bab21 | 729 | static void bq27xxx_battery_poll(struct work_struct *work) |
740b755a | 730 | { |
081bab21 | 731 | struct bq27xxx_device_info *di = |
d74534c2 AD |
732 | container_of(work, struct bq27xxx_device_info, |
733 | work.work); | |
740b755a | 734 | |
081bab21 | 735 | bq27xxx_battery_update(di); |
740b755a LPC |
736 | |
737 | if (poll_interval > 0) { | |
738 | /* The timer does not have to be accurate. */ | |
739 | set_timer_slack(&di->work.timer, poll_interval * HZ / 4); | |
740 | schedule_delayed_work(&di->work, poll_interval * HZ); | |
741 | } | |
742 | } | |
743 | ||
b996ad0e | 744 | /* |
bf7d4140 | 745 | * Return the battery average current in µA |
b996ad0e RG |
746 | * Note that current can be negative signed as well |
747 | * Or 0 if something fails. | |
748 | */ | |
081bab21 | 749 | static int bq27xxx_battery_current(struct bq27xxx_device_info *di, |
ce33edfa | 750 | union power_supply_propval *val) |
b996ad0e | 751 | { |
297a533b | 752 | int curr; |
b68f6216 | 753 | int flags; |
b996ad0e | 754 | |
d74534c2 | 755 | curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); |
c6cd4f26 PR |
756 | if (curr < 0) { |
757 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 758 | return curr; |
c6cd4f26 | 759 | } |
e20908d9 | 760 | |
d74534c2 AD |
761 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
762 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); | |
b68f6216 | 763 | if (flags & BQ27000_FLAG_CHGS) { |
e20908d9 | 764 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 765 | curr = -curr; |
e20908d9 | 766 | } |
b996ad0e | 767 | |
d74534c2 AD |
768 | val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
769 | } else { | |
770 | /* Other gauges return signed value */ | |
771 | val->intval = (int)((s16)curr) * 1000; | |
b996ad0e RG |
772 | } |
773 | ||
297a533b | 774 | return 0; |
b996ad0e RG |
775 | } |
776 | ||
081bab21 | 777 | static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
ce33edfa | 778 | union power_supply_propval *val) |
4e924a81 | 779 | { |
4e924a81 | 780 | int status; |
4e924a81 | 781 | |
d74534c2 | 782 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
c1b9ab67 LPC |
783 | if (di->cache.flags & BQ27000_FLAG_FC) |
784 | status = POWER_SUPPLY_STATUS_FULL; | |
785 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 786 | status = POWER_SUPPLY_STATUS_CHARGING; |
297d716f | 787 | else if (power_supply_am_i_supplied(di->bat)) |
c1b9ab67 | 788 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
4e924a81 GI |
789 | else |
790 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
d74534c2 AD |
791 | } else { |
792 | if (di->cache.flags & BQ27XXX_FLAG_FC) | |
793 | status = POWER_SUPPLY_STATUS_FULL; | |
794 | else if (di->cache.flags & BQ27XXX_FLAG_DSC) | |
795 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
796 | else | |
797 | status = POWER_SUPPLY_STATUS_CHARGING; | |
4e924a81 GI |
798 | } |
799 | ||
800 | val->intval = status; | |
297a533b | 801 | |
4e924a81 GI |
802 | return 0; |
803 | } | |
804 | ||
081bab21 | 805 | static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, |
ce33edfa | 806 | union power_supply_propval *val) |
d66bab3f PR |
807 | { |
808 | int level; | |
809 | ||
d74534c2 AD |
810 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
811 | if (di->cache.flags & BQ27000_FLAG_FC) | |
d66bab3f | 812 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 813 | else if (di->cache.flags & BQ27000_FLAG_EDV1) |
d66bab3f | 814 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 815 | else if (di->cache.flags & BQ27000_FLAG_EDVF) |
d66bab3f PR |
816 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
817 | else | |
818 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
819 | } else { | |
d74534c2 | 820 | if (di->cache.flags & BQ27XXX_FLAG_FC) |
d66bab3f | 821 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 822 | else if (di->cache.flags & BQ27XXX_FLAG_SOC1) |
d66bab3f | 823 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 824 | else if (di->cache.flags & BQ27XXX_FLAG_SOCF) |
d66bab3f PR |
825 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
826 | else | |
827 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
828 | } | |
829 | ||
830 | val->intval = level; | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
4e924a81 | 835 | /* |
91fe4d50 | 836 | * Return the battery Voltage in millivolts |
297a533b | 837 | * Or < 0 if something fails. |
4e924a81 | 838 | */ |
081bab21 | 839 | static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, |
ce33edfa | 840 | union power_supply_propval *val) |
4e924a81 | 841 | { |
297a533b | 842 | int volt; |
4e924a81 | 843 | |
d74534c2 | 844 | volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); |
c6cd4f26 PR |
845 | if (volt < 0) { |
846 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 847 | return volt; |
c6cd4f26 | 848 | } |
4e924a81 | 849 | |
297a533b LPC |
850 | val->intval = volt * 1000; |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
081bab21 | 855 | static int bq27xxx_simple_value(int value, |
ce33edfa | 856 | union power_supply_propval *val) |
297a533b LPC |
857 | { |
858 | if (value < 0) | |
859 | return value; | |
860 | ||
861 | val->intval = value; | |
4e924a81 | 862 | |
4e924a81 GI |
863 | return 0; |
864 | } | |
865 | ||
081bab21 | 866 | static int bq27xxx_battery_get_property(struct power_supply *psy, |
b996ad0e RG |
867 | enum power_supply_property psp, |
868 | union power_supply_propval *val) | |
869 | { | |
4e924a81 | 870 | int ret = 0; |
081bab21 | 871 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
3413b4ea | 872 | |
740b755a LPC |
873 | mutex_lock(&di->lock); |
874 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
875 | cancel_delayed_work_sync(&di->work); | |
081bab21 | 876 | bq27xxx_battery_poll(&di->work.work); |
740b755a LPC |
877 | } |
878 | mutex_unlock(&di->lock); | |
297a533b LPC |
879 | |
880 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 881 | return -ENODEV; |
b996ad0e RG |
882 | |
883 | switch (psp) { | |
4e924a81 | 884 | case POWER_SUPPLY_PROP_STATUS: |
081bab21 | 885 | ret = bq27xxx_battery_status(di, val); |
4e924a81 | 886 | break; |
b996ad0e | 887 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
081bab21 | 888 | ret = bq27xxx_battery_voltage(di, val); |
3413b4ea | 889 | break; |
b996ad0e | 890 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 891 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
892 | break; |
893 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
081bab21 | 894 | ret = bq27xxx_battery_current(di, val); |
b996ad0e RG |
895 | break; |
896 | case POWER_SUPPLY_PROP_CAPACITY: | |
081bab21 | 897 | ret = bq27xxx_simple_value(di->cache.capacity, val); |
b996ad0e | 898 | break; |
d66bab3f | 899 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
081bab21 | 900 | ret = bq27xxx_battery_capacity_level(di, val); |
d66bab3f | 901 | break; |
b996ad0e | 902 | case POWER_SUPPLY_PROP_TEMP: |
081bab21 | 903 | ret = bq27xxx_simple_value(di->cache.temperature, val); |
5dc3443e | 904 | if (ret == 0) |
d74534c2 | 905 | val->intval -= 2731; /* convert decidegree k to c */ |
b996ad0e | 906 | break; |
4e924a81 | 907 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
081bab21 | 908 | ret = bq27xxx_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
909 | break; |
910 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
081bab21 | 911 | ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
912 | break; |
913 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
081bab21 | 914 | ret = bq27xxx_simple_value(di->cache.time_to_full, val); |
4e924a81 | 915 | break; |
5661f334 LPC |
916 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
917 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
918 | break; | |
631c17ee | 919 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
081bab21 | 920 | ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val); |
631c17ee PR |
921 | break; |
922 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
081bab21 | 923 | ret = bq27xxx_simple_value(di->cache.charge_full, val); |
631c17ee PR |
924 | break; |
925 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
081bab21 | 926 | ret = bq27xxx_simple_value(di->charge_design_full, val); |
631c17ee | 927 | break; |
73c244a8 | 928 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
081bab21 | 929 | ret = bq27xxx_simple_value(di->cache.cycle_count, val); |
631c17ee PR |
930 | break; |
931 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
081bab21 | 932 | ret = bq27xxx_simple_value(di->cache.energy, val); |
631c17ee | 933 | break; |
9903e627 | 934 | case POWER_SUPPLY_PROP_POWER_AVG: |
081bab21 | 935 | ret = bq27xxx_simple_value(di->cache.power_avg, val); |
9903e627 SR |
936 | break; |
937 | case POWER_SUPPLY_PROP_HEALTH: | |
081bab21 | 938 | ret = bq27xxx_simple_value(di->cache.health, val); |
9903e627 | 939 | break; |
db04fc5c AD |
940 | case POWER_SUPPLY_PROP_MANUFACTURER: |
941 | val->strval = BQ27XXX_MANUFACTURER; | |
942 | break; | |
b996ad0e RG |
943 | default: |
944 | return -EINVAL; | |
945 | } | |
946 | ||
4e924a81 | 947 | return ret; |
b996ad0e RG |
948 | } |
949 | ||
081bab21 | 950 | static void bq27xxx_external_power_changed(struct power_supply *psy) |
740b755a | 951 | { |
081bab21 | 952 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
740b755a LPC |
953 | |
954 | cancel_delayed_work_sync(&di->work); | |
955 | schedule_delayed_work(&di->work, 0); | |
956 | } | |
957 | ||
703df6c0 | 958 | int bq27xxx_battery_setup(struct bq27xxx_device_info *di) |
b996ad0e | 959 | { |
297d716f KK |
960 | struct power_supply_desc *psy_desc; |
961 | struct power_supply_config psy_cfg = { .drv_data = di, }; | |
962 | ||
703df6c0 AD |
963 | INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll); |
964 | mutex_init(&di->lock); | |
965 | di->regs = bq27xxx_regs[di->chip]; | |
966 | ||
297d716f KK |
967 | psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL); |
968 | if (!psy_desc) | |
969 | return -ENOMEM; | |
a40402ef | 970 | |
703df6c0 | 971 | psy_desc->name = di->name; |
297d716f | 972 | psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; |
d74534c2 AD |
973 | psy_desc->properties = bq27xxx_battery_props[di->chip].props; |
974 | psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; | |
081bab21 AD |
975 | psy_desc->get_property = bq27xxx_battery_get_property; |
976 | psy_desc->external_power_changed = bq27xxx_external_power_changed; | |
740b755a | 977 | |
297d716f KK |
978 | di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg); |
979 | if (IS_ERR(di->bat)) { | |
703df6c0 AD |
980 | dev_err(di->dev, "failed to register battery\n"); |
981 | return PTR_ERR(di->bat); | |
a40402ef LPC |
982 | } |
983 | ||
984 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
985 | ||
081bab21 | 986 | bq27xxx_battery_update(di); |
297a533b | 987 | |
a40402ef | 988 | return 0; |
b996ad0e | 989 | } |
703df6c0 | 990 | EXPORT_SYMBOL_GPL(bq27xxx_battery_setup); |
b996ad0e | 991 | |
703df6c0 | 992 | void bq27xxx_battery_teardown(struct bq27xxx_device_info *di) |
740b755a | 993 | { |
8cfaaa81 | 994 | /* |
081bab21 AD |
995 | * power_supply_unregister call bq27xxx_battery_get_property which |
996 | * call bq27xxx_battery_poll. | |
997 | * Make sure that bq27xxx_battery_poll will not call | |
8cfaaa81 PR |
998 | * schedule_delayed_work again after unregister (which cause OOPS). |
999 | */ | |
1000 | poll_interval = 0; | |
1001 | ||
740b755a LPC |
1002 | cancel_delayed_work_sync(&di->work); |
1003 | ||
297d716f | 1004 | power_supply_unregister(di->bat); |
740b755a LPC |
1005 | |
1006 | mutex_destroy(&di->lock); | |
1007 | } | |
703df6c0 | 1008 | EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown); |
7fb7ba58 | 1009 | |
081bab21 AD |
1010 | static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg, |
1011 | bool single) | |
7fb7ba58 LPC |
1012 | { |
1013 | struct device *dev = di->dev; | |
081bab21 | 1014 | struct bq27xxx_platform_data *pdata = dev->platform_data; |
7fb7ba58 LPC |
1015 | unsigned int timeout = 3; |
1016 | int upper, lower; | |
1017 | int temp; | |
1018 | ||
1019 | if (!single) { | |
1020 | /* Make sure the value has not changed in between reading the | |
1021 | * lower and the upper part */ | |
1022 | upper = pdata->read(dev, reg + 1); | |
1023 | do { | |
1024 | temp = upper; | |
1025 | if (upper < 0) | |
1026 | return upper; | |
1027 | ||
1028 | lower = pdata->read(dev, reg); | |
1029 | if (lower < 0) | |
1030 | return lower; | |
1031 | ||
1032 | upper = pdata->read(dev, reg + 1); | |
1033 | } while (temp != upper && --timeout); | |
1034 | ||
1035 | if (timeout == 0) | |
1036 | return -EIO; | |
1037 | ||
297a533b | 1038 | return (upper << 8) | lower; |
7fb7ba58 | 1039 | } |
297a533b LPC |
1040 | |
1041 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
1042 | } |
1043 | ||
081bab21 | 1044 | static int bq27xxx_battery_platform_probe(struct platform_device *pdev) |
7fb7ba58 | 1045 | { |
081bab21 AD |
1046 | struct bq27xxx_device_info *di; |
1047 | struct bq27xxx_platform_data *pdata = pdev->dev.platform_data; | |
7fb7ba58 LPC |
1048 | |
1049 | if (!pdata) { | |
1050 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | if (!pdata->read) { | |
1055 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
1056 | return -EINVAL; | |
1057 | } | |
1058 | ||
424cfde4 AD |
1059 | if (!pdata->chip) { |
1060 | dev_err(&pdev->dev, "no device supplied\n"); | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
1cb82fdb | 1064 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
6d0a1815 | 1065 | if (!di) |
7fb7ba58 | 1066 | return -ENOMEM; |
7fb7ba58 LPC |
1067 | |
1068 | platform_set_drvdata(pdev, di); | |
1069 | ||
1070 | di->dev = &pdev->dev; | |
424cfde4 | 1071 | di->chip = pdata->chip; |
703df6c0 AD |
1072 | di->name = pdata->name ?: dev_name(&pdev->dev); |
1073 | di->bus.read = bq27xxx_battery_platform_read; | |
7fb7ba58 | 1074 | |
703df6c0 | 1075 | return bq27xxx_battery_setup(di); |
7fb7ba58 LPC |
1076 | } |
1077 | ||
081bab21 | 1078 | static int bq27xxx_battery_platform_remove(struct platform_device *pdev) |
7fb7ba58 | 1079 | { |
081bab21 | 1080 | struct bq27xxx_device_info *di = platform_get_drvdata(pdev); |
7fb7ba58 | 1081 | |
703df6c0 | 1082 | bq27xxx_battery_teardown(di); |
740b755a | 1083 | |
7fb7ba58 LPC |
1084 | return 0; |
1085 | } | |
1086 | ||
703df6c0 AD |
1087 | static const struct platform_device_id bq27xxx_battery_platform_id_table[] = { |
1088 | { "bq27000-battery", }, | |
1089 | { /* sentinel */ } | |
1090 | }; | |
1091 | MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table); | |
1092 | ||
081bab21 AD |
1093 | static struct platform_driver bq27xxx_battery_platform_driver = { |
1094 | .probe = bq27xxx_battery_platform_probe, | |
1095 | .remove = bq27xxx_battery_platform_remove, | |
7fb7ba58 LPC |
1096 | .driver = { |
1097 | .name = "bq27000-battery", | |
7fb7ba58 | 1098 | }, |
703df6c0 | 1099 | .id_table = bq27xxx_battery_platform_id_table, |
7fb7ba58 | 1100 | }; |
703df6c0 | 1101 | module_platform_driver(bq27xxx_battery_platform_driver); |
8ebb7e9c | 1102 | |
b996ad0e | 1103 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
081bab21 | 1104 | MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
b996ad0e | 1105 | MODULE_LICENSE("GPL"); |