Commit | Line | Data |
---|---|---|
b996ad0e | 1 | /* |
081bab21 | 2 | * BQ27xxx battery driver |
b996ad0e RG |
3 | * |
4 | * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> | |
5 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> | |
7fb7ba58 | 6 | * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de> |
73c244a8 | 7 | * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com> |
b996ad0e RG |
8 | * |
9 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. | |
10 | * | |
11 | * This package is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | * | |
631c17ee | 19 | * Datasheets: |
d74534c2 AD |
20 | * http://www.ti.com/product/bq27000 |
21 | * http://www.ti.com/product/bq27200 | |
22 | * http://www.ti.com/product/bq27010 | |
23 | * http://www.ti.com/product/bq27210 | |
24 | * http://www.ti.com/product/bq27500 | |
25 | * http://www.ti.com/product/bq27510-g3 | |
26 | * http://www.ti.com/product/bq27520-g4 | |
27 | * http://www.ti.com/product/bq27530-g1 | |
28 | * http://www.ti.com/product/bq27531-g1 | |
29 | * http://www.ti.com/product/bq27541-g1 | |
30 | * http://www.ti.com/product/bq27542-g1 | |
31 | * http://www.ti.com/product/bq27546-g1 | |
32 | * http://www.ti.com/product/bq27742-g1 | |
33 | * http://www.ti.com/product/bq27545-g1 | |
34 | * http://www.ti.com/product/bq27421-g1 | |
a66f59ba | 35 | * http://www.ti.com/product/bq27425-g1 |
d74534c2 AD |
36 | * http://www.ti.com/product/bq27411-g1 |
37 | * http://www.ti.com/product/bq27621-g1 | |
631c17ee PR |
38 | */ |
39 | ||
1cb82fdb | 40 | #include <linux/device.h> |
b996ad0e | 41 | #include <linux/module.h> |
1d72706f | 42 | #include <linux/mutex.h> |
b996ad0e RG |
43 | #include <linux/param.h> |
44 | #include <linux/jiffies.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/delay.h> | |
47 | #include <linux/platform_device.h> | |
48 | #include <linux/power_supply.h> | |
5a0e3ad6 | 49 | #include <linux/slab.h> |
7df3a746 | 50 | #include <linux/of.h> |
b996ad0e | 51 | |
081bab21 | 52 | #include <linux/power/bq27xxx_battery.h> |
7fb7ba58 | 53 | |
6eb207f2 | 54 | #define DRIVER_VERSION "1.2.0" |
b996ad0e | 55 | |
db04fc5c AD |
56 | #define BQ27XXX_MANUFACTURER "Texas Instruments" |
57 | ||
d74534c2 AD |
58 | /* BQ27XXX Flags */ |
59 | #define BQ27XXX_FLAG_DSC BIT(0) | |
60 | #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ | |
61 | #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
62 | #define BQ27XXX_FLAG_FC BIT(9) | |
63 | #define BQ27XXX_FLAG_OTD BIT(14) | |
64 | #define BQ27XXX_FLAG_OTC BIT(15) | |
74aab849 AD |
65 | #define BQ27XXX_FLAG_UT BIT(14) |
66 | #define BQ27XXX_FLAG_OT BIT(15) | |
d74534c2 AD |
67 | |
68 | /* BQ27000 has different layout for Flags register */ | |
6eb207f2 AD |
69 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
70 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
71 | #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ | |
72 | #define BQ27000_FLAG_FC BIT(5) | |
73 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ | |
74 | ||
d74534c2 AD |
75 | #define BQ27XXX_RS (20) /* Resistor sense mOhm */ |
76 | #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */ | |
77 | #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */ | |
a2e5118c | 78 | |
d74534c2 AD |
79 | #define INVALID_REG_ADDR 0xff |
80 | ||
81 | /* | |
82 | * bq27xxx_reg_index - Register names | |
83 | * | |
84 | * These are indexes into a device's register mapping array. | |
85 | */ | |
2e05b518 | 86 | |
d74534c2 AD |
87 | enum bq27xxx_reg_index { |
88 | BQ27XXX_REG_CTRL = 0, /* Control */ | |
89 | BQ27XXX_REG_TEMP, /* Temperature */ | |
90 | BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ | |
91 | BQ27XXX_REG_VOLT, /* Voltage */ | |
92 | BQ27XXX_REG_AI, /* Average Current */ | |
93 | BQ27XXX_REG_FLAGS, /* Flags */ | |
94 | BQ27XXX_REG_TTE, /* Time-to-Empty */ | |
95 | BQ27XXX_REG_TTF, /* Time-to-Full */ | |
96 | BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ | |
97 | BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ | |
98 | BQ27XXX_REG_NAC, /* Nominal Available Capacity */ | |
99 | BQ27XXX_REG_FCC, /* Full Charge Capacity */ | |
100 | BQ27XXX_REG_CYCT, /* Cycle Count */ | |
101 | BQ27XXX_REG_AE, /* Available Energy */ | |
102 | BQ27XXX_REG_SOC, /* State-of-Charge */ | |
103 | BQ27XXX_REG_DCAP, /* Design Capacity */ | |
104 | BQ27XXX_REG_AP, /* Average Power */ | |
2e05b518 | 105 | BQ27XXX_REG_MAX, /* sentinel */ |
d74534c2 AD |
106 | }; |
107 | ||
d74534c2 | 108 | /* Register mappings */ |
2e05b518 AD |
109 | static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = { |
110 | [BQ27000] = { | |
111 | [BQ27XXX_REG_CTRL] = 0x00, | |
112 | [BQ27XXX_REG_TEMP] = 0x06, | |
113 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
114 | [BQ27XXX_REG_VOLT] = 0x08, | |
115 | [BQ27XXX_REG_AI] = 0x14, | |
116 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
117 | [BQ27XXX_REG_TTE] = 0x16, | |
118 | [BQ27XXX_REG_TTF] = 0x18, | |
119 | [BQ27XXX_REG_TTES] = 0x1c, | |
120 | [BQ27XXX_REG_TTECP] = 0x26, | |
121 | [BQ27XXX_REG_NAC] = 0x0c, | |
122 | [BQ27XXX_REG_FCC] = 0x12, | |
123 | [BQ27XXX_REG_CYCT] = 0x2a, | |
124 | [BQ27XXX_REG_AE] = 0x22, | |
125 | [BQ27XXX_REG_SOC] = 0x0b, | |
126 | [BQ27XXX_REG_DCAP] = 0x76, | |
127 | [BQ27XXX_REG_AP] = 0x24, | |
128 | }, | |
129 | [BQ27010] = { | |
130 | [BQ27XXX_REG_CTRL] = 0x00, | |
131 | [BQ27XXX_REG_TEMP] = 0x06, | |
132 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
133 | [BQ27XXX_REG_VOLT] = 0x08, | |
134 | [BQ27XXX_REG_AI] = 0x14, | |
135 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
136 | [BQ27XXX_REG_TTE] = 0x16, | |
137 | [BQ27XXX_REG_TTF] = 0x18, | |
138 | [BQ27XXX_REG_TTES] = 0x1c, | |
139 | [BQ27XXX_REG_TTECP] = 0x26, | |
140 | [BQ27XXX_REG_NAC] = 0x0c, | |
141 | [BQ27XXX_REG_FCC] = 0x12, | |
142 | [BQ27XXX_REG_CYCT] = 0x2a, | |
143 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
144 | [BQ27XXX_REG_SOC] = 0x0b, | |
145 | [BQ27XXX_REG_DCAP] = 0x76, | |
146 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
147 | }, | |
818e3012 | 148 | [BQ2750X] = { |
2e05b518 AD |
149 | [BQ27XXX_REG_CTRL] = 0x00, |
150 | [BQ27XXX_REG_TEMP] = 0x06, | |
151 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
152 | [BQ27XXX_REG_VOLT] = 0x08, | |
153 | [BQ27XXX_REG_AI] = 0x14, | |
154 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
155 | [BQ27XXX_REG_TTE] = 0x16, | |
156 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
157 | [BQ27XXX_REG_TTES] = 0x1a, | |
158 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
159 | [BQ27XXX_REG_NAC] = 0x0c, | |
160 | [BQ27XXX_REG_FCC] = 0x12, | |
161 | [BQ27XXX_REG_CYCT] = 0x2a, | |
162 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
163 | [BQ27XXX_REG_SOC] = 0x2c, | |
164 | [BQ27XXX_REG_DCAP] = 0x3c, | |
165 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
166 | }, | |
6da6e4bd | 167 | [BQ2751X] = { |
3bee9ea1 AD |
168 | [BQ27XXX_REG_CTRL] = 0x00, |
169 | [BQ27XXX_REG_TEMP] = 0x06, | |
170 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
171 | [BQ27XXX_REG_VOLT] = 0x08, | |
172 | [BQ27XXX_REG_AI] = 0x14, | |
173 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
174 | [BQ27XXX_REG_TTE] = 0x16, | |
175 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
176 | [BQ27XXX_REG_TTES] = 0x1a, | |
177 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
178 | [BQ27XXX_REG_NAC] = 0x0c, | |
179 | [BQ27XXX_REG_FCC] = 0x12, | |
180 | [BQ27XXX_REG_CYCT] = 0x1e, | |
181 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
182 | [BQ27XXX_REG_SOC] = 0x20, | |
183 | [BQ27XXX_REG_DCAP] = 0x2e, | |
184 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
185 | }, | |
2e05b518 AD |
186 | [BQ27530] = { |
187 | [BQ27XXX_REG_CTRL] = 0x00, | |
188 | [BQ27XXX_REG_TEMP] = 0x06, | |
189 | [BQ27XXX_REG_INT_TEMP] = 0x32, | |
190 | [BQ27XXX_REG_VOLT] = 0x08, | |
191 | [BQ27XXX_REG_AI] = 0x14, | |
192 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
193 | [BQ27XXX_REG_TTE] = 0x16, | |
194 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
195 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
196 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
197 | [BQ27XXX_REG_NAC] = 0x0c, | |
198 | [BQ27XXX_REG_FCC] = 0x12, | |
199 | [BQ27XXX_REG_CYCT] = 0x2a, | |
200 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
201 | [BQ27XXX_REG_SOC] = 0x2c, | |
202 | [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, | |
203 | [BQ27XXX_REG_AP] = 0x24, | |
204 | }, | |
205 | [BQ27541] = { | |
206 | [BQ27XXX_REG_CTRL] = 0x00, | |
207 | [BQ27XXX_REG_TEMP] = 0x06, | |
208 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
209 | [BQ27XXX_REG_VOLT] = 0x08, | |
210 | [BQ27XXX_REG_AI] = 0x14, | |
211 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
212 | [BQ27XXX_REG_TTE] = 0x16, | |
213 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
214 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
215 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
216 | [BQ27XXX_REG_NAC] = 0x0c, | |
217 | [BQ27XXX_REG_FCC] = 0x12, | |
218 | [BQ27XXX_REG_CYCT] = 0x2a, | |
219 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
220 | [BQ27XXX_REG_SOC] = 0x2c, | |
221 | [BQ27XXX_REG_DCAP] = 0x3c, | |
222 | [BQ27XXX_REG_AP] = 0x24, | |
223 | }, | |
224 | [BQ27545] = { | |
225 | [BQ27XXX_REG_CTRL] = 0x00, | |
226 | [BQ27XXX_REG_TEMP] = 0x06, | |
227 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
228 | [BQ27XXX_REG_VOLT] = 0x08, | |
229 | [BQ27XXX_REG_AI] = 0x14, | |
230 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
231 | [BQ27XXX_REG_TTE] = 0x16, | |
232 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
233 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
234 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
235 | [BQ27XXX_REG_NAC] = 0x0c, | |
236 | [BQ27XXX_REG_FCC] = 0x12, | |
237 | [BQ27XXX_REG_CYCT] = 0x2a, | |
238 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
239 | [BQ27XXX_REG_SOC] = 0x2c, | |
240 | [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, | |
241 | [BQ27XXX_REG_AP] = 0x24, | |
242 | }, | |
243 | [BQ27421] = { | |
244 | [BQ27XXX_REG_CTRL] = 0x00, | |
245 | [BQ27XXX_REG_TEMP] = 0x02, | |
246 | [BQ27XXX_REG_INT_TEMP] = 0x1e, | |
247 | [BQ27XXX_REG_VOLT] = 0x04, | |
248 | [BQ27XXX_REG_AI] = 0x10, | |
249 | [BQ27XXX_REG_FLAGS] = 0x06, | |
250 | [BQ27XXX_REG_TTE] = INVALID_REG_ADDR, | |
251 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
252 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
253 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
254 | [BQ27XXX_REG_NAC] = 0x08, | |
255 | [BQ27XXX_REG_FCC] = 0x0e, | |
256 | [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR, | |
257 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
258 | [BQ27XXX_REG_SOC] = 0x1c, | |
259 | [BQ27XXX_REG_DCAP] = 0x3c, | |
260 | [BQ27XXX_REG_AP] = 0x18, | |
261 | }, | |
d74534c2 AD |
262 | }; |
263 | ||
264 | static enum power_supply_property bq27000_battery_props[] = { | |
4e924a81 | 265 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
266 | POWER_SUPPLY_PROP_PRESENT, |
267 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
268 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
269 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 270 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 271 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
272 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
273 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
274 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 275 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
276 | POWER_SUPPLY_PROP_CHARGE_FULL, |
277 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
278 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 279 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 280 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
281 | POWER_SUPPLY_PROP_POWER_AVG, |
282 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 283 | POWER_SUPPLY_PROP_MANUFACTURER, |
b996ad0e RG |
284 | }; |
285 | ||
d74534c2 | 286 | static enum power_supply_property bq27010_battery_props[] = { |
a66f59ba SG |
287 | POWER_SUPPLY_PROP_STATUS, |
288 | POWER_SUPPLY_PROP_PRESENT, | |
289 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
290 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
291 | POWER_SUPPLY_PROP_CAPACITY, | |
292 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
293 | POWER_SUPPLY_PROP_TEMP, | |
d74534c2 AD |
294 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
295 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
296 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
a66f59ba SG |
297 | POWER_SUPPLY_PROP_TECHNOLOGY, |
298 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
299 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
300 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
d74534c2 AD |
301 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
302 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 303 | POWER_SUPPLY_PROP_MANUFACTURER, |
a66f59ba SG |
304 | }; |
305 | ||
818e3012 | 306 | static enum power_supply_property bq2750x_battery_props[] = { |
628ef02c PV |
307 | POWER_SUPPLY_PROP_STATUS, |
308 | POWER_SUPPLY_PROP_PRESENT, | |
309 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
310 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
311 | POWER_SUPPLY_PROP_CAPACITY, | |
312 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
313 | POWER_SUPPLY_PROP_TEMP, | |
314 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
315 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
316 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
317 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
318 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
319 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
d74534c2 AD |
320 | POWER_SUPPLY_PROP_HEALTH, |
321 | POWER_SUPPLY_PROP_MANUFACTURER, | |
322 | }; | |
323 | ||
6da6e4bd | 324 | static enum power_supply_property bq2751x_battery_props[] = { |
3bee9ea1 AD |
325 | POWER_SUPPLY_PROP_STATUS, |
326 | POWER_SUPPLY_PROP_PRESENT, | |
327 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
328 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
329 | POWER_SUPPLY_PROP_CAPACITY, | |
330 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
331 | POWER_SUPPLY_PROP_TEMP, | |
332 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
333 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
334 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
335 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
336 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
337 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
338 | POWER_SUPPLY_PROP_HEALTH, | |
339 | POWER_SUPPLY_PROP_MANUFACTURER, | |
340 | }; | |
341 | ||
d74534c2 AD |
342 | static enum power_supply_property bq27530_battery_props[] = { |
343 | POWER_SUPPLY_PROP_STATUS, | |
344 | POWER_SUPPLY_PROP_PRESENT, | |
345 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
346 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
347 | POWER_SUPPLY_PROP_CAPACITY, | |
348 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
349 | POWER_SUPPLY_PROP_TEMP, | |
350 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
351 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
352 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
353 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
628ef02c PV |
354 | POWER_SUPPLY_PROP_POWER_AVG, |
355 | POWER_SUPPLY_PROP_HEALTH, | |
d74534c2 | 356 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
db04fc5c | 357 | POWER_SUPPLY_PROP_MANUFACTURER, |
628ef02c PV |
358 | }; |
359 | ||
d74534c2 | 360 | static enum power_supply_property bq27541_battery_props[] = { |
f46bf82e AB |
361 | POWER_SUPPLY_PROP_STATUS, |
362 | POWER_SUPPLY_PROP_PRESENT, | |
363 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
364 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
365 | POWER_SUPPLY_PROP_CAPACITY, | |
366 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
367 | POWER_SUPPLY_PROP_TEMP, | |
368 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
369 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
370 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
371 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
372 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
373 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
374 | POWER_SUPPLY_PROP_POWER_AVG, | |
375 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 376 | POWER_SUPPLY_PROP_MANUFACTURER, |
f46bf82e AB |
377 | }; |
378 | ||
d74534c2 AD |
379 | static enum power_supply_property bq27545_battery_props[] = { |
380 | POWER_SUPPLY_PROP_STATUS, | |
381 | POWER_SUPPLY_PROP_PRESENT, | |
382 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
383 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
384 | POWER_SUPPLY_PROP_CAPACITY, | |
385 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
386 | POWER_SUPPLY_PROP_TEMP, | |
387 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
388 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
389 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
390 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
391 | POWER_SUPPLY_PROP_HEALTH, | |
392 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
393 | POWER_SUPPLY_PROP_POWER_AVG, | |
394 | POWER_SUPPLY_PROP_MANUFACTURER, | |
395 | }; | |
396 | ||
397 | static enum power_supply_property bq27421_battery_props[] = { | |
398 | POWER_SUPPLY_PROP_STATUS, | |
399 | POWER_SUPPLY_PROP_PRESENT, | |
400 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
401 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
402 | POWER_SUPPLY_PROP_CAPACITY, | |
403 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
404 | POWER_SUPPLY_PROP_TEMP, | |
405 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
406 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
407 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
408 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
409 | POWER_SUPPLY_PROP_MANUFACTURER, | |
410 | }; | |
411 | ||
412 | #define BQ27XXX_PROP(_id, _prop) \ | |
413 | [_id] = { \ | |
414 | .props = _prop, \ | |
415 | .size = ARRAY_SIZE(_prop), \ | |
416 | } | |
417 | ||
418 | static struct { | |
419 | enum power_supply_property *props; | |
420 | size_t size; | |
421 | } bq27xxx_battery_props[] = { | |
422 | BQ27XXX_PROP(BQ27000, bq27000_battery_props), | |
423 | BQ27XXX_PROP(BQ27010, bq27010_battery_props), | |
818e3012 | 424 | BQ27XXX_PROP(BQ2750X, bq2750x_battery_props), |
6da6e4bd | 425 | BQ27XXX_PROP(BQ2751X, bq2751x_battery_props), |
d74534c2 AD |
426 | BQ27XXX_PROP(BQ27530, bq27530_battery_props), |
427 | BQ27XXX_PROP(BQ27541, bq27541_battery_props), | |
428 | BQ27XXX_PROP(BQ27545, bq27545_battery_props), | |
429 | BQ27XXX_PROP(BQ27421, bq27421_battery_props), | |
430 | }; | |
431 | ||
1d72706f MR |
432 | static DEFINE_MUTEX(bq27xxx_list_lock); |
433 | static LIST_HEAD(bq27xxx_battery_devices); | |
434 | ||
435 | static int poll_interval_param_set(const char *val, const struct kernel_param *kp) | |
436 | { | |
437 | struct bq27xxx_device_info *di; | |
950b6c2d | 438 | unsigned int prev_val = *(unsigned int *) kp->arg; |
1d72706f MR |
439 | int ret; |
440 | ||
441 | ret = param_set_uint(val, kp); | |
950b6c2d | 442 | if (ret < 0 || prev_val == *(unsigned int *) kp->arg) |
1d72706f MR |
443 | return ret; |
444 | ||
445 | mutex_lock(&bq27xxx_list_lock); | |
446 | list_for_each_entry(di, &bq27xxx_battery_devices, list) { | |
447 | cancel_delayed_work_sync(&di->work); | |
448 | schedule_delayed_work(&di->work, 0); | |
449 | } | |
450 | mutex_unlock(&bq27xxx_list_lock); | |
451 | ||
452 | return ret; | |
453 | } | |
454 | ||
455 | static const struct kernel_param_ops param_ops_poll_interval = { | |
456 | .get = param_get_uint, | |
457 | .set = poll_interval_param_set, | |
458 | }; | |
459 | ||
740b755a | 460 | static unsigned int poll_interval = 360; |
1d72706f | 461 | module_param_cb(poll_interval, ¶m_ops_poll_interval, &poll_interval, 0644); |
6d0a1815 AD |
462 | MODULE_PARM_DESC(poll_interval, |
463 | "battery poll interval in seconds - 0 disables polling"); | |
740b755a | 464 | |
b996ad0e | 465 | /* |
081bab21 | 466 | * Common code for BQ27xxx devices |
b996ad0e RG |
467 | */ |
468 | ||
d74534c2 | 469 | static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, |
ce33edfa | 470 | bool single) |
b996ad0e | 471 | { |
d74534c2 AD |
472 | /* Reports EINVAL for invalid/missing registers */ |
473 | if (!di || di->regs[reg_index] == INVALID_REG_ADDR) | |
474 | return -EINVAL; | |
b996ad0e | 475 | |
d74534c2 | 476 | return di->bus.read(di, di->regs[reg_index], single); |
a66f59ba SG |
477 | } |
478 | ||
b996ad0e | 479 | /* |
c5709032 | 480 | * Return the battery State-of-Charge |
b996ad0e RG |
481 | * Or < 0 if something fails. |
482 | */ | |
c5709032 | 483 | static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) |
b996ad0e | 484 | { |
c5709032 | 485 | int soc; |
b996ad0e | 486 | |
549d7b31 NS |
487 | if (di->chip == BQ27000 || di->chip == BQ27010) |
488 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true); | |
489 | else | |
490 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); | |
297a533b | 491 | |
c5709032 AD |
492 | if (soc < 0) |
493 | dev_dbg(di->dev, "error reading State-of-Charge\n"); | |
297a533b | 494 | |
c5709032 | 495 | return soc; |
b996ad0e RG |
496 | } |
497 | ||
631c17ee PR |
498 | /* |
499 | * Return a battery charge value in µAh | |
500 | * Or < 0 if something fails. | |
501 | */ | |
081bab21 | 502 | static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) |
631c17ee PR |
503 | { |
504 | int charge; | |
505 | ||
081bab21 | 506 | charge = bq27xxx_read(di, reg, false); |
631c17ee | 507 | if (charge < 0) { |
c6cd4f26 PR |
508 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
509 | reg, charge); | |
631c17ee PR |
510 | return charge; |
511 | } | |
512 | ||
d74534c2 AD |
513 | if (di->chip == BQ27000 || di->chip == BQ27010) |
514 | charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 515 | else |
d74534c2 | 516 | charge *= 1000; |
631c17ee PR |
517 | |
518 | return charge; | |
519 | } | |
520 | ||
521 | /* | |
c5709032 | 522 | * Return the battery Nominal available capacity in µAh |
631c17ee PR |
523 | * Or < 0 if something fails. |
524 | */ | |
081bab21 | 525 | static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) |
631c17ee | 526 | { |
e59ec4a1 | 527 | int flags; |
e59ec4a1 | 528 | |
d74534c2 AD |
529 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
530 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); | |
531 | if (flags >= 0 && (flags & BQ27000_FLAG_CI)) | |
532 | return -ENODATA; | |
533 | } | |
e59ec4a1 | 534 | |
d74534c2 | 535 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); |
631c17ee PR |
536 | } |
537 | ||
538 | /* | |
d74534c2 | 539 | * Return the battery Full Charge Capacity in µAh |
631c17ee PR |
540 | * Or < 0 if something fails. |
541 | */ | |
d74534c2 | 542 | static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) |
631c17ee | 543 | { |
d74534c2 | 544 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); |
631c17ee PR |
545 | } |
546 | ||
547 | /* | |
d74534c2 | 548 | * Return the Design Capacity in µAh |
631c17ee PR |
549 | * Or < 0 if something fails. |
550 | */ | |
d74534c2 | 551 | static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) |
631c17ee | 552 | { |
d74534c2 | 553 | int dcap; |
631c17ee | 554 | |
549d7b31 NS |
555 | if (di->chip == BQ27000 || di->chip == BQ27010) |
556 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true); | |
557 | else | |
558 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); | |
631c17ee | 559 | |
d74534c2 | 560 | if (dcap < 0) { |
c6cd4f26 | 561 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
d74534c2 | 562 | return dcap; |
631c17ee PR |
563 | } |
564 | ||
d74534c2 | 565 | if (di->chip == BQ27000 || di->chip == BQ27010) |
549d7b31 | 566 | dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
631c17ee | 567 | else |
d74534c2 | 568 | dcap *= 1000; |
631c17ee | 569 | |
d74534c2 | 570 | return dcap; |
631c17ee PR |
571 | } |
572 | ||
a8f6bd23 PR |
573 | /* |
574 | * Return the battery Available energy in µWh | |
575 | * Or < 0 if something fails. | |
576 | */ | |
081bab21 | 577 | static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) |
a8f6bd23 PR |
578 | { |
579 | int ae; | |
580 | ||
d74534c2 | 581 | ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); |
a8f6bd23 | 582 | if (ae < 0) { |
c6cd4f26 | 583 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
584 | return ae; |
585 | } | |
586 | ||
d74534c2 AD |
587 | if (di->chip == BQ27000 || di->chip == BQ27010) |
588 | ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; | |
a8f6bd23 | 589 | else |
d74534c2 | 590 | ae *= 1000; |
a8f6bd23 PR |
591 | |
592 | return ae; | |
593 | } | |
594 | ||
d149e98e | 595 | /* |
5dc3443e | 596 | * Return the battery temperature in tenths of degree Kelvin |
d149e98e PR |
597 | * Or < 0 if something fails. |
598 | */ | |
081bab21 | 599 | static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) |
d149e98e PR |
600 | { |
601 | int temp; | |
602 | ||
d74534c2 | 603 | temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); |
d149e98e PR |
604 | if (temp < 0) { |
605 | dev_err(di->dev, "error reading temperature\n"); | |
606 | return temp; | |
607 | } | |
608 | ||
d74534c2 | 609 | if (di->chip == BQ27000 || di->chip == BQ27010) |
5dc3443e | 610 | temp = 5 * temp / 2; |
d149e98e PR |
611 | |
612 | return temp; | |
613 | } | |
614 | ||
631c17ee PR |
615 | /* |
616 | * Return the battery Cycle count total | |
617 | * Or < 0 if something fails. | |
618 | */ | |
081bab21 | 619 | static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) |
631c17ee PR |
620 | { |
621 | int cyct; | |
622 | ||
d74534c2 | 623 | cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); |
631c17ee PR |
624 | if (cyct < 0) |
625 | dev_err(di->dev, "error reading cycle count total\n"); | |
626 | ||
627 | return cyct; | |
628 | } | |
629 | ||
b996ad0e | 630 | /* |
297a533b LPC |
631 | * Read a time register. |
632 | * Return < 0 if something fails. | |
b996ad0e | 633 | */ |
081bab21 | 634 | static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) |
b996ad0e | 635 | { |
297a533b | 636 | int tval; |
b996ad0e | 637 | |
081bab21 | 638 | tval = bq27xxx_read(di, reg, false); |
297a533b | 639 | if (tval < 0) { |
c6cd4f26 PR |
640 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
641 | reg, tval); | |
297a533b | 642 | return tval; |
b996ad0e RG |
643 | } |
644 | ||
297a533b LPC |
645 | if (tval == 65535) |
646 | return -ENODATA; | |
647 | ||
648 | return tval * 60; | |
649 | } | |
650 | ||
9903e627 | 651 | /* |
c5709032 | 652 | * Read an average power register. |
9903e627 SR |
653 | * Return < 0 if something fails. |
654 | */ | |
d74534c2 | 655 | static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) |
9903e627 SR |
656 | { |
657 | int tval; | |
658 | ||
d74534c2 | 659 | tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
9903e627 | 660 | if (tval < 0) { |
d74534c2 AD |
661 | dev_err(di->dev, "error reading average power register %02x: %d\n", |
662 | BQ27XXX_REG_AP, tval); | |
9903e627 SR |
663 | return tval; |
664 | } | |
665 | ||
d74534c2 AD |
666 | if (di->chip == BQ27000 || di->chip == BQ27010) |
667 | return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; | |
668 | else | |
9903e627 | 669 | return tval; |
d74534c2 AD |
670 | } |
671 | ||
672 | /* | |
673 | * Returns true if a battery over temperature condition is detected | |
674 | */ | |
74aab849 | 675 | static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
d74534c2 | 676 | { |
e839a448 | 677 | switch (di->chip) { |
818e3012 | 678 | case BQ2750X: |
6da6e4bd | 679 | case BQ2751X: |
e839a448 CL |
680 | case BQ27541: |
681 | case BQ27545: | |
d74534c2 | 682 | return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
e839a448 CL |
683 | case BQ27530: |
684 | case BQ27421: | |
74aab849 | 685 | return flags & BQ27XXX_FLAG_OT; |
e839a448 CL |
686 | default: |
687 | return false; | |
688 | } | |
74aab849 AD |
689 | } |
690 | ||
691 | /* | |
692 | * Returns true if a battery under temperature condition is detected | |
693 | */ | |
694 | static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) | |
695 | { | |
696 | if (di->chip == BQ27530 || di->chip == BQ27421) | |
697 | return flags & BQ27XXX_FLAG_UT; | |
698 | ||
699 | return false; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Returns true if a low state of charge condition is detected | |
704 | */ | |
705 | static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) | |
706 | { | |
707 | if (di->chip == BQ27000 || di->chip == BQ27010) | |
708 | return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); | |
9903e627 | 709 | else |
74aab849 | 710 | return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); |
9903e627 SR |
711 | } |
712 | ||
713 | /* | |
714 | * Read flag register. | |
715 | * Return < 0 if something fails. | |
716 | */ | |
081bab21 | 717 | static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) |
9903e627 | 718 | { |
2edd69a8 | 719 | int flags; |
e4a404a0 | 720 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; |
9903e627 | 721 | |
e4a404a0 | 722 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
74aab849 AD |
723 | if (flags < 0) { |
724 | dev_err(di->dev, "error reading flag register:%d\n", flags); | |
725 | return flags; | |
9903e627 SR |
726 | } |
727 | ||
74aab849 AD |
728 | /* Unlikely but important to return first */ |
729 | if (unlikely(bq27xxx_battery_overtemp(di, flags))) | |
730 | return POWER_SUPPLY_HEALTH_OVERHEAT; | |
731 | if (unlikely(bq27xxx_battery_undertemp(di, flags))) | |
732 | return POWER_SUPPLY_HEALTH_COLD; | |
733 | if (unlikely(bq27xxx_battery_dead(di, flags))) | |
734 | return POWER_SUPPLY_HEALTH_DEAD; | |
9903e627 | 735 | |
74aab849 | 736 | return POWER_SUPPLY_HEALTH_GOOD; |
9903e627 SR |
737 | } |
738 | ||
703df6c0 | 739 | void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
297a533b | 740 | { |
081bab21 | 741 | struct bq27xxx_reg_cache cache = {0, }; |
d74534c2 AD |
742 | bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; |
743 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; | |
297a533b | 744 | |
d74534c2 | 745 | cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
3dd843e1 | 746 | if ((cache.flags & 0xff) == 0xff) |
d74534c2 | 747 | cache.flags = -1; /* read error */ |
297a533b | 748 | if (cache.flags >= 0) { |
d74534c2 AD |
749 | cache.temperature = bq27xxx_battery_read_temperature(di); |
750 | if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { | |
1f94b256 | 751 | dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 752 | cache.capacity = -ENODATA; |
a8f6bd23 | 753 | cache.energy = -ENODATA; |
4b226c2c PR |
754 | cache.time_to_empty = -ENODATA; |
755 | cache.time_to_empty_avg = -ENODATA; | |
756 | cache.time_to_full = -ENODATA; | |
757 | cache.charge_full = -ENODATA; | |
9903e627 | 758 | cache.health = -ENODATA; |
4b226c2c | 759 | } else { |
d74534c2 AD |
760 | if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) |
761 | cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); | |
762 | if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) | |
763 | cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); | |
764 | if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) | |
765 | cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); | |
766 | cache.charge_full = bq27xxx_battery_read_fcc(di); | |
c5709032 | 767 | cache.capacity = bq27xxx_battery_read_soc(di); |
d74534c2 | 768 | if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) |
081bab21 | 769 | cache.energy = bq27xxx_battery_read_energy(di); |
081bab21 | 770 | cache.health = bq27xxx_battery_read_health(di); |
4b226c2c | 771 | } |
d74534c2 | 772 | if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) |
081bab21 | 773 | cache.cycle_count = bq27xxx_battery_read_cyct(di); |
d74534c2 AD |
774 | if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) |
775 | cache.power_avg = bq27xxx_battery_read_pwr_avg(di); | |
297a533b | 776 | |
631c17ee PR |
777 | /* We only have to read charge design full once */ |
778 | if (di->charge_design_full <= 0) | |
d74534c2 | 779 | di->charge_design_full = bq27xxx_battery_read_dcap(di); |
297a533b LPC |
780 | } |
781 | ||
90f04a28 | 782 | if (di->cache.capacity != cache.capacity) |
297d716f | 783 | power_supply_changed(di->bat); |
90f04a28 PV |
784 | |
785 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) | |
786 | di->cache = cache; | |
297a533b LPC |
787 | |
788 | di->last_update = jiffies; | |
789 | } | |
703df6c0 | 790 | EXPORT_SYMBOL_GPL(bq27xxx_battery_update); |
297a533b | 791 | |
081bab21 | 792 | static void bq27xxx_battery_poll(struct work_struct *work) |
740b755a | 793 | { |
081bab21 | 794 | struct bq27xxx_device_info *di = |
d74534c2 AD |
795 | container_of(work, struct bq27xxx_device_info, |
796 | work.work); | |
740b755a | 797 | |
081bab21 | 798 | bq27xxx_battery_update(di); |
740b755a | 799 | |
53bf837b | 800 | if (poll_interval > 0) |
740b755a | 801 | schedule_delayed_work(&di->work, poll_interval * HZ); |
740b755a LPC |
802 | } |
803 | ||
b996ad0e | 804 | /* |
bf7d4140 | 805 | * Return the battery average current in µA |
b996ad0e RG |
806 | * Note that current can be negative signed as well |
807 | * Or 0 if something fails. | |
808 | */ | |
081bab21 | 809 | static int bq27xxx_battery_current(struct bq27xxx_device_info *di, |
ce33edfa | 810 | union power_supply_propval *val) |
b996ad0e | 811 | { |
297a533b | 812 | int curr; |
b68f6216 | 813 | int flags; |
b996ad0e | 814 | |
d74534c2 | 815 | curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); |
c6cd4f26 PR |
816 | if (curr < 0) { |
817 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 818 | return curr; |
c6cd4f26 | 819 | } |
e20908d9 | 820 | |
d74534c2 | 821 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
e4a404a0 | 822 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); |
b68f6216 | 823 | if (flags & BQ27000_FLAG_CHGS) { |
e20908d9 | 824 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 825 | curr = -curr; |
e20908d9 | 826 | } |
b996ad0e | 827 | |
d74534c2 AD |
828 | val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
829 | } else { | |
830 | /* Other gauges return signed value */ | |
831 | val->intval = (int)((s16)curr) * 1000; | |
b996ad0e RG |
832 | } |
833 | ||
297a533b | 834 | return 0; |
b996ad0e RG |
835 | } |
836 | ||
081bab21 | 837 | static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
ce33edfa | 838 | union power_supply_propval *val) |
4e924a81 | 839 | { |
4e924a81 | 840 | int status; |
4e924a81 | 841 | |
d74534c2 | 842 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
c1b9ab67 LPC |
843 | if (di->cache.flags & BQ27000_FLAG_FC) |
844 | status = POWER_SUPPLY_STATUS_FULL; | |
845 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 846 | status = POWER_SUPPLY_STATUS_CHARGING; |
297d716f | 847 | else if (power_supply_am_i_supplied(di->bat)) |
c1b9ab67 | 848 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
4e924a81 GI |
849 | else |
850 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
d74534c2 AD |
851 | } else { |
852 | if (di->cache.flags & BQ27XXX_FLAG_FC) | |
853 | status = POWER_SUPPLY_STATUS_FULL; | |
854 | else if (di->cache.flags & BQ27XXX_FLAG_DSC) | |
855 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
856 | else | |
857 | status = POWER_SUPPLY_STATUS_CHARGING; | |
4e924a81 GI |
858 | } |
859 | ||
860 | val->intval = status; | |
297a533b | 861 | |
4e924a81 GI |
862 | return 0; |
863 | } | |
864 | ||
081bab21 | 865 | static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, |
ce33edfa | 866 | union power_supply_propval *val) |
d66bab3f PR |
867 | { |
868 | int level; | |
869 | ||
d74534c2 AD |
870 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
871 | if (di->cache.flags & BQ27000_FLAG_FC) | |
d66bab3f | 872 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 873 | else if (di->cache.flags & BQ27000_FLAG_EDV1) |
d66bab3f | 874 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 875 | else if (di->cache.flags & BQ27000_FLAG_EDVF) |
d66bab3f PR |
876 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
877 | else | |
878 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
879 | } else { | |
d74534c2 | 880 | if (di->cache.flags & BQ27XXX_FLAG_FC) |
d66bab3f | 881 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 882 | else if (di->cache.flags & BQ27XXX_FLAG_SOC1) |
d66bab3f | 883 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 884 | else if (di->cache.flags & BQ27XXX_FLAG_SOCF) |
d66bab3f PR |
885 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
886 | else | |
887 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
888 | } | |
889 | ||
890 | val->intval = level; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
4e924a81 | 895 | /* |
91fe4d50 | 896 | * Return the battery Voltage in millivolts |
297a533b | 897 | * Or < 0 if something fails. |
4e924a81 | 898 | */ |
081bab21 | 899 | static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, |
ce33edfa | 900 | union power_supply_propval *val) |
4e924a81 | 901 | { |
297a533b | 902 | int volt; |
4e924a81 | 903 | |
d74534c2 | 904 | volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); |
c6cd4f26 PR |
905 | if (volt < 0) { |
906 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 907 | return volt; |
c6cd4f26 | 908 | } |
4e924a81 | 909 | |
297a533b LPC |
910 | val->intval = volt * 1000; |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
081bab21 | 915 | static int bq27xxx_simple_value(int value, |
ce33edfa | 916 | union power_supply_propval *val) |
297a533b LPC |
917 | { |
918 | if (value < 0) | |
919 | return value; | |
920 | ||
921 | val->intval = value; | |
4e924a81 | 922 | |
4e924a81 GI |
923 | return 0; |
924 | } | |
925 | ||
081bab21 | 926 | static int bq27xxx_battery_get_property(struct power_supply *psy, |
b996ad0e RG |
927 | enum power_supply_property psp, |
928 | union power_supply_propval *val) | |
929 | { | |
4e924a81 | 930 | int ret = 0; |
081bab21 | 931 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
3413b4ea | 932 | |
740b755a LPC |
933 | mutex_lock(&di->lock); |
934 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
935 | cancel_delayed_work_sync(&di->work); | |
081bab21 | 936 | bq27xxx_battery_poll(&di->work.work); |
740b755a LPC |
937 | } |
938 | mutex_unlock(&di->lock); | |
297a533b LPC |
939 | |
940 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 941 | return -ENODEV; |
b996ad0e RG |
942 | |
943 | switch (psp) { | |
4e924a81 | 944 | case POWER_SUPPLY_PROP_STATUS: |
081bab21 | 945 | ret = bq27xxx_battery_status(di, val); |
4e924a81 | 946 | break; |
b996ad0e | 947 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
081bab21 | 948 | ret = bq27xxx_battery_voltage(di, val); |
3413b4ea | 949 | break; |
b996ad0e | 950 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 951 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
952 | break; |
953 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
081bab21 | 954 | ret = bq27xxx_battery_current(di, val); |
b996ad0e RG |
955 | break; |
956 | case POWER_SUPPLY_PROP_CAPACITY: | |
081bab21 | 957 | ret = bq27xxx_simple_value(di->cache.capacity, val); |
b996ad0e | 958 | break; |
d66bab3f | 959 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
081bab21 | 960 | ret = bq27xxx_battery_capacity_level(di, val); |
d66bab3f | 961 | break; |
b996ad0e | 962 | case POWER_SUPPLY_PROP_TEMP: |
081bab21 | 963 | ret = bq27xxx_simple_value(di->cache.temperature, val); |
5dc3443e | 964 | if (ret == 0) |
d74534c2 | 965 | val->intval -= 2731; /* convert decidegree k to c */ |
b996ad0e | 966 | break; |
4e924a81 | 967 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
081bab21 | 968 | ret = bq27xxx_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
969 | break; |
970 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
081bab21 | 971 | ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
972 | break; |
973 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
081bab21 | 974 | ret = bq27xxx_simple_value(di->cache.time_to_full, val); |
4e924a81 | 975 | break; |
5661f334 LPC |
976 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
977 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
978 | break; | |
631c17ee | 979 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
081bab21 | 980 | ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val); |
631c17ee PR |
981 | break; |
982 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
081bab21 | 983 | ret = bq27xxx_simple_value(di->cache.charge_full, val); |
631c17ee PR |
984 | break; |
985 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
081bab21 | 986 | ret = bq27xxx_simple_value(di->charge_design_full, val); |
631c17ee | 987 | break; |
73c244a8 | 988 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
081bab21 | 989 | ret = bq27xxx_simple_value(di->cache.cycle_count, val); |
631c17ee PR |
990 | break; |
991 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
081bab21 | 992 | ret = bq27xxx_simple_value(di->cache.energy, val); |
631c17ee | 993 | break; |
9903e627 | 994 | case POWER_SUPPLY_PROP_POWER_AVG: |
081bab21 | 995 | ret = bq27xxx_simple_value(di->cache.power_avg, val); |
9903e627 SR |
996 | break; |
997 | case POWER_SUPPLY_PROP_HEALTH: | |
081bab21 | 998 | ret = bq27xxx_simple_value(di->cache.health, val); |
9903e627 | 999 | break; |
db04fc5c AD |
1000 | case POWER_SUPPLY_PROP_MANUFACTURER: |
1001 | val->strval = BQ27XXX_MANUFACTURER; | |
1002 | break; | |
b996ad0e RG |
1003 | default: |
1004 | return -EINVAL; | |
1005 | } | |
1006 | ||
4e924a81 | 1007 | return ret; |
b996ad0e RG |
1008 | } |
1009 | ||
081bab21 | 1010 | static void bq27xxx_external_power_changed(struct power_supply *psy) |
740b755a | 1011 | { |
081bab21 | 1012 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
740b755a LPC |
1013 | |
1014 | cancel_delayed_work_sync(&di->work); | |
1015 | schedule_delayed_work(&di->work, 0); | |
1016 | } | |
1017 | ||
703df6c0 | 1018 | int bq27xxx_battery_setup(struct bq27xxx_device_info *di) |
b996ad0e | 1019 | { |
297d716f KK |
1020 | struct power_supply_desc *psy_desc; |
1021 | struct power_supply_config psy_cfg = { .drv_data = di, }; | |
1022 | ||
703df6c0 AD |
1023 | INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll); |
1024 | mutex_init(&di->lock); | |
1025 | di->regs = bq27xxx_regs[di->chip]; | |
1026 | ||
297d716f KK |
1027 | psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL); |
1028 | if (!psy_desc) | |
1029 | return -ENOMEM; | |
a40402ef | 1030 | |
703df6c0 | 1031 | psy_desc->name = di->name; |
297d716f | 1032 | psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; |
d74534c2 AD |
1033 | psy_desc->properties = bq27xxx_battery_props[di->chip].props; |
1034 | psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; | |
081bab21 AD |
1035 | psy_desc->get_property = bq27xxx_battery_get_property; |
1036 | psy_desc->external_power_changed = bq27xxx_external_power_changed; | |
740b755a | 1037 | |
297d716f KK |
1038 | di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg); |
1039 | if (IS_ERR(di->bat)) { | |
703df6c0 AD |
1040 | dev_err(di->dev, "failed to register battery\n"); |
1041 | return PTR_ERR(di->bat); | |
a40402ef LPC |
1042 | } |
1043 | ||
1044 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
1045 | ||
081bab21 | 1046 | bq27xxx_battery_update(di); |
297a533b | 1047 | |
1d72706f MR |
1048 | mutex_lock(&bq27xxx_list_lock); |
1049 | list_add(&di->list, &bq27xxx_battery_devices); | |
1050 | mutex_unlock(&bq27xxx_list_lock); | |
1051 | ||
a40402ef | 1052 | return 0; |
b996ad0e | 1053 | } |
703df6c0 | 1054 | EXPORT_SYMBOL_GPL(bq27xxx_battery_setup); |
b996ad0e | 1055 | |
703df6c0 | 1056 | void bq27xxx_battery_teardown(struct bq27xxx_device_info *di) |
740b755a | 1057 | { |
8cfaaa81 | 1058 | /* |
081bab21 AD |
1059 | * power_supply_unregister call bq27xxx_battery_get_property which |
1060 | * call bq27xxx_battery_poll. | |
1061 | * Make sure that bq27xxx_battery_poll will not call | |
8cfaaa81 PR |
1062 | * schedule_delayed_work again after unregister (which cause OOPS). |
1063 | */ | |
1064 | poll_interval = 0; | |
1065 | ||
740b755a LPC |
1066 | cancel_delayed_work_sync(&di->work); |
1067 | ||
297d716f | 1068 | power_supply_unregister(di->bat); |
740b755a | 1069 | |
1d72706f MR |
1070 | mutex_lock(&bq27xxx_list_lock); |
1071 | list_del(&di->list); | |
1072 | mutex_unlock(&bq27xxx_list_lock); | |
1073 | ||
740b755a LPC |
1074 | mutex_destroy(&di->lock); |
1075 | } | |
703df6c0 | 1076 | EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown); |
7fb7ba58 | 1077 | |
081bab21 AD |
1078 | static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg, |
1079 | bool single) | |
7fb7ba58 LPC |
1080 | { |
1081 | struct device *dev = di->dev; | |
081bab21 | 1082 | struct bq27xxx_platform_data *pdata = dev->platform_data; |
7fb7ba58 LPC |
1083 | unsigned int timeout = 3; |
1084 | int upper, lower; | |
1085 | int temp; | |
1086 | ||
1087 | if (!single) { | |
1088 | /* Make sure the value has not changed in between reading the | |
1089 | * lower and the upper part */ | |
1090 | upper = pdata->read(dev, reg + 1); | |
1091 | do { | |
1092 | temp = upper; | |
1093 | if (upper < 0) | |
1094 | return upper; | |
1095 | ||
1096 | lower = pdata->read(dev, reg); | |
1097 | if (lower < 0) | |
1098 | return lower; | |
1099 | ||
1100 | upper = pdata->read(dev, reg + 1); | |
1101 | } while (temp != upper && --timeout); | |
1102 | ||
1103 | if (timeout == 0) | |
1104 | return -EIO; | |
1105 | ||
297a533b | 1106 | return (upper << 8) | lower; |
7fb7ba58 | 1107 | } |
297a533b LPC |
1108 | |
1109 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
1110 | } |
1111 | ||
081bab21 | 1112 | static int bq27xxx_battery_platform_probe(struct platform_device *pdev) |
7fb7ba58 | 1113 | { |
081bab21 AD |
1114 | struct bq27xxx_device_info *di; |
1115 | struct bq27xxx_platform_data *pdata = pdev->dev.platform_data; | |
7fb7ba58 LPC |
1116 | |
1117 | if (!pdata) { | |
1118 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
1119 | return -EINVAL; | |
1120 | } | |
1121 | ||
1122 | if (!pdata->read) { | |
1123 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
424cfde4 AD |
1127 | if (!pdata->chip) { |
1128 | dev_err(&pdev->dev, "no device supplied\n"); | |
1129 | return -EINVAL; | |
1130 | } | |
1131 | ||
1cb82fdb | 1132 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
6d0a1815 | 1133 | if (!di) |
7fb7ba58 | 1134 | return -ENOMEM; |
7fb7ba58 LPC |
1135 | |
1136 | platform_set_drvdata(pdev, di); | |
1137 | ||
1138 | di->dev = &pdev->dev; | |
424cfde4 | 1139 | di->chip = pdata->chip; |
703df6c0 AD |
1140 | di->name = pdata->name ?: dev_name(&pdev->dev); |
1141 | di->bus.read = bq27xxx_battery_platform_read; | |
7fb7ba58 | 1142 | |
703df6c0 | 1143 | return bq27xxx_battery_setup(di); |
7fb7ba58 LPC |
1144 | } |
1145 | ||
081bab21 | 1146 | static int bq27xxx_battery_platform_remove(struct platform_device *pdev) |
7fb7ba58 | 1147 | { |
081bab21 | 1148 | struct bq27xxx_device_info *di = platform_get_drvdata(pdev); |
7fb7ba58 | 1149 | |
703df6c0 | 1150 | bq27xxx_battery_teardown(di); |
740b755a | 1151 | |
7fb7ba58 LPC |
1152 | return 0; |
1153 | } | |
1154 | ||
703df6c0 AD |
1155 | static const struct platform_device_id bq27xxx_battery_platform_id_table[] = { |
1156 | { "bq27000-battery", }, | |
1157 | { /* sentinel */ } | |
1158 | }; | |
1159 | MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table); | |
1160 | ||
7df3a746 PR |
1161 | #ifdef CONFIG_OF |
1162 | static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = { | |
1163 | { .compatible = "ti,bq27000" }, | |
1164 | {}, | |
1165 | }; | |
1166 | MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table); | |
1167 | #endif | |
1168 | ||
081bab21 AD |
1169 | static struct platform_driver bq27xxx_battery_platform_driver = { |
1170 | .probe = bq27xxx_battery_platform_probe, | |
1171 | .remove = bq27xxx_battery_platform_remove, | |
7fb7ba58 LPC |
1172 | .driver = { |
1173 | .name = "bq27000-battery", | |
7df3a746 | 1174 | .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table), |
7fb7ba58 | 1175 | }, |
703df6c0 | 1176 | .id_table = bq27xxx_battery_platform_id_table, |
7fb7ba58 | 1177 | }; |
703df6c0 | 1178 | module_platform_driver(bq27xxx_battery_platform_driver); |
8ebb7e9c | 1179 | |
7df3a746 PR |
1180 | MODULE_ALIAS("platform:bq27000-battery"); |
1181 | ||
b996ad0e | 1182 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
081bab21 | 1183 | MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
b996ad0e | 1184 | MODULE_LICENSE("GPL"); |