1 // SPDX-License-Identifier: GPL-2.0
2 // BQ256XX Battery Charger Driver
3 // Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
4 
5 #include <linux/err.h>
6 #include <linux/i2c.h>
7 #include <linux/init.h>
8 #include <linux/interrupt.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/power_supply.h>
13 #include <linux/regmap.h>
14 #include <linux/types.h>
15 #include <linux/usb/phy.h>
16 #include <linux/device.h>
17 #include <linux/moduleparam.h>
18 #include <linux/slab.h>
19 #include <linux/acpi.h>
20 
21 #define BQ256XX_MANUFACTURER "Texas Instruments"
22 
23 #define BQ256XX_INPUT_CURRENT_LIMIT		0x00
24 #define BQ256XX_CHARGER_CONTROL_0		0x01
25 #define BQ256XX_CHARGE_CURRENT_LIMIT		0x02
26 #define BQ256XX_PRECHG_AND_TERM_CURR_LIM	0x03
27 #define BQ256XX_BATTERY_VOLTAGE_LIMIT		0x04
28 #define BQ256XX_CHARGER_CONTROL_1		0x05
29 #define BQ256XX_CHARGER_CONTROL_2		0x06
30 #define BQ256XX_CHARGER_CONTROL_3		0x07
31 #define BQ256XX_CHARGER_STATUS_0		0x08
32 #define BQ256XX_CHARGER_STATUS_1		0x09
33 #define BQ256XX_CHARGER_STATUS_2		0x0a
34 #define BQ256XX_PART_INFORMATION		0x0b
35 #define BQ256XX_CHARGER_CONTROL_4		0x0c
36 
37 #define BQ256XX_IINDPM_MASK		GENMASK(4, 0)
38 #define BQ256XX_IINDPM_STEP_uA		100000
39 #define BQ256XX_IINDPM_OFFSET_uA	100000
40 #define BQ256XX_IINDPM_MIN_uA		100000
41 #define BQ256XX_IINDPM_MAX_uA		3200000
42 #define BQ256XX_IINDPM_DEF_uA		2400000
43 
44 #define BQ256XX_VINDPM_MASK		GENMASK(3, 0)
45 #define BQ256XX_VINDPM_STEP_uV		100000
46 #define BQ256XX_VINDPM_OFFSET_uV	3900000
47 #define BQ256XX_VINDPM_MIN_uV		3900000
48 #define BQ256XX_VINDPM_MAX_uV		5400000
49 #define BQ256XX_VINDPM_DEF_uV		4500000
50 
51 #define BQ256XX_VBATREG_MASK		GENMASK(7, 3)
52 #define BQ2560X_VBATREG_STEP_uV		32000
53 #define BQ2560X_VBATREG_OFFSET_uV	3856000
54 #define BQ2560X_VBATREG_MIN_uV		3856000
55 #define BQ2560X_VBATREG_MAX_uV		4624000
56 #define BQ2560X_VBATREG_DEF_uV		4208000
57 #define BQ25601D_VBATREG_OFFSET_uV	3847000
58 #define BQ25601D_VBATREG_MIN_uV		3847000
59 #define BQ25601D_VBATREG_MAX_uV		4615000
60 #define BQ25601D_VBATREG_DEF_uV		4199000
61 #define BQ2561X_VBATREG_STEP_uV		10000
62 #define BQ25611D_VBATREG_MIN_uV		3494000
63 #define BQ25611D_VBATREG_MAX_uV		4510000
64 #define BQ25611D_VBATREG_DEF_uV		4190000
65 #define BQ25618_VBATREG_MIN_uV		3504000
66 #define BQ25618_VBATREG_MAX_uV		4500000
67 #define BQ25618_VBATREG_DEF_uV		4200000
68 #define BQ256XX_VBATREG_BIT_SHIFT	3
69 #define BQ2561X_VBATREG_THRESH		0x8
70 #define BQ25611D_VBATREG_THRESH_uV	4290000
71 #define BQ25618_VBATREG_THRESH_uV	4300000
72 
73 #define BQ256XX_ITERM_MASK		GENMASK(3, 0)
74 #define BQ256XX_ITERM_STEP_uA		60000
75 #define BQ256XX_ITERM_OFFSET_uA		60000
76 #define BQ256XX_ITERM_MIN_uA		60000
77 #define BQ256XX_ITERM_MAX_uA		780000
78 #define BQ256XX_ITERM_DEF_uA		180000
79 #define BQ25618_ITERM_STEP_uA		20000
80 #define BQ25618_ITERM_OFFSET_uA		20000
81 #define BQ25618_ITERM_MIN_uA		20000
82 #define BQ25618_ITERM_MAX_uA		260000
83 #define BQ25618_ITERM_DEF_uA		60000
84 
85 #define BQ256XX_IPRECHG_MASK		GENMASK(7, 4)
86 #define BQ256XX_IPRECHG_STEP_uA		60000
87 #define BQ256XX_IPRECHG_OFFSET_uA	60000
88 #define BQ256XX_IPRECHG_MIN_uA		60000
89 #define BQ256XX_IPRECHG_MAX_uA		780000
90 #define BQ256XX_IPRECHG_DEF_uA		180000
91 #define BQ25618_IPRECHG_STEP_uA		20000
92 #define BQ25618_IPRECHG_OFFSET_uA	20000
93 #define BQ25618_IPRECHG_MIN_uA		20000
94 #define BQ25618_IPRECHG_MAX_uA		260000
95 #define BQ25618_IPRECHG_DEF_uA		40000
96 #define BQ256XX_IPRECHG_BIT_SHIFT	4
97 
98 #define BQ256XX_ICHG_MASK		GENMASK(5, 0)
99 #define BQ256XX_ICHG_STEP_uA		60000
100 #define BQ256XX_ICHG_MIN_uA		0
101 #define BQ256XX_ICHG_MAX_uA		3000000
102 #define BQ2560X_ICHG_DEF_uA		2040000
103 #define BQ25611D_ICHG_DEF_uA		1020000
104 #define BQ25618_ICHG_STEP_uA		20000
105 #define BQ25618_ICHG_MIN_uA		0
106 #define BQ25618_ICHG_MAX_uA		1500000
107 #define BQ25618_ICHG_DEF_uA		340000
108 #define BQ25618_ICHG_THRESH		0x3c
109 #define BQ25618_ICHG_THRESH_uA		1180000
110 
111 #define BQ256XX_VBUS_STAT_MASK		GENMASK(7, 5)
112 #define BQ256XX_VBUS_STAT_NO_INPUT	0
113 #define BQ256XX_VBUS_STAT_USB_SDP	BIT(5)
114 #define BQ256XX_VBUS_STAT_USB_CDP	BIT(6)
115 #define BQ256XX_VBUS_STAT_USB_DCP	(BIT(6) | BIT(5))
116 #define BQ256XX_VBUS_STAT_USB_OTG	(BIT(7) | BIT(6) | BIT(5))
117 
118 #define BQ256XX_CHRG_STAT_MASK		GENMASK(4, 3)
119 #define BQ256XX_CHRG_STAT_NOT_CHRGING	0
120 #define BQ256XX_CHRG_STAT_PRECHRGING	BIT(3)
121 #define BQ256XX_CHRG_STAT_FAST_CHRGING	BIT(4)
122 #define BQ256XX_CHRG_STAT_CHRG_TERM	(BIT(4) | BIT(3))
123 
124 #define BQ256XX_PG_STAT_MASK		BIT(2)
125 #define BQ256XX_WDT_FAULT_MASK		BIT(7)
126 #define BQ256XX_CHRG_FAULT_MASK		GENMASK(5, 4)
127 #define BQ256XX_CHRG_FAULT_NORMAL	0
128 #define BQ256XX_CHRG_FAULT_INPUT	BIT(4)
129 #define BQ256XX_CHRG_FAULT_THERM	BIT(5)
130 #define BQ256XX_CHRG_FAULT_CST_EXPIRE	(BIT(5) | BIT(4))
131 #define BQ256XX_BAT_FAULT_MASK		BIT(3)
132 #define BQ256XX_NTC_FAULT_MASK		GENMASK(2, 0)
133 #define BQ256XX_NTC_FAULT_WARM		BIT(1)
134 #define BQ256XX_NTC_FAULT_COOL		(BIT(1) | BIT(0))
135 #define BQ256XX_NTC_FAULT_COLD		(BIT(2) | BIT(0))
136 #define BQ256XX_NTC_FAULT_HOT		(BIT(2) | BIT(1))
137 
138 #define BQ256XX_NUM_WD_VAL	4
139 #define BQ256XX_WATCHDOG_MASK	GENMASK(5, 4)
140 #define BQ256XX_WATCHDOG_MAX	1600000
141 #define BQ256XX_WATCHDOG_DIS	0
142 #define BQ256XX_WDT_BIT_SHIFT	4
143 
144 #define BQ256XX_REG_RST		BIT(7)
145 
146 /**
147  * struct bq256xx_init_data -
148  * @ichg: fast charge current
149  * @iindpm: input current limit
150  * @vbatreg: charge voltage
151  * @iterm: termination current
152  * @iprechg: precharge current
153  * @vindpm: input voltage limit
154  * @ichg_max: maximum fast charge current
155  * @vbatreg_max: maximum charge voltage
156  */
157 struct bq256xx_init_data {
158 	u32 ichg;
159 	u32 iindpm;
160 	u32 vbatreg;
161 	u32 iterm;
162 	u32 iprechg;
163 	u32 vindpm;
164 	u32 ichg_max;
165 	u32 vbatreg_max;
166 };
167 
168 /**
169  * struct bq256xx_state -
170  * @vbus_stat: VBUS status according to BQ256XX_CHARGER_STATUS_0
171  * @chrg_stat: charging status according to BQ256XX_CHARGER_STATUS_0
172  * @online: PG status according to BQ256XX_CHARGER_STATUS_0
173  *
174  * @wdt_fault: watchdog fault according to BQ256XX_CHARGER_STATUS_1
175  * @bat_fault: battery fault according to BQ256XX_CHARGER_STATUS_1
176  * @chrg_fault: charging fault according to BQ256XX_CHARGER_STATUS_1
177  * @ntc_fault: TS fault according to BQ256XX_CHARGER_STATUS_1
178  */
179 struct bq256xx_state {
180 	u8 vbus_stat;
181 	u8 chrg_stat;
182 	bool online;
183 
184 	u8 wdt_fault;
185 	u8 bat_fault;
186 	u8 chrg_fault;
187 	u8 ntc_fault;
188 };
189 
190 enum bq256xx_id {
191 	BQ25600,
192 	BQ25600D,
193 	BQ25601,
194 	BQ25601D,
195 	BQ25618,
196 	BQ25619,
197 	BQ25611D,
198 };
199 
200 /**
201  * struct bq256xx_device -
202  * @client: i2c client structure
203  * @regmap: register map structure
204  * @dev: device structure
205  * @charger: power supply registered for the charger
206  * @battery: power supply registered for the battery
207  * @lock: mutex lock structure
208  *
209  * @usb2_phy: usb_phy identifier
210  * @usb3_phy: usb_phy identifier
211  * @usb_nb: notifier block
212  * @usb_work: usb work queue
213  * @usb_event: usb_event code
214  *
215  * @model_name: i2c name string
216  *
217  * @init_data: initialization data
218  * @chip_info: device variant information
219  * @state: device status and faults
220  * @watchdog_timer: watchdog timer value in milliseconds
221  */
222 struct bq256xx_device {
223 	struct i2c_client *client;
224 	struct device *dev;
225 	struct power_supply *charger;
226 	struct power_supply *battery;
227 	struct mutex lock;
228 	struct regmap *regmap;
229 
230 	struct usb_phy *usb2_phy;
231 	struct usb_phy *usb3_phy;
232 	struct notifier_block usb_nb;
233 	struct work_struct usb_work;
234 	unsigned long usb_event;
235 
236 	char model_name[I2C_NAME_SIZE];
237 
238 	struct bq256xx_init_data init_data;
239 	const struct bq256xx_chip_info *chip_info;
240 	struct bq256xx_state state;
241 	int watchdog_timer;
242 };
243 
244 /**
245  * struct bq256xx_chip_info -
246  * @model_id: device instance
247  *
248  * @bq256xx_regmap_config: regmap configuration struct
249  * @bq256xx_get_ichg: pointer to instance specific get_ichg function
250  * @bq256xx_get_iindpm: pointer to instance specific get_iindpm function
251  * @bq256xx_get_vbatreg: pointer to instance specific get_vbatreg function
252  * @bq256xx_get_iterm: pointer to instance specific get_iterm function
253  * @bq256xx_get_iprechg: pointer to instance specific get_iprechg function
254  * @bq256xx_get_vindpm: pointer to instance specific get_vindpm function
255  *
256  * @bq256xx_set_ichg: pointer to instance specific set_ichg function
257  * @bq256xx_set_iindpm: pointer to instance specific set_iindpm function
258  * @bq256xx_set_vbatreg: pointer to instance specific set_vbatreg function
259  * @bq256xx_set_iterm: pointer to instance specific set_iterm function
260  * @bq256xx_set_iprechg: pointer to instance specific set_iprechg function
261  * @bq256xx_set_vindpm: pointer to instance specific set_vindpm function
262  *
263  * @bq256xx_def_ichg: default ichg value in microamps
264  * @bq256xx_def_iindpm: default iindpm value in microamps
265  * @bq256xx_def_vbatreg: default vbatreg value in microvolts
266  * @bq256xx_def_iterm: default iterm value in microamps
267  * @bq256xx_def_iprechg: default iprechg value in microamps
268  * @bq256xx_def_vindpm: default vindpm value in microvolts
269  *
270  * @bq256xx_max_ichg: maximum charge current in microamps
271  * @bq256xx_max_vbatreg: maximum battery regulation voltage in microvolts
272  *
273  * @has_usb_detect: indicates whether device has BC1.2 detection
274  */
275 struct bq256xx_chip_info {
276 	int model_id;
277 
278 	const struct regmap_config *bq256xx_regmap_config;
279 
280 	int (*bq256xx_get_ichg)(struct bq256xx_device *bq);
281 	int (*bq256xx_get_iindpm)(struct bq256xx_device *bq);
282 	int (*bq256xx_get_vbatreg)(struct bq256xx_device *bq);
283 	int (*bq256xx_get_iterm)(struct bq256xx_device *bq);
284 	int (*bq256xx_get_iprechg)(struct bq256xx_device *bq);
285 	int (*bq256xx_get_vindpm)(struct bq256xx_device *bq);
286 
287 	int (*bq256xx_set_ichg)(struct bq256xx_device *bq, int ichg);
288 	int (*bq256xx_set_iindpm)(struct bq256xx_device *bq, int iindpm);
289 	int (*bq256xx_set_vbatreg)(struct bq256xx_device *bq, int vbatreg);
290 	int (*bq256xx_set_iterm)(struct bq256xx_device *bq, int iterm);
291 	int (*bq256xx_set_iprechg)(struct bq256xx_device *bq, int iprechg);
292 	int (*bq256xx_set_vindpm)(struct bq256xx_device *bq, int vindpm);
293 
294 	int bq256xx_def_ichg;
295 	int bq256xx_def_iindpm;
296 	int bq256xx_def_vbatreg;
297 	int bq256xx_def_iterm;
298 	int bq256xx_def_iprechg;
299 	int bq256xx_def_vindpm;
300 
301 	int bq256xx_max_ichg;
302 	int bq256xx_max_vbatreg;
303 
304 	bool has_usb_detect;
305 };
306 
307 static int bq256xx_watchdog_time[BQ256XX_NUM_WD_VAL] = {
308 	0, 40000, 80000, 1600000
309 };
310 
311 static const int bq25611d_vbatreg_values[] = {
312 	3494000, 3590000, 3686000, 3790000, 3894000, 3990000, 4090000, 4140000,
313 	4190000
314 };
315 
316 static const int bq25618_619_vbatreg_values[] = {
317 	3504000, 3600000, 3696000, 3800000, 3904000, 4000000, 4100000, 4150000,
318 	4200000
319 };
320 
321 static const int bq25618_619_ichg_values[] = {
322 	1290000, 1360000, 1430000, 1500000
323 };
324 
325 static enum power_supply_usb_type bq256xx_usb_type[] = {
326 	POWER_SUPPLY_USB_TYPE_SDP,
327 	POWER_SUPPLY_USB_TYPE_CDP,
328 	POWER_SUPPLY_USB_TYPE_DCP,
329 	POWER_SUPPLY_USB_TYPE_UNKNOWN,
330 	POWER_SUPPLY_USB_TYPE_ACA,
331 };
332 
333 static int bq256xx_array_parse(int array_size, int val, const int array[])
334 {
335 	int i = 0;
336 
337 	if (val < array[i])
338 		return i - 1;
339 
340 	if (val >= array[array_size - 1])
341 		return array_size - 1;
342 
343 	for (i = 1; i < array_size; i++) {
344 		if (val == array[i])
345 			return i;
346 
347 		if (val > array[i - 1] && val < array[i]) {
348 			if (val < array[i])
349 				return i - 1;
350 			else
351 				return i;
352 		}
353 	}
354 	return -EINVAL;
355 }
356 
357 static int bq256xx_usb_notifier(struct notifier_block *nb, unsigned long val,
358 				void *priv)
359 {
360 	struct bq256xx_device *bq =
361 			container_of(nb, struct bq256xx_device, usb_nb);
362 
363 	bq->usb_event = val;
364 	queue_work(system_power_efficient_wq, &bq->usb_work);
365 
366 	return NOTIFY_OK;
367 }
368 
369 static void bq256xx_usb_work(struct work_struct *data)
370 {
371 	struct bq256xx_device *bq =
372 			container_of(data, struct bq256xx_device, usb_work);
373 
374 	switch (bq->usb_event) {
375 	case USB_EVENT_ID:
376 		break;
377 	case USB_EVENT_NONE:
378 		power_supply_changed(bq->charger);
379 		break;
380 	default:
381 		dev_err(bq->dev, "Error switching to charger mode.\n");
382 		break;
383 	}
384 }
385 
386 static struct reg_default bq2560x_reg_defs[] = {
387 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
388 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
389 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0xa2},
390 	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x22},
391 	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x58},
392 	{BQ256XX_CHARGER_CONTROL_1, 0x9f},
393 	{BQ256XX_CHARGER_CONTROL_2, 0x66},
394 	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
395 };
396 
397 static struct reg_default bq25611d_reg_defs[] = {
398 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
399 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
400 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
401 	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
402 	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
403 	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
404 	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
405 	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
406 	{BQ256XX_PART_INFORMATION, 0x54},
407 	{BQ256XX_CHARGER_CONTROL_4, 0x75},
408 };
409 
410 static struct reg_default bq25618_619_reg_defs[] = {
411 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
412 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
413 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
414 	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
415 	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
416 	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
417 	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
418 	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
419 	{BQ256XX_PART_INFORMATION, 0x2c},
420 	{BQ256XX_CHARGER_CONTROL_4, 0x75},
421 };
422 
423 static int bq256xx_get_state(struct bq256xx_device *bq,
424 				struct bq256xx_state *state)
425 {
426 	unsigned int charger_status_0;
427 	unsigned int charger_status_1;
428 	int ret;
429 
430 	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_0,
431 						&charger_status_0);
432 	if (ret)
433 		return ret;
434 
435 	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_1,
436 						&charger_status_1);
437 	if (ret)
438 		return ret;
439 
440 	state->vbus_stat = charger_status_0 & BQ256XX_VBUS_STAT_MASK;
441 	state->chrg_stat = charger_status_0 & BQ256XX_CHRG_STAT_MASK;
442 	state->online = charger_status_0 & BQ256XX_PG_STAT_MASK;
443 
444 	state->wdt_fault = charger_status_1 & BQ256XX_WDT_FAULT_MASK;
445 	state->bat_fault = charger_status_1 & BQ256XX_BAT_FAULT_MASK;
446 	state->chrg_fault = charger_status_1 & BQ256XX_CHRG_FAULT_MASK;
447 	state->ntc_fault = charger_status_1 & BQ256XX_NTC_FAULT_MASK;
448 
449 	return 0;
450 }
451 
452 static int bq256xx_get_ichg_curr(struct bq256xx_device *bq)
453 {
454 	unsigned int charge_current_limit;
455 	unsigned int ichg_reg_code;
456 	int ret;
457 
458 	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
459 						&charge_current_limit);
460 	if (ret)
461 		return ret;
462 
463 	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
464 
465 	return ichg_reg_code * BQ256XX_ICHG_STEP_uA;
466 }
467 
468 static int bq25618_619_get_ichg_curr(struct bq256xx_device *bq)
469 {
470 	unsigned int charge_current_limit;
471 	unsigned int ichg_reg_code;
472 	int ret;
473 
474 	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
475 						&charge_current_limit);
476 	if (ret)
477 		return ret;
478 
479 	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;
480 
481 	if (ichg_reg_code < BQ25618_ICHG_THRESH)
482 		return ichg_reg_code * BQ25618_ICHG_STEP_uA;
483 
484 	return bq25618_619_ichg_values[ichg_reg_code - BQ25618_ICHG_THRESH];
485 }
486 
487 static int bq256xx_set_ichg_curr(struct bq256xx_device *bq, int ichg)
488 {
489 	unsigned int ichg_reg_code;
490 	int ichg_max = bq->init_data.ichg_max;
491 
492 	ichg = clamp(ichg, BQ256XX_ICHG_MIN_uA, ichg_max);
493 	ichg_reg_code = ichg / BQ256XX_ICHG_STEP_uA;
494 
495 	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
496 					BQ256XX_ICHG_MASK, ichg_reg_code);
497 }
498 
499 static int bq25618_619_set_ichg_curr(struct bq256xx_device *bq, int ichg)
500 {
501 	int array_size = ARRAY_SIZE(bq25618_619_ichg_values);
502 	unsigned int ichg_reg_code;
503 	int ichg_max = bq->init_data.ichg_max;
504 
505 	ichg = clamp(ichg, BQ25618_ICHG_MIN_uA, ichg_max);
506 
507 	if (ichg <= BQ25618_ICHG_THRESH_uA) {
508 		ichg_reg_code = ichg / BQ25618_ICHG_STEP_uA;
509 	} else {
510 		ichg_reg_code = bq256xx_array_parse(array_size, ichg,
511 			bq25618_619_ichg_values) + BQ25618_ICHG_THRESH;
512 	}
513 
514 	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
515 					BQ256XX_ICHG_MASK, ichg_reg_code);
516 }
517 
518 static int bq25618_619_get_chrg_volt(struct bq256xx_device *bq)
519 {
520 	unsigned int battery_volt_lim;
521 	unsigned int vbatreg_reg_code;
522 	int ret;
523 
524 	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
525 							&battery_volt_lim);
526 
527 	if (ret)
528 		return ret;
529 
530 	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
531 						BQ256XX_VBATREG_BIT_SHIFT;
532 
533 	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
534 		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
535 					BQ2561X_VBATREG_STEP_uV) +
536 					BQ25618_VBATREG_THRESH_uV;
537 
538 	return bq25618_619_vbatreg_values[vbatreg_reg_code];
539 }
540 
541 static int bq25611d_get_chrg_volt(struct bq256xx_device *bq)
542 {
543 	unsigned int battery_volt_lim;
544 	unsigned int vbatreg_reg_code;
545 	int ret;
546 
547 	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
548 							&battery_volt_lim);
549 	if (ret)
550 		return ret;
551 
552 	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
553 						BQ256XX_VBATREG_BIT_SHIFT;
554 
555 	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
556 		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
557 					BQ2561X_VBATREG_STEP_uV) +
558 					BQ25611D_VBATREG_THRESH_uV;
559 
560 	return bq25611d_vbatreg_values[vbatreg_reg_code];
561 }
562 
563 static int bq2560x_get_chrg_volt(struct bq256xx_device *bq)
564 {
565 	unsigned int battery_volt_lim;
566 	unsigned int vbatreg_reg_code;
567 	int ret;
568 
569 	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
570 							&battery_volt_lim);
571 	if (ret)
572 		return ret;
573 
574 	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
575 						BQ256XX_VBATREG_BIT_SHIFT;
576 
577 	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
578 					+ BQ2560X_VBATREG_OFFSET_uV;
579 }
580 
581 static int bq25601d_get_chrg_volt(struct bq256xx_device *bq)
582 {
583 	unsigned int battery_volt_lim;
584 	unsigned int vbatreg_reg_code;
585 	int ret;
586 
587 	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
588 							&battery_volt_lim);
589 	if (ret)
590 		return ret;
591 
592 	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
593 						BQ256XX_VBATREG_BIT_SHIFT;
594 
595 	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
596 					+ BQ25601D_VBATREG_OFFSET_uV;
597 }
598 
599 static int bq25618_619_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
600 {
601 	int array_size = ARRAY_SIZE(bq25618_619_vbatreg_values);
602 	unsigned int vbatreg_reg_code;
603 	int vbatreg_max = bq->init_data.vbatreg_max;
604 
605 	vbatreg = clamp(vbatreg, BQ25618_VBATREG_MIN_uV, vbatreg_max);
606 
607 	if (vbatreg > BQ25618_VBATREG_THRESH_uV)
608 		vbatreg_reg_code = ((vbatreg -
609 		BQ25618_VBATREG_THRESH_uV) /
610 		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
611 	else {
612 		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
613 						bq25618_619_vbatreg_values);
614 	}
615 
616 	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
617 				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
618 						BQ256XX_VBATREG_BIT_SHIFT);
619 }
620 
621 static int bq25611d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
622 {
623 	int array_size = ARRAY_SIZE(bq25611d_vbatreg_values);
624 	unsigned int vbatreg_reg_code;
625 	int vbatreg_max = bq->init_data.vbatreg_max;
626 
627 	vbatreg = clamp(vbatreg, BQ25611D_VBATREG_MIN_uV, vbatreg_max);
628 
629 	if (vbatreg > BQ25611D_VBATREG_THRESH_uV)
630 		vbatreg_reg_code = ((vbatreg -
631 		BQ25611D_VBATREG_THRESH_uV) /
632 		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
633 	else {
634 		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
635 						bq25611d_vbatreg_values);
636 	}
637 
638 	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
639 				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
640 						BQ256XX_VBATREG_BIT_SHIFT);
641 }
642 
643 static int bq2560x_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
644 {
645 	unsigned int vbatreg_reg_code;
646 	int vbatreg_max = bq->init_data.vbatreg_max;
647 
648 	vbatreg = clamp(vbatreg, BQ2560X_VBATREG_MIN_uV, vbatreg_max);
649 
650 	vbatreg_reg_code = (vbatreg - BQ2560X_VBATREG_OFFSET_uV) /
651 						BQ2560X_VBATREG_STEP_uV;
652 
653 	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
654 				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
655 						BQ256XX_VBATREG_BIT_SHIFT);
656 }
657 
658 static int bq25601d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
659 {
660 	unsigned int vbatreg_reg_code;
661 	int vbatreg_max = bq->init_data.vbatreg_max;
662 
663 	vbatreg = clamp(vbatreg, BQ25601D_VBATREG_MIN_uV, vbatreg_max);
664 
665 	vbatreg_reg_code = (vbatreg - BQ25601D_VBATREG_OFFSET_uV) /
666 						BQ2560X_VBATREG_STEP_uV;
667 
668 	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
669 				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
670 						BQ256XX_VBATREG_BIT_SHIFT);
671 }
672 
673 static int bq256xx_get_prechrg_curr(struct bq256xx_device *bq)
674 {
675 	unsigned int prechg_and_term_curr_lim;
676 	unsigned int iprechg_reg_code;
677 	int ret;
678 
679 	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
680 						&prechg_and_term_curr_lim);
681 	if (ret)
682 		return ret;
683 
684 	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
685 						>> BQ256XX_IPRECHG_BIT_SHIFT;
686 
687 	return (iprechg_reg_code * BQ256XX_IPRECHG_STEP_uA) +
688 						BQ256XX_IPRECHG_OFFSET_uA;
689 }
690 
691 static int bq256xx_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
692 {
693 	unsigned int iprechg_reg_code;
694 
695 	iprechg = clamp(iprechg, BQ256XX_IPRECHG_MIN_uA,
696 						BQ256XX_IPRECHG_MAX_uA);
697 
698 	iprechg_reg_code = ((iprechg - BQ256XX_IPRECHG_OFFSET_uA) /
699 			BQ256XX_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
700 
701 	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
702 				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
703 }
704 
705 static int bq25618_619_get_prechrg_curr(struct bq256xx_device *bq)
706 {
707 	unsigned int prechg_and_term_curr_lim;
708 	unsigned int iprechg_reg_code;
709 	int ret;
710 
711 	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
712 						&prechg_and_term_curr_lim);
713 	if (ret)
714 		return ret;
715 
716 	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
717 						>> BQ256XX_IPRECHG_BIT_SHIFT;
718 
719 	return (iprechg_reg_code * BQ25618_IPRECHG_STEP_uA) +
720 						BQ25618_IPRECHG_OFFSET_uA;
721 }
722 
723 static int bq25618_619_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
724 {
725 	unsigned int iprechg_reg_code;
726 
727 	iprechg = clamp(iprechg, BQ25618_IPRECHG_MIN_uA,
728 						BQ25618_IPRECHG_MAX_uA);
729 
730 	iprechg_reg_code = ((iprechg - BQ25618_IPRECHG_OFFSET_uA) /
731 			BQ25618_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;
732 
733 	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
734 				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
735 }
736 
737 static int bq256xx_get_term_curr(struct bq256xx_device *bq)
738 {
739 	unsigned int prechg_and_term_curr_lim;
740 	unsigned int iterm_reg_code;
741 	int ret;
742 
743 	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
744 						&prechg_and_term_curr_lim);
745 	if (ret)
746 		return ret;
747 
748 	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
749 
750 	return (iterm_reg_code * BQ256XX_ITERM_STEP_uA) +
751 						BQ256XX_ITERM_OFFSET_uA;
752 }
753 
754 static int bq256xx_set_term_curr(struct bq256xx_device *bq, int iterm)
755 {
756 	unsigned int iterm_reg_code;
757 
758 	iterm = clamp(iterm, BQ256XX_ITERM_MIN_uA, BQ256XX_ITERM_MAX_uA);
759 
760 	iterm_reg_code = (iterm - BQ256XX_ITERM_OFFSET_uA) /
761 							BQ256XX_ITERM_STEP_uA;
762 
763 	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
764 				BQ256XX_ITERM_MASK, iterm_reg_code);
765 }
766 
767 static int bq25618_619_get_term_curr(struct bq256xx_device *bq)
768 {
769 	unsigned int prechg_and_term_curr_lim;
770 	unsigned int iterm_reg_code;
771 	int ret;
772 
773 	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
774 						&prechg_and_term_curr_lim);
775 	if (ret)
776 		return ret;
777 
778 	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;
779 
780 	return (iterm_reg_code * BQ25618_ITERM_STEP_uA) +
781 						BQ25618_ITERM_OFFSET_uA;
782 }
783 
784 static int bq25618_619_set_term_curr(struct bq256xx_device *bq, int iterm)
785 {
786 	unsigned int iterm_reg_code;
787 
788 	iterm = clamp(iterm, BQ25618_ITERM_MIN_uA, BQ25618_ITERM_MAX_uA);
789 
790 	iterm_reg_code = (iterm - BQ25618_ITERM_OFFSET_uA) /
791 							BQ25618_ITERM_STEP_uA;
792 
793 	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
794 				BQ256XX_ITERM_MASK, iterm_reg_code);
795 }
796 
797 static int bq256xx_get_input_volt_lim(struct bq256xx_device *bq)
798 {
799 	unsigned int charger_control_2;
800 	unsigned int vindpm_reg_code;
801 	int ret;
802 
803 	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
804 						&charger_control_2);
805 	if (ret)
806 		return ret;
807 
808 	vindpm_reg_code = charger_control_2 & BQ256XX_VINDPM_MASK;
809 
810 	return (vindpm_reg_code * BQ256XX_VINDPM_STEP_uV) +
811 						BQ256XX_VINDPM_OFFSET_uV;
812 }
813 
814 static int bq256xx_set_input_volt_lim(struct bq256xx_device *bq, int vindpm)
815 {
816 	unsigned int vindpm_reg_code;
817 
818 	vindpm = clamp(vindpm, BQ256XX_VINDPM_MIN_uV, BQ256XX_VINDPM_MAX_uV);
819 
820 	vindpm_reg_code = (vindpm - BQ256XX_VINDPM_OFFSET_uV) /
821 						BQ256XX_VINDPM_STEP_uV;
822 
823 	return regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
824 					BQ256XX_VINDPM_MASK, vindpm_reg_code);
825 }
826 
827 static int bq256xx_get_input_curr_lim(struct bq256xx_device *bq)
828 {
829 	unsigned int input_current_limit;
830 	unsigned int iindpm_reg_code;
831 	int ret;
832 
833 	ret = regmap_read(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
834 						&input_current_limit);
835 	if (ret)
836 		return ret;
837 
838 	iindpm_reg_code = input_current_limit & BQ256XX_IINDPM_MASK;
839 
840 	return (iindpm_reg_code * BQ256XX_IINDPM_STEP_uA) +
841 						BQ256XX_IINDPM_OFFSET_uA;
842 }
843 
844 static int bq256xx_set_input_curr_lim(struct bq256xx_device *bq, int iindpm)
845 {
846 	unsigned int iindpm_reg_code;
847 
848 	iindpm = clamp(iindpm, BQ256XX_IINDPM_MIN_uA, BQ256XX_IINDPM_MAX_uA);
849 
850 	iindpm_reg_code = (iindpm - BQ256XX_IINDPM_OFFSET_uA) /
851 							BQ256XX_IINDPM_STEP_uA;
852 
853 	return regmap_update_bits(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
854 					BQ256XX_IINDPM_MASK, iindpm_reg_code);
855 }
856 
857 static void bq256xx_charger_reset(void *data)
858 {
859 	struct bq256xx_device *bq = data;
860 
861 	regmap_update_bits(bq->regmap, BQ256XX_PART_INFORMATION,
862 					BQ256XX_REG_RST, BQ256XX_REG_RST);
863 
864 	if (!IS_ERR_OR_NULL(bq->usb2_phy))
865 		usb_unregister_notifier(bq->usb2_phy, &bq->usb_nb);
866 
867 	if (!IS_ERR_OR_NULL(bq->usb3_phy))
868 		usb_unregister_notifier(bq->usb3_phy, &bq->usb_nb);
869 }
870 
871 static int bq256xx_set_charger_property(struct power_supply *psy,
872 		enum power_supply_property prop,
873 		const union power_supply_propval *val)
874 {
875 	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
876 	int ret = -EINVAL;
877 
878 	switch (prop) {
879 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
880 		ret = bq->chip_info->bq256xx_set_iindpm(bq, val->intval);
881 		if (ret)
882 			return ret;
883 		break;
884 
885 	case POWER_SUPPLY_PROP_STATUS:
886 		break;
887 
888 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
889 		ret = bq->chip_info->bq256xx_set_vbatreg(bq, val->intval);
890 		if (ret)
891 			return ret;
892 		break;
893 
894 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
895 		ret = bq->chip_info->bq256xx_set_ichg(bq, val->intval);
896 		if (ret)
897 			return ret;
898 		break;
899 
900 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
901 		ret = bq->chip_info->bq256xx_set_iprechg(bq, val->intval);
902 		if (ret)
903 			return ret;
904 		break;
905 
906 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
907 		ret = bq->chip_info->bq256xx_set_iterm(bq, val->intval);
908 		if (ret)
909 			return ret;
910 		break;
911 
912 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
913 		ret = bq->chip_info->bq256xx_set_vindpm(bq, val->intval);
914 		if (ret)
915 			return ret;
916 		break;
917 
918 	default:
919 		break;
920 	}
921 
922 	return ret;
923 }
924 
925 
926 static int bq256xx_get_battery_property(struct power_supply *psy,
927 				enum power_supply_property psp,
928 				union power_supply_propval *val)
929 {
930 	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
931 
932 	switch (psp) {
933 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
934 		val->intval = bq->init_data.ichg_max;
935 		break;
936 
937 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
938 		val->intval = bq->init_data.vbatreg_max;
939 		break;
940 
941 	default:
942 		return -EINVAL;
943 	}
944 
945 	return 0;
946 }
947 
948 static int bq256xx_get_charger_property(struct power_supply *psy,
949 				enum power_supply_property psp,
950 				union power_supply_propval *val)
951 {
952 	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
953 	struct bq256xx_state state;
954 	int ret = 0;
955 
956 	mutex_lock(&bq->lock);
957 	ret = bq256xx_get_state(bq, &state);
958 	mutex_unlock(&bq->lock);
959 	if (ret)
960 		return ret;
961 
962 	switch (psp) {
963 	case POWER_SUPPLY_PROP_STATUS:
964 		if (state.vbus_stat == BQ256XX_VBUS_STAT_NO_INPUT ||
965 		    state.vbus_stat == BQ256XX_VBUS_STAT_USB_OTG)
966 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
967 		else if (state.chrg_stat == BQ256XX_CHRG_STAT_NOT_CHRGING)
968 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
969 		else if (state.chrg_stat == BQ256XX_CHRG_STAT_CHRG_TERM)
970 			val->intval = POWER_SUPPLY_STATUS_FULL;
971 		else
972 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
973 		break;
974 
975 	case POWER_SUPPLY_PROP_HEALTH:
976 		val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
977 		if (state.wdt_fault) {
978 			val->intval =
979 				POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
980 		} else if (state.bat_fault) {
981 			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
982 		} else {
983 			switch (state.chrg_stat) {
984 			case BQ256XX_CHRG_FAULT_INPUT:
985 				val->intval =
986 					POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
987 				break;
988 			case BQ256XX_CHRG_FAULT_THERM:
989 				val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
990 				break;
991 			case BQ256XX_CHRG_FAULT_CST_EXPIRE:
992 				val->intval =
993 				POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
994 				break;
995 			default:
996 				break;
997 			}
998 
999 			switch (state.ntc_fault) {
1000 			case BQ256XX_NTC_FAULT_WARM:
1001 				val->intval = POWER_SUPPLY_HEALTH_WARM;
1002 				break;
1003 			case BQ256XX_NTC_FAULT_COOL:
1004 				val->intval = POWER_SUPPLY_HEALTH_COOL;
1005 				break;
1006 			case BQ256XX_NTC_FAULT_COLD:
1007 				val->intval = POWER_SUPPLY_HEALTH_COLD;
1008 				break;
1009 			case BQ256XX_NTC_FAULT_HOT:
1010 				val->intval = POWER_SUPPLY_HEALTH_HOT;
1011 				break;
1012 			default:
1013 				val->intval = POWER_SUPPLY_HEALTH_GOOD;
1014 				break;
1015 			}
1016 		}
1017 		break;
1018 
1019 	case POWER_SUPPLY_PROP_USB_TYPE:
1020 		if (bq->chip_info->has_usb_detect) {
1021 			switch (state.vbus_stat) {
1022 			case BQ256XX_VBUS_STAT_USB_SDP:
1023 				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
1024 				break;
1025 			case BQ256XX_VBUS_STAT_USB_CDP:
1026 				val->intval = POWER_SUPPLY_USB_TYPE_CDP;
1027 				break;
1028 			case BQ256XX_VBUS_STAT_USB_DCP:
1029 				val->intval = POWER_SUPPLY_USB_TYPE_DCP;
1030 				break;
1031 			case BQ256XX_VBUS_STAT_USB_OTG:
1032 				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
1033 				break;
1034 			default:
1035 				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
1036 				break;
1037 			}
1038 		} else {
1039 			switch (state.vbus_stat) {
1040 			case BQ256XX_VBUS_STAT_USB_SDP:
1041 				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
1042 				break;
1043 			case BQ256XX_VBUS_STAT_USB_OTG:
1044 				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
1045 				break;
1046 			default:
1047 				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
1048 				break;
1049 			}
1050 		}
1051 		break;
1052 
1053 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
1054 		switch (state.chrg_stat) {
1055 		case BQ256XX_CHRG_STAT_NOT_CHRGING:
1056 			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
1057 			break;
1058 		case BQ256XX_CHRG_STAT_PRECHRGING:
1059 			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
1060 			break;
1061 		case BQ256XX_CHRG_STAT_FAST_CHRGING:
1062 			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
1063 			break;
1064 		case BQ256XX_CHRG_STAT_CHRG_TERM:
1065 			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
1066 			break;
1067 		default:
1068 			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
1069 		}
1070 		break;
1071 
1072 	case POWER_SUPPLY_PROP_MANUFACTURER:
1073 		val->strval = BQ256XX_MANUFACTURER;
1074 		break;
1075 
1076 	case POWER_SUPPLY_PROP_MODEL_NAME:
1077 		val->strval = bq->model_name;
1078 		break;
1079 
1080 	case POWER_SUPPLY_PROP_ONLINE:
1081 		val->intval = state.online;
1082 		break;
1083 
1084 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
1085 		ret = bq->chip_info->bq256xx_get_vindpm(bq);
1086 		if (ret < 0)
1087 			return ret;
1088 		val->intval = ret;
1089 		break;
1090 
1091 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
1092 		ret = bq->chip_info->bq256xx_get_iindpm(bq);
1093 		if (ret < 0)
1094 			return ret;
1095 		val->intval = ret;
1096 		break;
1097 
1098 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
1099 		ret = bq->chip_info->bq256xx_get_vbatreg(bq);
1100 		if (ret < 0)
1101 			return ret;
1102 		val->intval = ret;
1103 		break;
1104 
1105 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
1106 		ret = bq->chip_info->bq256xx_get_ichg(bq);
1107 		if (ret < 0)
1108 			return ret;
1109 		val->intval = ret;
1110 		break;
1111 
1112 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
1113 		ret = bq->chip_info->bq256xx_get_iprechg(bq);
1114 		if (ret < 0)
1115 			return ret;
1116 		val->intval = ret;
1117 		break;
1118 
1119 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
1120 		ret = bq->chip_info->bq256xx_get_iterm(bq);
1121 		if (ret < 0)
1122 			return ret;
1123 		val->intval = ret;
1124 		break;
1125 
1126 	default:
1127 		return -EINVAL;
1128 	}
1129 
1130 	return ret;
1131 }
1132 
1133 static bool bq256xx_state_changed(struct bq256xx_device *bq,
1134 				  struct bq256xx_state *new_state)
1135 {
1136 	struct bq256xx_state old_state;
1137 
1138 	mutex_lock(&bq->lock);
1139 	old_state = bq->state;
1140 	mutex_unlock(&bq->lock);
1141 
1142 	return memcmp(&old_state, new_state, sizeof(struct bq256xx_state)) != 0;
1143 }
1144 
1145 static irqreturn_t bq256xx_irq_handler_thread(int irq, void *private)
1146 {
1147 	struct bq256xx_device *bq = private;
1148 	struct bq256xx_state state;
1149 	int ret;
1150 
1151 	ret = bq256xx_get_state(bq, &state);
1152 	if (ret < 0)
1153 		goto irq_out;
1154 
1155 	if (!bq256xx_state_changed(bq, &state))
1156 		goto irq_out;
1157 
1158 	mutex_lock(&bq->lock);
1159 	bq->state = state;
1160 	mutex_unlock(&bq->lock);
1161 
1162 	power_supply_changed(bq->charger);
1163 
1164 irq_out:
1165 	return IRQ_HANDLED;
1166 }
1167 
1168 static enum power_supply_property bq256xx_power_supply_props[] = {
1169 	POWER_SUPPLY_PROP_MANUFACTURER,
1170 	POWER_SUPPLY_PROP_MODEL_NAME,
1171 	POWER_SUPPLY_PROP_STATUS,
1172 	POWER_SUPPLY_PROP_ONLINE,
1173 	POWER_SUPPLY_PROP_HEALTH,
1174 	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
1175 	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
1176 	POWER_SUPPLY_PROP_CHARGE_TYPE,
1177 	POWER_SUPPLY_PROP_USB_TYPE,
1178 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
1179 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
1180 	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
1181 	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
1182 };
1183 
1184 static enum power_supply_property bq256xx_battery_props[] = {
1185 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
1186 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
1187 };
1188 
1189 static int bq256xx_property_is_writeable(struct power_supply *psy,
1190 					 enum power_supply_property prop)
1191 {
1192 	switch (prop) {
1193 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
1194 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
1195 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
1196 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
1197 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
1198 	case POWER_SUPPLY_PROP_STATUS:
1199 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
1200 		return true;
1201 	default:
1202 		return false;
1203 	}
1204 }
1205 
1206 static const struct power_supply_desc bq256xx_power_supply_desc = {
1207 	.name = "bq256xx-charger",
1208 	.type = POWER_SUPPLY_TYPE_USB,
1209 	.usb_types = bq256xx_usb_type,
1210 	.num_usb_types = ARRAY_SIZE(bq256xx_usb_type),
1211 	.properties = bq256xx_power_supply_props,
1212 	.num_properties = ARRAY_SIZE(bq256xx_power_supply_props),
1213 	.get_property = bq256xx_get_charger_property,
1214 	.set_property = bq256xx_set_charger_property,
1215 	.property_is_writeable = bq256xx_property_is_writeable,
1216 };
1217 
1218 static struct power_supply_desc bq256xx_battery_desc = {
1219 	.name			= "bq256xx-battery",
1220 	.type			= POWER_SUPPLY_TYPE_BATTERY,
1221 	.get_property		= bq256xx_get_battery_property,
1222 	.properties		= bq256xx_battery_props,
1223 	.num_properties		= ARRAY_SIZE(bq256xx_battery_props),
1224 	.property_is_writeable	= bq256xx_property_is_writeable,
1225 };
1226 
1227 
1228 static bool bq256xx_is_volatile_reg(struct device *dev, unsigned int reg)
1229 {
1230 	switch (reg) {
1231 	case BQ256XX_INPUT_CURRENT_LIMIT:
1232 	case BQ256XX_CHARGER_STATUS_0...BQ256XX_CHARGER_STATUS_2:
1233 		return true;
1234 	default:
1235 		return false;
1236 	}
1237 }
1238 
1239 static const struct regmap_config bq25600_regmap_config = {
1240 	.reg_bits = 8,
1241 	.val_bits = 8,
1242 
1243 	.max_register = BQ256XX_PART_INFORMATION,
1244 	.reg_defaults	= bq2560x_reg_defs,
1245 	.num_reg_defaults = ARRAY_SIZE(bq2560x_reg_defs),
1246 	.cache_type = REGCACHE_FLAT,
1247 	.volatile_reg = bq256xx_is_volatile_reg,
1248 };
1249 
1250 static const struct regmap_config bq25611d_regmap_config = {
1251 	.reg_bits = 8,
1252 	.val_bits = 8,
1253 
1254 	.max_register = BQ256XX_CHARGER_CONTROL_4,
1255 	.reg_defaults	= bq25611d_reg_defs,
1256 	.num_reg_defaults = ARRAY_SIZE(bq25611d_reg_defs),
1257 	.cache_type = REGCACHE_FLAT,
1258 	.volatile_reg = bq256xx_is_volatile_reg,
1259 };
1260 
1261 static const struct regmap_config bq25618_619_regmap_config = {
1262 	.reg_bits = 8,
1263 	.val_bits = 8,
1264 
1265 	.max_register = BQ256XX_CHARGER_CONTROL_4,
1266 	.reg_defaults	= bq25618_619_reg_defs,
1267 	.num_reg_defaults = ARRAY_SIZE(bq25618_619_reg_defs),
1268 	.cache_type = REGCACHE_FLAT,
1269 	.volatile_reg = bq256xx_is_volatile_reg,
1270 };
1271 
1272 static const struct bq256xx_chip_info bq256xx_chip_info_tbl[] = {
1273 	[BQ25600] = {
1274 		.model_id = BQ25600,
1275 		.bq256xx_regmap_config = &bq25600_regmap_config,
1276 		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
1277 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1278 		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
1279 		.bq256xx_get_iterm = bq256xx_get_term_curr,
1280 		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
1281 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1282 
1283 		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
1284 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1285 		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
1286 		.bq256xx_set_iterm = bq256xx_set_term_curr,
1287 		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
1288 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1289 
1290 		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
1291 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1292 		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
1293 		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
1294 		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
1295 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1296 
1297 		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
1298 		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
1299 
1300 		.has_usb_detect = false,
1301 	},
1302 
1303 	[BQ25600D] = {
1304 		.model_id = BQ25600D,
1305 		.bq256xx_regmap_config = &bq25600_regmap_config,
1306 		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
1307 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1308 		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
1309 		.bq256xx_get_iterm = bq256xx_get_term_curr,
1310 		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
1311 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1312 
1313 		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
1314 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1315 		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
1316 		.bq256xx_set_iterm = bq256xx_set_term_curr,
1317 		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
1318 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1319 
1320 		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
1321 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1322 		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
1323 		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
1324 		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
1325 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1326 
1327 		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
1328 		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
1329 
1330 		.has_usb_detect = true,
1331 	},
1332 
1333 	[BQ25601] = {
1334 		.model_id = BQ25601,
1335 		.bq256xx_regmap_config = &bq25600_regmap_config,
1336 		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
1337 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1338 		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
1339 		.bq256xx_get_iterm = bq256xx_get_term_curr,
1340 		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
1341 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1342 
1343 		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
1344 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1345 		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
1346 		.bq256xx_set_iterm = bq256xx_set_term_curr,
1347 		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
1348 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1349 
1350 		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
1351 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1352 		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
1353 		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
1354 		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
1355 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1356 
1357 		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
1358 		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
1359 
1360 		.has_usb_detect = false,
1361 	},
1362 
1363 	[BQ25601D] = {
1364 		.model_id = BQ25601D,
1365 		.bq256xx_regmap_config = &bq25600_regmap_config,
1366 		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
1367 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1368 		.bq256xx_get_vbatreg = bq25601d_get_chrg_volt,
1369 		.bq256xx_get_iterm = bq256xx_get_term_curr,
1370 		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
1371 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1372 
1373 		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
1374 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1375 		.bq256xx_set_vbatreg = bq25601d_set_chrg_volt,
1376 		.bq256xx_set_iterm = bq256xx_set_term_curr,
1377 		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
1378 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1379 
1380 		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
1381 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1382 		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
1383 		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
1384 		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
1385 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1386 
1387 		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
1388 		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,
1389 
1390 		.has_usb_detect = true,
1391 	},
1392 
1393 	[BQ25611D] = {
1394 		.model_id = BQ25611D,
1395 		.bq256xx_regmap_config = &bq25611d_regmap_config,
1396 		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
1397 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1398 		.bq256xx_get_vbatreg = bq25611d_get_chrg_volt,
1399 		.bq256xx_get_iterm = bq256xx_get_term_curr,
1400 		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
1401 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1402 
1403 		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
1404 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1405 		.bq256xx_set_vbatreg = bq25611d_set_chrg_volt,
1406 		.bq256xx_set_iterm = bq256xx_set_term_curr,
1407 		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
1408 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1409 
1410 		.bq256xx_def_ichg = BQ25611D_ICHG_DEF_uA,
1411 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1412 		.bq256xx_def_vbatreg = BQ25611D_VBATREG_DEF_uV,
1413 		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
1414 		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
1415 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1416 
1417 		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
1418 		.bq256xx_max_vbatreg = BQ25611D_VBATREG_MAX_uV,
1419 
1420 		.has_usb_detect = true,
1421 	},
1422 
1423 	[BQ25618] = {
1424 		.model_id = BQ25618,
1425 		.bq256xx_regmap_config = &bq25618_619_regmap_config,
1426 		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
1427 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1428 		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
1429 		.bq256xx_get_iterm = bq25618_619_get_term_curr,
1430 		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
1431 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1432 
1433 		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
1434 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1435 		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
1436 		.bq256xx_set_iterm = bq25618_619_set_term_curr,
1437 		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
1438 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1439 
1440 		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
1441 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1442 		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
1443 		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
1444 		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
1445 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1446 
1447 		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
1448 		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
1449 
1450 		.has_usb_detect = false,
1451 	},
1452 
1453 	[BQ25619] = {
1454 		.model_id = BQ25619,
1455 		.bq256xx_regmap_config = &bq25618_619_regmap_config,
1456 		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
1457 		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
1458 		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
1459 		.bq256xx_get_iterm = bq25618_619_get_term_curr,
1460 		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
1461 		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,
1462 
1463 		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
1464 		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
1465 		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
1466 		.bq256xx_set_iterm = bq25618_619_set_term_curr,
1467 		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
1468 		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,
1469 
1470 		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
1471 		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
1472 		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
1473 		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
1474 		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
1475 		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,
1476 
1477 		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
1478 		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,
1479 
1480 		.has_usb_detect = false,
1481 	},
1482 };
1483 
1484 static int bq256xx_power_supply_init(struct bq256xx_device *bq,
1485 		struct power_supply_config *psy_cfg, struct device *dev)
1486 {
1487 	bq->charger = devm_power_supply_register(bq->dev,
1488 						 &bq256xx_power_supply_desc,
1489 						 psy_cfg);
1490 	if (IS_ERR(bq->charger)) {
1491 		dev_err(dev, "power supply register charger failed\n");
1492 		return PTR_ERR(bq->charger);
1493 	}
1494 
1495 	bq->battery = devm_power_supply_register(bq->dev,
1496 						      &bq256xx_battery_desc,
1497 						      psy_cfg);
1498 	if (IS_ERR(bq->battery)) {
1499 		dev_err(dev, "power supply register battery failed\n");
1500 		return PTR_ERR(bq->battery);
1501 	}
1502 	return 0;
1503 }
1504 
1505 static int bq256xx_hw_init(struct bq256xx_device *bq)
1506 {
1507 	struct power_supply_battery_info *bat_info;
1508 	int wd_reg_val = BQ256XX_WATCHDOG_DIS;
1509 	int ret = 0;
1510 	int i;
1511 
1512 	for (i = 0; i < BQ256XX_NUM_WD_VAL; i++) {
1513 		if (bq->watchdog_timer == bq256xx_watchdog_time[i]) {
1514 			wd_reg_val = i;
1515 			break;
1516 		}
1517 		if (bq->watchdog_timer > bq256xx_watchdog_time[i] &&
1518 		    bq->watchdog_timer < bq256xx_watchdog_time[i + 1])
1519 			wd_reg_val = i;
1520 	}
1521 	ret = regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_1,
1522 				 BQ256XX_WATCHDOG_MASK, wd_reg_val <<
1523 						BQ256XX_WDT_BIT_SHIFT);
1524 
1525 	ret = power_supply_get_battery_info(bq->charger, &bat_info);
1526 	if (ret == -ENOMEM)
1527 		return ret;
1528 
1529 	if (ret) {
1530 		dev_warn(bq->dev, "battery info missing, default values will be applied\n");
1531 
1532 		bat_info->constant_charge_current_max_ua =
1533 				bq->chip_info->bq256xx_def_ichg;
1534 
1535 		bat_info->constant_charge_voltage_max_uv =
1536 				bq->chip_info->bq256xx_def_vbatreg;
1537 
1538 		bat_info->precharge_current_ua =
1539 				bq->chip_info->bq256xx_def_iprechg;
1540 
1541 		bat_info->charge_term_current_ua =
1542 				bq->chip_info->bq256xx_def_iterm;
1543 
1544 		bq->init_data.ichg_max =
1545 				bq->chip_info->bq256xx_max_ichg;
1546 
1547 		bq->init_data.vbatreg_max =
1548 				bq->chip_info->bq256xx_max_vbatreg;
1549 	} else {
1550 		bq->init_data.ichg_max =
1551 			bat_info->constant_charge_current_max_ua;
1552 
1553 		bq->init_data.vbatreg_max =
1554 			bat_info->constant_charge_voltage_max_uv;
1555 	}
1556 
1557 	ret = bq->chip_info->bq256xx_set_vindpm(bq, bq->init_data.vindpm);
1558 	if (ret)
1559 		return ret;
1560 
1561 	ret = bq->chip_info->bq256xx_set_iindpm(bq, bq->init_data.iindpm);
1562 	if (ret)
1563 		return ret;
1564 
1565 	ret = bq->chip_info->bq256xx_set_ichg(bq,
1566 				bat_info->constant_charge_current_max_ua);
1567 	if (ret)
1568 		return ret;
1569 
1570 	ret = bq->chip_info->bq256xx_set_iprechg(bq,
1571 				bat_info->precharge_current_ua);
1572 	if (ret)
1573 		return ret;
1574 
1575 	ret = bq->chip_info->bq256xx_set_vbatreg(bq,
1576 				bat_info->constant_charge_voltage_max_uv);
1577 	if (ret)
1578 		return ret;
1579 
1580 	ret = bq->chip_info->bq256xx_set_iterm(bq,
1581 				bat_info->charge_term_current_ua);
1582 	if (ret)
1583 		return ret;
1584 
1585 	power_supply_put_battery_info(bq->charger, bat_info);
1586 
1587 	return 0;
1588 }
1589 
1590 static int bq256xx_parse_dt(struct bq256xx_device *bq,
1591 		struct power_supply_config *psy_cfg, struct device *dev)
1592 {
1593 	int ret = 0;
1594 
1595 	psy_cfg->drv_data = bq;
1596 	psy_cfg->of_node = dev->of_node;
1597 
1598 	ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
1599 				       &bq->watchdog_timer);
1600 	if (ret)
1601 		bq->watchdog_timer = BQ256XX_WATCHDOG_DIS;
1602 
1603 	if (bq->watchdog_timer > BQ256XX_WATCHDOG_MAX ||
1604 	    bq->watchdog_timer < BQ256XX_WATCHDOG_DIS)
1605 		return -EINVAL;
1606 
1607 	ret = device_property_read_u32(bq->dev,
1608 				       "input-voltage-limit-microvolt",
1609 				       &bq->init_data.vindpm);
1610 	if (ret)
1611 		bq->init_data.vindpm = bq->chip_info->bq256xx_def_vindpm;
1612 
1613 	ret = device_property_read_u32(bq->dev,
1614 				       "input-current-limit-microamp",
1615 				       &bq->init_data.iindpm);
1616 	if (ret)
1617 		bq->init_data.iindpm = bq->chip_info->bq256xx_def_iindpm;
1618 
1619 	return 0;
1620 }
1621 
1622 static int bq256xx_probe(struct i2c_client *client)
1623 {
1624 	const struct i2c_device_id *id = i2c_client_get_device_id(client);
1625 	struct device *dev = &client->dev;
1626 	struct bq256xx_device *bq;
1627 	struct power_supply_config psy_cfg = { };
1628 
1629 	int ret;
1630 
1631 	bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
1632 	if (!bq)
1633 		return -ENOMEM;
1634 
1635 	bq->client = client;
1636 	bq->dev = dev;
1637 	bq->chip_info = &bq256xx_chip_info_tbl[id->driver_data];
1638 
1639 	mutex_init(&bq->lock);
1640 
1641 	strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
1642 
1643 	bq->regmap = devm_regmap_init_i2c(client,
1644 					bq->chip_info->bq256xx_regmap_config);
1645 
1646 	if (IS_ERR(bq->regmap)) {
1647 		dev_err(dev, "Failed to allocate register map\n");
1648 		return PTR_ERR(bq->regmap);
1649 	}
1650 
1651 	i2c_set_clientdata(client, bq);
1652 
1653 	ret = bq256xx_parse_dt(bq, &psy_cfg, dev);
1654 	if (ret) {
1655 		dev_err(dev, "Failed to read device tree properties%d\n", ret);
1656 		return ret;
1657 	}
1658 
1659 	ret = devm_add_action_or_reset(dev, bq256xx_charger_reset, bq);
1660 	if (ret)
1661 		return ret;
1662 
1663 	/* OTG reporting */
1664 	bq->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
1665 	if (!IS_ERR_OR_NULL(bq->usb2_phy)) {
1666 		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
1667 		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
1668 		usb_register_notifier(bq->usb2_phy, &bq->usb_nb);
1669 	}
1670 
1671 	bq->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
1672 	if (!IS_ERR_OR_NULL(bq->usb3_phy)) {
1673 		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
1674 		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
1675 		usb_register_notifier(bq->usb3_phy, &bq->usb_nb);
1676 	}
1677 
1678 	if (client->irq) {
1679 		ret = devm_request_threaded_irq(dev, client->irq, NULL,
1680 						bq256xx_irq_handler_thread,
1681 						IRQF_TRIGGER_FALLING |
1682 						IRQF_ONESHOT,
1683 						dev_name(&client->dev), bq);
1684 		if (ret < 0) {
1685 			dev_err(dev, "get irq fail: %d\n", ret);
1686 			return ret;
1687 		}
1688 	}
1689 
1690 	ret = bq256xx_power_supply_init(bq, &psy_cfg, dev);
1691 	if (ret) {
1692 		dev_err(dev, "Failed to register power supply\n");
1693 		return ret;
1694 	}
1695 
1696 	ret = bq256xx_hw_init(bq);
1697 	if (ret) {
1698 		dev_err(dev, "Cannot initialize the chip.\n");
1699 		return ret;
1700 	}
1701 
1702 	return ret;
1703 }
1704 
1705 static const struct i2c_device_id bq256xx_i2c_ids[] = {
1706 	{ "bq25600", BQ25600 },
1707 	{ "bq25600d", BQ25600D },
1708 	{ "bq25601", BQ25601 },
1709 	{ "bq25601d", BQ25601D },
1710 	{ "bq25611d", BQ25611D },
1711 	{ "bq25618", BQ25618 },
1712 	{ "bq25619", BQ25619 },
1713 	{},
1714 };
1715 MODULE_DEVICE_TABLE(i2c, bq256xx_i2c_ids);
1716 
1717 static const struct of_device_id bq256xx_of_match[] = {
1718 	{ .compatible = "ti,bq25600", .data = (void *)BQ25600 },
1719 	{ .compatible = "ti,bq25600d", .data = (void *)BQ25600D },
1720 	{ .compatible = "ti,bq25601", .data = (void *)BQ25601 },
1721 	{ .compatible = "ti,bq25601d", .data = (void *)BQ25601D },
1722 	{ .compatible = "ti,bq25611d", .data = (void *)BQ25611D },
1723 	{ .compatible = "ti,bq25618", .data = (void *)BQ25618 },
1724 	{ .compatible = "ti,bq25619", .data = (void *)BQ25619 },
1725 	{ },
1726 };
1727 MODULE_DEVICE_TABLE(of, bq256xx_of_match);
1728 
1729 static const struct acpi_device_id bq256xx_acpi_match[] = {
1730 	{ "bq25600", BQ25600 },
1731 	{ "bq25600d", BQ25600D },
1732 	{ "bq25601", BQ25601 },
1733 	{ "bq25601d", BQ25601D },
1734 	{ "bq25611d", BQ25611D },
1735 	{ "bq25618", BQ25618 },
1736 	{ "bq25619", BQ25619 },
1737 	{},
1738 };
1739 MODULE_DEVICE_TABLE(acpi, bq256xx_acpi_match);
1740 
1741 static struct i2c_driver bq256xx_driver = {
1742 	.driver = {
1743 		.name = "bq256xx-charger",
1744 		.of_match_table = bq256xx_of_match,
1745 		.acpi_match_table = bq256xx_acpi_match,
1746 	},
1747 	.probe_new = bq256xx_probe,
1748 	.id_table = bq256xx_i2c_ids,
1749 };
1750 module_i2c_driver(bq256xx_driver);
1751 
1752 MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1753 MODULE_DESCRIPTION("bq256xx charger driver");
1754 MODULE_LICENSE("GPL v2");
1755