rt9471.c

  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(rt9471_chg_ranges + range, val, &sel);
213
214	return regmap_field_write(chip->rm_fields[field], 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(chip->rm_fields[field], &sel);
226	if (ret)
227		return ret;
228
229	ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &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(chip->rm_fields[F_TE], 0);
243
244	ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
245	if (ret)
246		return ret;
247
248	/* After applying the new IEOC value, enable charge termination */
249	return regmap_field_write(chip->rm_fields[F_TE], 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(chip->rm_fields[F_TE], &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, F_IEOC_CHG, RT9471_RANGE_IEOC, 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(chip->rm_fields[F_IC_STAT], &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(chip->rm_fields[F_ST_VBUS_GD], &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(&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(&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(chip->rm_fields[F_CHG_EN], !!value);
378	case POWER_SUPPLY_PROP_ONLINE:
379		return regmap_field_write(chip->rm_fields[F_HZ], !value);
380	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
381		return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value);
382	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
383		return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value);
384	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
385		return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value);
386	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
387		return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value);
388	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
389		return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value);
390	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
391		return rt9471_set_ieoc(chip, 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, pvalue);
410	case POWER_SUPPLY_PROP_ONLINE:
411		return rt9471_get_vbus_good(chip, pvalue);
412	case POWER_SUPPLY_PROP_CURRENT_MAX:
413		return rt9471_get_usb_type_current(chip, pvalue);
414	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
415		return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, 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, F_VBAT_REG, RT9471_RANGE_VCHG, 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, F_AICR, RT9471_RANGE_AICR, pvalue);
426	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
427		return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue);
428	case POWER_SUPPLY_PROP_USB_TYPE:
429		return rt9471_get_usb_type(chip, pvalue);
430	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
431		return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue);
432	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
433		return rt9471_get_ieoc(chip, 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(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(chip->rm_fields[F_ST_VBUS_GD], &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(&chip->var_lock);
472
473	power_supply_changed(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(chip->rm_fields[F_PORT_STAT], &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(&chip->var_lock);
529
530	power_supply_changed(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(chip->rm_fields[F_WDT_RST], 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(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(chip->irq_chip_data, curr->hwirq);
581		if (virq <= 0)
582			return virq;
583
584		ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler,
585						IRQF_ONESHOT, curr->name, chip);
586		if (ret)
587			return dev_err_probe(dev, ret, "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, &rt9471_otg_rdesc, &cfg);
632
633	return PTR_ERR_OR_ZERO(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(chip->rm_fields[F_BATFET_DIS], &sysoff_enable);
649	if (ret)
650		return ret;
651
652	return sysfs_emit(buf, "%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(buf, 10, &tmp);
664	if (ret)
665		return ret;
666
667	ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!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(chip->rm_fields[F_BC12_EN], &bc12_enable);
682	if (ret)
683		return ret;
684
685	return sysfs_emit(buf, "%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(buf, 10, &tmp);
697	if (ret)
698		return ret;
699
700	ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!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, "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(dev, desc, &cfg);
747
748	return PTR_ERR_OR_ZERO(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(chip->rm_fields[F_DEVICE_ID], &dev_id);
809	if (ret)
810		return dev_err_probe(dev, ret, "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, -ENODEV, "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, 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(i2c, chip);
859
860	/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
861	ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);
862	if (IS_ERR(ce_gpio))
863		return dev_err_probe(dev, PTR_ERR(ce_gpio),
864				     "Failed to config charge enable gpio\n");
865
866	regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);
867	if (IS_ERR(regmap))
868		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
869
870	chip->regmap = regmap;
871
872	ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields,
873					   rt9471_reg_fields,
874					   ARRAY_SIZE(rt9471_reg_fields));
875	if (ret)
876		return dev_err_probe(dev, ret, "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(regmap, rt9471_init_regs,
883				    ARRAY_SIZE(rt9471_init_regs));
884	if (ret)
885		return dev_err_probe(dev, ret, "Failed to init registers\n");
886
887	ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
888				       IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
889				       &rt9471_irq_chip, &chip->irq_chip_data);
890	if (ret)
891		return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
892
893	ret = rt9471_register_psy(chip);
894	if (ret)
895		return dev_err_probe(dev, ret, "Failed to register psy\n");
896
897	ret = rt9471_register_otg_regulator(chip);
898	if (ret)
899		return dev_err_probe(dev, ret, "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(chip->rm_fields[F_BC12_EN], 1);
907}
908
909static void rt9471_shutdown(struct i2c_client *i2c)
910{
911	struct rt9471_chip *chip = i2c_get_clientdata(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(chip->rm_fields[F_REG_RST], 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");