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 | |
94 | enum 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 | |
121 | enum 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 | |
131 | enum { |
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 | |
142 | struct rt9471_chip { |
143 | struct device *dev; |
144 | struct regmap *regmap; |
145 | struct regmap_field *rm_fields[F_MAX_FIELDS]; |
146 | struct regmap_irq_chip_data *irq_chip_data; |
147 | struct regulator_dev *otg_rdev; |
148 | struct power_supply *psy; |
149 | struct power_supply_desc psy_desc; |
150 | struct mutex var_lock; |
151 | enum power_supply_usb_type psy_usb_type; |
152 | int psy_usb_curr; |
153 | }; |
154 | |
155 | static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = { |
156 | [F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 0), |
157 | [F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 1, 1), |
158 | [F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0), |
159 | [F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5), |
160 | [F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7), |
161 | [F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5), |
162 | [F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7), |
163 | [F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3), |
164 | [F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3), |
165 | [F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6), |
166 | [F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6), |
167 | [F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5), |
168 | [F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0), |
169 | [F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1), |
170 | [F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7), |
171 | [F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6), |
172 | [F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7), |
173 | [F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7), |
174 | [F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3), |
175 | [F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7), |
176 | [F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3), |
177 | [F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6), |
178 | [F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7), |
179 | }; |
180 | |
181 | static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = { |
182 | [RT9471_RANGE_AICR] = { .min = 50000, .min_sel = 1, .max_sel = 63, .step = 50000 }, |
183 | [RT9471_RANGE_MIVR] = { .min = 3900000, .min_sel = 0, .max_sel = 15, .step = 100000 }, |
184 | [RT9471_RANGE_IPRE] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 }, |
185 | [RT9471_RANGE_VCHG] = { .min = 3900000, .min_sel = 0, .max_sel = 80, .step = 10000 }, |
186 | [RT9471_RANGE_ICHG] = { .min = 0, .min_sel = 0, .max_sel = 63, .step = 50000 }, |
187 | [RT9471_RANGE_IEOC] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 }, |
188 | }; |
189 | |
190 | static int rt9471_set_value_by_field_range(struct rt9471_chip *chip, |
191 | enum rt9471_fields field, |
192 | enum rt9471_ranges range, int val) |
193 | { |
194 | unsigned int sel; |
195 | |
196 | if (val < 0) |
197 | return -EINVAL; |
198 | |
199 | linear_range_get_selector_within(r: rt9471_chg_ranges + range, val, selector: &sel); |
200 | |
201 | return regmap_field_write(field: chip->rm_fields[field], val: sel); |
202 | } |
203 | |
204 | |
205 | static int rt9471_get_value_by_field_range(struct rt9471_chip *chip, |
206 | enum rt9471_fields field, |
207 | enum rt9471_ranges range, int *val) |
208 | { |
209 | unsigned int sel, rvalue; |
210 | int ret; |
211 | |
212 | ret = regmap_field_read(field: chip->rm_fields[field], val: &sel); |
213 | if (ret) |
214 | return ret; |
215 | |
216 | ret = linear_range_get_value(r: rt9471_chg_ranges + range, selector: sel, val: &rvalue); |
217 | if (ret) |
218 | return ret; |
219 | |
220 | *val = rvalue; |
221 | return 0; |
222 | } |
223 | |
224 | static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp) |
225 | { |
226 | int ret; |
227 | |
228 | if (microamp == 0) |
229 | return regmap_field_write(field: chip->rm_fields[F_TE], val: 0); |
230 | |
231 | ret = rt9471_set_value_by_field_range(chip, field: F_IEOC_CHG, range: RT9471_RANGE_IEOC, val: microamp); |
232 | if (ret) |
233 | return ret; |
234 | |
235 | /* After applying the new IEOC value, enable charge termination */ |
236 | return regmap_field_write(field: chip->rm_fields[F_TE], val: 1); |
237 | } |
238 | |
239 | static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp) |
240 | { |
241 | unsigned int chg_term_enable; |
242 | int ret; |
243 | |
244 | ret = regmap_field_read(field: chip->rm_fields[F_TE], val: &chg_term_enable); |
245 | if (ret) |
246 | return ret; |
247 | |
248 | if (!chg_term_enable) { |
249 | *microamp = 0; |
250 | return 0; |
251 | } |
252 | |
253 | return rt9471_get_value_by_field_range(chip, field: F_IEOC_CHG, range: RT9471_RANGE_IEOC, val: microamp); |
254 | } |
255 | |
256 | static int rt9471_get_status(struct rt9471_chip *chip, int *status) |
257 | { |
258 | unsigned int chg_ready, chg_done, fault_stat; |
259 | int ret; |
260 | |
261 | ret = regmap_field_read(field: chip->rm_fields[F_ST_CHG_RDY], val: &chg_ready); |
262 | if (ret) |
263 | return ret; |
264 | |
265 | ret = regmap_field_read(field: chip->rm_fields[F_ST_CHG_DONE], val: &chg_done); |
266 | if (ret) |
267 | return ret; |
268 | |
269 | ret = regmap_read(map: chip->regmap, RT9471_REG_STAT1, val: &fault_stat); |
270 | if (ret) |
271 | return ret; |
272 | |
273 | fault_stat &= RT9471_CHGFAULT_MASK; |
274 | |
275 | if (chg_ready && chg_done) |
276 | *status = POWER_SUPPLY_STATUS_FULL; |
277 | else if (chg_ready && fault_stat) |
278 | *status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
279 | else if (chg_ready && !fault_stat) |
280 | *status = POWER_SUPPLY_STATUS_CHARGING; |
281 | else |
282 | *status = POWER_SUPPLY_STATUS_DISCHARGING; |
283 | |
284 | return 0; |
285 | } |
286 | |
287 | static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat) |
288 | { |
289 | unsigned int vbus_gd; |
290 | int ret; |
291 | |
292 | ret = regmap_field_read(field: chip->rm_fields[F_ST_VBUS_GD], val: &vbus_gd); |
293 | if (ret) |
294 | return ret; |
295 | |
296 | *stat = vbus_gd; |
297 | return 0; |
298 | } |
299 | |
300 | static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type) |
301 | { |
302 | mutex_lock(&chip->var_lock); |
303 | *usb_type = chip->psy_usb_type; |
304 | mutex_unlock(lock: &chip->var_lock); |
305 | |
306 | return 0; |
307 | } |
308 | |
309 | static int rt9471_get_usb_type_current(struct rt9471_chip *chip, |
310 | int *microamp) |
311 | { |
312 | mutex_lock(&chip->var_lock); |
313 | *microamp = chip->psy_usb_curr; |
314 | mutex_unlock(lock: &chip->var_lock); |
315 | |
316 | return 0; |
317 | } |
318 | |
319 | static enum power_supply_property rt9471_charger_properties[] = { |
320 | POWER_SUPPLY_PROP_STATUS, |
321 | POWER_SUPPLY_PROP_ONLINE, |
322 | POWER_SUPPLY_PROP_CURRENT_MAX, |
323 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, |
324 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, |
325 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, |
326 | POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
327 | POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, |
328 | POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, |
329 | POWER_SUPPLY_PROP_USB_TYPE, |
330 | POWER_SUPPLY_PROP_PRECHARGE_CURRENT, |
331 | POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, |
332 | POWER_SUPPLY_PROP_MODEL_NAME, |
333 | POWER_SUPPLY_PROP_MANUFACTURER, |
334 | }; |
335 | |
336 | static enum power_supply_usb_type rt9471_charger_usb_types[] = { |
337 | POWER_SUPPLY_USB_TYPE_UNKNOWN, |
338 | POWER_SUPPLY_USB_TYPE_SDP, |
339 | POWER_SUPPLY_USB_TYPE_DCP, |
340 | POWER_SUPPLY_USB_TYPE_CDP, |
341 | POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID, |
342 | }; |
343 | |
344 | static int rt9471_charger_property_is_writeable(struct power_supply *psy, |
345 | enum power_supply_property psp) |
346 | { |
347 | switch (psp) { |
348 | case POWER_SUPPLY_PROP_STATUS: |
349 | case POWER_SUPPLY_PROP_ONLINE: |
350 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
351 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
352 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
353 | case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: |
354 | case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: |
355 | case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
356 | return 1; |
357 | default: |
358 | return 0; |
359 | } |
360 | } |
361 | |
362 | static int rt9471_charger_set_property(struct power_supply *psy, |
363 | enum power_supply_property psp, |
364 | const union power_supply_propval *val) |
365 | { |
366 | struct rt9471_chip *chip = power_supply_get_drvdata(psy); |
367 | int value = val->intval; |
368 | |
369 | switch (psp) { |
370 | case POWER_SUPPLY_PROP_STATUS: |
371 | return regmap_field_write(field: chip->rm_fields[F_CHG_EN], val: !!value); |
372 | case POWER_SUPPLY_PROP_ONLINE: |
373 | return regmap_field_write(field: chip->rm_fields[F_HZ], val: !value); |
374 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
375 | return rt9471_set_value_by_field_range(chip, field: F_ICHG_REG, range: RT9471_RANGE_ICHG, val: value); |
376 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
377 | return rt9471_set_value_by_field_range(chip, field: F_VBAT_REG, range: RT9471_RANGE_VCHG, val: value); |
378 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
379 | return rt9471_set_value_by_field_range(chip, field: F_AICR, range: RT9471_RANGE_AICR, val: value); |
380 | case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: |
381 | return rt9471_set_value_by_field_range(chip, field: F_MIVR, range: RT9471_RANGE_MIVR, val: value); |
382 | case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: |
383 | return rt9471_set_value_by_field_range(chip, field: F_IPRE_CHG, range: RT9471_RANGE_IPRE, val: value); |
384 | case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
385 | return rt9471_set_ieoc(chip, microamp: val->intval); |
386 | default: |
387 | return -EINVAL; |
388 | } |
389 | } |
390 | |
391 | static const char * const rt9471_manufacturer = "Richtek Technology Corp." ; |
392 | static const char * const rt9471_model = "RT9471" ; |
393 | |
394 | static int rt9471_charger_get_property(struct power_supply *psy, |
395 | enum power_supply_property psp, |
396 | union power_supply_propval *val) |
397 | { |
398 | struct rt9471_chip *chip = power_supply_get_drvdata(psy); |
399 | int *pvalue = &val->intval; |
400 | |
401 | switch (psp) { |
402 | case POWER_SUPPLY_PROP_STATUS: |
403 | return rt9471_get_status(chip, status: pvalue); |
404 | case POWER_SUPPLY_PROP_ONLINE: |
405 | return rt9471_get_vbus_good(chip, stat: pvalue); |
406 | case POWER_SUPPLY_PROP_CURRENT_MAX: |
407 | return rt9471_get_usb_type_current(chip, microamp: pvalue); |
408 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
409 | return rt9471_get_value_by_field_range(chip, field: F_ICHG_REG, range: RT9471_RANGE_ICHG, val: pvalue); |
410 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
411 | *pvalue = RT9471_ICHG_MAXUA; |
412 | return 0; |
413 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
414 | return rt9471_get_value_by_field_range(chip, field: F_VBAT_REG, range: RT9471_RANGE_VCHG, val: pvalue); |
415 | case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
416 | val->intval = RT9471_VCHG_MAXUV; |
417 | return 0; |
418 | case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
419 | return rt9471_get_value_by_field_range(chip, field: F_AICR, range: RT9471_RANGE_AICR, val: pvalue); |
420 | case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: |
421 | return rt9471_get_value_by_field_range(chip, field: F_MIVR, range: RT9471_RANGE_MIVR, val: pvalue); |
422 | case POWER_SUPPLY_PROP_USB_TYPE: |
423 | return rt9471_get_usb_type(chip, usb_type: pvalue); |
424 | case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: |
425 | return rt9471_get_value_by_field_range(chip, field: F_IPRE_CHG, range: RT9471_RANGE_IPRE, val: pvalue); |
426 | case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
427 | return rt9471_get_ieoc(chip, microamp: pvalue); |
428 | case POWER_SUPPLY_PROP_MODEL_NAME: |
429 | val->strval = rt9471_model; |
430 | return 0; |
431 | case POWER_SUPPLY_PROP_MANUFACTURER: |
432 | val->strval = rt9471_manufacturer; |
433 | return 0; |
434 | default: |
435 | return -ENODATA; |
436 | } |
437 | } |
438 | |
439 | static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid) |
440 | { |
441 | struct rt9471_chip *chip = devid; |
442 | |
443 | power_supply_changed(psy: chip->psy); |
444 | |
445 | return IRQ_HANDLED; |
446 | } |
447 | |
448 | static irqreturn_t rt9471_detach_handler(int irqno, void *devid) |
449 | { |
450 | struct rt9471_chip *chip = devid; |
451 | unsigned int vbus_gd; |
452 | int ret; |
453 | |
454 | ret = regmap_field_read(field: chip->rm_fields[F_ST_VBUS_GD], val: &vbus_gd); |
455 | if (ret) |
456 | return IRQ_NONE; |
457 | |
458 | /* Only focus on really detached */ |
459 | if (vbus_gd) |
460 | return IRQ_HANDLED; |
461 | |
462 | mutex_lock(&chip->var_lock); |
463 | chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; |
464 | chip->psy_usb_curr = 0; |
465 | mutex_unlock(lock: &chip->var_lock); |
466 | |
467 | power_supply_changed(psy: chip->psy); |
468 | |
469 | return IRQ_HANDLED; |
470 | } |
471 | |
472 | static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid) |
473 | { |
474 | struct rt9471_chip *chip = devid; |
475 | enum power_supply_usb_type usb_type; |
476 | unsigned int port_stat; |
477 | int usb_curr, ret; |
478 | |
479 | ret = regmap_field_read(field: chip->rm_fields[F_PORT_STAT], val: &port_stat); |
480 | if (ret) |
481 | return IRQ_NONE; |
482 | |
483 | switch (port_stat) { |
484 | case RT9471_PORTSTAT_APPLE_10W: |
485 | usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; |
486 | usb_curr = 2000000; |
487 | break; |
488 | case RT9471_PORTSTAT_APPLE_5W: |
489 | usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; |
490 | usb_curr = 1000000; |
491 | break; |
492 | case RT9471_PORTSTAT_APPLE_12W: |
493 | usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; |
494 | usb_curr = 2400000; |
495 | break; |
496 | case RT9471_PORTSTAT_SAMSUNG_10W: |
497 | usb_type = POWER_SUPPLY_USB_TYPE_DCP; |
498 | usb_curr = 2000000; |
499 | break; |
500 | case RT9471_PORTSTAT_DCP: |
501 | usb_type = POWER_SUPPLY_USB_TYPE_DCP; |
502 | usb_curr = 1500000; |
503 | break; |
504 | case RT9471_PORTSTAT_NSTD: |
505 | case RT9471_PORTSTAT_SDP: |
506 | usb_type = POWER_SUPPLY_USB_TYPE_SDP; |
507 | usb_curr = 500000; |
508 | break; |
509 | case RT9471_PORTSTAT_CDP: |
510 | usb_type = POWER_SUPPLY_USB_TYPE_CDP; |
511 | usb_curr = 1500000; |
512 | break; |
513 | default: |
514 | usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; |
515 | usb_curr = 0; |
516 | break; |
517 | } |
518 | |
519 | mutex_lock(&chip->var_lock); |
520 | chip->psy_usb_type = usb_type; |
521 | chip->psy_usb_curr = usb_curr; |
522 | mutex_unlock(lock: &chip->var_lock); |
523 | |
524 | power_supply_changed(psy: chip->psy); |
525 | |
526 | return IRQ_HANDLED; |
527 | } |
528 | |
529 | static irqreturn_t rt9471_wdt_handler(int irqno, void *devid) |
530 | { |
531 | struct rt9471_chip *chip = devid; |
532 | int ret; |
533 | |
534 | ret = regmap_field_write(field: chip->rm_fields[F_WDT_RST], val: 1); |
535 | |
536 | return ret ? IRQ_NONE : IRQ_HANDLED; |
537 | } |
538 | |
539 | static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid) |
540 | { |
541 | struct rt9471_chip *chip = devid; |
542 | |
543 | regulator_notifier_call_chain(rdev: chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL); |
544 | |
545 | return IRQ_HANDLED; |
546 | } |
547 | |
548 | #define RT9471_IRQ_DESC(_name, _hwirq) \ |
549 | { \ |
550 | .name = #_name, \ |
551 | .hwirq = _hwirq, \ |
552 | .handler = rt9471_##_name##_handler, \ |
553 | } |
554 | |
555 | static int rt9471_register_interrupts(struct rt9471_chip *chip) |
556 | { |
557 | struct device *dev = chip->dev; |
558 | static const struct { |
559 | char *name; |
560 | int hwirq; |
561 | irq_handler_t handler; |
562 | } chg_irqs[] = { |
563 | RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD), |
564 | RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH), |
565 | RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE), |
566 | RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT), |
567 | RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT), |
568 | }, *curr; |
569 | int i, virq, ret; |
570 | |
571 | for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) { |
572 | curr = chg_irqs + i; |
573 | |
574 | virq = regmap_irq_get_virq(data: chip->irq_chip_data, irq: curr->hwirq); |
575 | if (virq <= 0) |
576 | return virq; |
577 | |
578 | ret = devm_request_threaded_irq(dev, irq: virq, NULL, thread_fn: curr->handler, |
579 | IRQF_ONESHOT, devname: curr->name, dev_id: chip); |
580 | if (ret) |
581 | return dev_err_probe(dev, err: ret, fmt: "Failed to register IRQ (%s)\n" , |
582 | curr->name); |
583 | } |
584 | |
585 | return 0; |
586 | } |
587 | |
588 | static const struct regulator_ops rt9471_otg_ops = { |
589 | .enable = regulator_enable_regmap, |
590 | .disable = regulator_disable_regmap, |
591 | .is_enabled = regulator_is_enabled_regmap, |
592 | .list_voltage = regulator_list_voltage_linear, |
593 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
594 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
595 | .set_current_limit = regulator_set_current_limit_regmap, |
596 | .get_current_limit = regulator_get_current_limit_regmap, |
597 | }; |
598 | |
599 | static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, }; |
600 | |
601 | static const struct regulator_desc rt9471_otg_rdesc = { |
602 | .of_match = of_match_ptr("usb-otg-vbus-regulator" ), |
603 | .name = "rt9471-otg-vbus" , |
604 | .owner = THIS_MODULE, |
605 | .type = REGULATOR_VOLTAGE, |
606 | .ops = &rt9471_otg_ops, |
607 | .min_uV = RT9471_OTGCV_MINUV, |
608 | .uV_step = RT9471_OTGCV_STEPUV, |
609 | .n_voltages = RT9471_NUM_VOTG, |
610 | .curr_table = rt9471_otg_microamp, |
611 | .n_current_limits = ARRAY_SIZE(rt9471_otg_microamp), |
612 | .enable_mask = RT9471_OTGEN_MASK, |
613 | .enable_reg = RT9471_REG_FUNC, |
614 | .vsel_reg = RT9471_REG_OTGCFG, |
615 | .vsel_mask = RT9471_OTGCV_MASK, |
616 | .csel_reg = RT9471_REG_OTGCFG, |
617 | .csel_mask = RT9471_OTGCC_MASK, |
618 | }; |
619 | |
620 | static int rt9471_register_otg_regulator(struct rt9471_chip *chip) |
621 | { |
622 | struct device *dev = chip->dev; |
623 | struct regulator_config cfg = { .dev = dev, .driver_data = chip }; |
624 | |
625 | chip->otg_rdev = devm_regulator_register(dev, regulator_desc: &rt9471_otg_rdesc, config: &cfg); |
626 | |
627 | return PTR_ERR_OR_ZERO(ptr: chip->otg_rdev); |
628 | } |
629 | |
630 | static inline struct rt9471_chip *psy_device_to_chip(struct device *dev) |
631 | { |
632 | return power_supply_get_drvdata(to_power_supply(dev)); |
633 | } |
634 | |
635 | static ssize_t sysoff_enable_show(struct device *dev, |
636 | struct device_attribute *attr, char *buf) |
637 | { |
638 | struct rt9471_chip *chip = psy_device_to_chip(dev); |
639 | unsigned int sysoff_enable; |
640 | int ret; |
641 | |
642 | ret = regmap_field_read(field: chip->rm_fields[F_BATFET_DIS], val: &sysoff_enable); |
643 | if (ret) |
644 | return ret; |
645 | |
646 | return sysfs_emit(buf, fmt: "%d\n" , sysoff_enable); |
647 | } |
648 | |
649 | static ssize_t sysoff_enable_store(struct device *dev, |
650 | struct device_attribute *attr, |
651 | const char *buf, size_t count) |
652 | { |
653 | struct rt9471_chip *chip = psy_device_to_chip(dev); |
654 | unsigned int tmp; |
655 | int ret; |
656 | |
657 | ret = kstrtouint(s: buf, base: 10, res: &tmp); |
658 | if (ret) |
659 | return ret; |
660 | |
661 | ret = regmap_field_write(field: chip->rm_fields[F_BATFET_DIS], val: !!tmp); |
662 | if (ret) |
663 | return ret; |
664 | |
665 | return count; |
666 | } |
667 | |
668 | static ssize_t port_detect_enable_show(struct device *dev, |
669 | struct device_attribute *attr, char *buf) |
670 | { |
671 | struct rt9471_chip *chip = psy_device_to_chip(dev); |
672 | unsigned int bc12_enable; |
673 | int ret; |
674 | |
675 | ret = regmap_field_read(field: chip->rm_fields[F_BC12_EN], val: &bc12_enable); |
676 | if (ret) |
677 | return ret; |
678 | |
679 | return sysfs_emit(buf, fmt: "%d\n" , bc12_enable); |
680 | } |
681 | |
682 | static ssize_t port_detect_enable_store(struct device *dev, |
683 | struct device_attribute *attr, |
684 | const char *buf, size_t count) |
685 | { |
686 | struct rt9471_chip *chip = psy_device_to_chip(dev); |
687 | unsigned int tmp; |
688 | int ret; |
689 | |
690 | ret = kstrtouint(s: buf, base: 10, res: &tmp); |
691 | if (ret) |
692 | return ret; |
693 | |
694 | ret = regmap_field_write(field: chip->rm_fields[F_BC12_EN], val: !!tmp); |
695 | if (ret) |
696 | return ret; |
697 | |
698 | return count; |
699 | } |
700 | |
701 | static DEVICE_ATTR_RW(sysoff_enable); |
702 | static DEVICE_ATTR_RW(port_detect_enable); |
703 | |
704 | static struct attribute *rt9471_sysfs_attrs[] = { |
705 | &dev_attr_sysoff_enable.attr, |
706 | &dev_attr_port_detect_enable.attr, |
707 | NULL |
708 | }; |
709 | |
710 | ATTRIBUTE_GROUPS(rt9471_sysfs); |
711 | |
712 | static int rt9471_register_psy(struct rt9471_chip *chip) |
713 | { |
714 | struct device *dev = chip->dev; |
715 | struct power_supply_desc *desc = &chip->psy_desc; |
716 | struct power_supply_config cfg = {}; |
717 | char *psy_name; |
718 | |
719 | cfg.drv_data = chip; |
720 | cfg.of_node = dev->of_node; |
721 | cfg.attr_grp = rt9471_sysfs_groups; |
722 | |
723 | psy_name = devm_kasprintf(dev, GFP_KERNEL, fmt: "rt9471-%s" , dev_name(dev)); |
724 | if (!psy_name) |
725 | return -ENOMEM; |
726 | |
727 | desc->name = psy_name; |
728 | desc->type = POWER_SUPPLY_TYPE_USB; |
729 | desc->usb_types = rt9471_charger_usb_types; |
730 | desc->num_usb_types = ARRAY_SIZE(rt9471_charger_usb_types); |
731 | desc->properties = rt9471_charger_properties; |
732 | desc->num_properties = ARRAY_SIZE(rt9471_charger_properties); |
733 | desc->get_property = rt9471_charger_get_property; |
734 | desc->set_property = rt9471_charger_set_property; |
735 | desc->property_is_writeable = rt9471_charger_property_is_writeable; |
736 | |
737 | chip->psy = devm_power_supply_register(parent: dev, desc, cfg: &cfg); |
738 | |
739 | return PTR_ERR_OR_ZERO(ptr: chip->psy); |
740 | } |
741 | |
742 | static const struct regmap_irq rt9471_regmap_irqs[] = { |
743 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8), |
744 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8), |
745 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8), |
746 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8), |
747 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8), |
748 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8), |
749 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8), |
750 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8), |
751 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8), |
752 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8), |
753 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8), |
754 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8), |
755 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8), |
756 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8), |
757 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8), |
758 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8), |
759 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8), |
760 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8), |
761 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8), |
762 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8), |
763 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8), |
764 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8), |
765 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8), |
766 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8), |
767 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8), |
768 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8), |
769 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8), |
770 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8), |
771 | REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8), |
772 | }; |
773 | |
774 | static const struct regmap_irq_chip rt9471_irq_chip = { |
775 | .name = "rt9471-irqs" , |
776 | .status_base = RT9471_REG_IRQ0, |
777 | .mask_base = RT9471_REG_MASK0, |
778 | .num_regs = RT9471_NUM_IRQ_REGS, |
779 | .irqs = rt9471_regmap_irqs, |
780 | .num_irqs = ARRAY_SIZE(rt9471_regmap_irqs), |
781 | }; |
782 | |
783 | static const struct reg_sequence rt9471_init_regs[] = { |
784 | REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */ |
785 | REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */ |
786 | REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */ |
787 | REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */ |
788 | REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */ |
789 | REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */ |
790 | REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */ |
791 | }; |
792 | |
793 | static int rt9471_check_devinfo(struct rt9471_chip *chip) |
794 | { |
795 | struct device *dev = chip->dev; |
796 | unsigned int dev_id; |
797 | int ret; |
798 | |
799 | ret = regmap_field_read(field: chip->rm_fields[F_DEVICE_ID], val: &dev_id); |
800 | if (ret) |
801 | return dev_err_probe(dev, err: ret, fmt: "Failed to read device_id\n" ); |
802 | |
803 | switch (dev_id) { |
804 | case RT9470_DEVID: |
805 | case RT9470D_DEVID: |
806 | case RT9471_DEVID: |
807 | case RT9471D_DEVID: |
808 | return 0; |
809 | default: |
810 | return dev_err_probe(dev, err: -ENODEV, fmt: "Incorrect device id\n" ); |
811 | } |
812 | } |
813 | |
814 | static bool rt9471_accessible_reg(struct device *dev, unsigned int reg) |
815 | { |
816 | switch (reg) { |
817 | case 0x00 ... 0x0F: |
818 | case 0x10 ... 0x13: |
819 | case 0x20 ... 0x33: |
820 | case 0x40 ... 0xA1: |
821 | return true; |
822 | default: |
823 | return false; |
824 | } |
825 | } |
826 | |
827 | static const struct regmap_config rt9471_regmap_config = { |
828 | .reg_bits = 8, |
829 | .val_bits = 8, |
830 | .max_register = 0xA1, |
831 | .writeable_reg = rt9471_accessible_reg, |
832 | .readable_reg = rt9471_accessible_reg, |
833 | }; |
834 | |
835 | static int rt9471_probe(struct i2c_client *i2c) |
836 | { |
837 | struct device *dev = &i2c->dev; |
838 | struct rt9471_chip *chip; |
839 | struct gpio_desc *ce_gpio; |
840 | struct regmap *regmap; |
841 | int ret; |
842 | |
843 | chip = devm_kzalloc(dev, size: sizeof(*chip), GFP_KERNEL); |
844 | if (!chip) |
845 | return -ENOMEM; |
846 | |
847 | chip->dev = dev; |
848 | mutex_init(&chip->var_lock); |
849 | i2c_set_clientdata(client: i2c, data: chip); |
850 | |
851 | /* Default pull charge enable gpio to make 'CHG_EN' by SW control only */ |
852 | ce_gpio = devm_gpiod_get_optional(dev, con_id: "charge-enable" , flags: GPIOD_OUT_HIGH); |
853 | if (IS_ERR(ptr: ce_gpio)) |
854 | return dev_err_probe(dev, err: PTR_ERR(ptr: ce_gpio), |
855 | fmt: "Failed to config charge enable gpio\n" ); |
856 | |
857 | regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config); |
858 | if (IS_ERR(ptr: regmap)) |
859 | return dev_err_probe(dev, err: PTR_ERR(ptr: regmap), fmt: "Failed to init regmap\n" ); |
860 | |
861 | chip->regmap = regmap; |
862 | |
863 | ret = devm_regmap_field_bulk_alloc(dev, regmap, field: chip->rm_fields, |
864 | reg_field: rt9471_reg_fields, |
865 | ARRAY_SIZE(rt9471_reg_fields)); |
866 | if (ret) |
867 | return dev_err_probe(dev, err: ret, fmt: "Failed to alloc regmap field\n" ); |
868 | |
869 | ret = rt9471_check_devinfo(chip); |
870 | if (ret) |
871 | return ret; |
872 | |
873 | ret = regmap_register_patch(map: regmap, regs: rt9471_init_regs, |
874 | ARRAY_SIZE(rt9471_init_regs)); |
875 | if (ret) |
876 | return dev_err_probe(dev, err: ret, fmt: "Failed to init registers\n" ); |
877 | |
878 | ret = devm_regmap_add_irq_chip(dev, map: regmap, irq: i2c->irq, |
879 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, irq_base: 0, |
880 | chip: &rt9471_irq_chip, data: &chip->irq_chip_data); |
881 | if (ret) |
882 | return dev_err_probe(dev, err: ret, fmt: "Failed to add IRQ chip\n" ); |
883 | |
884 | ret = rt9471_register_psy(chip); |
885 | if (ret) |
886 | return dev_err_probe(dev, err: ret, fmt: "Failed to register psy\n" ); |
887 | |
888 | ret = rt9471_register_otg_regulator(chip); |
889 | if (ret) |
890 | return dev_err_probe(dev, err: ret, fmt: "Failed to register otg\n" ); |
891 | |
892 | ret = rt9471_register_interrupts(chip); |
893 | if (ret) |
894 | return ret; |
895 | |
896 | /* After IRQs are all initialized, enable port detection by default */ |
897 | return regmap_field_write(field: chip->rm_fields[F_BC12_EN], val: 1); |
898 | } |
899 | |
900 | static void rt9471_shutdown(struct i2c_client *i2c) |
901 | { |
902 | struct rt9471_chip *chip = i2c_get_clientdata(client: i2c); |
903 | |
904 | /* |
905 | * There's no external reset pin. Do register reset to guarantee charger |
906 | * function is normal after shutdown |
907 | */ |
908 | regmap_field_write(field: chip->rm_fields[F_REG_RST], val: 1); |
909 | } |
910 | |
911 | static const struct of_device_id rt9471_of_device_id[] = { |
912 | { .compatible = "richtek,rt9471" }, |
913 | {} |
914 | }; |
915 | MODULE_DEVICE_TABLE(of, rt9471_of_device_id); |
916 | |
917 | static struct i2c_driver rt9471_driver = { |
918 | .driver = { |
919 | .name = "rt9471" , |
920 | .of_match_table = rt9471_of_device_id, |
921 | }, |
922 | .probe = rt9471_probe, |
923 | .shutdown = rt9471_shutdown, |
924 | }; |
925 | module_i2c_driver(rt9471_driver); |
926 | |
927 | MODULE_DESCRIPTION("Richtek RT9471 charger driver" ); |
928 | MODULE_AUTHOR("Alina Yu <alina_yu@richtek.com>" ); |
929 | MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>" ); |
930 | MODULE_LICENSE("GPL" ); |
931 | |