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clk: twl6040: Remove clk.h include
[deliverable/linux.git] / drivers / power / bq2415x_charger.c
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0bc98cc6 1/*
6c47a3e0
AV		 2 * bq2415x charger driver
3 *
32260308 4 * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com>
6c47a3e0
AV		 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 *
6c47a3e0
AV		 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
0e1392d9
AMN		 23 * http://www.ti.com/product/bq24157s
24 * http://www.ti.com/product/bq24158
6c47a3e0 25 */
0bc98cc6 26
0bc98cc6
PR		 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>
b01e7c3b 38#include <linux/acpi.h>
0bc98cc6
PR		 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
100enum 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
135enum bq2415x_chip {
136 BQUNKNOWN,
137 BQ24150,
138 BQ24150A,
139 BQ24151,
140 BQ24151A,
141 BQ24152,
142 BQ24153,
143 BQ24153A,
144 BQ24155,
145 BQ24156,
146 BQ24156A,
0e1392d9 147 BQ24157S,
0bc98cc6
PR		 148 BQ24158,
149};
150
151static 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",
0e1392d9 163 "bq24157s",
0bc98cc6
PR		 164 "bq24158",
165};
166
167struct bq2415x_device {
168 struct device *dev;
169 struct bq2415x_platform_data init_data;
297d716f
KK		 170 struct power_supply *charger;
171 struct power_supply_desc charger_desc;
0bc98cc6 172 struct delayed_work work;
faffd234 173 struct power_supply *notify_psy;
32260308 174 struct notifier_block nb;
0bc98cc6 175 enum bq2415x_mode reported_mode;/* mode reported by hook function */
881f985a 176 enum bq2415x_mode mode; /* currently configured mode */
0bc98cc6
PR		 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 */
187static DEFINE_IDR(bq2415x_id);
188
189static DEFINE_MUTEX(bq2415x_id_mutex);
190static DEFINE_MUTEX(bq2415x_timer_mutex);
191static DEFINE_MUTEX(bq2415x_i2c_mutex);
192
193/**** i2c read functions ****/
194
195/* read value from register */
196static 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 = &reg;
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 */
226static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
6c47a3e0 227 u8 mask, u8 shift)
0bc98cc6
PR		 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;
6c47a3e0 237 return (ret & mask) >> shift;
0bc98cc6
PR		 238}
239
240/* read value from register and return one specified bit */
241static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
242{
243 if (bit > 8)
244 return -EINVAL;
6c47a3e0 245 return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
0bc98cc6
PR		 246}
247
248/**** i2c write functions ****/
249
250/* write value to register */
251static 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 */
280static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
6c47a3e0 281 u8 mask, u8 shift)
0bc98cc6
PR		 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 */
299static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
6c47a3e0 300 bool val, u8 bit)
0bc98cc6
PR		 301{
302 if (bit > 8)
303 return -EINVAL;
6c47a3e0 304 return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
0bc98cc6
PR		 305}
306
307/**** global functions ****/
308
309/* exec command function */
310static int bq2415x_exec_command(struct bq2415x_device *bq,
311 enum bq2415x_command command)
312{
313 int ret;
6c47a3e0 314
0bc98cc6
PR		 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;
42d0631b 355 return ret > 0 ? 0 : 1;
0bc98cc6
PR		 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);
0bc98cc6 409 }
6c47a3e0 410 return -EINVAL;
0bc98cc6
PR		 411}
412
413/* detect chip type */
414static 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;
42d0631b 428 return BQ24151;
0bc98cc6
PR		 429 case 1:
430 if (bq->chip == BQ24150A ||
431 bq->chip == BQ24152 ||
432 bq->chip == BQ24155)
433 return bq->chip;
42d0631b 434 return BQ24150;
0bc98cc6
PR		 435 case 2:
436 if (bq->chip == BQ24153A)
437 return bq->chip;
42d0631b 438 return BQ24153;
0bc98cc6
PR		 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;
42d0631b 449 return BQ24156;
0bc98cc6 450 case 2:
0e1392d9
AMN		 451 if (bq->chip == BQ24157S)
452 return bq->chip;
0bc98cc6
PR		 453 return BQ24158;
454 default:
455 return BQUNKNOWN;
456 }
457 break;
458 }
459
460 return BQUNKNOWN;
461}
462
463/* detect chip revision */
464static 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);
6c47a3e0 468
0bc98cc6
PR		 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;
42d0631b 480 return -1;
0bc98cc6
PR		 481 case BQ24153:
482 case BQ24153A:
483 case BQ24156:
484 case BQ24156A:
0e1392d9 485 case BQ24157S:
0bc98cc6
PR		 486 case BQ24158:
487 if (ret == 3)
488 return 0;
489 else if (ret == 1)
490 return 1;
42d0631b 491 return -1;
0bc98cc6
PR		 492 case BQ24155:
493 if (ret == 3)
494 return 3;
42d0631b 495 return -1;
0bc98cc6
PR		 496 case BQUNKNOWN:
497 return -1;
498 }
499
500 return -1;
501}
502
503/* return chip vender code */
504static int bq2415x_get_vender_code(struct bq2415x_device *bq)
505{
6c47a3e0
AV		 506 int ret;
507
508 ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
0bc98cc6
PR		 509 if (ret < 0)
510 return 0;
6c47a3e0
AV		 511
512 /* convert to binary */
513 return (ret & 0x1) +
514 ((ret >> 1) & 0x1) * 10 +
515 ((ret >> 2) & 0x1) * 100;
0bc98cc6
PR		 516}
517
518/* reset all chip registers to default state */
519static 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 */
531static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
532{
533 int val;
6c47a3e0 534
0bc98cc6
PR		 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;
6c47a3e0 543
0bc98cc6
PR		 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 */
549static int bq2415x_get_current_limit(struct bq2415x_device *bq)
550{
6c47a3e0
AV		 551 int ret;
552
553 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
0bc98cc6
PR		 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;
6c47a3e0 565 return -EINVAL;
0bc98cc6
PR		 566}
567
568/* set weak battery voltage in mV */
569static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
570{
0bc98cc6 571 int val;
6c47a3e0
AV		 572
573 /* round to 100mV */
0bc98cc6
PR		 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;
6c47a3e0 582
0bc98cc6
PR		 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 */
588static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
589{
6c47a3e0
AV		 590 int ret;
591
592 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
0bc98cc6
PR		 593 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
594 if (ret < 0)
595 return ret;
6c47a3e0 596 return 100 * (34 + ret);
0bc98cc6
PR		 597}
598
599/* set battery regulation voltage in mV */
600static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
6c47a3e0 601 int mV)
0bc98cc6
PR		 602{
603 int val = (mV/10 - 350) / 2;
604
3ed5cd79
AB		 605 /*
606 * According to datasheet, maximum battery regulation voltage is
607 * 4440mV which is b101111 = 47.
608 */
0bc98cc6
PR		 609 if (val < 0)
610 val = 0;
3ed5cd79 611 else if (val > 47)
0bc98cc6
PR		 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 */
619static 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);
6c47a3e0 623
0bc98cc6
PR		 624 if (ret < 0)
625 return ret;
6c47a3e0 626 return 10 * (350 + 2*ret);
0bc98cc6
PR		 627}
628
629/* set charge current in mA (platform data must provide resistor sense) */
630static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
631{
632 int val;
6c47a3e0 633
0bc98cc6 634 if (bq->init_data.resistor_sense <= 0)
f6d8b774 635 return -EINVAL;
0bc98cc6
PR		 636
637 val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
0bc98cc6
PR		 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) */
649static int bq2415x_get_charge_current(struct bq2415x_device *bq)
650{
651 int ret;
6c47a3e0 652
0bc98cc6 653 if (bq->init_data.resistor_sense <= 0)
f6d8b774 654 return -EINVAL;
0bc98cc6
PR		 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;
6c47a3e0 660 return (37400 + 6800*ret) / bq->init_data.resistor_sense;
0bc98cc6
PR		 661}
662
663/* set termination current in mA (platform data must provide resistor sense) */
664static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
665{
666 int val;
6c47a3e0 667
0bc98cc6 668 if (bq->init_data.resistor_sense <= 0)
f6d8b774 669 return -EINVAL;
0bc98cc6
PR		 670
671 val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
0bc98cc6
PR		 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) */
683static int bq2415x_get_termination_current(struct bq2415x_device *bq)
684{
685 int ret;
6c47a3e0 686
0bc98cc6 687 if (bq->init_data.resistor_sense <= 0)
f6d8b774 688 return -EINVAL;
0bc98cc6
PR		 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;
6c47a3e0 694 return (3400 + 3400*ret) / bq->init_data.resistor_sense;
0bc98cc6
PR		 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 */
708static 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);
6c47a3e0 713
0bc98cc6
PR		 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);
6c47a3e0 717
0bc98cc6
PR		 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 }
6c47a3e0 723
0bc98cc6
PR		 724 bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
725 return 0;
726}
727
728/**** charger mode functions ****/
729
730/* set charger mode */
731static 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
0bc98cc6
PR		 737 if (mode == BQ2415X_MODE_BOOST)
738 boost = 1;
ac6324e7
PR		 739 else if (mode != BQ2415X_MODE_OFF)
740 charger = 1;
0bc98cc6
PR		 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) {
ac6324e7
PR		 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;
0bc98cc6
PR		 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;
297d716f 789 sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
0bc98cc6
PR		 790
791 return 0;
792
793}
794
32260308
PR		 795static int bq2415x_notifier_call(struct notifier_block *nb,
796 unsigned long val, void *v)
0bc98cc6 797{
32260308
PR		 798 struct bq2415x_device *bq =
799 container_of(nb, struct bq2415x_device, nb);
800 struct power_supply *psy = v;
801 enum bq2415x_mode mode;
802 union power_supply_propval prop;
803 int ret;
804 int mA;
0bc98cc6 805
32260308
PR		 806 if (val != PSY_EVENT_PROP_CHANGED)
807 return NOTIFY_OK;
808
faffd234 809 if (psy != bq->notify_psy)
32260308
PR		 810 return NOTIFY_OK;
811
812 dev_dbg(bq->dev, "notifier call was called\n");
813
d7bdffb9
KK		 814 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
815 &prop);
32260308
PR		 816 if (ret != 0)
817 return NOTIFY_OK;
818
819 mA = prop.intval;
820
821 if (mA == 0)
822 mode = BQ2415X_MODE_OFF;
823 else if (mA < 500)
824 mode = BQ2415X_MODE_NONE;
825 else if (mA < 1800)
826 mode = BQ2415X_MODE_HOST_CHARGER;
827 else
828 mode = BQ2415X_MODE_DEDICATED_CHARGER;
829
830 if (bq->reported_mode == mode)
831 return NOTIFY_OK;
0bc98cc6 832
0bc98cc6
PR		 833 bq->reported_mode = mode;
834
835 /* if automode is not enabled do not tell about reported_mode */
836 if (bq->automode < 1)
32260308 837 return NOTIFY_OK;
0bc98cc6 838
3c018504 839 schedule_delayed_work(&bq->work, 0);
0bc98cc6 840
32260308 841 return NOTIFY_OK;
0bc98cc6
PR		 842}
843
844/**** timer functions ****/
845
846/* enable/disable auto resetting chip timer */
847static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
848{
849 mutex_lock(&bq2415x_timer_mutex);
850
851 if (bq->autotimer == state) {
852 mutex_unlock(&bq2415x_timer_mutex);
853 return;
854 }
855
856 bq->autotimer = state;
857
858 if (state) {
859 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
860 bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
861 bq->timer_error = NULL;
862 } else {
863 cancel_delayed_work_sync(&bq->work);
864 }
865
866 mutex_unlock(&bq2415x_timer_mutex);
867}
868
869/* called by bq2415x_timer_work on timer error */
870static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
871{
872 bq->timer_error = msg;
297d716f 873 sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
0bc98cc6
PR		 874 dev_err(bq->dev, "%s\n", msg);
875 if (bq->automode > 0)
876 bq->automode = 0;
ac6324e7 877 bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
0bc98cc6
PR		 878 bq2415x_set_autotimer(bq, 0);
879}
880
881/* delayed work function for auto resetting chip timer */
882static void bq2415x_timer_work(struct work_struct *work)
883{
884 struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
6c47a3e0
AV		 885 work.work);
886 int ret;
887 int error;
888 int boost;
0bc98cc6 889
3c018504 890 if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
297d716f 891 sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
3c018504
SR		 892 bq2415x_set_mode(bq, bq->reported_mode);
893 }
894
0bc98cc6
PR		 895 if (!bq->autotimer)
896 return;
897
898 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
899 if (ret < 0) {
900 bq2415x_timer_error(bq, "Resetting timer failed");
901 return;
902 }
903
904 boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
905 if (boost < 0) {
906 bq2415x_timer_error(bq, "Unknown error");
907 return;
908 }
909
910 error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
911 if (error < 0) {
912 bq2415x_timer_error(bq, "Unknown error");
913 return;
914 }
915
916 if (boost) {
917 switch (error) {
918 /* Non fatal errors, chip is OK */
919 case 0: /* No error */
920 break;
921 case 6: /* Timer expired */
922 dev_err(bq->dev, "Timer expired\n");
923 break;
924 case 3: /* Battery voltage too low */
925 dev_err(bq->dev, "Battery voltage to low\n");
926 break;
927
928 /* Fatal errors, disable and reset chip */
929 case 1: /* Overvoltage protection (chip fried) */
930 bq2415x_timer_error(bq,
931 "Overvoltage protection (chip fried)");
932 return;
933 case 2: /* Overload */
934 bq2415x_timer_error(bq, "Overload");
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 case 7: /* N/A */
945 bq2415x_timer_error(bq, "Unknown error");
946 return;
947 }
948 } else {
949 switch (error) {
950 /* Non fatal errors, chip is OK */
951 case 0: /* No error */
952 break;
953 case 2: /* Sleep mode */
954 dev_err(bq->dev, "Sleep mode\n");
955 break;
956 case 3: /* Poor input source */
957 dev_err(bq->dev, "Poor input source\n");
958 break;
959 case 6: /* Timer expired */
960 dev_err(bq->dev, "Timer expired\n");
961 break;
962 case 7: /* No battery */
963 dev_err(bq->dev, "No battery\n");
964 break;
965
966 /* Fatal errors, disable and reset chip */
967 case 1: /* Overvoltage protection (chip fried) */
968 bq2415x_timer_error(bq,
969 "Overvoltage protection (chip fried)");
970 return;
971 case 4: /* Battery overvoltage protection */
972 bq2415x_timer_error(bq,
973 "Battery overvoltage protection");
974 return;
975 case 5: /* Thermal shutdown (too hot) */
976 bq2415x_timer_error(bq,
977 "Thermal shutdown (too hot)");
978 return;
979 }
980 }
981
982 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
983}
984
985/**** power supply interface code ****/
986
987static enum power_supply_property bq2415x_power_supply_props[] = {
988 /* TODO: maybe add more power supply properties */
989 POWER_SUPPLY_PROP_STATUS,
990 POWER_SUPPLY_PROP_MODEL_NAME,
991};
992
993static int bq2415x_power_supply_get_property(struct power_supply *psy,
6c47a3e0
AV		 994 enum power_supply_property psp,
995 union power_supply_propval *val)
0bc98cc6 996{
297d716f 997 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 998 int ret;
999
1000 switch (psp) {
1001 case POWER_SUPPLY_PROP_STATUS:
1002 ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
1003 if (ret < 0)
1004 return ret;
1005 else if (ret == 0) /* Ready */
1006 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1007 else if (ret == 1) /* Charge in progress */
1008 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1009 else if (ret == 2) /* Charge done */
1010 val->intval = POWER_SUPPLY_STATUS_FULL;
1011 else
1012 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
1013 break;
1014 case POWER_SUPPLY_PROP_MODEL_NAME:
1015 val->strval = bq->model;
1016 break;
1017 default:
1018 return -EINVAL;
1019 }
1020 return 0;
1021}
1022
1023static int bq2415x_power_supply_init(struct bq2415x_device *bq)
1024{
1025 int ret;
1026 int chip;
1027 char revstr[8];
297d716f 1028 struct power_supply_config psy_cfg = { .drv_data = bq, };
0bc98cc6 1029
297d716f
KK		 1030 bq->charger_desc.name = bq->name;
1031 bq->charger_desc.type = POWER_SUPPLY_TYPE_USB;
1032 bq->charger_desc.properties = bq2415x_power_supply_props;
1033 bq->charger_desc.num_properties =
1034 ARRAY_SIZE(bq2415x_power_supply_props);
1035 bq->charger_desc.get_property = bq2415x_power_supply_get_property;
0bc98cc6
PR		 1036
1037 ret = bq2415x_detect_chip(bq);
1038 if (ret < 0)
1039 chip = BQUNKNOWN;
1040 else
1041 chip = ret;
1042
1043 ret = bq2415x_detect_revision(bq);
1044 if (ret < 0)
1045 strcpy(revstr, "unknown");
1046 else
1047 sprintf(revstr, "1.%d", ret);
1048
1049 bq->model = kasprintf(GFP_KERNEL,
1050 "chip %s, revision %s, vender code %.3d",
1051 bq2415x_chip_name[chip], revstr,
1052 bq2415x_get_vender_code(bq));
1053 if (!bq->model) {
1054 dev_err(bq->dev, "failed to allocate model name\n");
1055 return -ENOMEM;
1056 }
1057
297d716f
KK		 1058 bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
1059 &psy_cfg);
1060 if (IS_ERR(bq->charger)) {
0bc98cc6 1061 kfree(bq->model);
297d716f 1062 return PTR_ERR(bq->charger);
0bc98cc6
PR		 1063 }
1064
1065 return 0;
1066}
1067
1068static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
1069{
1070 bq->autotimer = 0;
1071 if (bq->automode > 0)
1072 bq->automode = 0;
1073 cancel_delayed_work_sync(&bq->work);
297d716f 1074 power_supply_unregister(bq->charger);
0bc98cc6
PR		 1075 kfree(bq->model);
1076}
1077
1078/**** additional sysfs entries for power supply interface ****/
1079
1080/* show *_status entries */
1081static ssize_t bq2415x_sysfs_show_status(struct device *dev,
6c47a3e0
AV		 1082 struct device_attribute *attr,
1083 char *buf)
0bc98cc6
PR		 1084{
1085 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1086 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1087 enum bq2415x_command command;
1088 int ret;
1089
1090 if (strcmp(attr->attr.name, "otg_status") == 0)
1091 command = BQ2415X_OTG_STATUS;
1092 else if (strcmp(attr->attr.name, "charge_status") == 0)
1093 command = BQ2415X_CHARGE_STATUS;
1094 else if (strcmp(attr->attr.name, "boost_status") == 0)
1095 command = BQ2415X_BOOST_STATUS;
1096 else if (strcmp(attr->attr.name, "fault_status") == 0)
1097 command = BQ2415X_FAULT_STATUS;
1098 else
1099 return -EINVAL;
1100
1101 ret = bq2415x_exec_command(bq, command);
1102 if (ret < 0)
1103 return ret;
6c47a3e0 1104 return sprintf(buf, "%d\n", ret);
0bc98cc6
PR		 1105}
1106
6c47a3e0
AV		 1107/*
1108 * set timer entry:
1109 * auto - enable auto mode
1110 * off - disable auto mode
1111 * (other values) - reset chip timer
1112 */
0bc98cc6 1113static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
6c47a3e0
AV		 1114 struct device_attribute *attr,
1115 const char *buf,
1116 size_t count)
0bc98cc6
PR		 1117{
1118 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1119 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1120 int ret = 0;
1121
1122 if (strncmp(buf, "auto", 4) == 0)
1123 bq2415x_set_autotimer(bq, 1);
1124 else if (strncmp(buf, "off", 3) == 0)
1125 bq2415x_set_autotimer(bq, 0);
1126 else
1127 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1128
1129 if (ret < 0)
1130 return ret;
6c47a3e0 1131 return count;
0bc98cc6
PR		 1132}
1133
1134/* show timer entry (auto or off) */
1135static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
6c47a3e0
AV		 1136 struct device_attribute *attr,
1137 char *buf)
0bc98cc6
PR		 1138{
1139 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1140 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1141
1142 if (bq->timer_error)
1143 return sprintf(buf, "%s\n", bq->timer_error);
1144
1145 if (bq->autotimer)
1146 return sprintf(buf, "auto\n");
6c47a3e0 1147 return sprintf(buf, "off\n");
0bc98cc6
PR		 1148}
1149
6c47a3e0
AV		 1150/*
1151 * set mode entry:
1152 * auto - if automode is supported, enable it and set mode to reported
1153 * none - disable charger and boost mode
1154 * host - charging mode for host/hub chargers (current limit 500mA)
1155 * dedicated - charging mode for dedicated chargers (unlimited current limit)
1156 * boost - disable charger and enable boost mode
1157 */
0bc98cc6 1158static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
6c47a3e0
AV		 1159 struct device_attribute *attr,
1160 const char *buf,
1161 size_t count)
0bc98cc6
PR		 1162{
1163 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1164 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1165 enum bq2415x_mode mode;
1166 int ret = 0;
1167
1168 if (strncmp(buf, "auto", 4) == 0) {
1169 if (bq->automode < 0)
f6d8b774 1170 return -EINVAL;
0bc98cc6
PR		 1171 bq->automode = 1;
1172 mode = bq->reported_mode;
ac6324e7
PR		 1173 } else if (strncmp(buf, "off", 3) == 0) {
1174 if (bq->automode > 0)
1175 bq->automode = 0;
1176 mode = BQ2415X_MODE_OFF;
0bc98cc6
PR		 1177 } else if (strncmp(buf, "none", 4) == 0) {
1178 if (bq->automode > 0)
1179 bq->automode = 0;
1180 mode = BQ2415X_MODE_NONE;
1181 } else if (strncmp(buf, "host", 4) == 0) {
1182 if (bq->automode > 0)
1183 bq->automode = 0;
1184 mode = BQ2415X_MODE_HOST_CHARGER;
1185 } else if (strncmp(buf, "dedicated", 9) == 0) {
1186 if (bq->automode > 0)
1187 bq->automode = 0;
1188 mode = BQ2415X_MODE_DEDICATED_CHARGER;
1189 } else if (strncmp(buf, "boost", 5) == 0) {
1190 if (bq->automode > 0)
1191 bq->automode = 0;
1192 mode = BQ2415X_MODE_BOOST;
1193 } else if (strncmp(buf, "reset", 5) == 0) {
1194 bq2415x_reset_chip(bq);
1195 bq2415x_set_defaults(bq);
1196 if (bq->automode <= 0)
1197 return count;
1198 bq->automode = 1;
1199 mode = bq->reported_mode;
6c47a3e0 1200 } else {
0bc98cc6 1201 return -EINVAL;
6c47a3e0 1202 }
0bc98cc6
PR		 1203
1204 ret = bq2415x_set_mode(bq, mode);
1205 if (ret < 0)
1206 return ret;
6c47a3e0 1207 return count;
0bc98cc6
PR		 1208}
1209
1210/* show mode entry (auto, none, host, dedicated or boost) */
1211static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
6c47a3e0
AV		 1212 struct device_attribute *attr,
1213 char *buf)
0bc98cc6
PR		 1214{
1215 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1216 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1217 ssize_t ret = 0;
1218
1219 if (bq->automode > 0)
1220 ret += sprintf(buf+ret, "auto (");
1221
1222 switch (bq->mode) {
ac6324e7
PR		 1223 case BQ2415X_MODE_OFF:
1224 ret += sprintf(buf+ret, "off");
1225 break;
0bc98cc6
PR		 1226 case BQ2415X_MODE_NONE:
1227 ret += sprintf(buf+ret, "none");
1228 break;
1229 case BQ2415X_MODE_HOST_CHARGER:
1230 ret += sprintf(buf+ret, "host");
1231 break;
1232 case BQ2415X_MODE_DEDICATED_CHARGER:
1233 ret += sprintf(buf+ret, "dedicated");
1234 break;
1235 case BQ2415X_MODE_BOOST:
1236 ret += sprintf(buf+ret, "boost");
1237 break;
1238 }
1239
1240 if (bq->automode > 0)
1241 ret += sprintf(buf+ret, ")");
1242
1243 ret += sprintf(buf+ret, "\n");
1244 return ret;
1245}
1246
1247/* show reported_mode entry (none, host, dedicated or boost) */
1248static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
6c47a3e0
AV		 1249 struct device_attribute *attr,
1250 char *buf)
0bc98cc6
PR		 1251{
1252 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1253 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1254
1255 if (bq->automode < 0)
1256 return -EINVAL;
1257
1258 switch (bq->reported_mode) {
ac6324e7
PR		 1259 case BQ2415X_MODE_OFF:
1260 return sprintf(buf, "off\n");
0bc98cc6
PR		 1261 case BQ2415X_MODE_NONE:
1262 return sprintf(buf, "none\n");
1263 case BQ2415X_MODE_HOST_CHARGER:
1264 return sprintf(buf, "host\n");
1265 case BQ2415X_MODE_DEDICATED_CHARGER:
1266 return sprintf(buf, "dedicated\n");
1267 case BQ2415X_MODE_BOOST:
1268 return sprintf(buf, "boost\n");
1269 }
1270
1271 return -EINVAL;
1272}
1273
1274/* directly set raw value to chip register, format: 'register value' */
1275static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
6c47a3e0
AV		 1276 struct device_attribute *attr,
1277 const char *buf,
1278 size_t count)
0bc98cc6
PR		 1279{
1280 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1281 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1282 ssize_t ret = 0;
1283 unsigned int reg;
1284 unsigned int val;
1285
1286 if (sscanf(buf, "%x %x", &reg, &val) != 2)
1287 return -EINVAL;
1288
1289 if (reg > 4 || val > 255)
1290 return -EINVAL;
1291
1292 ret = bq2415x_i2c_write(bq, reg, val);
1293 if (ret < 0)
1294 return ret;
6c47a3e0 1295 return count;
0bc98cc6
PR		 1296}
1297
1298/* print value of chip register, format: 'register=value' */
1299static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
6c47a3e0
AV		 1300 u8 reg,
1301 char *buf)
0bc98cc6
PR		 1302{
1303 int ret = bq2415x_i2c_read(bq, reg);
6c47a3e0 1304
0bc98cc6
PR		 1305 if (ret < 0)
1306 return sprintf(buf, "%#.2x=error %d\n", reg, ret);
6c47a3e0 1307 return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
0bc98cc6
PR		 1308}
1309
1310/* show all raw values of chip register, format per line: 'register=value' */
1311static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
6c47a3e0
AV		 1312 struct device_attribute *attr,
1313 char *buf)
0bc98cc6
PR		 1314{
1315 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1316 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1317 ssize_t ret = 0;
1318
1319 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1320 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1321 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1322 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1323 ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1324 return ret;
1325}
1326
1327/* set current and voltage limit entries (in mA or mV) */
1328static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
6c47a3e0
AV		 1329 struct device_attribute *attr,
1330 const char *buf,
1331 size_t count)
0bc98cc6
PR		 1332{
1333 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1334 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1335 long val;
1336 int ret;
1337
1338 if (kstrtol(buf, 10, &val) < 0)
1339 return -EINVAL;
1340
1341 if (strcmp(attr->attr.name, "current_limit") == 0)
1342 ret = bq2415x_set_current_limit(bq, val);
1343 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1344 ret = bq2415x_set_weak_battery_voltage(bq, val);
1345 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1346 ret = bq2415x_set_battery_regulation_voltage(bq, val);
1347 else if (strcmp(attr->attr.name, "charge_current") == 0)
1348 ret = bq2415x_set_charge_current(bq, val);
1349 else if (strcmp(attr->attr.name, "termination_current") == 0)
1350 ret = bq2415x_set_termination_current(bq, val);
1351 else
1352 return -EINVAL;
1353
1354 if (ret < 0)
1355 return ret;
6c47a3e0 1356 return count;
0bc98cc6
PR		 1357}
1358
1359/* show current and voltage limit entries (in mA or mV) */
1360static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
6c47a3e0
AV		 1361 struct device_attribute *attr,
1362 char *buf)
0bc98cc6
PR		 1363{
1364 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1365 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1366 int ret;
1367
1368 if (strcmp(attr->attr.name, "current_limit") == 0)
1369 ret = bq2415x_get_current_limit(bq);
1370 else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1371 ret = bq2415x_get_weak_battery_voltage(bq);
1372 else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1373 ret = bq2415x_get_battery_regulation_voltage(bq);
1374 else if (strcmp(attr->attr.name, "charge_current") == 0)
1375 ret = bq2415x_get_charge_current(bq);
1376 else if (strcmp(attr->attr.name, "termination_current") == 0)
1377 ret = bq2415x_get_termination_current(bq);
1378 else
1379 return -EINVAL;
1380
1381 if (ret < 0)
1382 return ret;
6c47a3e0 1383 return sprintf(buf, "%d\n", ret);
0bc98cc6
PR		 1384}
1385
1386/* set *_enable entries */
1387static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
6c47a3e0
AV		 1388 struct device_attribute *attr,
1389 const char *buf,
1390 size_t count)
0bc98cc6
PR		 1391{
1392 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1393 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1394 enum bq2415x_command command;
1395 long val;
1396 int ret;
1397
1398 if (kstrtol(buf, 10, &val) < 0)
1399 return -EINVAL;
1400
1401 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1402 command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1403 BQ2415X_CHARGE_TERMINATION_DISABLE;
1404 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1405 command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1406 BQ2415X_HIGH_IMPEDANCE_DISABLE;
1407 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1408 command = val ? BQ2415X_OTG_PIN_ENABLE :
1409 BQ2415X_OTG_PIN_DISABLE;
1410 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1411 command = val ? BQ2415X_STAT_PIN_ENABLE :
1412 BQ2415X_STAT_PIN_DISABLE;
1413 else
1414 return -EINVAL;
1415
1416 ret = bq2415x_exec_command(bq, command);
1417 if (ret < 0)
1418 return ret;
6c47a3e0 1419 return count;
0bc98cc6
PR		 1420}
1421
1422/* show *_enable entries */
1423static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
6c47a3e0
AV		 1424 struct device_attribute *attr,
1425 char *buf)
0bc98cc6
PR		 1426{
1427 struct power_supply *psy = dev_get_drvdata(dev);
297d716f 1428 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
0bc98cc6
PR		 1429 enum bq2415x_command command;
1430 int ret;
1431
1432 if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1433 command = BQ2415X_CHARGE_TERMINATION_STATUS;
1434 else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1435 command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1436 else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1437 command = BQ2415X_OTG_PIN_STATUS;
1438 else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1439 command = BQ2415X_STAT_PIN_STATUS;
1440 else
1441 return -EINVAL;
1442
1443 ret = bq2415x_exec_command(bq, command);
1444 if (ret < 0)
1445 return ret;
6c47a3e0 1446 return sprintf(buf, "%d\n", ret);
0bc98cc6
PR		 1447}
1448
1449static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1450 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1451static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1452 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1453static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1454 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1455static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1456 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1457static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1458 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1459
1460static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1461 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1462static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1463 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1464static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1465 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1466static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1467 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1468
1469static DEVICE_ATTR(reported_mode, S_IRUGO,
1470 bq2415x_sysfs_show_reported_mode, NULL);
1471static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1472 bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1473static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1474 bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1475
1476static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1477 bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1478
1479static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1480static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1481static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1482static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1483
1484static struct attribute *bq2415x_sysfs_attributes[] = {
6c47a3e0
AV		 1485 /*
1486 * TODO: some (appropriate) of these attrs should be switched to
1487 * use power supply class props.
1488 */
0bc98cc6
PR		 1489 &dev_attr_current_limit.attr,
1490 &dev_attr_weak_battery_voltage.attr,
1491 &dev_attr_battery_regulation_voltage.attr,
1492 &dev_attr_charge_current.attr,
1493 &dev_attr_termination_current.attr,
1494
1495 &dev_attr_charge_termination_enable.attr,
1496 &dev_attr_high_impedance_enable.attr,
1497 &dev_attr_otg_pin_enable.attr,
1498 &dev_attr_stat_pin_enable.attr,
1499
1500 &dev_attr_reported_mode.attr,
1501 &dev_attr_mode.attr,
1502 &dev_attr_timer.attr,
1503
1504 &dev_attr_registers.attr,
1505
1506 &dev_attr_otg_status.attr,
1507 &dev_attr_charge_status.attr,
1508 &dev_attr_boost_status.attr,
1509 &dev_attr_fault_status.attr,
1510 NULL,
1511};
1512
1513static const struct attribute_group bq2415x_sysfs_attr_group = {
1514 .attrs = bq2415x_sysfs_attributes,
1515};
1516
1517static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1518{
297d716f 1519 return sysfs_create_group(&bq->charger->dev.kobj,
0bc98cc6
PR		 1520 &bq2415x_sysfs_attr_group);
1521}
1522
1523static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1524{
297d716f 1525 sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
0bc98cc6
PR		 1526}
1527
1528/* main bq2415x probe function */
1529static int bq2415x_probe(struct i2c_client *client,
6c47a3e0 1530 const struct i2c_device_id *id)
0bc98cc6
PR		 1531{
1532 int ret;
1533 int num;
b01e7c3b 1534 char *name = NULL;
0bc98cc6 1535 struct bq2415x_device *bq;
faffd234
SR		 1536 struct device_node *np = client->dev.of_node;
1537 struct bq2415x_platform_data *pdata = client->dev.platform_data;
b01e7c3b 1538 const struct acpi_device_id *acpi_id = NULL;
0bc98cc6 1539
b01e7c3b
AMN		 1540 if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
1541 dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
0bc98cc6
PR		 1542 return -ENODEV;
1543 }
1544
1545 /* Get new ID for the new device */
0bc98cc6 1546 mutex_lock(&bq2415x_id_mutex);
05e2cefa 1547 num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
0bc98cc6 1548 mutex_unlock(&bq2415x_id_mutex);
05e2cefa
TH		 1549 if (num < 0)
1550 return num;
0bc98cc6 1551
b01e7c3b
AMN		 1552 if (id) {
1553 name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1554 } else if (ACPI_HANDLE(&client->dev)) {
1555 acpi_id =
1556 acpi_match_device(client->dev.driver->acpi_match_table,
1557 &client->dev);
1558 name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
1559 }
0bc98cc6
PR		 1560 if (!name) {
1561 dev_err(&client->dev, "failed to allocate device name\n");
1562 ret = -ENOMEM;
1563 goto error_1;
1564 }
1565
a9672e13 1566 bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
0bc98cc6 1567 if (!bq) {
0bc98cc6
PR		 1568 ret = -ENOMEM;
1569 goto error_2;
1570 }
1571
faffd234 1572 if (np) {
f6d8b774
AMN		 1573 bq->notify_psy = power_supply_get_by_phandle(np,
1574 "ti,usb-charger-detection");
faffd234 1575
0eaf437a
KK		 1576 if (IS_ERR(bq->notify_psy)) {
1577 dev_info(&client->dev,
f6d8b774 1578 "no 'ti,usb-charger-detection' property (err=%ld)\n",
0eaf437a
KK		 1579 PTR_ERR(bq->notify_psy));
1580 bq->notify_psy = NULL;
1581 } else if (!bq->notify_psy) {
1582 ret = -EPROBE_DEFER;
1583 goto error_2;
1584 }
b01e7c3b 1585 } else if (pdata && pdata->notify_device) {
faffd234 1586 bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
f6d8b774 1587 } else {
faffd234 1588 bq->notify_psy = NULL;
f6d8b774 1589 }
faffd234 1590
0bc98cc6
PR		 1591 i2c_set_clientdata(client, bq);
1592
1593 bq->id = num;
1594 bq->dev = &client->dev;
b01e7c3b
AMN		 1595 if (id)
1596 bq->chip = id->driver_data;
1597 else if (ACPI_HANDLE(bq->dev))
1598 bq->chip = acpi_id->driver_data;
0bc98cc6 1599 bq->name = name;
ac6324e7
PR		 1600 bq->mode = BQ2415X_MODE_OFF;
1601 bq->reported_mode = BQ2415X_MODE_OFF;
0bc98cc6
PR		 1602 bq->autotimer = 0;
1603 bq->automode = 0;
1604
b01e7c3b
AMN		 1605 if (np || ACPI_HANDLE(bq->dev)) {
1606 ret = device_property_read_u32(bq->dev,
1607 "ti,current-limit",
1608 &bq->init_data.current_limit);
faffd234 1609 if (ret)
1a8dbe6f 1610 goto error_3;
b01e7c3b
AMN		 1611 ret = device_property_read_u32(bq->dev,
1612 "ti,weak-battery-voltage",
1613 &bq->init_data.weak_battery_voltage);
faffd234 1614 if (ret)
1a8dbe6f 1615 goto error_3;
b01e7c3b
AMN		 1616 ret = device_property_read_u32(bq->dev,
1617 "ti,battery-regulation-voltage",
faffd234
SR		 1618 &bq->init_data.battery_regulation_voltage);
1619 if (ret)
1a8dbe6f 1620 goto error_3;
b01e7c3b
AMN		 1621 ret = device_property_read_u32(bq->dev,
1622 "ti,charge-current",
1623 &bq->init_data.charge_current);
faffd234 1624 if (ret)
1a8dbe6f 1625 goto error_3;
b01e7c3b
AMN		 1626 ret = device_property_read_u32(bq->dev,
1627 "ti,termination-current",
1628 &bq->init_data.termination_current);
faffd234 1629 if (ret)
1a8dbe6f 1630 goto error_3;
b01e7c3b
AMN		 1631 ret = device_property_read_u32(bq->dev,
1632 "ti,resistor-sense",
1633 &bq->init_data.resistor_sense);
faffd234 1634 if (ret)
1a8dbe6f 1635 goto error_3;
faffd234
SR		 1636 } else {
1637 memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
1638 }
0bc98cc6
PR		 1639
1640 bq2415x_reset_chip(bq);
1641
1642 ret = bq2415x_power_supply_init(bq);
1643 if (ret) {
1644 dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1a8dbe6f 1645 goto error_3;
0bc98cc6
PR		 1646 }
1647
1648 ret = bq2415x_sysfs_init(bq);
1649 if (ret) {
1650 dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1a8dbe6f 1651 goto error_4;
0bc98cc6
PR		 1652 }
1653
1654 ret = bq2415x_set_defaults(bq);
1655 if (ret) {
1656 dev_err(bq->dev, "failed to set default values: %d\n", ret);
1a8dbe6f 1657 goto error_5;
0bc98cc6
PR		 1658 }
1659
faffd234 1660 if (bq->notify_psy) {
32260308
PR		 1661 bq->nb.notifier_call = bq2415x_notifier_call;
1662 ret = power_supply_reg_notifier(&bq->nb);
1663 if (ret) {
1664 dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
1a8dbe6f 1665 goto error_6;
32260308 1666 }
faffd234
SR		 1667
1668 /* Query for initial reported_mode and set it */
f6d8b774
AMN		 1669 bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED,
1670 bq->notify_psy);
faffd234
SR		 1671 bq2415x_set_mode(bq, bq->reported_mode);
1672
32260308
PR		 1673 bq->automode = 1;
1674 dev_info(bq->dev, "automode enabled\n");
0bc98cc6
PR		 1675 } else {
1676 bq->automode = -1;
1677 dev_info(bq->dev, "automode not supported\n");
1678 }
1679
1680 INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1681 bq2415x_set_autotimer(bq, 1);
1682
1683 dev_info(bq->dev, "driver registered\n");
1684 return 0;
1685
1a8dbe6f 1686error_6:
32260308 1687error_5:
a9672e13 1688 bq2415x_sysfs_exit(bq);
1a8dbe6f 1689error_4:
a9672e13 1690 bq2415x_power_supply_exit(bq);
1a8dbe6f
KK		 1691error_3:
1692 if (bq->notify_psy)
1693 power_supply_put(bq->notify_psy);
0bc98cc6
PR		 1694error_2:
1695 kfree(name);
1696error_1:
1697 mutex_lock(&bq2415x_id_mutex);
1698 idr_remove(&bq2415x_id, num);
1699 mutex_unlock(&bq2415x_id_mutex);
1700
1701 return ret;
1702}
1703
1704/* main bq2415x remove function */
1705
1706static int bq2415x_remove(struct i2c_client *client)
1707{
1708 struct bq2415x_device *bq = i2c_get_clientdata(client);
1709
1a8dbe6f 1710 if (bq->notify_psy) {
32260308 1711 power_supply_unreg_notifier(&bq->nb);
1a8dbe6f
KK		 1712 power_supply_put(bq->notify_psy);
1713 }
0bc98cc6
PR		 1714
1715 bq2415x_sysfs_exit(bq);
1716 bq2415x_power_supply_exit(bq);
1717
1718 bq2415x_reset_chip(bq);
1719
1720 mutex_lock(&bq2415x_id_mutex);
1721 idr_remove(&bq2415x_id, bq->id);
1722 mutex_unlock(&bq2415x_id_mutex);
1723
1724 dev_info(bq->dev, "driver unregistered\n");
1725
1726 kfree(bq->name);
0bc98cc6
PR		 1727
1728 return 0;
1729}
1730
1731static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1732 { "bq2415x", BQUNKNOWN },
1733 { "bq24150", BQ24150 },
1734 { "bq24150a", BQ24150A },
1735 { "bq24151", BQ24151 },
1736 { "bq24151a", BQ24151A },
1737 { "bq24152", BQ24152 },
1738 { "bq24153", BQ24153 },
1739 { "bq24153a", BQ24153A },
1740 { "bq24155", BQ24155 },
1741 { "bq24156", BQ24156 },
1742 { "bq24156a", BQ24156A },
0e1392d9 1743 { "bq24157s", BQ24157S },
0bc98cc6
PR		 1744 { "bq24158", BQ24158 },
1745 {},
1746};
1747MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1748
b01e7c3b
AMN		 1749static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
1750 { "BQ2415X", BQUNKNOWN },
1751 { "BQ241500", BQ24150 },
1752 { "BQA24150", BQ24150A },
1753 { "BQ241510", BQ24151 },
1754 { "BQA24151", BQ24151A },
1755 { "BQ241520", BQ24152 },
1756 { "BQ241530", BQ24153 },
1757 { "BQA24153", BQ24153A },
1758 { "BQ241550", BQ24155 },
1759 { "BQ241560", BQ24156 },
1760 { "BQA24156", BQ24156A },
1761 { "BQS24157", BQ24157S },
1762 { "BQ241580", BQ24158 },
1763 {},
1764};
1765MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
1766
0bc98cc6
PR		 1767static struct i2c_driver bq2415x_driver = {
1768 .driver = {
1769 .name = "bq2415x-charger",
b01e7c3b 1770 .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
0bc98cc6
PR		 1771 },
1772 .probe = bq2415x_probe,
1773 .remove = bq2415x_remove,
1774 .id_table = bq2415x_i2c_id_table,
1775};
463df514 1776module_i2c_driver(bq2415x_driver);
0bc98cc6
PR		 1777
1778MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1779MODULE_DESCRIPTION("bq2415x charger driver");
1780MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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