1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Driver for UCS1002 Programmable USB Port Power Controller
4 *
5 * Copyright (C) 2019 Zodiac Inflight Innovations
6 */
7 #include <linux/bits.h>
8 #include <linux/freezer.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/i2c.h>
11 #include <linux/interrupt.h>
12 #include <linux/kernel.h>
13 #include <linux/kthread.h>
14 #include <linux/device.h>
15 #include <linux/module.h>
16 #include <linux/of.h>
17 #include <linux/of_irq.h>
18 #include <linux/power_supply.h>
19 #include <linux/regmap.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/of_regulator.h>
22
23 /* UCS1002 Registers */
24 #define UCS1002_REG_CURRENT_MEASUREMENT 0x00
25
26 /*
27 * The Total Accumulated Charge registers store the total accumulated
28 * charge delivered from the VS source to a portable device. The total
29 * value is calculated using four registers, from 01h to 04h. The bit
30 * weighting of the registers is given in mA/hrs.
31 */
32 #define UCS1002_REG_TOTAL_ACC_CHARGE 0x01
33
34 /* Other Status Register */
35 #define UCS1002_REG_OTHER_STATUS 0x0f
36 # define F_ADET_PIN BIT(4)
37 # define F_CHG_ACT BIT(3)
38
39 /* Interrupt Status */
40 #define UCS1002_REG_INTERRUPT_STATUS 0x10
41 # define F_ERR BIT(7)
42 # define F_DISCHARGE_ERR BIT(6)
43 # define F_RESET BIT(5)
44 # define F_MIN_KEEP_OUT BIT(4)
45 # define F_TSD BIT(3)
46 # define F_OVER_VOLT BIT(2)
47 # define F_BACK_VOLT BIT(1)
48 # define F_OVER_ILIM BIT(0)
49
50 /* Pin Status Register */
51 #define UCS1002_REG_PIN_STATUS 0x14
52 # define UCS1002_PWR_STATE_MASK 0x03
53 # define F_PWR_EN_PIN BIT(6)
54 # define F_M2_PIN BIT(5)
55 # define F_M1_PIN BIT(4)
56 # define F_EM_EN_PIN BIT(3)
57 # define F_SEL_PIN BIT(2)
58 # define F_ACTIVE_MODE_MASK GENMASK(5, 3)
59 # define F_ACTIVE_MODE_PASSTHROUGH F_M2_PIN
60 # define F_ACTIVE_MODE_DEDICATED F_EM_EN_PIN
61 # define F_ACTIVE_MODE_BC12_DCP (F_M2_PIN | F_EM_EN_PIN)
62 # define F_ACTIVE_MODE_BC12_SDP F_M1_PIN
63 # define F_ACTIVE_MODE_BC12_CDP (F_M1_PIN | F_M2_PIN | F_EM_EN_PIN)
64
65 /* General Configuration Register */
66 #define UCS1002_REG_GENERAL_CFG 0x15
67 # define F_RATION_EN BIT(3)
68
69 /* Emulation Configuration Register */
70 #define UCS1002_REG_EMU_CFG 0x16
71
72 /* Switch Configuration Register */
73 #define UCS1002_REG_SWITCH_CFG 0x17
74 # define F_PIN_IGNORE BIT(7)
75 # define F_EM_EN_SET BIT(5)
76 # define F_M2_SET BIT(4)
77 # define F_M1_SET BIT(3)
78 # define F_S0_SET BIT(2)
79 # define F_PWR_EN_SET BIT(1)
80 # define F_LATCH_SET BIT(0)
81 # define V_SET_ACTIVE_MODE_MASK GENMASK(5, 3)
82 # define V_SET_ACTIVE_MODE_PASSTHROUGH F_M2_SET
83 # define V_SET_ACTIVE_MODE_DEDICATED F_EM_EN_SET
84 # define V_SET_ACTIVE_MODE_BC12_DCP (F_M2_SET | F_EM_EN_SET)
85 # define V_SET_ACTIVE_MODE_BC12_SDP F_M1_SET
86 # define V_SET_ACTIVE_MODE_BC12_CDP (F_M1_SET | F_M2_SET | F_EM_EN_SET)
87
88 /* Current Limit Register */
89 #define UCS1002_REG_ILIMIT 0x19
90 # define UCS1002_ILIM_SW_MASK GENMASK(3, 0)
91
92 /* Product ID */
93 #define UCS1002_REG_PRODUCT_ID 0xfd
94 # define UCS1002_PRODUCT_ID 0x4e
95
96 /* Manufacture name */
97 #define UCS1002_MANUFACTURER "SMSC"
98
99 struct ucs1002_info {
100 struct power_supply *charger;
101 struct i2c_client *client;
102 struct regmap *regmap;
103 struct regulator_desc *regulator_descriptor;
104 struct regulator_dev *rdev;
105 bool present;
106 bool output_disable;
107 struct delayed_work health_poll;
108 int health;
109
110 };
111
112 static enum power_supply_property ucs1002_props[] = {
113 POWER_SUPPLY_PROP_ONLINE,
114 POWER_SUPPLY_PROP_CHARGE_NOW,
115 POWER_SUPPLY_PROP_CURRENT_NOW,
116 POWER_SUPPLY_PROP_CURRENT_MAX,
117 POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */
118 POWER_SUPPLY_PROP_MANUFACTURER,
119 POWER_SUPPLY_PROP_USB_TYPE,
120 POWER_SUPPLY_PROP_HEALTH,
121 };
122
ucs1002_get_online(struct ucs1002_info * info,union power_supply_propval * val)123 static int ucs1002_get_online(struct ucs1002_info *info,
124 union power_supply_propval *val)
125 {
126 unsigned int reg;
127 int ret;
128
129 ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®);
130 if (ret)
131 return ret;
132
133 val->intval = !!(reg & F_CHG_ACT);
134
135 return 0;
136 }
137
ucs1002_get_charge(struct ucs1002_info * info,union power_supply_propval * val)138 static int ucs1002_get_charge(struct ucs1002_info *info,
139 union power_supply_propval *val)
140 {
141 /*
142 * To fit within 32 bits some values are rounded (uA/h)
143 *
144 * For Total Accumulated Charge Middle Low Byte register, addr
145 * 03h, byte 2
146 *
147 * B0: 0.01084 mA/h rounded to 11 uA/h
148 * B1: 0.02169 mA/h rounded to 22 uA/h
149 * B2: 0.04340 mA/h rounded to 43 uA/h
150 * B3: 0.08676 mA/h rounded to 87 uA/h
151 * B4: 0.17350 mA/h rounded to 173 uÁ/h
152 *
153 * For Total Accumulated Charge Low Byte register, addr 04h,
154 * byte 3
155 *
156 * B6: 0.00271 mA/h rounded to 3 uA/h
157 * B7: 0.005422 mA/h rounded to 5 uA/h
158 */
159 static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = {
160 /*
161 * Bit corresponding to low byte (offset 0x04)
162 * B0 B1 B2 B3 B4 B5 B6 B7
163 */
164 0, 0, 0, 0, 0, 0, 3, 5,
165 /*
166 * Bit corresponding to middle low byte (offset 0x03)
167 * B0 B1 B2 B3 B4 B5 B6 B7
168 */
169 11, 22, 43, 87, 173, 347, 694, 1388,
170 /*
171 * Bit corresponding to middle high byte (offset 0x02)
172 * B0 B1 B2 B3 B4 B5 B6 B7
173 */
174 2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400,
175 /*
176 * Bit corresponding to high byte (offset 0x01)
177 * B0 B1 B2 B3 B4 B5 B6 B7
178 */
179 710700, 1421000, 2843000, 5685000, 11371000, 22742000,
180 45484000, 90968000,
181 };
182 unsigned long total_acc_charger;
183 unsigned int reg;
184 int i, ret;
185
186 ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE,
187 ®, sizeof(u32));
188 if (ret)
189 return ret;
190
191 total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */
192 val->intval = 0;
193
194 for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh))
195 val->intval += bit_weights_uAh[i];
196
197 return 0;
198 }
199
ucs1002_get_current(struct ucs1002_info * info,union power_supply_propval * val)200 static int ucs1002_get_current(struct ucs1002_info *info,
201 union power_supply_propval *val)
202 {
203 /*
204 * The Current Measurement register stores the measured
205 * current value delivered to the portable device. The range
206 * is from 9.76 mA to 2.5 A.
207 */
208 static const int bit_weights_uA[BITS_PER_TYPE(u8)] = {
209 9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300,
210 };
211 unsigned long current_measurement;
212 unsigned int reg;
213 int i, ret;
214
215 ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, ®);
216 if (ret)
217 return ret;
218
219 current_measurement = reg;
220 val->intval = 0;
221
222 for_each_set_bit(i, ¤t_measurement, ARRAY_SIZE(bit_weights_uA))
223 val->intval += bit_weights_uA[i];
224
225 return 0;
226 }
227
228 /*
229 * The Current Limit register stores the maximum current used by the
230 * port switch. The range is from 500mA to 2.5 A.
231 */
232 static const u32 ucs1002_current_limit_uA[] = {
233 500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000,
234 };
235
ucs1002_get_max_current(struct ucs1002_info * info,union power_supply_propval * val)236 static int ucs1002_get_max_current(struct ucs1002_info *info,
237 union power_supply_propval *val)
238 {
239 unsigned int reg;
240 int ret;
241
242 if (info->output_disable) {
243 val->intval = 0;
244 return 0;
245 }
246
247 ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®);
248 if (ret)
249 return ret;
250
251 val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK];
252
253 return 0;
254 }
255
ucs1002_set_max_current(struct ucs1002_info * info,u32 val)256 static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val)
257 {
258 unsigned int reg;
259 int ret, idx;
260
261 if (val == 0) {
262 info->output_disable = true;
263 regulator_disable_regmap(info->rdev);
264 return 0;
265 }
266
267 for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) {
268 if (val == ucs1002_current_limit_uA[idx])
269 break;
270 }
271
272 if (idx == ARRAY_SIZE(ucs1002_current_limit_uA))
273 return -EINVAL;
274
275 ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx);
276 if (ret)
277 return ret;
278 /*
279 * Any current limit setting exceeding the one set via ILIM
280 * pin will be rejected, so we read out freshly changed limit
281 * to make sure that it took effect.
282 */
283 ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®);
284 if (ret)
285 return ret;
286
287 if (reg != idx)
288 return -EINVAL;
289
290 info->output_disable = false;
291
292 if (info->rdev && info->rdev->use_count &&
293 !regulator_is_enabled_regmap(info->rdev))
294 regulator_enable_regmap(info->rdev);
295
296 return 0;
297 }
298
ucs1002_set_usb_type(struct ucs1002_info * info,int val)299 static int ucs1002_set_usb_type(struct ucs1002_info *info, int val)
300 {
301 unsigned int mode;
302
303 switch (val) {
304 /*
305 * POWER_SUPPLY_USB_TYPE_UNKNOWN == 0, map this to dedicated for
306 * userspace API compatibility with older versions of this driver
307 * which mapped 0 to dedicated.
308 */
309 case POWER_SUPPLY_USB_TYPE_UNKNOWN:
310 case POWER_SUPPLY_USB_TYPE_PD:
311 mode = V_SET_ACTIVE_MODE_DEDICATED;
312 break;
313 case POWER_SUPPLY_USB_TYPE_SDP:
314 mode = V_SET_ACTIVE_MODE_BC12_SDP;
315 break;
316 case POWER_SUPPLY_USB_TYPE_DCP:
317 mode = V_SET_ACTIVE_MODE_BC12_DCP;
318 break;
319 case POWER_SUPPLY_USB_TYPE_CDP:
320 mode = V_SET_ACTIVE_MODE_BC12_CDP;
321 break;
322 default:
323 return -EINVAL;
324 }
325
326 return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
327 V_SET_ACTIVE_MODE_MASK, mode);
328 }
329
ucs1002_get_usb_type(struct ucs1002_info * info,union power_supply_propval * val)330 static int ucs1002_get_usb_type(struct ucs1002_info *info,
331 union power_supply_propval *val)
332 {
333 enum power_supply_usb_type type;
334 unsigned int reg;
335 int ret;
336
337 ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®);
338 if (ret)
339 return ret;
340
341 switch (reg & F_ACTIVE_MODE_MASK) {
342 default:
343 type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
344 break;
345 case F_ACTIVE_MODE_DEDICATED:
346 type = POWER_SUPPLY_USB_TYPE_PD;
347 break;
348 case F_ACTIVE_MODE_BC12_SDP:
349 type = POWER_SUPPLY_USB_TYPE_SDP;
350 break;
351 case F_ACTIVE_MODE_BC12_DCP:
352 type = POWER_SUPPLY_USB_TYPE_DCP;
353 break;
354 case F_ACTIVE_MODE_BC12_CDP:
355 type = POWER_SUPPLY_USB_TYPE_CDP;
356 break;
357 }
358
359 val->intval = type;
360
361 return 0;
362 }
363
ucs1002_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)364 static int ucs1002_get_property(struct power_supply *psy,
365 enum power_supply_property psp,
366 union power_supply_propval *val)
367 {
368 struct ucs1002_info *info = power_supply_get_drvdata(psy);
369
370 switch (psp) {
371 case POWER_SUPPLY_PROP_ONLINE:
372 return ucs1002_get_online(info, val);
373 case POWER_SUPPLY_PROP_CHARGE_NOW:
374 return ucs1002_get_charge(info, val);
375 case POWER_SUPPLY_PROP_CURRENT_NOW:
376 return ucs1002_get_current(info, val);
377 case POWER_SUPPLY_PROP_CURRENT_MAX:
378 return ucs1002_get_max_current(info, val);
379 case POWER_SUPPLY_PROP_USB_TYPE:
380 return ucs1002_get_usb_type(info, val);
381 case POWER_SUPPLY_PROP_HEALTH:
382 val->intval = info->health;
383 return 0;
384 case POWER_SUPPLY_PROP_PRESENT:
385 val->intval = info->present;
386 return 0;
387 case POWER_SUPPLY_PROP_MANUFACTURER:
388 val->strval = UCS1002_MANUFACTURER;
389 return 0;
390 default:
391 return -EINVAL;
392 }
393 }
394
ucs1002_set_property(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)395 static int ucs1002_set_property(struct power_supply *psy,
396 enum power_supply_property psp,
397 const union power_supply_propval *val)
398 {
399 struct ucs1002_info *info = power_supply_get_drvdata(psy);
400
401 switch (psp) {
402 case POWER_SUPPLY_PROP_CURRENT_MAX:
403 return ucs1002_set_max_current(info, val->intval);
404 case POWER_SUPPLY_PROP_USB_TYPE:
405 return ucs1002_set_usb_type(info, val->intval);
406 default:
407 return -EINVAL;
408 }
409 }
410
ucs1002_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)411 static int ucs1002_property_is_writeable(struct power_supply *psy,
412 enum power_supply_property psp)
413 {
414 switch (psp) {
415 case POWER_SUPPLY_PROP_CURRENT_MAX:
416 case POWER_SUPPLY_PROP_USB_TYPE:
417 return true;
418 default:
419 return false;
420 }
421 }
422
423 static const struct power_supply_desc ucs1002_charger_desc = {
424 .name = "ucs1002",
425 .type = POWER_SUPPLY_TYPE_USB,
426 .usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
427 BIT(POWER_SUPPLY_USB_TYPE_CDP) |
428 BIT(POWER_SUPPLY_USB_TYPE_DCP) |
429 BIT(POWER_SUPPLY_USB_TYPE_PD) |
430 BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
431 .get_property = ucs1002_get_property,
432 .set_property = ucs1002_set_property,
433 .property_is_writeable = ucs1002_property_is_writeable,
434 .properties = ucs1002_props,
435 .num_properties = ARRAY_SIZE(ucs1002_props),
436 };
437
ucs1002_health_poll(struct work_struct * work)438 static void ucs1002_health_poll(struct work_struct *work)
439 {
440 struct ucs1002_info *info = container_of(work, struct ucs1002_info,
441 health_poll.work);
442 int ret;
443 u32 reg;
444
445 ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, ®);
446 if (ret)
447 return;
448
449 /* bad health and no status change, just schedule us again in a while */
450 if ((reg & F_ERR) && info->health != POWER_SUPPLY_HEALTH_GOOD) {
451 schedule_delayed_work(&info->health_poll,
452 msecs_to_jiffies(2000));
453 return;
454 }
455
456 if (reg & F_TSD)
457 info->health = POWER_SUPPLY_HEALTH_OVERHEAT;
458 else if (reg & (F_OVER_VOLT | F_BACK_VOLT))
459 info->health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
460 else if (reg & F_OVER_ILIM)
461 info->health = POWER_SUPPLY_HEALTH_OVERCURRENT;
462 else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT))
463 info->health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
464 else
465 info->health = POWER_SUPPLY_HEALTH_GOOD;
466
467 sysfs_notify(&info->charger->dev.kobj, NULL, "health");
468 }
469
ucs1002_charger_irq(int irq,void * data)470 static irqreturn_t ucs1002_charger_irq(int irq, void *data)
471 {
472 int ret, regval;
473 bool present;
474 struct ucs1002_info *info = data;
475
476 present = info->present;
477
478 ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®val);
479 if (ret)
480 return IRQ_HANDLED;
481
482 /* update attached status */
483 info->present = regval & F_ADET_PIN;
484
485 /* notify the change */
486 if (present != info->present)
487 power_supply_changed(info->charger);
488
489 return IRQ_HANDLED;
490 }
491
ucs1002_alert_irq(int irq,void * data)492 static irqreturn_t ucs1002_alert_irq(int irq, void *data)
493 {
494 struct ucs1002_info *info = data;
495
496 mod_delayed_work(system_wq, &info->health_poll, 0);
497
498 return IRQ_HANDLED;
499 }
500
ucs1002_regulator_enable(struct regulator_dev * rdev)501 static int ucs1002_regulator_enable(struct regulator_dev *rdev)
502 {
503 struct ucs1002_info *info = rdev_get_drvdata(rdev);
504
505 /*
506 * If the output is disabled due to 0 maximum current, just pretend the
507 * enable did work. The regulator will be enabled as soon as we get a
508 * a non-zero maximum current budget.
509 */
510 if (info->output_disable)
511 return 0;
512
513 return regulator_enable_regmap(rdev);
514 }
515
516 static const struct regulator_ops ucs1002_regulator_ops = {
517 .is_enabled = regulator_is_enabled_regmap,
518 .enable = ucs1002_regulator_enable,
519 .disable = regulator_disable_regmap,
520 };
521
522 static const struct regulator_desc ucs1002_regulator_descriptor = {
523 .name = "ucs1002-vbus",
524 .ops = &ucs1002_regulator_ops,
525 .type = REGULATOR_VOLTAGE,
526 .owner = THIS_MODULE,
527 .enable_reg = UCS1002_REG_SWITCH_CFG,
528 .enable_mask = F_PWR_EN_SET,
529 .enable_val = F_PWR_EN_SET,
530 .fixed_uV = 5000000,
531 .n_voltages = 1,
532 };
533
ucs1002_probe(struct i2c_client * client)534 static int ucs1002_probe(struct i2c_client *client)
535 {
536 struct device *dev = &client->dev;
537 struct power_supply_config charger_config = {};
538 const struct regmap_config regmap_config = {
539 .reg_bits = 8,
540 .val_bits = 8,
541 };
542 struct regulator_config regulator_config = {};
543 int irq_a_det, irq_alert, ret;
544 struct ucs1002_info *info;
545 unsigned int regval;
546
547 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
548 if (!info)
549 return -ENOMEM;
550
551 info->regmap = devm_regmap_init_i2c(client, ®map_config);
552 ret = PTR_ERR_OR_ZERO(info->regmap);
553 if (ret) {
554 dev_err(dev, "Regmap initialization failed: %d\n", ret);
555 return ret;
556 }
557
558 info->client = client;
559
560 irq_a_det = of_irq_get_byname(dev->of_node, "a_det");
561 irq_alert = of_irq_get_byname(dev->of_node, "alert");
562
563 charger_config.of_node = dev->of_node;
564 charger_config.drv_data = info;
565
566 ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, ®val);
567 if (ret) {
568 dev_err(dev, "Failed to read product ID: %d\n", ret);
569 return ret;
570 }
571
572 if (regval != UCS1002_PRODUCT_ID) {
573 dev_err(dev,
574 "Product ID does not match (0x%02x != 0x%02x)\n",
575 regval, UCS1002_PRODUCT_ID);
576 return -ENODEV;
577 }
578
579 /* Enable charge rationing by default */
580 ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG,
581 F_RATION_EN, F_RATION_EN);
582 if (ret) {
583 dev_err(dev, "Failed to read general config: %d\n", ret);
584 return ret;
585 }
586
587 /*
588 * Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active
589 * mode selection to BC1.2 CDP.
590 */
591 ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG,
592 V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE,
593 V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE);
594 if (ret) {
595 dev_err(dev, "Failed to configure default mode: %d\n", ret);
596 return ret;
597 }
598 /*
599 * Be safe and set initial current limit to 500mA
600 */
601 ret = ucs1002_set_max_current(info, 500000);
602 if (ret) {
603 dev_err(dev, "Failed to set max current default: %d\n", ret);
604 return ret;
605 }
606
607 info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc,
608 &charger_config);
609 ret = PTR_ERR_OR_ZERO(info->charger);
610 if (ret) {
611 dev_err(dev, "Failed to register power supply: %d\n", ret);
612 return ret;
613 }
614
615 ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®val);
616 if (ret) {
617 dev_err(dev, "Failed to read pin status: %d\n", ret);
618 return ret;
619 }
620
621 info->regulator_descriptor =
622 devm_kmemdup(dev, &ucs1002_regulator_descriptor,
623 sizeof(ucs1002_regulator_descriptor),
624 GFP_KERNEL);
625 if (!info->regulator_descriptor)
626 return -ENOMEM;
627
628 info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN);
629
630 regulator_config.dev = dev;
631 regulator_config.of_node = dev->of_node;
632 regulator_config.regmap = info->regmap;
633 regulator_config.driver_data = info;
634
635 info->rdev = devm_regulator_register(dev, info->regulator_descriptor,
636 ®ulator_config);
637 ret = PTR_ERR_OR_ZERO(info->rdev);
638 if (ret) {
639 dev_err(dev, "Failed to register VBUS regulator: %d\n", ret);
640 return ret;
641 }
642
643 info->health = POWER_SUPPLY_HEALTH_GOOD;
644 INIT_DELAYED_WORK(&info->health_poll, ucs1002_health_poll);
645
646 if (irq_a_det > 0) {
647 ret = devm_request_threaded_irq(dev, irq_a_det, NULL,
648 ucs1002_charger_irq,
649 IRQF_ONESHOT,
650 "ucs1002-a_det", info);
651 if (ret) {
652 dev_err(dev, "Failed to request A_DET threaded irq: %d\n",
653 ret);
654 return ret;
655 }
656 }
657
658 if (irq_alert > 0) {
659 ret = devm_request_irq(dev, irq_alert, ucs1002_alert_irq,
660 0,"ucs1002-alert", info);
661 if (ret) {
662 dev_err(dev, "Failed to request ALERT threaded irq: %d\n",
663 ret);
664 return ret;
665 }
666 }
667
668 return 0;
669 }
670
671 static const struct of_device_id ucs1002_of_match[] = {
672 { .compatible = "microchip,ucs1002", },
673 { /* sentinel */ },
674 };
675 MODULE_DEVICE_TABLE(of, ucs1002_of_match);
676
677 static struct i2c_driver ucs1002_driver = {
678 .driver = {
679 .name = "ucs1002",
680 .of_match_table = ucs1002_of_match,
681 },
682 .probe = ucs1002_probe,
683 };
684 module_i2c_driver(ucs1002_driver);
685
686 MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller");
687 MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>");
688 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
689 MODULE_LICENSE("GPL");
690