1 // SPDX-License-Identifier: GPL-2.0
2 // BQ25980 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/delay.h>
16 #include <linux/device.h>
17 #include <linux/moduleparam.h>
18 #include <linux/slab.h>
19 
20 #include "bq25980_charger.h"
21 
22 struct bq25980_state {
23 	bool dischg;
24 	bool ovp;
25 	bool ocp;
26 	bool wdt;
27 	bool tflt;
28 	bool online;
29 	bool ce;
30 	bool hiz;
31 	bool bypass;
32 
33 	u32 vbat_adc;
34 	u32 vsys_adc;
35 	u32 ibat_adc;
36 };
37 
38 enum bq25980_id {
39 	BQ25980,
40 	BQ25975,
41 	BQ25960,
42 };
43 
44 struct bq25980_chip_info {
45 
46 	int model_id;
47 
48 	const struct regmap_config *regmap_config;
49 
50 	int busocp_def;
51 	int busocp_sc_max;
52 	int busocp_byp_max;
53 	int busocp_sc_min;
54 	int busocp_byp_min;
55 
56 	int busovp_sc_def;
57 	int busovp_byp_def;
58 	int busovp_sc_step;
59 
60 	int busovp_sc_offset;
61 	int busovp_byp_step;
62 	int busovp_byp_offset;
63 	int busovp_sc_min;
64 	int busovp_sc_max;
65 	int busovp_byp_min;
66 	int busovp_byp_max;
67 
68 	int batovp_def;
69 	int batovp_max;
70 	int batovp_min;
71 	int batovp_step;
72 	int batovp_offset;
73 
74 	int batocp_def;
75 	int batocp_max;
76 };
77 
78 struct bq25980_init_data {
79 	u32 ichg;
80 	u32 bypass_ilim;
81 	u32 sc_ilim;
82 	u32 vreg;
83 	u32 iterm;
84 	u32 iprechg;
85 	u32 bypass_vlim;
86 	u32 sc_vlim;
87 	u32 ichg_max;
88 	u32 vreg_max;
89 };
90 
91 struct bq25980_device {
92 	struct i2c_client *client;
93 	struct device *dev;
94 	struct power_supply *charger;
95 	struct power_supply *battery;
96 	struct mutex lock;
97 	struct regmap *regmap;
98 
99 	char model_name[I2C_NAME_SIZE];
100 
101 	struct bq25980_init_data init_data;
102 	const struct bq25980_chip_info *chip_info;
103 	struct bq25980_state state;
104 	int watchdog_timer;
105 };
106 
107 static struct reg_default bq25980_reg_defs[] = {
108 	{BQ25980_BATOVP, 0x5A},
109 	{BQ25980_BATOVP_ALM, 0x46},
110 	{BQ25980_BATOCP, 0x51},
111 	{BQ25980_BATOCP_ALM, 0x50},
112 	{BQ25980_BATUCP_ALM, 0x28},
113 	{BQ25980_CHRGR_CTRL_1, 0x0},
114 	{BQ25980_BUSOVP, 0x26},
115 	{BQ25980_BUSOVP_ALM, 0x22},
116 	{BQ25980_BUSOCP, 0xD},
117 	{BQ25980_BUSOCP_ALM, 0xC},
118 	{BQ25980_TEMP_CONTROL, 0x30},
119 	{BQ25980_TDIE_ALM, 0xC8},
120 	{BQ25980_TSBUS_FLT, 0x15},
121 	{BQ25980_TSBAT_FLG, 0x15},
122 	{BQ25980_VAC_CONTROL, 0x0},
123 	{BQ25980_CHRGR_CTRL_2, 0x0},
124 	{BQ25980_CHRGR_CTRL_3, 0x20},
125 	{BQ25980_CHRGR_CTRL_4, 0x1D},
126 	{BQ25980_CHRGR_CTRL_5, 0x18},
127 	{BQ25980_STAT1, 0x0},
128 	{BQ25980_STAT2, 0x0},
129 	{BQ25980_STAT3, 0x0},
130 	{BQ25980_STAT4, 0x0},
131 	{BQ25980_STAT5, 0x0},
132 	{BQ25980_FLAG1, 0x0},
133 	{BQ25980_FLAG2, 0x0},
134 	{BQ25980_FLAG3, 0x0},
135 	{BQ25980_FLAG4, 0x0},
136 	{BQ25980_FLAG5, 0x0},
137 	{BQ25980_MASK1, 0x0},
138 	{BQ25980_MASK2, 0x0},
139 	{BQ25980_MASK3, 0x0},
140 	{BQ25980_MASK4, 0x0},
141 	{BQ25980_MASK5, 0x0},
142 	{BQ25980_DEVICE_INFO, 0x8},
143 	{BQ25980_ADC_CONTROL1, 0x0},
144 	{BQ25980_ADC_CONTROL2, 0x0},
145 	{BQ25980_IBUS_ADC_LSB, 0x0},
146 	{BQ25980_IBUS_ADC_MSB, 0x0},
147 	{BQ25980_VBUS_ADC_LSB, 0x0},
148 	{BQ25980_VBUS_ADC_MSB, 0x0},
149 	{BQ25980_VAC1_ADC_LSB, 0x0},
150 	{BQ25980_VAC2_ADC_LSB, 0x0},
151 	{BQ25980_VOUT_ADC_LSB, 0x0},
152 	{BQ25980_VBAT_ADC_LSB, 0x0},
153 	{BQ25980_IBAT_ADC_MSB, 0x0},
154 	{BQ25980_IBAT_ADC_LSB, 0x0},
155 	{BQ25980_TSBUS_ADC_LSB, 0x0},
156 	{BQ25980_TSBAT_ADC_LSB, 0x0},
157 	{BQ25980_TDIE_ADC_LSB, 0x0},
158 	{BQ25980_DEGLITCH_TIME, 0x0},
159 	{BQ25980_CHRGR_CTRL_6, 0x0},
160 };
161 
162 static struct reg_default bq25975_reg_defs[] = {
163 	{BQ25980_BATOVP, 0x5A},
164 	{BQ25980_BATOVP_ALM, 0x46},
165 	{BQ25980_BATOCP, 0x51},
166 	{BQ25980_BATOCP_ALM, 0x50},
167 	{BQ25980_BATUCP_ALM, 0x28},
168 	{BQ25980_CHRGR_CTRL_1, 0x0},
169 	{BQ25980_BUSOVP, 0x26},
170 	{BQ25980_BUSOVP_ALM, 0x22},
171 	{BQ25980_BUSOCP, 0xD},
172 	{BQ25980_BUSOCP_ALM, 0xC},
173 	{BQ25980_TEMP_CONTROL, 0x30},
174 	{BQ25980_TDIE_ALM, 0xC8},
175 	{BQ25980_TSBUS_FLT, 0x15},
176 	{BQ25980_TSBAT_FLG, 0x15},
177 	{BQ25980_VAC_CONTROL, 0x0},
178 	{BQ25980_CHRGR_CTRL_2, 0x0},
179 	{BQ25980_CHRGR_CTRL_3, 0x20},
180 	{BQ25980_CHRGR_CTRL_4, 0x1D},
181 	{BQ25980_CHRGR_CTRL_5, 0x18},
182 	{BQ25980_STAT1, 0x0},
183 	{BQ25980_STAT2, 0x0},
184 	{BQ25980_STAT3, 0x0},
185 	{BQ25980_STAT4, 0x0},
186 	{BQ25980_STAT5, 0x0},
187 	{BQ25980_FLAG1, 0x0},
188 	{BQ25980_FLAG2, 0x0},
189 	{BQ25980_FLAG3, 0x0},
190 	{BQ25980_FLAG4, 0x0},
191 	{BQ25980_FLAG5, 0x0},
192 	{BQ25980_MASK1, 0x0},
193 	{BQ25980_MASK2, 0x0},
194 	{BQ25980_MASK3, 0x0},
195 	{BQ25980_MASK4, 0x0},
196 	{BQ25980_MASK5, 0x0},
197 	{BQ25980_DEVICE_INFO, 0x8},
198 	{BQ25980_ADC_CONTROL1, 0x0},
199 	{BQ25980_ADC_CONTROL2, 0x0},
200 	{BQ25980_IBUS_ADC_LSB, 0x0},
201 	{BQ25980_IBUS_ADC_MSB, 0x0},
202 	{BQ25980_VBUS_ADC_LSB, 0x0},
203 	{BQ25980_VBUS_ADC_MSB, 0x0},
204 	{BQ25980_VAC1_ADC_LSB, 0x0},
205 	{BQ25980_VAC2_ADC_LSB, 0x0},
206 	{BQ25980_VOUT_ADC_LSB, 0x0},
207 	{BQ25980_VBAT_ADC_LSB, 0x0},
208 	{BQ25980_IBAT_ADC_MSB, 0x0},
209 	{BQ25980_IBAT_ADC_LSB, 0x0},
210 	{BQ25980_TSBUS_ADC_LSB, 0x0},
211 	{BQ25980_TSBAT_ADC_LSB, 0x0},
212 	{BQ25980_TDIE_ADC_LSB, 0x0},
213 	{BQ25980_DEGLITCH_TIME, 0x0},
214 	{BQ25980_CHRGR_CTRL_6, 0x0},
215 };
216 
217 static struct reg_default bq25960_reg_defs[] = {
218 	{BQ25980_BATOVP, 0x5A},
219 	{BQ25980_BATOVP_ALM, 0x46},
220 	{BQ25980_BATOCP, 0x51},
221 	{BQ25980_BATOCP_ALM, 0x50},
222 	{BQ25980_BATUCP_ALM, 0x28},
223 	{BQ25980_CHRGR_CTRL_1, 0x0},
224 	{BQ25980_BUSOVP, 0x26},
225 	{BQ25980_BUSOVP_ALM, 0x22},
226 	{BQ25980_BUSOCP, 0xD},
227 	{BQ25980_BUSOCP_ALM, 0xC},
228 	{BQ25980_TEMP_CONTROL, 0x30},
229 	{BQ25980_TDIE_ALM, 0xC8},
230 	{BQ25980_TSBUS_FLT, 0x15},
231 	{BQ25980_TSBAT_FLG, 0x15},
232 	{BQ25980_VAC_CONTROL, 0x0},
233 	{BQ25980_CHRGR_CTRL_2, 0x0},
234 	{BQ25980_CHRGR_CTRL_3, 0x20},
235 	{BQ25980_CHRGR_CTRL_4, 0x1D},
236 	{BQ25980_CHRGR_CTRL_5, 0x18},
237 	{BQ25980_STAT1, 0x0},
238 	{BQ25980_STAT2, 0x0},
239 	{BQ25980_STAT3, 0x0},
240 	{BQ25980_STAT4, 0x0},
241 	{BQ25980_STAT5, 0x0},
242 	{BQ25980_FLAG1, 0x0},
243 	{BQ25980_FLAG2, 0x0},
244 	{BQ25980_FLAG3, 0x0},
245 	{BQ25980_FLAG4, 0x0},
246 	{BQ25980_FLAG5, 0x0},
247 	{BQ25980_MASK1, 0x0},
248 	{BQ25980_MASK2, 0x0},
249 	{BQ25980_MASK3, 0x0},
250 	{BQ25980_MASK4, 0x0},
251 	{BQ25980_MASK5, 0x0},
252 	{BQ25980_DEVICE_INFO, 0x8},
253 	{BQ25980_ADC_CONTROL1, 0x0},
254 	{BQ25980_ADC_CONTROL2, 0x0},
255 	{BQ25980_IBUS_ADC_LSB, 0x0},
256 	{BQ25980_IBUS_ADC_MSB, 0x0},
257 	{BQ25980_VBUS_ADC_LSB, 0x0},
258 	{BQ25980_VBUS_ADC_MSB, 0x0},
259 	{BQ25980_VAC1_ADC_LSB, 0x0},
260 	{BQ25980_VAC2_ADC_LSB, 0x0},
261 	{BQ25980_VOUT_ADC_LSB, 0x0},
262 	{BQ25980_VBAT_ADC_LSB, 0x0},
263 	{BQ25980_IBAT_ADC_MSB, 0x0},
264 	{BQ25980_IBAT_ADC_LSB, 0x0},
265 	{BQ25980_TSBUS_ADC_LSB, 0x0},
266 	{BQ25980_TSBAT_ADC_LSB, 0x0},
267 	{BQ25980_TDIE_ADC_LSB, 0x0},
268 	{BQ25980_DEGLITCH_TIME, 0x0},
269 	{BQ25980_CHRGR_CTRL_6, 0x0},
270 };
271 
272 static int bq25980_watchdog_time[BQ25980_NUM_WD_VAL] = {5000, 10000, 50000,
273 							300000};
274 
bq25980_get_input_curr_lim(struct bq25980_device * bq)275 static int bq25980_get_input_curr_lim(struct bq25980_device *bq)
276 {
277 	unsigned int busocp_reg_code;
278 	int ret;
279 
280 	ret = regmap_read(bq->regmap, BQ25980_BUSOCP, &busocp_reg_code);
281 	if (ret)
282 		return ret;
283 
284 	return (busocp_reg_code * BQ25980_BUSOCP_STEP_uA) + BQ25980_BUSOCP_OFFSET_uA;
285 }
286 
bq25980_set_hiz(struct bq25980_device * bq,int setting)287 static int bq25980_set_hiz(struct bq25980_device *bq, int setting)
288 {
289 	return regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
290 			BQ25980_EN_HIZ, setting);
291 }
292 
bq25980_set_input_curr_lim(struct bq25980_device * bq,int busocp)293 static int bq25980_set_input_curr_lim(struct bq25980_device *bq, int busocp)
294 {
295 	unsigned int busocp_reg_code;
296 	int ret;
297 
298 	if (!busocp)
299 		return bq25980_set_hiz(bq, BQ25980_ENABLE_HIZ);
300 
301 	bq25980_set_hiz(bq, BQ25980_DISABLE_HIZ);
302 
303 	if (busocp < BQ25980_BUSOCP_MIN_uA)
304 		busocp = BQ25980_BUSOCP_MIN_uA;
305 
306 	if (bq->state.bypass)
307 		busocp = min(busocp, bq->chip_info->busocp_sc_max);
308 	else
309 		busocp = min(busocp, bq->chip_info->busocp_byp_max);
310 
311 	busocp_reg_code = (busocp - BQ25980_BUSOCP_OFFSET_uA)
312 						/ BQ25980_BUSOCP_STEP_uA;
313 
314 	ret = regmap_write(bq->regmap, BQ25980_BUSOCP, busocp_reg_code);
315 	if (ret)
316 		return ret;
317 
318 	return regmap_write(bq->regmap, BQ25980_BUSOCP_ALM, busocp_reg_code);
319 }
320 
bq25980_get_input_volt_lim(struct bq25980_device * bq)321 static int bq25980_get_input_volt_lim(struct bq25980_device *bq)
322 {
323 	unsigned int busovp_reg_code;
324 	unsigned int busovp_offset;
325 	unsigned int busovp_step;
326 	int ret;
327 
328 	if (bq->state.bypass) {
329 		busovp_step = bq->chip_info->busovp_byp_step;
330 		busovp_offset = bq->chip_info->busovp_byp_offset;
331 	} else {
332 		busovp_step = bq->chip_info->busovp_sc_step;
333 		busovp_offset = bq->chip_info->busovp_sc_offset;
334 	}
335 
336 	ret = regmap_read(bq->regmap, BQ25980_BUSOVP, &busovp_reg_code);
337 	if (ret)
338 		return ret;
339 
340 	return (busovp_reg_code * busovp_step) + busovp_offset;
341 }
342 
bq25980_set_input_volt_lim(struct bq25980_device * bq,int busovp)343 static int bq25980_set_input_volt_lim(struct bq25980_device *bq, int busovp)
344 {
345 	unsigned int busovp_reg_code;
346 	unsigned int busovp_step;
347 	unsigned int busovp_offset;
348 	int ret;
349 
350 	if (bq->state.bypass) {
351 		busovp_step = bq->chip_info->busovp_byp_step;
352 		busovp_offset = bq->chip_info->busovp_byp_offset;
353 		if (busovp > bq->chip_info->busovp_byp_max)
354 			busovp = bq->chip_info->busovp_byp_max;
355 		else if (busovp < bq->chip_info->busovp_byp_min)
356 			busovp = bq->chip_info->busovp_byp_min;
357 	} else {
358 		busovp_step = bq->chip_info->busovp_sc_step;
359 		busovp_offset = bq->chip_info->busovp_sc_offset;
360 		if (busovp > bq->chip_info->busovp_sc_max)
361 			busovp = bq->chip_info->busovp_sc_max;
362 		else if (busovp < bq->chip_info->busovp_sc_min)
363 			busovp = bq->chip_info->busovp_sc_min;
364 	}
365 
366 	busovp_reg_code = (busovp - busovp_offset) / busovp_step;
367 
368 	ret = regmap_write(bq->regmap, BQ25980_BUSOVP, busovp_reg_code);
369 	if (ret)
370 		return ret;
371 
372 	return regmap_write(bq->regmap, BQ25980_BUSOVP_ALM, busovp_reg_code);
373 }
374 
bq25980_get_const_charge_curr(struct bq25980_device * bq)375 static int bq25980_get_const_charge_curr(struct bq25980_device *bq)
376 {
377 	unsigned int batocp_reg_code;
378 	int ret;
379 
380 	ret = regmap_read(bq->regmap, BQ25980_BATOCP, &batocp_reg_code);
381 	if (ret)
382 		return ret;
383 
384 	return (batocp_reg_code & BQ25980_BATOCP_MASK) *
385 						BQ25980_BATOCP_STEP_uA;
386 }
387 
bq25980_set_const_charge_curr(struct bq25980_device * bq,int batocp)388 static int bq25980_set_const_charge_curr(struct bq25980_device *bq, int batocp)
389 {
390 	unsigned int batocp_reg_code;
391 	int ret;
392 
393 	batocp = max(batocp, BQ25980_BATOCP_MIN_uA);
394 	batocp = min(batocp, bq->chip_info->batocp_max);
395 
396 	batocp_reg_code = batocp / BQ25980_BATOCP_STEP_uA;
397 
398 	ret = regmap_update_bits(bq->regmap, BQ25980_BATOCP,
399 				BQ25980_BATOCP_MASK, batocp_reg_code);
400 	if (ret)
401 		return ret;
402 
403 	return regmap_update_bits(bq->regmap, BQ25980_BATOCP_ALM,
404 				BQ25980_BATOCP_MASK, batocp_reg_code);
405 }
406 
bq25980_get_const_charge_volt(struct bq25980_device * bq)407 static int bq25980_get_const_charge_volt(struct bq25980_device *bq)
408 {
409 	unsigned int batovp_reg_code;
410 	int ret;
411 
412 	ret = regmap_read(bq->regmap, BQ25980_BATOVP, &batovp_reg_code);
413 	if (ret)
414 		return ret;
415 
416 	return ((batovp_reg_code * bq->chip_info->batovp_step) +
417 			bq->chip_info->batovp_offset);
418 }
419 
bq25980_set_const_charge_volt(struct bq25980_device * bq,int batovp)420 static int bq25980_set_const_charge_volt(struct bq25980_device *bq, int batovp)
421 {
422 	unsigned int batovp_reg_code;
423 	int ret;
424 
425 	if (batovp < bq->chip_info->batovp_min)
426 		batovp = bq->chip_info->batovp_min;
427 
428 	if (batovp > bq->chip_info->batovp_max)
429 		batovp = bq->chip_info->batovp_max;
430 
431 	batovp_reg_code = (batovp - bq->chip_info->batovp_offset) /
432 						bq->chip_info->batovp_step;
433 
434 	ret = regmap_write(bq->regmap, BQ25980_BATOVP, batovp_reg_code);
435 	if (ret)
436 		return ret;
437 
438 	return regmap_write(bq->regmap, BQ25980_BATOVP_ALM, batovp_reg_code);
439 }
440 
bq25980_set_bypass(struct bq25980_device * bq,bool en_bypass)441 static int bq25980_set_bypass(struct bq25980_device *bq, bool en_bypass)
442 {
443 	int ret;
444 
445 	if (en_bypass)
446 		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
447 					BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
448 	else
449 		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
450 					BQ25980_EN_BYPASS, en_bypass);
451 	if (ret)
452 		return ret;
453 
454 	bq->state.bypass = en_bypass;
455 
456 	return bq->state.bypass;
457 }
458 
bq25980_set_chg_en(struct bq25980_device * bq,bool en_chg)459 static int bq25980_set_chg_en(struct bq25980_device *bq, bool en_chg)
460 {
461 	int ret;
462 
463 	if (en_chg)
464 		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
465 					BQ25980_CHG_EN, BQ25980_CHG_EN);
466 	else
467 		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
468 					BQ25980_CHG_EN, en_chg);
469 	if (ret)
470 		return ret;
471 
472 	bq->state.ce = en_chg;
473 
474 	return 0;
475 }
476 
bq25980_get_adc_ibus(struct bq25980_device * bq)477 static int bq25980_get_adc_ibus(struct bq25980_device *bq)
478 {
479 	int ibus_adc_lsb, ibus_adc_msb;
480 	u16 ibus_adc;
481 	int ret;
482 
483 	ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_MSB, &ibus_adc_msb);
484 	if (ret)
485 		return ret;
486 
487 	ret = regmap_read(bq->regmap, BQ25980_IBUS_ADC_LSB, &ibus_adc_lsb);
488 	if (ret)
489 		return ret;
490 
491 	ibus_adc = (ibus_adc_msb << 8) | ibus_adc_lsb;
492 
493 	if (ibus_adc_msb & BQ25980_ADC_POLARITY_BIT)
494 		return ((ibus_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
495 
496 	return ibus_adc * BQ25980_ADC_CURR_STEP_uA;
497 }
498 
bq25980_get_adc_vbus(struct bq25980_device * bq)499 static int bq25980_get_adc_vbus(struct bq25980_device *bq)
500 {
501 	int vbus_adc_lsb, vbus_adc_msb;
502 	u16 vbus_adc;
503 	int ret;
504 
505 	ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_MSB, &vbus_adc_msb);
506 	if (ret)
507 		return ret;
508 
509 	ret = regmap_read(bq->regmap, BQ25980_VBUS_ADC_LSB, &vbus_adc_lsb);
510 	if (ret)
511 		return ret;
512 
513 	vbus_adc = (vbus_adc_msb << 8) | vbus_adc_lsb;
514 
515 	return vbus_adc * BQ25980_ADC_VOLT_STEP_uV;
516 }
517 
bq25980_get_ibat_adc(struct bq25980_device * bq)518 static int bq25980_get_ibat_adc(struct bq25980_device *bq)
519 {
520 	int ret;
521 	int ibat_adc_lsb, ibat_adc_msb;
522 	int ibat_adc;
523 
524 	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
525 	if (ret)
526 		return ret;
527 
528 	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_LSB, &ibat_adc_lsb);
529 	if (ret)
530 		return ret;
531 
532 	ibat_adc = (ibat_adc_msb << 8) | ibat_adc_lsb;
533 
534 	if (ibat_adc_msb & BQ25980_ADC_POLARITY_BIT)
535 		return ((ibat_adc ^ 0xffff) + 1) * BQ25980_ADC_CURR_STEP_uA;
536 
537 	return ibat_adc * BQ25980_ADC_CURR_STEP_uA;
538 }
539 
bq25980_get_adc_vbat(struct bq25980_device * bq)540 static int bq25980_get_adc_vbat(struct bq25980_device *bq)
541 {
542 	int vsys_adc_lsb, vsys_adc_msb;
543 	u16 vsys_adc;
544 	int ret;
545 
546 	ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_MSB, &vsys_adc_msb);
547 	if (ret)
548 		return ret;
549 
550 	ret = regmap_read(bq->regmap, BQ25980_VBAT_ADC_LSB, &vsys_adc_lsb);
551 	if (ret)
552 		return ret;
553 
554 	vsys_adc = (vsys_adc_msb << 8) | vsys_adc_lsb;
555 
556 	return vsys_adc * BQ25980_ADC_VOLT_STEP_uV;
557 }
558 
bq25980_get_state(struct bq25980_device * bq,struct bq25980_state * state)559 static int bq25980_get_state(struct bq25980_device *bq,
560 				struct bq25980_state *state)
561 {
562 	unsigned int chg_ctrl_2;
563 	unsigned int stat1;
564 	unsigned int stat2;
565 	unsigned int stat3;
566 	unsigned int stat4;
567 	unsigned int ibat_adc_msb;
568 	int ret;
569 
570 	ret = regmap_read(bq->regmap, BQ25980_STAT1, &stat1);
571 	if (ret)
572 		return ret;
573 
574 	ret = regmap_read(bq->regmap, BQ25980_STAT2, &stat2);
575 	if (ret)
576 		return ret;
577 
578 	ret = regmap_read(bq->regmap, BQ25980_STAT3, &stat3);
579 	if (ret)
580 		return ret;
581 
582 	ret = regmap_read(bq->regmap, BQ25980_STAT4, &stat4);
583 	if (ret)
584 		return ret;
585 
586 	ret = regmap_read(bq->regmap, BQ25980_CHRGR_CTRL_2, &chg_ctrl_2);
587 	if (ret)
588 		return ret;
589 
590 	ret = regmap_read(bq->regmap, BQ25980_IBAT_ADC_MSB, &ibat_adc_msb);
591 	if (ret)
592 		return ret;
593 
594 	state->dischg = ibat_adc_msb & BQ25980_ADC_POLARITY_BIT;
595 	state->ovp = (stat1 & BQ25980_STAT1_OVP_MASK) |
596 		(stat3 & BQ25980_STAT3_OVP_MASK);
597 	state->ocp = (stat1 & BQ25980_STAT1_OCP_MASK) |
598 		(stat2 & BQ25980_STAT2_OCP_MASK);
599 	state->tflt = stat4 & BQ25980_STAT4_TFLT_MASK;
600 	state->wdt = stat4 & BQ25980_WD_STAT;
601 	state->online = stat3 & BQ25980_PRESENT_MASK;
602 	state->ce = chg_ctrl_2 & BQ25980_CHG_EN;
603 	state->hiz = chg_ctrl_2 & BQ25980_EN_HIZ;
604 	state->bypass = chg_ctrl_2 & BQ25980_EN_BYPASS;
605 
606 	return 0;
607 }
608 
bq25980_get_battery_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)609 static int bq25980_get_battery_property(struct power_supply *psy,
610 				enum power_supply_property psp,
611 				union power_supply_propval *val)
612 {
613 	struct bq25980_device *bq = power_supply_get_drvdata(psy);
614 	int ret = 0;
615 
616 	switch (psp) {
617 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
618 		val->intval = bq->init_data.ichg_max;
619 		break;
620 
621 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
622 		val->intval = bq->init_data.vreg_max;
623 		break;
624 
625 	case POWER_SUPPLY_PROP_CURRENT_NOW:
626 		ret = bq25980_get_ibat_adc(bq);
627 		val->intval = ret;
628 		break;
629 
630 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
631 		ret = bq25980_get_adc_vbat(bq);
632 		if (ret < 0)
633 			return ret;
634 
635 		val->intval = ret;
636 		break;
637 
638 	default:
639 		return -EINVAL;
640 	}
641 
642 	return ret;
643 }
644 
bq25980_set_charger_property(struct power_supply * psy,enum power_supply_property prop,const union power_supply_propval * val)645 static int bq25980_set_charger_property(struct power_supply *psy,
646 		enum power_supply_property prop,
647 		const union power_supply_propval *val)
648 {
649 	struct bq25980_device *bq = power_supply_get_drvdata(psy);
650 	int ret = -EINVAL;
651 
652 	switch (prop) {
653 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
654 		ret = bq25980_set_input_curr_lim(bq, val->intval);
655 		if (ret)
656 			return ret;
657 		break;
658 
659 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
660 		ret = bq25980_set_input_volt_lim(bq, val->intval);
661 		if (ret)
662 			return ret;
663 		break;
664 
665 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
666 		ret = bq25980_set_bypass(bq, val->intval);
667 		if (ret)
668 			return ret;
669 		break;
670 
671 	case POWER_SUPPLY_PROP_STATUS:
672 		ret = bq25980_set_chg_en(bq, val->intval);
673 		if (ret)
674 			return ret;
675 		break;
676 
677 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
678 		ret = bq25980_set_const_charge_curr(bq, val->intval);
679 		if (ret)
680 			return ret;
681 		break;
682 
683 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
684 		ret = bq25980_set_const_charge_volt(bq, val->intval);
685 		if (ret)
686 			return ret;
687 		break;
688 
689 	default:
690 		return -EINVAL;
691 	}
692 
693 	return ret;
694 }
695 
bq25980_get_charger_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)696 static int bq25980_get_charger_property(struct power_supply *psy,
697 				enum power_supply_property psp,
698 				union power_supply_propval *val)
699 {
700 	struct bq25980_device *bq = power_supply_get_drvdata(psy);
701 	struct bq25980_state state;
702 	int ret = 0;
703 
704 	mutex_lock(&bq->lock);
705 	ret = bq25980_get_state(bq, &state);
706 	mutex_unlock(&bq->lock);
707 	if (ret)
708 		return ret;
709 
710 	switch (psp) {
711 	case POWER_SUPPLY_PROP_MANUFACTURER:
712 		val->strval = BQ25980_MANUFACTURER;
713 		break;
714 	case POWER_SUPPLY_PROP_MODEL_NAME:
715 		val->strval = bq->model_name;
716 		break;
717 	case POWER_SUPPLY_PROP_ONLINE:
718 		val->intval = state.online;
719 		break;
720 
721 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
722 		ret = bq25980_get_input_volt_lim(bq);
723 		if (ret < 0)
724 			return ret;
725 		val->intval = ret;
726 		break;
727 
728 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
729 		ret = bq25980_get_input_curr_lim(bq);
730 		if (ret < 0)
731 			return ret;
732 
733 		val->intval = ret;
734 		break;
735 
736 	case POWER_SUPPLY_PROP_HEALTH:
737 		val->intval = POWER_SUPPLY_HEALTH_GOOD;
738 
739 		if (state.tflt)
740 			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
741 		else if (state.ovp)
742 			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
743 		else if (state.ocp)
744 			val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
745 		else if (state.wdt)
746 			val->intval =
747 				POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
748 		break;
749 
750 	case POWER_SUPPLY_PROP_STATUS:
751 		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
752 
753 		if ((state.ce) && (!state.hiz))
754 			val->intval = POWER_SUPPLY_STATUS_CHARGING;
755 		else if (state.dischg)
756 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
757 		else if (!state.ce)
758 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
759 		break;
760 
761 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
762 		val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
763 
764 		if (!state.ce)
765 			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
766 		else if (state.bypass)
767 			val->intval = POWER_SUPPLY_CHARGE_TYPE_BYPASS;
768 		else if (!state.bypass)
769 			val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
770 		break;
771 
772 	case POWER_SUPPLY_PROP_CURRENT_NOW:
773 		ret = bq25980_get_adc_ibus(bq);
774 		if (ret < 0)
775 			return ret;
776 
777 		val->intval = ret;
778 		break;
779 
780 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
781 		ret = bq25980_get_adc_vbus(bq);
782 		if (ret < 0)
783 			return ret;
784 
785 		val->intval = ret;
786 		break;
787 
788 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
789 		ret = bq25980_get_const_charge_curr(bq);
790 		if (ret < 0)
791 			return ret;
792 
793 		val->intval = ret;
794 		break;
795 
796 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
797 		ret = bq25980_get_const_charge_volt(bq);
798 		if (ret < 0)
799 			return ret;
800 
801 		val->intval = ret;
802 		break;
803 
804 	default:
805 		return -EINVAL;
806 	}
807 
808 	return ret;
809 }
810 
bq25980_state_changed(struct bq25980_device * bq,struct bq25980_state * new_state)811 static bool bq25980_state_changed(struct bq25980_device *bq,
812 				  struct bq25980_state *new_state)
813 {
814 	struct bq25980_state old_state;
815 
816 	mutex_lock(&bq->lock);
817 	old_state = bq->state;
818 	mutex_unlock(&bq->lock);
819 
820 	return (old_state.dischg != new_state->dischg ||
821 		old_state.ovp != new_state->ovp ||
822 		old_state.ocp != new_state->ocp ||
823 		old_state.online != new_state->online ||
824 		old_state.wdt != new_state->wdt ||
825 		old_state.tflt != new_state->tflt ||
826 		old_state.ce != new_state->ce ||
827 		old_state.hiz != new_state->hiz ||
828 		old_state.bypass != new_state->bypass);
829 }
830 
bq25980_irq_handler_thread(int irq,void * private)831 static irqreturn_t bq25980_irq_handler_thread(int irq, void *private)
832 {
833 	struct bq25980_device *bq = private;
834 	struct bq25980_state state;
835 	int ret;
836 
837 	ret = bq25980_get_state(bq, &state);
838 	if (ret < 0)
839 		goto irq_out;
840 
841 	if (!bq25980_state_changed(bq, &state))
842 		goto irq_out;
843 
844 	mutex_lock(&bq->lock);
845 	bq->state = state;
846 	mutex_unlock(&bq->lock);
847 
848 	power_supply_changed(bq->charger);
849 
850 irq_out:
851 	return IRQ_HANDLED;
852 }
853 
854 static enum power_supply_property bq25980_power_supply_props[] = {
855 	POWER_SUPPLY_PROP_MANUFACTURER,
856 	POWER_SUPPLY_PROP_MODEL_NAME,
857 	POWER_SUPPLY_PROP_STATUS,
858 	POWER_SUPPLY_PROP_ONLINE,
859 	POWER_SUPPLY_PROP_HEALTH,
860 	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
861 	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
862 	POWER_SUPPLY_PROP_CHARGE_TYPE,
863 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
864 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
865 	POWER_SUPPLY_PROP_CURRENT_NOW,
866 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
867 };
868 
869 static enum power_supply_property bq25980_battery_props[] = {
870 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
871 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
872 	POWER_SUPPLY_PROP_CURRENT_NOW,
873 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
874 };
875 
876 static char *bq25980_charger_supplied_to[] = {
877 	"main-battery",
878 };
879 
bq25980_property_is_writeable(struct power_supply * psy,enum power_supply_property prop)880 static int bq25980_property_is_writeable(struct power_supply *psy,
881 					 enum power_supply_property prop)
882 {
883 	switch (prop) {
884 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
885 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
886 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
887 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
888 	case POWER_SUPPLY_PROP_STATUS:
889 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
890 		return true;
891 	default:
892 		return false;
893 	}
894 }
895 
896 static const struct power_supply_desc bq25980_power_supply_desc = {
897 	.name = "bq25980-charger",
898 	.type = POWER_SUPPLY_TYPE_MAINS,
899 	.properties = bq25980_power_supply_props,
900 	.num_properties = ARRAY_SIZE(bq25980_power_supply_props),
901 	.get_property = bq25980_get_charger_property,
902 	.set_property = bq25980_set_charger_property,
903 	.property_is_writeable = bq25980_property_is_writeable,
904 };
905 
906 static struct power_supply_desc bq25980_battery_desc = {
907 	.name			= "bq25980-battery",
908 	.type			= POWER_SUPPLY_TYPE_BATTERY,
909 	.get_property		= bq25980_get_battery_property,
910 	.properties		= bq25980_battery_props,
911 	.num_properties		= ARRAY_SIZE(bq25980_battery_props),
912 	.property_is_writeable	= bq25980_property_is_writeable,
913 };
914 
915 
bq25980_is_volatile_reg(struct device * dev,unsigned int reg)916 static bool bq25980_is_volatile_reg(struct device *dev, unsigned int reg)
917 {
918 	switch (reg) {
919 	case BQ25980_CHRGR_CTRL_2:
920 	case BQ25980_STAT1...BQ25980_FLAG5:
921 	case BQ25980_ADC_CONTROL1...BQ25980_TDIE_ADC_LSB:
922 		return true;
923 	default:
924 		return false;
925 	}
926 }
927 
928 static const struct regmap_config bq25980_regmap_config = {
929 	.reg_bits = 8,
930 	.val_bits = 8,
931 
932 	.max_register = BQ25980_CHRGR_CTRL_6,
933 	.reg_defaults	= bq25980_reg_defs,
934 	.num_reg_defaults = ARRAY_SIZE(bq25980_reg_defs),
935 	.cache_type = REGCACHE_RBTREE,
936 	.volatile_reg = bq25980_is_volatile_reg,
937 };
938 
939 static const struct regmap_config bq25975_regmap_config = {
940 	.reg_bits = 8,
941 	.val_bits = 8,
942 
943 	.max_register = BQ25980_CHRGR_CTRL_6,
944 	.reg_defaults	= bq25975_reg_defs,
945 	.num_reg_defaults = ARRAY_SIZE(bq25975_reg_defs),
946 	.cache_type = REGCACHE_RBTREE,
947 	.volatile_reg = bq25980_is_volatile_reg,
948 };
949 
950 static const struct regmap_config bq25960_regmap_config = {
951 	.reg_bits = 8,
952 	.val_bits = 8,
953 
954 	.max_register = BQ25980_CHRGR_CTRL_6,
955 	.reg_defaults	= bq25960_reg_defs,
956 	.num_reg_defaults = ARRAY_SIZE(bq25960_reg_defs),
957 	.cache_type = REGCACHE_RBTREE,
958 	.volatile_reg = bq25980_is_volatile_reg,
959 };
960 
961 static const struct bq25980_chip_info bq25980_chip_info_tbl[] = {
962 	[BQ25980] = {
963 		.model_id = BQ25980,
964 		.regmap_config = &bq25980_regmap_config,
965 
966 		.busocp_def = BQ25980_BUSOCP_DFLT_uA,
967 		.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
968 		.busocp_sc_max = BQ25980_BUSOCP_SC_MAX_uA,
969 		.busocp_byp_max = BQ25980_BUSOCP_BYP_MAX_uA,
970 		.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
971 
972 		.busovp_sc_def = BQ25980_BUSOVP_DFLT_uV,
973 		.busovp_byp_def = BQ25980_BUSOVP_BYPASS_DFLT_uV,
974 		.busovp_sc_step = BQ25980_BUSOVP_SC_STEP_uV,
975 		.busovp_sc_offset = BQ25980_BUSOVP_SC_OFFSET_uV,
976 		.busovp_byp_step = BQ25980_BUSOVP_BYP_STEP_uV,
977 		.busovp_byp_offset = BQ25980_BUSOVP_BYP_OFFSET_uV,
978 		.busovp_sc_min = BQ25980_BUSOVP_SC_MIN_uV,
979 		.busovp_sc_max = BQ25980_BUSOVP_SC_MAX_uV,
980 		.busovp_byp_min = BQ25980_BUSOVP_BYP_MIN_uV,
981 		.busovp_byp_max = BQ25980_BUSOVP_BYP_MAX_uV,
982 
983 		.batovp_def = BQ25980_BATOVP_DFLT_uV,
984 		.batovp_max = BQ25980_BATOVP_MAX_uV,
985 		.batovp_min = BQ25980_BATOVP_MIN_uV,
986 		.batovp_step = BQ25980_BATOVP_STEP_uV,
987 		.batovp_offset = BQ25980_BATOVP_OFFSET_uV,
988 
989 		.batocp_def = BQ25980_BATOCP_DFLT_uA,
990 		.batocp_max = BQ25980_BATOCP_MAX_uA,
991 	},
992 
993 	[BQ25975] = {
994 		.model_id = BQ25975,
995 		.regmap_config = &bq25975_regmap_config,
996 
997 		.busocp_def = BQ25975_BUSOCP_DFLT_uA,
998 		.busocp_sc_min = BQ25975_BUSOCP_SC_MAX_uA,
999 		.busocp_sc_max = BQ25975_BUSOCP_SC_MAX_uA,
1000 		.busocp_byp_min = BQ25980_BUSOCP_MIN_uA,
1001 		.busocp_byp_max = BQ25975_BUSOCP_BYP_MAX_uA,
1002 
1003 		.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1004 		.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1005 		.busovp_sc_step = BQ25975_BUSOVP_SC_STEP_uV,
1006 		.busovp_sc_offset = BQ25975_BUSOVP_SC_OFFSET_uV,
1007 		.busovp_byp_step = BQ25975_BUSOVP_BYP_STEP_uV,
1008 		.busovp_byp_offset = BQ25975_BUSOVP_BYP_OFFSET_uV,
1009 		.busovp_sc_min = BQ25975_BUSOVP_SC_MIN_uV,
1010 		.busovp_sc_max = BQ25975_BUSOVP_SC_MAX_uV,
1011 		.busovp_byp_min = BQ25975_BUSOVP_BYP_MIN_uV,
1012 		.busovp_byp_max = BQ25975_BUSOVP_BYP_MAX_uV,
1013 
1014 		.batovp_def = BQ25975_BATOVP_DFLT_uV,
1015 		.batovp_max = BQ25975_BATOVP_MAX_uV,
1016 		.batovp_min = BQ25975_BATOVP_MIN_uV,
1017 		.batovp_step = BQ25975_BATOVP_STEP_uV,
1018 		.batovp_offset = BQ25975_BATOVP_OFFSET_uV,
1019 
1020 		.batocp_def = BQ25980_BATOCP_DFLT_uA,
1021 		.batocp_max = BQ25980_BATOCP_MAX_uA,
1022 	},
1023 
1024 	[BQ25960] = {
1025 		.model_id = BQ25960,
1026 		.regmap_config = &bq25960_regmap_config,
1027 
1028 		.busocp_def = BQ25960_BUSOCP_DFLT_uA,
1029 		.busocp_sc_min = BQ25960_BUSOCP_SC_MAX_uA,
1030 		.busocp_sc_max = BQ25960_BUSOCP_SC_MAX_uA,
1031 		.busocp_byp_min = BQ25960_BUSOCP_SC_MAX_uA,
1032 		.busocp_byp_max = BQ25960_BUSOCP_BYP_MAX_uA,
1033 
1034 		.busovp_sc_def = BQ25975_BUSOVP_DFLT_uV,
1035 		.busovp_byp_def = BQ25975_BUSOVP_BYPASS_DFLT_uV,
1036 		.busovp_sc_step = BQ25960_BUSOVP_SC_STEP_uV,
1037 		.busovp_sc_offset = BQ25960_BUSOVP_SC_OFFSET_uV,
1038 		.busovp_byp_step = BQ25960_BUSOVP_BYP_STEP_uV,
1039 		.busovp_byp_offset = BQ25960_BUSOVP_BYP_OFFSET_uV,
1040 		.busovp_sc_min = BQ25960_BUSOVP_SC_MIN_uV,
1041 		.busovp_sc_max = BQ25960_BUSOVP_SC_MAX_uV,
1042 		.busovp_byp_min = BQ25960_BUSOVP_BYP_MIN_uV,
1043 		.busovp_byp_max = BQ25960_BUSOVP_BYP_MAX_uV,
1044 
1045 		.batovp_def = BQ25960_BATOVP_DFLT_uV,
1046 		.batovp_max = BQ25960_BATOVP_MAX_uV,
1047 		.batovp_min = BQ25960_BATOVP_MIN_uV,
1048 		.batovp_step = BQ25960_BATOVP_STEP_uV,
1049 		.batovp_offset = BQ25960_BATOVP_OFFSET_uV,
1050 
1051 		.batocp_def = BQ25960_BATOCP_DFLT_uA,
1052 		.batocp_max = BQ25960_BATOCP_MAX_uA,
1053 	},
1054 };
1055 
bq25980_power_supply_init(struct bq25980_device * bq,struct device * dev)1056 static int bq25980_power_supply_init(struct bq25980_device *bq,
1057 							struct device *dev)
1058 {
1059 	struct power_supply_config psy_cfg = { .drv_data = bq,
1060 						.of_node = dev->of_node, };
1061 
1062 	psy_cfg.supplied_to = bq25980_charger_supplied_to;
1063 	psy_cfg.num_supplicants = ARRAY_SIZE(bq25980_charger_supplied_to);
1064 
1065 	bq->charger = devm_power_supply_register(bq->dev,
1066 						 &bq25980_power_supply_desc,
1067 						 &psy_cfg);
1068 	if (IS_ERR(bq->charger))
1069 		return -EINVAL;
1070 
1071 	bq->battery = devm_power_supply_register(bq->dev,
1072 						      &bq25980_battery_desc,
1073 						      &psy_cfg);
1074 	if (IS_ERR(bq->battery))
1075 		return -EINVAL;
1076 
1077 	return 0;
1078 }
1079 
bq25980_hw_init(struct bq25980_device * bq)1080 static int bq25980_hw_init(struct bq25980_device *bq)
1081 {
1082 	struct power_supply_battery_info *bat_info;
1083 	int wd_reg_val = BQ25980_WATCHDOG_DIS;
1084 	int wd_max_val = BQ25980_NUM_WD_VAL - 1;
1085 	int ret = 0;
1086 	int curr_val;
1087 	int volt_val;
1088 	int i;
1089 
1090 	if (bq->watchdog_timer) {
1091 		if (bq->watchdog_timer >= bq25980_watchdog_time[wd_max_val])
1092 			wd_reg_val = wd_max_val;
1093 		else {
1094 			for (i = 0; i < wd_max_val; i++) {
1095 				if (bq->watchdog_timer > bq25980_watchdog_time[i] &&
1096 				    bq->watchdog_timer < bq25980_watchdog_time[i + 1]) {
1097 					wd_reg_val = i;
1098 					break;
1099 				}
1100 			}
1101 		}
1102 	}
1103 
1104 	ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_3,
1105 				 BQ25980_WATCHDOG_MASK, wd_reg_val);
1106 	if (ret)
1107 		return ret;
1108 
1109 	ret = power_supply_get_battery_info(bq->charger, &bat_info);
1110 	if (ret) {
1111 		dev_warn(bq->dev, "battery info missing\n");
1112 		return -EINVAL;
1113 	}
1114 
1115 	bq->init_data.ichg_max = bat_info->constant_charge_current_max_ua;
1116 	bq->init_data.vreg_max = bat_info->constant_charge_voltage_max_uv;
1117 
1118 	if (bq->state.bypass) {
1119 		ret = regmap_update_bits(bq->regmap, BQ25980_CHRGR_CTRL_2,
1120 					BQ25980_EN_BYPASS, BQ25980_EN_BYPASS);
1121 		if (ret)
1122 			return ret;
1123 
1124 		curr_val = bq->init_data.bypass_ilim;
1125 		volt_val = bq->init_data.bypass_vlim;
1126 	} else {
1127 		curr_val = bq->init_data.sc_ilim;
1128 		volt_val = bq->init_data.sc_vlim;
1129 	}
1130 
1131 	ret = bq25980_set_input_curr_lim(bq, curr_val);
1132 	if (ret)
1133 		return ret;
1134 
1135 	ret = bq25980_set_input_volt_lim(bq, volt_val);
1136 	if (ret)
1137 		return ret;
1138 
1139 	return regmap_update_bits(bq->regmap, BQ25980_ADC_CONTROL1,
1140 				 BQ25980_ADC_EN, BQ25980_ADC_EN);
1141 }
1142 
bq25980_parse_dt(struct bq25980_device * bq)1143 static int bq25980_parse_dt(struct bq25980_device *bq)
1144 {
1145 	int ret;
1146 
1147 	ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
1148 				       &bq->watchdog_timer);
1149 	if (ret)
1150 		bq->watchdog_timer = BQ25980_WATCHDOG_MIN;
1151 
1152 	if (bq->watchdog_timer > BQ25980_WATCHDOG_MAX ||
1153 	    bq->watchdog_timer < BQ25980_WATCHDOG_MIN)
1154 		return -EINVAL;
1155 
1156 	ret = device_property_read_u32(bq->dev,
1157 				       "ti,sc-ovp-limit-microvolt",
1158 				       &bq->init_data.sc_vlim);
1159 	if (ret)
1160 		bq->init_data.sc_vlim = bq->chip_info->busovp_sc_def;
1161 
1162 	if (bq->init_data.sc_vlim > bq->chip_info->busovp_sc_max ||
1163 	    bq->init_data.sc_vlim < bq->chip_info->busovp_sc_min) {
1164 		dev_err(bq->dev, "SC ovp limit is out of range\n");
1165 		return -EINVAL;
1166 	}
1167 
1168 	ret = device_property_read_u32(bq->dev,
1169 				       "ti,sc-ocp-limit-microamp",
1170 				       &bq->init_data.sc_ilim);
1171 	if (ret)
1172 		bq->init_data.sc_ilim = bq->chip_info->busocp_def;
1173 
1174 	if (bq->init_data.sc_ilim > bq->chip_info->busocp_sc_max ||
1175 	    bq->init_data.sc_ilim < bq->chip_info->busocp_sc_min) {
1176 		dev_err(bq->dev, "SC ocp limit is out of range\n");
1177 		return -EINVAL;
1178 	}
1179 
1180 	ret = device_property_read_u32(bq->dev,
1181 				       "ti,bypass-ovp-limit-microvolt",
1182 				       &bq->init_data.bypass_vlim);
1183 	if (ret)
1184 		bq->init_data.bypass_vlim = bq->chip_info->busovp_byp_def;
1185 
1186 	if (bq->init_data.bypass_vlim > bq->chip_info->busovp_byp_max ||
1187 	    bq->init_data.bypass_vlim < bq->chip_info->busovp_byp_min) {
1188 		dev_err(bq->dev, "Bypass ovp limit is out of range\n");
1189 		return -EINVAL;
1190 	}
1191 
1192 	ret = device_property_read_u32(bq->dev,
1193 				       "ti,bypass-ocp-limit-microamp",
1194 				       &bq->init_data.bypass_ilim);
1195 	if (ret)
1196 		bq->init_data.bypass_ilim = bq->chip_info->busocp_def;
1197 
1198 	if (bq->init_data.bypass_ilim > bq->chip_info->busocp_byp_max ||
1199 	    bq->init_data.bypass_ilim < bq->chip_info->busocp_byp_min) {
1200 		dev_err(bq->dev, "Bypass ocp limit is out of range\n");
1201 		return -EINVAL;
1202 	}
1203 
1204 
1205 	bq->state.bypass = device_property_read_bool(bq->dev,
1206 						      "ti,bypass-enable");
1207 	return 0;
1208 }
1209 
bq25980_probe(struct i2c_client * client)1210 static int bq25980_probe(struct i2c_client *client)
1211 {
1212 	const struct i2c_device_id *id = i2c_client_get_device_id(client);
1213 	struct device *dev = &client->dev;
1214 	struct bq25980_device *bq;
1215 	int ret;
1216 
1217 	bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
1218 	if (!bq)
1219 		return -ENOMEM;
1220 
1221 	bq->client = client;
1222 	bq->dev = dev;
1223 
1224 	mutex_init(&bq->lock);
1225 
1226 	strncpy(bq->model_name, id->name, I2C_NAME_SIZE);
1227 	bq->chip_info = &bq25980_chip_info_tbl[id->driver_data];
1228 
1229 	bq->regmap = devm_regmap_init_i2c(client,
1230 					  bq->chip_info->regmap_config);
1231 	if (IS_ERR(bq->regmap)) {
1232 		dev_err(dev, "Failed to allocate register map\n");
1233 		return PTR_ERR(bq->regmap);
1234 	}
1235 
1236 	i2c_set_clientdata(client, bq);
1237 
1238 	ret = bq25980_parse_dt(bq);
1239 	if (ret) {
1240 		dev_err(dev, "Failed to read device tree properties%d\n", ret);
1241 		return ret;
1242 	}
1243 
1244 	if (client->irq) {
1245 		ret = devm_request_threaded_irq(dev, client->irq, NULL,
1246 						bq25980_irq_handler_thread,
1247 						IRQF_TRIGGER_FALLING |
1248 						IRQF_ONESHOT,
1249 						dev_name(&client->dev), bq);
1250 		if (ret)
1251 			return ret;
1252 	}
1253 
1254 	ret = bq25980_power_supply_init(bq, dev);
1255 	if (ret) {
1256 		dev_err(dev, "Failed to register power supply\n");
1257 		return ret;
1258 	}
1259 
1260 	ret = bq25980_hw_init(bq);
1261 	if (ret) {
1262 		dev_err(dev, "Cannot initialize the chip.\n");
1263 		return ret;
1264 	}
1265 
1266 	return 0;
1267 }
1268 
1269 static const struct i2c_device_id bq25980_i2c_ids[] = {
1270 	{ "bq25980", BQ25980 },
1271 	{ "bq25975", BQ25975 },
1272 	{ "bq25960", BQ25960 },
1273 	{},
1274 };
1275 MODULE_DEVICE_TABLE(i2c, bq25980_i2c_ids);
1276 
1277 static const struct of_device_id bq25980_of_match[] = {
1278 	{ .compatible = "ti,bq25980", .data = (void *)BQ25980 },
1279 	{ .compatible = "ti,bq25975", .data = (void *)BQ25975 },
1280 	{ .compatible = "ti,bq25960", .data = (void *)BQ25960 },
1281 	{ },
1282 };
1283 MODULE_DEVICE_TABLE(of, bq25980_of_match);
1284 
1285 static struct i2c_driver bq25980_driver = {
1286 	.driver = {
1287 		.name = "bq25980-charger",
1288 		.of_match_table = bq25980_of_match,
1289 	},
1290 	.probe = bq25980_probe,
1291 	.id_table = bq25980_i2c_ids,
1292 };
1293 module_i2c_driver(bq25980_driver);
1294 
1295 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
1296 MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
1297 MODULE_DESCRIPTION("bq25980 charger driver");
1298 MODULE_LICENSE("GPL v2");
1299