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1 | /* |
2 | * bq2415x charger driver |
3 | * |
4 | * Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com> |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; if not, write to the Free Software Foundation, Inc., |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
19 | */ |
20 | |
21 | /* |
22 | * Datasheets: |
23 | * http://www.ti.com/product/bq24150 |
24 | * http://www.ti.com/product/bq24150a |
25 | * http://www.ti.com/product/bq24152 |
26 | * http://www.ti.com/product/bq24153 |
27 | * http://www.ti.com/product/bq24153a |
28 | * http://www.ti.com/product/bq24155 |
29 | */ |
30 | |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> |
33 | #include <linux/param.h> |
34 | #include <linux/err.h> |
35 | #include <linux/workqueue.h> |
36 | #include <linux/sysfs.h> |
37 | #include <linux/platform_device.h> |
38 | #include <linux/power_supply.h> |
39 | #include <linux/idr.h> |
40 | #include <linux/i2c.h> |
41 | #include <linux/slab.h> |
42 | |
43 | #include <linux/power/bq2415x_charger.h> |
44 | |
45 | /* timeout for resetting chip timer */ |
46 | #define BQ2415X_TIMER_TIMEOUT 10 |
47 | |
48 | #define BQ2415X_REG_STATUS 0x00 |
49 | #define BQ2415X_REG_CONTROL 0x01 |
50 | #define BQ2415X_REG_VOLTAGE 0x02 |
51 | #define BQ2415X_REG_VENDER 0x03 |
52 | #define BQ2415X_REG_CURRENT 0x04 |
53 | |
54 | /* reset state for all registers */ |
55 | #define BQ2415X_RESET_STATUS BIT(6) |
56 | #define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5)) |
57 | #define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3)) |
58 | #define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7)) |
59 | |
60 | /* status register */ |
61 | #define BQ2415X_BIT_TMR_RST 7 |
62 | #define BQ2415X_BIT_OTG 7 |
63 | #define BQ2415X_BIT_EN_STAT 6 |
64 | #define BQ2415X_MASK_STAT (BIT(4)|BIT(5)) |
65 | #define BQ2415X_SHIFT_STAT 4 |
66 | #define BQ2415X_BIT_BOOST 3 |
67 | #define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2)) |
68 | #define BQ2415X_SHIFT_FAULT 0 |
69 | |
70 | /* control register */ |
71 | #define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7)) |
72 | #define BQ2415X_SHIFT_LIMIT 6 |
73 | #define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5)) |
74 | #define BQ2415X_SHIFT_VLOWV 4 |
75 | #define BQ2415X_BIT_TE 3 |
76 | #define BQ2415X_BIT_CE 2 |
77 | #define BQ2415X_BIT_HZ_MODE 1 |
78 | #define BQ2415X_BIT_OPA_MODE 0 |
79 | |
80 | /* voltage register */ |
81 | #define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7)) |
82 | #define BQ2415X_SHIFT_VO 2 |
83 | #define BQ2415X_BIT_OTG_PL 1 |
84 | #define BQ2415X_BIT_OTG_EN 0 |
85 | |
86 | /* vender register */ |
87 | #define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7)) |
88 | #define BQ2415X_SHIFT_VENDER 5 |
89 | #define BQ2415X_MASK_PN (BIT(3)|BIT(4)) |
90 | #define BQ2415X_SHIFT_PN 3 |
91 | #define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2)) |
92 | #define BQ2415X_SHIFT_REVISION 0 |
93 | |
94 | /* current register */ |
95 | #define BQ2415X_MASK_RESET BIT(7) |
96 | #define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)) |
97 | #define BQ2415X_SHIFT_VI_CHRG 4 |
98 | /* N/A BIT(3) */ |
99 | #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)) |
100 | #define BQ2415X_SHIFT_VI_TERM 0 |
101 | |
102 | |
103 | enum bq2415x_command { |
104 | BQ2415X_TIMER_RESET, |
105 | BQ2415X_OTG_STATUS, |
106 | BQ2415X_STAT_PIN_STATUS, |
107 | BQ2415X_STAT_PIN_ENABLE, |
108 | BQ2415X_STAT_PIN_DISABLE, |
109 | BQ2415X_CHARGE_STATUS, |
110 | BQ2415X_BOOST_STATUS, |
111 | BQ2415X_FAULT_STATUS, |
112 | |
113 | BQ2415X_CHARGE_TERMINATION_STATUS, |
114 | BQ2415X_CHARGE_TERMINATION_ENABLE, |
115 | BQ2415X_CHARGE_TERMINATION_DISABLE, |
116 | BQ2415X_CHARGER_STATUS, |
117 | BQ2415X_CHARGER_ENABLE, |
118 | BQ2415X_CHARGER_DISABLE, |
119 | BQ2415X_HIGH_IMPEDANCE_STATUS, |
120 | BQ2415X_HIGH_IMPEDANCE_ENABLE, |
121 | BQ2415X_HIGH_IMPEDANCE_DISABLE, |
122 | BQ2415X_BOOST_MODE_STATUS, |
123 | BQ2415X_BOOST_MODE_ENABLE, |
124 | BQ2415X_BOOST_MODE_DISABLE, |
125 | |
126 | BQ2415X_OTG_LEVEL, |
127 | BQ2415X_OTG_ACTIVATE_HIGH, |
128 | BQ2415X_OTG_ACTIVATE_LOW, |
129 | BQ2415X_OTG_PIN_STATUS, |
130 | BQ2415X_OTG_PIN_ENABLE, |
131 | BQ2415X_OTG_PIN_DISABLE, |
132 | |
133 | BQ2415X_VENDER_CODE, |
134 | BQ2415X_PART_NUMBER, |
135 | BQ2415X_REVISION, |
136 | }; |
137 | |
138 | enum bq2415x_chip { |
139 | BQUNKNOWN, |
140 | BQ24150, |
141 | BQ24150A, |
142 | BQ24151, |
143 | BQ24151A, |
144 | BQ24152, |
145 | BQ24153, |
146 | BQ24153A, |
147 | BQ24155, |
148 | BQ24156, |
149 | BQ24156A, |
150 | BQ24158, |
151 | }; |
152 | |
153 | static char *bq2415x_chip_name[] = { |
154 | "unknown", |
155 | "bq24150", |
156 | "bq24150a", |
157 | "bq24151", |
158 | "bq24151a", |
159 | "bq24152", |
160 | "bq24153", |
161 | "bq24153a", |
162 | "bq24155", |
163 | "bq24156", |
164 | "bq24156a", |
165 | "bq24158", |
166 | }; |
167 | |
168 | struct bq2415x_device { |
169 | struct device *dev; |
170 | struct bq2415x_platform_data init_data; |
171 | struct power_supply charger; |
172 | struct delayed_work work; |
173 | enum bq2415x_mode reported_mode;/* mode reported by hook function */ |
174 | enum bq2415x_mode mode; /* current configured mode */ |
175 | enum bq2415x_chip chip; |
176 | const char *timer_error; |
177 | char *model; |
178 | char *name; |
179 | int autotimer; /* 1 - if driver automatically reset timer, 0 - not */ |
180 | int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */ |
181 | int id; |
182 | }; |
183 | |
184 | /* each registered chip must have unique id */ |
185 | static DEFINE_IDR(bq2415x_id); |
186 | |
187 | static DEFINE_MUTEX(bq2415x_id_mutex); |
188 | static DEFINE_MUTEX(bq2415x_timer_mutex); |
189 | static DEFINE_MUTEX(bq2415x_i2c_mutex); |
190 | |
191 | /**** i2c read functions ****/ |
192 | |
193 | /* read value from register */ |
194 | static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg) |
195 | { |
196 | struct i2c_client *client = to_i2c_client(bq->dev); |
197 | struct i2c_msg msg[2]; |
198 | u8 val; |
199 | int ret; |
200 | |
201 | if (!client->adapter) |
202 | return -ENODEV; |
203 | |
204 | msg[0].addr = client->addr; |
205 | msg[0].flags = 0; |
206 | msg[0].buf = ® |
207 | msg[0].len = sizeof(reg); |
208 | msg[1].addr = client->addr; |
209 | msg[1].flags = I2C_M_RD; |
210 | msg[1].buf = &val; |
211 | msg[1].len = sizeof(val); |
212 | |
213 | mutex_lock(&bq2415x_i2c_mutex); |
214 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
215 | mutex_unlock(&bq2415x_i2c_mutex); |
216 | |
217 | if (ret < 0) |
218 | return ret; |
219 | |
220 | return val; |
221 | } |
222 | |
223 | /* read value from register, apply mask and right shift it */ |
224 | static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg, |
225 | u8 mask, u8 shift) |
226 | { |
227 | int ret; |
228 | |
229 | if (shift > 8) |
230 | return -EINVAL; |
231 | |
232 | ret = bq2415x_i2c_read(bq, reg); |
233 | if (ret < 0) |
234 | return ret; |
235 | return (ret & mask) >> shift; |
236 | } |
237 | |
238 | /* read value from register and return one specified bit */ |
239 | static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit) |
240 | { |
241 | if (bit > 8) |
242 | return -EINVAL; |
243 | return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit); |
244 | } |
245 | |
246 | /**** i2c write functions ****/ |
247 | |
248 | /* write value to register */ |
249 | static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val) |
250 | { |
251 | struct i2c_client *client = to_i2c_client(bq->dev); |
252 | struct i2c_msg msg[1]; |
253 | u8 data[2]; |
254 | int ret; |
255 | |
256 | data[0] = reg; |
257 | data[1] = val; |
258 | |
259 | msg[0].addr = client->addr; |
260 | msg[0].flags = 0; |
261 | msg[0].buf = data; |
262 | msg[0].len = ARRAY_SIZE(data); |
263 | |
264 | mutex_lock(&bq2415x_i2c_mutex); |
265 | ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); |
266 | mutex_unlock(&bq2415x_i2c_mutex); |
267 | |
268 | /* i2c_transfer returns number of messages transferred */ |
269 | if (ret < 0) |
270 | return ret; |
271 | else if (ret != 1) |
272 | return -EIO; |
273 | |
274 | return 0; |
275 | } |
276 | |
277 | /* read value from register, change it with mask left shifted and write back */ |
278 | static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val, |
279 | u8 mask, u8 shift) |
280 | { |
281 | int ret; |
282 | |
283 | if (shift > 8) |
284 | return -EINVAL; |
285 | |
286 | ret = bq2415x_i2c_read(bq, reg); |
287 | if (ret < 0) |
288 | return ret; |
289 | |
290 | ret &= ~mask; |
291 | ret |= val << shift; |
292 | |
293 | return bq2415x_i2c_write(bq, reg, ret); |
294 | } |
295 | |
296 | /* change only one bit in register */ |
297 | static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg, |
298 | bool val, u8 bit) |
299 | { |
300 | if (bit > 8) |
301 | return -EINVAL; |
302 | return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit); |
303 | } |
304 | |
305 | /**** global functions ****/ |
306 | |
307 | /* exec command function */ |
308 | static int bq2415x_exec_command(struct bq2415x_device *bq, |
309 | enum bq2415x_command command) |
310 | { |
311 | int ret; |
312 | |
313 | switch (command) { |
314 | case BQ2415X_TIMER_RESET: |
315 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, |
316 | 1, BQ2415X_BIT_TMR_RST); |
317 | case BQ2415X_OTG_STATUS: |
318 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
319 | BQ2415X_BIT_OTG); |
320 | case BQ2415X_STAT_PIN_STATUS: |
321 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
322 | BQ2415X_BIT_EN_STAT); |
323 | case BQ2415X_STAT_PIN_ENABLE: |
324 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1, |
325 | BQ2415X_BIT_EN_STAT); |
326 | case BQ2415X_STAT_PIN_DISABLE: |
327 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0, |
328 | BQ2415X_BIT_EN_STAT); |
329 | case BQ2415X_CHARGE_STATUS: |
330 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, |
331 | BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT); |
332 | case BQ2415X_BOOST_STATUS: |
333 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS, |
334 | BQ2415X_BIT_BOOST); |
335 | case BQ2415X_FAULT_STATUS: |
336 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS, |
337 | BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT); |
338 | |
339 | case BQ2415X_CHARGE_TERMINATION_STATUS: |
340 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
341 | BQ2415X_BIT_TE); |
342 | case BQ2415X_CHARGE_TERMINATION_ENABLE: |
343 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
344 | 1, BQ2415X_BIT_TE); |
345 | case BQ2415X_CHARGE_TERMINATION_DISABLE: |
346 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
347 | 0, BQ2415X_BIT_TE); |
348 | case BQ2415X_CHARGER_STATUS: |
349 | ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
350 | BQ2415X_BIT_CE); |
351 | if (ret < 0) |
352 | return ret; |
353 | else |
354 | return ret > 0 ? 0 : 1; |
355 | case BQ2415X_CHARGER_ENABLE: |
356 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
357 | 0, BQ2415X_BIT_CE); |
358 | case BQ2415X_CHARGER_DISABLE: |
359 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
360 | 1, BQ2415X_BIT_CE); |
361 | case BQ2415X_HIGH_IMPEDANCE_STATUS: |
362 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
363 | BQ2415X_BIT_HZ_MODE); |
364 | case BQ2415X_HIGH_IMPEDANCE_ENABLE: |
365 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
366 | 1, BQ2415X_BIT_HZ_MODE); |
367 | case BQ2415X_HIGH_IMPEDANCE_DISABLE: |
368 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
369 | 0, BQ2415X_BIT_HZ_MODE); |
370 | case BQ2415X_BOOST_MODE_STATUS: |
371 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL, |
372 | BQ2415X_BIT_OPA_MODE); |
373 | case BQ2415X_BOOST_MODE_ENABLE: |
374 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
375 | 1, BQ2415X_BIT_OPA_MODE); |
376 | case BQ2415X_BOOST_MODE_DISABLE: |
377 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL, |
378 | 0, BQ2415X_BIT_OPA_MODE); |
379 | |
380 | case BQ2415X_OTG_LEVEL: |
381 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, |
382 | BQ2415X_BIT_OTG_PL); |
383 | case BQ2415X_OTG_ACTIVATE_HIGH: |
384 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
385 | 1, BQ2415X_BIT_OTG_PL); |
386 | case BQ2415X_OTG_ACTIVATE_LOW: |
387 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
388 | 0, BQ2415X_BIT_OTG_PL); |
389 | case BQ2415X_OTG_PIN_STATUS: |
390 | return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE, |
391 | BQ2415X_BIT_OTG_EN); |
392 | case BQ2415X_OTG_PIN_ENABLE: |
393 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
394 | 1, BQ2415X_BIT_OTG_EN); |
395 | case BQ2415X_OTG_PIN_DISABLE: |
396 | return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE, |
397 | 0, BQ2415X_BIT_OTG_EN); |
398 | |
399 | case BQ2415X_VENDER_CODE: |
400 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
401 | BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER); |
402 | case BQ2415X_PART_NUMBER: |
403 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
404 | BQ2415X_MASK_PN, BQ2415X_SHIFT_PN); |
405 | case BQ2415X_REVISION: |
406 | return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER, |
407 | BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION); |
408 | } |
409 | return -EINVAL; |
410 | } |
411 | |
412 | /* detect chip type */ |
413 | static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq) |
414 | { |
415 | struct i2c_client *client = to_i2c_client(bq->dev); |
416 | int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER); |
417 | |
418 | if (ret < 0) |
419 | return ret; |
420 | |
421 | switch (client->addr) { |
422 | case 0x6b: |
423 | switch (ret) { |
424 | case 0: |
425 | if (bq->chip == BQ24151A) |
426 | return bq->chip; |
427 | else |
428 | return BQ24151; |
429 | case 1: |
430 | if (bq->chip == BQ24150A || |
431 | bq->chip == BQ24152 || |
432 | bq->chip == BQ24155) |
433 | return bq->chip; |
434 | else |
435 | return BQ24150; |
436 | case 2: |
437 | if (bq->chip == BQ24153A) |
438 | return bq->chip; |
439 | else |
440 | return BQ24153; |
441 | default: |
442 | return BQUNKNOWN; |
443 | } |
444 | break; |
445 | |
446 | case 0x6a: |
447 | switch (ret) { |
448 | case 0: |
449 | if (bq->chip == BQ24156A) |
450 | return bq->chip; |
451 | else |
452 | return BQ24156; |
453 | case 2: |
454 | return BQ24158; |
455 | default: |
456 | return BQUNKNOWN; |
457 | } |
458 | break; |
459 | } |
460 | |
461 | return BQUNKNOWN; |
462 | } |
463 | |
464 | /* detect chip revision */ |
465 | static int bq2415x_detect_revision(struct bq2415x_device *bq) |
466 | { |
467 | int ret = bq2415x_exec_command(bq, BQ2415X_REVISION); |
468 | int chip = bq2415x_detect_chip(bq); |
469 | |
470 | if (ret < 0 || chip < 0) |
471 | return -1; |
472 | |
473 | switch (chip) { |
474 | case BQ24150: |
475 | case BQ24150A: |
476 | case BQ24151: |
477 | case BQ24151A: |
478 | case BQ24152: |
479 | if (ret >= 0 && ret <= 3) |
480 | return ret; |
481 | else |
482 | return -1; |
483 | case BQ24153: |
484 | case BQ24153A: |
485 | case BQ24156: |
486 | case BQ24156A: |
487 | case BQ24158: |
488 | if (ret == 3) |
489 | return 0; |
490 | else if (ret == 1) |
491 | return 1; |
492 | else |
493 | return -1; |
494 | case BQ24155: |
495 | if (ret == 3) |
496 | return 3; |
497 | else |
498 | return -1; |
499 | case BQUNKNOWN: |
500 | return -1; |
501 | } |
502 | |
503 | return -1; |
504 | } |
505 | |
506 | /* return chip vender code */ |
507 | static int bq2415x_get_vender_code(struct bq2415x_device *bq) |
508 | { |
509 | int ret; |
510 | |
511 | ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE); |
512 | if (ret < 0) |
513 | return 0; |
514 | |
515 | /* convert to binary */ |
516 | return (ret & 0x1) + |
517 | ((ret >> 1) & 0x1) * 10 + |
518 | ((ret >> 2) & 0x1) * 100; |
519 | } |
520 | |
521 | /* reset all chip registers to default state */ |
522 | static void bq2415x_reset_chip(struct bq2415x_device *bq) |
523 | { |
524 | bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT); |
525 | bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE); |
526 | bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL); |
527 | bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS); |
528 | bq->timer_error = NULL; |
529 | } |
530 | |
531 | /**** properties functions ****/ |
532 | |
533 | /* set current limit in mA */ |
534 | static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA) |
535 | { |
536 | int val; |
537 | |
538 | if (mA <= 100) |
539 | val = 0; |
540 | else if (mA <= 500) |
541 | val = 1; |
542 | else if (mA <= 800) |
543 | val = 2; |
544 | else |
545 | val = 3; |
546 | |
547 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
548 | BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); |
549 | } |
550 | |
551 | /* get current limit in mA */ |
552 | static int bq2415x_get_current_limit(struct bq2415x_device *bq) |
553 | { |
554 | int ret; |
555 | |
556 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, |
557 | BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT); |
558 | if (ret < 0) |
559 | return ret; |
560 | else if (ret == 0) |
561 | return 100; |
562 | else if (ret == 1) |
563 | return 500; |
564 | else if (ret == 2) |
565 | return 800; |
566 | else if (ret == 3) |
567 | return 1800; |
568 | return -EINVAL; |
569 | } |
570 | |
571 | /* set weak battery voltage in mV */ |
572 | static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV) |
573 | { |
574 | int val; |
575 | |
576 | /* round to 100mV */ |
577 | if (mV <= 3400 + 50) |
578 | val = 0; |
579 | else if (mV <= 3500 + 50) |
580 | val = 1; |
581 | else if (mV <= 3600 + 50) |
582 | val = 2; |
583 | else |
584 | val = 3; |
585 | |
586 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val, |
587 | BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); |
588 | } |
589 | |
590 | /* get weak battery voltage in mV */ |
591 | static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq) |
592 | { |
593 | int ret; |
594 | |
595 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL, |
596 | BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV); |
597 | if (ret < 0) |
598 | return ret; |
599 | return 100 * (34 + ret); |
600 | } |
601 | |
602 | /* set battery regulation voltage in mV */ |
603 | static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq, |
604 | int mV) |
605 | { |
606 | int val = (mV/10 - 350) / 2; |
607 | |
608 | if (val < 0) |
609 | val = 0; |
610 | else if (val > 94) /* FIXME: Max is 94 or 122 ? Set max value ? */ |
611 | return -EINVAL; |
612 | |
613 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val, |
614 | BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); |
615 | } |
616 | |
617 | /* get battery regulation voltage in mV */ |
618 | static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq) |
619 | { |
620 | int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE, |
621 | BQ2415X_MASK_VO, BQ2415X_SHIFT_VO); |
622 | |
623 | if (ret < 0) |
624 | return ret; |
625 | return 10 * (350 + 2*ret); |
626 | } |
627 | |
628 | /* set charge current in mA (platform data must provide resistor sense) */ |
629 | static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA) |
630 | { |
631 | int val; |
632 | |
633 | if (bq->init_data.resistor_sense <= 0) |
634 | return -ENOSYS; |
635 | |
636 | val = (mA * bq->init_data.resistor_sense - 37400) / 6800; |
637 | if (val < 0) |
638 | val = 0; |
639 | else if (val > 7) |
640 | val = 7; |
641 | |
642 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, |
643 | BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET, |
644 | BQ2415X_SHIFT_VI_CHRG); |
645 | } |
646 | |
647 | /* get charge current in mA (platform data must provide resistor sense) */ |
648 | static int bq2415x_get_charge_current(struct bq2415x_device *bq) |
649 | { |
650 | int ret; |
651 | |
652 | if (bq->init_data.resistor_sense <= 0) |
653 | return -ENOSYS; |
654 | |
655 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, |
656 | BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG); |
657 | if (ret < 0) |
658 | return ret; |
659 | return (37400 + 6800*ret) / bq->init_data.resistor_sense; |
660 | } |
661 | |
662 | /* set termination current in mA (platform data must provide resistor sense) */ |
663 | static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA) |
664 | { |
665 | int val; |
666 | |
667 | if (bq->init_data.resistor_sense <= 0) |
668 | return -ENOSYS; |
669 | |
670 | val = (mA * bq->init_data.resistor_sense - 3400) / 3400; |
671 | if (val < 0) |
672 | val = 0; |
673 | else if (val > 7) |
674 | val = 7; |
675 | |
676 | return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val, |
677 | BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET, |
678 | BQ2415X_SHIFT_VI_TERM); |
679 | } |
680 | |
681 | /* get termination current in mA (platform data must provide resistor sense) */ |
682 | static int bq2415x_get_termination_current(struct bq2415x_device *bq) |
683 | { |
684 | int ret; |
685 | |
686 | if (bq->init_data.resistor_sense <= 0) |
687 | return -ENOSYS; |
688 | |
689 | ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT, |
690 | BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM); |
691 | if (ret < 0) |
692 | return ret; |
693 | return (3400 + 3400*ret) / bq->init_data.resistor_sense; |
694 | } |
695 | |
696 | /* set default value of property */ |
697 | #define bq2415x_set_default_value(bq, prop) \ |
698 | do { \ |
699 | int ret = 0; \ |
700 | if (bq->init_data.prop != -1) \ |
701 | ret = bq2415x_set_##prop(bq, bq->init_data.prop); \ |
702 | if (ret < 0) \ |
703 | return ret; \ |
704 | } while (0) |
705 | |
706 | /* set default values of all properties */ |
707 | static int bq2415x_set_defaults(struct bq2415x_device *bq) |
708 | { |
709 | bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); |
710 | bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); |
711 | bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE); |
712 | |
713 | bq2415x_set_default_value(bq, current_limit); |
714 | bq2415x_set_default_value(bq, weak_battery_voltage); |
715 | bq2415x_set_default_value(bq, battery_regulation_voltage); |
716 | |
717 | if (bq->init_data.resistor_sense > 0) { |
718 | bq2415x_set_default_value(bq, charge_current); |
719 | bq2415x_set_default_value(bq, termination_current); |
720 | bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE); |
721 | } |
722 | |
723 | bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); |
724 | return 0; |
725 | } |
726 | |
727 | /**** charger mode functions ****/ |
728 | |
729 | /* set charger mode */ |
730 | static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode) |
731 | { |
732 | int ret = 0; |
733 | int charger = 0; |
734 | int boost = 0; |
735 | |
736 | if (mode == BQ2415X_MODE_BOOST) |
737 | boost = 1; |
738 | else if (mode != BQ2415X_MODE_OFF) |
739 | charger = 1; |
740 | |
741 | if (!charger) |
742 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE); |
743 | |
744 | if (!boost) |
745 | ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE); |
746 | |
747 | if (ret < 0) |
748 | return ret; |
749 | |
750 | switch (mode) { |
751 | case BQ2415X_MODE_OFF: |
752 | dev_dbg(bq->dev, "changing mode to: Offline\n"); |
753 | ret = bq2415x_set_current_limit(bq, 100); |
754 | break; |
755 | case BQ2415X_MODE_NONE: |
756 | dev_dbg(bq->dev, "changing mode to: N/A\n"); |
757 | ret = bq2415x_set_current_limit(bq, 100); |
758 | break; |
759 | case BQ2415X_MODE_HOST_CHARGER: |
760 | dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n"); |
761 | ret = bq2415x_set_current_limit(bq, 500); |
762 | break; |
763 | case BQ2415X_MODE_DEDICATED_CHARGER: |
764 | dev_dbg(bq->dev, "changing mode to: Dedicated charger\n"); |
765 | ret = bq2415x_set_current_limit(bq, 1800); |
766 | break; |
767 | case BQ2415X_MODE_BOOST: /* Boost mode */ |
768 | dev_dbg(bq->dev, "changing mode to: Boost\n"); |
769 | ret = bq2415x_set_current_limit(bq, 100); |
770 | break; |
771 | } |
772 | |
773 | if (ret < 0) |
774 | return ret; |
775 | |
776 | if (charger) |
777 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE); |
778 | else if (boost) |
779 | ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE); |
780 | |
781 | if (ret < 0) |
782 | return ret; |
783 | |
784 | bq2415x_set_default_value(bq, weak_battery_voltage); |
785 | bq2415x_set_default_value(bq, battery_regulation_voltage); |
786 | |
787 | bq->mode = mode; |
788 | sysfs_notify(&bq->charger.dev->kobj, NULL, "mode"); |
789 | |
790 | return 0; |
791 | |
792 | } |
793 | |
794 | /* hook function called by other driver which set reported mode */ |
795 | static void bq2415x_hook_function(enum bq2415x_mode mode, void *data) |
796 | { |
797 | struct bq2415x_device *bq = data; |
798 | |
799 | if (!bq) |
800 | return; |
801 | |
802 | dev_dbg(bq->dev, "hook function was called\n"); |
803 | bq->reported_mode = mode; |
804 | |
805 | /* if automode is not enabled do not tell about reported_mode */ |
806 | if (bq->automode < 1) |
807 | return; |
808 | |
809 | sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode"); |
810 | bq2415x_set_mode(bq, bq->reported_mode); |
811 | |
812 | } |
813 | |
814 | /**** timer functions ****/ |
815 | |
816 | /* enable/disable auto resetting chip timer */ |
817 | static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state) |
818 | { |
819 | mutex_lock(&bq2415x_timer_mutex); |
820 | |
821 | if (bq->autotimer == state) { |
822 | mutex_unlock(&bq2415x_timer_mutex); |
823 | return; |
824 | } |
825 | |
826 | bq->autotimer = state; |
827 | |
828 | if (state) { |
829 | schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); |
830 | bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
831 | bq->timer_error = NULL; |
832 | } else { |
833 | cancel_delayed_work_sync(&bq->work); |
834 | } |
835 | |
836 | mutex_unlock(&bq2415x_timer_mutex); |
837 | } |
838 | |
839 | /* called by bq2415x_timer_work on timer error */ |
840 | static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg) |
841 | { |
842 | bq->timer_error = msg; |
843 | sysfs_notify(&bq->charger.dev->kobj, NULL, "timer"); |
844 | dev_err(bq->dev, "%s\n", msg); |
845 | if (bq->automode > 0) |
846 | bq->automode = 0; |
847 | bq2415x_set_mode(bq, BQ2415X_MODE_OFF); |
848 | bq2415x_set_autotimer(bq, 0); |
849 | } |
850 | |
851 | /* delayed work function for auto resetting chip timer */ |
852 | static void bq2415x_timer_work(struct work_struct *work) |
853 | { |
854 | struct bq2415x_device *bq = container_of(work, struct bq2415x_device, |
855 | work.work); |
856 | int ret; |
857 | int error; |
858 | int boost; |
859 | |
860 | if (!bq->autotimer) |
861 | return; |
862 | |
863 | ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
864 | if (ret < 0) { |
865 | bq2415x_timer_error(bq, "Resetting timer failed"); |
866 | return; |
867 | } |
868 | |
869 | boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS); |
870 | if (boost < 0) { |
871 | bq2415x_timer_error(bq, "Unknown error"); |
872 | return; |
873 | } |
874 | |
875 | error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS); |
876 | if (error < 0) { |
877 | bq2415x_timer_error(bq, "Unknown error"); |
878 | return; |
879 | } |
880 | |
881 | if (boost) { |
882 | switch (error) { |
883 | /* Non fatal errors, chip is OK */ |
884 | case 0: /* No error */ |
885 | break; |
886 | case 6: /* Timer expired */ |
887 | dev_err(bq->dev, "Timer expired\n"); |
888 | break; |
889 | case 3: /* Battery voltage too low */ |
890 | dev_err(bq->dev, "Battery voltage to low\n"); |
891 | break; |
892 | |
893 | /* Fatal errors, disable and reset chip */ |
894 | case 1: /* Overvoltage protection (chip fried) */ |
895 | bq2415x_timer_error(bq, |
896 | "Overvoltage protection (chip fried)"); |
897 | return; |
898 | case 2: /* Overload */ |
899 | bq2415x_timer_error(bq, "Overload"); |
900 | return; |
901 | case 4: /* Battery overvoltage protection */ |
902 | bq2415x_timer_error(bq, |
903 | "Battery overvoltage protection"); |
904 | return; |
905 | case 5: /* Thermal shutdown (too hot) */ |
906 | bq2415x_timer_error(bq, |
907 | "Thermal shutdown (too hot)"); |
908 | return; |
909 | case 7: /* N/A */ |
910 | bq2415x_timer_error(bq, "Unknown error"); |
911 | return; |
912 | } |
913 | } else { |
914 | switch (error) { |
915 | /* Non fatal errors, chip is OK */ |
916 | case 0: /* No error */ |
917 | break; |
918 | case 2: /* Sleep mode */ |
919 | dev_err(bq->dev, "Sleep mode\n"); |
920 | break; |
921 | case 3: /* Poor input source */ |
922 | dev_err(bq->dev, "Poor input source\n"); |
923 | break; |
924 | case 6: /* Timer expired */ |
925 | dev_err(bq->dev, "Timer expired\n"); |
926 | break; |
927 | case 7: /* No battery */ |
928 | dev_err(bq->dev, "No battery\n"); |
929 | break; |
930 | |
931 | /* Fatal errors, disable and reset chip */ |
932 | case 1: /* Overvoltage protection (chip fried) */ |
933 | bq2415x_timer_error(bq, |
934 | "Overvoltage protection (chip fried)"); |
935 | return; |
936 | case 4: /* Battery overvoltage protection */ |
937 | bq2415x_timer_error(bq, |
938 | "Battery overvoltage protection"); |
939 | return; |
940 | case 5: /* Thermal shutdown (too hot) */ |
941 | bq2415x_timer_error(bq, |
942 | "Thermal shutdown (too hot)"); |
943 | return; |
944 | } |
945 | } |
946 | |
947 | schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ); |
948 | } |
949 | |
950 | /**** power supply interface code ****/ |
951 | |
952 | static enum power_supply_property bq2415x_power_supply_props[] = { |
953 | /* TODO: maybe add more power supply properties */ |
954 | POWER_SUPPLY_PROP_STATUS, |
955 | POWER_SUPPLY_PROP_MODEL_NAME, |
956 | }; |
957 | |
958 | static int bq2415x_power_supply_get_property(struct power_supply *psy, |
959 | enum power_supply_property psp, |
960 | union power_supply_propval *val) |
961 | { |
962 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
963 | charger); |
964 | int ret; |
965 | |
966 | switch (psp) { |
967 | case POWER_SUPPLY_PROP_STATUS: |
968 | ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS); |
969 | if (ret < 0) |
970 | return ret; |
971 | else if (ret == 0) /* Ready */ |
972 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
973 | else if (ret == 1) /* Charge in progress */ |
974 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
975 | else if (ret == 2) /* Charge done */ |
976 | val->intval = POWER_SUPPLY_STATUS_FULL; |
977 | else |
978 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
979 | break; |
980 | case POWER_SUPPLY_PROP_MODEL_NAME: |
981 | val->strval = bq->model; |
982 | break; |
983 | default: |
984 | return -EINVAL; |
985 | } |
986 | return 0; |
987 | } |
988 | |
989 | static int bq2415x_power_supply_init(struct bq2415x_device *bq) |
990 | { |
991 | int ret; |
992 | int chip; |
993 | char revstr[8]; |
994 | |
995 | bq->charger.name = bq->name; |
996 | bq->charger.type = POWER_SUPPLY_TYPE_USB; |
997 | bq->charger.properties = bq2415x_power_supply_props; |
998 | bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props); |
999 | bq->charger.get_property = bq2415x_power_supply_get_property; |
1000 | |
1001 | ret = bq2415x_detect_chip(bq); |
1002 | if (ret < 0) |
1003 | chip = BQUNKNOWN; |
1004 | else |
1005 | chip = ret; |
1006 | |
1007 | ret = bq2415x_detect_revision(bq); |
1008 | if (ret < 0) |
1009 | strcpy(revstr, "unknown"); |
1010 | else |
1011 | sprintf(revstr, "1.%d", ret); |
1012 | |
1013 | bq->model = kasprintf(GFP_KERNEL, |
1014 | "chip %s, revision %s, vender code %.3d", |
1015 | bq2415x_chip_name[chip], revstr, |
1016 | bq2415x_get_vender_code(bq)); |
1017 | if (!bq->model) { |
1018 | dev_err(bq->dev, "failed to allocate model name\n"); |
1019 | return -ENOMEM; |
1020 | } |
1021 | |
1022 | ret = power_supply_register(bq->dev, &bq->charger); |
1023 | if (ret) { |
1024 | kfree(bq->model); |
1025 | return ret; |
1026 | } |
1027 | |
1028 | return 0; |
1029 | } |
1030 | |
1031 | static void bq2415x_power_supply_exit(struct bq2415x_device *bq) |
1032 | { |
1033 | bq->autotimer = 0; |
1034 | if (bq->automode > 0) |
1035 | bq->automode = 0; |
1036 | cancel_delayed_work_sync(&bq->work); |
1037 | power_supply_unregister(&bq->charger); |
1038 | kfree(bq->model); |
1039 | } |
1040 | |
1041 | /**** additional sysfs entries for power supply interface ****/ |
1042 | |
1043 | /* show *_status entries */ |
1044 | static ssize_t bq2415x_sysfs_show_status(struct device *dev, |
1045 | struct device_attribute *attr, |
1046 | char *buf) |
1047 | { |
1048 | struct power_supply *psy = dev_get_drvdata(dev); |
1049 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1050 | charger); |
1051 | enum bq2415x_command command; |
1052 | int ret; |
1053 | |
1054 | if (strcmp(attr->attr.name, "otg_status") == 0) |
1055 | command = BQ2415X_OTG_STATUS; |
1056 | else if (strcmp(attr->attr.name, "charge_status") == 0) |
1057 | command = BQ2415X_CHARGE_STATUS; |
1058 | else if (strcmp(attr->attr.name, "boost_status") == 0) |
1059 | command = BQ2415X_BOOST_STATUS; |
1060 | else if (strcmp(attr->attr.name, "fault_status") == 0) |
1061 | command = BQ2415X_FAULT_STATUS; |
1062 | else |
1063 | return -EINVAL; |
1064 | |
1065 | ret = bq2415x_exec_command(bq, command); |
1066 | if (ret < 0) |
1067 | return ret; |
1068 | return sprintf(buf, "%d\n", ret); |
1069 | } |
1070 | |
1071 | /* |
1072 | * set timer entry: |
1073 | * auto - enable auto mode |
1074 | * off - disable auto mode |
1075 | * (other values) - reset chip timer |
1076 | */ |
1077 | static ssize_t bq2415x_sysfs_set_timer(struct device *dev, |
1078 | struct device_attribute *attr, |
1079 | const char *buf, |
1080 | size_t count) |
1081 | { |
1082 | struct power_supply *psy = dev_get_drvdata(dev); |
1083 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1084 | charger); |
1085 | int ret = 0; |
1086 | |
1087 | if (strncmp(buf, "auto", 4) == 0) |
1088 | bq2415x_set_autotimer(bq, 1); |
1089 | else if (strncmp(buf, "off", 3) == 0) |
1090 | bq2415x_set_autotimer(bq, 0); |
1091 | else |
1092 | ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET); |
1093 | |
1094 | if (ret < 0) |
1095 | return ret; |
1096 | return count; |
1097 | } |
1098 | |
1099 | /* show timer entry (auto or off) */ |
1100 | static ssize_t bq2415x_sysfs_show_timer(struct device *dev, |
1101 | struct device_attribute *attr, |
1102 | char *buf) |
1103 | { |
1104 | struct power_supply *psy = dev_get_drvdata(dev); |
1105 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1106 | charger); |
1107 | |
1108 | if (bq->timer_error) |
1109 | return sprintf(buf, "%s\n", bq->timer_error); |
1110 | |
1111 | if (bq->autotimer) |
1112 | return sprintf(buf, "auto\n"); |
1113 | return sprintf(buf, "off\n"); |
1114 | } |
1115 | |
1116 | /* |
1117 | * set mode entry: |
1118 | * auto - if automode is supported, enable it and set mode to reported |
1119 | * none - disable charger and boost mode |
1120 | * host - charging mode for host/hub chargers (current limit 500mA) |
1121 | * dedicated - charging mode for dedicated chargers (unlimited current limit) |
1122 | * boost - disable charger and enable boost mode |
1123 | */ |
1124 | static ssize_t bq2415x_sysfs_set_mode(struct device *dev, |
1125 | struct device_attribute *attr, |
1126 | const char *buf, |
1127 | size_t count) |
1128 | { |
1129 | struct power_supply *psy = dev_get_drvdata(dev); |
1130 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1131 | charger); |
1132 | enum bq2415x_mode mode; |
1133 | int ret = 0; |
1134 | |
1135 | if (strncmp(buf, "auto", 4) == 0) { |
1136 | if (bq->automode < 0) |
1137 | return -ENOSYS; |
1138 | bq->automode = 1; |
1139 | mode = bq->reported_mode; |
1140 | } else if (strncmp(buf, "off", 3) == 0) { |
1141 | if (bq->automode > 0) |
1142 | bq->automode = 0; |
1143 | mode = BQ2415X_MODE_OFF; |
1144 | } else if (strncmp(buf, "none", 4) == 0) { |
1145 | if (bq->automode > 0) |
1146 | bq->automode = 0; |
1147 | mode = BQ2415X_MODE_NONE; |
1148 | } else if (strncmp(buf, "host", 4) == 0) { |
1149 | if (bq->automode > 0) |
1150 | bq->automode = 0; |
1151 | mode = BQ2415X_MODE_HOST_CHARGER; |
1152 | } else if (strncmp(buf, "dedicated", 9) == 0) { |
1153 | if (bq->automode > 0) |
1154 | bq->automode = 0; |
1155 | mode = BQ2415X_MODE_DEDICATED_CHARGER; |
1156 | } else if (strncmp(buf, "boost", 5) == 0) { |
1157 | if (bq->automode > 0) |
1158 | bq->automode = 0; |
1159 | mode = BQ2415X_MODE_BOOST; |
1160 | } else if (strncmp(buf, "reset", 5) == 0) { |
1161 | bq2415x_reset_chip(bq); |
1162 | bq2415x_set_defaults(bq); |
1163 | if (bq->automode <= 0) |
1164 | return count; |
1165 | bq->automode = 1; |
1166 | mode = bq->reported_mode; |
1167 | } else { |
1168 | return -EINVAL; |
1169 | } |
1170 | |
1171 | ret = bq2415x_set_mode(bq, mode); |
1172 | if (ret < 0) |
1173 | return ret; |
1174 | return count; |
1175 | } |
1176 | |
1177 | /* show mode entry (auto, none, host, dedicated or boost) */ |
1178 | static ssize_t bq2415x_sysfs_show_mode(struct device *dev, |
1179 | struct device_attribute *attr, |
1180 | char *buf) |
1181 | { |
1182 | struct power_supply *psy = dev_get_drvdata(dev); |
1183 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1184 | charger); |
1185 | ssize_t ret = 0; |
1186 | |
1187 | if (bq->automode > 0) |
1188 | ret += sprintf(buf+ret, "auto ("); |
1189 | |
1190 | switch (bq->mode) { |
1191 | case BQ2415X_MODE_OFF: |
1192 | ret += sprintf(buf+ret, "off"); |
1193 | break; |
1194 | case BQ2415X_MODE_NONE: |
1195 | ret += sprintf(buf+ret, "none"); |
1196 | break; |
1197 | case BQ2415X_MODE_HOST_CHARGER: |
1198 | ret += sprintf(buf+ret, "host"); |
1199 | break; |
1200 | case BQ2415X_MODE_DEDICATED_CHARGER: |
1201 | ret += sprintf(buf+ret, "dedicated"); |
1202 | break; |
1203 | case BQ2415X_MODE_BOOST: |
1204 | ret += sprintf(buf+ret, "boost"); |
1205 | break; |
1206 | } |
1207 | |
1208 | if (bq->automode > 0) |
1209 | ret += sprintf(buf+ret, ")"); |
1210 | |
1211 | ret += sprintf(buf+ret, "\n"); |
1212 | return ret; |
1213 | } |
1214 | |
1215 | /* show reported_mode entry (none, host, dedicated or boost) */ |
1216 | static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev, |
1217 | struct device_attribute *attr, |
1218 | char *buf) |
1219 | { |
1220 | struct power_supply *psy = dev_get_drvdata(dev); |
1221 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1222 | charger); |
1223 | |
1224 | if (bq->automode < 0) |
1225 | return -EINVAL; |
1226 | |
1227 | switch (bq->reported_mode) { |
1228 | case BQ2415X_MODE_OFF: |
1229 | return sprintf(buf, "off\n"); |
1230 | case BQ2415X_MODE_NONE: |
1231 | return sprintf(buf, "none\n"); |
1232 | case BQ2415X_MODE_HOST_CHARGER: |
1233 | return sprintf(buf, "host\n"); |
1234 | case BQ2415X_MODE_DEDICATED_CHARGER: |
1235 | return sprintf(buf, "dedicated\n"); |
1236 | case BQ2415X_MODE_BOOST: |
1237 | return sprintf(buf, "boost\n"); |
1238 | } |
1239 | |
1240 | return -EINVAL; |
1241 | } |
1242 | |
1243 | /* directly set raw value to chip register, format: 'register value' */ |
1244 | static ssize_t bq2415x_sysfs_set_registers(struct device *dev, |
1245 | struct device_attribute *attr, |
1246 | const char *buf, |
1247 | size_t count) |
1248 | { |
1249 | struct power_supply *psy = dev_get_drvdata(dev); |
1250 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1251 | charger); |
1252 | ssize_t ret = 0; |
1253 | unsigned int reg; |
1254 | unsigned int val; |
1255 | |
1256 | if (sscanf(buf, "%x %x", ®, &val) != 2) |
1257 | return -EINVAL; |
1258 | |
1259 | if (reg > 4 || val > 255) |
1260 | return -EINVAL; |
1261 | |
1262 | ret = bq2415x_i2c_write(bq, reg, val); |
1263 | if (ret < 0) |
1264 | return ret; |
1265 | return count; |
1266 | } |
1267 | |
1268 | /* print value of chip register, format: 'register=value' */ |
1269 | static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq, |
1270 | u8 reg, |
1271 | char *buf) |
1272 | { |
1273 | int ret = bq2415x_i2c_read(bq, reg); |
1274 | |
1275 | if (ret < 0) |
1276 | return sprintf(buf, "%#.2x=error %d\n", reg, ret); |
1277 | return sprintf(buf, "%#.2x=%#.2x\n", reg, ret); |
1278 | } |
1279 | |
1280 | /* show all raw values of chip register, format per line: 'register=value' */ |
1281 | static ssize_t bq2415x_sysfs_show_registers(struct device *dev, |
1282 | struct device_attribute *attr, |
1283 | char *buf) |
1284 | { |
1285 | struct power_supply *psy = dev_get_drvdata(dev); |
1286 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1287 | charger); |
1288 | ssize_t ret = 0; |
1289 | |
1290 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret); |
1291 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret); |
1292 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret); |
1293 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret); |
1294 | ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret); |
1295 | return ret; |
1296 | } |
1297 | |
1298 | /* set current and voltage limit entries (in mA or mV) */ |
1299 | static ssize_t bq2415x_sysfs_set_limit(struct device *dev, |
1300 | struct device_attribute *attr, |
1301 | const char *buf, |
1302 | size_t count) |
1303 | { |
1304 | struct power_supply *psy = dev_get_drvdata(dev); |
1305 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1306 | charger); |
1307 | long val; |
1308 | int ret; |
1309 | |
1310 | if (kstrtol(buf, 10, &val) < 0) |
1311 | return -EINVAL; |
1312 | |
1313 | if (strcmp(attr->attr.name, "current_limit") == 0) |
1314 | ret = bq2415x_set_current_limit(bq, val); |
1315 | else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) |
1316 | ret = bq2415x_set_weak_battery_voltage(bq, val); |
1317 | else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) |
1318 | ret = bq2415x_set_battery_regulation_voltage(bq, val); |
1319 | else if (strcmp(attr->attr.name, "charge_current") == 0) |
1320 | ret = bq2415x_set_charge_current(bq, val); |
1321 | else if (strcmp(attr->attr.name, "termination_current") == 0) |
1322 | ret = bq2415x_set_termination_current(bq, val); |
1323 | else |
1324 | return -EINVAL; |
1325 | |
1326 | if (ret < 0) |
1327 | return ret; |
1328 | return count; |
1329 | } |
1330 | |
1331 | /* show current and voltage limit entries (in mA or mV) */ |
1332 | static ssize_t bq2415x_sysfs_show_limit(struct device *dev, |
1333 | struct device_attribute *attr, |
1334 | char *buf) |
1335 | { |
1336 | struct power_supply *psy = dev_get_drvdata(dev); |
1337 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1338 | charger); |
1339 | int ret; |
1340 | |
1341 | if (strcmp(attr->attr.name, "current_limit") == 0) |
1342 | ret = bq2415x_get_current_limit(bq); |
1343 | else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0) |
1344 | ret = bq2415x_get_weak_battery_voltage(bq); |
1345 | else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0) |
1346 | ret = bq2415x_get_battery_regulation_voltage(bq); |
1347 | else if (strcmp(attr->attr.name, "charge_current") == 0) |
1348 | ret = bq2415x_get_charge_current(bq); |
1349 | else if (strcmp(attr->attr.name, "termination_current") == 0) |
1350 | ret = bq2415x_get_termination_current(bq); |
1351 | else |
1352 | return -EINVAL; |
1353 | |
1354 | if (ret < 0) |
1355 | return ret; |
1356 | return sprintf(buf, "%d\n", ret); |
1357 | } |
1358 | |
1359 | /* set *_enable entries */ |
1360 | static ssize_t bq2415x_sysfs_set_enable(struct device *dev, |
1361 | struct device_attribute *attr, |
1362 | const char *buf, |
1363 | size_t count) |
1364 | { |
1365 | struct power_supply *psy = dev_get_drvdata(dev); |
1366 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1367 | charger); |
1368 | enum bq2415x_command command; |
1369 | long val; |
1370 | int ret; |
1371 | |
1372 | if (kstrtol(buf, 10, &val) < 0) |
1373 | return -EINVAL; |
1374 | |
1375 | if (strcmp(attr->attr.name, "charge_termination_enable") == 0) |
1376 | command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE : |
1377 | BQ2415X_CHARGE_TERMINATION_DISABLE; |
1378 | else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
1379 | command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE : |
1380 | BQ2415X_HIGH_IMPEDANCE_DISABLE; |
1381 | else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) |
1382 | command = val ? BQ2415X_OTG_PIN_ENABLE : |
1383 | BQ2415X_OTG_PIN_DISABLE; |
1384 | else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) |
1385 | command = val ? BQ2415X_STAT_PIN_ENABLE : |
1386 | BQ2415X_STAT_PIN_DISABLE; |
1387 | else |
1388 | return -EINVAL; |
1389 | |
1390 | ret = bq2415x_exec_command(bq, command); |
1391 | if (ret < 0) |
1392 | return ret; |
1393 | return count; |
1394 | } |
1395 | |
1396 | /* show *_enable entries */ |
1397 | static ssize_t bq2415x_sysfs_show_enable(struct device *dev, |
1398 | struct device_attribute *attr, |
1399 | char *buf) |
1400 | { |
1401 | struct power_supply *psy = dev_get_drvdata(dev); |
1402 | struct bq2415x_device *bq = container_of(psy, struct bq2415x_device, |
1403 | charger); |
1404 | enum bq2415x_command command; |
1405 | int ret; |
1406 | |
1407 | if (strcmp(attr->attr.name, "charge_termination_enable") == 0) |
1408 | command = BQ2415X_CHARGE_TERMINATION_STATUS; |
1409 | else if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
1410 | command = BQ2415X_HIGH_IMPEDANCE_STATUS; |
1411 | else if (strcmp(attr->attr.name, "otg_pin_enable") == 0) |
1412 | command = BQ2415X_OTG_PIN_STATUS; |
1413 | else if (strcmp(attr->attr.name, "stat_pin_enable") == 0) |
1414 | command = BQ2415X_STAT_PIN_STATUS; |
1415 | else |
1416 | return -EINVAL; |
1417 | |
1418 | ret = bq2415x_exec_command(bq, command); |
1419 | if (ret < 0) |
1420 | return ret; |
1421 | return sprintf(buf, "%d\n", ret); |
1422 | } |
1423 | |
1424 | static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO, |
1425 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
1426 | static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO, |
1427 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
1428 | static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO, |
1429 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
1430 | static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO, |
1431 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
1432 | static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO, |
1433 | bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit); |
1434 | |
1435 | static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO, |
1436 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
1437 | static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, |
1438 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
1439 | static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO, |
1440 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
1441 | static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO, |
1442 | bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable); |
1443 | |
1444 | static DEVICE_ATTR(reported_mode, S_IRUGO, |
1445 | bq2415x_sysfs_show_reported_mode, NULL); |
1446 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, |
1447 | bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode); |
1448 | static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO, |
1449 | bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer); |
1450 | |
1451 | static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO, |
1452 | bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers); |
1453 | |
1454 | static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
1455 | static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
1456 | static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
1457 | static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL); |
1458 | |
1459 | static struct attribute *bq2415x_sysfs_attributes[] = { |
1460 | /* |
1461 | * TODO: some (appropriate) of these attrs should be switched to |
1462 | * use power supply class props. |
1463 | */ |
1464 | &dev_attr_current_limit.attr, |
1465 | &dev_attr_weak_battery_voltage.attr, |
1466 | &dev_attr_battery_regulation_voltage.attr, |
1467 | &dev_attr_charge_current.attr, |
1468 | &dev_attr_termination_current.attr, |
1469 | |
1470 | &dev_attr_charge_termination_enable.attr, |
1471 | &dev_attr_high_impedance_enable.attr, |
1472 | &dev_attr_otg_pin_enable.attr, |
1473 | &dev_attr_stat_pin_enable.attr, |
1474 | |
1475 | &dev_attr_reported_mode.attr, |
1476 | &dev_attr_mode.attr, |
1477 | &dev_attr_timer.attr, |
1478 | |
1479 | &dev_attr_registers.attr, |
1480 | |
1481 | &dev_attr_otg_status.attr, |
1482 | &dev_attr_charge_status.attr, |
1483 | &dev_attr_boost_status.attr, |
1484 | &dev_attr_fault_status.attr, |
1485 | NULL, |
1486 | }; |
1487 | |
1488 | static const struct attribute_group bq2415x_sysfs_attr_group = { |
1489 | .attrs = bq2415x_sysfs_attributes, |
1490 | }; |
1491 | |
1492 | static int bq2415x_sysfs_init(struct bq2415x_device *bq) |
1493 | { |
1494 | return sysfs_create_group(&bq->charger.dev->kobj, |
1495 | &bq2415x_sysfs_attr_group); |
1496 | } |
1497 | |
1498 | static void bq2415x_sysfs_exit(struct bq2415x_device *bq) |
1499 | { |
1500 | sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group); |
1501 | } |
1502 | |
1503 | /* main bq2415x probe function */ |
1504 | static int bq2415x_probe(struct i2c_client *client, |
1505 | const struct i2c_device_id *id) |
1506 | { |
1507 | int ret; |
1508 | int num; |
1509 | char *name; |
1510 | struct bq2415x_device *bq; |
1511 | |
1512 | if (!client->dev.platform_data) { |
1513 | dev_err(&client->dev, "platform data not set\n"); |
1514 | return -ENODEV; |
1515 | } |
1516 | |
1517 | /* Get new ID for the new device */ |
1518 | mutex_lock(&bq2415x_id_mutex); |
1519 | num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL); |
1520 | mutex_unlock(&bq2415x_id_mutex); |
1521 | if (num < 0) |
1522 | return num; |
1523 | |
1524 | name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); |
1525 | if (!name) { |
1526 | dev_err(&client->dev, "failed to allocate device name\n"); |
1527 | ret = -ENOMEM; |
1528 | goto error_1; |
1529 | } |
1530 | |
1531 | bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL); |
1532 | if (!bq) { |
1533 | dev_err(&client->dev, "failed to allocate device data\n"); |
1534 | ret = -ENOMEM; |
1535 | goto error_2; |
1536 | } |
1537 | |
1538 | i2c_set_clientdata(client, bq); |
1539 | |
1540 | bq->id = num; |
1541 | bq->dev = &client->dev; |
1542 | bq->chip = id->driver_data; |
1543 | bq->name = name; |
1544 | bq->mode = BQ2415X_MODE_OFF; |
1545 | bq->reported_mode = BQ2415X_MODE_OFF; |
1546 | bq->autotimer = 0; |
1547 | bq->automode = 0; |
1548 | |
1549 | memcpy(&bq->init_data, client->dev.platform_data, |
1550 | sizeof(bq->init_data)); |
1551 | |
1552 | bq2415x_reset_chip(bq); |
1553 | |
1554 | ret = bq2415x_power_supply_init(bq); |
1555 | if (ret) { |
1556 | dev_err(bq->dev, "failed to register power supply: %d\n", ret); |
1557 | goto error_2; |
1558 | } |
1559 | |
1560 | ret = bq2415x_sysfs_init(bq); |
1561 | if (ret) { |
1562 | dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret); |
1563 | goto error_3; |
1564 | } |
1565 | |
1566 | ret = bq2415x_set_defaults(bq); |
1567 | if (ret) { |
1568 | dev_err(bq->dev, "failed to set default values: %d\n", ret); |
1569 | goto error_4; |
1570 | } |
1571 | |
1572 | if (bq->init_data.set_mode_hook) { |
1573 | if (bq->init_data.set_mode_hook( |
1574 | bq2415x_hook_function, bq)) { |
1575 | bq->automode = 1; |
1576 | bq2415x_set_mode(bq, bq->reported_mode); |
1577 | dev_info(bq->dev, "automode enabled\n"); |
1578 | } else { |
1579 | bq->automode = -1; |
1580 | dev_info(bq->dev, "automode failed\n"); |
1581 | } |
1582 | } else { |
1583 | bq->automode = -1; |
1584 | dev_info(bq->dev, "automode not supported\n"); |
1585 | } |
1586 | |
1587 | INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work); |
1588 | bq2415x_set_autotimer(bq, 1); |
1589 | |
1590 | dev_info(bq->dev, "driver registered\n"); |
1591 | return 0; |
1592 | |
1593 | error_4: |
1594 | bq2415x_sysfs_exit(bq); |
1595 | error_3: |
1596 | bq2415x_power_supply_exit(bq); |
1597 | error_2: |
1598 | kfree(name); |
1599 | error_1: |
1600 | mutex_lock(&bq2415x_id_mutex); |
1601 | idr_remove(&bq2415x_id, num); |
1602 | mutex_unlock(&bq2415x_id_mutex); |
1603 | |
1604 | return ret; |
1605 | } |
1606 | |
1607 | /* main bq2415x remove function */ |
1608 | |
1609 | static int bq2415x_remove(struct i2c_client *client) |
1610 | { |
1611 | struct bq2415x_device *bq = i2c_get_clientdata(client); |
1612 | |
1613 | if (bq->init_data.set_mode_hook) |
1614 | bq->init_data.set_mode_hook(NULL, NULL); |
1615 | |
1616 | bq2415x_sysfs_exit(bq); |
1617 | bq2415x_power_supply_exit(bq); |
1618 | |
1619 | bq2415x_reset_chip(bq); |
1620 | |
1621 | mutex_lock(&bq2415x_id_mutex); |
1622 | idr_remove(&bq2415x_id, bq->id); |
1623 | mutex_unlock(&bq2415x_id_mutex); |
1624 | |
1625 | dev_info(bq->dev, "driver unregistered\n"); |
1626 | |
1627 | kfree(bq->name); |
1628 | |
1629 | return 0; |
1630 | } |
1631 | |
1632 | static const struct i2c_device_id bq2415x_i2c_id_table[] = { |
1633 | { "bq2415x", BQUNKNOWN }, |
1634 | { "bq24150", BQ24150 }, |
1635 | { "bq24150a", BQ24150A }, |
1636 | { "bq24151", BQ24151 }, |
1637 | { "bq24151a", BQ24151A }, |
1638 | { "bq24152", BQ24152 }, |
1639 | { "bq24153", BQ24153 }, |
1640 | { "bq24153a", BQ24153A }, |
1641 | { "bq24155", BQ24155 }, |
1642 | { "bq24156", BQ24156 }, |
1643 | { "bq24156a", BQ24156A }, |
1644 | { "bq24158", BQ24158 }, |
1645 | {}, |
1646 | }; |
1647 | MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table); |
1648 | |
1649 | static struct i2c_driver bq2415x_driver = { |
1650 | .driver = { |
1651 | .name = "bq2415x-charger", |
1652 | }, |
1653 | .probe = bq2415x_probe, |
1654 | .remove = bq2415x_remove, |
1655 | .id_table = bq2415x_i2c_id_table, |
1656 | }; |
1657 | module_i2c_driver(bq2415x_driver); |
1658 | |
1659 | MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
1660 | MODULE_DESCRIPTION("bq2415x charger driver"); |
1661 | MODULE_LICENSE("GPL"); |
1662 |
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v2.6.34-rc5
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