1 // SPDX-License-Identifier: GPL-2.0-only
3 * Motorola CPCAP PMIC battery charger driver
5 * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
7 * Rewritten for Linux power framework with some parts based on
8 * on earlier driver found in the Motorola Linux kernel:
10 * Copyright (C) 2009-2010 Motorola, Inc.
13 #include <linux/atomic.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/err.h>
18 #include <linux/interrupt.h>
19 #include <linux/notifier.h>
21 #include <linux/of_platform.h>
22 #include <linux/platform_device.h>
23 #include <linux/power_supply.h>
24 #include <linux/regmap.h>
26 #include <linux/gpio/consumer.h>
27 #include <linux/usb/phy_companion.h>
28 #include <linux/phy/omap_usb.h>
29 #include <linux/usb/otg.h>
30 #include <linux/iio/consumer.h>
31 #include <linux/mfd/motorola-cpcap.h>
34 * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
35 * see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
36 * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
37 * and values for CPCAP are different, but some of the internal components seem
38 * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
39 * bits that seem to describe the CRM register.
41 #define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
42 #define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
43 #define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */
44 #define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */
45 #define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */
46 #define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
47 #define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */
48 #define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */
49 #define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */
50 #define CPCAP_REG_CRM_VCHRG2 BIT(6)
51 #define CPCAP_REG_CRM_VCHRG1 BIT(5)
52 #define CPCAP_REG_CRM_VCHRG0 BIT(4)
53 #define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */
54 #define CPCAP_REG_CRM_ICHRG2 BIT(2)
55 #define CPCAP_REG_CRM_ICHRG1 BIT(1)
56 #define CPCAP_REG_CRM_ICHRG0 BIT(0)
58 /* CPCAP_REG_CRM trickle charge voltages */
59 #define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
60 #define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
61 #define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
62 #define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
63 #define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
66 * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
67 * Note that these register bits don't match MC13783UG.pdf VCHRG
70 #define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
71 #define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
72 #define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
73 #define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
74 #define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
75 #define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
76 #define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
77 #define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
78 #define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
79 #define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
80 #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
81 #define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
82 #define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
83 #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
84 #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
85 #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
86 #define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
89 * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
90 * values in "Table 8-3. Charge Path Regulator Current Limit
91 * Characteristics" for the nominal values.
93 #define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
94 #define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
95 #define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
96 #define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
97 #define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
98 #define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
99 #define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
100 #define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
101 #define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
102 #define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
103 #define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
104 #define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
105 #define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
106 #define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
107 #define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
108 #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
109 #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
111 /* CPCAP_REG_VUSBC register bits needed for VBUS */
112 #define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */
115 CPCAP_CHARGER_IIO_BATTDET,
116 CPCAP_CHARGER_IIO_VOLTAGE,
117 CPCAP_CHARGER_IIO_VBUS,
118 CPCAP_CHARGER_IIO_CHRG_CURRENT,
119 CPCAP_CHARGER_IIO_BATT_CURRENT,
120 CPCAP_CHARGER_IIO_NR,
124 CPCAP_CHARGER_DISCONNECTED,
125 CPCAP_CHARGER_DETECTING,
126 CPCAP_CHARGER_CHARGING,
130 struct cpcap_charger_ddata {
133 struct list_head irq_list;
134 struct delayed_work detect_work;
135 struct delayed_work vbus_work;
136 struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */
138 struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
140 struct power_supply *usb;
142 struct phy_companion comparator; /* For USB VBUS */
143 unsigned int vbus_enabled:1;
144 unsigned int feeding_vbus:1;
152 struct cpcap_interrupt_desc {
154 struct list_head node;
158 struct cpcap_charger_ints_state {
172 static enum power_supply_property cpcap_charger_props[] = {
173 POWER_SUPPLY_PROP_STATUS,
174 POWER_SUPPLY_PROP_ONLINE,
175 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
176 POWER_SUPPLY_PROP_VOLTAGE_NOW,
177 POWER_SUPPLY_PROP_CURRENT_NOW,
180 /* No battery always shows temperature of -40000 */
181 static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata)
183 struct iio_channel *channel;
184 int error, temperature;
186 channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET];
187 error = iio_read_channel_processed(channel, &temperature);
189 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
194 return temperature > -20000 && temperature < 60000;
197 static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
199 struct iio_channel *channel;
200 int error, value = 0;
202 channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
203 error = iio_read_channel_processed(channel, &value);
205 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
213 static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
215 struct iio_channel *channel;
216 int error, value = 0;
218 channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
219 error = iio_read_channel_processed(channel, &value);
221 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
229 static int cpcap_charger_get_property(struct power_supply *psy,
230 enum power_supply_property psp,
231 union power_supply_propval *val)
233 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
236 case POWER_SUPPLY_PROP_STATUS:
237 val->intval = ddata->status;
239 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
240 val->intval = ddata->voltage;
242 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
243 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
244 val->intval = cpcap_charger_get_charge_voltage(ddata) *
249 case POWER_SUPPLY_PROP_CURRENT_NOW:
250 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
251 val->intval = cpcap_charger_get_charge_current(ddata) *
256 case POWER_SUPPLY_PROP_ONLINE:
257 val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
266 static int cpcap_charger_match_voltage(int voltage)
269 case 0 ... 4100000 - 1: return 3800000;
270 case 4100000 ... 4120000 - 1: return 4100000;
271 case 4120000 ... 4150000 - 1: return 4120000;
272 case 4150000 ... 4170000 - 1: return 4150000;
273 case 4170000 ... 4200000 - 1: return 4170000;
274 case 4200000 ... 4230000 - 1: return 4200000;
275 case 4230000 ... 4250000 - 1: return 4230000;
276 case 4250000 ... 4270000 - 1: return 4250000;
277 case 4270000 ... 4300000 - 1: return 4270000;
278 case 4300000 ... 4330000 - 1: return 4300000;
279 case 4330000 ... 4350000 - 1: return 4330000;
280 case 4350000 ... 4380000 - 1: return 4350000;
281 case 4380000 ... 4400000 - 1: return 4380000;
282 case 4400000 ... 4420000 - 1: return 4400000;
283 case 4420000 ... 4440000 - 1: return 4420000;
284 case 4440000: return 4440000;
290 cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata)
292 union power_supply_propval prop;
293 struct power_supply *battery;
294 int voltage = ddata->voltage;
297 battery = power_supply_get_by_name("battery");
299 error = power_supply_get_property(battery,
300 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
303 voltage = prop.intval;
305 power_supply_put(battery);
311 static int cpcap_charger_set_property(struct power_supply *psy,
312 enum power_supply_property psp,
313 const union power_supply_propval *val)
315 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
316 int voltage, batvolt;
319 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
320 voltage = cpcap_charger_match_voltage(val->intval);
321 batvolt = cpcap_charger_get_bat_const_charge_voltage(ddata);
322 if (voltage > batvolt)
324 ddata->voltage = voltage;
325 schedule_delayed_work(&ddata->detect_work, 0);
334 static int cpcap_charger_property_is_writeable(struct power_supply *psy,
335 enum power_supply_property psp)
338 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
345 static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
351 gpiod_set_value(ddata->gpio[0], enabled);
354 static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
360 gpiod_set_value(ddata->gpio[1], enabled);
363 static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata,
364 int max_voltage, int charge_current,
370 enable = (charge_current || trickle_current);
371 dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable);
374 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
376 CPCAP_REG_CRM_FET_OVRD |
377 CPCAP_REG_CRM_FET_CTRL);
379 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
383 ddata->status = POWER_SUPPLY_STATUS_DISCHARGING;
388 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
389 CPCAP_REG_CRM_CHRG_LED_EN |
391 CPCAP_REG_CRM_FET_OVRD |
392 CPCAP_REG_CRM_FET_CTRL |
396 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN;
400 ddata->status = POWER_SUPPLY_STATUS_CHARGING;
405 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
410 static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
412 int error, value = 0;
413 struct iio_channel *channel =
414 ddata->channels[CPCAP_CHARGER_IIO_VBUS];
416 error = iio_read_channel_processed(channel, &value);
418 return value > 3900 ? true : false;
420 dev_err(ddata->dev, "error reading VBUS: %i\n", error);
425 /* VBUS control functions for the USB PHY companion */
426 static void cpcap_charger_vbus_work(struct work_struct *work)
428 struct cpcap_charger_ddata *ddata;
432 ddata = container_of(work, struct cpcap_charger_ddata,
435 if (ddata->vbus_enabled) {
436 vbus = cpcap_charger_vbus_valid(ddata);
438 dev_info(ddata->dev, "VBUS already provided\n");
443 ddata->feeding_vbus = true;
444 cpcap_charger_set_cable_path(ddata, false);
445 cpcap_charger_set_inductive_path(ddata, false);
447 error = cpcap_charger_set_state(ddata, 0, 0, 0);
451 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
452 CPCAP_BIT_VBUS_SWITCH,
453 CPCAP_BIT_VBUS_SWITCH);
457 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
458 CPCAP_REG_CRM_RVRSMODE,
459 CPCAP_REG_CRM_RVRSMODE);
463 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
464 CPCAP_BIT_VBUS_SWITCH, 0);
468 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
469 CPCAP_REG_CRM_RVRSMODE, 0);
473 cpcap_charger_set_cable_path(ddata, true);
474 cpcap_charger_set_inductive_path(ddata, true);
475 ddata->feeding_vbus = false;
481 dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
482 ddata->vbus_enabled ? "enable" : "disable", error);
485 static int cpcap_charger_set_vbus(struct phy_companion *comparator,
488 struct cpcap_charger_ddata *ddata =
489 container_of(comparator, struct cpcap_charger_ddata,
492 ddata->vbus_enabled = enabled;
493 schedule_delayed_work(&ddata->vbus_work, 0);
498 /* Charger interrupt handling functions */
500 static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
501 struct cpcap_charger_ints_state *s)
505 error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
509 s->chrg_det = val & BIT(13);
510 s->rvrs_chrg = val & BIT(12);
511 s->vbusov = val & BIT(11);
513 error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
517 s->chrg_se1b = val & BIT(13);
518 s->rvrs_mode = val & BIT(6);
519 s->chrgcurr2 = val & BIT(5);
520 s->chrgcurr1 = val & BIT(4);
521 s->vbusvld = val & BIT(3);
523 error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
527 s->battdetb = val & BIT(6);
532 static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata,
537 if (state > CPCAP_CHARGER_DONE) {
538 dev_warn(ddata->dev, "unknown state: %i\n", state);
543 ddata->state = state;
546 case CPCAP_CHARGER_DISCONNECTED:
547 status = "DISCONNECTED";
549 case CPCAP_CHARGER_DETECTING:
550 status = "DETECTING";
552 case CPCAP_CHARGER_CHARGING:
555 case CPCAP_CHARGER_DONE:
562 dev_dbg(ddata->dev, "state: %s\n", status);
565 static int cpcap_charger_voltage_to_regval(int voltage)
570 case 0 ... 4100000 - 1:
572 case 4100000 ... 4200000 - 1:
575 case 4200000 ... 4300000 - 1:
578 case 4300000 ... 4380000 - 1:
581 case 4380000 ... 4440000:
588 return ((voltage - 4100000) / 20000) + offset;
591 static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata,
592 int state, unsigned long delay)
596 error = cpcap_charger_set_state(ddata, 0, 0, 0);
600 cpcap_charger_update_state(ddata, state);
601 power_supply_changed(ddata->usb);
602 schedule_delayed_work(&ddata->detect_work, delay);
605 static void cpcap_usb_detect(struct work_struct *work)
607 struct cpcap_charger_ddata *ddata;
608 struct cpcap_charger_ints_state s;
611 ddata = container_of(work, struct cpcap_charger_ddata,
614 error = cpcap_charger_get_ints_state(ddata, &s);
618 /* Just init the state if a charger is connected with no chrg_det set */
619 if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) {
620 cpcap_charger_update_state(ddata, CPCAP_CHARGER_DETECTING);
626 * If battery voltage is higher than charge voltage, it may have been
627 * charged to 4.35V by Android. Try again in 10 minutes.
629 if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) {
630 cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING,
636 /* Delay for 80ms to avoid vbus bouncing when usb cable is plugged in */
637 usleep_range(80000, 120000);
639 /* Throttle chrgcurr2 interrupt for charger done and retry */
640 switch (ddata->state) {
641 case CPCAP_CHARGER_CHARGING:
644 if (s.chrgcurr1 && s.vbusvld) {
645 cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DONE,
650 case CPCAP_CHARGER_DONE:
653 cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING,
660 if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) &&
665 if (cpcap_charger_battery_found(ddata))
666 max_current = CPCAP_REG_CRM_ICHRG_1A596;
668 max_current = CPCAP_REG_CRM_ICHRG_0A532;
670 vchrg = cpcap_charger_voltage_to_regval(ddata->voltage);
671 error = cpcap_charger_set_state(ddata,
672 CPCAP_REG_CRM_VCHRG(vchrg),
676 cpcap_charger_update_state(ddata, CPCAP_CHARGER_CHARGING);
678 error = cpcap_charger_set_state(ddata, 0, 0, 0);
681 cpcap_charger_update_state(ddata, CPCAP_CHARGER_DISCONNECTED);
684 power_supply_changed(ddata->usb);
688 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
691 static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
693 struct cpcap_charger_ddata *ddata = data;
695 if (!atomic_read(&ddata->active))
698 schedule_delayed_work(&ddata->detect_work, 0);
703 static int cpcap_usb_init_irq(struct platform_device *pdev,
704 struct cpcap_charger_ddata *ddata,
707 struct cpcap_interrupt_desc *d;
710 irq = platform_get_irq_byname(pdev, name);
714 error = devm_request_threaded_irq(ddata->dev, irq, NULL,
715 cpcap_charger_irq_thread,
716 IRQF_SHARED | IRQF_ONESHOT,
719 dev_err(ddata->dev, "could not get irq %s: %i\n",
725 d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
731 list_add(&d->node, &ddata->irq_list);
736 static const char * const cpcap_charger_irqs[] = {
738 "chrg_det", "rvrs_chrg",
741 "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
747 static int cpcap_usb_init_interrupts(struct platform_device *pdev,
748 struct cpcap_charger_ddata *ddata)
752 for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
753 error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
761 static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
765 for (i = 0; i < 2; i++) {
766 ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
768 if (IS_ERR(ddata->gpio[i])) {
769 dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
770 i, PTR_ERR(ddata->gpio[i]));
771 ddata->gpio[i] = NULL;
776 static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
778 const char * const names[CPCAP_CHARGER_IIO_NR] = {
779 "battdetb", "battp", "vbus", "chg_isense", "batti",
783 for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
784 ddata->channels[i] = devm_iio_channel_get(ddata->dev,
786 if (IS_ERR(ddata->channels[i])) {
787 error = PTR_ERR(ddata->channels[i]);
791 if (!ddata->channels[i]->indio_dev) {
800 if (error != -EPROBE_DEFER)
801 dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
807 static const struct power_supply_desc cpcap_charger_usb_desc = {
809 .type = POWER_SUPPLY_TYPE_USB,
810 .properties = cpcap_charger_props,
811 .num_properties = ARRAY_SIZE(cpcap_charger_props),
812 .get_property = cpcap_charger_get_property,
813 .set_property = cpcap_charger_set_property,
814 .property_is_writeable = cpcap_charger_property_is_writeable,
818 static const struct of_device_id cpcap_charger_id_table[] = {
820 .compatible = "motorola,mapphone-cpcap-charger",
824 MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
827 static int cpcap_charger_probe(struct platform_device *pdev)
829 struct cpcap_charger_ddata *ddata;
830 const struct of_device_id *of_id;
831 struct power_supply_config psy_cfg = {};
834 of_id = of_match_device(of_match_ptr(cpcap_charger_id_table),
839 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
843 ddata->dev = &pdev->dev;
844 ddata->voltage = 4200000;
846 ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
850 INIT_LIST_HEAD(&ddata->irq_list);
851 INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
852 INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
853 platform_set_drvdata(pdev, ddata);
855 error = cpcap_charger_init_iio(ddata);
859 atomic_set(&ddata->active, 1);
861 psy_cfg.of_node = pdev->dev.of_node;
862 psy_cfg.drv_data = ddata;
864 ddata->usb = devm_power_supply_register(ddata->dev,
865 &cpcap_charger_usb_desc,
867 if (IS_ERR(ddata->usb)) {
868 error = PTR_ERR(ddata->usb);
869 dev_err(ddata->dev, "failed to register USB charger: %i\n",
875 error = cpcap_usb_init_interrupts(pdev, ddata);
879 ddata->comparator.set_vbus = cpcap_charger_set_vbus;
880 error = omap_usb2_set_comparator(&ddata->comparator);
881 if (error == -ENODEV) {
882 dev_info(ddata->dev, "charger needs phy, deferring probe\n");
883 return -EPROBE_DEFER;
886 cpcap_charger_init_optional_gpios(ddata);
888 schedule_delayed_work(&ddata->detect_work, 0);
893 static int cpcap_charger_remove(struct platform_device *pdev)
895 struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
898 atomic_set(&ddata->active, 0);
899 error = omap_usb2_set_comparator(NULL);
901 dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
904 error = cpcap_charger_set_state(ddata, 0, 0, 0);
906 dev_warn(ddata->dev, "could not clear charger: %i\n",
908 cancel_delayed_work_sync(&ddata->vbus_work);
909 cancel_delayed_work_sync(&ddata->detect_work);
914 static struct platform_driver cpcap_charger_driver = {
915 .probe = cpcap_charger_probe,
917 .name = "cpcap-charger",
918 .of_match_table = of_match_ptr(cpcap_charger_id_table),
920 .remove = cpcap_charger_remove,
922 module_platform_driver(cpcap_charger_driver);
924 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
925 MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
926 MODULE_LICENSE("GPL v2");
927 MODULE_ALIAS("platform:cpcap-charger");