Commit | Line | Data |
---|---|---|
b996ad0e | 1 | /* |
081bab21 | 2 | * BQ27xxx battery driver |
b996ad0e RG |
3 | * |
4 | * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> | |
5 | * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it> | |
7fb7ba58 | 6 | * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de> |
73c244a8 | 7 | * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com> |
b996ad0e RG |
8 | * |
9 | * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc. | |
10 | * | |
11 | * This package is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | * | |
631c17ee | 19 | * Datasheets: |
d74534c2 AD |
20 | * http://www.ti.com/product/bq27000 |
21 | * http://www.ti.com/product/bq27200 | |
22 | * http://www.ti.com/product/bq27010 | |
23 | * http://www.ti.com/product/bq27210 | |
24 | * http://www.ti.com/product/bq27500 | |
25 | * http://www.ti.com/product/bq27510-g3 | |
26 | * http://www.ti.com/product/bq27520-g4 | |
27 | * http://www.ti.com/product/bq27530-g1 | |
28 | * http://www.ti.com/product/bq27531-g1 | |
29 | * http://www.ti.com/product/bq27541-g1 | |
30 | * http://www.ti.com/product/bq27542-g1 | |
31 | * http://www.ti.com/product/bq27546-g1 | |
32 | * http://www.ti.com/product/bq27742-g1 | |
33 | * http://www.ti.com/product/bq27545-g1 | |
34 | * http://www.ti.com/product/bq27421-g1 | |
a66f59ba | 35 | * http://www.ti.com/product/bq27425-g1 |
d74534c2 AD |
36 | * http://www.ti.com/product/bq27411-g1 |
37 | * http://www.ti.com/product/bq27621-g1 | |
631c17ee PR |
38 | */ |
39 | ||
1cb82fdb | 40 | #include <linux/device.h> |
b996ad0e RG |
41 | #include <linux/module.h> |
42 | #include <linux/param.h> | |
43 | #include <linux/jiffies.h> | |
44 | #include <linux/workqueue.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/platform_device.h> | |
47 | #include <linux/power_supply.h> | |
5a0e3ad6 | 48 | #include <linux/slab.h> |
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 | */ | |
85 | enum bq27xxx_reg_index { | |
86 | BQ27XXX_REG_CTRL = 0, /* Control */ | |
87 | BQ27XXX_REG_TEMP, /* Temperature */ | |
88 | BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ | |
89 | BQ27XXX_REG_VOLT, /* Voltage */ | |
90 | BQ27XXX_REG_AI, /* Average Current */ | |
91 | BQ27XXX_REG_FLAGS, /* Flags */ | |
92 | BQ27XXX_REG_TTE, /* Time-to-Empty */ | |
93 | BQ27XXX_REG_TTF, /* Time-to-Full */ | |
94 | BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ | |
95 | BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ | |
96 | BQ27XXX_REG_NAC, /* Nominal Available Capacity */ | |
97 | BQ27XXX_REG_FCC, /* Full Charge Capacity */ | |
98 | BQ27XXX_REG_CYCT, /* Cycle Count */ | |
99 | BQ27XXX_REG_AE, /* Available Energy */ | |
100 | BQ27XXX_REG_SOC, /* State-of-Charge */ | |
101 | BQ27XXX_REG_DCAP, /* Design Capacity */ | |
102 | BQ27XXX_REG_AP, /* Average Power */ | |
103 | }; | |
104 | ||
d74534c2 AD |
105 | /* Register mappings */ |
106 | static u8 bq27000_regs[] = { | |
5630b433 AD |
107 | [BQ27XXX_REG_CTRL] = 0x00, |
108 | [BQ27XXX_REG_TEMP] = 0x06, | |
109 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
110 | [BQ27XXX_REG_VOLT] = 0x08, | |
111 | [BQ27XXX_REG_AI] = 0x14, | |
112 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
113 | [BQ27XXX_REG_TTE] = 0x16, | |
114 | [BQ27XXX_REG_TTF] = 0x18, | |
115 | [BQ27XXX_REG_TTES] = 0x1c, | |
116 | [BQ27XXX_REG_TTECP] = 0x26, | |
117 | [BQ27XXX_REG_NAC] = 0x0c, | |
118 | [BQ27XXX_REG_FCC] = 0x12, | |
119 | [BQ27XXX_REG_CYCT] = 0x2a, | |
120 | [BQ27XXX_REG_AE] = 0x22, | |
121 | [BQ27XXX_REG_SOC] = 0x0b, | |
122 | [BQ27XXX_REG_DCAP] = 0x76, | |
123 | [BQ27XXX_REG_AP] = 0x24, | |
d74534c2 AD |
124 | }; |
125 | ||
126 | static u8 bq27010_regs[] = { | |
5630b433 AD |
127 | [BQ27XXX_REG_CTRL] = 0x00, |
128 | [BQ27XXX_REG_TEMP] = 0x06, | |
129 | [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, | |
130 | [BQ27XXX_REG_VOLT] = 0x08, | |
131 | [BQ27XXX_REG_AI] = 0x14, | |
132 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
133 | [BQ27XXX_REG_TTE] = 0x16, | |
134 | [BQ27XXX_REG_TTF] = 0x18, | |
135 | [BQ27XXX_REG_TTES] = 0x1c, | |
136 | [BQ27XXX_REG_TTECP] = 0x26, | |
137 | [BQ27XXX_REG_NAC] = 0x0c, | |
138 | [BQ27XXX_REG_FCC] = 0x12, | |
139 | [BQ27XXX_REG_CYCT] = 0x2a, | |
140 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
141 | [BQ27XXX_REG_SOC] = 0x0b, | |
142 | [BQ27XXX_REG_DCAP] = 0x76, | |
143 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
d74534c2 AD |
144 | }; |
145 | ||
146 | static u8 bq27500_regs[] = { | |
5630b433 AD |
147 | [BQ27XXX_REG_CTRL] = 0x00, |
148 | [BQ27XXX_REG_TEMP] = 0x06, | |
149 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
150 | [BQ27XXX_REG_VOLT] = 0x08, | |
151 | [BQ27XXX_REG_AI] = 0x14, | |
152 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
153 | [BQ27XXX_REG_TTE] = 0x16, | |
154 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
155 | [BQ27XXX_REG_TTES] = 0x1a, | |
156 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
157 | [BQ27XXX_REG_NAC] = 0x0c, | |
158 | [BQ27XXX_REG_FCC] = 0x12, | |
159 | [BQ27XXX_REG_CYCT] = 0x2a, | |
160 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
161 | [BQ27XXX_REG_SOC] = 0x2c, | |
162 | [BQ27XXX_REG_DCAP] = 0x3c, | |
163 | [BQ27XXX_REG_AP] = INVALID_REG_ADDR, | |
b996ad0e RG |
164 | }; |
165 | ||
d74534c2 | 166 | static u8 bq27530_regs[] = { |
5630b433 AD |
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, | |
d74534c2 AD |
184 | }; |
185 | ||
186 | static u8 bq27541_regs[] = { | |
5630b433 AD |
187 | [BQ27XXX_REG_CTRL] = 0x00, |
188 | [BQ27XXX_REG_TEMP] = 0x06, | |
189 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
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] = 0x3c, | |
203 | [BQ27XXX_REG_AP] = 0x24, | |
d74534c2 AD |
204 | }; |
205 | ||
206 | static u8 bq27545_regs[] = { | |
5630b433 AD |
207 | [BQ27XXX_REG_CTRL] = 0x00, |
208 | [BQ27XXX_REG_TEMP] = 0x06, | |
209 | [BQ27XXX_REG_INT_TEMP] = 0x28, | |
210 | [BQ27XXX_REG_VOLT] = 0x08, | |
211 | [BQ27XXX_REG_AI] = 0x14, | |
212 | [BQ27XXX_REG_FLAGS] = 0x0a, | |
213 | [BQ27XXX_REG_TTE] = 0x16, | |
214 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
215 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
216 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
217 | [BQ27XXX_REG_NAC] = 0x0c, | |
218 | [BQ27XXX_REG_FCC] = 0x12, | |
219 | [BQ27XXX_REG_CYCT] = 0x2a, | |
220 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
221 | [BQ27XXX_REG_SOC] = 0x2c, | |
222 | [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, | |
223 | [BQ27XXX_REG_AP] = 0x24, | |
d74534c2 AD |
224 | }; |
225 | ||
226 | static u8 bq27421_regs[] = { | |
5630b433 AD |
227 | [BQ27XXX_REG_CTRL] = 0x00, |
228 | [BQ27XXX_REG_TEMP] = 0x02, | |
229 | [BQ27XXX_REG_INT_TEMP] = 0x1e, | |
230 | [BQ27XXX_REG_VOLT] = 0x04, | |
231 | [BQ27XXX_REG_AI] = 0x10, | |
232 | [BQ27XXX_REG_FLAGS] = 0x06, | |
233 | [BQ27XXX_REG_TTE] = INVALID_REG_ADDR, | |
234 | [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, | |
235 | [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, | |
236 | [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, | |
237 | [BQ27XXX_REG_NAC] = 0x08, | |
238 | [BQ27XXX_REG_FCC] = 0x0e, | |
239 | [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR, | |
240 | [BQ27XXX_REG_AE] = INVALID_REG_ADDR, | |
241 | [BQ27XXX_REG_SOC] = 0x1c, | |
242 | [BQ27XXX_REG_DCAP] = 0x3c, | |
243 | [BQ27XXX_REG_AP] = 0x18, | |
d74534c2 AD |
244 | }; |
245 | ||
246 | static u8 *bq27xxx_regs[] = { | |
247 | [BQ27000] = bq27000_regs, | |
248 | [BQ27010] = bq27010_regs, | |
249 | [BQ27500] = bq27500_regs, | |
250 | [BQ27530] = bq27530_regs, | |
251 | [BQ27541] = bq27541_regs, | |
252 | [BQ27545] = bq27545_regs, | |
253 | [BQ27421] = bq27421_regs, | |
254 | }; | |
255 | ||
256 | static enum power_supply_property bq27000_battery_props[] = { | |
4e924a81 | 257 | POWER_SUPPLY_PROP_STATUS, |
b996ad0e RG |
258 | POWER_SUPPLY_PROP_PRESENT, |
259 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
260 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
261 | POWER_SUPPLY_PROP_CAPACITY, | |
d66bab3f | 262 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
b996ad0e | 263 | POWER_SUPPLY_PROP_TEMP, |
4e924a81 GI |
264 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
265 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
266 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
5661f334 | 267 | POWER_SUPPLY_PROP_TECHNOLOGY, |
631c17ee PR |
268 | POWER_SUPPLY_PROP_CHARGE_FULL, |
269 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
270 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
73c244a8 | 271 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
631c17ee | 272 | POWER_SUPPLY_PROP_ENERGY_NOW, |
9903e627 SR |
273 | POWER_SUPPLY_PROP_POWER_AVG, |
274 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 275 | POWER_SUPPLY_PROP_MANUFACTURER, |
b996ad0e RG |
276 | }; |
277 | ||
d74534c2 | 278 | static enum power_supply_property bq27010_battery_props[] = { |
a66f59ba SG |
279 | POWER_SUPPLY_PROP_STATUS, |
280 | POWER_SUPPLY_PROP_PRESENT, | |
281 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
282 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
283 | POWER_SUPPLY_PROP_CAPACITY, | |
284 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
285 | POWER_SUPPLY_PROP_TEMP, | |
d74534c2 AD |
286 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
287 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
288 | POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, | |
a66f59ba SG |
289 | POWER_SUPPLY_PROP_TECHNOLOGY, |
290 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
291 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
292 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
d74534c2 AD |
293 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
294 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 295 | POWER_SUPPLY_PROP_MANUFACTURER, |
a66f59ba SG |
296 | }; |
297 | ||
d74534c2 | 298 | static enum power_supply_property bq27500_battery_props[] = { |
628ef02c PV |
299 | POWER_SUPPLY_PROP_STATUS, |
300 | POWER_SUPPLY_PROP_PRESENT, | |
301 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
302 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
303 | POWER_SUPPLY_PROP_CAPACITY, | |
304 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
305 | POWER_SUPPLY_PROP_TEMP, | |
306 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
307 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
308 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
309 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
310 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
311 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
d74534c2 AD |
312 | POWER_SUPPLY_PROP_HEALTH, |
313 | POWER_SUPPLY_PROP_MANUFACTURER, | |
314 | }; | |
315 | ||
316 | static enum power_supply_property bq27530_battery_props[] = { | |
317 | POWER_SUPPLY_PROP_STATUS, | |
318 | POWER_SUPPLY_PROP_PRESENT, | |
319 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
320 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
321 | POWER_SUPPLY_PROP_CAPACITY, | |
322 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
323 | POWER_SUPPLY_PROP_TEMP, | |
324 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
325 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
326 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
327 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
628ef02c PV |
328 | POWER_SUPPLY_PROP_POWER_AVG, |
329 | POWER_SUPPLY_PROP_HEALTH, | |
d74534c2 | 330 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
db04fc5c | 331 | POWER_SUPPLY_PROP_MANUFACTURER, |
628ef02c PV |
332 | }; |
333 | ||
d74534c2 | 334 | static enum power_supply_property bq27541_battery_props[] = { |
f46bf82e AB |
335 | POWER_SUPPLY_PROP_STATUS, |
336 | POWER_SUPPLY_PROP_PRESENT, | |
337 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
338 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
339 | POWER_SUPPLY_PROP_CAPACITY, | |
340 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
341 | POWER_SUPPLY_PROP_TEMP, | |
342 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
343 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
344 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
345 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
346 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
347 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
348 | POWER_SUPPLY_PROP_POWER_AVG, | |
349 | POWER_SUPPLY_PROP_HEALTH, | |
db04fc5c | 350 | POWER_SUPPLY_PROP_MANUFACTURER, |
f46bf82e AB |
351 | }; |
352 | ||
d74534c2 AD |
353 | static enum power_supply_property bq27545_battery_props[] = { |
354 | POWER_SUPPLY_PROP_STATUS, | |
355 | POWER_SUPPLY_PROP_PRESENT, | |
356 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
357 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
358 | POWER_SUPPLY_PROP_CAPACITY, | |
359 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
360 | POWER_SUPPLY_PROP_TEMP, | |
361 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, | |
362 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
363 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
364 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
365 | POWER_SUPPLY_PROP_HEALTH, | |
366 | POWER_SUPPLY_PROP_CYCLE_COUNT, | |
367 | POWER_SUPPLY_PROP_POWER_AVG, | |
368 | POWER_SUPPLY_PROP_MANUFACTURER, | |
369 | }; | |
370 | ||
371 | static enum power_supply_property bq27421_battery_props[] = { | |
372 | POWER_SUPPLY_PROP_STATUS, | |
373 | POWER_SUPPLY_PROP_PRESENT, | |
374 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
375 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
376 | POWER_SUPPLY_PROP_CAPACITY, | |
377 | POWER_SUPPLY_PROP_CAPACITY_LEVEL, | |
378 | POWER_SUPPLY_PROP_TEMP, | |
379 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
380 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
381 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
382 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
383 | POWER_SUPPLY_PROP_MANUFACTURER, | |
384 | }; | |
385 | ||
386 | #define BQ27XXX_PROP(_id, _prop) \ | |
387 | [_id] = { \ | |
388 | .props = _prop, \ | |
389 | .size = ARRAY_SIZE(_prop), \ | |
390 | } | |
391 | ||
392 | static struct { | |
393 | enum power_supply_property *props; | |
394 | size_t size; | |
395 | } bq27xxx_battery_props[] = { | |
396 | BQ27XXX_PROP(BQ27000, bq27000_battery_props), | |
397 | BQ27XXX_PROP(BQ27010, bq27010_battery_props), | |
398 | BQ27XXX_PROP(BQ27500, bq27500_battery_props), | |
399 | BQ27XXX_PROP(BQ27530, bq27530_battery_props), | |
400 | BQ27XXX_PROP(BQ27541, bq27541_battery_props), | |
401 | BQ27XXX_PROP(BQ27545, bq27545_battery_props), | |
402 | BQ27XXX_PROP(BQ27421, bq27421_battery_props), | |
403 | }; | |
404 | ||
740b755a LPC |
405 | static unsigned int poll_interval = 360; |
406 | module_param(poll_interval, uint, 0644); | |
6d0a1815 AD |
407 | MODULE_PARM_DESC(poll_interval, |
408 | "battery poll interval in seconds - 0 disables polling"); | |
740b755a | 409 | |
b996ad0e | 410 | /* |
081bab21 | 411 | * Common code for BQ27xxx devices |
b996ad0e RG |
412 | */ |
413 | ||
d74534c2 | 414 | static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, |
ce33edfa | 415 | bool single) |
b996ad0e | 416 | { |
d74534c2 AD |
417 | /* Reports EINVAL for invalid/missing registers */ |
418 | if (!di || di->regs[reg_index] == INVALID_REG_ADDR) | |
419 | return -EINVAL; | |
b996ad0e | 420 | |
d74534c2 | 421 | return di->bus.read(di, di->regs[reg_index], single); |
a66f59ba SG |
422 | } |
423 | ||
b996ad0e | 424 | /* |
c5709032 | 425 | * Return the battery State-of-Charge |
b996ad0e RG |
426 | * Or < 0 if something fails. |
427 | */ | |
c5709032 | 428 | static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) |
b996ad0e | 429 | { |
c5709032 | 430 | int soc; |
b996ad0e | 431 | |
549d7b31 NS |
432 | if (di->chip == BQ27000 || di->chip == BQ27010) |
433 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, true); | |
434 | else | |
435 | soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); | |
297a533b | 436 | |
c5709032 AD |
437 | if (soc < 0) |
438 | dev_dbg(di->dev, "error reading State-of-Charge\n"); | |
297a533b | 439 | |
c5709032 | 440 | return soc; |
b996ad0e RG |
441 | } |
442 | ||
631c17ee PR |
443 | /* |
444 | * Return a battery charge value in µAh | |
445 | * Or < 0 if something fails. | |
446 | */ | |
081bab21 | 447 | static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) |
631c17ee PR |
448 | { |
449 | int charge; | |
450 | ||
081bab21 | 451 | charge = bq27xxx_read(di, reg, false); |
631c17ee | 452 | if (charge < 0) { |
c6cd4f26 PR |
453 | dev_dbg(di->dev, "error reading charge register %02x: %d\n", |
454 | reg, charge); | |
631c17ee PR |
455 | return charge; |
456 | } | |
457 | ||
d74534c2 AD |
458 | if (di->chip == BQ27000 || di->chip == BQ27010) |
459 | charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; | |
631c17ee | 460 | else |
d74534c2 | 461 | charge *= 1000; |
631c17ee PR |
462 | |
463 | return charge; | |
464 | } | |
465 | ||
466 | /* | |
c5709032 | 467 | * Return the battery Nominal available capacity in µAh |
631c17ee PR |
468 | * Or < 0 if something fails. |
469 | */ | |
081bab21 | 470 | static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) |
631c17ee | 471 | { |
e59ec4a1 | 472 | int flags; |
e59ec4a1 | 473 | |
d74534c2 AD |
474 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
475 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); | |
476 | if (flags >= 0 && (flags & BQ27000_FLAG_CI)) | |
477 | return -ENODATA; | |
478 | } | |
e59ec4a1 | 479 | |
d74534c2 | 480 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); |
631c17ee PR |
481 | } |
482 | ||
483 | /* | |
d74534c2 | 484 | * Return the battery Full Charge Capacity in µAh |
631c17ee PR |
485 | * Or < 0 if something fails. |
486 | */ | |
d74534c2 | 487 | static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) |
631c17ee | 488 | { |
d74534c2 | 489 | return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); |
631c17ee PR |
490 | } |
491 | ||
492 | /* | |
d74534c2 | 493 | * Return the Design Capacity in µAh |
631c17ee PR |
494 | * Or < 0 if something fails. |
495 | */ | |
d74534c2 | 496 | static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) |
631c17ee | 497 | { |
d74534c2 | 498 | int dcap; |
631c17ee | 499 | |
549d7b31 NS |
500 | if (di->chip == BQ27000 || di->chip == BQ27010) |
501 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, true); | |
502 | else | |
503 | dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); | |
631c17ee | 504 | |
d74534c2 | 505 | if (dcap < 0) { |
c6cd4f26 | 506 | dev_dbg(di->dev, "error reading initial last measured discharge\n"); |
d74534c2 | 507 | return dcap; |
631c17ee PR |
508 | } |
509 | ||
d74534c2 | 510 | if (di->chip == BQ27000 || di->chip == BQ27010) |
549d7b31 | 511 | dcap = (dcap << 8) * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
631c17ee | 512 | else |
d74534c2 | 513 | dcap *= 1000; |
631c17ee | 514 | |
d74534c2 | 515 | return dcap; |
631c17ee PR |
516 | } |
517 | ||
a8f6bd23 PR |
518 | /* |
519 | * Return the battery Available energy in µWh | |
520 | * Or < 0 if something fails. | |
521 | */ | |
081bab21 | 522 | static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) |
a8f6bd23 PR |
523 | { |
524 | int ae; | |
525 | ||
d74534c2 | 526 | ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); |
a8f6bd23 | 527 | if (ae < 0) { |
c6cd4f26 | 528 | dev_dbg(di->dev, "error reading available energy\n"); |
a8f6bd23 PR |
529 | return ae; |
530 | } | |
531 | ||
d74534c2 AD |
532 | if (di->chip == BQ27000 || di->chip == BQ27010) |
533 | ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; | |
a8f6bd23 | 534 | else |
d74534c2 | 535 | ae *= 1000; |
a8f6bd23 PR |
536 | |
537 | return ae; | |
538 | } | |
539 | ||
d149e98e | 540 | /* |
5dc3443e | 541 | * Return the battery temperature in tenths of degree Kelvin |
d149e98e PR |
542 | * Or < 0 if something fails. |
543 | */ | |
081bab21 | 544 | static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) |
d149e98e PR |
545 | { |
546 | int temp; | |
547 | ||
d74534c2 | 548 | temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); |
d149e98e PR |
549 | if (temp < 0) { |
550 | dev_err(di->dev, "error reading temperature\n"); | |
551 | return temp; | |
552 | } | |
553 | ||
d74534c2 | 554 | if (di->chip == BQ27000 || di->chip == BQ27010) |
5dc3443e | 555 | temp = 5 * temp / 2; |
d149e98e PR |
556 | |
557 | return temp; | |
558 | } | |
559 | ||
631c17ee PR |
560 | /* |
561 | * Return the battery Cycle count total | |
562 | * Or < 0 if something fails. | |
563 | */ | |
081bab21 | 564 | static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) |
631c17ee PR |
565 | { |
566 | int cyct; | |
567 | ||
d74534c2 | 568 | cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); |
631c17ee PR |
569 | if (cyct < 0) |
570 | dev_err(di->dev, "error reading cycle count total\n"); | |
571 | ||
572 | return cyct; | |
573 | } | |
574 | ||
b996ad0e | 575 | /* |
297a533b LPC |
576 | * Read a time register. |
577 | * Return < 0 if something fails. | |
b996ad0e | 578 | */ |
081bab21 | 579 | static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) |
b996ad0e | 580 | { |
297a533b | 581 | int tval; |
b996ad0e | 582 | |
081bab21 | 583 | tval = bq27xxx_read(di, reg, false); |
297a533b | 584 | if (tval < 0) { |
c6cd4f26 PR |
585 | dev_dbg(di->dev, "error reading time register %02x: %d\n", |
586 | reg, tval); | |
297a533b | 587 | return tval; |
b996ad0e RG |
588 | } |
589 | ||
297a533b LPC |
590 | if (tval == 65535) |
591 | return -ENODATA; | |
592 | ||
593 | return tval * 60; | |
594 | } | |
595 | ||
9903e627 | 596 | /* |
c5709032 | 597 | * Read an average power register. |
9903e627 SR |
598 | * Return < 0 if something fails. |
599 | */ | |
d74534c2 | 600 | static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) |
9903e627 SR |
601 | { |
602 | int tval; | |
603 | ||
d74534c2 | 604 | tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); |
9903e627 | 605 | if (tval < 0) { |
d74534c2 AD |
606 | dev_err(di->dev, "error reading average power register %02x: %d\n", |
607 | BQ27XXX_REG_AP, tval); | |
9903e627 SR |
608 | return tval; |
609 | } | |
610 | ||
d74534c2 AD |
611 | if (di->chip == BQ27000 || di->chip == BQ27010) |
612 | return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; | |
613 | else | |
9903e627 | 614 | return tval; |
d74534c2 AD |
615 | } |
616 | ||
617 | /* | |
618 | * Returns true if a battery over temperature condition is detected | |
619 | */ | |
74aab849 | 620 | static bool bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) |
d74534c2 | 621 | { |
74aab849 | 622 | if (di->chip == BQ27500 || di->chip == BQ27541 || di->chip == BQ27545) |
d74534c2 | 623 | return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); |
74aab849 AD |
624 | if (di->chip == BQ27530 || di->chip == BQ27421) |
625 | return flags & BQ27XXX_FLAG_OT; | |
626 | ||
627 | return false; | |
628 | } | |
629 | ||
630 | /* | |
631 | * Returns true if a battery under temperature condition is detected | |
632 | */ | |
633 | static bool bq27xxx_battery_undertemp(struct bq27xxx_device_info *di, u16 flags) | |
634 | { | |
635 | if (di->chip == BQ27530 || di->chip == BQ27421) | |
636 | return flags & BQ27XXX_FLAG_UT; | |
637 | ||
638 | return false; | |
639 | } | |
640 | ||
641 | /* | |
642 | * Returns true if a low state of charge condition is detected | |
643 | */ | |
644 | static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags) | |
645 | { | |
646 | if (di->chip == BQ27000 || di->chip == BQ27010) | |
647 | return flags & (BQ27000_FLAG_EDV1 | BQ27000_FLAG_EDVF); | |
9903e627 | 648 | else |
74aab849 | 649 | return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF); |
9903e627 SR |
650 | } |
651 | ||
652 | /* | |
653 | * Read flag register. | |
654 | * Return < 0 if something fails. | |
655 | */ | |
081bab21 | 656 | static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) |
9903e627 | 657 | { |
2edd69a8 | 658 | int flags; |
9903e627 | 659 | |
74aab849 AD |
660 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); |
661 | if (flags < 0) { | |
662 | dev_err(di->dev, "error reading flag register:%d\n", flags); | |
663 | return flags; | |
9903e627 SR |
664 | } |
665 | ||
74aab849 AD |
666 | /* Unlikely but important to return first */ |
667 | if (unlikely(bq27xxx_battery_overtemp(di, flags))) | |
668 | return POWER_SUPPLY_HEALTH_OVERHEAT; | |
669 | if (unlikely(bq27xxx_battery_undertemp(di, flags))) | |
670 | return POWER_SUPPLY_HEALTH_COLD; | |
671 | if (unlikely(bq27xxx_battery_dead(di, flags))) | |
672 | return POWER_SUPPLY_HEALTH_DEAD; | |
9903e627 | 673 | |
74aab849 | 674 | return POWER_SUPPLY_HEALTH_GOOD; |
9903e627 SR |
675 | } |
676 | ||
703df6c0 | 677 | void bq27xxx_battery_update(struct bq27xxx_device_info *di) |
297a533b | 678 | { |
081bab21 | 679 | struct bq27xxx_reg_cache cache = {0, }; |
d74534c2 AD |
680 | bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; |
681 | bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; | |
297a533b | 682 | |
d74534c2 | 683 | cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); |
3dd843e1 | 684 | if ((cache.flags & 0xff) == 0xff) |
d74534c2 | 685 | cache.flags = -1; /* read error */ |
297a533b | 686 | if (cache.flags >= 0) { |
d74534c2 AD |
687 | cache.temperature = bq27xxx_battery_read_temperature(di); |
688 | if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { | |
1f94b256 | 689 | dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n"); |
4b226c2c | 690 | cache.capacity = -ENODATA; |
a8f6bd23 | 691 | cache.energy = -ENODATA; |
4b226c2c PR |
692 | cache.time_to_empty = -ENODATA; |
693 | cache.time_to_empty_avg = -ENODATA; | |
694 | cache.time_to_full = -ENODATA; | |
695 | cache.charge_full = -ENODATA; | |
9903e627 | 696 | cache.health = -ENODATA; |
4b226c2c | 697 | } else { |
d74534c2 AD |
698 | if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) |
699 | cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); | |
700 | if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) | |
701 | cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); | |
702 | if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) | |
703 | cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); | |
704 | cache.charge_full = bq27xxx_battery_read_fcc(di); | |
c5709032 | 705 | cache.capacity = bq27xxx_battery_read_soc(di); |
d74534c2 | 706 | if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) |
081bab21 | 707 | cache.energy = bq27xxx_battery_read_energy(di); |
081bab21 | 708 | cache.health = bq27xxx_battery_read_health(di); |
4b226c2c | 709 | } |
d74534c2 | 710 | if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) |
081bab21 | 711 | cache.cycle_count = bq27xxx_battery_read_cyct(di); |
d74534c2 AD |
712 | if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) |
713 | cache.power_avg = bq27xxx_battery_read_pwr_avg(di); | |
297a533b | 714 | |
631c17ee PR |
715 | /* We only have to read charge design full once */ |
716 | if (di->charge_design_full <= 0) | |
d74534c2 | 717 | di->charge_design_full = bq27xxx_battery_read_dcap(di); |
297a533b LPC |
718 | } |
719 | ||
90f04a28 | 720 | if (di->cache.capacity != cache.capacity) |
297d716f | 721 | power_supply_changed(di->bat); |
90f04a28 PV |
722 | |
723 | if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) | |
724 | di->cache = cache; | |
297a533b LPC |
725 | |
726 | di->last_update = jiffies; | |
727 | } | |
703df6c0 | 728 | EXPORT_SYMBOL_GPL(bq27xxx_battery_update); |
297a533b | 729 | |
081bab21 | 730 | static void bq27xxx_battery_poll(struct work_struct *work) |
740b755a | 731 | { |
081bab21 | 732 | struct bq27xxx_device_info *di = |
d74534c2 AD |
733 | container_of(work, struct bq27xxx_device_info, |
734 | work.work); | |
740b755a | 735 | |
081bab21 | 736 | bq27xxx_battery_update(di); |
740b755a LPC |
737 | |
738 | if (poll_interval > 0) { | |
739 | /* The timer does not have to be accurate. */ | |
740 | set_timer_slack(&di->work.timer, poll_interval * HZ / 4); | |
741 | schedule_delayed_work(&di->work, poll_interval * HZ); | |
742 | } | |
743 | } | |
744 | ||
b996ad0e | 745 | /* |
bf7d4140 | 746 | * Return the battery average current in µA |
b996ad0e RG |
747 | * Note that current can be negative signed as well |
748 | * Or 0 if something fails. | |
749 | */ | |
081bab21 | 750 | static int bq27xxx_battery_current(struct bq27xxx_device_info *di, |
ce33edfa | 751 | union power_supply_propval *val) |
b996ad0e | 752 | { |
297a533b | 753 | int curr; |
b68f6216 | 754 | int flags; |
b996ad0e | 755 | |
d74534c2 | 756 | curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); |
c6cd4f26 PR |
757 | if (curr < 0) { |
758 | dev_err(di->dev, "error reading current\n"); | |
297a533b | 759 | return curr; |
c6cd4f26 | 760 | } |
e20908d9 | 761 | |
d74534c2 AD |
762 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
763 | flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); | |
b68f6216 | 764 | if (flags & BQ27000_FLAG_CHGS) { |
e20908d9 | 765 | dev_dbg(di->dev, "negative current!\n"); |
afbc74fd | 766 | curr = -curr; |
e20908d9 | 767 | } |
b996ad0e | 768 | |
d74534c2 AD |
769 | val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; |
770 | } else { | |
771 | /* Other gauges return signed value */ | |
772 | val->intval = (int)((s16)curr) * 1000; | |
b996ad0e RG |
773 | } |
774 | ||
297a533b | 775 | return 0; |
b996ad0e RG |
776 | } |
777 | ||
081bab21 | 778 | static int bq27xxx_battery_status(struct bq27xxx_device_info *di, |
ce33edfa | 779 | union power_supply_propval *val) |
4e924a81 | 780 | { |
4e924a81 | 781 | int status; |
4e924a81 | 782 | |
d74534c2 | 783 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
c1b9ab67 LPC |
784 | if (di->cache.flags & BQ27000_FLAG_FC) |
785 | status = POWER_SUPPLY_STATUS_FULL; | |
786 | else if (di->cache.flags & BQ27000_FLAG_CHGS) | |
4e924a81 | 787 | status = POWER_SUPPLY_STATUS_CHARGING; |
297d716f | 788 | else if (power_supply_am_i_supplied(di->bat)) |
c1b9ab67 | 789 | status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
4e924a81 GI |
790 | else |
791 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
d74534c2 AD |
792 | } else { |
793 | if (di->cache.flags & BQ27XXX_FLAG_FC) | |
794 | status = POWER_SUPPLY_STATUS_FULL; | |
795 | else if (di->cache.flags & BQ27XXX_FLAG_DSC) | |
796 | status = POWER_SUPPLY_STATUS_DISCHARGING; | |
797 | else | |
798 | status = POWER_SUPPLY_STATUS_CHARGING; | |
4e924a81 GI |
799 | } |
800 | ||
801 | val->intval = status; | |
297a533b | 802 | |
4e924a81 GI |
803 | return 0; |
804 | } | |
805 | ||
081bab21 | 806 | static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, |
ce33edfa | 807 | union power_supply_propval *val) |
d66bab3f PR |
808 | { |
809 | int level; | |
810 | ||
d74534c2 AD |
811 | if (di->chip == BQ27000 || di->chip == BQ27010) { |
812 | if (di->cache.flags & BQ27000_FLAG_FC) | |
d66bab3f | 813 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 814 | else if (di->cache.flags & BQ27000_FLAG_EDV1) |
d66bab3f | 815 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 816 | else if (di->cache.flags & BQ27000_FLAG_EDVF) |
d66bab3f PR |
817 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
818 | else | |
819 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
820 | } else { | |
d74534c2 | 821 | if (di->cache.flags & BQ27XXX_FLAG_FC) |
d66bab3f | 822 | level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
d74534c2 | 823 | else if (di->cache.flags & BQ27XXX_FLAG_SOC1) |
d66bab3f | 824 | level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; |
d74534c2 | 825 | else if (di->cache.flags & BQ27XXX_FLAG_SOCF) |
d66bab3f PR |
826 | level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
827 | else | |
828 | level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; | |
829 | } | |
830 | ||
831 | val->intval = level; | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
4e924a81 | 836 | /* |
91fe4d50 | 837 | * Return the battery Voltage in millivolts |
297a533b | 838 | * Or < 0 if something fails. |
4e924a81 | 839 | */ |
081bab21 | 840 | static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, |
ce33edfa | 841 | union power_supply_propval *val) |
4e924a81 | 842 | { |
297a533b | 843 | int volt; |
4e924a81 | 844 | |
d74534c2 | 845 | volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); |
c6cd4f26 PR |
846 | if (volt < 0) { |
847 | dev_err(di->dev, "error reading voltage\n"); | |
297a533b | 848 | return volt; |
c6cd4f26 | 849 | } |
4e924a81 | 850 | |
297a533b LPC |
851 | val->intval = volt * 1000; |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
081bab21 | 856 | static int bq27xxx_simple_value(int value, |
ce33edfa | 857 | union power_supply_propval *val) |
297a533b LPC |
858 | { |
859 | if (value < 0) | |
860 | return value; | |
861 | ||
862 | val->intval = value; | |
4e924a81 | 863 | |
4e924a81 GI |
864 | return 0; |
865 | } | |
866 | ||
081bab21 | 867 | static int bq27xxx_battery_get_property(struct power_supply *psy, |
b996ad0e RG |
868 | enum power_supply_property psp, |
869 | union power_supply_propval *val) | |
870 | { | |
4e924a81 | 871 | int ret = 0; |
081bab21 | 872 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
3413b4ea | 873 | |
740b755a LPC |
874 | mutex_lock(&di->lock); |
875 | if (time_is_before_jiffies(di->last_update + 5 * HZ)) { | |
876 | cancel_delayed_work_sync(&di->work); | |
081bab21 | 877 | bq27xxx_battery_poll(&di->work.work); |
740b755a LPC |
878 | } |
879 | mutex_unlock(&di->lock); | |
297a533b LPC |
880 | |
881 | if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0) | |
3413b4ea | 882 | return -ENODEV; |
b996ad0e RG |
883 | |
884 | switch (psp) { | |
4e924a81 | 885 | case POWER_SUPPLY_PROP_STATUS: |
081bab21 | 886 | ret = bq27xxx_battery_status(di, val); |
4e924a81 | 887 | break; |
b996ad0e | 888 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
081bab21 | 889 | ret = bq27xxx_battery_voltage(di, val); |
3413b4ea | 890 | break; |
b996ad0e | 891 | case POWER_SUPPLY_PROP_PRESENT: |
297a533b | 892 | val->intval = di->cache.flags < 0 ? 0 : 1; |
b996ad0e RG |
893 | break; |
894 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
081bab21 | 895 | ret = bq27xxx_battery_current(di, val); |
b996ad0e RG |
896 | break; |
897 | case POWER_SUPPLY_PROP_CAPACITY: | |
081bab21 | 898 | ret = bq27xxx_simple_value(di->cache.capacity, val); |
b996ad0e | 899 | break; |
d66bab3f | 900 | case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
081bab21 | 901 | ret = bq27xxx_battery_capacity_level(di, val); |
d66bab3f | 902 | break; |
b996ad0e | 903 | case POWER_SUPPLY_PROP_TEMP: |
081bab21 | 904 | ret = bq27xxx_simple_value(di->cache.temperature, val); |
5dc3443e | 905 | if (ret == 0) |
d74534c2 | 906 | val->intval -= 2731; /* convert decidegree k to c */ |
b996ad0e | 907 | break; |
4e924a81 | 908 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
081bab21 | 909 | ret = bq27xxx_simple_value(di->cache.time_to_empty, val); |
4e924a81 GI |
910 | break; |
911 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
081bab21 | 912 | ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val); |
4e924a81 GI |
913 | break; |
914 | case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: | |
081bab21 | 915 | ret = bq27xxx_simple_value(di->cache.time_to_full, val); |
4e924a81 | 916 | break; |
5661f334 LPC |
917 | case POWER_SUPPLY_PROP_TECHNOLOGY: |
918 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
919 | break; | |
631c17ee | 920 | case POWER_SUPPLY_PROP_CHARGE_NOW: |
081bab21 | 921 | ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val); |
631c17ee PR |
922 | break; |
923 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
081bab21 | 924 | ret = bq27xxx_simple_value(di->cache.charge_full, val); |
631c17ee PR |
925 | break; |
926 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
081bab21 | 927 | ret = bq27xxx_simple_value(di->charge_design_full, val); |
631c17ee | 928 | break; |
73c244a8 | 929 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
081bab21 | 930 | ret = bq27xxx_simple_value(di->cache.cycle_count, val); |
631c17ee PR |
931 | break; |
932 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
081bab21 | 933 | ret = bq27xxx_simple_value(di->cache.energy, val); |
631c17ee | 934 | break; |
9903e627 | 935 | case POWER_SUPPLY_PROP_POWER_AVG: |
081bab21 | 936 | ret = bq27xxx_simple_value(di->cache.power_avg, val); |
9903e627 SR |
937 | break; |
938 | case POWER_SUPPLY_PROP_HEALTH: | |
081bab21 | 939 | ret = bq27xxx_simple_value(di->cache.health, val); |
9903e627 | 940 | break; |
db04fc5c AD |
941 | case POWER_SUPPLY_PROP_MANUFACTURER: |
942 | val->strval = BQ27XXX_MANUFACTURER; | |
943 | break; | |
b996ad0e RG |
944 | default: |
945 | return -EINVAL; | |
946 | } | |
947 | ||
4e924a81 | 948 | return ret; |
b996ad0e RG |
949 | } |
950 | ||
081bab21 | 951 | static void bq27xxx_external_power_changed(struct power_supply *psy) |
740b755a | 952 | { |
081bab21 | 953 | struct bq27xxx_device_info *di = power_supply_get_drvdata(psy); |
740b755a LPC |
954 | |
955 | cancel_delayed_work_sync(&di->work); | |
956 | schedule_delayed_work(&di->work, 0); | |
957 | } | |
958 | ||
703df6c0 | 959 | int bq27xxx_battery_setup(struct bq27xxx_device_info *di) |
b996ad0e | 960 | { |
297d716f KK |
961 | struct power_supply_desc *psy_desc; |
962 | struct power_supply_config psy_cfg = { .drv_data = di, }; | |
963 | ||
703df6c0 AD |
964 | INIT_DELAYED_WORK(&di->work, bq27xxx_battery_poll); |
965 | mutex_init(&di->lock); | |
966 | di->regs = bq27xxx_regs[di->chip]; | |
967 | ||
297d716f KK |
968 | psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL); |
969 | if (!psy_desc) | |
970 | return -ENOMEM; | |
a40402ef | 971 | |
703df6c0 | 972 | psy_desc->name = di->name; |
297d716f | 973 | psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; |
d74534c2 AD |
974 | psy_desc->properties = bq27xxx_battery_props[di->chip].props; |
975 | psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; | |
081bab21 AD |
976 | psy_desc->get_property = bq27xxx_battery_get_property; |
977 | psy_desc->external_power_changed = bq27xxx_external_power_changed; | |
740b755a | 978 | |
297d716f KK |
979 | di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg); |
980 | if (IS_ERR(di->bat)) { | |
703df6c0 AD |
981 | dev_err(di->dev, "failed to register battery\n"); |
982 | return PTR_ERR(di->bat); | |
a40402ef LPC |
983 | } |
984 | ||
985 | dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); | |
986 | ||
081bab21 | 987 | bq27xxx_battery_update(di); |
297a533b | 988 | |
a40402ef | 989 | return 0; |
b996ad0e | 990 | } |
703df6c0 | 991 | EXPORT_SYMBOL_GPL(bq27xxx_battery_setup); |
b996ad0e | 992 | |
703df6c0 | 993 | void bq27xxx_battery_teardown(struct bq27xxx_device_info *di) |
740b755a | 994 | { |
8cfaaa81 | 995 | /* |
081bab21 AD |
996 | * power_supply_unregister call bq27xxx_battery_get_property which |
997 | * call bq27xxx_battery_poll. | |
998 | * Make sure that bq27xxx_battery_poll will not call | |
8cfaaa81 PR |
999 | * schedule_delayed_work again after unregister (which cause OOPS). |
1000 | */ | |
1001 | poll_interval = 0; | |
1002 | ||
740b755a LPC |
1003 | cancel_delayed_work_sync(&di->work); |
1004 | ||
297d716f | 1005 | power_supply_unregister(di->bat); |
740b755a LPC |
1006 | |
1007 | mutex_destroy(&di->lock); | |
1008 | } | |
703df6c0 | 1009 | EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown); |
7fb7ba58 | 1010 | |
081bab21 AD |
1011 | static int bq27xxx_battery_platform_read(struct bq27xxx_device_info *di, u8 reg, |
1012 | bool single) | |
7fb7ba58 LPC |
1013 | { |
1014 | struct device *dev = di->dev; | |
081bab21 | 1015 | struct bq27xxx_platform_data *pdata = dev->platform_data; |
7fb7ba58 LPC |
1016 | unsigned int timeout = 3; |
1017 | int upper, lower; | |
1018 | int temp; | |
1019 | ||
1020 | if (!single) { | |
1021 | /* Make sure the value has not changed in between reading the | |
1022 | * lower and the upper part */ | |
1023 | upper = pdata->read(dev, reg + 1); | |
1024 | do { | |
1025 | temp = upper; | |
1026 | if (upper < 0) | |
1027 | return upper; | |
1028 | ||
1029 | lower = pdata->read(dev, reg); | |
1030 | if (lower < 0) | |
1031 | return lower; | |
1032 | ||
1033 | upper = pdata->read(dev, reg + 1); | |
1034 | } while (temp != upper && --timeout); | |
1035 | ||
1036 | if (timeout == 0) | |
1037 | return -EIO; | |
1038 | ||
297a533b | 1039 | return (upper << 8) | lower; |
7fb7ba58 | 1040 | } |
297a533b LPC |
1041 | |
1042 | return pdata->read(dev, reg); | |
7fb7ba58 LPC |
1043 | } |
1044 | ||
081bab21 | 1045 | static int bq27xxx_battery_platform_probe(struct platform_device *pdev) |
7fb7ba58 | 1046 | { |
081bab21 AD |
1047 | struct bq27xxx_device_info *di; |
1048 | struct bq27xxx_platform_data *pdata = pdev->dev.platform_data; | |
7fb7ba58 LPC |
1049 | |
1050 | if (!pdata) { | |
1051 | dev_err(&pdev->dev, "no platform_data supplied\n"); | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | ||
1055 | if (!pdata->read) { | |
1056 | dev_err(&pdev->dev, "no hdq read callback supplied\n"); | |
1057 | return -EINVAL; | |
1058 | } | |
1059 | ||
424cfde4 AD |
1060 | if (!pdata->chip) { |
1061 | dev_err(&pdev->dev, "no device supplied\n"); | |
1062 | return -EINVAL; | |
1063 | } | |
1064 | ||
1cb82fdb | 1065 | di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); |
6d0a1815 | 1066 | if (!di) |
7fb7ba58 | 1067 | return -ENOMEM; |
7fb7ba58 LPC |
1068 | |
1069 | platform_set_drvdata(pdev, di); | |
1070 | ||
1071 | di->dev = &pdev->dev; | |
424cfde4 | 1072 | di->chip = pdata->chip; |
703df6c0 AD |
1073 | di->name = pdata->name ?: dev_name(&pdev->dev); |
1074 | di->bus.read = bq27xxx_battery_platform_read; | |
7fb7ba58 | 1075 | |
703df6c0 | 1076 | return bq27xxx_battery_setup(di); |
7fb7ba58 LPC |
1077 | } |
1078 | ||
081bab21 | 1079 | static int bq27xxx_battery_platform_remove(struct platform_device *pdev) |
7fb7ba58 | 1080 | { |
081bab21 | 1081 | struct bq27xxx_device_info *di = platform_get_drvdata(pdev); |
7fb7ba58 | 1082 | |
703df6c0 | 1083 | bq27xxx_battery_teardown(di); |
740b755a | 1084 | |
7fb7ba58 LPC |
1085 | return 0; |
1086 | } | |
1087 | ||
703df6c0 AD |
1088 | static const struct platform_device_id bq27xxx_battery_platform_id_table[] = { |
1089 | { "bq27000-battery", }, | |
1090 | { /* sentinel */ } | |
1091 | }; | |
1092 | MODULE_DEVICE_TABLE(platform, bq27xxx_battery_platform_id_table); | |
1093 | ||
7df3a746 PR |
1094 | #ifdef CONFIG_OF |
1095 | static const struct of_device_id bq27xxx_battery_platform_of_match_table[] = { | |
1096 | { .compatible = "ti,bq27000" }, | |
1097 | {}, | |
1098 | }; | |
1099 | MODULE_DEVICE_TABLE(of, bq27xxx_battery_platform_of_match_table); | |
1100 | #endif | |
1101 | ||
081bab21 AD |
1102 | static struct platform_driver bq27xxx_battery_platform_driver = { |
1103 | .probe = bq27xxx_battery_platform_probe, | |
1104 | .remove = bq27xxx_battery_platform_remove, | |
7fb7ba58 LPC |
1105 | .driver = { |
1106 | .name = "bq27000-battery", | |
7df3a746 | 1107 | .of_match_table = of_match_ptr(bq27xxx_battery_platform_of_match_table), |
7fb7ba58 | 1108 | }, |
703df6c0 | 1109 | .id_table = bq27xxx_battery_platform_id_table, |
7fb7ba58 | 1110 | }; |
703df6c0 | 1111 | module_platform_driver(bq27xxx_battery_platform_driver); |
8ebb7e9c | 1112 | |
7df3a746 PR |
1113 | MODULE_ALIAS("platform:bq27000-battery"); |
1114 | ||
b996ad0e | 1115 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
081bab21 | 1116 | MODULE_DESCRIPTION("BQ27xxx battery monitor driver"); |
b996ad0e | 1117 | MODULE_LICENSE("GPL"); |