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>
8 * Copyright (C) 2017 Liam Breck <kernel@networkimprov.net>
10 * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
12 * This package is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
16 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 * http://www.ti.com/product/bq27000
22 * http://www.ti.com/product/bq27200
23 * http://www.ti.com/product/bq27010
24 * http://www.ti.com/product/bq27210
25 * http://www.ti.com/product/bq27500
26 * http://www.ti.com/product/bq27510-g1
27 * http://www.ti.com/product/bq27510-g2
28 * http://www.ti.com/product/bq27510-g3
29 * http://www.ti.com/product/bq27520-g4
30 * http://www.ti.com/product/bq27520-g1
31 * http://www.ti.com/product/bq27520-g2
32 * http://www.ti.com/product/bq27520-g3
33 * http://www.ti.com/product/bq27520-g4
34 * http://www.ti.com/product/bq27530-g1
35 * http://www.ti.com/product/bq27531-g1
36 * http://www.ti.com/product/bq27541-g1
37 * http://www.ti.com/product/bq27542-g1
38 * http://www.ti.com/product/bq27546-g1
39 * http://www.ti.com/product/bq27742-g1
40 * http://www.ti.com/product/bq27545-g1
41 * http://www.ti.com/product/bq27421-g1
42 * http://www.ti.com/product/bq27425-g1
43 * http://www.ti.com/product/bq27411-g1
44 * http://www.ti.com/product/bq27621-g1
47 #include <linux/device.h>
48 #include <linux/module.h>
49 #include <linux/mutex.h>
50 #include <linux/param.h>
51 #include <linux/jiffies.h>
52 #include <linux/workqueue.h>
53 #include <linux/delay.h>
54 #include <linux/platform_device.h>
55 #include <linux/power_supply.h>
56 #include <linux/slab.h>
59 #include <linux/power/bq27xxx_battery.h>
61 #define BQ27XXX_MANUFACTURER "Texas Instruments"
64 #define BQ27XXX_FLAG_DSC BIT(0)
65 #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
66 #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
67 #define BQ27XXX_FLAG_CFGUP BIT(4)
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 /* control register params */
82 #define BQ27XXX_SEALED 0x20
83 #define BQ27XXX_SET_CFGUPDATE 0x13
84 #define BQ27XXX_SOFT_RESET 0x42
85 #define BQ27XXX_RESET 0x41
87 #define BQ27XXX_RS (20) /* Resistor sense mOhm */
88 #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */
89 #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */
91 #define INVALID_REG_ADDR 0xff
94 * bq27xxx_reg_index - Register names
96 * These are indexes into a device's register mapping array.
99 enum bq27xxx_reg_index {
100 BQ27XXX_REG_CTRL = 0, /* Control */
101 BQ27XXX_REG_TEMP, /* Temperature */
102 BQ27XXX_REG_INT_TEMP, /* Internal Temperature */
103 BQ27XXX_REG_VOLT, /* Voltage */
104 BQ27XXX_REG_AI, /* Average Current */
105 BQ27XXX_REG_FLAGS, /* Flags */
106 BQ27XXX_REG_TTE, /* Time-to-Empty */
107 BQ27XXX_REG_TTF, /* Time-to-Full */
108 BQ27XXX_REG_TTES, /* Time-to-Empty Standby */
109 BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */
110 BQ27XXX_REG_NAC, /* Nominal Available Capacity */
111 BQ27XXX_REG_FCC, /* Full Charge Capacity */
112 BQ27XXX_REG_CYCT, /* Cycle Count */
113 BQ27XXX_REG_AE, /* Available Energy */
114 BQ27XXX_REG_SOC, /* State-of-Charge */
115 BQ27XXX_REG_DCAP, /* Design Capacity */
116 BQ27XXX_REG_AP, /* Average Power */
117 BQ27XXX_DM_CTRL, /* Block Data Control */
118 BQ27XXX_DM_CLASS, /* Data Class */
119 BQ27XXX_DM_BLOCK, /* Data Block */
120 BQ27XXX_DM_DATA, /* Block Data */
121 BQ27XXX_DM_CKSUM, /* Block Data Checksum */
122 BQ27XXX_REG_MAX, /* sentinel */
125 #define BQ27XXX_DM_REG_ROWS \
126 [BQ27XXX_DM_CTRL] = 0x61, \
127 [BQ27XXX_DM_CLASS] = 0x3e, \
128 [BQ27XXX_DM_BLOCK] = 0x3f, \
129 [BQ27XXX_DM_DATA] = 0x40, \
130 [BQ27XXX_DM_CKSUM] = 0x60
132 /* Register mappings */
134 bq27000_regs[BQ27XXX_REG_MAX] = {
135 [BQ27XXX_REG_CTRL] = 0x00,
136 [BQ27XXX_REG_TEMP] = 0x06,
137 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
138 [BQ27XXX_REG_VOLT] = 0x08,
139 [BQ27XXX_REG_AI] = 0x14,
140 [BQ27XXX_REG_FLAGS] = 0x0a,
141 [BQ27XXX_REG_TTE] = 0x16,
142 [BQ27XXX_REG_TTF] = 0x18,
143 [BQ27XXX_REG_TTES] = 0x1c,
144 [BQ27XXX_REG_TTECP] = 0x26,
145 [BQ27XXX_REG_NAC] = 0x0c,
146 [BQ27XXX_REG_FCC] = 0x12,
147 [BQ27XXX_REG_CYCT] = 0x2a,
148 [BQ27XXX_REG_AE] = 0x22,
149 [BQ27XXX_REG_SOC] = 0x0b,
150 [BQ27XXX_REG_DCAP] = 0x76,
151 [BQ27XXX_REG_AP] = 0x24,
152 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
153 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
154 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
155 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
156 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
158 bq27010_regs[BQ27XXX_REG_MAX] = {
159 [BQ27XXX_REG_CTRL] = 0x00,
160 [BQ27XXX_REG_TEMP] = 0x06,
161 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
162 [BQ27XXX_REG_VOLT] = 0x08,
163 [BQ27XXX_REG_AI] = 0x14,
164 [BQ27XXX_REG_FLAGS] = 0x0a,
165 [BQ27XXX_REG_TTE] = 0x16,
166 [BQ27XXX_REG_TTF] = 0x18,
167 [BQ27XXX_REG_TTES] = 0x1c,
168 [BQ27XXX_REG_TTECP] = 0x26,
169 [BQ27XXX_REG_NAC] = 0x0c,
170 [BQ27XXX_REG_FCC] = 0x12,
171 [BQ27XXX_REG_CYCT] = 0x2a,
172 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
173 [BQ27XXX_REG_SOC] = 0x0b,
174 [BQ27XXX_REG_DCAP] = 0x76,
175 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
176 [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR,
177 [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR,
178 [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR,
179 [BQ27XXX_DM_DATA] = INVALID_REG_ADDR,
180 [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR,
182 bq2750x_regs[BQ27XXX_REG_MAX] = {
183 [BQ27XXX_REG_CTRL] = 0x00,
184 [BQ27XXX_REG_TEMP] = 0x06,
185 [BQ27XXX_REG_INT_TEMP] = 0x28,
186 [BQ27XXX_REG_VOLT] = 0x08,
187 [BQ27XXX_REG_AI] = 0x14,
188 [BQ27XXX_REG_FLAGS] = 0x0a,
189 [BQ27XXX_REG_TTE] = 0x16,
190 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
191 [BQ27XXX_REG_TTES] = 0x1a,
192 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
193 [BQ27XXX_REG_NAC] = 0x0c,
194 [BQ27XXX_REG_FCC] = 0x12,
195 [BQ27XXX_REG_CYCT] = 0x2a,
196 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
197 [BQ27XXX_REG_SOC] = 0x2c,
198 [BQ27XXX_REG_DCAP] = 0x3c,
199 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
202 #define bq2751x_regs bq27510g3_regs
203 #define bq2752x_regs bq27510g3_regs
204 bq27500_regs[BQ27XXX_REG_MAX] = {
205 [BQ27XXX_REG_CTRL] = 0x00,
206 [BQ27XXX_REG_TEMP] = 0x06,
207 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
208 [BQ27XXX_REG_VOLT] = 0x08,
209 [BQ27XXX_REG_AI] = 0x14,
210 [BQ27XXX_REG_FLAGS] = 0x0a,
211 [BQ27XXX_REG_TTE] = 0x16,
212 [BQ27XXX_REG_TTF] = 0x18,
213 [BQ27XXX_REG_TTES] = 0x1c,
214 [BQ27XXX_REG_TTECP] = 0x26,
215 [BQ27XXX_REG_NAC] = 0x0c,
216 [BQ27XXX_REG_FCC] = 0x12,
217 [BQ27XXX_REG_CYCT] = 0x2a,
218 [BQ27XXX_REG_AE] = 0x22,
219 [BQ27XXX_REG_SOC] = 0x2c,
220 [BQ27XXX_REG_DCAP] = 0x3c,
221 [BQ27XXX_REG_AP] = 0x24,
224 #define bq27510g1_regs bq27500_regs
225 #define bq27510g2_regs bq27500_regs
226 bq27510g3_regs[BQ27XXX_REG_MAX] = {
227 [BQ27XXX_REG_CTRL] = 0x00,
228 [BQ27XXX_REG_TEMP] = 0x06,
229 [BQ27XXX_REG_INT_TEMP] = 0x28,
230 [BQ27XXX_REG_VOLT] = 0x08,
231 [BQ27XXX_REG_AI] = 0x14,
232 [BQ27XXX_REG_FLAGS] = 0x0a,
233 [BQ27XXX_REG_TTE] = 0x16,
234 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
235 [BQ27XXX_REG_TTES] = 0x1a,
236 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
237 [BQ27XXX_REG_NAC] = 0x0c,
238 [BQ27XXX_REG_FCC] = 0x12,
239 [BQ27XXX_REG_CYCT] = 0x1e,
240 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
241 [BQ27XXX_REG_SOC] = 0x20,
242 [BQ27XXX_REG_DCAP] = 0x2e,
243 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
246 bq27520g1_regs[BQ27XXX_REG_MAX] = {
247 [BQ27XXX_REG_CTRL] = 0x00,
248 [BQ27XXX_REG_TEMP] = 0x06,
249 [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR,
250 [BQ27XXX_REG_VOLT] = 0x08,
251 [BQ27XXX_REG_AI] = 0x14,
252 [BQ27XXX_REG_FLAGS] = 0x0a,
253 [BQ27XXX_REG_TTE] = 0x16,
254 [BQ27XXX_REG_TTF] = 0x18,
255 [BQ27XXX_REG_TTES] = 0x1c,
256 [BQ27XXX_REG_TTECP] = 0x26,
257 [BQ27XXX_REG_NAC] = 0x0c,
258 [BQ27XXX_REG_FCC] = 0x12,
259 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
260 [BQ27XXX_REG_AE] = 0x22,
261 [BQ27XXX_REG_SOC] = 0x2c,
262 [BQ27XXX_REG_DCAP] = 0x3c,
263 [BQ27XXX_REG_AP] = 0x24,
266 bq27520g2_regs[BQ27XXX_REG_MAX] = {
267 [BQ27XXX_REG_CTRL] = 0x00,
268 [BQ27XXX_REG_TEMP] = 0x06,
269 [BQ27XXX_REG_INT_TEMP] = 0x36,
270 [BQ27XXX_REG_VOLT] = 0x08,
271 [BQ27XXX_REG_AI] = 0x14,
272 [BQ27XXX_REG_FLAGS] = 0x0a,
273 [BQ27XXX_REG_TTE] = 0x16,
274 [BQ27XXX_REG_TTF] = 0x18,
275 [BQ27XXX_REG_TTES] = 0x1c,
276 [BQ27XXX_REG_TTECP] = 0x26,
277 [BQ27XXX_REG_NAC] = 0x0c,
278 [BQ27XXX_REG_FCC] = 0x12,
279 [BQ27XXX_REG_CYCT] = 0x2a,
280 [BQ27XXX_REG_AE] = 0x22,
281 [BQ27XXX_REG_SOC] = 0x2c,
282 [BQ27XXX_REG_DCAP] = 0x3c,
283 [BQ27XXX_REG_AP] = 0x24,
286 bq27520g3_regs[BQ27XXX_REG_MAX] = {
287 [BQ27XXX_REG_CTRL] = 0x00,
288 [BQ27XXX_REG_TEMP] = 0x06,
289 [BQ27XXX_REG_INT_TEMP] = 0x36,
290 [BQ27XXX_REG_VOLT] = 0x08,
291 [BQ27XXX_REG_AI] = 0x14,
292 [BQ27XXX_REG_FLAGS] = 0x0a,
293 [BQ27XXX_REG_TTE] = 0x16,
294 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
295 [BQ27XXX_REG_TTES] = 0x1c,
296 [BQ27XXX_REG_TTECP] = 0x26,
297 [BQ27XXX_REG_NAC] = 0x0c,
298 [BQ27XXX_REG_FCC] = 0x12,
299 [BQ27XXX_REG_CYCT] = 0x2a,
300 [BQ27XXX_REG_AE] = 0x22,
301 [BQ27XXX_REG_SOC] = 0x2c,
302 [BQ27XXX_REG_DCAP] = 0x3c,
303 [BQ27XXX_REG_AP] = 0x24,
306 bq27520g4_regs[BQ27XXX_REG_MAX] = {
307 [BQ27XXX_REG_CTRL] = 0x00,
308 [BQ27XXX_REG_TEMP] = 0x06,
309 [BQ27XXX_REG_INT_TEMP] = 0x28,
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] = INVALID_REG_ADDR,
317 [BQ27XXX_REG_NAC] = 0x0c,
318 [BQ27XXX_REG_FCC] = 0x12,
319 [BQ27XXX_REG_CYCT] = 0x1e,
320 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
321 [BQ27XXX_REG_SOC] = 0x20,
322 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
323 [BQ27XXX_REG_AP] = INVALID_REG_ADDR,
326 bq27530_regs[BQ27XXX_REG_MAX] = {
327 [BQ27XXX_REG_CTRL] = 0x00,
328 [BQ27XXX_REG_TEMP] = 0x06,
329 [BQ27XXX_REG_INT_TEMP] = 0x32,
330 [BQ27XXX_REG_VOLT] = 0x08,
331 [BQ27XXX_REG_AI] = 0x14,
332 [BQ27XXX_REG_FLAGS] = 0x0a,
333 [BQ27XXX_REG_TTE] = 0x16,
334 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
335 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
336 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
337 [BQ27XXX_REG_NAC] = 0x0c,
338 [BQ27XXX_REG_FCC] = 0x12,
339 [BQ27XXX_REG_CYCT] = 0x2a,
340 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
341 [BQ27XXX_REG_SOC] = 0x2c,
342 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
343 [BQ27XXX_REG_AP] = 0x24,
346 #define bq27531_regs bq27530_regs
347 bq27541_regs[BQ27XXX_REG_MAX] = {
348 [BQ27XXX_REG_CTRL] = 0x00,
349 [BQ27XXX_REG_TEMP] = 0x06,
350 [BQ27XXX_REG_INT_TEMP] = 0x28,
351 [BQ27XXX_REG_VOLT] = 0x08,
352 [BQ27XXX_REG_AI] = 0x14,
353 [BQ27XXX_REG_FLAGS] = 0x0a,
354 [BQ27XXX_REG_TTE] = 0x16,
355 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
356 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
357 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
358 [BQ27XXX_REG_NAC] = 0x0c,
359 [BQ27XXX_REG_FCC] = 0x12,
360 [BQ27XXX_REG_CYCT] = 0x2a,
361 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
362 [BQ27XXX_REG_SOC] = 0x2c,
363 [BQ27XXX_REG_DCAP] = 0x3c,
364 [BQ27XXX_REG_AP] = 0x24,
367 #define bq27542_regs bq27541_regs
368 #define bq27546_regs bq27541_regs
369 #define bq27742_regs bq27541_regs
370 bq27545_regs[BQ27XXX_REG_MAX] = {
371 [BQ27XXX_REG_CTRL] = 0x00,
372 [BQ27XXX_REG_TEMP] = 0x06,
373 [BQ27XXX_REG_INT_TEMP] = 0x28,
374 [BQ27XXX_REG_VOLT] = 0x08,
375 [BQ27XXX_REG_AI] = 0x14,
376 [BQ27XXX_REG_FLAGS] = 0x0a,
377 [BQ27XXX_REG_TTE] = 0x16,
378 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
379 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
380 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
381 [BQ27XXX_REG_NAC] = 0x0c,
382 [BQ27XXX_REG_FCC] = 0x12,
383 [BQ27XXX_REG_CYCT] = 0x2a,
384 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
385 [BQ27XXX_REG_SOC] = 0x2c,
386 [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR,
387 [BQ27XXX_REG_AP] = 0x24,
390 bq27421_regs[BQ27XXX_REG_MAX] = {
391 [BQ27XXX_REG_CTRL] = 0x00,
392 [BQ27XXX_REG_TEMP] = 0x02,
393 [BQ27XXX_REG_INT_TEMP] = 0x1e,
394 [BQ27XXX_REG_VOLT] = 0x04,
395 [BQ27XXX_REG_AI] = 0x10,
396 [BQ27XXX_REG_FLAGS] = 0x06,
397 [BQ27XXX_REG_TTE] = INVALID_REG_ADDR,
398 [BQ27XXX_REG_TTF] = INVALID_REG_ADDR,
399 [BQ27XXX_REG_TTES] = INVALID_REG_ADDR,
400 [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR,
401 [BQ27XXX_REG_NAC] = 0x08,
402 [BQ27XXX_REG_FCC] = 0x0e,
403 [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR,
404 [BQ27XXX_REG_AE] = INVALID_REG_ADDR,
405 [BQ27XXX_REG_SOC] = 0x1c,
406 [BQ27XXX_REG_DCAP] = 0x3c,
407 [BQ27XXX_REG_AP] = 0x18,
410 #define bq27425_regs bq27421_regs
411 #define bq27441_regs bq27421_regs
412 #define bq27621_regs bq27421_regs
414 static enum power_supply_property bq27000_props[] = {
415 POWER_SUPPLY_PROP_STATUS,
416 POWER_SUPPLY_PROP_PRESENT,
417 POWER_SUPPLY_PROP_VOLTAGE_NOW,
418 POWER_SUPPLY_PROP_CURRENT_NOW,
419 POWER_SUPPLY_PROP_CAPACITY,
420 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
421 POWER_SUPPLY_PROP_TEMP,
422 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
423 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
424 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
425 POWER_SUPPLY_PROP_TECHNOLOGY,
426 POWER_SUPPLY_PROP_CHARGE_FULL,
427 POWER_SUPPLY_PROP_CHARGE_NOW,
428 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
429 POWER_SUPPLY_PROP_CYCLE_COUNT,
430 POWER_SUPPLY_PROP_ENERGY_NOW,
431 POWER_SUPPLY_PROP_POWER_AVG,
432 POWER_SUPPLY_PROP_HEALTH,
433 POWER_SUPPLY_PROP_MANUFACTURER,
436 static enum power_supply_property bq27010_props[] = {
437 POWER_SUPPLY_PROP_STATUS,
438 POWER_SUPPLY_PROP_PRESENT,
439 POWER_SUPPLY_PROP_VOLTAGE_NOW,
440 POWER_SUPPLY_PROP_CURRENT_NOW,
441 POWER_SUPPLY_PROP_CAPACITY,
442 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
443 POWER_SUPPLY_PROP_TEMP,
444 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
445 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
446 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
447 POWER_SUPPLY_PROP_TECHNOLOGY,
448 POWER_SUPPLY_PROP_CHARGE_FULL,
449 POWER_SUPPLY_PROP_CHARGE_NOW,
450 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
451 POWER_SUPPLY_PROP_CYCLE_COUNT,
452 POWER_SUPPLY_PROP_HEALTH,
453 POWER_SUPPLY_PROP_MANUFACTURER,
456 #define bq2750x_props bq27510g3_props
457 #define bq2751x_props bq27510g3_props
458 #define bq2752x_props bq27510g3_props
460 static enum power_supply_property bq27500_props[] = {
461 POWER_SUPPLY_PROP_STATUS,
462 POWER_SUPPLY_PROP_PRESENT,
463 POWER_SUPPLY_PROP_VOLTAGE_NOW,
464 POWER_SUPPLY_PROP_CURRENT_NOW,
465 POWER_SUPPLY_PROP_CAPACITY,
466 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
467 POWER_SUPPLY_PROP_TEMP,
468 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
469 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
470 POWER_SUPPLY_PROP_TECHNOLOGY,
471 POWER_SUPPLY_PROP_CHARGE_FULL,
472 POWER_SUPPLY_PROP_CHARGE_NOW,
473 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
474 POWER_SUPPLY_PROP_CYCLE_COUNT,
475 POWER_SUPPLY_PROP_ENERGY_NOW,
476 POWER_SUPPLY_PROP_POWER_AVG,
477 POWER_SUPPLY_PROP_HEALTH,
478 POWER_SUPPLY_PROP_MANUFACTURER,
480 #define bq27510g1_props bq27500_props
481 #define bq27510g2_props bq27500_props
483 static enum power_supply_property bq27510g3_props[] = {
484 POWER_SUPPLY_PROP_STATUS,
485 POWER_SUPPLY_PROP_PRESENT,
486 POWER_SUPPLY_PROP_VOLTAGE_NOW,
487 POWER_SUPPLY_PROP_CURRENT_NOW,
488 POWER_SUPPLY_PROP_CAPACITY,
489 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
490 POWER_SUPPLY_PROP_TEMP,
491 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
492 POWER_SUPPLY_PROP_TECHNOLOGY,
493 POWER_SUPPLY_PROP_CHARGE_FULL,
494 POWER_SUPPLY_PROP_CHARGE_NOW,
495 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
496 POWER_SUPPLY_PROP_CYCLE_COUNT,
497 POWER_SUPPLY_PROP_HEALTH,
498 POWER_SUPPLY_PROP_MANUFACTURER,
501 static enum power_supply_property bq27520g1_props[] = {
502 POWER_SUPPLY_PROP_STATUS,
503 POWER_SUPPLY_PROP_PRESENT,
504 POWER_SUPPLY_PROP_VOLTAGE_NOW,
505 POWER_SUPPLY_PROP_CURRENT_NOW,
506 POWER_SUPPLY_PROP_CAPACITY,
507 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
508 POWER_SUPPLY_PROP_TEMP,
509 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
510 POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
511 POWER_SUPPLY_PROP_TECHNOLOGY,
512 POWER_SUPPLY_PROP_CHARGE_FULL,
513 POWER_SUPPLY_PROP_CHARGE_NOW,
514 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
515 POWER_SUPPLY_PROP_ENERGY_NOW,
516 POWER_SUPPLY_PROP_POWER_AVG,
517 POWER_SUPPLY_PROP_HEALTH,
518 POWER_SUPPLY_PROP_MANUFACTURER,
521 #define bq27520g2_props bq27500_props
523 static enum power_supply_property bq27520g3_props[] = {
524 POWER_SUPPLY_PROP_STATUS,
525 POWER_SUPPLY_PROP_PRESENT,
526 POWER_SUPPLY_PROP_VOLTAGE_NOW,
527 POWER_SUPPLY_PROP_CURRENT_NOW,
528 POWER_SUPPLY_PROP_CAPACITY,
529 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
530 POWER_SUPPLY_PROP_TEMP,
531 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
532 POWER_SUPPLY_PROP_TECHNOLOGY,
533 POWER_SUPPLY_PROP_CHARGE_FULL,
534 POWER_SUPPLY_PROP_CHARGE_NOW,
535 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
536 POWER_SUPPLY_PROP_CYCLE_COUNT,
537 POWER_SUPPLY_PROP_ENERGY_NOW,
538 POWER_SUPPLY_PROP_POWER_AVG,
539 POWER_SUPPLY_PROP_HEALTH,
540 POWER_SUPPLY_PROP_MANUFACTURER,
543 static enum power_supply_property bq27520g4_props[] = {
544 POWER_SUPPLY_PROP_STATUS,
545 POWER_SUPPLY_PROP_PRESENT,
546 POWER_SUPPLY_PROP_VOLTAGE_NOW,
547 POWER_SUPPLY_PROP_CURRENT_NOW,
548 POWER_SUPPLY_PROP_CAPACITY,
549 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
550 POWER_SUPPLY_PROP_TEMP,
551 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
552 POWER_SUPPLY_PROP_TECHNOLOGY,
553 POWER_SUPPLY_PROP_CHARGE_FULL,
554 POWER_SUPPLY_PROP_CHARGE_NOW,
555 POWER_SUPPLY_PROP_CYCLE_COUNT,
556 POWER_SUPPLY_PROP_HEALTH,
557 POWER_SUPPLY_PROP_MANUFACTURER,
560 static enum power_supply_property bq27530_props[] = {
561 POWER_SUPPLY_PROP_STATUS,
562 POWER_SUPPLY_PROP_PRESENT,
563 POWER_SUPPLY_PROP_VOLTAGE_NOW,
564 POWER_SUPPLY_PROP_CURRENT_NOW,
565 POWER_SUPPLY_PROP_CAPACITY,
566 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
567 POWER_SUPPLY_PROP_TEMP,
568 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
569 POWER_SUPPLY_PROP_TECHNOLOGY,
570 POWER_SUPPLY_PROP_CHARGE_FULL,
571 POWER_SUPPLY_PROP_CHARGE_NOW,
572 POWER_SUPPLY_PROP_POWER_AVG,
573 POWER_SUPPLY_PROP_HEALTH,
574 POWER_SUPPLY_PROP_CYCLE_COUNT,
575 POWER_SUPPLY_PROP_MANUFACTURER,
577 #define bq27531_props bq27530_props
579 static enum power_supply_property bq27541_props[] = {
580 POWER_SUPPLY_PROP_STATUS,
581 POWER_SUPPLY_PROP_PRESENT,
582 POWER_SUPPLY_PROP_VOLTAGE_NOW,
583 POWER_SUPPLY_PROP_CURRENT_NOW,
584 POWER_SUPPLY_PROP_CAPACITY,
585 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
586 POWER_SUPPLY_PROP_TEMP,
587 POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
588 POWER_SUPPLY_PROP_TECHNOLOGY,
589 POWER_SUPPLY_PROP_CHARGE_FULL,
590 POWER_SUPPLY_PROP_CHARGE_NOW,
591 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
592 POWER_SUPPLY_PROP_CYCLE_COUNT,
593 POWER_SUPPLY_PROP_POWER_AVG,
594 POWER_SUPPLY_PROP_HEALTH,
595 POWER_SUPPLY_PROP_MANUFACTURER,
597 #define bq27542_props bq27541_props
598 #define bq27546_props bq27541_props
599 #define bq27742_props bq27541_props
601 static enum power_supply_property bq27545_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_TECHNOLOGY,
611 POWER_SUPPLY_PROP_CHARGE_FULL,
612 POWER_SUPPLY_PROP_CHARGE_NOW,
613 POWER_SUPPLY_PROP_HEALTH,
614 POWER_SUPPLY_PROP_CYCLE_COUNT,
615 POWER_SUPPLY_PROP_POWER_AVG,
616 POWER_SUPPLY_PROP_MANUFACTURER,
619 static enum power_supply_property bq27421_props[] = {
620 POWER_SUPPLY_PROP_STATUS,
621 POWER_SUPPLY_PROP_PRESENT,
622 POWER_SUPPLY_PROP_VOLTAGE_NOW,
623 POWER_SUPPLY_PROP_CURRENT_NOW,
624 POWER_SUPPLY_PROP_CAPACITY,
625 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
626 POWER_SUPPLY_PROP_TEMP,
627 POWER_SUPPLY_PROP_TECHNOLOGY,
628 POWER_SUPPLY_PROP_CHARGE_FULL,
629 POWER_SUPPLY_PROP_CHARGE_NOW,
630 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
631 POWER_SUPPLY_PROP_MANUFACTURER,
633 #define bq27425_props bq27421_props
634 #define bq27441_props bq27421_props
635 #define bq27621_props bq27421_props
637 struct bq27xxx_dm_reg {
644 enum bq27xxx_dm_reg_id {
645 BQ27XXX_DM_DESIGN_CAPACITY = 0,
646 BQ27XXX_DM_DESIGN_ENERGY,
647 BQ27XXX_DM_TERMINATE_VOLTAGE,
650 #define bq27000_dm_regs 0
651 #define bq27010_dm_regs 0
652 #define bq2750x_dm_regs 0
653 #define bq2751x_dm_regs 0
654 #define bq2752x_dm_regs 0
656 #if 0 /* not yet tested */
657 static struct bq27xxx_dm_reg bq27500_dm_regs[] = {
658 [BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 10, 2, 0, 65535 },
659 [BQ27XXX_DM_DESIGN_ENERGY] = { }, /* missing on chip */
660 [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 48, 2, 1000, 32767 },
663 #define bq27500_dm_regs 0
666 /* todo create data memory definitions from datasheets and test on chips */
667 #define bq27510g1_dm_regs 0
668 #define bq27510g2_dm_regs 0
669 #define bq27510g3_dm_regs 0
670 #define bq27520g1_dm_regs 0
671 #define bq27520g2_dm_regs 0
672 #define bq27520g3_dm_regs 0
673 #define bq27520g4_dm_regs 0
674 #define bq27530_dm_regs 0
675 #define bq27531_dm_regs 0
676 #define bq27541_dm_regs 0
677 #define bq27542_dm_regs 0
678 #define bq27546_dm_regs 0
679 #define bq27742_dm_regs 0
681 #if 0 /* not yet tested */
682 static struct bq27xxx_dm_reg bq27545_dm_regs[] = {
683 [BQ27XXX_DM_DESIGN_CAPACITY] = { 48, 23, 2, 0, 32767 },
684 [BQ27XXX_DM_DESIGN_ENERGY] = { 48, 25, 2, 0, 32767 },
685 [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 80, 67, 2, 2800, 3700 },
688 #define bq27545_dm_regs 0
691 static struct bq27xxx_dm_reg bq27421_dm_regs[] = {
692 [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 10, 2, 0, 8000 },
693 [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 12, 2, 0, 32767 },
694 [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 16, 2, 2500, 3700 },
697 static struct bq27xxx_dm_reg bq27425_dm_regs[] = {
698 [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 12, 2, 0, 32767 },
699 [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 14, 2, 0, 32767 },
700 [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 18, 2, 2800, 3700 },
703 #if 0 /* not yet tested */
704 #define bq27441_dm_regs bq27421_dm_regs
706 #define bq27441_dm_regs 0
709 #if 0 /* not yet tested */
710 static struct bq27xxx_dm_reg bq27621_dm_regs[] = {
711 [BQ27XXX_DM_DESIGN_CAPACITY] = { 82, 3, 2, 0, 8000 },
712 [BQ27XXX_DM_DESIGN_ENERGY] = { 82, 5, 2, 0, 32767 },
713 [BQ27XXX_DM_TERMINATE_VOLTAGE] = { 82, 9, 2, 2500, 3700 },
716 #define bq27621_dm_regs 0
719 #define BQ27XXX_O_ZERO 0x00000001
720 #define BQ27XXX_O_OTDC 0x00000002
721 #define BQ27XXX_O_UTOT 0x00000004
722 #define BQ27XXX_O_CFGUP 0x00000008
723 #define BQ27XXX_O_RAM 0x00000010
725 #define BQ27XXX_DATA(ref, key, opt) { \
728 .regs = ref##_regs, \
729 .dm_regs = ref##_dm_regs, \
730 .props = ref##_props, \
731 .props_size = ARRAY_SIZE(ref##_props) }
737 struct bq27xxx_dm_reg *dm_regs;
738 enum power_supply_property *props;
740 } bq27xxx_chip_data[] = {
741 [BQ27000] = BQ27XXX_DATA(bq27000, 0 , BQ27XXX_O_ZERO),
742 [BQ27010] = BQ27XXX_DATA(bq27010, 0 , BQ27XXX_O_ZERO),
743 [BQ2750X] = BQ27XXX_DATA(bq2750x, 0 , BQ27XXX_O_OTDC),
744 [BQ2751X] = BQ27XXX_DATA(bq2751x, 0 , BQ27XXX_O_OTDC),
745 [BQ2752X] = BQ27XXX_DATA(bq2752x, 0 , BQ27XXX_O_OTDC),
746 [BQ27500] = BQ27XXX_DATA(bq27500, 0x04143672, BQ27XXX_O_OTDC),
747 [BQ27510G1] = BQ27XXX_DATA(bq27510g1, 0 , BQ27XXX_O_OTDC),
748 [BQ27510G2] = BQ27XXX_DATA(bq27510g2, 0 , BQ27XXX_O_OTDC),
749 [BQ27510G3] = BQ27XXX_DATA(bq27510g3, 0 , BQ27XXX_O_OTDC),
750 [BQ27520G1] = BQ27XXX_DATA(bq27520g1, 0 , BQ27XXX_O_OTDC),
751 [BQ27520G2] = BQ27XXX_DATA(bq27520g2, 0 , BQ27XXX_O_OTDC),
752 [BQ27520G3] = BQ27XXX_DATA(bq27520g3, 0 , BQ27XXX_O_OTDC),
753 [BQ27520G4] = BQ27XXX_DATA(bq27520g4, 0 , BQ27XXX_O_OTDC),
754 [BQ27530] = BQ27XXX_DATA(bq27530, 0 , BQ27XXX_O_UTOT),
755 [BQ27531] = BQ27XXX_DATA(bq27531, 0 , BQ27XXX_O_UTOT),
756 [BQ27541] = BQ27XXX_DATA(bq27541, 0 , BQ27XXX_O_OTDC),
757 [BQ27542] = BQ27XXX_DATA(bq27542, 0 , BQ27XXX_O_OTDC),
758 [BQ27546] = BQ27XXX_DATA(bq27546, 0 , BQ27XXX_O_OTDC),
759 [BQ27742] = BQ27XXX_DATA(bq27742, 0 , BQ27XXX_O_OTDC),
760 [BQ27545] = BQ27XXX_DATA(bq27545, 0x04143672, BQ27XXX_O_OTDC),
761 [BQ27421] = BQ27XXX_DATA(bq27421, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
762 [BQ27425] = BQ27XXX_DATA(bq27425, 0x04143672, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP),
763 [BQ27441] = BQ27XXX_DATA(bq27441, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
764 [BQ27621] = BQ27XXX_DATA(bq27621, 0x80008000, BQ27XXX_O_UTOT | BQ27XXX_O_CFGUP | BQ27XXX_O_RAM),
767 static DEFINE_MUTEX(bq27xxx_list_lock);
768 static LIST_HEAD(bq27xxx_battery_devices);
770 #define BQ27XXX_MSLEEP(i) usleep_range((i)*1000, (i)*1000+500)
772 #define BQ27XXX_DM_SZ 32
775 * struct bq27xxx_dm_buf - chip data memory buffer
776 * @class: data memory subclass_id
777 * @block: data memory block number
778 * @data: data from/for the block
779 * @has_data: true if data has been filled by read
780 * @dirty: true if data has changed since last read/write
782 * Encapsulates info required to manage chip data memory blocks.
784 struct bq27xxx_dm_buf {
787 u8 data[BQ27XXX_DM_SZ];
788 bool has_data, dirty;
791 #define BQ27XXX_DM_BUF(di, i) { \
792 .class = (di)->dm_regs[i].subclass_id, \
793 .block = (di)->dm_regs[i].offset / BQ27XXX_DM_SZ, \
796 static inline u16 *bq27xxx_dm_reg_ptr(struct bq27xxx_dm_buf *buf,
797 struct bq27xxx_dm_reg *reg)
799 if (buf->class == reg->subclass_id &&
800 buf->block == reg->offset / BQ27XXX_DM_SZ)
801 return (u16 *) (buf->data + reg->offset % BQ27XXX_DM_SZ);
806 static const char * const bq27xxx_dm_reg_name[] = {
807 [BQ27XXX_DM_DESIGN_CAPACITY] = "design-capacity",
808 [BQ27XXX_DM_DESIGN_ENERGY] = "design-energy",
809 [BQ27XXX_DM_TERMINATE_VOLTAGE] = "terminate-voltage",
813 static bool bq27xxx_dt_to_nvm = true;
814 module_param_named(dt_monitored_battery_updates_nvm, bq27xxx_dt_to_nvm, bool, 0444);
815 MODULE_PARM_DESC(dt_monitored_battery_updates_nvm,
816 "Devicetree monitored-battery config updates data memory on NVM/flash chips.\n"
817 "Users must set this =0 when installing a different type of battery!\n"
819 #ifndef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
820 "\nSetting this affects future kernel updates, not the current configuration."
824 static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
826 struct bq27xxx_device_info *di;
827 unsigned int prev_val = *(unsigned int *) kp->arg;
830 ret = param_set_uint(val, kp);
831 if (ret < 0 || prev_val == *(unsigned int *) kp->arg)
834 mutex_lock(&bq27xxx_list_lock);
835 list_for_each_entry(di, &bq27xxx_battery_devices, list)
836 mod_delayed_work(system_wq, &di->work, 0);
837 mutex_unlock(&bq27xxx_list_lock);
842 static const struct kernel_param_ops param_ops_poll_interval = {
843 .get = param_get_uint,
844 .set = poll_interval_param_set,
847 static unsigned int poll_interval = 360;
848 module_param_cb(poll_interval, ¶m_ops_poll_interval, &poll_interval, 0644);
849 MODULE_PARM_DESC(poll_interval,
850 "battery poll interval in seconds - 0 disables polling");
853 * Common code for BQ27xxx devices
856 static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index,
861 if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
864 ret = di->bus.read(di, di->regs[reg_index], single);
866 dev_dbg(di->dev, "failed to read register 0x%02x (index %d)\n",
867 di->regs[reg_index], reg_index);
872 static inline int bq27xxx_write(struct bq27xxx_device_info *di, int reg_index,
873 u16 value, bool single)
877 if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
883 ret = di->bus.write(di, di->regs[reg_index], value, single);
885 dev_dbg(di->dev, "failed to write register 0x%02x (index %d)\n",
886 di->regs[reg_index], reg_index);
891 static inline int bq27xxx_read_block(struct bq27xxx_device_info *di, int reg_index,
896 if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
899 if (!di->bus.read_bulk)
902 ret = di->bus.read_bulk(di, di->regs[reg_index], data, len);
904 dev_dbg(di->dev, "failed to read_bulk register 0x%02x (index %d)\n",
905 di->regs[reg_index], reg_index);
910 static inline int bq27xxx_write_block(struct bq27xxx_device_info *di, int reg_index,
915 if (!di || di->regs[reg_index] == INVALID_REG_ADDR)
918 if (!di->bus.write_bulk)
921 ret = di->bus.write_bulk(di, di->regs[reg_index], data, len);
923 dev_dbg(di->dev, "failed to write_bulk register 0x%02x (index %d)\n",
924 di->regs[reg_index], reg_index);
929 static int bq27xxx_battery_seal(struct bq27xxx_device_info *di)
933 ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_SEALED, false);
935 dev_err(di->dev, "bus error on seal: %d\n", ret);
942 static int bq27xxx_battery_unseal(struct bq27xxx_device_info *di)
946 if (di->unseal_key == 0) {
947 dev_err(di->dev, "unseal failed due to missing key\n");
951 ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)(di->unseal_key >> 16), false);
955 ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, (u16)di->unseal_key, false);
962 dev_err(di->dev, "bus error on unseal: %d\n", ret);
966 static u8 bq27xxx_battery_checksum_dm_block(struct bq27xxx_dm_buf *buf)
971 for (i = 0; i < BQ27XXX_DM_SZ; i++)
978 static int bq27xxx_battery_read_dm_block(struct bq27xxx_device_info *di,
979 struct bq27xxx_dm_buf *buf)
983 buf->has_data = false;
985 ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
989 ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
995 ret = bq27xxx_read_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
999 ret = bq27xxx_read(di, BQ27XXX_DM_CKSUM, true);
1003 if ((u8)ret != bq27xxx_battery_checksum_dm_block(buf)) {
1008 buf->has_data = true;
1014 dev_err(di->dev, "bus error reading chip memory: %d\n", ret);
1018 static void bq27xxx_battery_update_dm_block(struct bq27xxx_device_info *di,
1019 struct bq27xxx_dm_buf *buf,
1020 enum bq27xxx_dm_reg_id reg_id,
1023 struct bq27xxx_dm_reg *reg = &di->dm_regs[reg_id];
1024 const char *str = bq27xxx_dm_reg_name[reg_id];
1025 u16 *prev = bq27xxx_dm_reg_ptr(buf, reg);
1028 dev_warn(di->dev, "buffer does not match %s dm spec\n", str);
1032 if (reg->bytes != 2) {
1033 dev_warn(di->dev, "%s dm spec has unsupported byte size\n", str);
1040 if (be16_to_cpup(prev) == val) {
1041 dev_info(di->dev, "%s has %u\n", str, val);
1045 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1046 if (!(di->opts & BQ27XXX_O_RAM) && !bq27xxx_dt_to_nvm) {
1048 if (!(di->opts & BQ27XXX_O_RAM)) {
1050 /* devicetree and NVM differ; defer to NVM */
1051 dev_warn(di->dev, "%s has %u; update to %u disallowed "
1052 #ifdef CONFIG_BATTERY_BQ27XXX_DT_UPDATES_NVM
1053 "by dt_monitored_battery_updates_nvm=0"
1055 "for flash/NVM data memory"
1057 "\n", str, be16_to_cpup(prev), val);
1061 dev_info(di->dev, "update %s to %u\n", str, val);
1063 *prev = cpu_to_be16(val);
1067 static int bq27xxx_battery_cfgupdate_priv(struct bq27xxx_device_info *di, bool active)
1069 const int limit = 100;
1070 u16 cmd = active ? BQ27XXX_SET_CFGUPDATE : BQ27XXX_SOFT_RESET;
1071 int ret, try = limit;
1073 ret = bq27xxx_write(di, BQ27XXX_REG_CTRL, cmd, false);
1079 ret = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false);
1082 } while (!!(ret & BQ27XXX_FLAG_CFGUP) != active && --try);
1084 if (!try && di->chip != BQ27425) { // 425 has a bug
1085 dev_err(di->dev, "timed out waiting for cfgupdate flag %d\n", active);
1089 if (limit - try > 3)
1090 dev_warn(di->dev, "cfgupdate %d, retries %d\n", active, limit - try);
1095 static inline int bq27xxx_battery_set_cfgupdate(struct bq27xxx_device_info *di)
1097 int ret = bq27xxx_battery_cfgupdate_priv(di, true);
1098 if (ret < 0 && ret != -EINVAL)
1099 dev_err(di->dev, "bus error on set_cfgupdate: %d\n", ret);
1104 static inline int bq27xxx_battery_soft_reset(struct bq27xxx_device_info *di)
1106 int ret = bq27xxx_battery_cfgupdate_priv(di, false);
1107 if (ret < 0 && ret != -EINVAL)
1108 dev_err(di->dev, "bus error on soft_reset: %d\n", ret);
1113 static int bq27xxx_battery_write_dm_block(struct bq27xxx_device_info *di,
1114 struct bq27xxx_dm_buf *buf)
1116 bool cfgup = di->opts & BQ27XXX_O_CFGUP;
1123 ret = bq27xxx_battery_set_cfgupdate(di);
1128 ret = bq27xxx_write(di, BQ27XXX_DM_CTRL, 0, true);
1132 ret = bq27xxx_write(di, BQ27XXX_DM_CLASS, buf->class, true);
1136 ret = bq27xxx_write(di, BQ27XXX_DM_BLOCK, buf->block, true);
1142 ret = bq27xxx_write_block(di, BQ27XXX_DM_DATA, buf->data, BQ27XXX_DM_SZ);
1146 ret = bq27xxx_write(di, BQ27XXX_DM_CKSUM,
1147 bq27xxx_battery_checksum_dm_block(buf), true);
1151 /* DO NOT read BQ27XXX_DM_CKSUM here to verify it! That may cause NVM
1152 * corruption on the '425 chip (and perhaps others), which can damage
1158 ret = bq27xxx_battery_soft_reset(di);
1162 BQ27XXX_MSLEEP(100); /* flash DM updates in <100ms */
1171 bq27xxx_battery_soft_reset(di);
1173 dev_err(di->dev, "bus error writing chip memory: %d\n", ret);
1177 static void bq27xxx_battery_set_config(struct bq27xxx_device_info *di,
1178 struct power_supply_battery_info *info)
1180 struct bq27xxx_dm_buf bd = BQ27XXX_DM_BUF(di, BQ27XXX_DM_DESIGN_CAPACITY);
1181 struct bq27xxx_dm_buf bt = BQ27XXX_DM_BUF(di, BQ27XXX_DM_TERMINATE_VOLTAGE);
1184 if (bq27xxx_battery_unseal(di) < 0)
1187 if (info->charge_full_design_uah != -EINVAL &&
1188 info->energy_full_design_uwh != -EINVAL) {
1189 bq27xxx_battery_read_dm_block(di, &bd);
1190 /* assume design energy & capacity are in same block */
1191 bq27xxx_battery_update_dm_block(di, &bd,
1192 BQ27XXX_DM_DESIGN_CAPACITY,
1193 info->charge_full_design_uah / 1000);
1194 bq27xxx_battery_update_dm_block(di, &bd,
1195 BQ27XXX_DM_DESIGN_ENERGY,
1196 info->energy_full_design_uwh / 1000);
1199 if (info->voltage_min_design_uv != -EINVAL) {
1200 bool same = bd.class == bt.class && bd.block == bt.block;
1202 bq27xxx_battery_read_dm_block(di, &bt);
1203 bq27xxx_battery_update_dm_block(di, same ? &bd : &bt,
1204 BQ27XXX_DM_TERMINATE_VOLTAGE,
1205 info->voltage_min_design_uv / 1000);
1208 updated = bd.dirty || bt.dirty;
1210 bq27xxx_battery_write_dm_block(di, &bd);
1211 bq27xxx_battery_write_dm_block(di, &bt);
1213 bq27xxx_battery_seal(di);
1215 if (updated && !(di->opts & BQ27XXX_O_CFGUP)) {
1216 bq27xxx_write(di, BQ27XXX_REG_CTRL, BQ27XXX_RESET, false);
1217 BQ27XXX_MSLEEP(300); /* reset time is not documented */
1219 /* assume bq27xxx_battery_update() is called hereafter */
1222 static void bq27xxx_battery_settings(struct bq27xxx_device_info *di)
1224 struct power_supply_battery_info info = {};
1225 unsigned int min, max;
1227 if (power_supply_get_battery_info(di->bat, &info) < 0)
1231 dev_warn(di->dev, "data memory update not supported for chip\n");
1235 if (info.energy_full_design_uwh != info.charge_full_design_uah) {
1236 if (info.energy_full_design_uwh == -EINVAL)
1237 dev_warn(di->dev, "missing battery:energy-full-design-microwatt-hours\n");
1238 else if (info.charge_full_design_uah == -EINVAL)
1239 dev_warn(di->dev, "missing battery:charge-full-design-microamp-hours\n");
1242 /* assume min == 0 */
1243 max = di->dm_regs[BQ27XXX_DM_DESIGN_ENERGY].max;
1244 if (info.energy_full_design_uwh > max * 1000) {
1245 dev_err(di->dev, "invalid battery:energy-full-design-microwatt-hours %d\n",
1246 info.energy_full_design_uwh);
1247 info.energy_full_design_uwh = -EINVAL;
1250 /* assume min == 0 */
1251 max = di->dm_regs[BQ27XXX_DM_DESIGN_CAPACITY].max;
1252 if (info.charge_full_design_uah > max * 1000) {
1253 dev_err(di->dev, "invalid battery:charge-full-design-microamp-hours %d\n",
1254 info.charge_full_design_uah);
1255 info.charge_full_design_uah = -EINVAL;
1258 min = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].min;
1259 max = di->dm_regs[BQ27XXX_DM_TERMINATE_VOLTAGE].max;
1260 if ((info.voltage_min_design_uv < min * 1000 ||
1261 info.voltage_min_design_uv > max * 1000) &&
1262 info.voltage_min_design_uv != -EINVAL) {
1263 dev_err(di->dev, "invalid battery:voltage-min-design-microvolt %d\n",
1264 info.voltage_min_design_uv);
1265 info.voltage_min_design_uv = -EINVAL;
1268 if ((info.energy_full_design_uwh != -EINVAL &&
1269 info.charge_full_design_uah != -EINVAL) ||
1270 info.voltage_min_design_uv != -EINVAL)
1271 bq27xxx_battery_set_config(di, &info);
1275 * Return the battery State-of-Charge
1276 * Or < 0 if something fails.
1278 static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
1282 if (di->opts & BQ27XXX_O_ZERO)
1283 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true);
1285 soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false);
1288 dev_dbg(di->dev, "error reading State-of-Charge\n");
1294 * Return a battery charge value in µAh
1295 * Or < 0 if something fails.
1297 static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
1301 charge = bq27xxx_read(di, reg, false);
1303 dev_dbg(di->dev, "error reading charge register %02x: %d\n",
1308 if (di->opts & BQ27XXX_O_ZERO)
1309 charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1317 * Return the battery Nominal available capacity in µAh
1318 * Or < 0 if something fails.
1320 static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
1324 if (di->opts & BQ27XXX_O_ZERO) {
1325 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1326 if (flags >= 0 && (flags & BQ27000_FLAG_CI))
1330 return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
1334 * Return the battery Full Charge Capacity in µAh
1335 * Or < 0 if something fails.
1337 static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
1339 return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
1343 * Return the Design Capacity in µAh
1344 * Or < 0 if something fails.
1346 static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di)
1350 if (di->opts & BQ27XXX_O_ZERO)
1351 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true);
1353 dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false);
1356 dev_dbg(di->dev, "error reading initial last measured discharge\n");
1360 if (di->opts & BQ27XXX_O_ZERO)
1361 dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1369 * Return the battery Available energy in µWh
1370 * Or < 0 if something fails.
1372 static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
1376 ae = bq27xxx_read(di, BQ27XXX_REG_AE, false);
1378 dev_dbg(di->dev, "error reading available energy\n");
1382 if (di->opts & BQ27XXX_O_ZERO)
1383 ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS;
1391 * Return the battery temperature in tenths of degree Kelvin
1392 * Or < 0 if something fails.
1394 static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
1398 temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false);
1400 dev_err(di->dev, "error reading temperature\n");
1404 if (di->opts & BQ27XXX_O_ZERO)
1405 temp = 5 * temp / 2;
1411 * Return the battery Cycle count total
1412 * Or < 0 if something fails.
1414 static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
1418 cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false);
1420 dev_err(di->dev, "error reading cycle count total\n");
1426 * Read a time register.
1427 * Return < 0 if something fails.
1429 static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
1433 tval = bq27xxx_read(di, reg, false);
1435 dev_dbg(di->dev, "error reading time register %02x: %d\n",
1447 * Returns true if a battery over temperature condition is detected
1449 static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags)
1451 if (di->opts & BQ27XXX_O_OTDC)
1452 return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD);
1453 if (di->opts & BQ27XXX_O_UTOT)
1454 return flags & BQ27XXX_FLAG_OT;
1460 * Returns true if a battery under temperature condition is detected
1462 static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags)
1464 if (di->opts & BQ27XXX_O_UTOT)
1465 return flags & BQ27XXX_FLAG_UT;
1471 * Returns true if a low state of charge condition is detected
1473 static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
1475 if (di->opts & BQ27XXX_O_ZERO)
1476 return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF);
1478 return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
1482 * Read flag register.
1483 * Return < 0 if something fails.
1485 static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
1488 bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1490 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1492 dev_err(di->dev, "error reading flag register:%d\n", flags);
1496 /* Unlikely but important to return first */
1497 if (unlikely(bq27xxx_battery_overtemp(di, flags)))
1498 return POWER_SUPPLY_HEALTH_OVERHEAT;
1499 if (unlikely(bq27xxx_battery_undertemp(di, flags)))
1500 return POWER_SUPPLY_HEALTH_COLD;
1501 if (unlikely(bq27xxx_battery_dead(di, flags)))
1502 return POWER_SUPPLY_HEALTH_DEAD;
1504 return POWER_SUPPLY_HEALTH_GOOD;
1507 static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di)
1509 struct bq27xxx_reg_cache cache = {0, };
1510 bool has_ci_flag = di->opts & BQ27XXX_O_ZERO;
1511 bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
1513 cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
1514 if ((cache.flags & 0xff) == 0xff)
1515 cache.flags = -1; /* read error */
1516 if (cache.flags >= 0) {
1517 cache.temperature = bq27xxx_battery_read_temperature(di);
1518 if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
1519 dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
1520 cache.capacity = -ENODATA;
1521 cache.energy = -ENODATA;
1522 cache.time_to_empty = -ENODATA;
1523 cache.time_to_empty_avg = -ENODATA;
1524 cache.time_to_full = -ENODATA;
1525 cache.charge_full = -ENODATA;
1526 cache.health = -ENODATA;
1528 if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
1529 cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
1530 if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
1531 cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
1532 if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
1533 cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
1534 cache.charge_full = bq27xxx_battery_read_fcc(di);
1535 cache.capacity = bq27xxx_battery_read_soc(di);
1536 if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
1537 cache.energy = bq27xxx_battery_read_energy(di);
1538 cache.health = bq27xxx_battery_read_health(di);
1540 if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
1541 cache.cycle_count = bq27xxx_battery_read_cyct(di);
1543 /* We only have to read charge design full once */
1544 if (di->charge_design_full <= 0)
1545 di->charge_design_full = bq27xxx_battery_read_dcap(di);
1548 if (di->cache.capacity != cache.capacity)
1549 power_supply_changed(di->bat);
1551 if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
1554 di->last_update = jiffies;
1556 if (!di->removed && poll_interval > 0)
1557 mod_delayed_work(system_wq, &di->work, poll_interval * HZ);
1560 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
1562 mutex_lock(&di->lock);
1563 bq27xxx_battery_update_unlocked(di);
1564 mutex_unlock(&di->lock);
1566 EXPORT_SYMBOL_GPL(bq27xxx_battery_update);
1568 static void bq27xxx_battery_poll(struct work_struct *work)
1570 struct bq27xxx_device_info *di =
1571 container_of(work, struct bq27xxx_device_info,
1574 bq27xxx_battery_update(di);
1578 * Return the battery average current in µA
1579 * Note that current can be negative signed as well
1580 * Or 0 if something fails.
1582 static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
1583 union power_supply_propval *val)
1588 curr = bq27xxx_read(di, BQ27XXX_REG_AI, false);
1590 dev_err(di->dev, "error reading current\n");
1594 if (di->opts & BQ27XXX_O_ZERO) {
1595 flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
1596 if (flags & BQ27000_FLAG_CHGS) {
1597 dev_dbg(di->dev, "negative current!\n");
1601 val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
1603 /* Other gauges return signed value */
1604 val->intval = (int)((s16)curr) * 1000;
1611 * Get the average power in µW
1612 * Return < 0 if something fails.
1614 static int bq27xxx_battery_pwr_avg(struct bq27xxx_device_info *di,
1615 union power_supply_propval *val)
1619 power = bq27xxx_read(di, BQ27XXX_REG_AP, false);
1622 "error reading average power register %02x: %d\n",
1623 BQ27XXX_REG_AP, power);
1627 if (di->opts & BQ27XXX_O_ZERO)
1628 val->intval = (power * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS;
1630 /* Other gauges return a signed value in units of 10mW */
1631 val->intval = (int)((s16)power) * 10000;
1636 static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
1637 union power_supply_propval *val)
1641 if (di->opts & BQ27XXX_O_ZERO) {
1642 if (di->cache.flags & BQ27000_FLAG_FC)
1643 status = POWER_SUPPLY_STATUS_FULL;
1644 else if (di->cache.flags & BQ27000_FLAG_CHGS)
1645 status = POWER_SUPPLY_STATUS_CHARGING;
1646 else if (power_supply_am_i_supplied(di->bat))
1647 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1649 status = POWER_SUPPLY_STATUS_DISCHARGING;
1651 if (di->cache.flags & BQ27XXX_FLAG_FC)
1652 status = POWER_SUPPLY_STATUS_FULL;
1653 else if (di->cache.flags & BQ27XXX_FLAG_DSC)
1654 status = POWER_SUPPLY_STATUS_DISCHARGING;
1656 status = POWER_SUPPLY_STATUS_CHARGING;
1659 val->intval = status;
1664 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
1665 union power_supply_propval *val)
1669 if (di->opts & BQ27XXX_O_ZERO) {
1670 if (di->cache.flags & BQ27000_FLAG_FC)
1671 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1672 else if (di->cache.flags & BQ27000_FLAG_EDV1)
1673 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1674 else if (di->cache.flags & BQ27000_FLAG_EDVF)
1675 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1677 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1679 if (di->cache.flags & BQ27XXX_FLAG_FC)
1680 level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1681 else if (di->cache.flags & BQ27XXX_FLAG_SOC1)
1682 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1683 else if (di->cache.flags & BQ27XXX_FLAG_SOCF)
1684 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1686 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1689 val->intval = level;
1695 * Return the battery Voltage in millivolts
1696 * Or < 0 if something fails.
1698 static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di,
1699 union power_supply_propval *val)
1703 volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false);
1705 dev_err(di->dev, "error reading voltage\n");
1709 val->intval = volt * 1000;
1714 static int bq27xxx_simple_value(int value,
1715 union power_supply_propval *val)
1720 val->intval = value;
1725 static int bq27xxx_battery_get_property(struct power_supply *psy,
1726 enum power_supply_property psp,
1727 union power_supply_propval *val)
1730 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1732 mutex_lock(&di->lock);
1733 if (time_is_before_jiffies(di->last_update + 5 * HZ))
1734 bq27xxx_battery_update_unlocked(di);
1735 mutex_unlock(&di->lock);
1737 if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
1741 case POWER_SUPPLY_PROP_STATUS:
1742 ret = bq27xxx_battery_status(di, val);
1744 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1745 ret = bq27xxx_battery_voltage(di, val);
1747 case POWER_SUPPLY_PROP_PRESENT:
1748 val->intval = di->cache.flags < 0 ? 0 : 1;
1750 case POWER_SUPPLY_PROP_CURRENT_NOW:
1751 ret = bq27xxx_battery_current(di, val);
1753 case POWER_SUPPLY_PROP_CAPACITY:
1754 ret = bq27xxx_simple_value(di->cache.capacity, val);
1756 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1757 ret = bq27xxx_battery_capacity_level(di, val);
1759 case POWER_SUPPLY_PROP_TEMP:
1760 ret = bq27xxx_simple_value(di->cache.temperature, val);
1762 val->intval -= 2731; /* convert decidegree k to c */
1764 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
1765 ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
1767 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
1768 ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
1770 case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
1771 ret = bq27xxx_simple_value(di->cache.time_to_full, val);
1773 case POWER_SUPPLY_PROP_TECHNOLOGY:
1774 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
1776 case POWER_SUPPLY_PROP_CHARGE_NOW:
1777 ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
1779 case POWER_SUPPLY_PROP_CHARGE_FULL:
1780 ret = bq27xxx_simple_value(di->cache.charge_full, val);
1782 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
1783 ret = bq27xxx_simple_value(di->charge_design_full, val);
1786 * TODO: Implement these to make registers set from
1787 * power_supply_battery_info visible in sysfs.
1789 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
1790 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
1792 case POWER_SUPPLY_PROP_CYCLE_COUNT:
1793 ret = bq27xxx_simple_value(di->cache.cycle_count, val);
1795 case POWER_SUPPLY_PROP_ENERGY_NOW:
1796 ret = bq27xxx_simple_value(di->cache.energy, val);
1798 case POWER_SUPPLY_PROP_POWER_AVG:
1799 ret = bq27xxx_battery_pwr_avg(di, val);
1801 case POWER_SUPPLY_PROP_HEALTH:
1802 ret = bq27xxx_simple_value(di->cache.health, val);
1804 case POWER_SUPPLY_PROP_MANUFACTURER:
1805 val->strval = BQ27XXX_MANUFACTURER;
1814 static void bq27xxx_external_power_changed(struct power_supply *psy)
1816 struct bq27xxx_device_info *di = power_supply_get_drvdata(psy);
1818 /* After charger plug in/out wait 0.5s for things to stabilize */
1819 mod_delayed_work(system_wq, &di->work, HZ / 2);
1822 int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
1824 struct power_supply_desc *psy_desc;
1825 struct power_supply_config psy_cfg = {
1826 .of_node = di->dev->of_node,
1830 INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll);
1831 mutex_init(&di->lock);
1833 di->regs = bq27xxx_chip_data[di->chip].regs;
1834 di->unseal_key = bq27xxx_chip_data[di->chip].unseal_key;
1835 di->dm_regs = bq27xxx_chip_data[di->chip].dm_regs;
1836 di->opts = bq27xxx_chip_data[di->chip].opts;
1838 psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
1842 psy_desc->name = di->name;
1843 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1844 psy_desc->properties = bq27xxx_chip_data[di->chip].props;
1845 psy_desc->num_properties = bq27xxx_chip_data[di->chip].props_size;
1846 psy_desc->get_property = bq27xxx_battery_get_property;
1847 psy_desc->external_power_changed = bq27xxx_external_power_changed;
1849 di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
1850 if (IS_ERR(di->bat)) {
1851 if (PTR_ERR(di->bat) == -EPROBE_DEFER)
1852 dev_dbg(di->dev, "failed to register battery, deferring probe\n");
1854 dev_err(di->dev, "failed to register battery\n");
1855 return PTR_ERR(di->bat);
1858 bq27xxx_battery_settings(di);
1859 bq27xxx_battery_update(di);
1861 mutex_lock(&bq27xxx_list_lock);
1862 list_add(&di->list, &bq27xxx_battery_devices);
1863 mutex_unlock(&bq27xxx_list_lock);
1867 EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
1869 void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
1871 mutex_lock(&bq27xxx_list_lock);
1872 list_del(&di->list);
1873 mutex_unlock(&bq27xxx_list_lock);
1875 /* Set removed to avoid bq27xxx_battery_update() re-queuing the work */
1876 mutex_lock(&di->lock);
1878 mutex_unlock(&di->lock);
1880 cancel_delayed_work_sync(&di->work);
1882 power_supply_unregister(di->bat);
1883 mutex_destroy(&di->lock);
1885 EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
1887 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
1888 MODULE_DESCRIPTION("BQ27xxx battery monitor driver");
1889 MODULE_LICENSE("GPL");