1 --- /dev/null 2012-04-29 08:55:34.366920721 +0200
2 +++ kernel-power/drivers/power/bq2415x_charger.c 2012-04-29 17:53:57.799826239 +0200
5 + bq2415x_charger.c - bq2415x charger driver
6 + Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
8 + This program is free software; you can redistribute it and/or modify
9 + it under the terms of the GNU General Public License as published by
10 + the Free Software Foundation; either version 2 of the License, or
11 + (at your option) any later version.
13 + This program is distributed in the hope that it will be useful,
14 + but WITHOUT ANY WARRANTY; without even the implied warranty of
15 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 + GNU General Public License for more details.
18 + You should have received a copy of the GNU General Public License along
19 + with this program; if not, write to the Free Software Foundation, Inc.,
20 + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 + http://www.ti.com/product/bq24150
26 + http://www.ti.com/product/bq24150a
27 + http://www.ti.com/product/bq24152
28 + http://www.ti.com/product/bq24153
29 + http://www.ti.com/product/bq24153a
30 + http://www.ti.com/product/bq24155
33 +#include <linux/version.h>
34 +#include <linux/module.h>
35 +#include <linux/param.h>
36 +#include <linux/err.h>
37 +#include <linux/workqueue.h>
38 +#include <linux/sysfs.h>
39 +#include <linux/platform_device.h>
40 +#include <linux/power_supply.h>
41 +#include <linux/idr.h>
42 +#include <linux/i2c.h>
43 +#include <linux/slab.h>
45 +#include <linux/power/bq2415x_charger.h>
47 +#define BQ2415X_TIMER_TIMEOUT 10
49 +#define BQ2415X_REG_STATUS 0x00
50 +#define BQ2415X_REG_CONTROL 0x01
51 +#define BQ2415X_REG_VOLTAGE 0x02
52 +#define BQ2415X_REG_VENDER 0x03
53 +#define BQ2415X_REG_CURRENT 0x04
55 +/* reset state for all registers */
56 +#define BQ2415X_RESET_STATUS BIT(6)
57 +#define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
58 +#define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
59 +#define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
61 +/* status register */
62 +#define BQ2415X_BIT_TMR_RST 7
63 +#define BQ2415X_BIT_OTG 7
64 +#define BQ2415X_BIT_EN_STAT 6
65 +#define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
66 +#define BQ2415X_SHIFT_STAT 4
67 +#define BQ2415X_BIT_BOOST 3
68 +#define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
69 +#define BQ2415X_SHIFT_FAULT 0
71 +/* control register */
72 +#define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
73 +#define BQ2415X_SHIFT_LIMIT 6
74 +#define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
75 +#define BQ2415X_SHIFT_VLOWV 4
76 +#define BQ2415X_BIT_TE 3
77 +#define BQ2415X_BIT_CE 2
78 +#define BQ2415X_BIT_HZ_MODE 1
79 +#define BQ2415X_BIT_OPA_MODE 0
81 +/* voltage register */
82 +#define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
83 +#define BQ2415X_SHIFT_VO 2
84 +#define BQ2415X_BIT_OTG_PL 1
85 +#define BQ2415X_BIT_OTG_EN 0
87 +/* vender register */
88 +#define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
89 +#define BQ2415X_SHIFT_VENDER 5
90 +#define BQ2415X_MASK_PN (BIT(3)|BIT(4))
91 +#define BQ2415X_SHIFT_PN 3
92 +#define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
93 +#define BQ2415X_SHIFT_REVISION 0
95 +/* current register */
97 +#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)|BIT(7))
98 +#define BQ2415X_SHIFT_VI_CHRG 4
100 +#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)|BIT(7))
101 +#define BQ2415X_SHIFT_VI_TERM 0
104 +enum bq2415x_command {
105 + BQ2415X_TIMER_RESET,
106 + BQ2415X_OTG_STATUS,
107 + BQ2415X_STAT_PIN_STATUS,
108 + BQ2415X_STAT_PIN_ENABLE,
109 + BQ2415X_STAT_PIN_DISABLE,
110 + BQ2415X_CHARGE_STATUS,
111 + BQ2415X_BOOST_STATUS,
112 + BQ2415X_FAULT_STATUS,
114 + BQ2415X_CHARGE_TERMINATION_STATUS,
115 + BQ2415X_CHARGE_TERMINATION_ENABLE,
116 + BQ2415X_CHARGE_TERMINATION_DISABLE,
117 + BQ2415X_CHARGER_STATUS,
118 + BQ2415X_CHARGER_ENABLE,
119 + BQ2415X_CHARGER_DISABLE,
120 + BQ2415X_HIGH_IMPEDANCE_STATUS,
121 + BQ2415X_HIGH_IMPEDANCE_ENABLE,
122 + BQ2415X_HIGH_IMPEDANCE_DISABLE,
123 + BQ2415X_BOOST_MODE_STATUS,
124 + BQ2415X_BOOST_MODE_ENABLE,
125 + BQ2415X_BOOST_MODE_DISABLE,
128 + BQ2415X_OTG_ACTIVATE_HIGH,
129 + BQ2415X_OTG_ACTIVATE_LOW,
130 + BQ2415X_OTG_PIN_STATUS,
131 + BQ2415X_OTG_PIN_ENABLE,
132 + BQ2415X_OTG_PIN_DISABLE,
134 + BQ2415X_VENDER_CODE,
135 + BQ2415X_PART_NUMBER,
156 + BQ2415X_MODE_HOST_CHARGER,
157 + BQ2415X_MODE_DEDICATED_CHARGER,
158 + BQ2415X_MODE_BOOST,
161 +static char *bq2415x_chip_name[] = {
176 +struct bq2415x_device {
177 + struct device *dev;
178 + struct bq2415x_platform_data init_data;
179 + struct power_supply charger;
180 + struct delayed_work work;
181 + enum bq2415x_mode charger_mode; /* mode reported by hook function */
182 + enum bq2415x_mode mode; /* actual setted mode */
183 + enum bq2415x_chip chip;
186 + int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
187 + int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
191 +static DEFINE_IDR(bq2415x_id);
193 +static DEFINE_MUTEX(bq2415x_id_mutex);
194 +static DEFINE_MUTEX(bq2415x_timer_mutex);
195 +static DEFINE_MUTEX(bq2415x_i2c_mutex);
197 +/* i2c read functions */
199 +static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
201 + struct i2c_client *client = to_i2c_client(bq->dev);
202 + struct i2c_msg msg[2];
206 + if (!client->adapter)
209 + msg[0].addr = client->addr;
212 + msg[0].len = sizeof(reg);
213 + msg[1].addr = client->addr;
214 + msg[1].flags = I2C_M_RD;
216 + msg[1].len = sizeof(val);
218 + mutex_lock(&bq2415x_i2c_mutex);
219 + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
220 + mutex_unlock(&bq2415x_i2c_mutex);
228 +static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
236 + ret = bq2415x_i2c_read(bq, reg);
240 + return (ret & mask) >> shift;
243 +static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
248 + return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
251 +/* i2c write functions */
253 +static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
255 + struct i2c_client *client = to_i2c_client(bq->dev);
256 + struct i2c_msg msg[1];
263 + msg[0].addr = client->addr;
266 + msg[0].len = ARRAY_SIZE(data);
268 + mutex_lock(&bq2415x_i2c_mutex);
269 + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
270 + mutex_unlock(&bq2415x_i2c_mutex);
272 + /* i2c_transfer returns number of messages transferred */
281 +static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
289 + ret = bq2415x_i2c_read(bq, reg);
294 + ret |= val << shift;
296 + return bq2415x_i2c_write(bq, reg, ret);
299 +static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
305 + return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
308 +/* global exec command function */
310 +static int bq2415x_exec_command(struct bq2415x_device *bq,
311 + enum bq2415x_command command)
315 + case BQ2415X_TIMER_RESET:
316 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
317 + 1, BQ2415X_BIT_TMR_RST);
318 + case BQ2415X_OTG_STATUS:
319 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
321 + case BQ2415X_STAT_PIN_STATUS:
322 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
323 + BQ2415X_BIT_EN_STAT);
324 + case BQ2415X_STAT_PIN_ENABLE:
325 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
326 + BQ2415X_BIT_EN_STAT);
327 + case BQ2415X_STAT_PIN_DISABLE:
328 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
329 + BQ2415X_BIT_EN_STAT);
330 + case BQ2415X_CHARGE_STATUS:
331 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
332 + BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
333 + case BQ2415X_BOOST_STATUS:
334 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
335 + BQ2415X_BIT_BOOST);
336 + case BQ2415X_FAULT_STATUS:
337 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
338 + BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
340 + case BQ2415X_CHARGE_TERMINATION_STATUS:
341 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
343 + case BQ2415X_CHARGE_TERMINATION_ENABLE:
344 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
345 + 1, BQ2415X_BIT_TE);
346 + case BQ2415X_CHARGE_TERMINATION_DISABLE:
347 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
348 + 0, BQ2415X_BIT_TE);
349 + case BQ2415X_CHARGER_STATUS:
350 + ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
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);
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);
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);
415 +/* global detect chip */
417 +static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
419 + struct i2c_client *client = to_i2c_client(bq->dev);
420 + int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
425 + switch (client->addr) {
429 + if (bq->chip == BQ24151A)
434 + if (bq->chip == BQ24150A ||
435 + bq->chip == BQ24152 ||
436 + bq->chip == BQ24155)
441 + if (bq->chip == BQ24153A)
453 + if (bq->chip == BQ24156A)
468 +static int bq2415x_detect_revision(struct bq2415x_device *bq)
470 + int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
471 + int chip = bq2415x_detect_chip(bq);
472 + if (ret < 0 || chip < 0)
481 + if (ret >= 0 && ret <= 3)
511 +static int bq2415x_get_vender_code(struct bq2415x_device *bq)
513 + int ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
516 + else /* convert to binary */
517 + return (ret & 0x1) +
518 + ((ret >> 1) & 0x1) * 10 +
519 + ((ret >> 2) & 0x1) * 100;
522 +/* global other functions */
524 +static void bq2415x_reset_chip(struct bq2415x_device *bq)
526 + bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
527 + bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
528 + bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
529 + bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
532 +static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
537 + else if (mA <= 500)
539 + else if (mA <= 800)
543 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
544 + BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
547 +static int bq2415x_get_current_limit(struct bq2415x_device *bq)
549 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
550 + BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
565 +static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
567 + int val = mV/100 + (mV%100 > 0 ? 1 : 0) - 34;
574 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
575 + BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
578 +static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
580 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
581 + BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
585 + return 100 * (34 + ret);
588 +static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
591 + int val = (mV/10 + (mV%10 > 0 ? 1 : 0) - 350) / 2;
595 + else if (val > 94) /* FIXME: Max is 94 or 122 ? */
598 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
599 + BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
602 +static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
604 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
605 + BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
609 + return 10 * (350 + 2*ret);
612 +static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
615 + if (bq->init_data.resistor_sense <= 0)
618 + val = (mA * bq->init_data.resistor_sense - 37400);
619 + val = val/6800 + (val%6800 > 0 ? 1 : 0);
626 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
627 + BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
630 +static int bq2415x_get_charge_current(struct bq2415x_device *bq)
633 + if (bq->init_data.resistor_sense <= 0)
636 + ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
637 + BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
641 + return (37400 + 6800*ret) / bq->init_data.resistor_sense;
644 +static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
647 + if (bq->init_data.resistor_sense <= 0)
650 + val = (mA * bq->init_data.resistor_sense - 3400);
651 + val = val/3400 + (val%3400 > 0 ? 1 : 0);
658 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
659 + BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
662 +static int bq2415x_get_termination_current(struct bq2415x_device *bq)
665 + if (bq->init_data.resistor_sense <= 0)
668 + ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
669 + BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
673 + return (3400 + 3400*ret) / bq->init_data.resistor_sense;
676 +#define bq2415x_set_default_value(bq, value) \
679 + if (bq->init_data.value != -1) \
680 + ret = bq2415x_set_##value(bq, bq->init_data.value); \
685 +static int bq2415x_set_defaults(struct bq2415x_device *bq)
687 + bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
688 + bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
689 + bq2415x_set_default_value(bq, current_limit);
690 + bq2415x_set_default_value(bq, weak_battery_voltage);
691 + bq2415x_set_default_value(bq, battery_regulation_voltage);
692 + if (bq->init_data.resistor_sense > 0) {
693 + bq2415x_set_default_value(bq, charge_current);
694 + bq2415x_set_default_value(bq, termination_current);
695 + bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
697 + bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
701 +#undef bq2415x_set_default_value
703 +/* charger mode functions */
705 +static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
710 + if (mode == BQ2415X_MODE_NONE ||
711 + mode == BQ2415X_MODE_HOST_CHARGER ||
712 + mode == BQ2415X_MODE_DEDICATED_CHARGER)
716 + ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
718 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
724 + case BQ2415X_MODE_NONE:
725 + dev_info(bq->dev, "mode: N/A\n");
726 + ret = bq2415x_set_current_limit(bq, 100);
728 + case BQ2415X_MODE_HOST_CHARGER:
729 + dev_info(bq->dev, "mode: Host/HUB charger\n");
730 + ret = bq2415x_set_current_limit(bq, 500);
732 + case BQ2415X_MODE_DEDICATED_CHARGER:
733 + dev_info(bq->dev, "mode: Dedicated charger\n");
734 + ret = bq2415x_set_current_limit(bq, 1800);
736 + case BQ2415X_MODE_BOOST: /* Boost mode */
737 + dev_info(bq->dev, "mode: Boost\n");
738 + ret = bq2415x_set_current_limit(bq, 100);
746 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
748 + ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
758 +static void bq2415x_set_charger_type(int type, void *data)
760 + struct bq2415x_device *bq = data;
767 + bq->charger_mode = BQ2415X_MODE_NONE;
770 + bq->charger_mode = BQ2415X_MODE_HOST_CHARGER;
773 + bq->charger_mode = BQ2415X_MODE_DEDICATED_CHARGER;
779 + if (bq->automode < 1)
782 + /* TODO: Detect USB Host mode */
784 + bq2415x_set_mode(bq, bq->charger_mode);
788 +/* timer functions */
790 +static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
792 + mutex_lock(&bq2415x_timer_mutex);
794 + if (bq->autotimer == state) {
795 + mutex_unlock(&bq2415x_timer_mutex);
799 + bq->autotimer = state;
802 + schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
803 + bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
805 + cancel_delayed_work_sync(&bq->work);
808 + mutex_unlock(&bq2415x_timer_mutex);
811 +static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
813 + dev_err(bq->dev, "%s\n", msg);
814 + if (bq->automode > 0)
816 + bq2415x_set_mode(bq, BQ2415X_MODE_NONE);
817 + bq2415x_set_autotimer(bq, 0);
820 +static void bq2415x_timer_work(struct work_struct *work)
822 + struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
824 + int ret, error, boost;
826 + if (!bq->autotimer)
829 + ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
831 + bq2415x_timer_error(bq, "Reseting timer failed");
835 + boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
837 + bq2415x_timer_error(bq, "Unknow error");
841 + error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
843 + bq2415x_timer_error(bq, "Unknow error");
849 + case 0: /* No error */
851 + case 6: /* Timer expired */
852 + dev_err(bq->dev, "Timer expired\n");
854 + case 3: /* Battery voltage too low */
855 + dev_err(bq->dev, "Battery voltage to low\n");
858 + case 1: /* Overvoltage protection (chip fried) */
859 + bq2415x_timer_error(bq,
860 + "Overvolatge protection (chip fried)");
862 + case 2: /* Overload */
863 + bq2415x_timer_error(bq, "Overload");
865 + case 4: /* Battery overvoltage protection */
866 + bq2415x_timer_error(bq,
867 + "Battery overvoltage protection");
869 + case 5: /* Thermal shutdown (too hot) */
870 + bq2415x_timer_error(bq,
871 + "Thermal shutdown (too hot)");
874 + bq2415x_timer_error(bq, "Unknown error");
879 + case 0: /* No error */
881 + case 2: /* Sleep mode */
882 + dev_err(bq->dev, "Sleep mode\n");
884 + case 3: /* Poor input source */
885 + dev_err(bq->dev, "Poor input source\n");
887 + case 6: /* Timer expired */
888 + dev_err(bq->dev, "Timer expired\n");
890 + case 7: /* No battery */
891 + dev_err(bq->dev, "No battery\n");
894 + case 1: /* Overvoltage protection (chip fried) */
895 + bq2415x_timer_error(bq,
896 + "Overvolatge protection (chip fried)");
898 + case 4: /* Battery overvoltage protection */
899 + bq2415x_timer_error(bq,
900 + "Battery overvoltage protection");
902 + case 5: /* Thermal shutdown (too hot) */
903 + bq2415x_timer_error(bq,
904 + "Thermal shutdown (too hot)");
909 + schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
914 +static enum power_supply_property bq2415x_power_supply_props[] = {
915 + /* TODO: more power supply properties */
916 + POWER_SUPPLY_PROP_STATUS,
917 + POWER_SUPPLY_PROP_MODEL_NAME,
920 +static int bq2415x_power_supply_get_property(struct power_supply *psy,
921 + enum power_supply_property psp, union power_supply_propval *val)
923 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
928 + case POWER_SUPPLY_PROP_STATUS:
929 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
932 + else if (ret == 0) /* Ready */
933 + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
934 + else if (ret == 1) /* Charge in progress */
935 + val->intval = POWER_SUPPLY_STATUS_CHARGING;
936 + else if (ret == 2) /* Charge done */
937 + val->intval = POWER_SUPPLY_STATUS_FULL;
939 + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
941 + case POWER_SUPPLY_PROP_MODEL_NAME:
942 + val->strval = bq->model;
950 +static int bq2415x_power_supply_init(struct bq2415x_device *bq)
956 + bq->charger.name = bq->name;
957 + bq->charger.type = POWER_SUPPLY_TYPE_USB;
958 + bq->charger.properties = bq2415x_power_supply_props;
959 + bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props);
960 + bq->charger.get_property = bq2415x_power_supply_get_property;
962 + ret = bq2415x_detect_chip(bq);
968 + ret = bq2415x_detect_revision(bq);
970 + strcpy(revstr, "unknown");
972 + sprintf(revstr, "1.%d", ret);
974 + bq->model = kasprintf(GFP_KERNEL,
975 + "chip %s, revision %s, vender code %.3d",
976 + bq2415x_chip_name[chip], revstr,
977 + bq2415x_get_vender_code(bq));
979 + dev_err(bq->dev, "failed to allocate model name\n");
983 + ret = power_supply_register(bq->dev, &bq->charger);
992 +static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
995 + if (bq->automode > 0)
997 + cancel_delayed_work_sync(&bq->work);
998 + power_supply_unregister(&bq->charger);
1004 +static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1005 + struct device_attribute *attr, char *buf)
1007 + struct power_supply *psy = dev_get_drvdata(dev);
1008 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1010 + enum bq2415x_command command;
1013 + if (strcmp(attr->attr.name, "otg_status") == 0)
1014 + command = BQ2415X_OTG_STATUS;
1015 + else if (strcmp(attr->attr.name, "charge_status") == 0)
1016 + command = BQ2415X_CHARGE_STATUS;
1017 + else if (strcmp(attr->attr.name, "boost_status") == 0)
1018 + command = BQ2415X_BOOST_STATUS;
1019 + else if (strcmp(attr->attr.name, "fault_status") == 0)
1020 + command = BQ2415X_FAULT_STATUS;
1024 + ret = bq2415x_exec_command(bq, command);
1028 + return sprintf(buf, "%d\n", ret);
1031 +static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1032 + struct device_attribute *attr, const char *buf, size_t count)
1034 + struct power_supply *psy = dev_get_drvdata(dev);
1035 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1039 + if (strncmp(buf, "auto", 4) == 0)
1040 + bq2415x_set_autotimer(bq, 1);
1041 + else if (strncmp(buf, "off", 3) == 0)
1042 + bq2415x_set_autotimer(bq, 0);
1044 + ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1052 +static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1053 + struct device_attribute *attr, char *buf)
1055 + struct power_supply *psy = dev_get_drvdata(dev);
1056 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1059 + if (bq->autotimer)
1060 + return sprintf(buf, "auto\n");
1062 + return sprintf(buf, "off\n");
1065 +static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1066 + struct device_attribute *attr, const char *buf, size_t count)
1068 + struct power_supply *psy = dev_get_drvdata(dev);
1069 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1071 + enum bq2415x_mode mode;
1074 + if (strncmp(buf, "auto", 4) == 0) {
1075 + if (bq->automode < 0)
1078 + mode = bq->charger_mode;
1079 + } else if (strncmp(buf, "none", 4) == 0) {
1080 + if (bq->automode > 0)
1082 + mode = BQ2415X_MODE_NONE;
1083 + } else if (strncmp(buf, "host", 4) == 0) {
1084 + if (bq->automode > 0)
1086 + mode = BQ2415X_MODE_HOST_CHARGER;
1087 + } else if (strncmp(buf, "dedicated", 9) == 0) {
1088 + if (bq->automode > 0)
1090 + mode = BQ2415X_MODE_DEDICATED_CHARGER;
1091 + } else if (strncmp(buf, "boost", 5) == 0) {
1092 + if (bq->automode > 0)
1094 + mode = BQ2415X_MODE_BOOST;
1095 + } else if (strncmp(buf, "reset", 5) == 0) {
1096 + bq2415x_reset_chip(bq);
1097 + bq2415x_set_defaults(bq);
1098 + if (bq->automode > 0)
1104 + ret = bq2415x_set_mode(bq, mode);
1111 +static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1112 + struct device_attribute *attr, char *buf)
1114 + struct power_supply *psy = dev_get_drvdata(dev);
1115 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1119 + if (bq->automode > 0)
1120 + ret += sprintf(buf+ret, "auto (");
1122 + switch (bq->mode) {
1123 + case BQ2415X_MODE_NONE:
1124 + ret += sprintf(buf+ret, "none");
1126 + case BQ2415X_MODE_HOST_CHARGER:
1127 + ret += sprintf(buf+ret, "host");
1129 + case BQ2415X_MODE_DEDICATED_CHARGER:
1130 + ret += sprintf(buf+ret, "dedicated");
1132 + case BQ2415X_MODE_BOOST:
1133 + ret += sprintf(buf+ret, "boost");
1137 + if (bq->automode > 0)
1138 + ret += sprintf(buf+ret, ")");
1140 + ret += sprintf(buf+ret, "\n");
1144 +static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1145 + struct device_attribute *attr, const char *buf, size_t count)
1147 + struct power_supply *psy = dev_get_drvdata(dev);
1148 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1155 + reg = simple_strtol(buf, &end, 16);
1156 + if (reg < 0 || reg > 4)
1159 + val = simple_strtol(end+1, NULL, 16);
1160 + if (val < 0 || val > 255)
1163 + ret = bq2415x_i2c_write(bq, reg, val);
1170 +static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1171 + u8 reg, char *buf)
1173 + int ret = bq2415x_i2c_read(bq, reg);
1175 + return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1177 + return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1180 +static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1181 + struct device_attribute *attr, char *buf)
1183 + struct power_supply *psy = dev_get_drvdata(dev);
1184 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1188 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1189 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1190 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1191 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1192 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1196 +/* Current & Volatage settings */
1198 +static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1199 + struct device_attribute *attr, const char *buf, size_t count)
1201 + struct power_supply *psy = dev_get_drvdata(dev);
1202 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1207 + if (strict_strtol(buf, 10, &val) < 0)
1210 + if (strcmp(attr->attr.name, "current_limit") == 0)
1211 + ret = bq2415x_set_current_limit(bq, val);
1212 + else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1213 + ret = bq2415x_set_weak_battery_voltage(bq, val);
1214 + else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1215 + ret = bq2415x_set_battery_regulation_voltage(bq, val);
1216 + else if (strcmp(attr->attr.name, "charge_current") == 0)
1217 + ret = bq2415x_set_charge_current(bq, val);
1218 + else if (strcmp(attr->attr.name, "termination_current") == 0)
1219 + ret = bq2415x_set_termination_current(bq, val);
1229 +static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1230 + struct device_attribute *attr, char *buf)
1232 + struct power_supply *psy = dev_get_drvdata(dev);
1233 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1237 + if (strcmp(attr->attr.name, "current_limit") == 0)
1238 + ret = bq2415x_get_current_limit(bq);
1239 + else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1240 + ret = bq2415x_get_weak_battery_voltage(bq);
1241 + else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1242 + ret = bq2415x_get_battery_regulation_voltage(bq);
1243 + else if (strcmp(attr->attr.name, "charge_current") == 0)
1244 + ret = bq2415x_get_charge_current(bq);
1245 + else if (strcmp(attr->attr.name, "termination_current") == 0)
1246 + ret = bq2415x_get_termination_current(bq);
1253 + return sprintf(buf, "%d\n", ret);
1256 +static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1257 + struct device_attribute *attr, const char *buf, size_t count)
1259 + struct power_supply *psy = dev_get_drvdata(dev);
1260 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1262 + enum bq2415x_command command;
1266 + if (strict_strtol(buf, 10, &val) < 0)
1269 + if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1270 + command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1271 + BQ2415X_CHARGE_TERMINATION_DISABLE;
1272 + else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1273 + command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1274 + BQ2415X_HIGH_IMPEDANCE_DISABLE;
1275 + else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1276 + command = val ? BQ2415X_OTG_PIN_ENABLE :
1277 + BQ2415X_OTG_PIN_DISABLE;
1278 + else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1279 + command = val ? BQ2415X_STAT_PIN_ENABLE :
1280 + BQ2415X_STAT_PIN_DISABLE;
1284 + ret = bq2415x_exec_command(bq, command);
1291 +static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1292 + struct device_attribute *attr, char *buf)
1294 + struct power_supply *psy = dev_get_drvdata(dev);
1295 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1297 + enum bq2415x_command command;
1300 + if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1301 + command = BQ2415X_CHARGE_TERMINATION_STATUS;
1302 + else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1303 + command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1304 + else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1305 + command = BQ2415X_OTG_PIN_STATUS;
1306 + else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1307 + command = BQ2415X_STAT_PIN_STATUS;
1311 + ret = bq2415x_exec_command(bq, command);
1315 + return sprintf(buf, "%d\n", ret);
1318 +static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1319 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1320 +static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1321 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1322 +static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1323 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1324 +static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1325 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1326 +static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1327 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1329 +static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1330 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1331 +static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1332 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1333 +static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1334 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1335 +static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1336 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1338 +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1339 + bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1340 +static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1341 + bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1343 +static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1344 + bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1346 +static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1347 +static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1348 +static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1349 +static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1351 +static struct attribute *bq2415x_sysfs_attributes[] = {
1352 + &dev_attr_current_limit.attr,
1353 + &dev_attr_weak_battery_voltage.attr,
1354 + &dev_attr_battery_regulation_voltage.attr,
1355 + &dev_attr_charge_current.attr,
1356 + &dev_attr_termination_current.attr,
1358 + &dev_attr_charge_termination_enable.attr,
1359 + &dev_attr_high_impedance_enable.attr,
1360 + &dev_attr_otg_pin_enable.attr,
1361 + &dev_attr_stat_pin_enable.attr,
1363 + &dev_attr_mode.attr,
1364 + &dev_attr_timer.attr,
1366 + &dev_attr_registers.attr,
1368 + &dev_attr_otg_status.attr,
1369 + &dev_attr_charge_status.attr,
1370 + &dev_attr_boost_status.attr,
1371 + &dev_attr_fault_status.attr,
1375 +static const struct attribute_group bq2415x_sysfs_attr_group = {
1376 + .attrs = bq2415x_sysfs_attributes,
1379 +static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1381 + return sysfs_create_group(&bq->charger.dev->kobj,
1382 + &bq2415x_sysfs_attr_group);
1385 +static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1387 + sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
1390 +/* bq2415x register */
1392 +static int bq2415x_probe(struct i2c_client *client,
1393 + const struct i2c_device_id *id)
1398 + struct bq2415x_device *bq;
1400 + if (!client->dev.platform_data) {
1401 + dev_err(&client->dev, "platform data not set\n");
1405 + /* Get new ID for the new device */
1406 + ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
1410 + mutex_lock(&bq2415x_id_mutex);
1411 + ret = idr_get_new(&bq2415x_id, client, &num);
1412 + mutex_unlock(&bq2415x_id_mutex);
1417 + name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1419 + dev_err(&client->dev, "failed to allocate device name\n");
1424 + bq = kzalloc(sizeof(*bq), GFP_KERNEL);
1426 + dev_err(&client->dev, "failed to allocate device data\n");
1431 + i2c_set_clientdata(client, bq);
1434 + bq->dev = &client->dev;
1435 + bq->chip = id->driver_data;
1437 + bq->mode = BQ2415X_MODE_NONE;
1438 + bq->charger_mode = BQ2415X_MODE_NONE;
1439 + bq->autotimer = 0;
1442 + memcpy(&bq->init_data, client->dev.platform_data,
1443 + sizeof(bq->init_data));
1445 + bq2415x_reset_chip(bq);
1447 + ret = bq2415x_power_supply_init(bq);
1449 + dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1453 + ret = bq2415x_sysfs_init(bq);
1455 + dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1459 + ret = bq2415x_set_defaults(bq);
1461 + dev_err(bq->dev, "failed to set default values: %d\n", ret);
1465 + if (bq->init_data.set_charger_type_hook) {
1466 + if (bq->init_data.set_charger_type_hook(
1467 + bq2415x_set_charger_type, bq)) {
1469 + dev_info(bq->dev, "automode enabled\n");
1471 + bq->automode = -1;
1472 + dev_info(bq->dev, "automode not supported\n");
1475 + bq->automode = -1;
1476 + dev_info(bq->dev, "automode not supported\n");
1479 + INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1480 + bq2415x_set_autotimer(bq, 1);
1482 + dev_info(bq->dev, "driver registred\n");
1486 + bq2415x_sysfs_exit(bq);
1488 + bq2415x_power_supply_exit(bq);
1494 + mutex_lock(&bq2415x_id_mutex);
1495 + idr_remove(&bq2415x_id, num);
1496 + mutex_unlock(&bq2415x_id_mutex);
1501 +/* bq2415x unregister */
1503 +static int bq2415x_remove(struct i2c_client *client)
1505 + struct bq2415x_device *bq = i2c_get_clientdata(client);
1507 + if (bq->init_data.set_charger_type_hook)
1508 + bq->init_data.set_charger_type_hook(NULL, NULL);
1510 + bq2415x_sysfs_exit(bq);
1511 + bq2415x_power_supply_exit(bq);
1513 + bq2415x_reset_chip(bq);
1515 + mutex_lock(&bq2415x_id_mutex);
1516 + idr_remove(&bq2415x_id, bq->id);
1517 + mutex_unlock(&bq2415x_id_mutex);
1519 + dev_info(bq->dev, "driver unregistred\n");
1527 +static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1528 + { "bq2415x", BQUNKNOWN },
1529 + { "bq24150", BQ24150 },
1530 + { "bq24150a", BQ24150A },
1531 + { "bq24151", BQ24151 },
1532 + { "bq24151a", BQ24151A },
1533 + { "bq24152", BQ24152 },
1534 + { "bq24153", BQ24153 },
1535 + { "bq24153a", BQ24153A },
1536 + { "bq24155", BQ24155 },
1537 + { "bq24156", BQ24156 },
1538 + { "bq24156a", BQ24156A },
1539 + { "bq24158", BQ24158 },
1542 +MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1544 +static struct i2c_driver bq2415x_driver = {
1546 + .name = "bq2415x-charger",
1548 + .probe = bq2415x_probe,
1549 + .remove = bq2415x_remove,
1550 + .id_table = bq2415x_i2c_id_table,
1553 +static int __init bq2415x_init(void)
1555 + return i2c_add_driver(&bq2415x_driver);
1557 +module_init(bq2415x_init);
1559 +static void __exit bq2415x_exit(void)
1561 + i2c_del_driver(&bq2415x_driver);
1563 +module_exit(bq2415x_exit);
1565 +MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1566 +MODULE_DESCRIPTION("bq2415x charger driver");
1567 +MODULE_LICENSE("GPL");
1568 --- /dev/null 2012-04-29 08:55:34.366920721 +0200
1569 +++ kernel-power/include/linux/power/bq2415x_charger.h 2012-01-27 15:47:45.689585447 +0100
1572 + bq2415x_charger.h - bq2415x charger driver
1573 + Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
1575 + This program is free software; you can redistribute it and/or modify
1576 + it under the terms of the GNU General Public License as published by
1577 + the Free Software Foundation; either version 2 of the License, or
1578 + (at your option) any later version.
1580 + This program is distributed in the hope that it will be useful,
1581 + but WITHOUT ANY WARRANTY; without even the implied warranty of
1582 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1583 + GNU General Public License for more details.
1585 + You should have received a copy of the GNU General Public License along
1586 + with this program; if not, write to the Free Software Foundation, Inc.,
1587 + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1590 +#ifndef BQ2415X_CHARGER_H
1591 +#define BQ2415X_CHARGER_H
1594 + This is platform data for bq2415x chip. It contains default board volatages
1595 + and currents which can be also later configured via sysfs. If value is -1
1596 + then default chip value (specified in datasheet) will be used.
1598 + Value resistor_sense is needed for for configuring charge and termination
1599 + current. It it is less or equal to zero, configuring charge and termination
1600 + current will not be possible.
1602 + Function set_charger_type_hook is needed for automode (setting correct
1603 + current limit when charger is connected/disconnected). When is NULL,
1604 + automode function is disabled. When is not NULL, it must have this prototype:
1606 + int (*set_charger_type_hook)(void (*hook)(int type, void *data), void *data)
1608 + and bq2415x driver will call it as:
1610 + platform_data->set_charger_type_hook(bq_hook_function, bq_private_data);
1612 + Board/platform function set_charger_type_hook return non zero when hook
1613 + function was successfull registred. Platform code should call that hook
1614 + function (which get from pointer, with data) every time when charger was
1615 + connected/disconnected. bq driver then set correct current limit.
1617 + Hook function has this prototype:
1619 + void hook(int type, void *data);
1622 + 0 - for unknown or none charger (max current limit is 100mA)
1623 + 1 - for usb host/hub charger (max current limit is 500mA)
1624 + 2 - for dedicated charger (unlimited)
1626 + data is pointer to bq_private_data (which get from set_charger_type_hook)
1628 + When bq driver is being unloaded, it call function:
1630 + platform_data->set_charger_type_hook(NULL, NULL);
1632 + After thet board/platform code must not call bq hook function! It is
1633 + possible that pointer to hook function will not be valid.
1637 +struct bq2415x_platform_data {
1638 + int current_limit; /* mA */
1639 + int weak_battery_voltage; /* mV */
1640 + int battery_regulation_voltage; /* mV */
1641 + int charge_current; /* mA */
1642 + int termination_current; /* mA */
1643 + int resistor_sense; /* m ohm */
1644 + int (*set_charger_type_hook)(void (*hook)(int type, void *data),
1649 --- kernel-power/drivers/power/Makefile.orig 2012-04-29 18:03:10.751810073 +0200
1650 +++ kernel-power/drivers/power/Makefile 2012-04-29 18:03:52.207808860 +0200
1651 @@ -25,3 +25,4 @@ obj-$(CONFIG_TWL4030_BCI_BATTERY) += twl
1652 obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
1653 obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
1654 obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
1655 +obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
1656 --- kernel-power/drivers/power/Kconfig.orig 2012-04-29 18:01:48.819812466 +0200
1657 +++ kernel-power/drivers/power/Kconfig 2012-04-29 18:03:06.043810209 +0200
1658 @@ -75,4 +75,10 @@ config BATTERY_BQ27x00
1660 Say Y here to enable support for batteries with BQ27200(I2C) chip.
1662 +config CHARGER_BQ2415X
1663 + tristate "BQ2415X charger driver"
1666 + Say Y here to enable support for chargers with BQ2415X(I2C) chip.
1668 endif # POWER_SUPPLY