1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2021 MediaTek Inc.
4  */
5 
6 #include <linux/devm-helpers.h>
7 #include <linux/init.h>
8 #include <linux/interrupt.h>
9 #include <linux/kernel.h>
10 #include <linux/linear_range.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/platform_device.h>
14 #include <linux/power_supply.h>
15 #include <linux/property.h>
16 #include <linux/regmap.h>
17 #include <linux/regulator/driver.h>
18 
19 #define MT6360_PMU_CHG_CTRL1	0x311
20 #define MT6360_PMU_CHG_CTRL2	0x312
21 #define MT6360_PMU_CHG_CTRL3	0x313
22 #define MT6360_PMU_CHG_CTRL4	0x314
23 #define MT6360_PMU_CHG_CTRL5	0x315
24 #define MT6360_PMU_CHG_CTRL6	0x316
25 #define MT6360_PMU_CHG_CTRL7	0x317
26 #define MT6360_PMU_CHG_CTRL8	0x318
27 #define MT6360_PMU_CHG_CTRL9	0x319
28 #define MT6360_PMU_CHG_CTRL10	0x31A
29 #define MT6360_PMU_DEVICE_TYPE	0x322
30 #define MT6360_PMU_USB_STATUS1	0x327
31 #define MT6360_PMU_CHG_STAT	0x34A
32 #define MT6360_PMU_CHG_CTRL19	0x361
33 #define MT6360_PMU_FOD_STAT	0x3E7
34 
35 /* MT6360_PMU_CHG_CTRL1 */
36 #define MT6360_FSLP_SHFT	(3)
37 #define MT6360_FSLP_MASK	BIT(MT6360_FSLP_SHFT)
38 #define MT6360_OPA_MODE_SHFT	(0)
39 #define MT6360_OPA_MODE_MASK	BIT(MT6360_OPA_MODE_SHFT)
40 /* MT6360_PMU_CHG_CTRL2 */
41 #define MT6360_IINLMTSEL_SHFT	(2)
42 #define MT6360_IINLMTSEL_MASK	GENMASK(3, 2)
43 /* MT6360_PMU_CHG_CTRL3 */
44 #define MT6360_IAICR_SHFT	(2)
45 #define MT6360_IAICR_MASK	GENMASK(7, 2)
46 #define MT6360_ILIM_EN_MASK	BIT(0)
47 /* MT6360_PMU_CHG_CTRL4 */
48 #define MT6360_VOREG_SHFT	(1)
49 #define MT6360_VOREG_MASK	GENMASK(7, 1)
50 /* MT6360_PMU_CHG_CTRL5 */
51 #define MT6360_VOBST_MASK	GENMASK(7, 2)
52 /* MT6360_PMU_CHG_CTRL6 */
53 #define MT6360_VMIVR_SHFT      (1)
54 #define MT6360_VMIVR_MASK      GENMASK(7, 1)
55 /* MT6360_PMU_CHG_CTRL7 */
56 #define MT6360_ICHG_SHFT	(2)
57 #define MT6360_ICHG_MASK	GENMASK(7, 2)
58 /* MT6360_PMU_CHG_CTRL8 */
59 #define MT6360_IPREC_SHFT	(0)
60 #define MT6360_IPREC_MASK	GENMASK(3, 0)
61 /* MT6360_PMU_CHG_CTRL9 */
62 #define MT6360_IEOC_SHFT	(4)
63 #define MT6360_IEOC_MASK	GENMASK(7, 4)
64 /* MT6360_PMU_CHG_CTRL10 */
65 #define MT6360_OTG_OC_MASK	GENMASK(3, 0)
66 /* MT6360_PMU_DEVICE_TYPE */
67 #define MT6360_USBCHGEN_MASK	BIT(7)
68 /* MT6360_PMU_USB_STATUS1 */
69 #define MT6360_USB_STATUS_SHFT	(4)
70 #define MT6360_USB_STATUS_MASK	GENMASK(6, 4)
71 /* MT6360_PMU_CHG_STAT */
72 #define MT6360_CHG_STAT_SHFT	(6)
73 #define MT6360_CHG_STAT_MASK	GENMASK(7, 6)
74 #define MT6360_VBAT_LVL_MASK	BIT(5)
75 /* MT6360_PMU_CHG_CTRL19 */
76 #define MT6360_VINOVP_SHFT	(5)
77 #define MT6360_VINOVP_MASK	GENMASK(6, 5)
78 /* MT6360_PMU_FOD_STAT */
79 #define MT6360_CHRDET_EXT_MASK	BIT(4)
80 
81 /* uV */
82 #define MT6360_VMIVR_MIN	3900000
83 #define MT6360_VMIVR_MAX	13400000
84 #define MT6360_VMIVR_STEP	100000
85 /* uA */
86 #define MT6360_ICHG_MIN		100000
87 #define MT6360_ICHG_MAX		5000000
88 #define MT6360_ICHG_STEP	100000
89 /* uV */
90 #define MT6360_VOREG_MIN	3900000
91 #define MT6360_VOREG_MAX	4710000
92 #define MT6360_VOREG_STEP	10000
93 /* uA */
94 #define MT6360_AICR_MIN		100000
95 #define MT6360_AICR_MAX		3250000
96 #define MT6360_AICR_STEP	50000
97 /* uA */
98 #define MT6360_IPREC_MIN	100000
99 #define MT6360_IPREC_MAX	850000
100 #define MT6360_IPREC_STEP	50000
101 /* uA */
102 #define MT6360_IEOC_MIN		100000
103 #define MT6360_IEOC_MAX		850000
104 #define MT6360_IEOC_STEP	50000
105 
106 enum {
107 	MT6360_RANGE_VMIVR,
108 	MT6360_RANGE_ICHG,
109 	MT6360_RANGE_VOREG,
110 	MT6360_RANGE_AICR,
111 	MT6360_RANGE_IPREC,
112 	MT6360_RANGE_IEOC,
113 	MT6360_RANGE_MAX,
114 };
115 
116 static const struct linear_range mt6360_chg_range[MT6360_RANGE_MAX] = {
117 	LINEAR_RANGE_IDX(MT6360_RANGE_VMIVR, 3900000, 0, 0x5F, 100000),
118 	LINEAR_RANGE_IDX(MT6360_RANGE_ICHG, 100000, 0, 0x31, 100000),
119 	LINEAR_RANGE_IDX(MT6360_RANGE_VOREG, 3900000, 0, 0x51, 10000),
120 	LINEAR_RANGE_IDX(MT6360_RANGE_AICR, 100000, 0, 0x3F, 50000),
121 	LINEAR_RANGE_IDX(MT6360_RANGE_IPREC, 100000, 0, 0x0F, 50000),
122 	LINEAR_RANGE_IDX(MT6360_RANGE_IEOC, 100000, 0, 0x0F, 50000),
123 };
124 
125 struct mt6360_chg_info {
126 	struct device *dev;
127 	struct regmap *regmap;
128 	struct power_supply_desc psy_desc;
129 	struct power_supply *psy;
130 	struct regulator_dev *otg_rdev;
131 	struct mutex chgdet_lock;
132 	u32 vinovp;
133 	bool pwr_rdy;
134 	bool bc12_en;
135 	int psy_usb_type;
136 	struct work_struct chrdet_work;
137 };
138 
139 enum mt6360_iinlmtsel {
140 	MT6360_IINLMTSEL_AICR_3250 = 0,
141 	MT6360_IINLMTSEL_CHG_TYPE,
142 	MT6360_IINLMTSEL_AICR,
143 	MT6360_IINLMTSEL_LOWER_LEVEL,
144 };
145 
146 enum mt6360_pmu_chg_type {
147 	MT6360_CHG_TYPE_NOVBUS = 0,
148 	MT6360_CHG_TYPE_UNDER_GOING,
149 	MT6360_CHG_TYPE_SDP,
150 	MT6360_CHG_TYPE_SDPNSTD,
151 	MT6360_CHG_TYPE_DCP,
152 	MT6360_CHG_TYPE_CDP,
153 	MT6360_CHG_TYPE_DISABLE_BC12,
154 	MT6360_CHG_TYPE_MAX,
155 };
156 
157 static enum power_supply_usb_type mt6360_charger_usb_types[] = {
158 	POWER_SUPPLY_USB_TYPE_UNKNOWN,
159 	POWER_SUPPLY_USB_TYPE_SDP,
160 	POWER_SUPPLY_USB_TYPE_DCP,
161 	POWER_SUPPLY_USB_TYPE_CDP,
162 };
163 
164 static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
165 					     bool *pwr_rdy)
166 {
167 	int ret;
168 	unsigned int regval;
169 
170 	ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, &regval);
171 	if (ret < 0)
172 		return ret;
173 	*pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
174 	return 0;
175 }
176 
177 static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
178 				     union power_supply_propval *val)
179 {
180 	int ret;
181 	bool pwr_rdy;
182 
183 	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
184 	if (ret < 0)
185 		return ret;
186 	val->intval = pwr_rdy ? true : false;
187 	return 0;
188 }
189 
190 static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
191 				     union power_supply_propval *val)
192 {
193 	int status, ret;
194 	unsigned int regval;
195 	bool pwr_rdy;
196 
197 	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
198 	if (ret < 0)
199 		return ret;
200 	if (!pwr_rdy) {
201 		status = POWER_SUPPLY_STATUS_DISCHARGING;
202 		goto out;
203 	}
204 
205 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
206 	if (ret < 0)
207 		return ret;
208 	regval &= MT6360_CHG_STAT_MASK;
209 	regval >>= MT6360_CHG_STAT_SHFT;
210 	switch (regval) {
211 	case 0x0:
212 		status = POWER_SUPPLY_STATUS_NOT_CHARGING;
213 		break;
214 	case 0x1:
215 		status = POWER_SUPPLY_STATUS_CHARGING;
216 		break;
217 	case 0x2:
218 		status = POWER_SUPPLY_STATUS_FULL;
219 		break;
220 	default:
221 		ret = -EIO;
222 	}
223 out:
224 	if (!ret)
225 		val->intval = status;
226 	return ret;
227 }
228 
229 static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
230 					  union power_supply_propval *val)
231 {
232 	int type, ret;
233 	unsigned int regval;
234 	u8 chg_stat;
235 
236 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
237 	if (ret < 0)
238 		return ret;
239 
240 	chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
241 	switch (chg_stat) {
242 	case 0x01: /* Charge in Progress */
243 		if (regval & MT6360_VBAT_LVL_MASK)
244 			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
245 		else
246 			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
247 		break;
248 	case 0x00: /* Not Charging */
249 	case 0x02: /* Charge Done */
250 	case 0x03: /* Charge Fault */
251 	default:
252 		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
253 		break;
254 	}
255 
256 	val->intval = type;
257 	return 0;
258 }
259 
260 static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
261 				   union power_supply_propval *val)
262 {
263 	int ret;
264 	u32 sel, value;
265 
266 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &sel);
267 	if (ret < 0)
268 		return ret;
269 	sel = (sel & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
270 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_ICHG], sel, &value);
271 	if (!ret)
272 		val->intval = value;
273 	return ret;
274 }
275 
276 static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
277 				       union power_supply_propval *val)
278 {
279 	val->intval = MT6360_ICHG_MAX;
280 	return 0;
281 }
282 
283 static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
284 				 union power_supply_propval *val)
285 {
286 	int ret;
287 	u32 sel, value;
288 
289 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &sel);
290 	if (ret < 0)
291 		return ret;
292 	sel = (sel & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
293 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VOREG], sel, &value);
294 	if (!ret)
295 		val->intval = value;
296 	return ret;
297 }
298 
299 static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
300 				     union power_supply_propval *val)
301 {
302 	val->intval = MT6360_VOREG_MAX;
303 	return 0;
304 }
305 
306 static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
307 				   union power_supply_propval *val)
308 {
309 	int ret;
310 	u32 sel, value;
311 
312 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &sel);
313 	if (ret < 0)
314 		return ret;
315 	sel = (sel & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
316 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_AICR], sel, &value);
317 	if (!ret)
318 		val->intval = value;
319 	return ret;
320 }
321 
322 static int mt6360_charger_get_mivr(struct mt6360_chg_info *mci,
323 				   union power_supply_propval *val)
324 {
325 	int ret;
326 	u32 sel, value;
327 
328 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL6, &sel);
329 	if (ret < 0)
330 		return ret;
331 	sel = (sel & MT6360_VMIVR_MASK) >> MT6360_VMIVR_SHFT;
332 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VMIVR], sel, &value);
333 	if (!ret)
334 		val->intval = value;
335 	return ret;
336 }
337 
338 static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
339 				      union power_supply_propval *val)
340 {
341 	int ret;
342 	u32 sel, value;
343 
344 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &sel);
345 	if (ret < 0)
346 		return ret;
347 	sel = (sel & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
348 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IPREC], sel, &value);
349 	if (!ret)
350 		val->intval = value;
351 	return ret;
352 }
353 
354 static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
355 				   union power_supply_propval *val)
356 {
357 	int ret;
358 	u32 sel, value;
359 
360 	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &sel);
361 	if (ret < 0)
362 		return ret;
363 	sel = (sel & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
364 	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IEOC], sel, &value);
365 	if (!ret)
366 		val->intval = value;
367 	return ret;
368 }
369 
370 static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
371 				     const union power_supply_propval *val)
372 {
373 	u8 force_sleep = val->intval ? 0 : 1;
374 
375 	return regmap_update_bits(mci->regmap,
376 				  MT6360_PMU_CHG_CTRL1,
377 				  MT6360_FSLP_MASK,
378 				  force_sleep << MT6360_FSLP_SHFT);
379 }
380 
381 static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
382 				   const union power_supply_propval *val)
383 {
384 	u32 sel;
385 
386 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_ICHG], val->intval, &sel);
387 	return regmap_update_bits(mci->regmap,
388 				  MT6360_PMU_CHG_CTRL7,
389 				  MT6360_ICHG_MASK,
390 				  sel << MT6360_ICHG_SHFT);
391 }
392 
393 static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
394 				 const union power_supply_propval *val)
395 {
396 	u32 sel;
397 
398 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VOREG], val->intval, &sel);
399 	return regmap_update_bits(mci->regmap,
400 				  MT6360_PMU_CHG_CTRL4,
401 				  MT6360_VOREG_MASK,
402 				  sel << MT6360_VOREG_SHFT);
403 }
404 
405 static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
406 				   const union power_supply_propval *val)
407 {
408 	u32 sel;
409 
410 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_AICR], val->intval, &sel);
411 	return regmap_update_bits(mci->regmap,
412 				  MT6360_PMU_CHG_CTRL3,
413 				  MT6360_IAICR_MASK,
414 				  sel << MT6360_IAICR_SHFT);
415 }
416 
417 static int mt6360_charger_set_mivr(struct mt6360_chg_info *mci,
418 				   const union power_supply_propval *val)
419 {
420 	u32 sel;
421 
422 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VMIVR], val->intval, &sel);
423 	return regmap_update_bits(mci->regmap,
424 				  MT6360_PMU_CHG_CTRL3,
425 				  MT6360_VMIVR_MASK,
426 				  sel << MT6360_VMIVR_SHFT);
427 }
428 
429 static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
430 				      const union power_supply_propval *val)
431 {
432 	u32 sel;
433 
434 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IPREC], val->intval, &sel);
435 	return regmap_update_bits(mci->regmap,
436 				  MT6360_PMU_CHG_CTRL8,
437 				  MT6360_IPREC_MASK,
438 				  sel << MT6360_IPREC_SHFT);
439 }
440 
441 static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
442 				   const union power_supply_propval *val)
443 {
444 	u32 sel;
445 
446 	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IEOC], val->intval, &sel);
447 	return regmap_update_bits(mci->regmap,
448 				  MT6360_PMU_CHG_CTRL9,
449 				  MT6360_IEOC_MASK,
450 				  sel << MT6360_IEOC_SHFT);
451 }
452 
453 static int mt6360_charger_get_property(struct power_supply *psy,
454 				       enum power_supply_property psp,
455 				       union power_supply_propval *val)
456 {
457 	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
458 	int ret = 0;
459 
460 	switch (psp) {
461 	case POWER_SUPPLY_PROP_ONLINE:
462 		ret = mt6360_charger_get_online(mci, val);
463 		break;
464 	case POWER_SUPPLY_PROP_STATUS:
465 		ret = mt6360_charger_get_status(mci, val);
466 		break;
467 	case POWER_SUPPLY_PROP_CHARGE_TYPE:
468 		ret = mt6360_charger_get_charge_type(mci, val);
469 		break;
470 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
471 		ret = mt6360_charger_get_ichg(mci, val);
472 		break;
473 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
474 		ret = mt6360_charger_get_max_ichg(mci, val);
475 		break;
476 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
477 		ret = mt6360_charger_get_cv(mci, val);
478 		break;
479 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
480 		ret = mt6360_charger_get_max_cv(mci, val);
481 		break;
482 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
483 		ret = mt6360_charger_get_aicr(mci, val);
484 		break;
485 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
486 		ret = mt6360_charger_get_mivr(mci, val);
487 		break;
488 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
489 		ret = mt6360_charger_get_iprechg(mci, val);
490 		break;
491 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
492 		ret = mt6360_charger_get_ieoc(mci, val);
493 		break;
494 	case POWER_SUPPLY_PROP_USB_TYPE:
495 		val->intval = mci->psy_usb_type;
496 		break;
497 	default:
498 		ret = -ENODATA;
499 	}
500 	return ret;
501 }
502 
503 static int mt6360_charger_set_property(struct power_supply *psy,
504 				       enum power_supply_property psp,
505 				       const union power_supply_propval *val)
506 {
507 	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
508 	int ret;
509 
510 	switch (psp) {
511 	case POWER_SUPPLY_PROP_ONLINE:
512 		ret = mt6360_charger_set_online(mci, val);
513 		break;
514 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
515 		ret = mt6360_charger_set_ichg(mci, val);
516 		break;
517 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
518 		ret = mt6360_charger_set_cv(mci, val);
519 		break;
520 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
521 		ret = mt6360_charger_set_aicr(mci, val);
522 		break;
523 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
524 		ret = mt6360_charger_set_mivr(mci, val);
525 		break;
526 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
527 		ret = mt6360_charger_set_iprechg(mci, val);
528 		break;
529 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
530 		ret = mt6360_charger_set_ieoc(mci, val);
531 		break;
532 	default:
533 		ret = -EINVAL;
534 	}
535 	return ret;
536 }
537 
538 static int mt6360_charger_property_is_writeable(struct power_supply *psy,
539 					       enum power_supply_property psp)
540 {
541 	switch (psp) {
542 	case POWER_SUPPLY_PROP_ONLINE:
543 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
544 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
545 	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
546 	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
547 	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
548 	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
549 		return 1;
550 	default:
551 		return 0;
552 	}
553 }
554 
555 static enum power_supply_property mt6360_charger_properties[] = {
556 	POWER_SUPPLY_PROP_ONLINE,
557 	POWER_SUPPLY_PROP_STATUS,
558 	POWER_SUPPLY_PROP_CHARGE_TYPE,
559 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
560 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
561 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
562 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
563 	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
564 	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
565 	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
566 	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
567 	POWER_SUPPLY_PROP_USB_TYPE,
568 };
569 
570 static const struct power_supply_desc mt6360_charger_desc = {
571 	.type			= POWER_SUPPLY_TYPE_USB,
572 	.properties		= mt6360_charger_properties,
573 	.num_properties		= ARRAY_SIZE(mt6360_charger_properties),
574 	.get_property		= mt6360_charger_get_property,
575 	.set_property		= mt6360_charger_set_property,
576 	.property_is_writeable	= mt6360_charger_property_is_writeable,
577 	.usb_types		= mt6360_charger_usb_types,
578 	.num_usb_types		= ARRAY_SIZE(mt6360_charger_usb_types),
579 };
580 
581 static const struct regulator_ops mt6360_chg_otg_ops = {
582 	.list_voltage = regulator_list_voltage_linear,
583 	.enable = regulator_enable_regmap,
584 	.disable = regulator_disable_regmap,
585 	.is_enabled = regulator_is_enabled_regmap,
586 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
587 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
588 };
589 
590 static const struct regulator_desc mt6360_otg_rdesc = {
591 	.of_match = "usb-otg-vbus",
592 	.name = "usb-otg-vbus",
593 	.ops = &mt6360_chg_otg_ops,
594 	.owner = THIS_MODULE,
595 	.type = REGULATOR_VOLTAGE,
596 	.min_uV = 4425000,
597 	.uV_step = 25000,
598 	.n_voltages = 57,
599 	.vsel_reg = MT6360_PMU_CHG_CTRL5,
600 	.vsel_mask = MT6360_VOBST_MASK,
601 	.enable_reg = MT6360_PMU_CHG_CTRL1,
602 	.enable_mask = MT6360_OPA_MODE_MASK,
603 };
604 
605 static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
606 {
607 	struct mt6360_chg_info *mci = data;
608 	int ret;
609 	unsigned int usb_status;
610 	int last_usb_type;
611 
612 	mutex_lock(&mci->chgdet_lock);
613 	if (!mci->bc12_en) {
614 		dev_warn(mci->dev, "Received attach interrupt, bc12 disabled, ignore irq\n");
615 		goto out;
616 	}
617 	last_usb_type = mci->psy_usb_type;
618 	/* Plug in */
619 	ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
620 	if (ret < 0)
621 		goto out;
622 	usb_status &= MT6360_USB_STATUS_MASK;
623 	usb_status >>= MT6360_USB_STATUS_SHFT;
624 	switch (usb_status) {
625 	case MT6360_CHG_TYPE_NOVBUS:
626 		dev_dbg(mci->dev, "Received attach interrupt, no vbus\n");
627 		goto out;
628 	case MT6360_CHG_TYPE_UNDER_GOING:
629 		dev_dbg(mci->dev, "Received attach interrupt, under going...\n");
630 		goto out;
631 	case MT6360_CHG_TYPE_SDP:
632 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
633 		break;
634 	case MT6360_CHG_TYPE_SDPNSTD:
635 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
636 		break;
637 	case MT6360_CHG_TYPE_CDP:
638 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
639 		break;
640 	case MT6360_CHG_TYPE_DCP:
641 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
642 		break;
643 	case MT6360_CHG_TYPE_DISABLE_BC12:
644 		dev_dbg(mci->dev, "Received attach interrupt, bc12 detect not enable\n");
645 		goto out;
646 	default:
647 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
648 		dev_dbg(mci->dev, "Received attach interrupt, reserved address\n");
649 		goto out;
650 	}
651 
652 	dev_dbg(mci->dev, "Received attach interrupt, chg_type = %d\n", mci->psy_usb_type);
653 	if (last_usb_type != mci->psy_usb_type)
654 		power_supply_changed(mci->psy);
655 out:
656 	mutex_unlock(&mci->chgdet_lock);
657 	return IRQ_HANDLED;
658 }
659 
660 static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
661 {
662 	int ret;
663 	bool pwr_rdy;
664 
665 	mutex_lock(&mci->chgdet_lock);
666 	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
667 	if (ret < 0)
668 		goto out;
669 	if (mci->pwr_rdy == pwr_rdy) {
670 		dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy is same(%d)\n", pwr_rdy);
671 		goto out;
672 	}
673 	mci->pwr_rdy = pwr_rdy;
674 	dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy = %d\n", pwr_rdy);
675 	if (!pwr_rdy) {
676 		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
677 		power_supply_changed(mci->psy);
678 
679 	}
680 	ret = regmap_update_bits(mci->regmap,
681 				 MT6360_PMU_DEVICE_TYPE,
682 				 MT6360_USBCHGEN_MASK,
683 				 pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
684 	if (ret < 0)
685 		goto out;
686 	mci->bc12_en = pwr_rdy;
687 out:
688 	mutex_unlock(&mci->chgdet_lock);
689 }
690 
691 static void mt6360_chrdet_work(struct work_struct *work)
692 {
693 	struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
694 				     work, struct mt6360_chg_info, chrdet_work);
695 
696 	mt6360_handle_chrdet_ext_evt(mci);
697 }
698 
699 static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
700 {
701 	struct mt6360_chg_info *mci = data;
702 
703 	mt6360_handle_chrdet_ext_evt(mci);
704 	return IRQ_HANDLED;
705 }
706 
707 static int mt6360_chg_irq_register(struct platform_device *pdev)
708 {
709 	const struct {
710 		const char *name;
711 		irq_handler_t handler;
712 	} irq_descs[] = {
713 		{ "attach_i", mt6360_pmu_attach_i_handler },
714 		{ "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
715 	};
716 	int i, ret;
717 
718 	for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
719 		ret = platform_get_irq_byname(pdev, irq_descs[i].name);
720 		if (ret < 0)
721 			return ret;
722 
723 		ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
724 						irq_descs[i].handler,
725 						IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
726 						irq_descs[i].name,
727 						platform_get_drvdata(pdev));
728 		if (ret < 0)
729 			return dev_err_probe(&pdev->dev, ret, "Failed to request %s irq\n",
730 					     irq_descs[i].name);
731 	}
732 
733 	return 0;
734 }
735 
736 static u32 mt6360_vinovp_trans_to_sel(u32 val)
737 {
738 	u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
739 	int i;
740 
741 	/* Select the smaller and equal supported value */
742 	for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
743 		if (val < vinovp_tbl[i+1])
744 			break;
745 	}
746 	return i;
747 }
748 
749 static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
750 {
751 	int ret;
752 	u32 sel;
753 
754 	sel = mt6360_vinovp_trans_to_sel(mci->vinovp);
755 	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
756 				  MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
757 	if (ret)
758 		return dev_err_probe(mci->dev, ret, "%s: Failed to apply vinovp\n", __func__);
759 	ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
760 				 MT6360_USBCHGEN_MASK, 0);
761 	if (ret)
762 		return dev_err_probe(mci->dev, ret, "%s: Failed to disable bc12\n", __func__);
763 	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
764 				 MT6360_IINLMTSEL_MASK,
765 				 MT6360_IINLMTSEL_AICR <<
766 					MT6360_IINLMTSEL_SHFT);
767 	if (ret)
768 		return dev_err_probe(mci->dev, ret,
769 				     "%s: Failed to switch iinlmtsel to aicr\n", __func__);
770 	usleep_range(5000, 6000);
771 	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
772 				 MT6360_ILIM_EN_MASK, 0);
773 	if (ret)
774 		return dev_err_probe(mci->dev, ret,
775 				     "%s: Failed to disable ilim\n", __func__);
776 	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
777 				 MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
778 	if (ret)
779 		return dev_err_probe(mci->dev, ret,
780 				     "%s: Failed to config otg oc to 3A\n", __func__);
781 	return 0;
782 }
783 
784 static int mt6360_charger_probe(struct platform_device *pdev)
785 {
786 	struct mt6360_chg_info *mci;
787 	struct power_supply_config charger_cfg = {};
788 	struct regulator_config config = { };
789 	int ret;
790 
791 	mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
792 	if (!mci)
793 		return -ENOMEM;
794 
795 	mci->dev = &pdev->dev;
796 	mci->vinovp = 6500000;
797 	mutex_init(&mci->chgdet_lock);
798 	platform_set_drvdata(pdev, mci);
799 	devm_work_autocancel(&pdev->dev, &mci->chrdet_work, mt6360_chrdet_work);
800 
801 	ret = device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);
802 	if (ret)
803 		dev_warn(&pdev->dev, "Failed to parse vinovp in DT, keep default 6.5v\n");
804 
805 	mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
806 	if (!mci->regmap)
807 		return dev_err_probe(&pdev->dev, -ENODEV, "Failed to get parent regmap\n");
808 
809 	ret = mt6360_chg_init_setting(mci);
810 	if (ret)
811 		return dev_err_probe(&pdev->dev, ret, "Failed to initial setting\n");
812 
813 	memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
814 	mci->psy_desc.name = dev_name(&pdev->dev);
815 	charger_cfg.drv_data = mci;
816 	charger_cfg.of_node = pdev->dev.of_node;
817 	mci->psy = devm_power_supply_register(&pdev->dev,
818 					      &mci->psy_desc, &charger_cfg);
819 	if (IS_ERR(mci->psy))
820 		return dev_err_probe(&pdev->dev, PTR_ERR(mci->psy),
821 				     "Failed to register power supply dev\n");
822 
823 
824 	ret = mt6360_chg_irq_register(pdev);
825 	if (ret)
826 		return dev_err_probe(&pdev->dev, ret, "Failed to register irqs\n");
827 
828 	config.dev = &pdev->dev;
829 	config.regmap = mci->regmap;
830 	mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
831 						&config);
832 	if (IS_ERR(mci->otg_rdev))
833 		return PTR_ERR(mci->otg_rdev);
834 
835 	schedule_work(&mci->chrdet_work);
836 
837 	return 0;
838 }
839 
840 static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
841 	{ .compatible = "mediatek,mt6360-chg", },
842 	{},
843 };
844 MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
845 
846 static const struct platform_device_id mt6360_charger_id[] = {
847 	{ "mt6360-chg", 0 },
848 	{},
849 };
850 MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
851 
852 static struct platform_driver mt6360_charger_driver = {
853 	.driver = {
854 		.name = "mt6360-chg",
855 		.of_match_table = of_match_ptr(mt6360_charger_of_id),
856 	},
857 	.probe = mt6360_charger_probe,
858 	.id_table = mt6360_charger_id,
859 };
860 module_platform_driver(mt6360_charger_driver);
861 
862 MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
863 MODULE_DESCRIPTION("MT6360 Charger Driver");
864 MODULE_LICENSE("GPL");
865