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 #define MT6360_LINEAR_RANGE(idx, _min, _min_sel, _max_sel, _step) \
117 [idx] = REGULATOR_LINEAR_RANGE(_min, _min_sel, _max_sel, _step)
118
119 static const struct linear_range mt6360_chg_range[MT6360_RANGE_MAX] = {
120 MT6360_LINEAR_RANGE(MT6360_RANGE_VMIVR, 3900000, 0, 0x5F, 100000),
121 MT6360_LINEAR_RANGE(MT6360_RANGE_ICHG, 100000, 0, 0x31, 100000),
122 MT6360_LINEAR_RANGE(MT6360_RANGE_VOREG, 3900000, 0, 0x51, 10000),
123 MT6360_LINEAR_RANGE(MT6360_RANGE_AICR, 100000, 0, 0x3F, 50000),
124 MT6360_LINEAR_RANGE(MT6360_RANGE_IPREC, 100000, 0, 0x0F, 50000),
125 MT6360_LINEAR_RANGE(MT6360_RANGE_IEOC, 100000, 0, 0x0F, 50000),
126 };
127
128 struct mt6360_chg_info {
129 struct device *dev;
130 struct regmap *regmap;
131 struct power_supply_desc psy_desc;
132 struct power_supply *psy;
133 struct regulator_dev *otg_rdev;
134 struct mutex chgdet_lock;
135 u32 vinovp;
136 bool pwr_rdy;
137 bool bc12_en;
138 int psy_usb_type;
139 struct work_struct chrdet_work;
140 };
141
142 enum mt6360_iinlmtsel {
143 MT6360_IINLMTSEL_AICR_3250 = 0,
144 MT6360_IINLMTSEL_CHG_TYPE,
145 MT6360_IINLMTSEL_AICR,
146 MT6360_IINLMTSEL_LOWER_LEVEL,
147 };
148
149 enum mt6360_pmu_chg_type {
150 MT6360_CHG_TYPE_NOVBUS = 0,
151 MT6360_CHG_TYPE_UNDER_GOING,
152 MT6360_CHG_TYPE_SDP,
153 MT6360_CHG_TYPE_SDPNSTD,
154 MT6360_CHG_TYPE_DCP,
155 MT6360_CHG_TYPE_CDP,
156 MT6360_CHG_TYPE_DISABLE_BC12,
157 MT6360_CHG_TYPE_MAX,
158 };
159
160 static enum power_supply_usb_type mt6360_charger_usb_types[] = {
161 POWER_SUPPLY_USB_TYPE_UNKNOWN,
162 POWER_SUPPLY_USB_TYPE_SDP,
163 POWER_SUPPLY_USB_TYPE_DCP,
164 POWER_SUPPLY_USB_TYPE_CDP,
165 };
166
mt6360_get_chrdet_ext_stat(struct mt6360_chg_info * mci,bool * pwr_rdy)167 static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
168 bool *pwr_rdy)
169 {
170 int ret;
171 unsigned int regval;
172
173 ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, ®val);
174 if (ret < 0)
175 return ret;
176 *pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
177 return 0;
178 }
179
mt6360_charger_get_online(struct mt6360_chg_info * mci,union power_supply_propval * val)180 static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
181 union power_supply_propval *val)
182 {
183 int ret;
184 bool pwr_rdy;
185
186 ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
187 if (ret < 0)
188 return ret;
189 val->intval = pwr_rdy ? true : false;
190 return 0;
191 }
192
mt6360_charger_get_status(struct mt6360_chg_info * mci,union power_supply_propval * val)193 static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
194 union power_supply_propval *val)
195 {
196 int status, ret;
197 unsigned int regval;
198 bool pwr_rdy;
199
200 ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
201 if (ret < 0)
202 return ret;
203 if (!pwr_rdy) {
204 status = POWER_SUPPLY_STATUS_DISCHARGING;
205 goto out;
206 }
207
208 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, ®val);
209 if (ret < 0)
210 return ret;
211 regval &= MT6360_CHG_STAT_MASK;
212 regval >>= MT6360_CHG_STAT_SHFT;
213 switch (regval) {
214 case 0x0:
215 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
216 break;
217 case 0x1:
218 status = POWER_SUPPLY_STATUS_CHARGING;
219 break;
220 case 0x2:
221 status = POWER_SUPPLY_STATUS_FULL;
222 break;
223 default:
224 ret = -EIO;
225 }
226 out:
227 if (!ret)
228 val->intval = status;
229 return ret;
230 }
231
mt6360_charger_get_charge_type(struct mt6360_chg_info * mci,union power_supply_propval * val)232 static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
233 union power_supply_propval *val)
234 {
235 int type, ret;
236 unsigned int regval;
237 u8 chg_stat;
238
239 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, ®val);
240 if (ret < 0)
241 return ret;
242
243 chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
244 switch (chg_stat) {
245 case 0x01: /* Charge in Progress */
246 if (regval & MT6360_VBAT_LVL_MASK)
247 type = POWER_SUPPLY_CHARGE_TYPE_FAST;
248 else
249 type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
250 break;
251 case 0x00: /* Not Charging */
252 case 0x02: /* Charge Done */
253 case 0x03: /* Charge Fault */
254 default:
255 type = POWER_SUPPLY_CHARGE_TYPE_NONE;
256 break;
257 }
258
259 val->intval = type;
260 return 0;
261 }
262
mt6360_charger_get_ichg(struct mt6360_chg_info * mci,union power_supply_propval * val)263 static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
264 union power_supply_propval *val)
265 {
266 int ret;
267 u32 sel, value;
268
269 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &sel);
270 if (ret < 0)
271 return ret;
272 sel = (sel & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
273 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_ICHG], sel, &value);
274 if (!ret)
275 val->intval = value;
276 return ret;
277 }
278
mt6360_charger_get_max_ichg(struct mt6360_chg_info * mci,union power_supply_propval * val)279 static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
280 union power_supply_propval *val)
281 {
282 val->intval = MT6360_ICHG_MAX;
283 return 0;
284 }
285
mt6360_charger_get_cv(struct mt6360_chg_info * mci,union power_supply_propval * val)286 static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
287 union power_supply_propval *val)
288 {
289 int ret;
290 u32 sel, value;
291
292 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &sel);
293 if (ret < 0)
294 return ret;
295 sel = (sel & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
296 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VOREG], sel, &value);
297 if (!ret)
298 val->intval = value;
299 return ret;
300 }
301
mt6360_charger_get_max_cv(struct mt6360_chg_info * mci,union power_supply_propval * val)302 static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
303 union power_supply_propval *val)
304 {
305 val->intval = MT6360_VOREG_MAX;
306 return 0;
307 }
308
mt6360_charger_get_aicr(struct mt6360_chg_info * mci,union power_supply_propval * val)309 static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
310 union power_supply_propval *val)
311 {
312 int ret;
313 u32 sel, value;
314
315 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &sel);
316 if (ret < 0)
317 return ret;
318 sel = (sel & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
319 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_AICR], sel, &value);
320 if (!ret)
321 val->intval = value;
322 return ret;
323 }
324
mt6360_charger_get_mivr(struct mt6360_chg_info * mci,union power_supply_propval * val)325 static int mt6360_charger_get_mivr(struct mt6360_chg_info *mci,
326 union power_supply_propval *val)
327 {
328 int ret;
329 u32 sel, value;
330
331 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL6, &sel);
332 if (ret < 0)
333 return ret;
334 sel = (sel & MT6360_VMIVR_MASK) >> MT6360_VMIVR_SHFT;
335 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VMIVR], sel, &value);
336 if (!ret)
337 val->intval = value;
338 return ret;
339 }
340
mt6360_charger_get_iprechg(struct mt6360_chg_info * mci,union power_supply_propval * val)341 static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
342 union power_supply_propval *val)
343 {
344 int ret;
345 u32 sel, value;
346
347 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &sel);
348 if (ret < 0)
349 return ret;
350 sel = (sel & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
351 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IPREC], sel, &value);
352 if (!ret)
353 val->intval = value;
354 return ret;
355 }
356
mt6360_charger_get_ieoc(struct mt6360_chg_info * mci,union power_supply_propval * val)357 static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
358 union power_supply_propval *val)
359 {
360 int ret;
361 u32 sel, value;
362
363 ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &sel);
364 if (ret < 0)
365 return ret;
366 sel = (sel & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
367 ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IEOC], sel, &value);
368 if (!ret)
369 val->intval = value;
370 return ret;
371 }
372
mt6360_charger_set_online(struct mt6360_chg_info * mci,const union power_supply_propval * val)373 static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
374 const union power_supply_propval *val)
375 {
376 u8 force_sleep = val->intval ? 0 : 1;
377
378 return regmap_update_bits(mci->regmap,
379 MT6360_PMU_CHG_CTRL1,
380 MT6360_FSLP_MASK,
381 force_sleep << MT6360_FSLP_SHFT);
382 }
383
mt6360_charger_set_ichg(struct mt6360_chg_info * mci,const union power_supply_propval * val)384 static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
385 const union power_supply_propval *val)
386 {
387 u32 sel;
388
389 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_ICHG], val->intval, &sel);
390 return regmap_update_bits(mci->regmap,
391 MT6360_PMU_CHG_CTRL7,
392 MT6360_ICHG_MASK,
393 sel << MT6360_ICHG_SHFT);
394 }
395
mt6360_charger_set_cv(struct mt6360_chg_info * mci,const union power_supply_propval * val)396 static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
397 const union power_supply_propval *val)
398 {
399 u32 sel;
400
401 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VOREG], val->intval, &sel);
402 return regmap_update_bits(mci->regmap,
403 MT6360_PMU_CHG_CTRL4,
404 MT6360_VOREG_MASK,
405 sel << MT6360_VOREG_SHFT);
406 }
407
mt6360_charger_set_aicr(struct mt6360_chg_info * mci,const union power_supply_propval * val)408 static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
409 const union power_supply_propval *val)
410 {
411 u32 sel;
412
413 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_AICR], val->intval, &sel);
414 return regmap_update_bits(mci->regmap,
415 MT6360_PMU_CHG_CTRL3,
416 MT6360_IAICR_MASK,
417 sel << MT6360_IAICR_SHFT);
418 }
419
mt6360_charger_set_mivr(struct mt6360_chg_info * mci,const union power_supply_propval * val)420 static int mt6360_charger_set_mivr(struct mt6360_chg_info *mci,
421 const union power_supply_propval *val)
422 {
423 u32 sel;
424
425 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VMIVR], val->intval, &sel);
426 return regmap_update_bits(mci->regmap,
427 MT6360_PMU_CHG_CTRL3,
428 MT6360_VMIVR_MASK,
429 sel << MT6360_VMIVR_SHFT);
430 }
431
mt6360_charger_set_iprechg(struct mt6360_chg_info * mci,const union power_supply_propval * val)432 static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
433 const union power_supply_propval *val)
434 {
435 u32 sel;
436
437 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IPREC], val->intval, &sel);
438 return regmap_update_bits(mci->regmap,
439 MT6360_PMU_CHG_CTRL8,
440 MT6360_IPREC_MASK,
441 sel << MT6360_IPREC_SHFT);
442 }
443
mt6360_charger_set_ieoc(struct mt6360_chg_info * mci,const union power_supply_propval * val)444 static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
445 const union power_supply_propval *val)
446 {
447 u32 sel;
448
449 linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IEOC], val->intval, &sel);
450 return regmap_update_bits(mci->regmap,
451 MT6360_PMU_CHG_CTRL9,
452 MT6360_IEOC_MASK,
453 sel << MT6360_IEOC_SHFT);
454 }
455
mt6360_charger_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)456 static int mt6360_charger_get_property(struct power_supply *psy,
457 enum power_supply_property psp,
458 union power_supply_propval *val)
459 {
460 struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
461 int ret = 0;
462
463 switch (psp) {
464 case POWER_SUPPLY_PROP_ONLINE:
465 ret = mt6360_charger_get_online(mci, val);
466 break;
467 case POWER_SUPPLY_PROP_STATUS:
468 ret = mt6360_charger_get_status(mci, val);
469 break;
470 case POWER_SUPPLY_PROP_CHARGE_TYPE:
471 ret = mt6360_charger_get_charge_type(mci, val);
472 break;
473 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
474 ret = mt6360_charger_get_ichg(mci, val);
475 break;
476 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
477 ret = mt6360_charger_get_max_ichg(mci, val);
478 break;
479 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
480 ret = mt6360_charger_get_cv(mci, val);
481 break;
482 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
483 ret = mt6360_charger_get_max_cv(mci, val);
484 break;
485 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
486 ret = mt6360_charger_get_aicr(mci, val);
487 break;
488 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
489 ret = mt6360_charger_get_mivr(mci, val);
490 break;
491 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
492 ret = mt6360_charger_get_iprechg(mci, val);
493 break;
494 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
495 ret = mt6360_charger_get_ieoc(mci, val);
496 break;
497 case POWER_SUPPLY_PROP_USB_TYPE:
498 val->intval = mci->psy_usb_type;
499 break;
500 default:
501 ret = -ENODATA;
502 }
503 return ret;
504 }
505
mt6360_charger_set_property(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)506 static int mt6360_charger_set_property(struct power_supply *psy,
507 enum power_supply_property psp,
508 const union power_supply_propval *val)
509 {
510 struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
511 int ret;
512
513 switch (psp) {
514 case POWER_SUPPLY_PROP_ONLINE:
515 ret = mt6360_charger_set_online(mci, val);
516 break;
517 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
518 ret = mt6360_charger_set_ichg(mci, val);
519 break;
520 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
521 ret = mt6360_charger_set_cv(mci, val);
522 break;
523 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
524 ret = mt6360_charger_set_aicr(mci, val);
525 break;
526 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
527 ret = mt6360_charger_set_mivr(mci, val);
528 break;
529 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
530 ret = mt6360_charger_set_iprechg(mci, val);
531 break;
532 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
533 ret = mt6360_charger_set_ieoc(mci, val);
534 break;
535 default:
536 ret = -EINVAL;
537 }
538 return ret;
539 }
540
mt6360_charger_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)541 static int mt6360_charger_property_is_writeable(struct power_supply *psy,
542 enum power_supply_property psp)
543 {
544 switch (psp) {
545 case POWER_SUPPLY_PROP_ONLINE:
546 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
547 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
548 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
549 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
550 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
551 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
552 return 1;
553 default:
554 return 0;
555 }
556 }
557
558 static enum power_supply_property mt6360_charger_properties[] = {
559 POWER_SUPPLY_PROP_ONLINE,
560 POWER_SUPPLY_PROP_STATUS,
561 POWER_SUPPLY_PROP_CHARGE_TYPE,
562 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
563 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
564 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
565 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
566 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
567 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
568 POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
569 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
570 POWER_SUPPLY_PROP_USB_TYPE,
571 };
572
573 static const struct power_supply_desc mt6360_charger_desc = {
574 .type = POWER_SUPPLY_TYPE_USB,
575 .properties = mt6360_charger_properties,
576 .num_properties = ARRAY_SIZE(mt6360_charger_properties),
577 .get_property = mt6360_charger_get_property,
578 .set_property = mt6360_charger_set_property,
579 .property_is_writeable = mt6360_charger_property_is_writeable,
580 .usb_types = mt6360_charger_usb_types,
581 .num_usb_types = ARRAY_SIZE(mt6360_charger_usb_types),
582 };
583
584 static const struct regulator_ops mt6360_chg_otg_ops = {
585 .list_voltage = regulator_list_voltage_linear,
586 .enable = regulator_enable_regmap,
587 .disable = regulator_disable_regmap,
588 .is_enabled = regulator_is_enabled_regmap,
589 .set_voltage_sel = regulator_set_voltage_sel_regmap,
590 .get_voltage_sel = regulator_get_voltage_sel_regmap,
591 };
592
593 static const struct regulator_desc mt6360_otg_rdesc = {
594 .of_match = "usb-otg-vbus",
595 .name = "usb-otg-vbus",
596 .ops = &mt6360_chg_otg_ops,
597 .owner = THIS_MODULE,
598 .type = REGULATOR_VOLTAGE,
599 .min_uV = 4425000,
600 .uV_step = 25000,
601 .n_voltages = 57,
602 .vsel_reg = MT6360_PMU_CHG_CTRL5,
603 .vsel_mask = MT6360_VOBST_MASK,
604 .enable_reg = MT6360_PMU_CHG_CTRL1,
605 .enable_mask = MT6360_OPA_MODE_MASK,
606 };
607
mt6360_pmu_attach_i_handler(int irq,void * data)608 static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
609 {
610 struct mt6360_chg_info *mci = data;
611 int ret;
612 unsigned int usb_status;
613 int last_usb_type;
614
615 mutex_lock(&mci->chgdet_lock);
616 if (!mci->bc12_en) {
617 dev_warn(mci->dev, "Received attach interrupt, bc12 disabled, ignore irq\n");
618 goto out;
619 }
620 last_usb_type = mci->psy_usb_type;
621 /* Plug in */
622 ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
623 if (ret < 0)
624 goto out;
625 usb_status &= MT6360_USB_STATUS_MASK;
626 usb_status >>= MT6360_USB_STATUS_SHFT;
627 switch (usb_status) {
628 case MT6360_CHG_TYPE_NOVBUS:
629 dev_dbg(mci->dev, "Received attach interrupt, no vbus\n");
630 goto out;
631 case MT6360_CHG_TYPE_UNDER_GOING:
632 dev_dbg(mci->dev, "Received attach interrupt, under going...\n");
633 goto out;
634 case MT6360_CHG_TYPE_SDP:
635 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
636 break;
637 case MT6360_CHG_TYPE_SDPNSTD:
638 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
639 break;
640 case MT6360_CHG_TYPE_CDP:
641 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
642 break;
643 case MT6360_CHG_TYPE_DCP:
644 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
645 break;
646 case MT6360_CHG_TYPE_DISABLE_BC12:
647 dev_dbg(mci->dev, "Received attach interrupt, bc12 detect not enable\n");
648 goto out;
649 default:
650 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
651 dev_dbg(mci->dev, "Received attach interrupt, reserved address\n");
652 goto out;
653 }
654
655 dev_dbg(mci->dev, "Received attach interrupt, chg_type = %d\n", mci->psy_usb_type);
656 if (last_usb_type != mci->psy_usb_type)
657 power_supply_changed(mci->psy);
658 out:
659 mutex_unlock(&mci->chgdet_lock);
660 return IRQ_HANDLED;
661 }
662
mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info * mci)663 static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
664 {
665 int ret;
666 bool pwr_rdy;
667
668 mutex_lock(&mci->chgdet_lock);
669 ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
670 if (ret < 0)
671 goto out;
672 if (mci->pwr_rdy == pwr_rdy) {
673 dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy is same(%d)\n", pwr_rdy);
674 goto out;
675 }
676 mci->pwr_rdy = pwr_rdy;
677 dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy = %d\n", pwr_rdy);
678 if (!pwr_rdy) {
679 mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
680 power_supply_changed(mci->psy);
681
682 }
683 ret = regmap_update_bits(mci->regmap,
684 MT6360_PMU_DEVICE_TYPE,
685 MT6360_USBCHGEN_MASK,
686 pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
687 if (ret < 0)
688 goto out;
689 mci->bc12_en = pwr_rdy;
690 out:
691 mutex_unlock(&mci->chgdet_lock);
692 }
693
mt6360_chrdet_work(struct work_struct * work)694 static void mt6360_chrdet_work(struct work_struct *work)
695 {
696 struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
697 work, struct mt6360_chg_info, chrdet_work);
698
699 mt6360_handle_chrdet_ext_evt(mci);
700 }
701
mt6360_pmu_chrdet_ext_evt_handler(int irq,void * data)702 static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
703 {
704 struct mt6360_chg_info *mci = data;
705
706 mt6360_handle_chrdet_ext_evt(mci);
707 return IRQ_HANDLED;
708 }
709
mt6360_chg_irq_register(struct platform_device * pdev)710 static int mt6360_chg_irq_register(struct platform_device *pdev)
711 {
712 const struct {
713 const char *name;
714 irq_handler_t handler;
715 } irq_descs[] = {
716 { "attach_i", mt6360_pmu_attach_i_handler },
717 { "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
718 };
719 int i, ret;
720
721 for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
722 ret = platform_get_irq_byname(pdev, irq_descs[i].name);
723 if (ret < 0)
724 return ret;
725
726 ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
727 irq_descs[i].handler,
728 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
729 irq_descs[i].name,
730 platform_get_drvdata(pdev));
731 if (ret < 0)
732 return dev_err_probe(&pdev->dev, ret, "Failed to request %s irq\n",
733 irq_descs[i].name);
734 }
735
736 return 0;
737 }
738
mt6360_vinovp_trans_to_sel(u32 val)739 static u32 mt6360_vinovp_trans_to_sel(u32 val)
740 {
741 u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
742 int i;
743
744 /* Select the smaller and equal supported value */
745 for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
746 if (val < vinovp_tbl[i+1])
747 break;
748 }
749 return i;
750 }
751
mt6360_chg_init_setting(struct mt6360_chg_info * mci)752 static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
753 {
754 int ret;
755 u32 sel;
756
757 sel = mt6360_vinovp_trans_to_sel(mci->vinovp);
758 ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
759 MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
760 if (ret)
761 return dev_err_probe(mci->dev, ret, "%s: Failed to apply vinovp\n", __func__);
762 ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
763 MT6360_USBCHGEN_MASK, 0);
764 if (ret)
765 return dev_err_probe(mci->dev, ret, "%s: Failed to disable bc12\n", __func__);
766 ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
767 MT6360_IINLMTSEL_MASK,
768 MT6360_IINLMTSEL_AICR <<
769 MT6360_IINLMTSEL_SHFT);
770 if (ret)
771 return dev_err_probe(mci->dev, ret,
772 "%s: Failed to switch iinlmtsel to aicr\n", __func__);
773 usleep_range(5000, 6000);
774 ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
775 MT6360_ILIM_EN_MASK, 0);
776 if (ret)
777 return dev_err_probe(mci->dev, ret,
778 "%s: Failed to disable ilim\n", __func__);
779 ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
780 MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
781 if (ret)
782 return dev_err_probe(mci->dev, ret,
783 "%s: Failed to config otg oc to 3A\n", __func__);
784 return 0;
785 }
786
mt6360_charger_probe(struct platform_device * pdev)787 static int mt6360_charger_probe(struct platform_device *pdev)
788 {
789 struct mt6360_chg_info *mci;
790 struct power_supply_config charger_cfg = {};
791 struct regulator_config config = { };
792 int ret;
793
794 mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
795 if (!mci)
796 return -ENOMEM;
797
798 mci->dev = &pdev->dev;
799 mci->vinovp = 6500000;
800 mutex_init(&mci->chgdet_lock);
801 platform_set_drvdata(pdev, mci);
802 ret = devm_work_autocancel(&pdev->dev, &mci->chrdet_work, mt6360_chrdet_work);
803 if (ret)
804 return dev_err_probe(&pdev->dev, ret, "Failed to set delayed work\n");
805
806 ret = device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);
807 if (ret)
808 dev_warn(&pdev->dev, "Failed to parse vinovp in DT, keep default 6.5v\n");
809
810 mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
811 if (!mci->regmap)
812 return dev_err_probe(&pdev->dev, -ENODEV, "Failed to get parent regmap\n");
813
814 ret = mt6360_chg_init_setting(mci);
815 if (ret)
816 return dev_err_probe(&pdev->dev, ret, "Failed to initial setting\n");
817
818 memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
819 mci->psy_desc.name = dev_name(&pdev->dev);
820 charger_cfg.drv_data = mci;
821 charger_cfg.of_node = pdev->dev.of_node;
822 mci->psy = devm_power_supply_register(&pdev->dev,
823 &mci->psy_desc, &charger_cfg);
824 if (IS_ERR(mci->psy))
825 return dev_err_probe(&pdev->dev, PTR_ERR(mci->psy),
826 "Failed to register power supply dev\n");
827
828
829 ret = mt6360_chg_irq_register(pdev);
830 if (ret)
831 return dev_err_probe(&pdev->dev, ret, "Failed to register irqs\n");
832
833 config.dev = &pdev->dev;
834 config.regmap = mci->regmap;
835 mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
836 &config);
837 if (IS_ERR(mci->otg_rdev))
838 return PTR_ERR(mci->otg_rdev);
839
840 schedule_work(&mci->chrdet_work);
841
842 return 0;
843 }
844
845 static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
846 { .compatible = "mediatek,mt6360-chg", },
847 {},
848 };
849 MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
850
851 static const struct platform_device_id mt6360_charger_id[] = {
852 { "mt6360-chg", 0 },
853 {},
854 };
855 MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
856
857 static struct platform_driver mt6360_charger_driver = {
858 .driver = {
859 .name = "mt6360-chg",
860 .of_match_table = of_match_ptr(mt6360_charger_of_id),
861 },
862 .probe = mt6360_charger_probe,
863 .id_table = mt6360_charger_id,
864 };
865 module_platform_driver(mt6360_charger_driver);
866
867 MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
868 MODULE_DESCRIPTION("MT6360 Charger Driver");
869 MODULE_LICENSE("GPL");
870