1 /*
2 * bq2415x charger driver
3 *
4 * Copyright (C) 2011-2013 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 * Datasheets:
17 * http://www.ti.com/product/bq24150
18 * http://www.ti.com/product/bq24150a
19 * http://www.ti.com/product/bq24152
20 * http://www.ti.com/product/bq24153
21 * http://www.ti.com/product/bq24153a
22 * http://www.ti.com/product/bq24155
23 * http://www.ti.com/product/bq24157s
24 * http://www.ti.com/product/bq24158
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/param.h>
30 #include <linux/err.h>
31 #include <linux/workqueue.h>
32 #include <linux/sysfs.h>
33 #include <linux/platform_device.h>
34 #include <linux/power_supply.h>
35 #include <linux/idr.h>
36 #include <linux/i2c.h>
37 #include <linux/slab.h>
38 #include <linux/acpi.h>
39
40 #include <linux/power/bq2415x_charger.h>
41
42 /* timeout for resetting chip timer */
43 #define BQ2415X_TIMER_TIMEOUT 10
44
45 #define BQ2415X_REG_STATUS 0x00
46 #define BQ2415X_REG_CONTROL 0x01
47 #define BQ2415X_REG_VOLTAGE 0x02
48 #define BQ2415X_REG_VENDER 0x03
49 #define BQ2415X_REG_CURRENT 0x04
50
51 /* reset state for all registers */
52 #define BQ2415X_RESET_STATUS BIT(6)
53 #define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
54 #define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
55 #define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
56
57 /* status register */
58 #define BQ2415X_BIT_TMR_RST 7
59 #define BQ2415X_BIT_OTG 7
60 #define BQ2415X_BIT_EN_STAT 6
61 #define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
62 #define BQ2415X_SHIFT_STAT 4
63 #define BQ2415X_BIT_BOOST 3
64 #define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
65 #define BQ2415X_SHIFT_FAULT 0
66
67 /* control register */
68 #define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
69 #define BQ2415X_SHIFT_LIMIT 6
70 #define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
71 #define BQ2415X_SHIFT_VLOWV 4
72 #define BQ2415X_BIT_TE 3
73 #define BQ2415X_BIT_CE 2
74 #define BQ2415X_BIT_HZ_MODE 1
75 #define BQ2415X_BIT_OPA_MODE 0
76
77 /* voltage register */
78 #define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
79 #define BQ2415X_SHIFT_VO 2
80 #define BQ2415X_BIT_OTG_PL 1
81 #define BQ2415X_BIT_OTG_EN 0
82
83 /* vender register */
84 #define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
85 #define BQ2415X_SHIFT_VENDER 5
86 #define BQ2415X_MASK_PN (BIT(3)|BIT(4))
87 #define BQ2415X_SHIFT_PN 3
88 #define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
89 #define BQ2415X_SHIFT_REVISION 0
90
91 /* current register */
92 #define BQ2415X_MASK_RESET BIT(7)
93 #define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6))
94 #define BQ2415X_SHIFT_VI_CHRG 4
95 /* N/A BIT(3) */
96 #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2))
97 #define BQ2415X_SHIFT_VI_TERM 0
98
99
100 enum bq2415x_command {
101 BQ2415X_TIMER_RESET,
102 BQ2415X_OTG_STATUS,
103 BQ2415X_STAT_PIN_STATUS,
104 BQ2415X_STAT_PIN_ENABLE,
105 BQ2415X_STAT_PIN_DISABLE,
106 BQ2415X_CHARGE_STATUS,
107 BQ2415X_BOOST_STATUS,
108 BQ2415X_FAULT_STATUS,
109
110 BQ2415X_CHARGE_TERMINATION_STATUS,
111 BQ2415X_CHARGE_TERMINATION_ENABLE,
112 BQ2415X_CHARGE_TERMINATION_DISABLE,
113 BQ2415X_CHARGER_STATUS,
114 BQ2415X_CHARGER_ENABLE,
115 BQ2415X_CHARGER_DISABLE,
116 BQ2415X_HIGH_IMPEDANCE_STATUS,
117 BQ2415X_HIGH_IMPEDANCE_ENABLE,
118 BQ2415X_HIGH_IMPEDANCE_DISABLE,
119 BQ2415X_BOOST_MODE_STATUS,
120 BQ2415X_BOOST_MODE_ENABLE,
121 BQ2415X_BOOST_MODE_DISABLE,
122
123 BQ2415X_OTG_LEVEL,
124 BQ2415X_OTG_ACTIVATE_HIGH,
125 BQ2415X_OTG_ACTIVATE_LOW,
126 BQ2415X_OTG_PIN_STATUS,
127 BQ2415X_OTG_PIN_ENABLE,
128 BQ2415X_OTG_PIN_DISABLE,
129
130 BQ2415X_VENDER_CODE,
131 BQ2415X_PART_NUMBER,
132 BQ2415X_REVISION,
133 };
134
135 enum bq2415x_chip {
136 BQUNKNOWN,
137 BQ24150,
138 BQ24150A,
139 BQ24151,
140 BQ24151A,
141 BQ24152,
142 BQ24153,
143 BQ24153A,
144 BQ24155,
145 BQ24156,
146 BQ24156A,
147 BQ24157S,
148 BQ24158,
149 };
150
151 static char *bq2415x_chip_name[] = {
152 "unknown",
153 "bq24150",
154 "bq24150a",
155 "bq24151",
156 "bq24151a",
157 "bq24152",
158 "bq24153",
159 "bq24153a",
160 "bq24155",
161 "bq24156",
162 "bq24156a",
163 "bq24157s",
164 "bq24158",
165 };
166
167 struct bq2415x_device {
168 struct device *dev;
169 struct bq2415x_platform_data init_data;
170 struct power_supply *charger;
171 struct power_supply_desc charger_desc;
172 struct delayed_work work;
173 struct device_node *notify_node;
174 struct notifier_block nb;
175 enum bq2415x_mode reported_mode;/* mode reported by hook function */
176 enum bq2415x_mode mode; /* currently configured mode */
177 enum bq2415x_chip chip;
178 const char *timer_error;
179 char *model;
180 char *name;
181 int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
182 int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
183 int id;
184 };
185
186 /* each registered chip must have unique id */
187 static DEFINE_IDR(bq2415x_id);
188
189 static DEFINE_MUTEX(bq2415x_id_mutex);
190 static DEFINE_MUTEX(bq2415x_timer_mutex);
191 static DEFINE_MUTEX(bq2415x_i2c_mutex);
192
193 /**** i2c read functions ****/
194
195 /* read value from register */
bq2415x_i2c_read(struct bq2415x_device * bq,u8 reg)196 static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
197 {
198 struct i2c_client *client = to_i2c_client(bq->dev);
199 struct i2c_msg msg[2];
200 u8 val;
201 int ret;
202
203 if (!client->adapter)
204 return -ENODEV;
205
206 msg[0].addr = client->addr;
207 msg[0].flags = 0;
208 msg[0].buf = ®
209 msg[0].len = sizeof(reg);
210 msg[1].addr = client->addr;
211 msg[1].flags = I2C_M_RD;
212 msg[1].buf = &val;
213 msg[1].len = sizeof(val);
214
215 mutex_lock(&bq2415x_i2c_mutex);
216 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
217 mutex_unlock(&bq2415x_i2c_mutex);
218
219 if (ret < 0)
220 return ret;
221
222 return val;
223 }
224
225 /* read value from register, apply mask and right shift it */
bq2415x_i2c_read_mask(struct bq2415x_device * bq,u8 reg,u8 mask,u8 shift)226 static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
227 u8 mask, u8 shift)
228 {
229 int ret;
230
231 if (shift > 8)
232 return -EINVAL;
233
234 ret = bq2415x_i2c_read(bq, reg);
235 if (ret < 0)
236 return ret;
237 return (ret & mask) >> shift;
238 }
239
240 /* read value from register and return one specified bit */
bq2415x_i2c_read_bit(struct bq2415x_device * bq,u8 reg,u8 bit)241 static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
242 {
243 if (bit > 8)
244 return -EINVAL;
245 return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
246 }
247
248 /**** i2c write functions ****/
249
250 /* write value to register */
bq2415x_i2c_write(struct bq2415x_device * bq,u8 reg,u8 val)251 static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
252 {
253 struct i2c_client *client = to_i2c_client(bq->dev);
254 struct i2c_msg msg[1];
255 u8 data[2];
256 int ret;
257
258 data[0] = reg;
259 data[1] = val;
260
261 msg[0].addr = client->addr;
262 msg[0].flags = 0;
263 msg[0].buf = data;
264 msg[0].len = ARRAY_SIZE(data);
265
266 mutex_lock(&bq2415x_i2c_mutex);
267 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
268 mutex_unlock(&bq2415x_i2c_mutex);
269
270 /* i2c_transfer returns number of messages transferred */
271 if (ret < 0)
272 return ret;
273 else if (ret != 1)
274 return -EIO;
275
276 return 0;
277 }
278
279 /* read value from register, change it with mask left shifted and write back */
bq2415x_i2c_write_mask(struct bq2415x_device * bq,u8 reg,u8 val,u8 mask,u8 shift)280 static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
281 u8 mask, u8 shift)
282 {
283 int ret;
284
285 if (shift > 8)
286 return -EINVAL;
287
288 ret = bq2415x_i2c_read(bq, reg);
289 if (ret < 0)
290 return ret;
291
292 ret &= ~mask;
293 ret |= val << shift;
294
295 return bq2415x_i2c_write(bq, reg, ret);
296 }
297
298 /* change only one bit in register */
bq2415x_i2c_write_bit(struct bq2415x_device * bq,u8 reg,bool val,u8 bit)299 static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
300 bool val, u8 bit)
301 {
302 if (bit > 8)
303 return -EINVAL;
304 return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
305 }
306
307 /**** global functions ****/
308
309 /* exec command function */
bq2415x_exec_command(struct bq2415x_device * bq,enum bq2415x_command command)310 static int bq2415x_exec_command(struct bq2415x_device *bq,
311 enum bq2415x_command command)
312 {
313 int ret;
314
315 switch (command) {
316 case BQ2415X_TIMER_RESET:
317 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
318 1, BQ2415X_BIT_TMR_RST);
319 case BQ2415X_OTG_STATUS:
320 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
321 BQ2415X_BIT_OTG);
322 case BQ2415X_STAT_PIN_STATUS:
323 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
324 BQ2415X_BIT_EN_STAT);
325 case BQ2415X_STAT_PIN_ENABLE:
326 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
327 BQ2415X_BIT_EN_STAT);
328 case BQ2415X_STAT_PIN_DISABLE:
329 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
330 BQ2415X_BIT_EN_STAT);
331 case BQ2415X_CHARGE_STATUS:
332 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
333 BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
334 case BQ2415X_BOOST_STATUS:
335 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
336 BQ2415X_BIT_BOOST);
337 case BQ2415X_FAULT_STATUS:
338 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
339 BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
340
341 case BQ2415X_CHARGE_TERMINATION_STATUS:
342 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
343 BQ2415X_BIT_TE);
344 case BQ2415X_CHARGE_TERMINATION_ENABLE:
345 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
346 1, BQ2415X_BIT_TE);
347 case BQ2415X_CHARGE_TERMINATION_DISABLE:
348 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
349 0, BQ2415X_BIT_TE);
350 case BQ2415X_CHARGER_STATUS:
351 ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
352 BQ2415X_BIT_CE);
353 if (ret < 0)
354 return ret;
355 return ret > 0 ? 0 : 1;
356 case BQ2415X_CHARGER_ENABLE:
357 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
358 0, BQ2415X_BIT_CE);
359 case BQ2415X_CHARGER_DISABLE:
360 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
361 1, BQ2415X_BIT_CE);
362 case BQ2415X_HIGH_IMPEDANCE_STATUS:
363 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
364 BQ2415X_BIT_HZ_MODE);
365 case BQ2415X_HIGH_IMPEDANCE_ENABLE:
366 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
367 1, BQ2415X_BIT_HZ_MODE);
368 case BQ2415X_HIGH_IMPEDANCE_DISABLE:
369 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
370 0, BQ2415X_BIT_HZ_MODE);
371 case BQ2415X_BOOST_MODE_STATUS:
372 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
373 BQ2415X_BIT_OPA_MODE);
374 case BQ2415X_BOOST_MODE_ENABLE:
375 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
376 1, BQ2415X_BIT_OPA_MODE);
377 case BQ2415X_BOOST_MODE_DISABLE:
378 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
379 0, BQ2415X_BIT_OPA_MODE);
380
381 case BQ2415X_OTG_LEVEL:
382 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
383 BQ2415X_BIT_OTG_PL);
384 case BQ2415X_OTG_ACTIVATE_HIGH:
385 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
386 1, BQ2415X_BIT_OTG_PL);
387 case BQ2415X_OTG_ACTIVATE_LOW:
388 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
389 0, BQ2415X_BIT_OTG_PL);
390 case BQ2415X_OTG_PIN_STATUS:
391 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
392 BQ2415X_BIT_OTG_EN);
393 case BQ2415X_OTG_PIN_ENABLE:
394 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
395 1, BQ2415X_BIT_OTG_EN);
396 case BQ2415X_OTG_PIN_DISABLE:
397 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
398 0, BQ2415X_BIT_OTG_EN);
399
400 case BQ2415X_VENDER_CODE:
401 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
402 BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
403 case BQ2415X_PART_NUMBER:
404 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
405 BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
406 case BQ2415X_REVISION:
407 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
408 BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
409 }
410 return -EINVAL;
411 }
412
413 /* detect chip type */
bq2415x_detect_chip(struct bq2415x_device * bq)414 static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
415 {
416 struct i2c_client *client = to_i2c_client(bq->dev);
417 int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
418
419 if (ret < 0)
420 return ret;
421
422 switch (client->addr) {
423 case 0x6b:
424 switch (ret) {
425 case 0:
426 if (bq->chip == BQ24151A)
427 return bq->chip;
428 return BQ24151;
429 case 1:
430 if (bq->chip == BQ24150A ||
431 bq->chip == BQ24152 ||
432 bq->chip == BQ24155)
433 return bq->chip;
434 return BQ24150;
435 case 2:
436 if (bq->chip == BQ24153A)
437 return bq->chip;
438 return BQ24153;
439 default:
440 return BQUNKNOWN;
441 }
442 break;
443
444 case 0x6a:
445 switch (ret) {
446 case 0:
447 if (bq->chip == BQ24156A)
448 return bq->chip;
449 return BQ24156;
450 case 2:
451 if (bq->chip == BQ24157S)
452 return bq->chip;
453 return BQ24158;
454 default:
455 return BQUNKNOWN;
456 }
457 break;
458 }
459
460 return BQUNKNOWN;
461 }
462
463 /* detect chip revision */
bq2415x_detect_revision(struct bq2415x_device * bq)464 static int bq2415x_detect_revision(struct bq2415x_device *bq)
465 {
466 int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
467 int chip = bq2415x_detect_chip(bq);
468
469 if (ret < 0 || chip < 0)
470 return -1;
471
472 switch (chip) {
473 case BQ24150:
474 case BQ24150A:
475 case BQ24151:
476 case BQ24151A:
477 case BQ24152:
478 if (ret >= 0 && ret <= 3)
479 return ret;
480 return -1;
481 case BQ24153:
482 case BQ24153A:
483 case BQ24156:
484 case BQ24156A:
485 case BQ24157S:
486 case BQ24158:
487 if (ret == 3)
488 return 0;
489 else if (ret == 1)
490 return 1;
491 return -1;
492 case BQ24155:
493 if (ret == 3)
494 return 3;
495 return -1;
496 case BQUNKNOWN:
497 return -1;
498 }
499
500 return -1;
501 }
502
503 /* return chip vender code */
bq2415x_get_vender_code(struct bq2415x_device * bq)504 static int bq2415x_get_vender_code(struct bq2415x_device *bq)
505 {
506 int ret;
507
508 ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
509 if (ret < 0)
510 return 0;
511
512 /* convert to binary */
513 return (ret & 0x1) +
514 ((ret >> 1) & 0x1) * 10 +
515 ((ret >> 2) & 0x1) * 100;
516 }
517
518 /* reset all chip registers to default state */
bq2415x_reset_chip(struct bq2415x_device * bq)519 static void bq2415x_reset_chip(struct bq2415x_device *bq)
520 {
521 bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
522 bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
523 bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
524 bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
525 bq->timer_error = NULL;
526 }
527
528 /**** properties functions ****/
529
530 /* set current limit in mA */
bq2415x_set_current_limit(struct bq2415x_device * bq,int mA)531 static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
532 {
533 int val;
534
535 if (mA <= 100)
536 val = 0;
537 else if (mA <= 500)
538 val = 1;
539 else if (mA <= 800)
540 val = 2;
541 else
542 val = 3;
543
544 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
545 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
546 }
547
548 /* get current limit in mA */
bq2415x_get_current_limit(struct bq2415x_device * bq)549 static int bq2415x_get_current_limit(struct bq2415x_device *bq)
550 {
551 int ret;
552
553 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
554 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
555 if (ret < 0)
556 return ret;
557 else if (ret == 0)
558 return 100;
559 else if (ret == 1)
560 return 500;
561 else if (ret == 2)
562 return 800;
563 else if (ret == 3)
564 return 1800;
565 return -EINVAL;
566 }
567
568 /* set weak battery voltage in mV */
bq2415x_set_weak_battery_voltage(struct bq2415x_device * bq,int mV)569 static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
570 {
571 int val;
572
573 /* round to 100mV */
574 if (mV <= 3400 + 50)
575 val = 0;
576 else if (mV <= 3500 + 50)
577 val = 1;
578 else if (mV <= 3600 + 50)
579 val = 2;
580 else
581 val = 3;
582
583 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
584 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
585 }
586
587 /* get weak battery voltage in mV */
bq2415x_get_weak_battery_voltage(struct bq2415x_device * bq)588 static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
589 {
590 int ret;
591
592 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
593 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
594 if (ret < 0)
595 return ret;
596 return 100 * (34 + ret);
597 }
598
599 /* set battery regulation voltage in mV */
bq2415x_set_battery_regulation_voltage(struct bq2415x_device * bq,int mV)600 static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
601 int mV)
602 {
603 int val = (mV/10 - 350) / 2;
604
605 /*
606 * According to datasheet, maximum battery regulation voltage is
607 * 4440mV which is b101111 = 47.
608 */
609 if (val < 0)
610 val = 0;
611 else if (val > 47)
612 return -EINVAL;
613
614 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
615 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
616 }
617
618 /* get battery regulation voltage in mV */
bq2415x_get_battery_regulation_voltage(struct bq2415x_device * bq)619 static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
620 {
621 int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
622 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
623
624 if (ret < 0)
625 return ret;
626 return 10 * (350 + 2*ret);
627 }
628
629 /* set charge current in mA (platform data must provide resistor sense) */
bq2415x_set_charge_current(struct bq2415x_device * bq,int mA)630 static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
631 {
632 int val;
633
634 if (bq->init_data.resistor_sense <= 0)
635 return -EINVAL;
636
637 val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
638 if (val < 0)
639 val = 0;
640 else if (val > 7)
641 val = 7;
642
643 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
644 BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET,
645 BQ2415X_SHIFT_VI_CHRG);
646 }
647
648 /* get charge current in mA (platform data must provide resistor sense) */
bq2415x_get_charge_current(struct bq2415x_device * bq)649 static int bq2415x_get_charge_current(struct bq2415x_device *bq)
650 {
651 int ret;
652
653 if (bq->init_data.resistor_sense <= 0)
654 return -EINVAL;
655
656 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
657 BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
658 if (ret < 0)
659 return ret;
660 return (37400 + 6800*ret) / bq->init_data.resistor_sense;
661 }
662
663 /* set termination current in mA (platform data must provide resistor sense) */
bq2415x_set_termination_current(struct bq2415x_device * bq,int mA)664 static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
665 {
666 int val;
667
668 if (bq->init_data.resistor_sense <= 0)
669 return -EINVAL;
670
671 val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
672 if (val < 0)
673 val = 0;
674 else if (val > 7)
675 val = 7;
676
677 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
678 BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET,
679 BQ2415X_SHIFT_VI_TERM);
680 }
681
682 /* get termination current in mA (platform data must provide resistor sense) */
bq2415x_get_termination_current(struct bq2415x_device * bq)683 static int bq2415x_get_termination_current(struct bq2415x_device *bq)
684 {
685 int ret;
686
687 if (bq->init_data.resistor_sense <= 0)
688 return -EINVAL;
689
690 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
691 BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
692 if (ret < 0)
693 return ret;
694 return (3400 + 3400*ret) / bq->init_data.resistor_sense;
695 }
696
697 /* set default value of property */
698 #define bq2415x_set_default_value(bq, prop) \
699 do { \
700 int ret = 0; \
701 if (bq->init_data.prop != -1) \
702 ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
703 if (ret < 0) \
704 return ret; \
705 } while (0)
706
707 /* set default values of all properties */
bq2415x_set_defaults(struct bq2415x_device * bq)708 static int bq2415x_set_defaults(struct bq2415x_device *bq)
709 {
710 bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
711 bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
712 bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_DISABLE);
713
714 bq2415x_set_default_value(bq, current_limit);
715 bq2415x_set_default_value(bq, weak_battery_voltage);
716 bq2415x_set_default_value(bq, battery_regulation_voltage);
717
718 if (bq->init_data.resistor_sense > 0) {
719 bq2415x_set_default_value(bq, charge_current);
720 bq2415x_set_default_value(bq, termination_current);
721 bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
722 }
723
724 bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
725 return 0;
726 }
727
728 /**** charger mode functions ****/
729
730 /* set charger mode */
bq2415x_set_mode(struct bq2415x_device * bq,enum bq2415x_mode mode)731 static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
732 {
733 int ret = 0;
734 int charger = 0;
735 int boost = 0;
736
737 if (mode == BQ2415X_MODE_BOOST)
738 boost = 1;
739 else if (mode != BQ2415X_MODE_OFF)
740 charger = 1;
741
742 if (!charger)
743 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
744
745 if (!boost)
746 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
747
748 if (ret < 0)
749 return ret;
750
751 switch (mode) {
752 case BQ2415X_MODE_OFF:
753 dev_dbg(bq->dev, "changing mode to: Offline\n");
754 ret = bq2415x_set_current_limit(bq, 100);
755 break;
756 case BQ2415X_MODE_NONE:
757 dev_dbg(bq->dev, "changing mode to: N/A\n");
758 ret = bq2415x_set_current_limit(bq, 100);
759 break;
760 case BQ2415X_MODE_HOST_CHARGER:
761 dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n");
762 ret = bq2415x_set_current_limit(bq, 500);
763 break;
764 case BQ2415X_MODE_DEDICATED_CHARGER:
765 dev_dbg(bq->dev, "changing mode to: Dedicated charger\n");
766 ret = bq2415x_set_current_limit(bq, 1800);
767 break;
768 case BQ2415X_MODE_BOOST: /* Boost mode */
769 dev_dbg(bq->dev, "changing mode to: Boost\n");
770 ret = bq2415x_set_current_limit(bq, 100);
771 break;
772 }
773
774 if (ret < 0)
775 return ret;
776
777 if (charger)
778 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
779 else if (boost)
780 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
781
782 if (ret < 0)
783 return ret;
784
785 bq2415x_set_default_value(bq, weak_battery_voltage);
786 bq2415x_set_default_value(bq, battery_regulation_voltage);
787
788 bq->mode = mode;
789 sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
790
791 return 0;
792
793 }
794
bq2415x_update_reported_mode(struct bq2415x_device * bq,int mA)795 static bool bq2415x_update_reported_mode(struct bq2415x_device *bq, int mA)
796 {
797 enum bq2415x_mode mode;
798
799 if (mA == 0)
800 mode = BQ2415X_MODE_OFF;
801 else if (mA < 500)
802 mode = BQ2415X_MODE_NONE;
803 else if (mA < 1800)
804 mode = BQ2415X_MODE_HOST_CHARGER;
805 else
806 mode = BQ2415X_MODE_DEDICATED_CHARGER;
807
808 if (bq->reported_mode == mode)
809 return false;
810
811 bq->reported_mode = mode;
812 return true;
813 }
814
bq2415x_notifier_call(struct notifier_block * nb,unsigned long val,void * v)815 static int bq2415x_notifier_call(struct notifier_block *nb,
816 unsigned long val, void *v)
817 {
818 struct bq2415x_device *bq =
819 container_of(nb, struct bq2415x_device, nb);
820 struct power_supply *psy = v;
821 union power_supply_propval prop;
822 int ret;
823
824 if (val != PSY_EVENT_PROP_CHANGED)
825 return NOTIFY_OK;
826
827 /* Ignore event if it was not send by notify_node/notify_device */
828 if (bq->notify_node) {
829 if (!psy->dev.parent ||
830 psy->dev.parent->of_node != bq->notify_node)
831 return NOTIFY_OK;
832 } else if (bq->init_data.notify_device) {
833 if (strcmp(psy->desc->name, bq->init_data.notify_device) != 0)
834 return NOTIFY_OK;
835 }
836
837 dev_dbg(bq->dev, "notifier call was called\n");
838
839 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
840 &prop);
841 if (ret != 0)
842 return NOTIFY_OK;
843
844 if (!bq2415x_update_reported_mode(bq, prop.intval))
845 return NOTIFY_OK;
846
847 /* if automode is not enabled do not tell about reported_mode */
848 if (bq->automode < 1)
849 return NOTIFY_OK;
850
851 schedule_delayed_work(&bq->work, 0);
852
853 return NOTIFY_OK;
854 }
855
856 /**** timer functions ****/
857
858 /* enable/disable auto resetting chip timer */
bq2415x_set_autotimer(struct bq2415x_device * bq,int state)859 static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
860 {
861 mutex_lock(&bq2415x_timer_mutex);
862
863 if (bq->autotimer == state) {
864 mutex_unlock(&bq2415x_timer_mutex);
865 return;
866 }
867
868 bq->autotimer = state;
869
870 if (state) {
871 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
872 bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
873 bq->timer_error = NULL;
874 } else {
875 cancel_delayed_work_sync(&bq->work);
876 }
877
878 mutex_unlock(&bq2415x_timer_mutex);
879 }
880
881 /* called by bq2415x_timer_work on timer error */
bq2415x_timer_error(struct bq2415x_device * bq,const char * msg)882 static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
883 {
884 bq->timer_error = msg;
885 sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
886 dev_err(bq->dev, "%s\n", msg);
887 if (bq->automode > 0)
888 bq->automode = 0;
889 bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
890 bq2415x_set_autotimer(bq, 0);
891 }
892
893 /* delayed work function for auto resetting chip timer */
bq2415x_timer_work(struct work_struct * work)894 static void bq2415x_timer_work(struct work_struct *work)
895 {
896 struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
897 work.work);
898 int ret;
899 int error;
900 int boost;
901
902 if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
903 sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
904 bq2415x_set_mode(bq, bq->reported_mode);
905 }
906
907 if (!bq->autotimer)
908 return;
909
910 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
911 if (ret < 0) {
912 bq2415x_timer_error(bq, "Resetting timer failed");
913 return;
914 }
915
916 boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
917 if (boost < 0) {
918 bq2415x_timer_error(bq, "Unknown error");
919 return;
920 }
921
922 error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
923 if (error < 0) {
924 bq2415x_timer_error(bq, "Unknown error");
925 return;
926 }
927
928 if (boost) {
929 switch (error) {
930 /* Non fatal errors, chip is OK */
931 case 0: /* No error */
932 break;
933 case 6: /* Timer expired */
934 dev_err(bq->dev, "Timer expired\n");
935 break;
936 case 3: /* Battery voltage too low */
937 dev_err(bq->dev, "Battery voltage to low\n");
938 break;
939
940 /* Fatal errors, disable and reset chip */
941 case 1: /* Overvoltage protection (chip fried) */
942 bq2415x_timer_error(bq,
943 "Overvoltage protection (chip fried)");
944 return;
945 case 2: /* Overload */
946 bq2415x_timer_error(bq, "Overload");
947 return;
948 case 4: /* Battery overvoltage protection */
949 bq2415x_timer_error(bq,
950 "Battery overvoltage protection");
951 return;
952 case 5: /* Thermal shutdown (too hot) */
953 bq2415x_timer_error(bq,
954 "Thermal shutdown (too hot)");
955 return;
956 case 7: /* N/A */
957 bq2415x_timer_error(bq, "Unknown error");
958 return;
959 }
960 } else {
961 switch (error) {
962 /* Non fatal errors, chip is OK */
963 case 0: /* No error */
964 break;
965 case 2: /* Sleep mode */
966 dev_err(bq->dev, "Sleep mode\n");
967 break;
968 case 3: /* Poor input source */
969 dev_err(bq->dev, "Poor input source\n");
970 break;
971 case 6: /* Timer expired */
972 dev_err(bq->dev, "Timer expired\n");
973 break;
974 case 7: /* No battery */
975 dev_err(bq->dev, "No battery\n");
976 break;
977
978 /* Fatal errors, disable and reset chip */
979 case 1: /* Overvoltage protection (chip fried) */
980 bq2415x_timer_error(bq,
981 "Overvoltage protection (chip fried)");
982 return;
983 case 4: /* Battery overvoltage protection */
984 bq2415x_timer_error(bq,
985 "Battery overvoltage protection");
986 return;
987 case 5: /* Thermal shutdown (too hot) */
988 bq2415x_timer_error(bq,
989 "Thermal shutdown (too hot)");
990 return;
991 }
992 }
993
994 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
995 }
996
997 /**** power supply interface code ****/
998
999 static enum power_supply_property bq2415x_power_supply_props[] = {
1000 /* TODO: maybe add more power supply properties */
1001 POWER_SUPPLY_PROP_STATUS,
1002 POWER_SUPPLY_PROP_MODEL_NAME,
1003 };
1004
bq2415x_power_supply_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)1005 static int bq2415x_power_supply_get_property(struct power_supply *psy,
1006 enum power_supply_property psp,
1007 union power_supply_propval *val)
1008 {
1009 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1010 int ret;
1011
1012 switch (psp) {
1013 case POWER_SUPPLY_PROP_STATUS:
1014 ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
1015 if (ret < 0)
1016 return ret;
1017 else if (ret == 0) /* Ready */
1018 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1019 else if (ret == 1) /* Charge in progress */
1020 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1021 else if (ret == 2) /* Charge done */
1022 val->intval = POWER_SUPPLY_STATUS_FULL;
1023 else
1024 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
1025 break;
1026 case POWER_SUPPLY_PROP_MODEL_NAME:
1027 val->strval = bq->model;
1028 break;
1029 default:
1030 return -EINVAL;
1031 }
1032 return 0;
1033 }
1034
bq2415x_power_supply_init(struct bq2415x_device * bq)1035 static int bq2415x_power_supply_init(struct bq2415x_device *bq)
1036 {
1037 int ret;
1038 int chip;
1039 char revstr[8];
1040 struct power_supply_config psy_cfg = {
1041 .drv_data = bq,
1042 .of_node = bq->dev->of_node,
1043 };
1044
1045 bq->charger_desc.name = bq->name;
1046 bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
1047 bq->charger_desc.properties = bq2415x_power_supply_props;
1048 bq->charger_desc.num_properties =
1049 ARRAY_SIZE(bq2415x_power_supply_props);
1050 bq->charger_desc.get_property = bq2415x_power_supply_get_property;
1051
1052 ret = bq2415x_detect_chip(bq);
1053 if (ret < 0)
1054 chip = BQUNKNOWN;
1055 else
1056 chip = ret;
1057
1058 ret = bq2415x_detect_revision(bq);
1059 if (ret < 0)
1060 strcpy(revstr, "unknown");
1061 else
1062 sprintf(revstr, "1.%d", ret);
1063
1064 bq->model = kasprintf(GFP_KERNEL,
1065 "chip %s, revision %s, vender code %.3d",
1066 bq2415x_chip_name[chip], revstr,
1067 bq2415x_get_vender_code(bq));
1068 if (!bq->model) {
1069 dev_err(bq->dev, "failed to allocate model name\n");
1070 return -ENOMEM;
1071 }
1072
1073 bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
1074 &psy_cfg);
1075 if (IS_ERR(bq->charger)) {
1076 kfree(bq->model);
1077 return PTR_ERR(bq->charger);
1078 }
1079
1080 return 0;
1081 }
1082
bq2415x_power_supply_exit(struct bq2415x_device * bq)1083 static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
1084 {
1085 bq->autotimer = 0;
1086 if (bq->automode > 0)
1087 bq->automode = 0;
1088 cancel_delayed_work_sync(&bq->work);
1089 power_supply_unregister(bq->charger);
1090 kfree(bq->model);
1091 }
1092
1093 /**** additional sysfs entries for power supply interface ****/
1094
1095 /* show *_status entries */
bq2415x_sysfs_show_status(struct device * dev,struct device_attribute * attr,char * buf)1096 static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1097 struct device_attribute *attr,
1098 char *buf)
1099 {
1100 struct power_supply *psy = dev_get_drvdata(dev);
1101 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1102 enum bq2415x_command command;
1103 int ret;
1104
1105 if (strcmp(attr->attr.name, "otg_status") == 0)
1106 command = BQ2415X_OTG_STATUS;
1107 else if (strcmp(attr->attr.name, "charge_status") == 0)
1108 command = BQ2415X_CHARGE_STATUS;
1109 else if (strcmp(attr->attr.name, "boost_status") == 0)
1110 command = BQ2415X_BOOST_STATUS;
1111 else if (strcmp(attr->attr.name, "fault_status") == 0)
1112 command = BQ2415X_FAULT_STATUS;
1113 else
1114 return -EINVAL;
1115
1116 ret = bq2415x_exec_command(bq, command);
1117 if (ret < 0)
1118 return ret;
1119 return sprintf(buf, "%d\n", ret);
1120 }
1121
1122 /*
1123 * set timer entry:
1124 * auto - enable auto mode
1125 * off - disable auto mode
1126 * (other values) - reset chip timer
1127 */
bq2415x_sysfs_set_timer(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1128 static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1129 struct device_attribute *attr,
1130 const char *buf,
1131 size_t count)
1132 {
1133 struct power_supply *psy = dev_get_drvdata(dev);
1134 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1135 int ret = 0;
1136
1137 if (strncmp(buf, "auto", 4) == 0)
1138 bq2415x_set_autotimer(bq, 1);
1139 else if (strncmp(buf, "off", 3) == 0)
1140 bq2415x_set_autotimer(bq, 0);
1141 else
1142 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1143
1144 if (ret < 0)
1145 return ret;
1146 return count;
1147 }
1148
1149 /* show timer entry (auto or off) */
bq2415x_sysfs_show_timer(struct device * dev,struct device_attribute * attr,char * buf)1150 static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1151 struct device_attribute *attr,
1152 char *buf)
1153 {
1154 struct power_supply *psy = dev_get_drvdata(dev);
1155 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1156
1157 if (bq->timer_error)
1158 return sprintf(buf, "%s\n", bq->timer_error);
1159
1160 if (bq->autotimer)
1161 return sprintf(buf, "auto\n");
1162 return sprintf(buf, "off\n");
1163 }
1164
1165 /*
1166 * set mode entry:
1167 * auto - if automode is supported, enable it and set mode to reported
1168 * none - disable charger and boost mode
1169 * host - charging mode for host/hub chargers (current limit 500mA)
1170 * dedicated - charging mode for dedicated chargers (unlimited current limit)
1171 * boost - disable charger and enable boost mode
1172 */
bq2415x_sysfs_set_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1173 static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1174 struct device_attribute *attr,
1175 const char *buf,
1176 size_t count)
1177 {
1178 struct power_supply *psy = dev_get_drvdata(dev);
1179 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1180 enum bq2415x_mode mode;
1181 int ret = 0;
1182
1183 if (strncmp(buf, "auto", 4) == 0) {
1184 if (bq->automode < 0)
1185 return -EINVAL;
1186 bq->automode = 1;
1187 mode = bq->reported_mode;
1188 } else if (strncmp(buf, "off", 3) == 0) {
1189 if (bq->automode > 0)
1190 bq->automode = 0;
1191 mode = BQ2415X_MODE_OFF;
1192 } else if (strncmp(buf, "none", 4) == 0) {
1193 if (bq->automode > 0)
1194 bq->automode = 0;
1195 mode = BQ2415X_MODE_NONE;
1196 } else if (strncmp(buf, "host", 4) == 0) {
1197 if (bq->automode > 0)
1198 bq->automode = 0;
1199 mode = BQ2415X_MODE_HOST_CHARGER;
1200 } else if (strncmp(buf, "dedicated", 9) == 0) {
1201 if (bq->automode > 0)
1202 bq->automode = 0;
1203 mode = BQ2415X_MODE_DEDICATED_CHARGER;
1204 } else if (strncmp(buf, "boost", 5) == 0) {
1205 if (bq->automode > 0)
1206 bq->automode = 0;
1207 mode = BQ2415X_MODE_BOOST;
1208 } else if (strncmp(buf, "reset", 5) == 0) {
1209 bq2415x_reset_chip(bq);
1210 bq2415x_set_defaults(bq);
1211 if (bq->automode <= 0)
1212 return count;
1213 bq->automode = 1;
1214 mode = bq->reported_mode;
1215 } else {
1216 return -EINVAL;
1217 }
1218
1219 ret = bq2415x_set_mode(bq, mode);
1220 if (ret < 0)
1221 return ret;
1222 return count;
1223 }
1224
1225 /* show mode entry (auto, none, host, dedicated or boost) */
bq2415x_sysfs_show_mode(struct device * dev,struct device_attribute * attr,char * buf)1226 static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1227 struct device_attribute *attr,
1228 char *buf)
1229 {
1230 struct power_supply *psy = dev_get_drvdata(dev);
1231 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1232 ssize_t ret = 0;
1233
1234 if (bq->automode > 0)
1235 ret += sprintf(buf+ret, "auto (");
1236
1237 switch (bq->mode) {
1238 case BQ2415X_MODE_OFF:
1239 ret += sprintf(buf+ret, "off");
1240 break;
1241 case BQ2415X_MODE_NONE:
1242 ret += sprintf(buf+ret, "none");
1243 break;
1244 case BQ2415X_MODE_HOST_CHARGER:
1245 ret += sprintf(buf+ret, "host");
1246 break;
1247 case BQ2415X_MODE_DEDICATED_CHARGER:
1248 ret += sprintf(buf+ret, "dedicated");
1249 break;
1250 case BQ2415X_MODE_BOOST:
1251 ret += sprintf(buf+ret, "boost");
1252 break;
1253 }
1254
1255 if (bq->automode > 0)
1256 ret += sprintf(buf+ret, ")");
1257
1258 ret += sprintf(buf+ret, "\n");
1259 return ret;
1260 }
1261
1262 /* show reported_mode entry (none, host, dedicated or boost) */
bq2415x_sysfs_show_reported_mode(struct device * dev,struct device_attribute * attr,char * buf)1263 static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
1264 struct device_attribute *attr,
1265 char *buf)
1266 {
1267 struct power_supply *psy = dev_get_drvdata(dev);
1268 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1269
1270 if (bq->automode < 0)
1271 return -EINVAL;
1272
1273 switch (bq->reported_mode) {
1274 case BQ2415X_MODE_OFF:
1275 return sprintf(buf, "off\n");
1276 case BQ2415X_MODE_NONE:
1277 return sprintf(buf, "none\n");
1278 case BQ2415X_MODE_HOST_CHARGER:
1279 return sprintf(buf, "host\n");
1280 case BQ2415X_MODE_DEDICATED_CHARGER:
1281 return sprintf(buf, "dedicated\n");
1282 case BQ2415X_MODE_BOOST:
1283 return sprintf(buf, "boost\n");
1284 }
1285
1286 return -EINVAL;
1287 }
1288
1289 /* directly set raw value to chip register, format: 'register value' */
bq2415x_sysfs_set_registers(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1290 static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1291 struct device_attribute *attr,
1292 const char *buf,
1293 size_t count)
1294 {
1295 struct power_supply *psy = dev_get_drvdata(dev);
1296 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1297 ssize_t ret = 0;
1298 unsigned int reg;
1299 unsigned int val;
1300
1301 if (sscanf(buf, "%x %x", ®, &val) != 2)
1302 return -EINVAL;
1303
1304 if (reg > 4 || val > 255)
1305 return -EINVAL;
1306
1307 ret = bq2415x_i2c_write(bq, reg, val);
1308 if (ret < 0)
1309 return ret;
1310 return count;
1311 }
1312
1313 /* print value of chip register, format: 'register=value' */
bq2415x_sysfs_print_reg(struct bq2415x_device * bq,u8 reg,char * buf)1314 static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1315 u8 reg,
1316 char *buf)
1317 {
1318 int ret = bq2415x_i2c_read(bq, reg);
1319
1320 if (ret < 0)
1321 return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1322 return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1323 }
1324
1325 /* show all raw values of chip register, format per line: 'register=value' */
bq2415x_sysfs_show_registers(struct device * dev,struct device_attribute * attr,char * buf)1326 static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1327 struct device_attribute *attr,
1328 char *buf)
1329 {
1330 struct power_supply *psy = dev_get_drvdata(dev);
1331 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1332 ssize_t ret = 0;
1333
1334 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1335 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1336 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1337 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1338 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1339 return ret;
1340 }
1341
1342 /* set current and voltage limit entries (in mA or mV) */
bq2415x_sysfs_set_limit(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1343 static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1344 struct device_attribute *attr,
1345 const char *buf,
1346 size_t count)
1347 {
1348 struct power_supply *psy = dev_get_drvdata(dev);
1349 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1350 long val;
1351 int ret;
1352
1353 if (kstrtol(buf, 10, &val) < 0)
1354 return -EINVAL;
1355
1356 if (strcmp(attr->attr.name, "current_limit") == 0)
1357 ret = bq2415x_set_current_limit(bq, val);
1358 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1359 ret = bq2415x_set_weak_battery_voltage(bq, val);
1360 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1361 ret = bq2415x_set_battery_regulation_voltage(bq, val);
1362 else if (strcmp(attr->attr.name, "charge_current") == 0)
1363 ret = bq2415x_set_charge_current(bq, val);
1364 else if (strcmp(attr->attr.name, "termination_current") == 0)
1365 ret = bq2415x_set_termination_current(bq, val);
1366 else
1367 return -EINVAL;
1368
1369 if (ret < 0)
1370 return ret;
1371 return count;
1372 }
1373
1374 /* show current and voltage limit entries (in mA or mV) */
bq2415x_sysfs_show_limit(struct device * dev,struct device_attribute * attr,char * buf)1375 static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1376 struct device_attribute *attr,
1377 char *buf)
1378 {
1379 struct power_supply *psy = dev_get_drvdata(dev);
1380 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1381 int ret;
1382
1383 if (strcmp(attr->attr.name, "current_limit") == 0)
1384 ret = bq2415x_get_current_limit(bq);
1385 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1386 ret = bq2415x_get_weak_battery_voltage(bq);
1387 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1388 ret = bq2415x_get_battery_regulation_voltage(bq);
1389 else if (strcmp(attr->attr.name, "charge_current") == 0)
1390 ret = bq2415x_get_charge_current(bq);
1391 else if (strcmp(attr->attr.name, "termination_current") == 0)
1392 ret = bq2415x_get_termination_current(bq);
1393 else
1394 return -EINVAL;
1395
1396 if (ret < 0)
1397 return ret;
1398 return sprintf(buf, "%d\n", ret);
1399 }
1400
1401 /* set *_enable entries */
bq2415x_sysfs_set_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1402 static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1403 struct device_attribute *attr,
1404 const char *buf,
1405 size_t count)
1406 {
1407 struct power_supply *psy = dev_get_drvdata(dev);
1408 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1409 enum bq2415x_command command;
1410 long val;
1411 int ret;
1412
1413 if (kstrtol(buf, 10, &val) < 0)
1414 return -EINVAL;
1415
1416 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1417 command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1418 BQ2415X_CHARGE_TERMINATION_DISABLE;
1419 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1420 command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1421 BQ2415X_HIGH_IMPEDANCE_DISABLE;
1422 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1423 command = val ? BQ2415X_OTG_PIN_ENABLE :
1424 BQ2415X_OTG_PIN_DISABLE;
1425 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1426 command = val ? BQ2415X_STAT_PIN_ENABLE :
1427 BQ2415X_STAT_PIN_DISABLE;
1428 else
1429 return -EINVAL;
1430
1431 ret = bq2415x_exec_command(bq, command);
1432 if (ret < 0)
1433 return ret;
1434 return count;
1435 }
1436
1437 /* show *_enable entries */
bq2415x_sysfs_show_enable(struct device * dev,struct device_attribute * attr,char * buf)1438 static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1439 struct device_attribute *attr,
1440 char *buf)
1441 {
1442 struct power_supply *psy = dev_get_drvdata(dev);
1443 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1444 enum bq2415x_command command;
1445 int ret;
1446
1447 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1448 command = BQ2415X_CHARGE_TERMINATION_STATUS;
1449 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1450 command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1451 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1452 command = BQ2415X_OTG_PIN_STATUS;
1453 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1454 command = BQ2415X_STAT_PIN_STATUS;
1455 else
1456 return -EINVAL;
1457
1458 ret = bq2415x_exec_command(bq, command);
1459 if (ret < 0)
1460 return ret;
1461 return sprintf(buf, "%d\n", ret);
1462 }
1463
1464 static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1465 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1466 static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1467 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1468 static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1469 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1470 static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1471 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1472 static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1473 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1474
1475 static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1476 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1477 static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1478 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1479 static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1480 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1481 static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1482 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1483
1484 static DEVICE_ATTR(reported_mode, S_IRUGO,
1485 bq2415x_sysfs_show_reported_mode, NULL);
1486 static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1487 bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1488 static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1489 bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1490
1491 static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1492 bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1493
1494 static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1495 static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1496 static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1497 static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1498
1499 static struct attribute *bq2415x_sysfs_attributes[] = {
1500 /*
1501 * TODO: some (appropriate) of these attrs should be switched to
1502 * use power supply class props.
1503 */
1504 &dev_attr_current_limit.attr,
1505 &dev_attr_weak_battery_voltage.attr,
1506 &dev_attr_battery_regulation_voltage.attr,
1507 &dev_attr_charge_current.attr,
1508 &dev_attr_termination_current.attr,
1509
1510 &dev_attr_charge_termination_enable.attr,
1511 &dev_attr_high_impedance_enable.attr,
1512 &dev_attr_otg_pin_enable.attr,
1513 &dev_attr_stat_pin_enable.attr,
1514
1515 &dev_attr_reported_mode.attr,
1516 &dev_attr_mode.attr,
1517 &dev_attr_timer.attr,
1518
1519 &dev_attr_registers.attr,
1520
1521 &dev_attr_otg_status.attr,
1522 &dev_attr_charge_status.attr,
1523 &dev_attr_boost_status.attr,
1524 &dev_attr_fault_status.attr,
1525 NULL,
1526 };
1527
1528 static const struct attribute_group bq2415x_sysfs_attr_group = {
1529 .attrs = bq2415x_sysfs_attributes,
1530 };
1531
bq2415x_sysfs_init(struct bq2415x_device * bq)1532 static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1533 {
1534 return sysfs_create_group(&bq->charger->dev.kobj,
1535 &bq2415x_sysfs_attr_group);
1536 }
1537
bq2415x_sysfs_exit(struct bq2415x_device * bq)1538 static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1539 {
1540 sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
1541 }
1542
1543 /* main bq2415x probe function */
bq2415x_probe(struct i2c_client * client,const struct i2c_device_id * id)1544 static int bq2415x_probe(struct i2c_client *client,
1545 const struct i2c_device_id *id)
1546 {
1547 int ret;
1548 int num;
1549 char *name = NULL;
1550 struct bq2415x_device *bq;
1551 struct device_node *np = client->dev.of_node;
1552 struct bq2415x_platform_data *pdata = client->dev.platform_data;
1553 const struct acpi_device_id *acpi_id = NULL;
1554 struct power_supply *notify_psy = NULL;
1555 union power_supply_propval prop;
1556
1557 if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
1558 dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
1559 return -ENODEV;
1560 }
1561
1562 /* Get new ID for the new device */
1563 mutex_lock(&bq2415x_id_mutex);
1564 num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
1565 mutex_unlock(&bq2415x_id_mutex);
1566 if (num < 0)
1567 return num;
1568
1569 if (id) {
1570 name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1571 } else if (ACPI_HANDLE(&client->dev)) {
1572 acpi_id =
1573 acpi_match_device(client->dev.driver->acpi_match_table,
1574 &client->dev);
1575 if (!acpi_id) {
1576 dev_err(&client->dev, "failed to match device name\n");
1577 ret = -ENODEV;
1578 goto error_1;
1579 }
1580 name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
1581 }
1582 if (!name) {
1583 dev_err(&client->dev, "failed to allocate device name\n");
1584 ret = -ENOMEM;
1585 goto error_1;
1586 }
1587
1588 bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
1589 if (!bq) {
1590 ret = -ENOMEM;
1591 goto error_2;
1592 }
1593
1594 i2c_set_clientdata(client, bq);
1595
1596 bq->id = num;
1597 bq->dev = &client->dev;
1598 if (id)
1599 bq->chip = id->driver_data;
1600 else if (ACPI_HANDLE(bq->dev))
1601 bq->chip = acpi_id->driver_data;
1602 bq->name = name;
1603 bq->mode = BQ2415X_MODE_OFF;
1604 bq->reported_mode = BQ2415X_MODE_OFF;
1605 bq->autotimer = 0;
1606 bq->automode = 0;
1607
1608 if (np || ACPI_HANDLE(bq->dev)) {
1609 ret = device_property_read_u32(bq->dev,
1610 "ti,current-limit",
1611 &bq->init_data.current_limit);
1612 if (ret)
1613 goto error_2;
1614 ret = device_property_read_u32(bq->dev,
1615 "ti,weak-battery-voltage",
1616 &bq->init_data.weak_battery_voltage);
1617 if (ret)
1618 goto error_2;
1619 ret = device_property_read_u32(bq->dev,
1620 "ti,battery-regulation-voltage",
1621 &bq->init_data.battery_regulation_voltage);
1622 if (ret)
1623 goto error_2;
1624 ret = device_property_read_u32(bq->dev,
1625 "ti,charge-current",
1626 &bq->init_data.charge_current);
1627 if (ret)
1628 goto error_2;
1629 ret = device_property_read_u32(bq->dev,
1630 "ti,termination-current",
1631 &bq->init_data.termination_current);
1632 if (ret)
1633 goto error_2;
1634 ret = device_property_read_u32(bq->dev,
1635 "ti,resistor-sense",
1636 &bq->init_data.resistor_sense);
1637 if (ret)
1638 goto error_2;
1639 if (np)
1640 bq->notify_node = of_parse_phandle(np,
1641 "ti,usb-charger-detection", 0);
1642 } else {
1643 memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
1644 }
1645
1646 bq2415x_reset_chip(bq);
1647
1648 ret = bq2415x_power_supply_init(bq);
1649 if (ret) {
1650 dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1651 goto error_2;
1652 }
1653
1654 ret = bq2415x_sysfs_init(bq);
1655 if (ret) {
1656 dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1657 goto error_3;
1658 }
1659
1660 ret = bq2415x_set_defaults(bq);
1661 if (ret) {
1662 dev_err(bq->dev, "failed to set default values: %d\n", ret);
1663 goto error_4;
1664 }
1665
1666 if (bq->notify_node || bq->init_data.notify_device) {
1667 bq->nb.notifier_call = bq2415x_notifier_call;
1668 ret = power_supply_reg_notifier(&bq->nb);
1669 if (ret) {
1670 dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
1671 goto error_4;
1672 }
1673
1674 bq->automode = 1;
1675 dev_info(bq->dev, "automode supported, waiting for events\n");
1676 } else {
1677 bq->automode = -1;
1678 dev_info(bq->dev, "automode not supported\n");
1679 }
1680
1681 /* Query for initial reported_mode and set it */
1682 if (bq->nb.notifier_call) {
1683 if (np) {
1684 notify_psy = power_supply_get_by_phandle(np,
1685 "ti,usb-charger-detection");
1686 if (IS_ERR(notify_psy))
1687 notify_psy = NULL;
1688 } else if (bq->init_data.notify_device) {
1689 notify_psy = power_supply_get_by_name(
1690 bq->init_data.notify_device);
1691 }
1692 }
1693 if (notify_psy) {
1694 ret = power_supply_get_property(notify_psy,
1695 POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
1696 power_supply_put(notify_psy);
1697
1698 if (ret == 0) {
1699 bq2415x_update_reported_mode(bq, prop.intval);
1700 bq2415x_set_mode(bq, bq->reported_mode);
1701 }
1702 }
1703
1704 INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1705 bq2415x_set_autotimer(bq, 1);
1706
1707 dev_info(bq->dev, "driver registered\n");
1708 return 0;
1709
1710 error_4:
1711 bq2415x_sysfs_exit(bq);
1712 error_3:
1713 bq2415x_power_supply_exit(bq);
1714 error_2:
1715 if (bq)
1716 of_node_put(bq->notify_node);
1717 kfree(name);
1718 error_1:
1719 mutex_lock(&bq2415x_id_mutex);
1720 idr_remove(&bq2415x_id, num);
1721 mutex_unlock(&bq2415x_id_mutex);
1722
1723 return ret;
1724 }
1725
1726 /* main bq2415x remove function */
1727
bq2415x_remove(struct i2c_client * client)1728 static int bq2415x_remove(struct i2c_client *client)
1729 {
1730 struct bq2415x_device *bq = i2c_get_clientdata(client);
1731
1732 if (bq->nb.notifier_call)
1733 power_supply_unreg_notifier(&bq->nb);
1734
1735 of_node_put(bq->notify_node);
1736 bq2415x_sysfs_exit(bq);
1737 bq2415x_power_supply_exit(bq);
1738
1739 bq2415x_reset_chip(bq);
1740
1741 mutex_lock(&bq2415x_id_mutex);
1742 idr_remove(&bq2415x_id, bq->id);
1743 mutex_unlock(&bq2415x_id_mutex);
1744
1745 dev_info(bq->dev, "driver unregistered\n");
1746
1747 kfree(bq->name);
1748
1749 return 0;
1750 }
1751
1752 static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1753 { "bq2415x", BQUNKNOWN },
1754 { "bq24150", BQ24150 },
1755 { "bq24150a", BQ24150A },
1756 { "bq24151", BQ24151 },
1757 { "bq24151a", BQ24151A },
1758 { "bq24152", BQ24152 },
1759 { "bq24153", BQ24153 },
1760 { "bq24153a", BQ24153A },
1761 { "bq24155", BQ24155 },
1762 { "bq24156", BQ24156 },
1763 { "bq24156a", BQ24156A },
1764 { "bq24157s", BQ24157S },
1765 { "bq24158", BQ24158 },
1766 {},
1767 };
1768 MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1769
1770 #ifdef CONFIG_ACPI
1771 static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
1772 { "BQ2415X", BQUNKNOWN },
1773 { "BQ241500", BQ24150 },
1774 { "BQA24150", BQ24150A },
1775 { "BQ241510", BQ24151 },
1776 { "BQA24151", BQ24151A },
1777 { "BQ241520", BQ24152 },
1778 { "BQ241530", BQ24153 },
1779 { "BQA24153", BQ24153A },
1780 { "BQ241550", BQ24155 },
1781 { "BQ241560", BQ24156 },
1782 { "BQA24156", BQ24156A },
1783 { "BQS24157", BQ24157S },
1784 { "BQ241580", BQ24158 },
1785 {},
1786 };
1787 MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
1788 #endif
1789
1790 #ifdef CONFIG_OF
1791 static const struct of_device_id bq2415x_of_match_table[] = {
1792 { .compatible = "ti,bq24150" },
1793 { .compatible = "ti,bq24150a" },
1794 { .compatible = "ti,bq24151" },
1795 { .compatible = "ti,bq24151a" },
1796 { .compatible = "ti,bq24152" },
1797 { .compatible = "ti,bq24153" },
1798 { .compatible = "ti,bq24153a" },
1799 { .compatible = "ti,bq24155" },
1800 { .compatible = "ti,bq24156" },
1801 { .compatible = "ti,bq24156a" },
1802 { .compatible = "ti,bq24157s" },
1803 { .compatible = "ti,bq24158" },
1804 {},
1805 };
1806 MODULE_DEVICE_TABLE(of, bq2415x_of_match_table);
1807 #endif
1808
1809 static struct i2c_driver bq2415x_driver = {
1810 .driver = {
1811 .name = "bq2415x-charger",
1812 .of_match_table = of_match_ptr(bq2415x_of_match_table),
1813 .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
1814 },
1815 .probe = bq2415x_probe,
1816 .remove = bq2415x_remove,
1817 .id_table = bq2415x_i2c_id_table,
1818 };
1819 module_i2c_driver(bq2415x_driver);
1820
1821 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1822 MODULE_DESCRIPTION("bq2415x charger driver");
1823 MODULE_LICENSE("GPL");
1824
