2 +++ kernel-power/drivers/power/bq2415x_charger.c
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/kernel.h>
35 +#include <linux/module.h>
36 +#include <linux/param.h>
37 +#include <linux/err.h>
38 +#include <linux/workqueue.h>
39 +#include <linux/sysfs.h>
40 +#include <linux/platform_device.h>
41 +#include <linux/power_supply.h>
42 +#include <linux/idr.h>
43 +#include <linux/i2c.h>
44 +#include <linux/slab.h>
46 +#include <linux/power/bq2415x_charger.h>
48 +#define BQ2415X_TIMER_TIMEOUT 10
50 +#define BQ2415X_REG_STATUS 0x00
51 +#define BQ2415X_REG_CONTROL 0x01
52 +#define BQ2415X_REG_VOLTAGE 0x02
53 +#define BQ2415X_REG_VENDER 0x03
54 +#define BQ2415X_REG_CURRENT 0x04
56 +/* reset state for all registers */
57 +#define BQ2415X_RESET_STATUS BIT(6)
58 +#define BQ2415X_RESET_CONTROL (BIT(4)|BIT(5))
59 +#define BQ2415X_RESET_VOLTAGE (BIT(1)|BIT(3))
60 +#define BQ2415X_RESET_CURRENT (BIT(0)|BIT(3)|BIT(7))
62 +/* status register */
63 +#define BQ2415X_BIT_TMR_RST 7
64 +#define BQ2415X_BIT_OTG 7
65 +#define BQ2415X_BIT_EN_STAT 6
66 +#define BQ2415X_MASK_STAT (BIT(4)|BIT(5))
67 +#define BQ2415X_SHIFT_STAT 4
68 +#define BQ2415X_BIT_BOOST 3
69 +#define BQ2415X_MASK_FAULT (BIT(0)|BIT(1)|BIT(2))
70 +#define BQ2415X_SHIFT_FAULT 0
72 +/* control register */
73 +#define BQ2415X_MASK_LIMIT (BIT(6)|BIT(7))
74 +#define BQ2415X_SHIFT_LIMIT 6
75 +#define BQ2415X_MASK_VLOWV (BIT(4)|BIT(5))
76 +#define BQ2415X_SHIFT_VLOWV 4
77 +#define BQ2415X_BIT_TE 3
78 +#define BQ2415X_BIT_CE 2
79 +#define BQ2415X_BIT_HZ_MODE 1
80 +#define BQ2415X_BIT_OPA_MODE 0
82 +/* voltage register */
83 +#define BQ2415X_MASK_VO (BIT(2)|BIT(3)|BIT(4)|BIT(5)|BIT(6)|BIT(7))
84 +#define BQ2415X_SHIFT_VO 2
85 +#define BQ2415X_BIT_OTG_PL 1
86 +#define BQ2415X_BIT_OTG_EN 0
88 +/* vender register */
89 +#define BQ2415X_MASK_VENDER (BIT(5)|BIT(6)|BIT(7))
90 +#define BQ2415X_SHIFT_VENDER 5
91 +#define BQ2415X_MASK_PN (BIT(3)|BIT(4))
92 +#define BQ2415X_SHIFT_PN 3
93 +#define BQ2415X_MASK_REVISION (BIT(0)|BIT(1)|BIT(2))
94 +#define BQ2415X_SHIFT_REVISION 0
96 +/* current register */
98 +#define BQ2415X_MASK_VI_CHRG (BIT(4)|BIT(5)|BIT(6)|BIT(7))
99 +#define BQ2415X_SHIFT_VI_CHRG 4
101 +#define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2)|BIT(7))
102 +#define BQ2415X_SHIFT_VI_TERM 0
105 +enum bq2415x_command {
106 + BQ2415X_TIMER_RESET,
107 + BQ2415X_OTG_STATUS,
108 + BQ2415X_STAT_PIN_STATUS,
109 + BQ2415X_STAT_PIN_ENABLE,
110 + BQ2415X_STAT_PIN_DISABLE,
111 + BQ2415X_CHARGE_STATUS,
112 + BQ2415X_BOOST_STATUS,
113 + BQ2415X_FAULT_STATUS,
115 + BQ2415X_CHARGE_TERMINATION_STATUS,
116 + BQ2415X_CHARGE_TERMINATION_ENABLE,
117 + BQ2415X_CHARGE_TERMINATION_DISABLE,
118 + BQ2415X_CHARGER_STATUS,
119 + BQ2415X_CHARGER_ENABLE,
120 + BQ2415X_CHARGER_DISABLE,
121 + BQ2415X_HIGH_IMPEDANCE_STATUS,
122 + BQ2415X_HIGH_IMPEDANCE_ENABLE,
123 + BQ2415X_HIGH_IMPEDANCE_DISABLE,
124 + BQ2415X_BOOST_MODE_STATUS,
125 + BQ2415X_BOOST_MODE_ENABLE,
126 + BQ2415X_BOOST_MODE_DISABLE,
129 + BQ2415X_OTG_ACTIVATE_HIGH,
130 + BQ2415X_OTG_ACTIVATE_LOW,
131 + BQ2415X_OTG_PIN_STATUS,
132 + BQ2415X_OTG_PIN_ENABLE,
133 + BQ2415X_OTG_PIN_DISABLE,
135 + BQ2415X_VENDER_CODE,
136 + BQ2415X_PART_NUMBER,
155 +static char *bq2415x_chip_name[] = {
170 +struct bq2415x_device {
171 + struct device *dev;
172 + struct bq2415x_platform_data init_data;
173 + struct power_supply charger;
174 + struct delayed_work work;
175 + enum bq2415x_mode reported_mode;/* mode reported by hook function */
176 + enum bq2415x_mode mode; /* current configured mode */
177 + enum bq2415x_chip chip;
180 + int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
181 + int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
185 +static DEFINE_IDR(bq2415x_id);
187 +static DEFINE_MUTEX(bq2415x_id_mutex);
188 +static DEFINE_MUTEX(bq2415x_timer_mutex);
189 +static DEFINE_MUTEX(bq2415x_i2c_mutex);
191 +/* i2c read functions */
193 +static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
195 + struct i2c_client *client = to_i2c_client(bq->dev);
196 + struct i2c_msg msg[2];
200 + if (!client->adapter)
203 + msg[0].addr = client->addr;
206 + msg[0].len = sizeof(reg);
207 + msg[1].addr = client->addr;
208 + msg[1].flags = I2C_M_RD;
210 + msg[1].len = sizeof(val);
212 + mutex_lock(&bq2415x_i2c_mutex);
213 + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
214 + mutex_unlock(&bq2415x_i2c_mutex);
222 +static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
230 + ret = bq2415x_i2c_read(bq, reg);
234 + return (ret & mask) >> shift;
237 +static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
242 + return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
245 +/* i2c write functions */
247 +static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
249 + struct i2c_client *client = to_i2c_client(bq->dev);
250 + struct i2c_msg msg[1];
257 + msg[0].addr = client->addr;
260 + msg[0].len = ARRAY_SIZE(data);
262 + mutex_lock(&bq2415x_i2c_mutex);
263 + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
264 + mutex_unlock(&bq2415x_i2c_mutex);
266 + /* i2c_transfer returns number of messages transferred */
275 +static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
283 + ret = bq2415x_i2c_read(bq, reg);
288 + ret |= val << shift;
290 + return bq2415x_i2c_write(bq, reg, ret);
293 +static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
299 + return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
302 +/* global exec command function */
304 +static int bq2415x_exec_command(struct bq2415x_device *bq,
305 + enum bq2415x_command command)
309 + case BQ2415X_TIMER_RESET:
310 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS,
311 + 1, BQ2415X_BIT_TMR_RST);
312 + case BQ2415X_OTG_STATUS:
313 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
315 + case BQ2415X_STAT_PIN_STATUS:
316 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
317 + BQ2415X_BIT_EN_STAT);
318 + case BQ2415X_STAT_PIN_ENABLE:
319 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 1,
320 + BQ2415X_BIT_EN_STAT);
321 + case BQ2415X_STAT_PIN_DISABLE:
322 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_STATUS, 0,
323 + BQ2415X_BIT_EN_STAT);
324 + case BQ2415X_CHARGE_STATUS:
325 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
326 + BQ2415X_MASK_STAT, BQ2415X_SHIFT_STAT);
327 + case BQ2415X_BOOST_STATUS:
328 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_STATUS,
329 + BQ2415X_BIT_BOOST);
330 + case BQ2415X_FAULT_STATUS:
331 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
332 + BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
334 + case BQ2415X_CHARGE_TERMINATION_STATUS:
335 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
337 + case BQ2415X_CHARGE_TERMINATION_ENABLE:
338 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
339 + 1, BQ2415X_BIT_TE);
340 + case BQ2415X_CHARGE_TERMINATION_DISABLE:
341 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
342 + 0, BQ2415X_BIT_TE);
343 + case BQ2415X_CHARGER_STATUS:
344 + ret = bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
349 + return ret > 0 ? 0 : 1;
350 + case BQ2415X_CHARGER_ENABLE:
351 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
352 + 0, BQ2415X_BIT_CE);
353 + case BQ2415X_CHARGER_DISABLE:
354 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
355 + 1, BQ2415X_BIT_CE);
356 + case BQ2415X_HIGH_IMPEDANCE_STATUS:
357 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
358 + BQ2415X_BIT_HZ_MODE);
359 + case BQ2415X_HIGH_IMPEDANCE_ENABLE:
360 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
361 + 1, BQ2415X_BIT_HZ_MODE);
362 + case BQ2415X_HIGH_IMPEDANCE_DISABLE:
363 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
364 + 0, BQ2415X_BIT_HZ_MODE);
365 + case BQ2415X_BOOST_MODE_STATUS:
366 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
367 + BQ2415X_BIT_OPA_MODE);
368 + case BQ2415X_BOOST_MODE_ENABLE:
369 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
370 + 1, BQ2415X_BIT_OPA_MODE);
371 + case BQ2415X_BOOST_MODE_DISABLE:
372 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
373 + 0, BQ2415X_BIT_OPA_MODE);
375 + case BQ2415X_OTG_LEVEL:
376 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
377 + BQ2415X_BIT_OTG_PL);
378 + case BQ2415X_OTG_ACTIVATE_HIGH:
379 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
380 + 1, BQ2415X_BIT_OTG_PL);
381 + case BQ2415X_OTG_ACTIVATE_LOW:
382 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
383 + 0, BQ2415X_BIT_OTG_PL);
384 + case BQ2415X_OTG_PIN_STATUS:
385 + return bq2415x_i2c_read_bit(bq, BQ2415X_REG_VOLTAGE,
386 + BQ2415X_BIT_OTG_EN);
387 + case BQ2415X_OTG_PIN_ENABLE:
388 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
389 + 1, BQ2415X_BIT_OTG_EN);
390 + case BQ2415X_OTG_PIN_DISABLE:
391 + return bq2415x_i2c_write_bit(bq, BQ2415X_REG_VOLTAGE,
392 + 0, BQ2415X_BIT_OTG_EN);
394 + case BQ2415X_VENDER_CODE:
395 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
396 + BQ2415X_MASK_VENDER, BQ2415X_SHIFT_VENDER);
397 + case BQ2415X_PART_NUMBER:
398 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
399 + BQ2415X_MASK_PN, BQ2415X_SHIFT_PN);
400 + case BQ2415X_REVISION:
401 + return bq2415x_i2c_read_mask(bq, BQ2415X_REG_VENDER,
402 + BQ2415X_MASK_REVISION, BQ2415X_SHIFT_REVISION);
409 +/* global detect chip */
411 +static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
413 + struct i2c_client *client = to_i2c_client(bq->dev);
414 + int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
419 + switch (client->addr) {
423 + if (bq->chip == BQ24151A)
428 + if (bq->chip == BQ24150A ||
429 + bq->chip == BQ24152 ||
430 + bq->chip == BQ24155)
435 + if (bq->chip == BQ24153A)
447 + if (bq->chip == BQ24156A)
462 +static int bq2415x_detect_revision(struct bq2415x_device *bq)
464 + int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
465 + int chip = bq2415x_detect_chip(bq);
466 + if (ret < 0 || chip < 0)
475 + if (ret >= 0 && ret <= 3)
505 +static int bq2415x_get_vender_code(struct bq2415x_device *bq)
507 + int ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
510 + else /* convert to binary */
511 + return (ret & 0x1) +
512 + ((ret >> 1) & 0x1) * 10 +
513 + ((ret >> 2) & 0x1) * 100;
516 +/* global other functions */
518 +static void bq2415x_reset_chip(struct bq2415x_device *bq)
520 + bq2415x_i2c_write(bq, BQ2415X_REG_CURRENT, BQ2415X_RESET_CURRENT);
521 + bq2415x_i2c_write(bq, BQ2415X_REG_VOLTAGE, BQ2415X_RESET_VOLTAGE);
522 + bq2415x_i2c_write(bq, BQ2415X_REG_CONTROL, BQ2415X_RESET_CONTROL);
523 + bq2415x_i2c_write(bq, BQ2415X_REG_STATUS, BQ2415X_RESET_STATUS);
526 +static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
531 + else if (mA <= 500)
533 + else if (mA <= 800)
537 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
538 + BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
541 +static int bq2415x_get_current_limit(struct bq2415x_device *bq)
543 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
544 + BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
559 +static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
561 + /* round to 100mV */
563 + if (mV <= 3400 + 50)
565 + else if (mV <= 3500 + 50)
567 + else if (mV <= 3600 + 50)
571 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
572 + BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
575 +static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
577 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
578 + BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
582 + return 100 * (34 + ret);
585 +static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
588 + int val = (mV/10 - 350) / 2;
592 + else if (val > 94) /* FIXME: Max is 94 or 122 ? Set max value ? */
595 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
596 + BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
599 +static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
601 + int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
602 + BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
606 + return 10 * (350 + 2*ret);
609 +static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
612 + if (bq->init_data.resistor_sense <= 0)
615 + val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
622 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
623 + BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
626 +static int bq2415x_get_charge_current(struct bq2415x_device *bq)
629 + if (bq->init_data.resistor_sense <= 0)
632 + ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
633 + BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
637 + return (37400 + 6800*ret) / bq->init_data.resistor_sense;
640 +static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
643 + if (bq->init_data.resistor_sense <= 0)
646 + val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
653 + return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
654 + BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
657 +static int bq2415x_get_termination_current(struct bq2415x_device *bq)
660 + if (bq->init_data.resistor_sense <= 0)
663 + ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
664 + BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
668 + return (3400 + 3400*ret) / bq->init_data.resistor_sense;
671 +#define bq2415x_set_default_value(bq, value) \
674 + if (bq->init_data.value != -1) \
675 + ret = bq2415x_set_##value(bq, bq->init_data.value); \
680 +static int bq2415x_set_defaults(struct bq2415x_device *bq)
682 + bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
683 + bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
684 + bq2415x_set_default_value(bq, current_limit);
685 + bq2415x_set_default_value(bq, weak_battery_voltage);
686 + bq2415x_set_default_value(bq, battery_regulation_voltage);
687 + if (bq->init_data.resistor_sense > 0) {
688 + bq2415x_set_default_value(bq, charge_current);
689 + bq2415x_set_default_value(bq, termination_current);
690 + bq2415x_exec_command(bq, BQ2415X_CHARGE_TERMINATION_ENABLE);
692 + bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
696 +#undef bq2415x_set_default_value
698 +/* charger mode functions */
700 +static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
705 + if (mode == BQ2415X_MODE_NONE ||
706 + mode == BQ2415X_MODE_HOST_CHARGER ||
707 + mode == BQ2415X_MODE_DEDICATED_CHARGER)
711 + ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
713 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
719 + case BQ2415X_MODE_NONE:
720 + dev_dbg(bq->dev, "changing mode to: N/A\n");
721 + ret = bq2415x_set_current_limit(bq, 100);
723 + case BQ2415X_MODE_HOST_CHARGER:
724 + dev_dbg(bq->dev, "changing mode to: Host/HUB charger\n");
725 + ret = bq2415x_set_current_limit(bq, 500);
727 + case BQ2415X_MODE_DEDICATED_CHARGER:
728 + dev_dbg(bq->dev, "changing mode to: Dedicated charger\n");
729 + ret = bq2415x_set_current_limit(bq, 1800);
731 + case BQ2415X_MODE_BOOST: /* Boost mode */
732 + dev_dbg(bq->dev, "changing mode to: Boost\n");
733 + ret = bq2415x_set_current_limit(bq, 100);
741 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
743 + ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
749 + sysfs_notify(&bq->charger.dev->kobj, NULL, "mode");
755 +static void bq2415x_hook_function(enum bq2415x_mode mode, void *data)
757 + struct bq2415x_device *bq = data;
762 + dev_dbg(bq->dev, "hook function was called\n");
764 + bq->reported_mode = mode;
765 + sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode");
767 + if (bq->automode < 1)
770 + bq2415x_set_mode(bq, bq->reported_mode);
774 +/* timer functions */
776 +static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
778 + mutex_lock(&bq2415x_timer_mutex);
780 + if (bq->autotimer == state) {
781 + mutex_unlock(&bq2415x_timer_mutex);
785 + bq->autotimer = state;
788 + schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
789 + bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
791 + cancel_delayed_work_sync(&bq->work);
794 + mutex_unlock(&bq2415x_timer_mutex);
797 +static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
799 + dev_err(bq->dev, "%s\n", msg);
800 + if (bq->automode > 0)
802 + bq2415x_set_mode(bq, BQ2415X_MODE_NONE);
803 + bq2415x_set_autotimer(bq, 0);
806 +static void bq2415x_timer_work(struct work_struct *work)
808 + struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
810 + int ret, error, boost;
812 + if (!bq->autotimer)
815 + ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
817 + bq2415x_timer_error(bq, "Reseting timer failed");
821 + boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
823 + bq2415x_timer_error(bq, "Unknown error");
827 + error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
829 + bq2415x_timer_error(bq, "Unknown error");
835 + case 0: /* No error */
837 + case 6: /* Timer expired */
838 + dev_err(bq->dev, "Timer expired\n");
840 + case 3: /* Battery voltage too low */
841 + dev_err(bq->dev, "Battery voltage to low\n");
844 + case 1: /* Overvoltage protection (chip fried) */
845 + bq2415x_timer_error(bq,
846 + "Overvolatge protection (chip fried)");
848 + case 2: /* Overload */
849 + bq2415x_timer_error(bq, "Overload");
851 + case 4: /* Battery overvoltage protection */
852 + bq2415x_timer_error(bq,
853 + "Battery overvoltage protection");
855 + case 5: /* Thermal shutdown (too hot) */
856 + bq2415x_timer_error(bq,
857 + "Thermal shutdown (too hot)");
860 + bq2415x_timer_error(bq, "Unknown error");
865 + case 0: /* No error */
867 + case 2: /* Sleep mode */
868 + dev_err(bq->dev, "Sleep mode\n");
870 + case 3: /* Poor input source */
871 + dev_err(bq->dev, "Poor input source\n");
873 + case 6: /* Timer expired */
874 + dev_err(bq->dev, "Timer expired\n");
876 + case 7: /* No battery */
877 + dev_err(bq->dev, "No battery\n");
880 + case 1: /* Overvoltage protection (chip fried) */
881 + bq2415x_timer_error(bq,
882 + "Overvolatge protection (chip fried)");
884 + case 4: /* Battery overvoltage protection */
885 + bq2415x_timer_error(bq,
886 + "Battery overvoltage protection");
888 + case 5: /* Thermal shutdown (too hot) */
889 + bq2415x_timer_error(bq,
890 + "Thermal shutdown (too hot)");
895 + schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
900 +static enum power_supply_property bq2415x_power_supply_props[] = {
901 + /* TODO: more power supply properties */
902 + POWER_SUPPLY_PROP_STATUS,
903 + POWER_SUPPLY_PROP_MODEL_NAME,
906 +static int bq2415x_power_supply_get_property(struct power_supply *psy,
907 + enum power_supply_property psp, union power_supply_propval *val)
909 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
914 + case POWER_SUPPLY_PROP_STATUS:
915 + ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
918 + else if (ret == 0) /* Ready */
919 + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
920 + else if (ret == 1) /* Charge in progress */
921 + val->intval = POWER_SUPPLY_STATUS_CHARGING;
922 + else if (ret == 2) /* Charge done */
923 + val->intval = POWER_SUPPLY_STATUS_FULL;
925 + val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
927 + case POWER_SUPPLY_PROP_MODEL_NAME:
928 + val->strval = bq->model;
936 +static int bq2415x_power_supply_init(struct bq2415x_device *bq)
942 + bq->charger.name = bq->name;
943 + bq->charger.type = POWER_SUPPLY_TYPE_USB;
944 + bq->charger.properties = bq2415x_power_supply_props;
945 + bq->charger.num_properties = ARRAY_SIZE(bq2415x_power_supply_props);
946 + bq->charger.get_property = bq2415x_power_supply_get_property;
948 + ret = bq2415x_detect_chip(bq);
954 + ret = bq2415x_detect_revision(bq);
956 + strcpy(revstr, "unknown");
958 + sprintf(revstr, "1.%d", ret);
960 + bq->model = kasprintf(GFP_KERNEL,
961 + "chip %s, revision %s, vender code %.3d",
962 + bq2415x_chip_name[chip], revstr,
963 + bq2415x_get_vender_code(bq));
965 + dev_err(bq->dev, "failed to allocate model name\n");
969 + ret = power_supply_register(bq->dev, &bq->charger);
978 +static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
981 + if (bq->automode > 0)
983 + cancel_delayed_work_sync(&bq->work);
984 + power_supply_unregister(&bq->charger);
990 +static ssize_t bq2415x_sysfs_show_status(struct device *dev,
991 + struct device_attribute *attr, char *buf)
993 + struct power_supply *psy = dev_get_drvdata(dev);
994 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
996 + enum bq2415x_command command;
999 + if (strcmp(attr->attr.name, "otg_status") == 0)
1000 + command = BQ2415X_OTG_STATUS;
1001 + else if (strcmp(attr->attr.name, "charge_status") == 0)
1002 + command = BQ2415X_CHARGE_STATUS;
1003 + else if (strcmp(attr->attr.name, "boost_status") == 0)
1004 + command = BQ2415X_BOOST_STATUS;
1005 + else if (strcmp(attr->attr.name, "fault_status") == 0)
1006 + command = BQ2415X_FAULT_STATUS;
1010 + ret = bq2415x_exec_command(bq, command);
1014 + return sprintf(buf, "%d\n", ret);
1017 +static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1018 + struct device_attribute *attr, const char *buf, size_t count)
1020 + struct power_supply *psy = dev_get_drvdata(dev);
1021 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1025 + if (strncmp(buf, "auto", 4) == 0)
1026 + bq2415x_set_autotimer(bq, 1);
1027 + else if (strncmp(buf, "off", 3) == 0)
1028 + bq2415x_set_autotimer(bq, 0);
1030 + ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1038 +static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1039 + struct device_attribute *attr, char *buf)
1041 + struct power_supply *psy = dev_get_drvdata(dev);
1042 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1045 + if (bq->autotimer)
1046 + return sprintf(buf, "auto\n");
1048 + return sprintf(buf, "off\n");
1051 +static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1052 + struct device_attribute *attr, const char *buf, size_t count)
1054 + struct power_supply *psy = dev_get_drvdata(dev);
1055 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1057 + enum bq2415x_mode mode;
1060 + if (strncmp(buf, "auto", 4) == 0) {
1061 + if (bq->automode < 0)
1064 + mode = bq->reported_mode;
1065 + } else if (strncmp(buf, "none", 4) == 0) {
1066 + if (bq->automode > 0)
1068 + mode = BQ2415X_MODE_NONE;
1069 + } else if (strncmp(buf, "host", 4) == 0) {
1070 + if (bq->automode > 0)
1072 + mode = BQ2415X_MODE_HOST_CHARGER;
1073 + } else if (strncmp(buf, "dedicated", 9) == 0) {
1074 + if (bq->automode > 0)
1076 + mode = BQ2415X_MODE_DEDICATED_CHARGER;
1077 + } else if (strncmp(buf, "boost", 5) == 0) {
1078 + if (bq->automode > 0)
1080 + mode = BQ2415X_MODE_BOOST;
1081 + } else if (strncmp(buf, "reset", 5) == 0) {
1082 + bq2415x_reset_chip(bq);
1083 + bq2415x_set_defaults(bq);
1084 + if (bq->automode > 0)
1090 + ret = bq2415x_set_mode(bq, mode);
1097 +static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1098 + struct device_attribute *attr, char *buf)
1100 + struct power_supply *psy = dev_get_drvdata(dev);
1101 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1105 + if (bq->automode > 0)
1106 + ret += sprintf(buf+ret, "auto (");
1108 + switch (bq->mode) {
1109 + case BQ2415X_MODE_NONE:
1110 + ret += sprintf(buf+ret, "none");
1112 + case BQ2415X_MODE_HOST_CHARGER:
1113 + ret += sprintf(buf+ret, "host");
1115 + case BQ2415X_MODE_DEDICATED_CHARGER:
1116 + ret += sprintf(buf+ret, "dedicated");
1118 + case BQ2415X_MODE_BOOST:
1119 + ret += sprintf(buf+ret, "boost");
1123 + if (bq->automode > 0)
1124 + ret += sprintf(buf+ret, ")");
1126 + ret += sprintf(buf+ret, "\n");
1130 +static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
1131 + struct device_attribute *attr, char *buf)
1133 + struct power_supply *psy = dev_get_drvdata(dev);
1134 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1137 + switch (bq->reported_mode) {
1138 + case BQ2415X_MODE_NONE:
1139 + return sprintf(buf, "none\n");
1140 + case BQ2415X_MODE_HOST_CHARGER:
1141 + return sprintf(buf, "host\n");
1142 + case BQ2415X_MODE_DEDICATED_CHARGER:
1143 + return sprintf(buf, "dedicated\n");
1144 + case BQ2415X_MODE_BOOST:
1145 + return sprintf(buf, "boost\n");
1151 +static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1152 + struct device_attribute *attr, const char *buf, size_t count)
1154 + struct power_supply *psy = dev_get_drvdata(dev);
1155 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1161 + if (sscanf(buf, "%x %x", ®, &val) != 2)
1164 + if (reg > 4 || val > 255)
1167 + ret = bq2415x_i2c_write(bq, reg, val);
1174 +static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1175 + u8 reg, char *buf)
1177 + int ret = bq2415x_i2c_read(bq, reg);
1179 + return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1181 + return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1184 +static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1185 + struct device_attribute *attr, char *buf)
1187 + struct power_supply *psy = dev_get_drvdata(dev);
1188 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1192 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_STATUS, buf+ret);
1193 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CONTROL, buf+ret);
1194 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VOLTAGE, buf+ret);
1195 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_VENDER, buf+ret);
1196 + ret += bq2415x_sysfs_print_reg(bq, BQ2415X_REG_CURRENT, buf+ret);
1200 +/* Current & Volatage settings */
1202 +static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1203 + struct device_attribute *attr, const char *buf, size_t count)
1205 + struct power_supply *psy = dev_get_drvdata(dev);
1206 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1211 + if (kstrtol(buf, 10, &val) < 0)
1214 + if (strcmp(attr->attr.name, "current_limit") == 0)
1215 + ret = bq2415x_set_current_limit(bq, val);
1216 + else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1217 + ret = bq2415x_set_weak_battery_voltage(bq, val);
1218 + else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1219 + ret = bq2415x_set_battery_regulation_voltage(bq, val);
1220 + else if (strcmp(attr->attr.name, "charge_current") == 0)
1221 + ret = bq2415x_set_charge_current(bq, val);
1222 + else if (strcmp(attr->attr.name, "termination_current") == 0)
1223 + ret = bq2415x_set_termination_current(bq, val);
1233 +static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1234 + struct device_attribute *attr, char *buf)
1236 + struct power_supply *psy = dev_get_drvdata(dev);
1237 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1241 + if (strcmp(attr->attr.name, "current_limit") == 0)
1242 + ret = bq2415x_get_current_limit(bq);
1243 + else if (strcmp(attr->attr.name, "weak_battery_voltage") == 0)
1244 + ret = bq2415x_get_weak_battery_voltage(bq);
1245 + else if (strcmp(attr->attr.name, "battery_regulation_voltage") == 0)
1246 + ret = bq2415x_get_battery_regulation_voltage(bq);
1247 + else if (strcmp(attr->attr.name, "charge_current") == 0)
1248 + ret = bq2415x_get_charge_current(bq);
1249 + else if (strcmp(attr->attr.name, "termination_current") == 0)
1250 + ret = bq2415x_get_termination_current(bq);
1257 + return sprintf(buf, "%d\n", ret);
1260 +static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1261 + struct device_attribute *attr, const char *buf, size_t count)
1263 + struct power_supply *psy = dev_get_drvdata(dev);
1264 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1266 + enum bq2415x_command command;
1270 + if (kstrtol(buf, 10, &val) < 0)
1273 + if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1274 + command = val ? BQ2415X_CHARGE_TERMINATION_ENABLE :
1275 + BQ2415X_CHARGE_TERMINATION_DISABLE;
1276 + else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1277 + command = val ? BQ2415X_HIGH_IMPEDANCE_ENABLE :
1278 + BQ2415X_HIGH_IMPEDANCE_DISABLE;
1279 + else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1280 + command = val ? BQ2415X_OTG_PIN_ENABLE :
1281 + BQ2415X_OTG_PIN_DISABLE;
1282 + else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1283 + command = val ? BQ2415X_STAT_PIN_ENABLE :
1284 + BQ2415X_STAT_PIN_DISABLE;
1288 + ret = bq2415x_exec_command(bq, command);
1295 +static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1296 + struct device_attribute *attr, char *buf)
1298 + struct power_supply *psy = dev_get_drvdata(dev);
1299 + struct bq2415x_device *bq = container_of(psy, struct bq2415x_device,
1301 + enum bq2415x_command command;
1304 + if (strcmp(attr->attr.name, "charge_termination_enable") == 0)
1305 + command = BQ2415X_CHARGE_TERMINATION_STATUS;
1306 + else if (strcmp(attr->attr.name, "high_impedance_enable") == 0)
1307 + command = BQ2415X_HIGH_IMPEDANCE_STATUS;
1308 + else if (strcmp(attr->attr.name, "otg_pin_enable") == 0)
1309 + command = BQ2415X_OTG_PIN_STATUS;
1310 + else if (strcmp(attr->attr.name, "stat_pin_enable") == 0)
1311 + command = BQ2415X_STAT_PIN_STATUS;
1315 + ret = bq2415x_exec_command(bq, command);
1319 + return sprintf(buf, "%d\n", ret);
1322 +static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1323 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1324 +static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1325 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1326 +static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1327 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1328 +static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1329 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1330 +static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1331 + bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1333 +static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1334 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1335 +static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1336 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1337 +static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1338 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1339 +static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1340 + bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1342 +static DEVICE_ATTR(reported_mode, S_IRUGO,
1343 + bq2415x_sysfs_show_reported_mode, NULL);
1344 +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1345 + bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1346 +static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1347 + bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1349 +static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1350 + bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1352 +static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1353 +static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1354 +static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1355 +static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1357 +static struct attribute *bq2415x_sysfs_attributes[] = {
1358 + &dev_attr_current_limit.attr,
1359 + &dev_attr_weak_battery_voltage.attr,
1360 + &dev_attr_battery_regulation_voltage.attr,
1361 + &dev_attr_charge_current.attr,
1362 + &dev_attr_termination_current.attr,
1364 + &dev_attr_charge_termination_enable.attr,
1365 + &dev_attr_high_impedance_enable.attr,
1366 + &dev_attr_otg_pin_enable.attr,
1367 + &dev_attr_stat_pin_enable.attr,
1369 + &dev_attr_reported_mode.attr,
1370 + &dev_attr_mode.attr,
1371 + &dev_attr_timer.attr,
1373 + &dev_attr_registers.attr,
1375 + &dev_attr_otg_status.attr,
1376 + &dev_attr_charge_status.attr,
1377 + &dev_attr_boost_status.attr,
1378 + &dev_attr_fault_status.attr,
1382 +static const struct attribute_group bq2415x_sysfs_attr_group = {
1383 + .attrs = bq2415x_sysfs_attributes,
1386 +static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1388 + return sysfs_create_group(&bq->charger.dev->kobj,
1389 + &bq2415x_sysfs_attr_group);
1392 +static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1394 + sysfs_remove_group(&bq->charger.dev->kobj, &bq2415x_sysfs_attr_group);
1397 +/* bq2415x register */
1399 +static int bq2415x_probe(struct i2c_client *client,
1400 + const struct i2c_device_id *id)
1405 + struct bq2415x_device *bq;
1407 + if (!client->dev.platform_data) {
1408 + dev_err(&client->dev, "platform data not set\n");
1412 + /* Get new ID for the new device */
1413 + ret = idr_pre_get(&bq2415x_id, GFP_KERNEL);
1417 + mutex_lock(&bq2415x_id_mutex);
1418 + ret = idr_get_new(&bq2415x_id, client, &num);
1419 + mutex_unlock(&bq2415x_id_mutex);
1424 + name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1426 + dev_err(&client->dev, "failed to allocate device name\n");
1431 + bq = kzalloc(sizeof(*bq), GFP_KERNEL);
1433 + dev_err(&client->dev, "failed to allocate device data\n");
1438 + i2c_set_clientdata(client, bq);
1441 + bq->dev = &client->dev;
1442 + bq->chip = id->driver_data;
1444 + bq->mode = BQ2415X_MODE_NONE;
1445 + bq->reported_mode = BQ2415X_MODE_NONE;
1446 + bq->autotimer = 0;
1449 + memcpy(&bq->init_data, client->dev.platform_data,
1450 + sizeof(bq->init_data));
1452 + bq2415x_reset_chip(bq);
1454 + ret = bq2415x_power_supply_init(bq);
1456 + dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1460 + ret = bq2415x_sysfs_init(bq);
1462 + dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1466 + ret = bq2415x_set_defaults(bq);
1468 + dev_err(bq->dev, "failed to set default values: %d\n", ret);
1472 + if (bq->init_data.set_mode_hook) {
1473 + if (bq->init_data.set_mode_hook(
1474 + bq2415x_hook_function, bq)) {
1476 + bq2415x_set_mode(bq, bq->reported_mode);
1477 + dev_info(bq->dev, "automode enabled\n");
1479 + bq->automode = -1;
1480 + dev_info(bq->dev, "automode failed\n");
1483 + bq->automode = -1;
1484 + dev_info(bq->dev, "automode not supported\n");
1487 + INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1488 + bq2415x_set_autotimer(bq, 1);
1490 + dev_info(bq->dev, "driver registred\n");
1494 + bq2415x_sysfs_exit(bq);
1496 + bq2415x_power_supply_exit(bq);
1502 + mutex_lock(&bq2415x_id_mutex);
1503 + idr_remove(&bq2415x_id, num);
1504 + mutex_unlock(&bq2415x_id_mutex);
1509 +/* bq2415x unregister */
1511 +static int bq2415x_remove(struct i2c_client *client)
1513 + struct bq2415x_device *bq = i2c_get_clientdata(client);
1515 + if (bq->init_data.set_mode_hook)
1516 + bq->init_data.set_mode_hook(NULL, NULL);
1518 + bq2415x_sysfs_exit(bq);
1519 + bq2415x_power_supply_exit(bq);
1521 + bq2415x_reset_chip(bq);
1523 + mutex_lock(&bq2415x_id_mutex);
1524 + idr_remove(&bq2415x_id, bq->id);
1525 + mutex_unlock(&bq2415x_id_mutex);
1527 + dev_info(bq->dev, "driver unregistred\n");
1535 +static const struct i2c_device_id bq2415x_i2c_id_table[] = {
1536 + { "bq2415x", BQUNKNOWN },
1537 + { "bq24150", BQ24150 },
1538 + { "bq24150a", BQ24150A },
1539 + { "bq24151", BQ24151 },
1540 + { "bq24151a", BQ24151A },
1541 + { "bq24152", BQ24152 },
1542 + { "bq24153", BQ24153 },
1543 + { "bq24153a", BQ24153A },
1544 + { "bq24155", BQ24155 },
1545 + { "bq24156", BQ24156 },
1546 + { "bq24156a", BQ24156A },
1547 + { "bq24158", BQ24158 },
1550 +MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1552 +static struct i2c_driver bq2415x_driver = {
1554 + .name = "bq2415x-charger",
1556 + .probe = bq2415x_probe,
1557 + .remove = bq2415x_remove,
1558 + .id_table = bq2415x_i2c_id_table,
1561 +static int __init bq2415x_init(void)
1563 + return i2c_add_driver(&bq2415x_driver);
1565 +module_init(bq2415x_init);
1567 +static void __exit bq2415x_exit(void)
1569 + i2c_del_driver(&bq2415x_driver);
1571 +module_exit(bq2415x_exit);
1573 +MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1574 +MODULE_DESCRIPTION("bq2415x charger driver");
1575 +MODULE_LICENSE("GPL");
1577 +++ kernel-power/include/linux/power/bq2415x_charger.h
1580 + bq2415x_charger.h - bq2415x charger driver
1581 + Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
1583 + This program is free software; you can redistribute it and/or modify
1584 + it under the terms of the GNU General Public License as published by
1585 + the Free Software Foundation; either version 2 of the License, or
1586 + (at your option) any later version.
1588 + This program is distributed in the hope that it will be useful,
1589 + but WITHOUT ANY WARRANTY; without even the implied warranty of
1590 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1591 + GNU General Public License for more details.
1593 + You should have received a copy of the GNU General Public License along
1594 + with this program; if not, write to the Free Software Foundation, Inc.,
1595 + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1598 +#ifndef BQ2415X_CHARGER_H
1599 +#define BQ2415X_CHARGER_H
1602 + This is platform data for bq2415x chip. It contains default board voltages
1603 + and currents which can be also later configured via sysfs. If value is -1
1604 + then default chip value (specified in datasheet) will be used.
1606 + Value resistor_sense is needed for for configuring charge and termination
1607 + current. It it is less or equal to zero, configuring charge and termination
1608 + current will not be possible.
1610 + Function set_mode_hook is needed for automode (setting correct current limit
1611 + when charger is connected/disconnected or setting boost mode). When is NULL,
1612 + automode function is disabled. When is not NULL, it must have this prototype:
1614 + int (*set_mode_hook)(
1615 + void (*hook)(enum bq2415x_mode mode, void *data),
1618 + hook is hook function (see below) and data is pointer to driver private data
1620 + bq2415x driver will call it as:
1622 + platform_data->set_mode_hook(bq2415x_hook_function, bq2415x_device);
1624 + Board/platform function set_mode_hook return non zero value when hook
1625 + function was successfull registred. Platform code should call that hook
1626 + function (which get from pointer, with data) every time when charger was
1627 + connected/disconnected or require to enable boost mode. bq2415x driver then
1628 + will set correct current limit, enable/disable charger or boost mode.
1630 + Hook function has this prototype:
1632 + void hook(enum bq2415x_mode mode, void *data);
1634 + mode is bq2415x mode (charger or boost)
1635 + data is pointer to driver private data (which get from set_charger_type_hook)
1637 + When bq driver is being unloaded, it call function:
1639 + platform_data->set_mode_hook(NULL, NULL);
1641 + (hook function and driver private data are NULL)
1643 + After thet board/platform code must not call driver hook function! It is
1644 + possible that pointer to hook function will not be valid and calling will
1645 + cause undefined result.
1649 +/* Supported modes with maximal current limit */
1650 +enum bq2415x_mode {
1651 + BQ2415X_MODE_NONE, /* unknown or no charger (100mA) */
1652 + BQ2415X_MODE_HOST_CHARGER, /* usb host/hub charger (500mA) */
1653 + BQ2415X_MODE_DEDICATED_CHARGER, /* dedicated charger (unlimited) */
1654 + BQ2415X_MODE_BOOST, /* boost mode (charging disabled) */
1657 +struct bq2415x_platform_data {
1658 + int current_limit; /* mA */
1659 + int weak_battery_voltage; /* mV */
1660 + int battery_regulation_voltage; /* mV */
1661 + int charge_current; /* mA */
1662 + int termination_current; /* mA */
1663 + int resistor_sense; /* m ohm */
1664 + int (*set_mode_hook)(void (*hook)(enum bq2415x_mode mode, void *data),