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Commit | Line | Data |
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b996ad0e | 1 | /* |
081bab21 | 2 | * BQ27xxx battery driver |
b996ad0e RG |
3 | * |
4 | * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> | |
5 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> | |
7fb7ba58 | 6 | * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de> |
73c244a8 | 7 | * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com> |
b996ad0e RG |
8 | * |
9 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. | |
10 | * | |
11 | * This package is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | * | |
631c17ee | 19 | * Datasheets: |
d74534c2 AD |
20 | * http://www.ti.com/product/bq27000 |
21 | * http://www.ti.com/product/bq27200 | |
22 | * http://www.ti.com/product/bq27010 | |
23 | * http://www.ti.com/product/bq27210 | |
24 | * http://www.ti.com/product/bq27500 | |
25 | * http://www.ti.com/product/bq27510-g3 | |
26 | * http://www.ti.com/product/bq27520-g4 | |
27 | * http://www.ti.com/product/bq27530-g1 | |
28 | * http://www.ti.com/product/bq27531-g1 | |
29 | * http://www.ti.com/product/bq27541-g1 | |
30 | * http://www.ti.com/product/bq27542-g1 | |
31 | * http://www.ti.com/product/bq27546-g1 | |
32 | * http://www.ti.com/product/bq27742-g1 | |
33 | * http://www.ti.com/product/bq27545-g1 | |
34 | * http://www.ti.com/product/bq27421-g1 | |
a66f59ba | 35 | * http://www.ti.com/product/bq27425-g1 |
d74534c2 AD |
36 | * http://www.ti.com/product/bq27411-g1 |
37 | * http://www.ti.com/product/bq27621-g1 | |
631c17ee PR |
38 | */ |
39 | ||
1cb82fdb | 40 | #include <linux/device.h> |
b996ad0e RG |
41 | #include <linux/module.h> |
42 | #include <linux/param.h> | |
43 | #include <linux/jiffies.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/platform_device.h> | |
47 | #include <linux/power_supply.h> | |
5a0e3ad6 | 48 | #include <linux/slab.h> |
7df3a746 | 49 | #include <linux/of.h> |
b996ad0e | 50 | |
081bab21 | 51 | #include <linux/power/bq27xxx_battery.h> |
7fb7ba58 | 52 | |
6eb207f2 | 53 | #define DRIVER_VERSION "1.2.0" |
b996ad0e | 54 | |
db04fc5c AD |
55 | #define BQ27XXX_MANUFACTURER "Texas Instruments" |
56 | ||
d74534c2 AD |
57 | /* BQ27XXX Flags */ |
58 | #define BQ27XXX_FLAG_DSC BIT(0) | |
59 | #define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ | |
60 | #define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ | |
61 | #define BQ27XXX_FLAG_FC BIT(9) | |
62 | #define BQ27XXX_FLAG_OTD BIT(14) | |
63 | #define BQ27XXX_FLAG_OTC BIT(15) | |
74aab849 AD |
64 | #define BQ27XXX_FLAG_UT BIT(14) |
65 | #define BQ27XXX_FLAG_OT BIT(15) | |
d74534c2 AD |
66 | |
67 | /* BQ27000 has different layout for Flags register */ | |
6eb207f2 AD |
68 | #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ |
69 | #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ | |
70 | #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ | |
71 | #define BQ27000_FLAG_FC BIT(5) | |
72 | #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ | |
73 | ||
d74534c2 AD |
74 | #define BQ27XXX_RS (20) /* Resistor sense mOhm */ |
75 | #define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */ | |
76 | #define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */ | |
a2e5118c | 77 | |
d74534c2 AD |
78 | #define INVALID_REG_ADDR 0xff |
79 | ||
80 | /* | |
81 | * bq27xxx_reg_index - Register names | |
82 | * | |
83 | * These are indexes into a device's register mapping array. | |
84 | */ | |
2e05b518 | 85 | |
d74534c2 AD |
86 | enum bq27xxx_reg_index { |
87 | BQ27XXX_REG_CTRL = 0, /* Control */ | |
88 | BQ27XXX_REG_TEMP, /* Temperature */ | |
89 | BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ | |
90 | BQ27XXX_REG_VOLT, /* Voltage */ | |
91 | BQ27XXX_REG_AI, /* Average Current */ | |
92 | BQ27XXX_REG_FLAGS, /* Flags */ | |
93 | BQ27XXX_REG_TTE, /* Time-to-Empty */ | |
94 | BQ27XXX_REG_TTF, /* Time-to-Full */ | |
95 | BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ | |
96 | BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ | |
97 | BQ27XXX_REG_NAC, /* Nominal Available Capacity */ | |
98 | BQ27XXX_REG_FCC, /* Full Charge Capacity */ | |
99 | BQ27XXX_REG_CYCT, /* Cycle Count */ | |
100 | BQ27XXX_REG_AE, /* Available Energy */ | |
101 | BQ27XXX_REG_SOC, /* State-of-Charge */ | |
102 | BQ27XXX_REG_DCAP, /* Design Capacity */ | |
103 | BQ27XXX_REG_AP, /* Average Power */ | |
2e05b518 | 104 | BQ27XXX_REG_MAX, /* sentinel */ |
d74534c2 AD |
105 | }; |
106 | ||
d74534c2 | 107 | /* Register mappings */ |
2e05b518 AD |
108 | static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = { |
109 | [BQ27000] = { | |
110 | [BQ27XXX_REG_CTRL] = 0x00, | |
111 | [BQ27XXX_REG_TEMP] = 0x06, | |
112 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
113 | [BQ27XXX_REG_VOLT] = 0x08, | |
114 | [BQ27XXX_REG_AI] = 0x14, | |
115 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
116 | [BQ27XXX_REG_TTE] = 0x16, | |
117 | [BQ27XXX_REG_TTF] = 0x18, | |
118 | [BQ27XXX_REG_TTES] = 0x1c, | |
119 | [BQ27XXX_REG_TTECP] = 0x26, | |
120 | [BQ27XXX_REG_NAC] = 0x0c, | |
121 | [BQ27XXX_REG_FCC] = 0x12, | |
122 | [BQ27XXX_REG_CYCT] = 0x2a, | |
123 | [BQ27XXX_REG_AE] = 0x22, | |
124 | [BQ27XXX_REG_SOC] = 0x0b, | |
125 | [BQ27XXX_REG_DCAP] = 0x76, | |
126 | [BQ27XXX_REG_AP] = 0x24, | |
127 | }, | |
128 | [BQ27010] = { | |
129 | [BQ27XXX_REG_CTRL] = 0x00, | |
130 | [BQ27XXX_REG_TEMP] = 0x06, | |
131 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
132 | [BQ27XXX_REG_VOLT] = 0x08, | |
133 | [BQ27XXX_REG_AI] = 0x14, | |
134 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
135 | [BQ27XXX_REG_TTE] = 0x16, | |
136 | [BQ27XXX_REG_TTF] = 0x18, | |
137 | [BQ27XXX_REG_TTES] = 0x1c, | |
138 | [BQ27XXX_REG_TTECP] = 0x26, | |
139 | [BQ27XXX_REG_NAC] = 0x0c, | |
140 | [BQ27XXX_REG_FCC] = 0x12, | |
141 | [BQ27XXX_REG_CYCT] = 0x2a, | |
142 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
143 | [BQ27XXX_REG_SOC] = 0x0b, | |
144 | [BQ27XXX_REG_DCAP] = 0x76, | |
145 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
146 | }, | |
147 | [BQ27500] = { | |
148 | [BQ27XXX_REG_CTRL] = 0x00, | |
149 | [BQ27XXX_REG_TEMP] = 0x06, | |
150 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
151 | [BQ27XXX_REG_VOLT] = 0x08, | |
152 | [BQ27XXX_REG_AI] = 0x14, | |
153 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
154 | [BQ27XXX_REG_TTE] = 0x16, | |
155 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
156 | [BQ27XXX_REG_TTES] = 0x1a, | |
157 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
158 | [BQ27XXX_REG_NAC] = 0x0c, | |
159 | [BQ27XXX_REG_FCC] = 0x12, | |
160 | [BQ27XXX_REG_CYCT] = 0x2a, | |
161 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
162 | [BQ27XXX_REG_SOC] = 0x2c, | |
163 | [BQ27XXX_REG_DCAP] = 0x3c, | |
164 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
165 | }, | |
166 | [BQ27530] = { | |
167 | [BQ27XXX_REG_CTRL] = 0x00, | |
168 | [BQ27XXX_REG_TEMP] = 0x06, | |
169 | [BQ27XXX_REG_INT_TEMP] = 0x32, | |
170 | [BQ27XXX_REG_VOLT] = 0x08, | |
171 | [BQ27XXX_REG_AI] = 0x14, | |
172 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
173 | [BQ27XXX_REG_TTE] = 0x16, | |
174 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
175 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
176 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
177 | [BQ27XXX_REG_NAC] = 0x0c, | |
178 | [BQ27XXX_REG_FCC] = 0x12, | |
179 | [BQ27XXX_REG_CYCT] = 0x2a, | |
180 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
181 | [BQ27XXX_REG_SOC] = 0x2c, | |
182 | [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, | |
183 | [BQ27XXX_REG_AP] = 0x24, | |
184 | }, | |
185 | [BQ27541] = { | |
186 | [BQ27XXX_REG_CTRL] = 0x00, | |
187 | [BQ27XXX_REG_TEMP] = 0x06, | |
188 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
189 | [BQ27XXX_REG_VOLT] = 0x08, | |
190 | [BQ27XXX_REG_AI] = 0x14, | |
191 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
192 | [BQ27XXX_REG_TTE] = 0x16, | |
193 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
194 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
195 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
196 | [BQ27XXX_REG_NAC] = 0x0c, | |
197 | [BQ27XXX_REG_FCC] = 0x12, | |
198 | [BQ27XXX_REG_CYCT] = 0x2a, | |
199 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
200 | [BQ27XXX_REG_SOC] = 0x2c, | |
201 | [BQ27XXX_REG_DCAP] = 0x3c, | |
202 | [BQ27XXX_REG_AP] = 0x24, | |
203 | }, | |
204 | [BQ27545] = { | |
205 | [BQ27XXX_REG_CTRL] = 0x00, | |
206 | [BQ27XXX_REG_TEMP] = 0x06, | |
207 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
208 | [BQ27XXX_REG_VOLT] = 0x08, | |
209 | [BQ27XXX_REG_AI] = 0x14, | |
210 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
211 | [BQ27XXX_REG_TTE] = 0x16, | |
212 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
213 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
214 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
215 | [BQ27XXX_REG_NAC] = 0x0c, | |
216 | [BQ27XXX_REG_FCC] = 0x12, | |
217 | [BQ27XXX_REG_CYCT] = 0x2a, | |
218 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
219 | [BQ27XXX_REG_SOC] = 0x2c, | |
220 | [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, | |
221 | [BQ27XXX_REG_AP] = 0x24, | |
222 | }, | |
223 | [BQ27421] = { | |
224 | [BQ27XXX_REG_CTRL] = 0x00, | |
225 | [BQ27XXX_REG_TEMP] = 0x02, | |
226 | [BQ27XXX_REG_INT_TEMP] = 0x1e, | |
227 | [BQ27XXX_REG_VOLT] = 0x04, | |
228 | [BQ27XXX_REG_AI] = 0x10, | |
229 | [BQ27XXX_REG_FLAGS] = 0x06, | |
230 | [BQ27XXX_REG_TTE] = INVALID_REG_ADDR, | |
231 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
232 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
233 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
234 | [BQ27XXX_REG_NAC] = 0x08, | |
235 | [BQ27XXX_REG_FCC] = 0x0e, | |
236 | [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR, | |
237 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
238 | [BQ27XXX_REG_SOC] = 0x1c, | |
239 | [BQ27XXX_REG_DCAP] = 0x3c, | |
240 | [BQ27XXX_REG_AP] = 0x18, | |
241 | }, | |
d74534c2 AD |
242 | }; |
243 | ||
244 | static enum power_supply_property bq27000_battery_props[] = { | |
4e924a81 | 245 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
246 | POWER_SUPPLY_PROP_PRESENT, |
247 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
248 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
249 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 250 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 251 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
252 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
253 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
254 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 255 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
256 | POWER_SUPPLY_PROP_CHARGE_FULL, |
257 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
258 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 259 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 260 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
261 | POWER_SUPPLY_PROP_POWER_AVG, |
262 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 263 | POWER_SUPPLY_PROP_MANUFACTURER, |
b996ad0e RG |
264 | }; |
265 | ||
d74534c2 | 266 | static enum power_supply_property bq27010_battery_props[] = { |
a66f59ba SG |
267 | POWER_SUPPLY_PROP_STATUS, |
268 | POWER_SUPPLY_PROP_PRESENT, | |
269 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
270 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
271 | POWER_SUPPLY_PROP_CAPACITY, | |
272 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
273 | POWER_SUPPLY_PROP_TEMP, | |
d74534c2 AD |
274 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
275 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
276 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
a66f59ba SG |
277 | POWER_SUPPLY_PROP_TECHNOLOGY, |
278 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
279 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
280 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
d74534c2 AD |
281 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
282 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 283 | POWER_SUPPLY_PROP_MANUFACTURER, |
a66f59ba SG |
284 | }; |
285 | ||
d74534c2 | 286 | static enum power_supply_property bq27500_battery_props[] = { |
628ef02c PV |
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, | |
294 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
295 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
296 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
297 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
298 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
299 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
d74534c2 AD |
300 | POWER_SUPPLY_PROP_HEALTH, |
301 | POWER_SUPPLY_PROP_MANUFACTURER, | |
302 | }; | |
303 | ||
304 | static enum power_supply_property bq27530_battery_props[] = { | |
305 | POWER_SUPPLY_PROP_STATUS, | |
306 | POWER_SUPPLY_PROP_PRESENT, | |
307 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
308 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
309 | POWER_SUPPLY_PROP_CAPACITY, | |
310 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
311 | POWER_SUPPLY_PROP_TEMP, | |
312 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
313 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
314 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
315 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
628ef02c PV |
316 | POWER_SUPPLY_PROP_POWER_AVG, |
317 | POWER_SUPPLY_PROP_HEALTH, | |
d74534c2 | 318 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
db04fc5c | 319 | POWER_SUPPLY_PROP_MANUFACTURER, |
628ef02c PV |
320 | }; |
321 | ||
d74534c2 | 322 | static enum power_supply_property bq27541_battery_props[] = { |
f46bf82e AB |
323 | POWER_SUPPLY_PROP_STATUS, |
324 | POWER_SUPPLY_PROP_PRESENT, | |
325 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
326 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
327 | POWER_SUPPLY_PROP_CAPACITY, | |
328 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
329 | POWER_SUPPLY_PROP_TEMP, | |
330 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
331 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
332 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
333 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
334 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
335 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
336 | POWER_SUPPLY_PROP_POWER_AVG, | |
337 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 338 | POWER_SUPPLY_PROP_MANUFACTURER, |
f46bf82e AB |
339 | }; |
340 | ||
d74534c2 AD |
341 | static enum power_supply_property bq27545_battery_props[] = { |
342 | POWER_SUPPLY_PROP_STATUS, | |
343 | POWER_SUPPLY_PROP_PRESENT, | |
344 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
345 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
346 | POWER_SUPPLY_PROP_CAPACITY, | |
347 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
348 | POWER_SUPPLY_PROP_TEMP, | |
349 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
350 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
351 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
352 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
353 | POWER_SUPPLY_PROP_HEALTH, | |
354 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
355 | POWER_SUPPLY_PROP_POWER_AVG, | |
356 | POWER_SUPPLY_PROP_MANUFACTURER, | |
357 | }; | |
358 | ||
359 | static enum power_supply_property bq27421_battery_props[] = { | |
360 | POWER_SUPPLY_PROP_STATUS, | |
361 | POWER_SUPPLY_PROP_PRESENT, | |
362 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
363 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
364 | POWER_SUPPLY_PROP_CAPACITY, | |
365 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
366 | POWER_SUPPLY_PROP_TEMP, | |
367 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
368 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
369 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
370 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
371 | POWER_SUPPLY_PROP_MANUFACTURER, | |
372 | }; | |
373 | ||
374 | #define BQ27XXX_PROP(_id, _prop) \ | |
375 | [_id] = { \ | |
376 | .props = _prop, \ | |
377 | .size = ARRAY_SIZE(_prop), \ | |
378 | } | |
379 | ||
380 | static struct { | |
381 | enum power_supply_property *props; | |
382 | size_t size; | |
383 | } bq27xxx_battery_props[] = { | |
384 | BQ27XXX_PROP(BQ27000, bq27000_battery_props), | |
385 | BQ27XXX_PROP(BQ27010, bq27010_battery_props), | |
386 | BQ27XXX_PROP(BQ27500, bq27500_battery_props), | |
387 | BQ27XXX_PROP(BQ27530, bq27530_battery_props), | |
388 | BQ27XXX_PROP(BQ27541, bq27541_battery_props), | |
389 | BQ27XXX_PROP(BQ27545, bq27545_battery_props), | |
390 | BQ27XXX_PROP(BQ27421, bq27421_battery_props), | |
391 | }; | |
392 | ||
740b755a LPC |
393 | static unsigned int poll_interval = 360; |
394 | module_param(poll_interval, uint, 0644); | |
6d0a1815 AD |
395 | MODULE_PARM_DESC(poll_interval, |
396 | "battery poll interval in seconds - 0 disables polling"); | |
740b755a | 397 | |
b996ad0e | 398 | /* |
081bab21 | 399 | * Common code for BQ27xxx devices |
b996ad0e RG |
400 | */ |
401 | ||
d74534c2 | 402 | static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, |
ce33edfa | 403 | bool single) |
b996ad0e | 404 | { |
d74534c2 AD |
405 | /* Reports EINVAL for invalid/missing registers */ |
406 | if (!di || di->regs[reg_index] == INVALID_REG_ADDR) | |
407 | return -EINVAL; | |
b996ad0e | 408 | |
d74534c2 | 409 | return di->bus.read(di, di->regs[reg_index], single); |
a66f59ba SG |
410 | } |
411 | ||
b996ad0e | 412 | /* |
c5709032 | 413 | * Return the battery State-of-Charge |
b996ad0e RG |
414 | * Or < 0 if something fails. |
415 | */ | |
c5709032 | 416 | static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) |
b996ad0e | 417 | { |
c5709032 | 418 | int soc; |
b996ad0e | 419 | |
549d7b31 NS |
420 | if (di->chip == BQ27000 || di->chip == BQ27010) |
421 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true); | |
422 | else | |
423 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); | |
297a533b | 424 | |
c5709032 AD |
425 | if (soc < 0) |
426 | dev_dbg(di->dev, "error reading State-of-Charge\n"); | |
297a533b | 427 | |
c5709032 | 428 | return soc; |
b996ad0e RG |
429 | } |
430 | ||
631c17ee PR |
431 | /* |
432 | * Return a battery charge value in µAh | |
433 | * Or < 0 if something fails. | |
434 | */ | |
081bab21 | 435 | static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) |
631c17ee PR |
436 | { |
437 | int charge; | |
438 | ||
081bab21 | 439 | charge = bq27xxx_read(di, reg, false); |
631c17ee | 440 | if (charge < 0) { |
c6cd4f26 PR |
441 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
442 | reg, charge); | |
631c17ee PR |
443 | return charge; |
444 | } | |
445 | ||
d74534c2 AD |
446 | if (di->chip == BQ27000 || di->chip == BQ27010) |
447 | charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 448 | else |
d74534c2 | 449 | charge *= 1000; |
631c17ee PR |
450 | |
451 | return charge; | |
452 | } | |
453 | ||
454 | /* | |
c5709032 | 455 | * Return the battery Nominal available capacity in µAh |
631c17ee PR |
456 | * Or < 0 if something fails. |
457 | */ | |
081bab21 | 458 | static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) |
631c17ee | 459 | { |
e59ec4a1 | 460 | int flags; |
e59ec4a1 | 461 | |
d74534c2 AD |
462 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
463 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); | |
464 | if (flags >= 0 && (flags & BQ27000_FLAG_CI)) | |
465 | return -ENODATA; | |
466 | } | |
e59ec4a1 | 467 | |
d74534c2 | 468 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); |
631c17ee PR |
469 | } |
470 | ||
471 | /* | |
d74534c2 | 472 | * Return the battery Full Charge Capacity in µAh |
631c17ee PR |
473 | * Or < 0 if something fails. |
474 | */ | |
d74534c2 | 475 | static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) |
631c17ee | 476 | { |
d74534c2 | 477 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); |
631c17ee PR |
478 | } |
479 | ||
480 | /* | |
d74534c2 | 481 | * Return the Design Capacity in µAh |
631c17ee PR |
482 | * Or < 0 if something fails. |
483 | */ | |
d74534c2 | 484 | static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) |
631c17ee | 485 | { |
d74534c2 | 486 | int dcap; |
631c17ee | 487 | |
549d7b31 NS |
488 | if (di->chip == BQ27000 || di->chip == BQ27010) |
489 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true); | |
490 | else | |
491 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); | |
631c17ee | 492 | |
d74534c2 | 493 | if (dcap < 0) { |
c6cd4f26 | 494 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
d74534c2 | 495 | return dcap; |
631c17ee PR |
496 | } |
497 | ||
d74534c2 | 498 | if (di->chip == BQ27000 || di->chip == BQ27010) |
549d7b31 | 499 | dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
631c17ee | 500 | else |
d74534c2 | 501 | dcap *= 1000; |
631c17ee | 502 | |
d74534c2 | 503 | return dcap; |
631c17ee PR |
504 | } |
505 | ||
a8f6bd23 PR |
506 | /* |
507 | * Return the battery Available energy in µWh | |
508 | * Or < 0 if something fails. | |
509 | */ | |
081bab21 | 510 | static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) |
a8f6bd23 PR |
511 | { |
512 | int ae; | |
513 | ||
d74534c2 | 514 | ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); |
a8f6bd23 | 515 | if (ae < 0) { |
c6cd4f26 | 516 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
517 | return ae; |
518 | } | |
519 | ||
d74534c2 AD |
520 | if (di->chip == BQ27000 || di->chip == BQ27010) |
521 | ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; | |
a8f6bd23 | 522 | else |
d74534c2 | 523 | ae *= 1000; |
a8f6bd23 PR |
524 | |
525 | return ae; | |
526 | } | |
527 | ||
d149e98e | 528 | /* |
5dc3443e | 529 | * Return the battery temperature in tenths of degree Kelvin |
d149e98e PR |
530 | * Or < 0 if something fails. |
531 | */ | |
081bab21 | 532 | static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) |
d149e98e PR |
533 | { |
534 | int temp; | |
535 | ||
d74534c2 | 536 | temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); |
d149e98e PR |
537 | if (temp < 0) { |
538 | dev_err(di->dev, "error reading temperature\n"); | |
539 | return temp; | |
540 | } | |
541 | ||
d74534c2 | 542 | if (di->chip == BQ27000 || di->chip == BQ27010) |
5dc3443e | 543 | temp = 5 * temp / 2; |
d149e98e PR |
544 | |
545 | return temp; | |
546 | } | |
547 | ||
631c17ee PR |
548 | /* |
549 | * Return the battery Cycle count total | |
550 | * Or < 0 if something fails. | |
551 | */ | |
081bab21 | 552 | static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) |
631c17ee PR |
553 | { |
554 | int cyct; | |
555 | ||
d74534c2 | 556 | cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); |
631c17ee PR |
557 | if (cyct < 0) |
558 | dev_err(di->dev, "error reading cycle count total\n"); | |
559 | ||
560 | return cyct; | |
561 | } | |
562 | ||
b996ad0e | 563 | /* |
297a533b LPC |
564 | * Read a time register. |
565 | * Return < 0 if something fails. | |
b996ad0e | 566 | */ |
081bab21 | 567 | static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) |
b996ad0e | 568 | { |
297a533b | 569 | int tval; |
b996ad0e | 570 | |
081bab21 | 571 | tval = bq27xxx_read(di, reg, false); |
297a533b | 572 | if (tval < 0) { |
c6cd4f26 PR |
573 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
574 | reg, tval); | |
297a533b | 575 | return tval; |
b996ad0e RG |
576 | } |
577 | ||
297a533b LPC |
578 | if (tval == 65535) |
579 | return -ENODATA; | |
580 | ||
581 | return tval * 60; | |
582 | } | |
583 | ||
9903e627 | 584 | /* |
c5709032 | 585 | * Read an average power register. |
9903e627 SR |
586 | * Return < 0 if something fails. |
587 | */ | |
d74534c2 | 588 | static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) |
9903e627 SR |
589 | { |
590 | int tval; | |
591 | ||
d74534c2 | 592 | tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
9903e627 | 593 | if (tval < 0) { |
d74534c2 AD |
594 | dev_err(di->dev, "error reading average power register %02x: %d\n", |
595 | BQ27XXX_REG_AP, tval); | |
9903e627 SR |
596 | return tval; |
597 | } | |
598 | ||
d74534c2 AD |
599 | if (di->chip == BQ27000 || di->chip == BQ27010) |
600 | return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; | |
601 | else | |
9903e627 | 602 | return tval; |
d74534c2 AD |
603 | } |
604 | ||
605 | /* | |
606 | * Returns true if a battery over temperature condition is detected | |
607 | */ | |
74aab849 | 608 | static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
d74534c2 | 609 | { |
74aab849 | 610 | if (di->chip == BQ27500 || di->chip == BQ27541 || di->chip == BQ27545) |
d74534c2 | 611 | return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
74aab849 AD |
612 | if (di->chip == BQ27530 || di->chip == BQ27421) |
613 | return flags & BQ27XXX_FLAG_OT; | |
614 | ||
615 | return false; | |
616 | } | |
617 | ||
618 | /* | |
619 | * Returns true if a battery under temperature condition is detected | |
620 | */ | |
621 | static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) | |
622 | { | |
623 | if (di->chip == BQ27530 || di->chip == BQ27421) | |
624 | return flags & BQ27XXX_FLAG_UT; | |
625 | ||
626 | return false; | |
627 | } | |
628 | ||
629 | /* | |
630 | * Returns true if a low state of charge condition is detected | |
631 | */ | |
632 | static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) | |
633 | { | |
634 | if (di->chip == BQ27000 || di->chip == BQ27010) | |
635 | return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); | |
9903e627 | 636 | else |
74aab849 | 637 | return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); |
9903e627 SR |
638 | } |
639 | ||
640 | /* | |
641 | * Read flag register. | |
642 | * Return < 0 if something fails. | |
643 | */ | |
081bab21 | 644 | static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) |
9903e627 | 645 | { |
2edd69a8 | 646 | int flags; |
9903e627 | 647 | |
74aab849 AD |
648 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); |
649 | if (flags < 0) { | |
650 | dev_err(di->dev, "error reading flag register:%d\n", flags); | |
651 | return flags; | |
9903e627 SR |
652 | } |
653 | ||
74aab849 AD |
654 | /* Unlikely but important to return first */ |
655 | if (unlikely(bq27xxx_battery_overtemp(di, flags))) | |
656 | return POWER_SUPPLY_HEALTH_OVERHEAT; | |
657 | if (unlikely(bq27xxx_battery_undertemp(di, flags))) | |
658 | return POWER_SUPPLY_HEALTH_COLD; | |
659 | if (unlikely(bq27xxx_battery_dead(di, flags))) | |
660 | return POWER_SUPPLY_HEALTH_DEAD; | |
9903e627 | 661 | |
74aab849 | 662 | return POWER_SUPPLY_HEALTH_GOOD; |
9903e627 SR |
663 | } |
664 | ||
703df6c0 | 665 | void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
297a533b | 666 | { |
081bab21 | 667 | struct bq27xxx_reg_cache cache = {0, }; |
d74534c2 AD |
668 | bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; |
669 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; | |
297a533b | 670 | |
d74534c2 | 671 | cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
3dd843e1 | 672 | if ((cache.flags & 0xff) == 0xff) |
d74534c2 | 673 | cache.flags = -1; /* read error */ |
297a533b | 674 | if (cache.flags >= 0) { |
d74534c2 AD |
675 | cache.temperature = bq27xxx_battery_read_temperature(di); |
676 | if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { | |
1f94b256 | 677 | dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 678 | cache.capacity = -ENODATA; |
a8f6bd23 | 679 | cache.energy = -ENODATA; |
4b226c2c PR |
680 | cache.time_to_empty = -ENODATA; |
681 | cache.time_to_empty_avg = -ENODATA; | |
682 | cache.time_to_full = -ENODATA; | |
683 | cache.charge_full = -ENODATA; | |
9903e627 | 684 | cache.health = -ENODATA; |
4b226c2c | 685 | } else { |
d74534c2 AD |
686 | if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) |
687 | cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); | |
688 | if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) | |
689 | cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); | |
690 | if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) | |
691 | cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); | |
692 | cache.charge_full = bq27xxx_battery_read_fcc(di); | |
c5709032 | 693 | cache.capacity = bq27xxx_battery_read_soc(di); |
d74534c2 | 694 | if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) |
081bab21 | 695 | cache.energy = bq27xxx_battery_read_energy(di); |
081bab21 | 696 | cache.health = bq27xxx_battery_read_health(di); |
4b226c2c | 697 | } |
d74534c2 | 698 | if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) |
081bab21 | 699 | cache.cycle_count = bq27xxx_battery_read_cyct(di); |
d74534c2 AD |
700 | if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) |
701 | cache.power_avg = bq27xxx_battery_read_pwr_avg(di); | |
297a533b | 702 | |
631c17ee PR |
703 | /* We only have to read charge design full once */ |
704 | if (di->charge_design_full <= 0) | |
d74534c2 | 705 | di->charge_design_full = bq27xxx_battery_read_dcap(di); |
297a533b LPC |
706 | } |
707 | ||
90f04a28 | 708 | if (di->cache.capacity != cache.capacity) |
297d716f | 709 | power_supply_changed(di->bat); |
90f04a28 PV |
710 | |
711 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) | |
712 | di->cache = cache; | |
297a533b LPC |
713 | |
714 | di->last_update = jiffies; | |
715 | } | |
703df6c0 | 716 | EXPORT_SYMBOL_GPL(bq27xxx_battery_update); |
297a533b | 717 | |
081bab21 | 718 | static void bq27xxx_battery_poll(struct work_struct *work) |
740b755a | 719 | { |
081bab21 | 720 | struct bq27xxx_device_info *di = |
d74534c2 AD |
721 | container_of(work, struct bq27xxx_device_info, |
722 | work.work); | |
740b755a | 723 | |
081bab21 | 724 | bq27xxx_battery_update(di); |
740b755a | 725 | |
53bf837b | 726 | if (poll_interval > 0) |
740b755a | 727 | schedule_delayed_work(&di->work, poll_interval * HZ); |
740b755a LPC |
728 | } |
729 | ||
b996ad0e | 730 | /* |
bf7d4140 | 731 | * Return the battery average current in µA |
b996ad0e RG |
732 | * Note that current can be negative signed as well |
733 | * Or 0 if something fails. | |
734 | */ | |
081bab21 | 735 | static int bq27xxx_battery_current(struct bq27xxx_device_info *di, |
ce33edfa | 736 | union power_supply_propval *val) |
b996ad0e | 737 | { |
297a533b | 738 | int curr; |
b68f6216 | 739 | int flags; |
b996ad0e | 740 | |
d74534c2 | 741 | curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); |
c6cd4f26 PR |
742 | if (curr < 0) { |
743 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 744 | return curr; |
c6cd4f26 | 745 | } |
e20908d9 | 746 | |
d74534c2 AD |
747 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
748 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); | |
b68f6216 | 749 | if (flags & BQ27000_FLAG_CHGS) { |
e20908d9 | 750 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 751 | curr = -curr; |
e20908d9 | 752 | } |
b996ad0e | 753 | |
d74534c2 AD |
754 | val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
755 | } else { | |
756 | /* Other gauges return signed value */ | |
757 | val->intval = (int)((s16)curr) * 1000; | |
b996ad0e RG |
758 | } |
759 | ||
297a533b | 760 | return 0; |
b996ad0e RG |
761 | } |
762 | ||
081bab21 | 763 | static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
ce33edfa | 764 | union power_supply_propval *val) |
4e924a81 | 765 | { |
4e924a81 | 766 | int status; |
4e924a81 | 767 | |
d74534c2 | 768 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
c1b9ab67 LPC |
769 | if (di->cache.flags & BQ27000_FLAG_FC) |
770 | status = POWER_SUPPLY_STATUS_FULL; | |
771 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 772 | status = POWER_SUPPLY_STATUS_CHARGING; |
297d716f | 773 | else if (power_supply_am_i_supplied(di->bat)) |
c1b9ab67 | 774 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
4e924a81 GI |
775 | else |
776 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
d74534c2 AD |
777 | } else { |
778 | if (di->cache.flags & BQ27XXX_FLAG_FC) | |
779 | status = POWER_SUPPLY_STATUS_FULL; | |
780 | else if (di->cache.flags & BQ27XXX_FLAG_DSC) | |
781 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
782 | else | |
783 | status = POWER_SUPPLY_STATUS_CHARGING; | |
4e924a81 GI |
784 | } |
785 | ||
786 | val->intval = status; | |
297a533b | 787 | |
4e924a81 GI |
788 | return 0; |
789 | } | |
790 | ||
081bab21 | 791 | static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, |
ce33edfa | 792 | union power_supply_propval *val) |
d66bab3f PR |
793 | { |
794 | int level; | |
795 | ||
d74534c2 AD |
796 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
797 | if (di->cache.flags & BQ27000_FLAG_FC) | |
d66bab3f | 798 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 799 | else if (di->cache.flags & BQ27000_FLAG_EDV1) |
d66bab3f | 800 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 801 | else if (di->cache.flags & BQ27000_FLAG_EDVF) |
d66bab3f PR |
802 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
803 | else | |
804 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
805 | } else { | |
d74534c2 | 806 | if (di->cache.flags & BQ27XXX_FLAG_FC) |
d66bab3f | 807 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 808 | else if (di->cache.flags & BQ27XXX_FLAG_SOC1) |
d66bab3f | 809 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 810 | else if (di->cache.flags & BQ27XXX_FLAG_SOCF) |
d66bab3f PR |
811 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
812 | else | |
813 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
814 | } | |
815 | ||
816 | val->intval = level; | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
4e924a81 | 821 | /* |
91fe4d50 | 822 | * Return the battery Voltage in millivolts |
297a533b | 823 | * Or < 0 if something fails. |
4e924a81 | 824 | */ |
081bab21 | 825 | static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, |
ce33edfa | 826 | union power_supply_propval *val) |
4e924a81 | 827 | { |
297a533b | 828 | int volt; |
4e924a81 | 829 | |
d74534c2 | 830 | volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); |
c6cd4f26 PR |
831 | if (volt < 0) { |
832 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 833 | return volt; |
c6cd4f26 | 834 | } |
4e924a81 | 835 | |
297a533b LPC |
836 | val->intval = volt * 1000; |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
081bab21 | 841 | static int bq27xxx_simple_value(int value, |
ce33edfa | 842 | union power_supply_propval *val) |
297a533b LPC |
843 | { |
844 | if (value < 0) | |
845 | return value; | |
846 | ||
847 | val->intval = value; | |
4e924a81 | 848 | |
4e924a81 GI |
849 | return 0; |
850 | } | |
851 | ||
081bab21 | 852 | static int bq27xxx_battery_get_property(struct power_supply *psy, |
b996ad0e RG |
853 | enum power_supply_property psp, |
854 | union power_supply_propval *val) | |
855 | { | |
4e924a81 | 856 | int ret = 0; |
081bab21 | 857 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
3413b4ea | 858 | |
740b755a LPC |
859 | mutex_lock(&di->lock); |
860 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
861 | cancel_delayed_work_sync(&di->work); | |
081bab21 | 862 | bq27xxx_battery_poll(&di->work.work); |
740b755a LPC |
863 | } |
864 | mutex_unlock(&di->lock); | |
297a533b LPC |
865 | |
866 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 867 | return -ENODEV; |
b996ad0e RG |
868 | |
869 | switch (psp) { | |
4e924a81 | 870 | case POWER_SUPPLY_PROP_STATUS: |
081bab21 | 871 | ret = bq27xxx_battery_status(di, val); |
4e924a81 | 872 | break; |
b996ad0e | 873 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
081bab21 | 874 | ret = bq27xxx_battery_voltage(di, val); |
3413b4ea | 875 | break; |
b996ad0e | 876 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 877 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
878 | break; |
879 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
081bab21 | 880 | ret = bq27xxx_battery_current(di, val); |
b996ad0e RG |
881 | break; |
882 | case POWER_SUPPLY_PROP_CAPACITY: | |
081bab21 | 883 | ret = bq27xxx_simple_value(di->cache.capacity, val); |
b996ad0e | 884 | break; |
d66bab3f | 885 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
081bab21 | 886 | ret = bq27xxx_battery_capacity_level(di, val); |
d66bab3f | 887 | break; |
b996ad0e | 888 | case POWER_SUPPLY_PROP_TEMP: |
081bab21 | 889 | ret = bq27xxx_simple_value(di->cache.temperature, val); |
5dc3443e | 890 | if (ret == 0) |
d74534c2 | 891 | val->intval -= 2731; /* convert decidegree k to c */ |
b996ad0e | 892 | break; |
4e924a81 | 893 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
081bab21 | 894 | ret = bq27xxx_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
895 | break; |
896 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
081bab21 | 897 | ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
898 | break; |
899 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
081bab21 | 900 | ret = bq27xxx_simple_value(di->cache.time_to_full, val); |
4e924a81 | 901 | break; |
5661f334 LPC |
902 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
903 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
904 | break; | |
631c17ee | 905 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
081bab21 | 906 | ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val); |
631c17ee PR |
907 | break; |
908 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
081bab21 | 909 | ret = bq27xxx_simple_value(di->cache.charge_full, val); |
631c17ee PR |
910 | break; |
911 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
081bab21 | 912 | ret = bq27xxx_simple_value(di->charge_design_full, val); |
631c17ee | 913 | break; |
73c244a8 | 914 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
081bab21 | 915 | ret = bq27xxx_simple_value(di->cache.cycle_count, val); |
631c17ee PR |
916 | break; |
917 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
081bab21 | 918 | ret = bq27xxx_simple_value(di->cache.energy, val); |
631c17ee | 919 | break; |
9903e627 | 920 | case POWER_SUPPLY_PROP_POWER_AVG: |
081bab21 | 921 | ret = bq27xxx_simple_value(di->cache.power_avg, val); |
9903e627 SR |
922 | break; |
923 | case POWER_SUPPLY_PROP_HEALTH: | |
081bab21 | 924 | ret = bq27xxx_simple_value(di->cache.health, val); |
9903e627 | 925 | break; |
db04fc5c AD |
926 | case POWER_SUPPLY_PROP_MANUFACTURER: |
927 | val->strval = BQ27XXX_MANUFACTURER; | |
928 | break; | |
b996ad0e RG |
929 | default: |
930 | return -EINVAL; | |
931 | } | |
932 | ||
4e924a81 | 933 | return ret; |
b996ad0e RG |
934 | } |
935 | ||
081bab21 | 936 | static void bq27xxx_external_power_changed(struct power_supply *psy) |
740b755a | 937 | { |
081bab21 | 938 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
740b755a LPC |
939 | |
940 | cancel_delayed_work_sync(&di->work); | |
941 | schedule_delayed_work(&di->work, 0); | |
942 | } | |
943 | ||
703df6c0 | 944 | int bq27xxx_battery_setup(struct bq27xxx_device_info *di) |
b996ad0e | 945 | { |
297d716f KK |
946 | struct power_supply_desc *psy_desc; |
947 | struct power_supply_config psy_cfg = { .drv_data = di, }; | |
948 | ||
703df6c0 AD |
949 | INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll); |
950 | mutex_init(&di->lock); | |
951 | di->regs = bq27xxx_regs[di->chip]; | |
952 | ||
297d716f KK |
953 | psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL); |
954 | if (!psy_desc) | |
955 | return -ENOMEM; | |
a40402ef | 956 | |
703df6c0 | 957 | psy_desc->name = di->name; |
297d716f | 958 | psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; |
d74534c2 AD |
959 | psy_desc->properties = bq27xxx_battery_props[di->chip].props; |
960 | psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; | |
081bab21 AD |
961 | psy_desc->get_property = bq27xxx_battery_get_property; |
962 | psy_desc->external_power_changed = bq27xxx_external_power_changed; | |
740b755a | 963 | |
297d716f KK |
964 | di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg); |
965 | if (IS_ERR(di->bat)) { | |
703df6c0 AD |
966 | dev_err(di->dev, "failed to register battery\n"); |
967 | return PTR_ERR(di->bat); | |
a40402ef LPC |
968 | } |
969 | ||
970 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
971 | ||
081bab21 | 972 | bq27xxx_battery_update(di); |
297a533b | 973 | |
a40402ef | 974 | return 0; |
b996ad0e | 975 | } |
703df6c0 | 976 | EXPORT_SYMBOL_GPL(bq27xxx_battery_setup); |
b996ad0e | 977 | |
703df6c0 | 978 | void bq27xxx_battery_teardown(struct bq27xxx_device_info *di) |
740b755a | 979 | { |
8cfaaa81 | 980 | /* |
081bab21 AD |
981 | * power_supply_unregister call bq27xxx_battery_get_property which |
982 | * call bq27xxx_battery_poll. | |
983 | * Make sure that bq27xxx_battery_poll will not call | |
8cfaaa81 PR |
984 | * schedule_delayed_work again after unregister (which cause OOPS). |
985 | */ | |
986 | poll_interval = 0; | |
987 | ||
740b755a LPC |
988 | cancel_delayed_work_sync(&di->work); |
989 | ||
297d716f | 990 | power_supply_unregister(di->bat); |
740b755a LPC |
991 | |
992 | mutex_destroy(&di->lock); | |
993 | } | |
703df6c0 | 994 | EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown); |
7fb7ba58 | 995 | |
081bab21 AD |
996 | static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg, |
997 | bool single) | |
7fb7ba58 LPC |
998 | { |
999 | struct device *dev = di->dev; | |
081bab21 | 1000 | struct bq27xxx_platform_data *pdata = dev->platform_data; |
7fb7ba58 LPC |
1001 | unsigned int timeout = 3; |
1002 | int upper, lower; | |
1003 | int temp; | |
1004 | ||
1005 | if (!single) { | |
1006 | /* Make sure the value has not changed in between reading the | |
1007 | * lower and the upper part */ | |
1008 | upper = pdata->read(dev, reg + 1); | |
1009 | do { | |
1010 | temp = upper; | |
1011 | if (upper < 0) | |
1012 | return upper; | |
1013 | ||
1014 | lower = pdata->read(dev, reg); | |
1015 | if (lower < 0) | |
1016 | return lower; | |
1017 | ||
1018 | upper = pdata->read(dev, reg + 1); | |
1019 | } while (temp != upper && --timeout); | |
1020 | ||
1021 | if (timeout == 0) | |
1022 | return -EIO; | |
1023 | ||
297a533b | 1024 | return (upper << 8) | lower; |
7fb7ba58 | 1025 | } |
297a533b LPC |
1026 | |
1027 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
1028 | } |
1029 | ||
081bab21 | 1030 | static int bq27xxx_battery_platform_probe(struct platform_device *pdev) |
7fb7ba58 | 1031 | { |
081bab21 AD |
1032 | struct bq27xxx_device_info *di; |
1033 | struct bq27xxx_platform_data *pdata = pdev->dev.platform_data; | |
7fb7ba58 LPC |
1034 | |
1035 | if (!pdata) { | |
1036 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
1037 | return -EINVAL; | |
1038 | } | |
1039 | ||
1040 | if (!pdata->read) { | |
1041 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
1042 | return -EINVAL; | |
1043 | } | |
1044 | ||
424cfde4 AD |
1045 | if (!pdata->chip) { |
1046 | dev_err(&pdev->dev, "no device supplied\n"); | |
1047 | return -EINVAL; | |
1048 | } | |
1049 | ||
1cb82fdb | 1050 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
6d0a1815 | 1051 | if (!di) |
7fb7ba58 | 1052 | return -ENOMEM; |
7fb7ba58 LPC |
1053 | |
1054 | platform_set_drvdata(pdev, di); | |
1055 | ||
1056 | di->dev = &pdev->dev; | |
424cfde4 | 1057 | di->chip = pdata->chip; |
703df6c0 AD |
1058 | di->name = pdata->name ?: dev_name(&pdev->dev); |
1059 | di->bus.read = bq27xxx_battery_platform_read; | |
7fb7ba58 | 1060 | |
703df6c0 | 1061 | return bq27xxx_battery_setup(di); |
7fb7ba58 LPC |
1062 | } |
1063 | ||
081bab21 | 1064 | static int bq27xxx_battery_platform_remove(struct platform_device *pdev) |
7fb7ba58 | 1065 | { |
081bab21 | 1066 | struct bq27xxx_device_info *di = platform_get_drvdata(pdev); |
7fb7ba58 | 1067 | |
703df6c0 | 1068 | bq27xxx_battery_teardown(di); |
740b755a | 1069 | |
7fb7ba58 LPC |
1070 | return 0; |
1071 | } | |
1072 | ||
703df6c0 AD |
1073 | static const struct platform_device_id bq27xxx_battery_platform_id_table[] = { |
1074 | { "bq27000-battery", }, | |
1075 | { /* sentinel */ } | |
1076 | }; | |
1077 | MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table); | |
1078 | ||
7df3a746 PR |
1079 | #ifdef CONFIG_OF |
1080 | static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = { | |
1081 | { .compatible = "ti,bq27000" }, | |
1082 | {}, | |
1083 | }; | |
1084 | MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table); | |
1085 | #endif | |
1086 | ||
081bab21 AD |
1087 | static struct platform_driver bq27xxx_battery_platform_driver = { |
1088 | .probe = bq27xxx_battery_platform_probe, | |
1089 | .remove = bq27xxx_battery_platform_remove, | |
7fb7ba58 LPC |
1090 | .driver = { |
1091 | .name = "bq27000-battery", | |
7df3a746 | 1092 | .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table), |
7fb7ba58 | 1093 | }, |
703df6c0 | 1094 | .id_table = bq27xxx_battery_platform_id_table, |
7fb7ba58 | 1095 | }; |
703df6c0 | 1096 | module_platform_driver(bq27xxx_battery_platform_driver); |
8ebb7e9c | 1097 | |
7df3a746 PR |
1098 | MODULE_ALIAS("platform:bq27000-battery"); |
1099 | ||
b996ad0e | 1100 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
081bab21 | 1101 | MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
b996ad0e | 1102 | MODULE_LICENSE("GPL"); |