1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2022 Richtek Technology Corp.
4 *
5 * Authors: Alina Yu <alina_yu@richtek.com>
6 * ChiYuan Huang <cy_huang@richtek.com>
7 */
8
9#include <linux/bits.h>
10#include <linux/gpio/consumer.h>
11#include <linux/i2c.h>
12#include <linux/interrupt.h>
13#include <linux/kstrtox.h>
14#include <linux/linear_range.h>
15#include <linux/mod_devicetable.h>
16#include <linux/module.h>
17#include <linux/mutex.h>
18#include <linux/of.h>
19#include <linux/power_supply.h>
20#include <linux/regmap.h>
21#include <linux/regulator/driver.h>
22#include <linux/sysfs.h>
23
24#define RT9471_REG_OTGCFG 0x00
25#define RT9471_REG_TOP 0x01
26#define RT9471_REG_FUNC 0x02
27#define RT9471_REG_IBUS 0x03
28#define RT9471_REG_VBUS 0x04
29#define RT9471_REG_PRECHG 0x05
30#define RT9471_REG_VCHG 0x07
31#define RT9471_REG_ICHG 0x08
32#define RT9471_REG_CHGTMR 0x09
33#define RT9471_REG_EOC 0x0A
34#define RT9471_REG_INFO 0x0B
35#define RT9471_REG_JEITA 0x0C
36#define RT9471_REG_PUMP_EXP 0x0D
37#define RT9471_REG_DPDMDET 0x0E
38#define RT9471_REG_ICSTAT 0x0F
39#define RT9471_REG_STAT0 0x10
40#define RT9471_REG_STAT1 0x11
41#define RT9471_REG_STAT2 0x12
42#define RT9471_REG_IRQ0 0x20
43#define RT9471_REG_MASK0 0x30
44
45#define RT9471_OTGCV_MASK GENMASK(7, 6)
46#define RT9471_OTGCC_MASK BIT(0)
47#define RT9471_OTGEN_MASK BIT(1)
48#define RT9471_CHGFAULT_MASK GENMASK(4, 1)
49
50#define RT9471_NUM_IRQ_REGS 4
51#define RT9471_OTGCV_MINUV 4850000
52#define RT9471_OTGCV_STEPUV 150000
53#define RT9471_NUM_VOTG 4
54#define RT9471_VCHG_MAXUV 4700000
55#define RT9471_ICHG_MAXUA 3150000
56
57/* Device ID */
58#define RT9470_DEVID 0x09
59#define RT9470D_DEVID 0x0A
60#define RT9471_DEVID 0x0D
61#define RT9471D_DEVID 0x0E
62
63/* IRQ number */
64#define RT9471_IRQ_BC12_DONE 0
65#define RT9471_IRQ_DETACH 1
66#define RT9471_IRQ_RECHG 2
67#define RT9471_IRQ_CHG_DONE 3
68#define RT9471_IRQ_BG_CHG 4
69#define RT9471_IRQ_IE0C 5
70#define RT9471_IRQ_CHG_RDY 6
71#define RT9471_IRQ_VBUS_GD 7
72#define RT9471_IRQ_CHG_BATOV 9
73#define RT9471_IRQ_CHG_SYSOV 10
74#define RT9471_IRQ_CHG_TOUT 11
75#define RT9471_IRQ_CHG_BUSUV 12
76#define RT9471_IRQ_CHG_THREG 13
77#define RT9471_IRQ_CHG_AICR 14
78#define RT9471_IRQ_CHG_MIVR 15
79#define RT9471_IRQ_SYS_SHORT 16
80#define RT9471_IRQ_SYS_MIN 17
81#define RT9471_IRQ_AICC_DONE 18
82#define RT9471_IRQ_PE_DONE 19
83#define RT9471_IRQ_JEITA_COLD 20
84#define RT9471_IRQ_JEITA_COOL 21
85#define RT9471_IRQ_JEITA_WARM 22
86#define RT9471_IRQ_JEITA_HOT 23
87#define RT9471_IRQ_OTG_FAULT 24
88#define RT9471_IRQ_OTG_LBP 25
89#define RT9471_IRQ_OTG_CC 26
90#define RT9471_IRQ_WDT 29
91#define RT9471_IRQ_VAC_OV 30
92#define RT9471_IRQ_OTP 31
93
94enum rt9471_fields {
95 F_WDT = 0,
96 F_WDT_RST,
97 F_CHG_EN,
98 F_HZ,
99 F_BATFET_DIS,
100 F_AICR,
101 F_AICC_EN,
102 F_MIVR,
103 F_IPRE_CHG,
104 F_VPRE_CHG,
105 F_VBAT_REG,
106 F_ICHG_REG,
107 F_EOC_RST,
108 F_TE,
109 F_IEOC_CHG,
110 F_DEVICE_ID,
111 F_REG_RST,
112 F_BC12_EN,
113 F_IC_STAT,
114 F_PORT_STAT,
115 F_ST_CHG_DONE,
116 F_ST_CHG_RDY,
117 F_ST_VBUS_GD,
118 F_MAX_FIELDS
119};
120
121enum rt9471_ranges {
122 RT9471_RANGE_AICR = 0,
123 RT9471_RANGE_MIVR,
124 RT9471_RANGE_IPRE,
125 RT9471_RANGE_VCHG,
126 RT9471_RANGE_ICHG,
127 RT9471_RANGE_IEOC,
128 RT9471_MAX_RANGES
129};
130
131enum {
132 RT9471_PORTSTAT_APPLE_10W = 8,
133 RT9471_PORTSTAT_SAMSUNG_10W,
134 RT9471_PORTSTAT_APPLE_5W,
135 RT9471_PORTSTAT_APPLE_12W,
136 RT9471_PORTSTAT_NSTD,
137 RT9471_PORTSTAT_SDP,
138 RT9471_PORTSTAT_CDP,
139 RT9471_PORTSTAT_DCP,
140};
141
142enum {
143 RT9471_ICSTAT_SLEEP = 0,
144 RT9471_ICSTAT_VBUSRDY,
145 RT9471_ICSTAT_TRICKLECHG,
146 RT9471_ICSTAT_PRECHG,
147 RT9471_ICSTAT_FASTCHG,
148 RT9471_ICSTAT_IEOC,
149 RT9471_ICSTAT_BGCHG,
150 RT9471_ICSTAT_CHGDONE,
151 RT9471_ICSTAT_CHGFAULT,
152 RT9471_ICSTAT_OTG = 15,
153};
154
155struct rt9471_chip {
156 struct device *dev;
157 struct regmap *regmap;
158 struct regmap_field *rm_fields[F_MAX_FIELDS];
159 struct regmap_irq_chip_data *irq_chip_data;
160 struct regulator_dev *otg_rdev;
161 struct power_supply *psy;
162 struct power_supply_desc psy_desc;
163 struct mutex var_lock;
164 enum power_supply_usb_type psy_usb_type;
165 int psy_usb_curr;
166};
167
168static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = {
169 [F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 1),
170 [F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 2, 2),
171 [F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0),
172 [F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5),
173 [F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7),
174 [F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5),
175 [F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7),
176 [F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3),
177 [F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3),
178 [F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6),
179 [F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6),
180 [F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5),
181 [F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0),
182 [F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1),
183 [F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7),
184 [F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6),
185 [F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7),
186 [F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7),
187 [F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3),
188 [F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7),
189 [F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3),
190 [F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6),
191 [F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7),
192};
193
194static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = {
195 [RT9471_RANGE_AICR] = LINEAR_RANGE(50000, 1, 63, 50000),
196 [RT9471_RANGE_MIVR] = LINEAR_RANGE(3900000, 0, 15, 100000),
197 [RT9471_RANGE_IPRE] = LINEAR_RANGE(50000, 0, 15, 50000),
198 [RT9471_RANGE_VCHG] = LINEAR_RANGE(3900000, 0, 80, 10000),
199 [RT9471_RANGE_ICHG] = LINEAR_RANGE(0, 0, 63, 50000),
200 [RT9471_RANGE_IEOC] = LINEAR_RANGE(50000, 0, 15, 50000),
201};
202
203static int rt9471_set_value_by_field_range(struct rt9471_chip *chip,
204 enum rt9471_fields field,
205 enum rt9471_ranges range, int val)
206{
207 unsigned int sel;
208
209 if (val < 0)
210 return -EINVAL;
211
212 linear_range_get_selector_within(r: rt9471_chg_ranges + range, val, selector: &sel);
213
214 return regmap_field_write(field: chip->rm_fields[field], val: sel);
215}
216
217
218static int rt9471_get_value_by_field_range(struct rt9471_chip *chip,
219 enum rt9471_fields field,
220 enum rt9471_ranges range, int *val)
221{
222 unsigned int sel, rvalue;
223 int ret;
224
225 ret = regmap_field_read(field: chip->rm_fields[field], val: &sel);
226 if (ret)
227 return ret;
228
229 ret = linear_range_get_value(r: rt9471_chg_ranges + range, selector: sel, val: &rvalue);
230 if (ret)
231 return ret;
232
233 *val = rvalue;
234 return 0;
235}
236
237static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp)
238{
239 int ret;
240
241 if (microamp == 0)
242 return regmap_field_write(field: chip->rm_fields[F_TE], val: 0);
243
244 ret = rt9471_set_value_by_field_range(chip, field: F_IEOC_CHG, range: RT9471_RANGE_IEOC, val: microamp);
245 if (ret)
246 return ret;
247
248 /* After applying the new IEOC value, enable charge termination */
249 return regmap_field_write(field: chip->rm_fields[F_TE], val: 1);
250}
251
252static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp)
253{
254 unsigned int chg_term_enable;
255 int ret;
256
257 ret = regmap_field_read(field: chip->rm_fields[F_TE], val: &chg_term_enable);
258 if (ret)
259 return ret;
260
261 if (!chg_term_enable) {
262 *microamp = 0;
263 return 0;
264 }
265
266 return rt9471_get_value_by_field_range(chip, field: F_IEOC_CHG, range: RT9471_RANGE_IEOC, val: microamp);
267}
268
269static int rt9471_get_status(struct rt9471_chip *chip, int *status)
270{
271 unsigned int ic_stat;
272 int ret;
273
274 ret = regmap_field_read(field: chip->rm_fields[F_IC_STAT], val: &ic_stat);
275 if (ret)
276 return ret;
277
278 switch (ic_stat) {
279 case RT9471_ICSTAT_VBUSRDY:
280 case RT9471_ICSTAT_CHGFAULT:
281 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
282 break;
283 case RT9471_ICSTAT_TRICKLECHG ... RT9471_ICSTAT_BGCHG:
284 *status = POWER_SUPPLY_STATUS_CHARGING;
285 break;
286 case RT9471_ICSTAT_CHGDONE:
287 *status = POWER_SUPPLY_STATUS_FULL;
288 break;
289 case RT9471_ICSTAT_SLEEP:
290 case RT9471_ICSTAT_OTG:
291 *status = POWER_SUPPLY_STATUS_DISCHARGING;
292 break;
293 default:
294 *status = POWER_SUPPLY_STATUS_UNKNOWN;
295 break;
296 }
297
298 return 0;
299}
300
301static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat)
302{
303 unsigned int vbus_gd;
304 int ret;
305
306 ret = regmap_field_read(field: chip->rm_fields[F_ST_VBUS_GD], val: &vbus_gd);
307 if (ret)
308 return ret;
309
310 *stat = vbus_gd;
311 return 0;
312}
313
314static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type)
315{
316 mutex_lock(&chip->var_lock);
317 *usb_type = chip->psy_usb_type;
318 mutex_unlock(lock: &chip->var_lock);
319
320 return 0;
321}
322
323static int rt9471_get_usb_type_current(struct rt9471_chip *chip,
324 int *microamp)
325{
326 mutex_lock(&chip->var_lock);
327 *microamp = chip->psy_usb_curr;
328 mutex_unlock(lock: &chip->var_lock);
329
330 return 0;
331}
332
333static enum power_supply_property rt9471_charger_properties[] = {
334 POWER_SUPPLY_PROP_STATUS,
335 POWER_SUPPLY_PROP_ONLINE,
336 POWER_SUPPLY_PROP_CURRENT_MAX,
337 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
338 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
339 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
340 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
341 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
342 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
343 POWER_SUPPLY_PROP_USB_TYPE,
344 POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
345 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
346 POWER_SUPPLY_PROP_MODEL_NAME,
347 POWER_SUPPLY_PROP_MANUFACTURER,
348};
349
350static int rt9471_charger_property_is_writeable(struct power_supply *psy,
351 enum power_supply_property psp)
352{
353 switch (psp) {
354 case POWER_SUPPLY_PROP_STATUS:
355 case POWER_SUPPLY_PROP_ONLINE:
356 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
357 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
358 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
359 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
360 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
361 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
362 return 1;
363 default:
364 return 0;
365 }
366}
367
368static int rt9471_charger_set_property(struct power_supply *psy,
369 enum power_supply_property psp,
370 const union power_supply_propval *val)
371{
372 struct rt9471_chip *chip = power_supply_get_drvdata(psy);
373 int value = val->intval;
374
375 switch (psp) {
376 case POWER_SUPPLY_PROP_STATUS:
377 return regmap_field_write(field: chip->rm_fields[F_CHG_EN], val: !!value);
378 case POWER_SUPPLY_PROP_ONLINE:
379 return regmap_field_write(field: chip->rm_fields[F_HZ], val: !value);
380 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
381 return rt9471_set_value_by_field_range(chip, field: F_ICHG_REG, range: RT9471_RANGE_ICHG, val: value);
382 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
383 return rt9471_set_value_by_field_range(chip, field: F_VBAT_REG, range: RT9471_RANGE_VCHG, val: value);
384 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
385 return rt9471_set_value_by_field_range(chip, field: F_AICR, range: RT9471_RANGE_AICR, val: value);
386 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
387 return rt9471_set_value_by_field_range(chip, field: F_MIVR, range: RT9471_RANGE_MIVR, val: value);
388 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
389 return rt9471_set_value_by_field_range(chip, field: F_IPRE_CHG, range: RT9471_RANGE_IPRE, val: value);
390 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
391 return rt9471_set_ieoc(chip, microamp: val->intval);
392 default:
393 return -EINVAL;
394 }
395}
396
397static const char * const rt9471_manufacturer = "Richtek Technology Corp.";
398static const char * const rt9471_model = "RT9471";
399
400static int rt9471_charger_get_property(struct power_supply *psy,
401 enum power_supply_property psp,
402 union power_supply_propval *val)
403{
404 struct rt9471_chip *chip = power_supply_get_drvdata(psy);
405 int *pvalue = &val->intval;
406
407 switch (psp) {
408 case POWER_SUPPLY_PROP_STATUS:
409 return rt9471_get_status(chip, status: pvalue);
410 case POWER_SUPPLY_PROP_ONLINE:
411 return rt9471_get_vbus_good(chip, stat: pvalue);
412 case POWER_SUPPLY_PROP_CURRENT_MAX:
413 return rt9471_get_usb_type_current(chip, microamp: pvalue);
414 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
415 return rt9471_get_value_by_field_range(chip, field: F_ICHG_REG, range: RT9471_RANGE_ICHG, val: pvalue);
416 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
417 *pvalue = RT9471_ICHG_MAXUA;
418 return 0;
419 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
420 return rt9471_get_value_by_field_range(chip, field: F_VBAT_REG, range: RT9471_RANGE_VCHG, val: pvalue);
421 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
422 val->intval = RT9471_VCHG_MAXUV;
423 return 0;
424 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
425 return rt9471_get_value_by_field_range(chip, field: F_AICR, range: RT9471_RANGE_AICR, val: pvalue);
426 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
427 return rt9471_get_value_by_field_range(chip, field: F_MIVR, range: RT9471_RANGE_MIVR, val: pvalue);
428 case POWER_SUPPLY_PROP_USB_TYPE:
429 return rt9471_get_usb_type(chip, usb_type: pvalue);
430 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
431 return rt9471_get_value_by_field_range(chip, field: F_IPRE_CHG, range: RT9471_RANGE_IPRE, val: pvalue);
432 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
433 return rt9471_get_ieoc(chip, microamp: pvalue);
434 case POWER_SUPPLY_PROP_MODEL_NAME:
435 val->strval = rt9471_model;
436 return 0;
437 case POWER_SUPPLY_PROP_MANUFACTURER:
438 val->strval = rt9471_manufacturer;
439 return 0;
440 default:
441 return -ENODATA;
442 }
443}
444
445static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid)
446{
447 struct rt9471_chip *chip = devid;
448
449 power_supply_changed(psy: chip->psy);
450
451 return IRQ_HANDLED;
452}
453
454static irqreturn_t rt9471_detach_handler(int irqno, void *devid)
455{
456 struct rt9471_chip *chip = devid;
457 unsigned int vbus_gd;
458 int ret;
459
460 ret = regmap_field_read(field: chip->rm_fields[F_ST_VBUS_GD], val: &vbus_gd);
461 if (ret)
462 return IRQ_NONE;
463
464 /* Only focus on really detached */
465 if (vbus_gd)
466 return IRQ_HANDLED;
467
468 mutex_lock(&chip->var_lock);
469 chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
470 chip->psy_usb_curr = 0;
471 mutex_unlock(lock: &chip->var_lock);
472
473 power_supply_changed(psy: chip->psy);
474
475 return IRQ_HANDLED;
476}
477
478static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid)
479{
480 struct rt9471_chip *chip = devid;
481 enum power_supply_usb_type usb_type;
482 unsigned int port_stat;
483 int usb_curr, ret;
484
485 ret = regmap_field_read(field: chip->rm_fields[F_PORT_STAT], val: &port_stat);
486 if (ret)
487 return IRQ_NONE;
488
489 switch (port_stat) {
490 case RT9471_PORTSTAT_APPLE_10W:
491 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
492 usb_curr = 2000000;
493 break;
494 case RT9471_PORTSTAT_APPLE_5W:
495 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
496 usb_curr = 1000000;
497 break;
498 case RT9471_PORTSTAT_APPLE_12W:
499 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
500 usb_curr = 2400000;
501 break;
502 case RT9471_PORTSTAT_SAMSUNG_10W:
503 usb_type = POWER_SUPPLY_USB_TYPE_DCP;
504 usb_curr = 2000000;
505 break;
506 case RT9471_PORTSTAT_DCP:
507 usb_type = POWER_SUPPLY_USB_TYPE_DCP;
508 usb_curr = 1500000;
509 break;
510 case RT9471_PORTSTAT_NSTD:
511 case RT9471_PORTSTAT_SDP:
512 usb_type = POWER_SUPPLY_USB_TYPE_SDP;
513 usb_curr = 500000;
514 break;
515 case RT9471_PORTSTAT_CDP:
516 usb_type = POWER_SUPPLY_USB_TYPE_CDP;
517 usb_curr = 1500000;
518 break;
519 default:
520 usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
521 usb_curr = 0;
522 break;
523 }
524
525 mutex_lock(&chip->var_lock);
526 chip->psy_usb_type = usb_type;
527 chip->psy_usb_curr = usb_curr;
528 mutex_unlock(lock: &chip->var_lock);
529
530 power_supply_changed(psy: chip->psy);
531
532 return IRQ_HANDLED;
533}
534
535static irqreturn_t rt9471_wdt_handler(int irqno, void *devid)
536{
537 struct rt9471_chip *chip = devid;
538 int ret;
539
540 ret = regmap_field_write(field: chip->rm_fields[F_WDT_RST], val: 1);
541
542 return ret ? IRQ_NONE : IRQ_HANDLED;
543}
544
545static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid)
546{
547 struct rt9471_chip *chip = devid;
548
549 regulator_notifier_call_chain(rdev: chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL);
550
551 return IRQ_HANDLED;
552}
553
554#define RT9471_IRQ_DESC(_name, _hwirq) \
555{ \
556 .name = #_name, \
557 .hwirq = _hwirq, \
558 .handler = rt9471_##_name##_handler, \
559}
560
561static int rt9471_register_interrupts(struct rt9471_chip *chip)
562{
563 struct device *dev = chip->dev;
564 static const struct {
565 char *name;
566 int hwirq;
567 irq_handler_t handler;
568 } chg_irqs[] = {
569 RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD),
570 RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH),
571 RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE),
572 RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT),
573 RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT),
574 }, *curr;
575 int i, virq, ret;
576
577 for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) {
578 curr = chg_irqs + i;
579
580 virq = regmap_irq_get_virq(data: chip->irq_chip_data, irq: curr->hwirq);
581 if (virq <= 0)
582 return virq;
583
584 ret = devm_request_threaded_irq(dev, irq: virq, NULL, thread_fn: curr->handler,
585 IRQF_ONESHOT, devname: curr->name, dev_id: chip);
586 if (ret)
587 return dev_err_probe(dev, err: ret, fmt: "Failed to register IRQ (%s)\n",
588 curr->name);
589 }
590
591 return 0;
592}
593
594static const struct regulator_ops rt9471_otg_ops = {
595 .enable = regulator_enable_regmap,
596 .disable = regulator_disable_regmap,
597 .is_enabled = regulator_is_enabled_regmap,
598 .list_voltage = regulator_list_voltage_linear,
599 .get_voltage_sel = regulator_get_voltage_sel_regmap,
600 .set_voltage_sel = regulator_set_voltage_sel_regmap,
601 .set_current_limit = regulator_set_current_limit_regmap,
602 .get_current_limit = regulator_get_current_limit_regmap,
603};
604
605static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, };
606
607static const struct regulator_desc rt9471_otg_rdesc = {
608 .of_match = of_match_ptr("usb-otg-vbus-regulator"),
609 .name = "rt9471-otg-vbus",
610 .owner = THIS_MODULE,
611 .type = REGULATOR_VOLTAGE,
612 .ops = &rt9471_otg_ops,
613 .min_uV = RT9471_OTGCV_MINUV,
614 .uV_step = RT9471_OTGCV_STEPUV,
615 .n_voltages = RT9471_NUM_VOTG,
616 .curr_table = rt9471_otg_microamp,
617 .n_current_limits = ARRAY_SIZE(rt9471_otg_microamp),
618 .enable_mask = RT9471_OTGEN_MASK,
619 .enable_reg = RT9471_REG_FUNC,
620 .vsel_reg = RT9471_REG_OTGCFG,
621 .vsel_mask = RT9471_OTGCV_MASK,
622 .csel_reg = RT9471_REG_OTGCFG,
623 .csel_mask = RT9471_OTGCC_MASK,
624};
625
626static int rt9471_register_otg_regulator(struct rt9471_chip *chip)
627{
628 struct device *dev = chip->dev;
629 struct regulator_config cfg = { .dev = dev, .driver_data = chip };
630
631 chip->otg_rdev = devm_regulator_register(dev, regulator_desc: &rt9471_otg_rdesc, config: &cfg);
632
633 return PTR_ERR_OR_ZERO(ptr: chip->otg_rdev);
634}
635
636static inline struct rt9471_chip *psy_device_to_chip(struct device *dev)
637{
638 return power_supply_get_drvdata(to_power_supply(dev));
639}
640
641static ssize_t sysoff_enable_show(struct device *dev,
642 struct device_attribute *attr, char *buf)
643{
644 struct rt9471_chip *chip = psy_device_to_chip(dev);
645 unsigned int sysoff_enable;
646 int ret;
647
648 ret = regmap_field_read(field: chip->rm_fields[F_BATFET_DIS], val: &sysoff_enable);
649 if (ret)
650 return ret;
651
652 return sysfs_emit(buf, fmt: "%d\n", sysoff_enable);
653}
654
655static ssize_t sysoff_enable_store(struct device *dev,
656 struct device_attribute *attr,
657 const char *buf, size_t count)
658{
659 struct rt9471_chip *chip = psy_device_to_chip(dev);
660 unsigned int tmp;
661 int ret;
662
663 ret = kstrtouint(s: buf, base: 10, res: &tmp);
664 if (ret)
665 return ret;
666
667 ret = regmap_field_write(field: chip->rm_fields[F_BATFET_DIS], val: !!tmp);
668 if (ret)
669 return ret;
670
671 return count;
672}
673
674static ssize_t port_detect_enable_show(struct device *dev,
675 struct device_attribute *attr, char *buf)
676{
677 struct rt9471_chip *chip = psy_device_to_chip(dev);
678 unsigned int bc12_enable;
679 int ret;
680
681 ret = regmap_field_read(field: chip->rm_fields[F_BC12_EN], val: &bc12_enable);
682 if (ret)
683 return ret;
684
685 return sysfs_emit(buf, fmt: "%d\n", bc12_enable);
686}
687
688static ssize_t port_detect_enable_store(struct device *dev,
689 struct device_attribute *attr,
690 const char *buf, size_t count)
691{
692 struct rt9471_chip *chip = psy_device_to_chip(dev);
693 unsigned int tmp;
694 int ret;
695
696 ret = kstrtouint(s: buf, base: 10, res: &tmp);
697 if (ret)
698 return ret;
699
700 ret = regmap_field_write(field: chip->rm_fields[F_BC12_EN], val: !!tmp);
701 if (ret)
702 return ret;
703
704 return count;
705}
706
707static DEVICE_ATTR_RW(sysoff_enable);
708static DEVICE_ATTR_RW(port_detect_enable);
709
710static struct attribute *rt9471_sysfs_attrs[] = {
711 &dev_attr_sysoff_enable.attr,
712 &dev_attr_port_detect_enable.attr,
713 NULL
714};
715
716ATTRIBUTE_GROUPS(rt9471_sysfs);
717
718static int rt9471_register_psy(struct rt9471_chip *chip)
719{
720 struct device *dev = chip->dev;
721 struct power_supply_desc *desc = &chip->psy_desc;
722 struct power_supply_config cfg = {};
723 char *psy_name;
724
725 cfg.drv_data = chip;
726 cfg.fwnode = dev_fwnode(dev);
727 cfg.attr_grp = rt9471_sysfs_groups;
728
729 psy_name = devm_kasprintf(dev, GFP_KERNEL, fmt: "rt9471-%s", dev_name(dev));
730 if (!psy_name)
731 return -ENOMEM;
732
733 desc->name = psy_name;
734 desc->type = POWER_SUPPLY_TYPE_USB;
735 desc->usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
736 BIT(POWER_SUPPLY_USB_TYPE_CDP) |
737 BIT(POWER_SUPPLY_USB_TYPE_DCP) |
738 BIT(POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID) |
739 BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN);
740 desc->properties = rt9471_charger_properties;
741 desc->num_properties = ARRAY_SIZE(rt9471_charger_properties);
742 desc->get_property = rt9471_charger_get_property;
743 desc->set_property = rt9471_charger_set_property;
744 desc->property_is_writeable = rt9471_charger_property_is_writeable;
745
746 chip->psy = devm_power_supply_register(parent: dev, desc, cfg: &cfg);
747
748 return PTR_ERR_OR_ZERO(ptr: chip->psy);
749}
750
751static const struct regmap_irq rt9471_regmap_irqs[] = {
752 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8),
753 REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8),
754 REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8),
755 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8),
756 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8),
757 REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8),
758 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8),
759 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8),
760 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8),
761 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8),
762 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8),
763 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8),
764 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8),
765 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8),
766 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8),
767 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8),
768 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8),
769 REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8),
770 REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8),
771 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8),
772 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8),
773 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8),
774 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8),
775 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8),
776 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8),
777 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8),
778 REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8),
779 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8),
780 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8),
781};
782
783static const struct regmap_irq_chip rt9471_irq_chip = {
784 .name = "rt9471-irqs",
785 .status_base = RT9471_REG_IRQ0,
786 .mask_base = RT9471_REG_MASK0,
787 .num_regs = RT9471_NUM_IRQ_REGS,
788 .irqs = rt9471_regmap_irqs,
789 .num_irqs = ARRAY_SIZE(rt9471_regmap_irqs),
790};
791
792static const struct reg_sequence rt9471_init_regs[] = {
793 REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */
794 REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */
795 REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */
796 REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */
797 REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */
798 REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */
799 REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */
800};
801
802static int rt9471_check_devinfo(struct rt9471_chip *chip)
803{
804 struct device *dev = chip->dev;
805 unsigned int dev_id;
806 int ret;
807
808 ret = regmap_field_read(field: chip->rm_fields[F_DEVICE_ID], val: &dev_id);
809 if (ret)
810 return dev_err_probe(dev, err: ret, fmt: "Failed to read device_id\n");
811
812 switch (dev_id) {
813 case RT9470_DEVID:
814 case RT9470D_DEVID:
815 case RT9471_DEVID:
816 case RT9471D_DEVID:
817 return 0;
818 default:
819 return dev_err_probe(dev, err: -ENODEV, fmt: "Incorrect device id\n");
820 }
821}
822
823static bool rt9471_accessible_reg(struct device *dev, unsigned int reg)
824{
825 switch (reg) {
826 case 0x00 ... 0x0F:
827 case 0x10 ... 0x13:
828 case 0x20 ... 0x33:
829 case 0x40 ... 0xA1:
830 return true;
831 default:
832 return false;
833 }
834}
835
836static const struct regmap_config rt9471_regmap_config = {
837 .reg_bits = 8,
838 .val_bits = 8,
839 .max_register = 0xA1,
840 .writeable_reg = rt9471_accessible_reg,
841 .readable_reg = rt9471_accessible_reg,
842};
843
844static int rt9471_probe(struct i2c_client *i2c)
845{
846 struct device *dev = &i2c->dev;
847 struct rt9471_chip *chip;
848 struct gpio_desc *ce_gpio;
849 struct regmap *regmap;
850 int ret;
851
852 chip = devm_kzalloc(dev, size: sizeof(*chip), GFP_KERNEL);
853 if (!chip)
854 return -ENOMEM;
855
856 chip->dev = dev;
857 mutex_init(&chip->var_lock);
858 i2c_set_clientdata(client: i2c, data: chip);
859
860 /* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
861 ce_gpio = devm_gpiod_get_optional(dev, con_id: "charge-enable", flags: GPIOD_OUT_HIGH);
862 if (IS_ERR(ptr: ce_gpio))
863 return dev_err_probe(dev, err: PTR_ERR(ptr: ce_gpio),
864 fmt: "Failed to config charge enable gpio\n");
865
866 regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);
867 if (IS_ERR(ptr: regmap))
868 return dev_err_probe(dev, err: PTR_ERR(ptr: regmap), fmt: "Failed to init regmap\n");
869
870 chip->regmap = regmap;
871
872 ret = devm_regmap_field_bulk_alloc(dev, regmap, field: chip->rm_fields,
873 reg_field: rt9471_reg_fields,
874 ARRAY_SIZE(rt9471_reg_fields));
875 if (ret)
876 return dev_err_probe(dev, err: ret, fmt: "Failed to alloc regmap field\n");
877
878 ret = rt9471_check_devinfo(chip);
879 if (ret)
880 return ret;
881
882 ret = regmap_register_patch(map: regmap, regs: rt9471_init_regs,
883 ARRAY_SIZE(rt9471_init_regs));
884 if (ret)
885 return dev_err_probe(dev, err: ret, fmt: "Failed to init registers\n");
886
887 ret = devm_regmap_add_irq_chip(dev, map: regmap, irq: i2c->irq,
888 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, irq_base: 0,
889 chip: &rt9471_irq_chip, data: &chip->irq_chip_data);
890 if (ret)
891 return dev_err_probe(dev, err: ret, fmt: "Failed to add IRQ chip\n");
892
893 ret = rt9471_register_psy(chip);
894 if (ret)
895 return dev_err_probe(dev, err: ret, fmt: "Failed to register psy\n");
896
897 ret = rt9471_register_otg_regulator(chip);
898 if (ret)
899 return dev_err_probe(dev, err: ret, fmt: "Failed to register otg\n");
900
901 ret = rt9471_register_interrupts(chip);
902 if (ret)
903 return ret;
904
905 /* After IRQs are all initialized, enable port detection by default */
906 return regmap_field_write(field: chip->rm_fields[F_BC12_EN], val: 1);
907}
908
909static void rt9471_shutdown(struct i2c_client *i2c)
910{
911 struct rt9471_chip *chip = i2c_get_clientdata(client: i2c);
912
913 /*
914 * There's no external reset pin. Do register reset to guarantee charger
915 * function is normal after shutdown
916 */
917 regmap_field_write(field: chip->rm_fields[F_REG_RST], val: 1);
918}
919
920static const struct of_device_id rt9471_of_device_id[] = {
921 { .compatible = "richtek,rt9471" },
922 {}
923};
924MODULE_DEVICE_TABLE(of, rt9471_of_device_id);
925
926static struct i2c_driver rt9471_driver = {
927 .driver = {
928 .name = "rt9471",
929 .of_match_table = rt9471_of_device_id,
930 },
931 .probe = rt9471_probe,
932 .shutdown = rt9471_shutdown,
933};
934module_i2c_driver(rt9471_driver);
935
936MODULE_DESCRIPTION("Richtek RT9471 charger driver");
937MODULE_AUTHOR("Alina Yu <alina_yu@richtek.com>");
938MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
939MODULE_LICENSE("GPL");
940

source code of linux/drivers/power/supply/rt9471.c