2 * bq2415x charger driver
4 * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com>
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.
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.
17 * http://www.ti.com/product/bq24150
18 * http://www.ti.com/product/bq24150a
19 * http://www.ti.com/product/bq24152
20 * http://www.ti.com/product/bq24153
21 * http://www.ti.com/product/bq24153a
22 * http://www.ti.com/product/bq24155
23 * http://www.ti.com/product/bq24157s
24 * http://www.ti.com/product/bq24158
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/param.h>
30 #include <linux/err.h>
31 #include <linux/workqueue.h>
32 #include <linux/sysfs.h>
33 #include <linux/platform_device.h>
34 #include <linux/power_supply.h>
35 #include <linux/idr.h>
36 #include <linux/i2c.h>
37 #include <linux/slab.h>
38 #include <linux/acpi.h>
40 #include <linux/power/bq2415x_charger.h>
42 /* timeout for resetting chip timer */
43 #define BQ2415X_TIMER_TIMEOUT 10
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
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))
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
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
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
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
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
96 #define BQ2415X_MASK_VI_TERM (BIT(0)|BIT(1)|BIT(2))
97 #define BQ2415X_SHIFT_VI_TERM 0
100 enum bq2415x_command {
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,
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,
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,
151 static char *bq2415x_chip_name[] = {
167 struct bq2415x_device {
169 struct bq2415x_platform_data init_data;
170 struct power_supply *charger;
171 struct power_supply_desc charger_desc;
172 struct delayed_work work;
173 struct power_supply *notify_psy;
174 struct notifier_block nb;
175 enum bq2415x_mode reported_mode;/* mode reported by hook function */
176 enum bq2415x_mode mode; /* currently configured mode */
177 enum bq2415x_chip chip;
178 const char *timer_error;
181 int autotimer; /* 1 - if driver automatically reset timer, 0 - not */
182 int automode; /* 1 - enabled, 0 - disabled; -1 - not supported */
186 /* each registered chip must have unique id */
187 static DEFINE_IDR(bq2415x_id);
189 static DEFINE_MUTEX(bq2415x_id_mutex);
190 static DEFINE_MUTEX(bq2415x_timer_mutex);
191 static DEFINE_MUTEX(bq2415x_i2c_mutex);
193 /**** i2c read functions ****/
195 /* read value from register */
196 static int bq2415x_i2c_read(struct bq2415x_device *bq, u8 reg)
198 struct i2c_client *client = to_i2c_client(bq->dev);
199 struct i2c_msg msg[2];
203 if (!client->adapter)
206 msg[0].addr = client->addr;
209 msg[0].len = sizeof(reg);
210 msg[1].addr = client->addr;
211 msg[1].flags = I2C_M_RD;
213 msg[1].len = sizeof(val);
215 mutex_lock(&bq2415x_i2c_mutex);
216 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
217 mutex_unlock(&bq2415x_i2c_mutex);
225 /* read value from register, apply mask and right shift it */
226 static int bq2415x_i2c_read_mask(struct bq2415x_device *bq, u8 reg,
234 ret = bq2415x_i2c_read(bq, reg);
237 return (ret & mask) >> shift;
240 /* read value from register and return one specified bit */
241 static int bq2415x_i2c_read_bit(struct bq2415x_device *bq, u8 reg, u8 bit)
245 return bq2415x_i2c_read_mask(bq, reg, BIT(bit), bit);
248 /**** i2c write functions ****/
250 /* write value to register */
251 static int bq2415x_i2c_write(struct bq2415x_device *bq, u8 reg, u8 val)
253 struct i2c_client *client = to_i2c_client(bq->dev);
254 struct i2c_msg msg[1];
261 msg[0].addr = client->addr;
264 msg[0].len = ARRAY_SIZE(data);
266 mutex_lock(&bq2415x_i2c_mutex);
267 ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
268 mutex_unlock(&bq2415x_i2c_mutex);
270 /* i2c_transfer returns number of messages transferred */
279 /* read value from register, change it with mask left shifted and write back */
280 static int bq2415x_i2c_write_mask(struct bq2415x_device *bq, u8 reg, u8 val,
288 ret = bq2415x_i2c_read(bq, reg);
295 return bq2415x_i2c_write(bq, reg, ret);
298 /* change only one bit in register */
299 static int bq2415x_i2c_write_bit(struct bq2415x_device *bq, u8 reg,
304 return bq2415x_i2c_write_mask(bq, reg, val, BIT(bit), bit);
307 /**** global functions ****/
309 /* exec command function */
310 static int bq2415x_exec_command(struct bq2415x_device *bq,
311 enum bq2415x_command 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,
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,
337 case BQ2415X_FAULT_STATUS:
338 return bq2415x_i2c_read_mask(bq, BQ2415X_REG_STATUS,
339 BQ2415X_MASK_FAULT, BQ2415X_SHIFT_FAULT);
341 case BQ2415X_CHARGE_TERMINATION_STATUS:
342 return bq2415x_i2c_read_bit(bq, BQ2415X_REG_CONTROL,
344 case BQ2415X_CHARGE_TERMINATION_ENABLE:
345 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
347 case BQ2415X_CHARGE_TERMINATION_DISABLE:
348 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
350 case BQ2415X_CHARGER_STATUS:
351 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,
359 case BQ2415X_CHARGER_DISABLE:
360 return bq2415x_i2c_write_bit(bq, BQ2415X_REG_CONTROL,
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,
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,
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);
413 /* detect chip type */
414 static enum bq2415x_chip bq2415x_detect_chip(struct bq2415x_device *bq)
416 struct i2c_client *client = to_i2c_client(bq->dev);
417 int ret = bq2415x_exec_command(bq, BQ2415X_PART_NUMBER);
422 switch (client->addr) {
426 if (bq->chip == BQ24151A)
430 if (bq->chip == BQ24150A ||
431 bq->chip == BQ24152 ||
436 if (bq->chip == BQ24153A)
447 if (bq->chip == BQ24156A)
451 if (bq->chip == BQ24157S)
463 /* detect chip revision */
464 static int bq2415x_detect_revision(struct bq2415x_device *bq)
466 int ret = bq2415x_exec_command(bq, BQ2415X_REVISION);
467 int chip = bq2415x_detect_chip(bq);
469 if (ret < 0 || chip < 0)
478 if (ret >= 0 && ret <= 3)
503 /* return chip vender code */
504 static int bq2415x_get_vender_code(struct bq2415x_device *bq)
508 ret = bq2415x_exec_command(bq, BQ2415X_VENDER_CODE);
512 /* convert to binary */
514 ((ret >> 1) & 0x1) * 10 +
515 ((ret >> 2) & 0x1) * 100;
518 /* reset all chip registers to default state */
519 static void bq2415x_reset_chip(struct bq2415x_device *bq)
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;
528 /**** properties functions ****/
530 /* set current limit in mA */
531 static int bq2415x_set_current_limit(struct bq2415x_device *bq, int mA)
544 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
545 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
548 /* get current limit in mA */
549 static int bq2415x_get_current_limit(struct bq2415x_device *bq)
553 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
554 BQ2415X_MASK_LIMIT, BQ2415X_SHIFT_LIMIT);
568 /* set weak battery voltage in mV */
569 static int bq2415x_set_weak_battery_voltage(struct bq2415x_device *bq, int mV)
576 else if (mV <= 3500 + 50)
578 else if (mV <= 3600 + 50)
583 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CONTROL, val,
584 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
587 /* get weak battery voltage in mV */
588 static int bq2415x_get_weak_battery_voltage(struct bq2415x_device *bq)
592 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CONTROL,
593 BQ2415X_MASK_VLOWV, BQ2415X_SHIFT_VLOWV);
596 return 100 * (34 + ret);
599 /* set battery regulation voltage in mV */
600 static int bq2415x_set_battery_regulation_voltage(struct bq2415x_device *bq,
603 int val = (mV/10 - 350) / 2;
606 * According to datasheet, maximum battery regulation voltage is
607 * 4440mV which is b101111 = 47.
614 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_VOLTAGE, val,
615 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
618 /* get battery regulation voltage in mV */
619 static int bq2415x_get_battery_regulation_voltage(struct bq2415x_device *bq)
621 int ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_VOLTAGE,
622 BQ2415X_MASK_VO, BQ2415X_SHIFT_VO);
626 return 10 * (350 + 2*ret);
629 /* set charge current in mA (platform data must provide resistor sense) */
630 static int bq2415x_set_charge_current(struct bq2415x_device *bq, int mA)
634 if (bq->init_data.resistor_sense <= 0)
637 val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
643 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
644 BQ2415X_MASK_VI_CHRG | BQ2415X_MASK_RESET,
645 BQ2415X_SHIFT_VI_CHRG);
648 /* get charge current in mA (platform data must provide resistor sense) */
649 static int bq2415x_get_charge_current(struct bq2415x_device *bq)
653 if (bq->init_data.resistor_sense <= 0)
656 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
657 BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
660 return (37400 + 6800*ret) / bq->init_data.resistor_sense;
663 /* set termination current in mA (platform data must provide resistor sense) */
664 static int bq2415x_set_termination_current(struct bq2415x_device *bq, int mA)
668 if (bq->init_data.resistor_sense <= 0)
671 val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
677 return bq2415x_i2c_write_mask(bq, BQ2415X_REG_CURRENT, val,
678 BQ2415X_MASK_VI_TERM | BQ2415X_MASK_RESET,
679 BQ2415X_SHIFT_VI_TERM);
682 /* get termination current in mA (platform data must provide resistor sense) */
683 static int bq2415x_get_termination_current(struct bq2415x_device *bq)
687 if (bq->init_data.resistor_sense <= 0)
690 ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
691 BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
694 return (3400 + 3400*ret) / bq->init_data.resistor_sense;
697 /* set default value of property */
698 #define bq2415x_set_default_value(bq, prop) \
701 if (bq->init_data.prop != -1) \
702 ret = bq2415x_set_##prop(bq, bq->init_data.prop); \
707 /* set default values of all properties */
708 static int bq2415x_set_defaults(struct bq2415x_device *bq)
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);
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);
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);
724 bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
728 /**** charger mode functions ****/
730 /* set charger mode */
731 static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
737 if (mode == BQ2415X_MODE_BOOST)
739 else if (mode != BQ2415X_MODE_OFF)
743 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_DISABLE);
746 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_DISABLE);
752 case BQ2415X_MODE_OFF:
753 dev_dbg(bq->dev, "changing mode to: Offline\n");
754 ret = bq2415x_set_current_limit(bq, 100);
756 case BQ2415X_MODE_NONE:
757 dev_dbg(bq->dev, "changing mode to: N/A\n");
758 ret = bq2415x_set_current_limit(bq, 100);
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);
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);
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);
778 ret = bq2415x_exec_command(bq, BQ2415X_CHARGER_ENABLE);
780 ret = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_ENABLE);
785 bq2415x_set_default_value(bq, weak_battery_voltage);
786 bq2415x_set_default_value(bq, battery_regulation_voltage);
789 sysfs_notify(&bq->charger->dev.kobj, NULL, "mode");
795 static int bq2415x_notifier_call(struct notifier_block *nb,
796 unsigned long val, void *v)
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;
806 if (val != PSY_EVENT_PROP_CHANGED)
809 if (psy != bq->notify_psy)
812 dev_dbg(bq->dev, "notifier call was called\n");
814 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX,
822 mode = BQ2415X_MODE_OFF;
824 mode = BQ2415X_MODE_NONE;
826 mode = BQ2415X_MODE_HOST_CHARGER;
828 mode = BQ2415X_MODE_DEDICATED_CHARGER;
830 if (bq->reported_mode == mode)
833 bq->reported_mode = mode;
835 /* if automode is not enabled do not tell about reported_mode */
836 if (bq->automode < 1)
839 schedule_delayed_work(&bq->work, 0);
844 /**** timer functions ****/
846 /* enable/disable auto resetting chip timer */
847 static void bq2415x_set_autotimer(struct bq2415x_device *bq, int state)
849 mutex_lock(&bq2415x_timer_mutex);
851 if (bq->autotimer == state) {
852 mutex_unlock(&bq2415x_timer_mutex);
856 bq->autotimer = state;
859 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
860 bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
861 bq->timer_error = NULL;
863 cancel_delayed_work_sync(&bq->work);
866 mutex_unlock(&bq2415x_timer_mutex);
869 /* called by bq2415x_timer_work on timer error */
870 static void bq2415x_timer_error(struct bq2415x_device *bq, const char *msg)
872 bq->timer_error = msg;
873 sysfs_notify(&bq->charger->dev.kobj, NULL, "timer");
874 dev_err(bq->dev, "%s\n", msg);
875 if (bq->automode > 0)
877 bq2415x_set_mode(bq, BQ2415X_MODE_OFF);
878 bq2415x_set_autotimer(bq, 0);
881 /* delayed work function for auto resetting chip timer */
882 static void bq2415x_timer_work(struct work_struct *work)
884 struct bq2415x_device *bq = container_of(work, struct bq2415x_device,
890 if (bq->automode > 0 && (bq->reported_mode != bq->mode)) {
891 sysfs_notify(&bq->charger->dev.kobj, NULL, "reported_mode");
892 bq2415x_set_mode(bq, bq->reported_mode);
898 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
900 bq2415x_timer_error(bq, "Resetting timer failed");
904 boost = bq2415x_exec_command(bq, BQ2415X_BOOST_MODE_STATUS);
906 bq2415x_timer_error(bq, "Unknown error");
910 error = bq2415x_exec_command(bq, BQ2415X_FAULT_STATUS);
912 bq2415x_timer_error(bq, "Unknown error");
918 /* Non fatal errors, chip is OK */
919 case 0: /* No error */
921 case 6: /* Timer expired */
922 dev_err(bq->dev, "Timer expired\n");
924 case 3: /* Battery voltage too low */
925 dev_err(bq->dev, "Battery voltage to low\n");
928 /* Fatal errors, disable and reset chip */
929 case 1: /* Overvoltage protection (chip fried) */
930 bq2415x_timer_error(bq,
931 "Overvoltage protection (chip fried)");
933 case 2: /* Overload */
934 bq2415x_timer_error(bq, "Overload");
936 case 4: /* Battery overvoltage protection */
937 bq2415x_timer_error(bq,
938 "Battery overvoltage protection");
940 case 5: /* Thermal shutdown (too hot) */
941 bq2415x_timer_error(bq,
942 "Thermal shutdown (too hot)");
945 bq2415x_timer_error(bq, "Unknown error");
950 /* Non fatal errors, chip is OK */
951 case 0: /* No error */
953 case 2: /* Sleep mode */
954 dev_err(bq->dev, "Sleep mode\n");
956 case 3: /* Poor input source */
957 dev_err(bq->dev, "Poor input source\n");
959 case 6: /* Timer expired */
960 dev_err(bq->dev, "Timer expired\n");
962 case 7: /* No battery */
963 dev_err(bq->dev, "No battery\n");
966 /* Fatal errors, disable and reset chip */
967 case 1: /* Overvoltage protection (chip fried) */
968 bq2415x_timer_error(bq,
969 "Overvoltage protection (chip fried)");
971 case 4: /* Battery overvoltage protection */
972 bq2415x_timer_error(bq,
973 "Battery overvoltage protection");
975 case 5: /* Thermal shutdown (too hot) */
976 bq2415x_timer_error(bq,
977 "Thermal shutdown (too hot)");
982 schedule_delayed_work(&bq->work, BQ2415X_TIMER_TIMEOUT * HZ);
985 /**** power supply interface code ****/
987 static 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,
993 static int bq2415x_power_supply_get_property(struct power_supply *psy,
994 enum power_supply_property psp,
995 union power_supply_propval *val)
997 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1001 case POWER_SUPPLY_PROP_STATUS:
1002 ret = bq2415x_exec_command(bq, BQ2415X_CHARGE_STATUS);
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;
1012 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
1014 case POWER_SUPPLY_PROP_MODEL_NAME:
1015 val->strval = bq->model;
1023 static int bq2415x_power_supply_init(struct bq2415x_device *bq)
1028 struct power_supply_config psy_cfg = { .drv_data = bq, };
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;
1037 ret = bq2415x_detect_chip(bq);
1043 ret = bq2415x_detect_revision(bq);
1045 strcpy(revstr, "unknown");
1047 sprintf(revstr, "1.%d", ret);
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));
1054 dev_err(bq->dev, "failed to allocate model name\n");
1058 bq->charger = power_supply_register(bq->dev, &bq->charger_desc,
1060 if (IS_ERR(bq->charger)) {
1062 return PTR_ERR(bq->charger);
1068 static void bq2415x_power_supply_exit(struct bq2415x_device *bq)
1071 if (bq->automode > 0)
1073 cancel_delayed_work_sync(&bq->work);
1074 power_supply_unregister(bq->charger);
1078 /**** additional sysfs entries for power supply interface ****/
1080 /* show *_status entries */
1081 static ssize_t bq2415x_sysfs_show_status(struct device *dev,
1082 struct device_attribute *attr,
1085 struct power_supply *psy = dev_get_drvdata(dev);
1086 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1087 enum bq2415x_command command;
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;
1101 ret = bq2415x_exec_command(bq, command);
1104 return sprintf(buf, "%d\n", ret);
1109 * auto - enable auto mode
1110 * off - disable auto mode
1111 * (other values) - reset chip timer
1113 static ssize_t bq2415x_sysfs_set_timer(struct device *dev,
1114 struct device_attribute *attr,
1118 struct power_supply *psy = dev_get_drvdata(dev);
1119 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
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);
1127 ret = bq2415x_exec_command(bq, BQ2415X_TIMER_RESET);
1134 /* show timer entry (auto or off) */
1135 static ssize_t bq2415x_sysfs_show_timer(struct device *dev,
1136 struct device_attribute *attr,
1139 struct power_supply *psy = dev_get_drvdata(dev);
1140 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1142 if (bq->timer_error)
1143 return sprintf(buf, "%s\n", bq->timer_error);
1146 return sprintf(buf, "auto\n");
1147 return sprintf(buf, "off\n");
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
1158 static ssize_t bq2415x_sysfs_set_mode(struct device *dev,
1159 struct device_attribute *attr,
1163 struct power_supply *psy = dev_get_drvdata(dev);
1164 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1165 enum bq2415x_mode mode;
1168 if (strncmp(buf, "auto", 4) == 0) {
1169 if (bq->automode < 0)
1172 mode = bq->reported_mode;
1173 } else if (strncmp(buf, "off", 3) == 0) {
1174 if (bq->automode > 0)
1176 mode = BQ2415X_MODE_OFF;
1177 } else if (strncmp(buf, "none", 4) == 0) {
1178 if (bq->automode > 0)
1180 mode = BQ2415X_MODE_NONE;
1181 } else if (strncmp(buf, "host", 4) == 0) {
1182 if (bq->automode > 0)
1184 mode = BQ2415X_MODE_HOST_CHARGER;
1185 } else if (strncmp(buf, "dedicated", 9) == 0) {
1186 if (bq->automode > 0)
1188 mode = BQ2415X_MODE_DEDICATED_CHARGER;
1189 } else if (strncmp(buf, "boost", 5) == 0) {
1190 if (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)
1199 mode = bq->reported_mode;
1204 ret = bq2415x_set_mode(bq, mode);
1210 /* show mode entry (auto, none, host, dedicated or boost) */
1211 static ssize_t bq2415x_sysfs_show_mode(struct device *dev,
1212 struct device_attribute *attr,
1215 struct power_supply *psy = dev_get_drvdata(dev);
1216 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1219 if (bq->automode > 0)
1220 ret += sprintf(buf+ret, "auto (");
1223 case BQ2415X_MODE_OFF:
1224 ret += sprintf(buf+ret, "off");
1226 case BQ2415X_MODE_NONE:
1227 ret += sprintf(buf+ret, "none");
1229 case BQ2415X_MODE_HOST_CHARGER:
1230 ret += sprintf(buf+ret, "host");
1232 case BQ2415X_MODE_DEDICATED_CHARGER:
1233 ret += sprintf(buf+ret, "dedicated");
1235 case BQ2415X_MODE_BOOST:
1236 ret += sprintf(buf+ret, "boost");
1240 if (bq->automode > 0)
1241 ret += sprintf(buf+ret, ")");
1243 ret += sprintf(buf+ret, "\n");
1247 /* show reported_mode entry (none, host, dedicated or boost) */
1248 static ssize_t bq2415x_sysfs_show_reported_mode(struct device *dev,
1249 struct device_attribute *attr,
1252 struct power_supply *psy = dev_get_drvdata(dev);
1253 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1255 if (bq->automode < 0)
1258 switch (bq->reported_mode) {
1259 case BQ2415X_MODE_OFF:
1260 return sprintf(buf, "off\n");
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");
1274 /* directly set raw value to chip register, format: 'register value' */
1275 static ssize_t bq2415x_sysfs_set_registers(struct device *dev,
1276 struct device_attribute *attr,
1280 struct power_supply *psy = dev_get_drvdata(dev);
1281 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1286 if (sscanf(buf, "%x %x", ®, &val) != 2)
1289 if (reg > 4 || val > 255)
1292 ret = bq2415x_i2c_write(bq, reg, val);
1298 /* print value of chip register, format: 'register=value' */
1299 static ssize_t bq2415x_sysfs_print_reg(struct bq2415x_device *bq,
1303 int ret = bq2415x_i2c_read(bq, reg);
1306 return sprintf(buf, "%#.2x=error %d\n", reg, ret);
1307 return sprintf(buf, "%#.2x=%#.2x\n", reg, ret);
1310 /* show all raw values of chip register, format per line: 'register=value' */
1311 static ssize_t bq2415x_sysfs_show_registers(struct device *dev,
1312 struct device_attribute *attr,
1315 struct power_supply *psy = dev_get_drvdata(dev);
1316 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
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);
1327 /* set current and voltage limit entries (in mA or mV) */
1328 static ssize_t bq2415x_sysfs_set_limit(struct device *dev,
1329 struct device_attribute *attr,
1333 struct power_supply *psy = dev_get_drvdata(dev);
1334 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1338 if (kstrtol(buf, 10, &val) < 0)
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);
1359 /* show current and voltage limit entries (in mA or mV) */
1360 static ssize_t bq2415x_sysfs_show_limit(struct device *dev,
1361 struct device_attribute *attr,
1364 struct power_supply *psy = dev_get_drvdata(dev);
1365 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
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);
1383 return sprintf(buf, "%d\n", ret);
1386 /* set *_enable entries */
1387 static ssize_t bq2415x_sysfs_set_enable(struct device *dev,
1388 struct device_attribute *attr,
1392 struct power_supply *psy = dev_get_drvdata(dev);
1393 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1394 enum bq2415x_command command;
1398 if (kstrtol(buf, 10, &val) < 0)
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;
1416 ret = bq2415x_exec_command(bq, command);
1422 /* show *_enable entries */
1423 static ssize_t bq2415x_sysfs_show_enable(struct device *dev,
1424 struct device_attribute *attr,
1427 struct power_supply *psy = dev_get_drvdata(dev);
1428 struct bq2415x_device *bq = power_supply_get_drvdata(psy);
1429 enum bq2415x_command command;
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;
1443 ret = bq2415x_exec_command(bq, command);
1446 return sprintf(buf, "%d\n", ret);
1449 static DEVICE_ATTR(current_limit, S_IWUSR | S_IRUGO,
1450 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1451 static DEVICE_ATTR(weak_battery_voltage, S_IWUSR | S_IRUGO,
1452 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1453 static DEVICE_ATTR(battery_regulation_voltage, S_IWUSR | S_IRUGO,
1454 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1455 static DEVICE_ATTR(charge_current, S_IWUSR | S_IRUGO,
1456 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1457 static DEVICE_ATTR(termination_current, S_IWUSR | S_IRUGO,
1458 bq2415x_sysfs_show_limit, bq2415x_sysfs_set_limit);
1460 static DEVICE_ATTR(charge_termination_enable, S_IWUSR | S_IRUGO,
1461 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1462 static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO,
1463 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1464 static DEVICE_ATTR(otg_pin_enable, S_IWUSR | S_IRUGO,
1465 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1466 static DEVICE_ATTR(stat_pin_enable, S_IWUSR | S_IRUGO,
1467 bq2415x_sysfs_show_enable, bq2415x_sysfs_set_enable);
1469 static DEVICE_ATTR(reported_mode, S_IRUGO,
1470 bq2415x_sysfs_show_reported_mode, NULL);
1471 static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
1472 bq2415x_sysfs_show_mode, bq2415x_sysfs_set_mode);
1473 static DEVICE_ATTR(timer, S_IWUSR | S_IRUGO,
1474 bq2415x_sysfs_show_timer, bq2415x_sysfs_set_timer);
1476 static DEVICE_ATTR(registers, S_IWUSR | S_IRUGO,
1477 bq2415x_sysfs_show_registers, bq2415x_sysfs_set_registers);
1479 static DEVICE_ATTR(otg_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1480 static DEVICE_ATTR(charge_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1481 static DEVICE_ATTR(boost_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1482 static DEVICE_ATTR(fault_status, S_IRUGO, bq2415x_sysfs_show_status, NULL);
1484 static struct attribute *bq2415x_sysfs_attributes[] = {
1486 * TODO: some (appropriate) of these attrs should be switched to
1487 * use power supply class props.
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,
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,
1500 &dev_attr_reported_mode.attr,
1501 &dev_attr_mode.attr,
1502 &dev_attr_timer.attr,
1504 &dev_attr_registers.attr,
1506 &dev_attr_otg_status.attr,
1507 &dev_attr_charge_status.attr,
1508 &dev_attr_boost_status.attr,
1509 &dev_attr_fault_status.attr,
1513 static const struct attribute_group bq2415x_sysfs_attr_group = {
1514 .attrs = bq2415x_sysfs_attributes,
1517 static int bq2415x_sysfs_init(struct bq2415x_device *bq)
1519 return sysfs_create_group(&bq->charger->dev.kobj,
1520 &bq2415x_sysfs_attr_group);
1523 static void bq2415x_sysfs_exit(struct bq2415x_device *bq)
1525 sysfs_remove_group(&bq->charger->dev.kobj, &bq2415x_sysfs_attr_group);
1528 /* main bq2415x probe function */
1529 static int bq2415x_probe(struct i2c_client *client,
1530 const struct i2c_device_id *id)
1535 struct bq2415x_device *bq;
1536 struct device_node *np = client->dev.of_node;
1537 struct bq2415x_platform_data *pdata = client->dev.platform_data;
1538 const struct acpi_device_id *acpi_id = NULL;
1540 if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
1541 dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
1545 /* Get new ID for the new device */
1546 mutex_lock(&bq2415x_id_mutex);
1547 num = idr_alloc(&bq2415x_id, client, 0, 0, GFP_KERNEL);
1548 mutex_unlock(&bq2415x_id_mutex);
1553 name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
1554 } else if (ACPI_HANDLE(&client->dev)) {
1556 acpi_match_device(client->dev.driver->acpi_match_table,
1558 name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
1561 dev_err(&client->dev, "failed to allocate device name\n");
1566 bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
1573 bq->notify_psy = power_supply_get_by_phandle(np,
1574 "ti,usb-charger-detection");
1576 if (IS_ERR(bq->notify_psy)) {
1577 dev_info(&client->dev,
1578 "no 'ti,usb-charger-detection' property (err=%ld)\n",
1579 PTR_ERR(bq->notify_psy));
1580 bq->notify_psy = NULL;
1581 } else if (!bq->notify_psy) {
1582 ret = -EPROBE_DEFER;
1585 } else if (pdata && pdata->notify_device) {
1586 bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
1588 bq->notify_psy = NULL;
1591 i2c_set_clientdata(client, bq);
1594 bq->dev = &client->dev;
1596 bq->chip = id->driver_data;
1597 else if (ACPI_HANDLE(bq->dev))
1598 bq->chip = acpi_id->driver_data;
1600 bq->mode = BQ2415X_MODE_OFF;
1601 bq->reported_mode = BQ2415X_MODE_OFF;
1605 if (np || ACPI_HANDLE(bq->dev)) {
1606 ret = device_property_read_u32(bq->dev,
1608 &bq->init_data.current_limit);
1611 ret = device_property_read_u32(bq->dev,
1612 "ti,weak-battery-voltage",
1613 &bq->init_data.weak_battery_voltage);
1616 ret = device_property_read_u32(bq->dev,
1617 "ti,battery-regulation-voltage",
1618 &bq->init_data.battery_regulation_voltage);
1621 ret = device_property_read_u32(bq->dev,
1622 "ti,charge-current",
1623 &bq->init_data.charge_current);
1626 ret = device_property_read_u32(bq->dev,
1627 "ti,termination-current",
1628 &bq->init_data.termination_current);
1631 ret = device_property_read_u32(bq->dev,
1632 "ti,resistor-sense",
1633 &bq->init_data.resistor_sense);
1637 memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
1640 bq2415x_reset_chip(bq);
1642 ret = bq2415x_power_supply_init(bq);
1644 dev_err(bq->dev, "failed to register power supply: %d\n", ret);
1648 ret = bq2415x_sysfs_init(bq);
1650 dev_err(bq->dev, "failed to create sysfs entries: %d\n", ret);
1654 ret = bq2415x_set_defaults(bq);
1656 dev_err(bq->dev, "failed to set default values: %d\n", ret);
1660 if (bq->notify_psy) {
1661 bq->nb.notifier_call = bq2415x_notifier_call;
1662 ret = power_supply_reg_notifier(&bq->nb);
1664 dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
1668 /* Query for initial reported_mode and set it */
1669 bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED,
1671 bq2415x_set_mode(bq, bq->reported_mode);
1674 dev_info(bq->dev, "automode enabled\n");
1677 dev_info(bq->dev, "automode not supported\n");
1680 INIT_DELAYED_WORK(&bq->work, bq2415x_timer_work);
1681 bq2415x_set_autotimer(bq, 1);
1683 dev_info(bq->dev, "driver registered\n");
1688 bq2415x_sysfs_exit(bq);
1690 bq2415x_power_supply_exit(bq);
1693 power_supply_put(bq->notify_psy);
1697 mutex_lock(&bq2415x_id_mutex);
1698 idr_remove(&bq2415x_id, num);
1699 mutex_unlock(&bq2415x_id_mutex);
1704 /* main bq2415x remove function */
1706 static int bq2415x_remove(struct i2c_client *client)
1708 struct bq2415x_device *bq = i2c_get_clientdata(client);
1710 if (bq->notify_psy) {
1711 power_supply_unreg_notifier(&bq->nb);
1712 power_supply_put(bq->notify_psy);
1715 bq2415x_sysfs_exit(bq);
1716 bq2415x_power_supply_exit(bq);
1718 bq2415x_reset_chip(bq);
1720 mutex_lock(&bq2415x_id_mutex);
1721 idr_remove(&bq2415x_id, bq->id);
1722 mutex_unlock(&bq2415x_id_mutex);
1724 dev_info(bq->dev, "driver unregistered\n");
1731 static 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 },
1743 { "bq24157s", BQ24157S },
1744 { "bq24158", BQ24158 },
1747 MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
1749 static 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 },
1765 MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
1767 static struct i2c_driver bq2415x_driver = {
1769 .name = "bq2415x-charger",
1770 .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
1772 .probe = bq2415x_probe,
1773 .remove = bq2415x_remove,
1774 .id_table = bq2415x_i2c_id_table,
1776 module_i2c_driver(bq2415x_driver);
1778 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1779 MODULE_DESCRIPTION("bq2415x charger driver");
1780 MODULE_LICENSE("GPL");