2 * BQ27xxx battery driver
4 * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
5 * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
6 * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
7 * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
9 * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
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.
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.
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-g1
26 * http://www.ti.com/product/bq27510-g2
27 * http://www.ti.com/product/bq27510-g3
28 * http://www.ti.com/product/bq27520-g4
29 * http://www.ti.com/product/bq27520-g1
30 * http://www.ti.com/product/bq27520-g2
31 * http://www.ti.com/product/bq27520-g3
32 * http://www.ti.com/product/bq27520-g4
33 * http://www.ti.com/product/bq27530-g1
34 * http://www.ti.com/product/bq27531-g1
35 * http://www.ti.com/product/bq27541-g1
36 * http://www.ti.com/product/bq27542-g1
37 * http://www.ti.com/product/bq27546-g1
38 * http://www.ti.com/product/bq27742-g1
39 * http://www.ti.com/product/bq27545-g1
40 * http://www.ti.com/product/bq27421-g1
41 * http://www.ti.com/product/bq27425-g1
42 * http://www.ti.com/product/bq27411-g1
43 * http://www.ti.com/product/bq27621-g1
46 #include <linux/device.h>
47 #include <linux/module.h>
48 #include <linux/mutex.h>
49 #include <linux/param.h>
50 #include <linux/jiffies.h>
51 #include <linux/workqueue.h>
52 #include <linux/delay.h>
53 #include <linux/platform_device.h>
54 #include <linux/power_supply.h>
55 #include <linux/slab.h>
58 #include <linux/power/bq27xxx_battery.h>
60 #define DRIVER_VERSION "1.2.0"
62 #define BQ27XXX_MANUFACTURER "Texas Instruments"
65 #define BQ27XXX_FLAG_DSC BIT(0)
66 #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
67 #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
68 #define BQ27XXX_FLAG_FC BIT(9)
69 #define BQ27XXX_FLAG_OTD BIT(14)
70 #define BQ27XXX_FLAG_OTC BIT(15)
71 #define BQ27XXX_FLAG_UT BIT(14)
72 #define BQ27XXX_FLAG_OT BIT(15)
74 /* BQ27000 has different layout for Flags register */
75 #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
76 #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
77 #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
78 #define BQ27000_FLAG_FC BIT(5)
79 #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
81 #define BQ27XXX_RS (20) /* Resistor sense mOhm */
82 #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
83 #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
85 #define INVALID_REG_ADDR 0xff
88 * bq27xxx_reg_index - Register names
90 * These are indexes into a device's register mapping array.
93 enum bq27xxx_reg_index {
94 BQ27XXX_REG_CTRL = 0, /* Control */
95 BQ27XXX_REG_TEMP, /* Temperature */
96 BQ27XXX_REG_INT_TEMP, /* Internal Temperature */
97 BQ27XXX_REG_VOLT, /* Voltage */
98 BQ27XXX_REG_AI, /* Average Current */
99 BQ27XXX_REG_FLAGS, /* Flags */
100 BQ27XXX_REG_TTE, /* Time-to-Empty */
101 BQ27XXX_REG_TTF, /* Time-to-Full */
102 BQ27XXX_REG_TTES, /* Time-to-Empty Standby */
103 BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */
104 BQ27XXX_REG_NAC, /* Nominal Available Capacity */
105 BQ27XXX_REG_FCC, /* Full Charge Capacity */
106 BQ27XXX_REG_CYCT, /* Cycle Count */
107 BQ27XXX_REG_AE, /* Available Energy */
108 BQ27XXX_REG_SOC, /* State-of-Charge */
109 BQ27XXX_REG_DCAP, /* Design Capacity */
110 BQ27XXX_REG_AP, /* Average Power */
111 BQ27XXX_REG_MAX, /* sentinel */
114 /* Register mappings */
115 static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = {
117 [BQ27XXX_REG_CTRL] = 0x00,
118 [BQ27XXX_REG_TEMP] = 0x06,
119 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
120 [BQ27XXX_REG_VOLT] = 0x08,
121 [BQ27XXX_REG_AI] = 0x14,
122 [BQ27XXX_REG_FLAGS] = 0x0a,
123 [BQ27XXX_REG_TTE] = 0x16,
124 [BQ27XXX_REG_TTF] = 0x18,
125 [BQ27XXX_REG_TTES] = 0x1c,
126 [BQ27XXX_REG_TTECP] = 0x26,
127 [BQ27XXX_REG_NAC] = 0x0c,
128 [BQ27XXX_REG_FCC] = 0x12,
129 [BQ27XXX_REG_CYCT] = 0x2a,
130 [BQ27XXX_REG_AE] = 0x22,
131 [BQ27XXX_REG_SOC] = 0x0b,
132 [BQ27XXX_REG_DCAP] = 0x76,
133 [BQ27XXX_REG_AP] = 0x24,
136 [BQ27XXX_REG_CTRL] = 0x00,
137 [BQ27XXX_REG_TEMP] = 0x06,
138 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
139 [BQ27XXX_REG_VOLT] = 0x08,
140 [BQ27XXX_REG_AI] = 0x14,
141 [BQ27XXX_REG_FLAGS] = 0x0a,
142 [BQ27XXX_REG_TTE] = 0x16,
143 [BQ27XXX_REG_TTF] = 0x18,
144 [BQ27XXX_REG_TTES] = 0x1c,
145 [BQ27XXX_REG_TTECP] = 0x26,
146 [BQ27XXX_REG_NAC] = 0x0c,
147 [BQ27XXX_REG_FCC] = 0x12,
148 [BQ27XXX_REG_CYCT] = 0x2a,
149 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
150 [BQ27XXX_REG_SOC] = 0x0b,
151 [BQ27XXX_REG_DCAP] = 0x76,
152 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
155 [BQ27XXX_REG_CTRL] = 0x00,
156 [BQ27XXX_REG_TEMP] = 0x06,
157 [BQ27XXX_REG_INT_TEMP] = 0x28,
158 [BQ27XXX_REG_VOLT] = 0x08,
159 [BQ27XXX_REG_AI] = 0x14,
160 [BQ27XXX_REG_FLAGS] = 0x0a,
161 [BQ27XXX_REG_TTE] = 0x16,
162 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
163 [BQ27XXX_REG_TTES] = 0x1a,
164 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
165 [BQ27XXX_REG_NAC] = 0x0c,
166 [BQ27XXX_REG_FCC] = 0x12,
167 [BQ27XXX_REG_CYCT] = 0x2a,
168 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
169 [BQ27XXX_REG_SOC] = 0x2c,
170 [BQ27XXX_REG_DCAP] = 0x3c,
171 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
174 [BQ27XXX_REG_CTRL] = 0x00,
175 [BQ27XXX_REG_TEMP] = 0x06,
176 [BQ27XXX_REG_INT_TEMP] = 0x28,
177 [BQ27XXX_REG_VOLT] = 0x08,
178 [BQ27XXX_REG_AI] = 0x14,
179 [BQ27XXX_REG_FLAGS] = 0x0a,
180 [BQ27XXX_REG_TTE] = 0x16,
181 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
182 [BQ27XXX_REG_TTES] = 0x1a,
183 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
184 [BQ27XXX_REG_NAC] = 0x0c,
185 [BQ27XXX_REG_FCC] = 0x12,
186 [BQ27XXX_REG_CYCT] = 0x1e,
187 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
188 [BQ27XXX_REG_SOC] = 0x20,
189 [BQ27XXX_REG_DCAP] = 0x2e,
190 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
193 [BQ27XXX_REG_CTRL] = 0x00,
194 [BQ27XXX_REG_TEMP] = 0x06,
195 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
196 [BQ27XXX_REG_VOLT] = 0x08,
197 [BQ27XXX_REG_AI] = 0x14,
198 [BQ27XXX_REG_FLAGS] = 0x0a,
199 [BQ27XXX_REG_TTE] = 0x16,
200 [BQ27XXX_REG_TTF] = 0x18,
201 [BQ27XXX_REG_TTES] = 0x1c,
202 [BQ27XXX_REG_TTECP] = 0x26,
203 [BQ27XXX_REG_NAC] = 0x0c,
204 [BQ27XXX_REG_FCC] = 0x12,
205 [BQ27XXX_REG_CYCT] = 0x2a,
206 [BQ27XXX_REG_AE] = 0x22,
207 [BQ27XXX_REG_SOC] = 0x2c,
208 [BQ27XXX_REG_DCAP] = 0x3c,
209 [BQ27XXX_REG_AP] = 0x24,
212 [BQ27XXX_REG_CTRL] = 0x00,
213 [BQ27XXX_REG_TEMP] = 0x06,
214 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
215 [BQ27XXX_REG_VOLT] = 0x08,
216 [BQ27XXX_REG_AI] = 0x14,
217 [BQ27XXX_REG_FLAGS] = 0x0a,
218 [BQ27XXX_REG_TTE] = 0x16,
219 [BQ27XXX_REG_TTF] = 0x18,
220 [BQ27XXX_REG_TTES] = 0x1c,
221 [BQ27XXX_REG_TTECP] = 0x26,
222 [BQ27XXX_REG_NAC] = 0x0c,
223 [BQ27XXX_REG_FCC] = 0x12,
224 [BQ27XXX_REG_CYCT] = 0x2a,
225 [BQ27XXX_REG_AE] = 0x22,
226 [BQ27XXX_REG_SOC] = 0x2c,
227 [BQ27XXX_REG_DCAP] = 0x3c,
228 [BQ27XXX_REG_AP] = 0x24,
231 [BQ27XXX_REG_CTRL] = 0x00,
232 [BQ27XXX_REG_TEMP] = 0x06,
233 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
234 [BQ27XXX_REG_VOLT] = 0x08,
235 [BQ27XXX_REG_AI] = 0x14,
236 [BQ27XXX_REG_FLAGS] = 0x0a,
237 [BQ27XXX_REG_TTE] = 0x16,
238 [BQ27XXX_REG_TTF] = 0x18,
239 [BQ27XXX_REG_TTES] = 0x1c,
240 [BQ27XXX_REG_TTECP] = 0x26,
241 [BQ27XXX_REG_NAC] = 0x0c,
242 [BQ27XXX_REG_FCC] = 0x12,
243 [BQ27XXX_REG_CYCT] = 0x2a,
244 [BQ27XXX_REG_AE] = 0x22,
245 [BQ27XXX_REG_SOC] = 0x2c,
246 [BQ27XXX_REG_DCAP] = 0x3c,
247 [BQ27XXX_REG_AP] = 0x24,
250 [BQ27XXX_REG_CTRL] = 0x00,
251 [BQ27XXX_REG_TEMP] = 0x06,
252 [BQ27XXX_REG_INT_TEMP] = 0x28,
253 [BQ27XXX_REG_VOLT] = 0x08,
254 [BQ27XXX_REG_AI] = 0x14,
255 [BQ27XXX_REG_FLAGS] = 0x0a,
256 [BQ27XXX_REG_TTE] = 0x16,
257 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
258 [BQ27XXX_REG_TTES] = 0x1a,
259 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
260 [BQ27XXX_REG_NAC] = 0x0c,
261 [BQ27XXX_REG_FCC] = 0x12,
262 [BQ27XXX_REG_CYCT] = 0x1e,
263 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
264 [BQ27XXX_REG_SOC] = 0x20,
265 [BQ27XXX_REG_DCAP] = 0x2e,
266 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
269 [BQ27XXX_REG_CTRL] = 0x00,
270 [BQ27XXX_REG_TEMP] = 0x06,
271 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
272 [BQ27XXX_REG_VOLT] = 0x08,
273 [BQ27XXX_REG_AI] = 0x14,
274 [BQ27XXX_REG_FLAGS] = 0x0a,
275 [BQ27XXX_REG_TTE] = 0x16,
276 [BQ27XXX_REG_TTF] = 0x18,
277 [BQ27XXX_REG_TTES] = 0x1c,
278 [BQ27XXX_REG_TTECP] = 0x26,
279 [BQ27XXX_REG_NAC] = 0x0c,
280 [BQ27XXX_REG_FCC] = 0x12,
281 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
282 [BQ27XXX_REG_AE] = 0x22,
283 [BQ27XXX_REG_SOC] = 0x2c,
284 [BQ27XXX_REG_DCAP] = 0x3c,
285 [BQ27XXX_REG_AP] = 0x24,
288 [BQ27XXX_REG_CTRL] = 0x00,
289 [BQ27XXX_REG_TEMP] = 0x06,
290 [BQ27XXX_REG_INT_TEMP] = 0x36,
291 [BQ27XXX_REG_VOLT] = 0x08,
292 [BQ27XXX_REG_AI] = 0x14,
293 [BQ27XXX_REG_FLAGS] = 0x0a,
294 [BQ27XXX_REG_TTE] = 0x16,
295 [BQ27XXX_REG_TTF] = 0x18,
296 [BQ27XXX_REG_TTES] = 0x1c,
297 [BQ27XXX_REG_TTECP] = 0x26,
298 [BQ27XXX_REG_NAC] = 0x0c,
299 [BQ27XXX_REG_FCC] = 0x12,
300 [BQ27XXX_REG_CYCT] = 0x2a,
301 [BQ27XXX_REG_AE] = 0x22,
302 [BQ27XXX_REG_SOC] = 0x2c,
303 [BQ27XXX_REG_DCAP] = 0x3c,
304 [BQ27XXX_REG_AP] = 0x24,
307 [BQ27XXX_REG_CTRL] = 0x00,
308 [BQ27XXX_REG_TEMP] = 0x06,
309 [BQ27XXX_REG_INT_TEMP] = 0x36,
310 [BQ27XXX_REG_VOLT] = 0x08,
311 [BQ27XXX_REG_AI] = 0x14,
312 [BQ27XXX_REG_FLAGS] = 0x0a,
313 [BQ27XXX_REG_TTE] = 0x16,
314 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
315 [BQ27XXX_REG_TTES] = 0x1c,
316 [BQ27XXX_REG_TTECP] = 0x26,
317 [BQ27XXX_REG_NAC] = 0x0c,
318 [BQ27XXX_REG_FCC] = 0x12,
319 [BQ27XXX_REG_CYCT] = 0x2a,
320 [BQ27XXX_REG_AE] = 0x22,
321 [BQ27XXX_REG_SOC] = 0x2c,
322 [BQ27XXX_REG_DCAP] = 0x3c,
323 [BQ27XXX_REG_AP] = 0x24,
326 [BQ27XXX_REG_CTRL] = 0x00,
327 [BQ27XXX_REG_TEMP] = 0x06,
328 [BQ27XXX_REG_INT_TEMP] = 0x28,
329 [BQ27XXX_REG_VOLT] = 0x08,
330 [BQ27XXX_REG_AI] = 0x14,
331 [BQ27XXX_REG_FLAGS] = 0x0a,
332 [BQ27XXX_REG_TTE] = 0x16,
333 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
334 [BQ27XXX_REG_TTES] = 0x1c,
335 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
336 [BQ27XXX_REG_NAC] = 0x0c,
337 [BQ27XXX_REG_FCC] = 0x12,
338 [BQ27XXX_REG_CYCT] = 0x1e,
339 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
340 [BQ27XXX_REG_SOC] = 0x20,
341 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
342 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
345 [BQ27XXX_REG_CTRL] = 0x00,
346 [BQ27XXX_REG_TEMP] = 0x06,
347 [BQ27XXX_REG_INT_TEMP] = 0x32,
348 [BQ27XXX_REG_VOLT] = 0x08,
349 [BQ27XXX_REG_AI] = 0x14,
350 [BQ27XXX_REG_FLAGS] = 0x0a,
351 [BQ27XXX_REG_TTE] = 0x16,
352 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
353 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
354 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
355 [BQ27XXX_REG_NAC] = 0x0c,
356 [BQ27XXX_REG_FCC] = 0x12,
357 [BQ27XXX_REG_CYCT] = 0x2a,
358 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
359 [BQ27XXX_REG_SOC] = 0x2c,
360 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
361 [BQ27XXX_REG_AP] = 0x24,
364 [BQ27XXX_REG_CTRL] = 0x00,
365 [BQ27XXX_REG_TEMP] = 0x06,
366 [BQ27XXX_REG_INT_TEMP] = 0x28,
367 [BQ27XXX_REG_VOLT] = 0x08,
368 [BQ27XXX_REG_AI] = 0x14,
369 [BQ27XXX_REG_FLAGS] = 0x0a,
370 [BQ27XXX_REG_TTE] = 0x16,
371 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
372 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
373 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
374 [BQ27XXX_REG_NAC] = 0x0c,
375 [BQ27XXX_REG_FCC] = 0x12,
376 [BQ27XXX_REG_CYCT] = 0x2a,
377 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
378 [BQ27XXX_REG_SOC] = 0x2c,
379 [BQ27XXX_REG_DCAP] = 0x3c,
380 [BQ27XXX_REG_AP] = 0x24,
383 [BQ27XXX_REG_CTRL] = 0x00,
384 [BQ27XXX_REG_TEMP] = 0x06,
385 [BQ27XXX_REG_INT_TEMP] = 0x28,
386 [BQ27XXX_REG_VOLT] = 0x08,
387 [BQ27XXX_REG_AI] = 0x14,
388 [BQ27XXX_REG_FLAGS] = 0x0a,
389 [BQ27XXX_REG_TTE] = 0x16,
390 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
391 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
392 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
393 [BQ27XXX_REG_NAC] = 0x0c,
394 [BQ27XXX_REG_FCC] = 0x12,
395 [BQ27XXX_REG_CYCT] = 0x2a,
396 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
397 [BQ27XXX_REG_SOC] = 0x2c,
398 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
399 [BQ27XXX_REG_AP] = 0x24,
402 [BQ27XXX_REG_CTRL] = 0x00,
403 [BQ27XXX_REG_TEMP] = 0x02,
404 [BQ27XXX_REG_INT_TEMP] = 0x1e,
405 [BQ27XXX_REG_VOLT] = 0x04,
406 [BQ27XXX_REG_AI] = 0x10,
407 [BQ27XXX_REG_FLAGS] = 0x06,
408 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
409 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
410 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
411 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
412 [BQ27XXX_REG_NAC] = 0x08,
413 [BQ27XXX_REG_FCC] = 0x0e,
414 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
415 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
416 [BQ27XXX_REG_SOC] = 0x1c,
417 [BQ27XXX_REG_DCAP] = 0x3c,
418 [BQ27XXX_REG_AP] = 0x18,
422 static enum power_supply_property bq27000_battery_props[] = {
423 POWER_SUPPLY_PROP_STATUS,
424 POWER_SUPPLY_PROP_PRESENT,
425 POWER_SUPPLY_PROP_VOLTAGE_NOW,
426 POWER_SUPPLY_PROP_CURRENT_NOW,
427 POWER_SUPPLY_PROP_CAPACITY,
428 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
429 POWER_SUPPLY_PROP_TEMP,
430 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
431 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
432 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
433 POWER_SUPPLY_PROP_TECHNOLOGY,
434 POWER_SUPPLY_PROP_CHARGE_FULL,
435 POWER_SUPPLY_PROP_CHARGE_NOW,
436 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
437 POWER_SUPPLY_PROP_CYCLE_COUNT,
438 POWER_SUPPLY_PROP_ENERGY_NOW,
439 POWER_SUPPLY_PROP_POWER_AVG,
440 POWER_SUPPLY_PROP_HEALTH,
441 POWER_SUPPLY_PROP_MANUFACTURER,
444 static enum power_supply_property bq27010_battery_props[] = {
445 POWER_SUPPLY_PROP_STATUS,
446 POWER_SUPPLY_PROP_PRESENT,
447 POWER_SUPPLY_PROP_VOLTAGE_NOW,
448 POWER_SUPPLY_PROP_CURRENT_NOW,
449 POWER_SUPPLY_PROP_CAPACITY,
450 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
451 POWER_SUPPLY_PROP_TEMP,
452 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
453 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
454 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
455 POWER_SUPPLY_PROP_TECHNOLOGY,
456 POWER_SUPPLY_PROP_CHARGE_FULL,
457 POWER_SUPPLY_PROP_CHARGE_NOW,
458 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
459 POWER_SUPPLY_PROP_CYCLE_COUNT,
460 POWER_SUPPLY_PROP_HEALTH,
461 POWER_SUPPLY_PROP_MANUFACTURER,
464 static enum power_supply_property bq2750x_battery_props[] = {
465 POWER_SUPPLY_PROP_STATUS,
466 POWER_SUPPLY_PROP_PRESENT,
467 POWER_SUPPLY_PROP_VOLTAGE_NOW,
468 POWER_SUPPLY_PROP_CURRENT_NOW,
469 POWER_SUPPLY_PROP_CAPACITY,
470 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
471 POWER_SUPPLY_PROP_TEMP,
472 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
473 POWER_SUPPLY_PROP_TECHNOLOGY,
474 POWER_SUPPLY_PROP_CHARGE_FULL,
475 POWER_SUPPLY_PROP_CHARGE_NOW,
476 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
477 POWER_SUPPLY_PROP_CYCLE_COUNT,
478 POWER_SUPPLY_PROP_HEALTH,
479 POWER_SUPPLY_PROP_MANUFACTURER,
482 static enum power_supply_property bq2751x_battery_props[] = {
483 POWER_SUPPLY_PROP_STATUS,
484 POWER_SUPPLY_PROP_PRESENT,
485 POWER_SUPPLY_PROP_VOLTAGE_NOW,
486 POWER_SUPPLY_PROP_CURRENT_NOW,
487 POWER_SUPPLY_PROP_CAPACITY,
488 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
489 POWER_SUPPLY_PROP_TEMP,
490 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
491 POWER_SUPPLY_PROP_TECHNOLOGY,
492 POWER_SUPPLY_PROP_CHARGE_FULL,
493 POWER_SUPPLY_PROP_CHARGE_NOW,
494 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
495 POWER_SUPPLY_PROP_CYCLE_COUNT,
496 POWER_SUPPLY_PROP_HEALTH,
497 POWER_SUPPLY_PROP_MANUFACTURER,
500 static enum power_supply_property bq27500_battery_props[] = {
501 POWER_SUPPLY_PROP_STATUS,
502 POWER_SUPPLY_PROP_PRESENT,
503 POWER_SUPPLY_PROP_VOLTAGE_NOW,
504 POWER_SUPPLY_PROP_CURRENT_NOW,
505 POWER_SUPPLY_PROP_CAPACITY,
506 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
507 POWER_SUPPLY_PROP_TEMP,
508 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
509 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
510 POWER_SUPPLY_PROP_TECHNOLOGY,
511 POWER_SUPPLY_PROP_CHARGE_FULL,
512 POWER_SUPPLY_PROP_CHARGE_NOW,
513 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
514 POWER_SUPPLY_PROP_CYCLE_COUNT,
515 POWER_SUPPLY_PROP_ENERGY_NOW,
516 POWER_SUPPLY_PROP_POWER_AVG,
517 POWER_SUPPLY_PROP_HEALTH,
518 POWER_SUPPLY_PROP_MANUFACTURER,
521 static enum power_supply_property bq27510g1_battery_props[] = {
522 POWER_SUPPLY_PROP_STATUS,
523 POWER_SUPPLY_PROP_PRESENT,
524 POWER_SUPPLY_PROP_VOLTAGE_NOW,
525 POWER_SUPPLY_PROP_CURRENT_NOW,
526 POWER_SUPPLY_PROP_CAPACITY,
527 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
528 POWER_SUPPLY_PROP_TEMP,
529 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
530 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
531 POWER_SUPPLY_PROP_TECHNOLOGY,
532 POWER_SUPPLY_PROP_CHARGE_FULL,
533 POWER_SUPPLY_PROP_CHARGE_NOW,
534 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
535 POWER_SUPPLY_PROP_CYCLE_COUNT,
536 POWER_SUPPLY_PROP_ENERGY_NOW,
537 POWER_SUPPLY_PROP_POWER_AVG,
538 POWER_SUPPLY_PROP_HEALTH,
539 POWER_SUPPLY_PROP_MANUFACTURER,
542 static enum power_supply_property bq27510g2_battery_props[] = {
543 POWER_SUPPLY_PROP_STATUS,
544 POWER_SUPPLY_PROP_PRESENT,
545 POWER_SUPPLY_PROP_VOLTAGE_NOW,
546 POWER_SUPPLY_PROP_CURRENT_NOW,
547 POWER_SUPPLY_PROP_CAPACITY,
548 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
549 POWER_SUPPLY_PROP_TEMP,
550 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
551 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
552 POWER_SUPPLY_PROP_TECHNOLOGY,
553 POWER_SUPPLY_PROP_CHARGE_FULL,
554 POWER_SUPPLY_PROP_CHARGE_NOW,
555 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
556 POWER_SUPPLY_PROP_CYCLE_COUNT,
557 POWER_SUPPLY_PROP_ENERGY_NOW,
558 POWER_SUPPLY_PROP_POWER_AVG,
559 POWER_SUPPLY_PROP_HEALTH,
560 POWER_SUPPLY_PROP_MANUFACTURER,
563 static enum power_supply_property bq27510g3_battery_props[] = {
564 POWER_SUPPLY_PROP_STATUS,
565 POWER_SUPPLY_PROP_PRESENT,
566 POWER_SUPPLY_PROP_VOLTAGE_NOW,
567 POWER_SUPPLY_PROP_CURRENT_NOW,
568 POWER_SUPPLY_PROP_CAPACITY,
569 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
570 POWER_SUPPLY_PROP_TEMP,
571 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
572 POWER_SUPPLY_PROP_TECHNOLOGY,
573 POWER_SUPPLY_PROP_CHARGE_FULL,
574 POWER_SUPPLY_PROP_CHARGE_NOW,
575 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
576 POWER_SUPPLY_PROP_CYCLE_COUNT,
577 POWER_SUPPLY_PROP_HEALTH,
578 POWER_SUPPLY_PROP_MANUFACTURER,
581 static enum power_supply_property bq27520g1_battery_props[] = {
582 POWER_SUPPLY_PROP_STATUS,
583 POWER_SUPPLY_PROP_PRESENT,
584 POWER_SUPPLY_PROP_VOLTAGE_NOW,
585 POWER_SUPPLY_PROP_CURRENT_NOW,
586 POWER_SUPPLY_PROP_CAPACITY,
587 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
588 POWER_SUPPLY_PROP_TEMP,
589 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
590 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
591 POWER_SUPPLY_PROP_TECHNOLOGY,
592 POWER_SUPPLY_PROP_CHARGE_FULL,
593 POWER_SUPPLY_PROP_CHARGE_NOW,
594 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
595 POWER_SUPPLY_PROP_ENERGY_NOW,
596 POWER_SUPPLY_PROP_POWER_AVG,
597 POWER_SUPPLY_PROP_HEALTH,
598 POWER_SUPPLY_PROP_MANUFACTURER,
601 static enum power_supply_property bq27520g2_battery_props[] = {
602 POWER_SUPPLY_PROP_STATUS,
603 POWER_SUPPLY_PROP_PRESENT,
604 POWER_SUPPLY_PROP_VOLTAGE_NOW,
605 POWER_SUPPLY_PROP_CURRENT_NOW,
606 POWER_SUPPLY_PROP_CAPACITY,
607 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
608 POWER_SUPPLY_PROP_TEMP,
609 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
610 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
611 POWER_SUPPLY_PROP_TECHNOLOGY,
612 POWER_SUPPLY_PROP_CHARGE_FULL,
613 POWER_SUPPLY_PROP_CHARGE_NOW,
614 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
615 POWER_SUPPLY_PROP_CYCLE_COUNT,
616 POWER_SUPPLY_PROP_ENERGY_NOW,
617 POWER_SUPPLY_PROP_POWER_AVG,
618 POWER_SUPPLY_PROP_HEALTH,
619 POWER_SUPPLY_PROP_MANUFACTURER,
622 static enum power_supply_property bq27520g3_battery_props[] = {
623 POWER_SUPPLY_PROP_STATUS,
624 POWER_SUPPLY_PROP_PRESENT,
625 POWER_SUPPLY_PROP_VOLTAGE_NOW,
626 POWER_SUPPLY_PROP_CURRENT_NOW,
627 POWER_SUPPLY_PROP_CAPACITY,
628 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
629 POWER_SUPPLY_PROP_TEMP,
630 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
631 POWER_SUPPLY_PROP_TECHNOLOGY,
632 POWER_SUPPLY_PROP_CHARGE_FULL,
633 POWER_SUPPLY_PROP_CHARGE_NOW,
634 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
635 POWER_SUPPLY_PROP_CYCLE_COUNT,
636 POWER_SUPPLY_PROP_ENERGY_NOW,
637 POWER_SUPPLY_PROP_POWER_AVG,
638 POWER_SUPPLY_PROP_HEALTH,
639 POWER_SUPPLY_PROP_MANUFACTURER,
642 static enum power_supply_property bq27520g4_battery_props[] = {
643 POWER_SUPPLY_PROP_STATUS,
644 POWER_SUPPLY_PROP_PRESENT,
645 POWER_SUPPLY_PROP_VOLTAGE_NOW,
646 POWER_SUPPLY_PROP_CURRENT_NOW,
647 POWER_SUPPLY_PROP_CAPACITY,
648 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
649 POWER_SUPPLY_PROP_TEMP,
650 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
651 POWER_SUPPLY_PROP_TECHNOLOGY,
652 POWER_SUPPLY_PROP_CHARGE_FULL,
653 POWER_SUPPLY_PROP_CHARGE_NOW,
654 POWER_SUPPLY_PROP_CYCLE_COUNT,
655 POWER_SUPPLY_PROP_HEALTH,
656 POWER_SUPPLY_PROP_MANUFACTURER,
659 static enum power_supply_property bq27530_battery_props[] = {
660 POWER_SUPPLY_PROP_STATUS,
661 POWER_SUPPLY_PROP_PRESENT,
662 POWER_SUPPLY_PROP_VOLTAGE_NOW,
663 POWER_SUPPLY_PROP_CURRENT_NOW,
664 POWER_SUPPLY_PROP_CAPACITY,
665 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
666 POWER_SUPPLY_PROP_TEMP,
667 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
668 POWER_SUPPLY_PROP_TECHNOLOGY,
669 POWER_SUPPLY_PROP_CHARGE_FULL,
670 POWER_SUPPLY_PROP_CHARGE_NOW,
671 POWER_SUPPLY_PROP_POWER_AVG,
672 POWER_SUPPLY_PROP_HEALTH,
673 POWER_SUPPLY_PROP_CYCLE_COUNT,
674 POWER_SUPPLY_PROP_MANUFACTURER,
677 static enum power_supply_property bq27541_battery_props[] = {
678 POWER_SUPPLY_PROP_STATUS,
679 POWER_SUPPLY_PROP_PRESENT,
680 POWER_SUPPLY_PROP_VOLTAGE_NOW,
681 POWER_SUPPLY_PROP_CURRENT_NOW,
682 POWER_SUPPLY_PROP_CAPACITY,
683 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
684 POWER_SUPPLY_PROP_TEMP,
685 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
686 POWER_SUPPLY_PROP_TECHNOLOGY,
687 POWER_SUPPLY_PROP_CHARGE_FULL,
688 POWER_SUPPLY_PROP_CHARGE_NOW,
689 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
690 POWER_SUPPLY_PROP_CYCLE_COUNT,
691 POWER_SUPPLY_PROP_POWER_AVG,
692 POWER_SUPPLY_PROP_HEALTH,
693 POWER_SUPPLY_PROP_MANUFACTURER,
696 static enum power_supply_property bq27545_battery_props[] = {
697 POWER_SUPPLY_PROP_STATUS,
698 POWER_SUPPLY_PROP_PRESENT,
699 POWER_SUPPLY_PROP_VOLTAGE_NOW,
700 POWER_SUPPLY_PROP_CURRENT_NOW,
701 POWER_SUPPLY_PROP_CAPACITY,
702 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
703 POWER_SUPPLY_PROP_TEMP,
704 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
705 POWER_SUPPLY_PROP_TECHNOLOGY,
706 POWER_SUPPLY_PROP_CHARGE_FULL,
707 POWER_SUPPLY_PROP_CHARGE_NOW,
708 POWER_SUPPLY_PROP_HEALTH,
709 POWER_SUPPLY_PROP_CYCLE_COUNT,
710 POWER_SUPPLY_PROP_POWER_AVG,
711 POWER_SUPPLY_PROP_MANUFACTURER,
714 static enum power_supply_property bq27421_battery_props[] = {
715 POWER_SUPPLY_PROP_STATUS,
716 POWER_SUPPLY_PROP_PRESENT,
717 POWER_SUPPLY_PROP_VOLTAGE_NOW,
718 POWER_SUPPLY_PROP_CURRENT_NOW,
719 POWER_SUPPLY_PROP_CAPACITY,
720 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
721 POWER_SUPPLY_PROP_TEMP,
722 POWER_SUPPLY_PROP_TECHNOLOGY,
723 POWER_SUPPLY_PROP_CHARGE_FULL,
724 POWER_SUPPLY_PROP_CHARGE_NOW,
725 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
726 POWER_SUPPLY_PROP_MANUFACTURER,
729 #define BQ27XXX_PROP(_id, _prop) \
732 .size = ARRAY_SIZE(_prop), \
736 enum power_supply_property *props;
738 } bq27xxx_battery_props[] = {
739 BQ27XXX_PROP(BQ27000, bq27000_battery_props),
740 BQ27XXX_PROP(BQ27010, bq27010_battery_props),
741 BQ27XXX_PROP(BQ2750X, bq2750x_battery_props),
742 BQ27XXX_PROP(BQ2751X, bq2751x_battery_props),
743 BQ27XXX_PROP(BQ27500, bq27500_battery_props),
744 BQ27XXX_PROP(BQ27510G1, bq27510g1_battery_props),
745 BQ27XXX_PROP(BQ27510G2, bq27510g2_battery_props),
746 BQ27XXX_PROP(BQ27510G3, bq27510g3_battery_props),
747 BQ27XXX_PROP(BQ27520G1, bq27520g1_battery_props),
748 BQ27XXX_PROP(BQ27520G2, bq27520g2_battery_props),
749 BQ27XXX_PROP(BQ27520G3, bq27520g3_battery_props),
750 BQ27XXX_PROP(BQ27520G4, bq27520g4_battery_props),
751 BQ27XXX_PROP(BQ27530, bq27530_battery_props),
752 BQ27XXX_PROP(BQ27541, bq27541_battery_props),
753 BQ27XXX_PROP(BQ27545, bq27545_battery_props),
754 BQ27XXX_PROP(BQ27421, bq27421_battery_props),
757 static DEFINE_MUTEX(bq27xxx_list_lock);
758 static LIST_HEAD(bq27xxx_battery_devices);
760 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
762 struct bq27xxx_device_info *di;
763 unsigned int prev_val = *(unsigned int *) kp->arg;
766 ret = param_set_uint(val, kp);
767 if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
770 mutex_lock(&bq27xxx_list_lock);
771 list_for_each_entry(di, &bq27xxx_battery_devices, list) {
772 cancel_delayed_work_sync(&di->work);
773 schedule_delayed_work(&di->work, 0);
775 mutex_unlock(&bq27xxx_list_lock);
780 static const struct kernel_param_ops param_ops_poll_interval = {
781 .get = param_get_uint,
782 .set = poll_interval_param_set,
785 static unsigned int poll_interval = 360;
786 module_param_cb(poll_interval, ¶m_ops_poll_interval, &poll_interval, 0644);
787 MODULE_PARM_DESC(poll_interval,
788 "battery poll interval in seconds - 0 disables polling");
791 * Common code for BQ27xxx devices
794 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
797 /* Reports EINVAL for invalid/missing registers */
798 if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
801 return di->bus.read(di, di->regs[reg_index], single);
805 * Return the battery State-of-Charge
806 * Or < 0 if something fails.
808 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
812 if (di->chip == BQ27000 || di->chip == BQ27010)
813 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
815 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
818 dev_dbg(di->dev, "error reading State-of-Charge\n");
824 * Return a battery charge value in µAh
825 * Or < 0 if something fails.
827 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
831 charge = bq27xxx_read(di, reg, false);
833 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
838 if (di->chip == BQ27000 || di->chip == BQ27010)
839 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
847 * Return the battery Nominal available capacity in µAh
848 * Or < 0 if something fails.
850 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
854 if (di->chip == BQ27000 || di->chip == BQ27010) {
855 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
856 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
860 return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
864 * Return the battery Full Charge Capacity in µAh
865 * Or < 0 if something fails.
867 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
869 return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
873 * Return the Design Capacity in µAh
874 * Or < 0 if something fails.
876 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
880 if (di->chip == BQ27000 || di->chip == BQ27010)
881 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
883 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
886 dev_dbg(di->dev, "error reading initial last measured discharge\n");
890 if (di->chip == BQ27000 || di->chip == BQ27010)
891 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
899 * Return the battery Available energy in µWh
900 * Or < 0 if something fails.
902 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
906 ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
908 dev_dbg(di->dev, "error reading available energy\n");
912 if (di->chip == BQ27000 || di->chip == BQ27010)
913 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
921 * Return the battery temperature in tenths of degree Kelvin
922 * Or < 0 if something fails.
924 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
928 temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
930 dev_err(di->dev, "error reading temperature\n");
934 if (di->chip == BQ27000 || di->chip == BQ27010)
941 * Return the battery Cycle count total
942 * Or < 0 if something fails.
944 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
948 cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
950 dev_err(di->dev, "error reading cycle count total\n");
956 * Read a time register.
957 * Return < 0 if something fails.
959 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
963 tval = bq27xxx_read(di, reg, false);
965 dev_dbg(di->dev, "error reading time register %02x: %d\n",
977 * Read an average power register.
978 * Return < 0 if something fails.
980 static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di)
984 tval = bq27xxx_read(di, BQ27XXX_REG_AP, false);
986 dev_err(di->dev, "error reading average power register %02x: %d\n",
987 BQ27XXX_REG_AP, tval);
991 if (di->chip == BQ27000 || di->chip == BQ27010)
992 return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
998 * Returns true if a battery over temperature condition is detected
1000 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1015 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1018 return flags & BQ27XXX_FLAG_OT;
1025 * Returns true if a battery under temperature condition is detected
1027 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1029 if (di->chip == BQ27530 || di->chip == BQ27421)
1030 return flags & BQ27XXX_FLAG_UT;
1036 * Returns true if a low state of charge condition is detected
1038 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1040 if (di->chip == BQ27000 || di->chip == BQ27010)
1041 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1043 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1047 * Read flag register.
1048 * Return < 0 if something fails.
1050 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1053 bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1055 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1057 dev_err(di->dev, "error reading flag register:%d\n", flags);
1061 /* Unlikely but important to return first */
1062 if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1063 return POWER_SUPPLY_HEALTH_OVERHEAT;
1064 if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1065 return POWER_SUPPLY_HEALTH_COLD;
1066 if (unlikely(bq27xxx_battery_dead(di, flags)))
1067 return POWER_SUPPLY_HEALTH_DEAD;
1069 return POWER_SUPPLY_HEALTH_GOOD;
1072 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1074 struct bq27xxx_reg_cache cache = {0, };
1075 bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010;
1076 bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010;
1078 cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1079 if ((cache.flags & 0xff) == 0xff)
1080 cache.flags = -1; /* read error */
1081 if (cache.flags >= 0) {
1082 cache.temperature = bq27xxx_battery_read_temperature(di);
1083 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1084 dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1085 cache.capacity = -ENODATA;
1086 cache.energy = -ENODATA;
1087 cache.time_to_empty = -ENODATA;
1088 cache.time_to_empty_avg = -ENODATA;
1089 cache.time_to_full = -ENODATA;
1090 cache.charge_full = -ENODATA;
1091 cache.health = -ENODATA;
1093 if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1094 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1095 if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1096 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1097 if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1098 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1099 cache.charge_full = bq27xxx_battery_read_fcc(di);
1100 cache.capacity = bq27xxx_battery_read_soc(di);
1101 if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1102 cache.energy = bq27xxx_battery_read_energy(di);
1103 cache.health = bq27xxx_battery_read_health(di);
1105 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1106 cache.cycle_count = bq27xxx_battery_read_cyct(di);
1107 if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR)
1108 cache.power_avg = bq27xxx_battery_read_pwr_avg(di);
1110 /* We only have to read charge design full once */
1111 if (di->charge_design_full <= 0)
1112 di->charge_design_full = bq27xxx_battery_read_dcap(di);
1115 if (di->cache.capacity != cache.capacity)
1116 power_supply_changed(di->bat);
1118 if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1121 di->last_update = jiffies;
1123 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1125 static void bq27xxx_battery_poll(struct work_struct *work)
1127 struct bq27xxx_device_info *di =
1128 container_of(work, struct bq27xxx_device_info,
1131 bq27xxx_battery_update(di);
1133 if (poll_interval > 0)
1134 schedule_delayed_work(&di->work, poll_interval * HZ);
1138 * Return the battery average current in µA
1139 * Note that current can be negative signed as well
1140 * Or 0 if something fails.
1142 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1143 union power_supply_propval *val)
1148 curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1150 dev_err(di->dev, "error reading current\n");
1154 if (di->chip == BQ27000 || di->chip == BQ27010) {
1155 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1156 if (flags & BQ27000_FLAG_CHGS) {
1157 dev_dbg(di->dev, "negative current!\n");
1161 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1163 /* Other gauges return signed value */
1164 val->intval = (int)((s16)curr) * 1000;
1170 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1171 union power_supply_propval *val)
1175 if (di->chip == BQ27000 || di->chip == BQ27010) {
1176 if (di->cache.flags & BQ27000_FLAG_FC)
1177 status = POWER_SUPPLY_STATUS_FULL;
1178 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1179 status = POWER_SUPPLY_STATUS_CHARGING;
1180 else if (power_supply_am_i_supplied(di->bat))
1181 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1183 status = POWER_SUPPLY_STATUS_DISCHARGING;
1185 if (di->cache.flags & BQ27XXX_FLAG_FC)
1186 status = POWER_SUPPLY_STATUS_FULL;
1187 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1188 status = POWER_SUPPLY_STATUS_DISCHARGING;
1190 status = POWER_SUPPLY_STATUS_CHARGING;
1193 val->intval = status;
1198 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1199 union power_supply_propval *val)
1203 if (di->chip == BQ27000 || di->chip == BQ27010) {
1204 if (di->cache.flags & BQ27000_FLAG_FC)
1205 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1206 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1207 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1208 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1209 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1211 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1213 if (di->cache.flags & BQ27XXX_FLAG_FC)
1214 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1215 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1216 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1217 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1218 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1220 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1223 val->intval = level;
1229 * Return the battery Voltage in millivolts
1230 * Or < 0 if something fails.
1232 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1233 union power_supply_propval *val)
1237 volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1239 dev_err(di->dev, "error reading voltage\n");
1243 val->intval = volt * 1000;
1248 static int bq27xxx_simple_value(int value,
1249 union power_supply_propval *val)
1254 val->intval = value;
1259 static int bq27xxx_battery_get_property(struct power_supply *psy,
1260 enum power_supply_property psp,
1261 union power_supply_propval *val)
1264 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1266 mutex_lock(&di->lock);
1267 if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
1268 cancel_delayed_work_sync(&di->work);
1269 bq27xxx_battery_poll(&di->work.work);
1271 mutex_unlock(&di->lock);
1273 if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1277 case POWER_SUPPLY_PROP_STATUS:
1278 ret = bq27xxx_battery_status(di, val);
1280 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1281 ret = bq27xxx_battery_voltage(di, val);
1283 case POWER_SUPPLY_PROP_PRESENT:
1284 val->intval = di->cache.flags < 0 ? 0 : 1;
1286 case POWER_SUPPLY_PROP_CURRENT_NOW:
1287 ret = bq27xxx_battery_current(di, val);
1289 case POWER_SUPPLY_PROP_CAPACITY:
1290 ret = bq27xxx_simple_value(di->cache.capacity, val);
1292 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1293 ret = bq27xxx_battery_capacity_level(di, val);
1295 case POWER_SUPPLY_PROP_TEMP:
1296 ret = bq27xxx_simple_value(di->cache.temperature, val);
1298 val->intval -= 2731; /* convert decidegree k to c */
1300 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1301 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1303 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1304 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1306 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1307 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1309 case POWER_SUPPLY_PROP_TECHNOLOGY:
1310 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1312 case POWER_SUPPLY_PROP_CHARGE_NOW:
1313 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1315 case POWER_SUPPLY_PROP_CHARGE_FULL:
1316 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1318 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1319 ret = bq27xxx_simple_value(di->charge_design_full, val);
1321 case POWER_SUPPLY_PROP_CYCLE_COUNT:
1322 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1324 case POWER_SUPPLY_PROP_ENERGY_NOW:
1325 ret = bq27xxx_simple_value(di->cache.energy, val);
1327 case POWER_SUPPLY_PROP_POWER_AVG:
1328 ret = bq27xxx_simple_value(di->cache.power_avg, val);
1330 case POWER_SUPPLY_PROP_HEALTH:
1331 ret = bq27xxx_simple_value(di->cache.health, val);
1333 case POWER_SUPPLY_PROP_MANUFACTURER:
1334 val->strval = BQ27XXX_MANUFACTURER;
1343 static void bq27xxx_external_power_changed(struct power_supply *psy)
1345 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1347 cancel_delayed_work_sync(&di->work);
1348 schedule_delayed_work(&di->work, 0);
1351 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1353 struct power_supply_desc *psy_desc;
1354 struct power_supply_config psy_cfg = { .drv_data = di, };
1356 INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1357 mutex_init(&di->lock);
1358 di->regs = bq27xxx_regs[di->chip];
1360 psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1364 psy_desc->name = di->name;
1365 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1366 psy_desc->properties = bq27xxx_battery_props[di->chip].props;
1367 psy_desc->num_properties = bq27xxx_battery_props[di->chip].size;
1368 psy_desc->get_property = bq27xxx_battery_get_property;
1369 psy_desc->external_power_changed = bq27xxx_external_power_changed;
1371 di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1372 if (IS_ERR(di->bat)) {
1373 dev_err(di->dev, "failed to register battery\n");
1374 return PTR_ERR(di->bat);
1377 dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
1379 bq27xxx_battery_update(di);
1381 mutex_lock(&bq27xxx_list_lock);
1382 list_add(&di->list, &bq27xxx_battery_devices);
1383 mutex_unlock(&bq27xxx_list_lock);
1387 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1389 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1392 * power_supply_unregister call bq27xxx_battery_get_property which
1393 * call bq27xxx_battery_poll.
1394 * Make sure that bq27xxx_battery_poll will not call
1395 * schedule_delayed_work again after unregister (which cause OOPS).
1399 cancel_delayed_work_sync(&di->work);
1401 power_supply_unregister(di->bat);
1403 mutex_lock(&bq27xxx_list_lock);
1404 list_del(&di->list);
1405 mutex_unlock(&bq27xxx_list_lock);
1407 mutex_destroy(&di->lock);
1409 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1411 static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg,
1414 struct device *dev = di->dev;
1415 struct bq27xxx_platform_data *pdata = dev->platform_data;
1416 unsigned int timeout = 3;
1421 /* Make sure the value has not changed in between reading the
1422 * lower and the upper part */
1423 upper = pdata->read(dev, reg + 1);
1429 lower = pdata->read(dev, reg);
1433 upper = pdata->read(dev, reg + 1);
1434 } while (temp != upper && --timeout);
1439 return (upper << 8) | lower;
1442 return pdata->read(dev, reg);
1445 static int bq27xxx_battery_platform_probe(struct platform_device *pdev)
1447 struct bq27xxx_device_info *di;
1448 struct bq27xxx_platform_data *pdata = pdev->dev.platform_data;
1451 dev_err(&pdev->dev, "no platform_data supplied\n");
1456 dev_err(&pdev->dev, "no hdq read callback supplied\n");
1461 dev_err(&pdev->dev, "no device supplied\n");
1465 di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
1469 platform_set_drvdata(pdev, di);
1471 di->dev = &pdev->dev;
1472 di->chip = pdata->chip;
1473 di->name = pdata->name ?: dev_name(&pdev->dev);
1474 di->bus.read = bq27xxx_battery_platform_read;
1476 return bq27xxx_battery_setup(di);
1479 static int bq27xxx_battery_platform_remove(struct platform_device *pdev)
1481 struct bq27xxx_device_info *di = platform_get_drvdata(pdev);
1483 bq27xxx_battery_teardown(di);
1488 static const struct platform_device_id bq27xxx_battery_platform_id_table[] = {
1489 { "bq27000-battery", },
1492 MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table);
1495 static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = {
1496 { .compatible = "ti,bq27000" },
1499 MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table);
1502 static struct platform_driver bq27xxx_battery_platform_driver = {
1503 .probe = bq27xxx_battery_platform_probe,
1504 .remove = bq27xxx_battery_platform_remove,
1506 .name = "bq27000-battery",
1507 .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table),
1509 .id_table = bq27xxx_battery_platform_id_table,
1511 module_platform_driver(bq27xxx_battery_platform_driver);
1513 MODULE_ALIAS("platform:bq27000-battery");
1515 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1516 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1517 MODULE_LICENSE("GPL");