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 * 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>
20 #include <linux/mod_devicetable.h>
21 #include <linux/platform_device.h>
22 #include <linux/power_supply.h>
23 #include <linux/regmap.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/usb/phy_companion.h>
27 #include <linux/phy/omap_usb.h>
28 #include <linux/usb/otg.h>
29 #include <linux/iio/consumer.h>
30 #include <linux/mfd/motorola-cpcap.h>
33 * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware,
34 * see NXP "MC13783 Power Management and Audio Circuit Users's Guide"
35 * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers
36 * and values for CPCAP are different, but some of the internal components seem
37 * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1
38 * bits that seem to describe the CRM register.
40 #define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */
41 #define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */
42 #define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */
43 #define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */
44 #define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */
45 #define CPCAP_REG_CRM_ICHRG_TR0 BIT(10)
46 #define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */
47 #define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */
48 #define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */
49 #define CPCAP_REG_CRM_VCHRG2 BIT(6)
50 #define CPCAP_REG_CRM_VCHRG1 BIT(5)
51 #define CPCAP_REG_CRM_VCHRG0 BIT(4)
52 #define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */
53 #define CPCAP_REG_CRM_ICHRG2 BIT(2)
54 #define CPCAP_REG_CRM_ICHRG1 BIT(1)
55 #define CPCAP_REG_CRM_ICHRG0 BIT(0)
57 /* CPCAP_REG_CRM trickle charge voltages */
58 #define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10)
59 #define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0)
60 #define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1)
61 #define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2)
62 #define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4)
65 * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values.
66 * Note that these register bits don't match MC13783UG.pdf VCHRG
69 #define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4)
70 #define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0)
71 #define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1)
72 #define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2)
73 #define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3)
74 #define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4)
75 #define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5)
76 #define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6)
77 #define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7)
78 #define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8)
79 #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9)
80 #define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa)
81 #define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb)
82 #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc)
83 #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd)
84 #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe)
85 #define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf)
88 * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf
89 * values in "Table 8-3. Charge Path Regulator Current Limit
90 * Characteristics" for the nominal values.
92 * Except 70mA and 1.596A and unlimited, these are simply 88.7mA / step.
94 #define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0)
95 #define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0)
96 #define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1)
97 #define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2)
98 #define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3)
99 #define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4)
100 #define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5)
101 #define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6)
102 #define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7)
103 #define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8)
104 #define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9)
105 #define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa)
106 #define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb)
107 #define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc)
108 #define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd)
109 #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
110 #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
112 /* CPCAP_REG_VUSBC register bits needed for VBUS */
113 #define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */
116 CPCAP_CHARGER_IIO_BATTDET,
117 CPCAP_CHARGER_IIO_VOLTAGE,
118 CPCAP_CHARGER_IIO_VBUS,
119 CPCAP_CHARGER_IIO_CHRG_CURRENT,
120 CPCAP_CHARGER_IIO_BATT_CURRENT,
121 CPCAP_CHARGER_IIO_NR,
124 struct cpcap_charger_ddata {
127 struct list_head irq_list;
128 struct delayed_work detect_work;
129 struct delayed_work vbus_work;
130 struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */
132 struct iio_channel *channels[CPCAP_CHARGER_IIO_NR];
134 struct power_supply *usb;
136 struct phy_companion comparator; /* For USB VBUS */
137 unsigned int vbus_enabled:1;
138 unsigned int feeding_vbus:1;
146 struct cpcap_interrupt_desc {
148 struct list_head node;
152 struct cpcap_charger_ints_state {
166 static enum power_supply_property cpcap_charger_props[] = {
167 POWER_SUPPLY_PROP_STATUS,
168 POWER_SUPPLY_PROP_ONLINE,
169 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
170 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
171 POWER_SUPPLY_PROP_VOLTAGE_NOW,
172 POWER_SUPPLY_PROP_CURRENT_NOW,
175 static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
177 struct iio_channel *channel;
178 int error, value = 0;
180 channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE];
181 error = iio_read_channel_processed(channel, &value);
183 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
191 static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata)
193 struct iio_channel *channel;
194 int error, value = 0;
196 channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT];
197 error = iio_read_channel_processed(channel, &value);
199 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
207 static int cpcap_charger_get_property(struct power_supply *psy,
208 enum power_supply_property psp,
209 union power_supply_propval *val)
211 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
214 case POWER_SUPPLY_PROP_STATUS:
215 val->intval = ddata->status;
217 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
218 val->intval = ddata->limit_current;
220 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
221 val->intval = ddata->voltage;
223 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
224 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
225 val->intval = cpcap_charger_get_charge_voltage(ddata) *
230 case POWER_SUPPLY_PROP_CURRENT_NOW:
231 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
232 val->intval = cpcap_charger_get_charge_current(ddata) *
237 case POWER_SUPPLY_PROP_ONLINE:
238 val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING;
247 static int cpcap_charger_match_voltage(int voltage)
250 case 0 ... 4100000 - 1: return 3800000;
251 case 4100000 ... 4120000 - 1: return 4100000;
252 case 4120000 ... 4150000 - 1: return 4120000;
253 case 4150000 ... 4170000 - 1: return 4150000;
254 case 4170000 ... 4200000 - 1: return 4170000;
255 case 4200000 ... 4230000 - 1: return 4200000;
256 case 4230000 ... 4250000 - 1: return 4230000;
257 case 4250000 ... 4270000 - 1: return 4250000;
258 case 4270000 ... 4300000 - 1: return 4270000;
259 case 4300000 ... 4330000 - 1: return 4300000;
260 case 4330000 ... 4350000 - 1: return 4330000;
261 case 4350000 ... 4380000 - 1: return 4350000;
262 case 4380000 ... 4400000 - 1: return 4380000;
263 case 4400000 ... 4420000 - 1: return 4400000;
264 case 4420000 ... 4440000 - 1: return 4420000;
265 case 4440000: return 4440000;
271 cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata)
273 union power_supply_propval prop;
274 struct power_supply *battery;
275 int voltage = ddata->voltage;
278 battery = power_supply_get_by_name("battery");
280 error = power_supply_get_property(battery,
281 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
284 voltage = prop.intval;
286 power_supply_put(battery);
292 static int cpcap_charger_current_to_regval(int microamp)
294 int miliamp = microamp / 1000;
300 return CPCAP_REG_CRM_ICHRG(0x0);
302 return CPCAP_REG_CRM_ICHRG(0x1);
304 return CPCAP_REG_CRM_ICHRG(0xe);
306 res = microamp / 88666;
309 return CPCAP_REG_CRM_ICHRG(res);
312 static int cpcap_charger_set_property(struct power_supply *psy,
313 enum power_supply_property psp,
314 const union power_supply_propval *val)
316 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
317 int voltage, batvolt;
320 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
321 if (cpcap_charger_current_to_regval(val->intval) < 0)
323 ddata->limit_current = val->intval;
324 schedule_delayed_work(&ddata->detect_work, 0);
326 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
327 voltage = cpcap_charger_match_voltage(val->intval);
328 batvolt = cpcap_charger_get_bat_const_charge_voltage(ddata);
329 if (voltage > batvolt)
331 ddata->voltage = voltage;
332 schedule_delayed_work(&ddata->detect_work, 0);
341 static int cpcap_charger_property_is_writeable(struct power_supply *psy,
342 enum power_supply_property psp)
345 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
346 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
353 static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
359 gpiod_set_value(ddata->gpio[0], enabled);
362 static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata,
368 gpiod_set_value(ddata->gpio[1], enabled);
371 static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata,
376 if (state > POWER_SUPPLY_STATUS_FULL) {
377 dev_warn(ddata->dev, "unknown state: %i\n", state);
382 ddata->status = state;
385 case POWER_SUPPLY_STATUS_DISCHARGING:
386 status = "DISCONNECTED";
388 case POWER_SUPPLY_STATUS_NOT_CHARGING:
389 status = "DETECTING";
391 case POWER_SUPPLY_STATUS_CHARGING:
394 case POWER_SUPPLY_STATUS_FULL:
401 dev_dbg(ddata->dev, "state: %s\n", status);
404 static int cpcap_charger_disable(struct cpcap_charger_ddata *ddata)
408 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
409 CPCAP_REG_CRM_FET_OVRD |
410 CPCAP_REG_CRM_FET_CTRL);
412 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
417 static int cpcap_charger_enable(struct cpcap_charger_ddata *ddata,
418 int max_voltage, int charge_current,
423 if (!max_voltage || !charge_current)
426 dev_dbg(ddata->dev, "enable: %i %i %i\n",
427 max_voltage, charge_current, trickle_current);
429 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff,
430 CPCAP_REG_CRM_CHRG_LED_EN |
432 CPCAP_REG_CRM_FET_OVRD |
433 CPCAP_REG_CRM_FET_CTRL |
437 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
442 static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata)
444 int error, value = 0;
445 struct iio_channel *channel =
446 ddata->channels[CPCAP_CHARGER_IIO_VBUS];
448 error = iio_read_channel_processed(channel, &value);
452 dev_err(ddata->dev, "error reading VBUS: %i\n", error);
457 /* VBUS control functions for the USB PHY companion */
458 static void cpcap_charger_vbus_work(struct work_struct *work)
460 struct cpcap_charger_ddata *ddata;
464 ddata = container_of(work, struct cpcap_charger_ddata,
467 if (ddata->vbus_enabled) {
468 vbus = cpcap_charger_vbus_valid(ddata);
470 dev_dbg(ddata->dev, "VBUS already provided\n");
475 ddata->feeding_vbus = true;
476 cpcap_charger_set_cable_path(ddata, false);
477 cpcap_charger_set_inductive_path(ddata, false);
479 error = cpcap_charger_disable(ddata);
483 cpcap_charger_update_state(ddata,
484 POWER_SUPPLY_STATUS_DISCHARGING);
486 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
487 CPCAP_BIT_VBUS_SWITCH,
488 CPCAP_BIT_VBUS_SWITCH);
492 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
493 CPCAP_REG_CRM_RVRSMODE,
494 CPCAP_REG_CRM_RVRSMODE);
498 error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
499 CPCAP_BIT_VBUS_SWITCH, 0);
503 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
504 CPCAP_REG_CRM_RVRSMODE, 0);
508 cpcap_charger_set_cable_path(ddata, true);
509 cpcap_charger_set_inductive_path(ddata, true);
510 ddata->feeding_vbus = false;
516 cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
517 dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__,
518 ddata->vbus_enabled ? "enable" : "disable", error);
521 static int cpcap_charger_set_vbus(struct phy_companion *comparator,
524 struct cpcap_charger_ddata *ddata =
525 container_of(comparator, struct cpcap_charger_ddata,
528 ddata->vbus_enabled = enabled;
529 schedule_delayed_work(&ddata->vbus_work, 0);
534 /* Charger interrupt handling functions */
536 static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata,
537 struct cpcap_charger_ints_state *s)
541 error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
545 s->chrg_det = val & BIT(13);
546 s->rvrs_chrg = val & BIT(12);
547 s->vbusov = val & BIT(11);
549 error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
553 s->chrg_se1b = val & BIT(13);
554 s->rvrs_mode = val & BIT(6);
555 s->chrgcurr2 = val & BIT(5);
556 s->chrgcurr1 = val & BIT(4);
557 s->vbusvld = val & BIT(3);
559 error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
563 s->battdetb = val & BIT(6);
568 static int cpcap_charger_voltage_to_regval(int voltage)
573 case 0 ... 4100000 - 1:
575 case 4100000 ... 4200000 - 1:
578 case 4200000 ... 4300000 - 1:
581 case 4300000 ... 4380000 - 1:
584 case 4380000 ... 4440000:
591 return ((voltage - 4100000) / 20000) + offset;
594 static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata,
595 int state, unsigned long delay)
599 /* Update battery state before disconnecting the charger */
601 case POWER_SUPPLY_STATUS_DISCHARGING:
602 case POWER_SUPPLY_STATUS_FULL:
603 power_supply_changed(ddata->usb);
609 error = cpcap_charger_disable(ddata);
611 cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
615 cpcap_charger_update_state(ddata, state);
616 power_supply_changed(ddata->usb);
617 schedule_delayed_work(&ddata->detect_work, delay);
620 static void cpcap_usb_detect(struct work_struct *work)
622 struct cpcap_charger_ddata *ddata;
623 struct cpcap_charger_ints_state s;
624 int error, new_state;
626 ddata = container_of(work, struct cpcap_charger_ddata,
629 error = cpcap_charger_get_ints_state(ddata, &s);
633 /* Just init the state if a charger is connected with no chrg_det set */
634 if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) {
635 cpcap_charger_update_state(ddata,
636 POWER_SUPPLY_STATUS_NOT_CHARGING);
642 * If battery voltage is higher than charge voltage, it may have been
643 * charged to 4.35V by Android. Try again in 10 minutes.
645 if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) {
646 cpcap_charger_disconnect(ddata,
647 POWER_SUPPLY_STATUS_NOT_CHARGING,
653 /* Delay for 80ms to avoid vbus bouncing when usb cable is plugged in */
654 usleep_range(80000, 120000);
656 /* Throttle chrgcurr2 interrupt for charger done and retry */
657 switch (ddata->status) {
658 case POWER_SUPPLY_STATUS_CHARGING:
661 new_state = POWER_SUPPLY_STATUS_FULL;
663 if (s.chrgcurr1 && s.vbusvld) {
664 cpcap_charger_disconnect(ddata, new_state, HZ * 5);
668 case POWER_SUPPLY_STATUS_FULL:
672 new_state = POWER_SUPPLY_STATUS_NOT_CHARGING;
674 new_state = POWER_SUPPLY_STATUS_DISCHARGING;
676 cpcap_charger_disconnect(ddata, new_state, HZ * 5);
683 if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) &&
687 union power_supply_propval val;
688 struct power_supply *battery;
690 battery = power_supply_get_by_name("battery");
691 if (IS_ERR_OR_NULL(battery)) {
692 dev_err(ddata->dev, "battery power_supply not available %li\n",
697 error = power_supply_get_property(battery, POWER_SUPPLY_PROP_PRESENT, &val);
698 power_supply_put(battery);
703 max_current = 1596000;
705 dev_info(ddata->dev, "battery not inserted, charging disabled\n");
709 if (max_current > ddata->limit_current)
710 max_current = ddata->limit_current;
712 ichrg = cpcap_charger_current_to_regval(max_current);
713 vchrg = cpcap_charger_voltage_to_regval(ddata->voltage);
714 error = cpcap_charger_enable(ddata,
715 CPCAP_REG_CRM_VCHRG(vchrg),
719 cpcap_charger_update_state(ddata,
720 POWER_SUPPLY_STATUS_CHARGING);
722 error = cpcap_charger_disable(ddata);
725 cpcap_charger_update_state(ddata,
726 POWER_SUPPLY_STATUS_DISCHARGING);
729 power_supply_changed(ddata->usb);
733 cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
734 dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
737 static irqreturn_t cpcap_charger_irq_thread(int irq, void *data)
739 struct cpcap_charger_ddata *ddata = data;
741 if (!atomic_read(&ddata->active))
744 schedule_delayed_work(&ddata->detect_work, 0);
749 static int cpcap_usb_init_irq(struct platform_device *pdev,
750 struct cpcap_charger_ddata *ddata,
753 struct cpcap_interrupt_desc *d;
756 irq = platform_get_irq_byname(pdev, name);
760 error = devm_request_threaded_irq(ddata->dev, irq, NULL,
761 cpcap_charger_irq_thread,
762 IRQF_SHARED | IRQF_ONESHOT,
765 dev_err(ddata->dev, "could not get irq %s: %i\n",
771 d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL);
777 list_add(&d->node, &ddata->irq_list);
782 static const char * const cpcap_charger_irqs[] = {
784 "chrg_det", "rvrs_chrg",
787 "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
793 static int cpcap_usb_init_interrupts(struct platform_device *pdev,
794 struct cpcap_charger_ddata *ddata)
798 for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) {
799 error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]);
807 static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata)
811 for (i = 0; i < 2; i++) {
812 ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
814 if (IS_ERR(ddata->gpio[i])) {
815 dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
816 i, PTR_ERR(ddata->gpio[i]));
817 ddata->gpio[i] = NULL;
822 static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata)
824 const char * const names[CPCAP_CHARGER_IIO_NR] = {
825 "battdetb", "battp", "vbus", "chg_isense", "batti",
829 for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) {
830 ddata->channels[i] = devm_iio_channel_get(ddata->dev,
832 if (IS_ERR(ddata->channels[i])) {
833 error = PTR_ERR(ddata->channels[i]);
837 if (!ddata->channels[i]->indio_dev) {
846 if (error != -EPROBE_DEFER)
847 dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
853 static char *cpcap_charger_supplied_to[] = {
857 static const struct power_supply_desc cpcap_charger_usb_desc = {
859 .type = POWER_SUPPLY_TYPE_USB,
860 .properties = cpcap_charger_props,
861 .num_properties = ARRAY_SIZE(cpcap_charger_props),
862 .get_property = cpcap_charger_get_property,
863 .set_property = cpcap_charger_set_property,
864 .property_is_writeable = cpcap_charger_property_is_writeable,
867 static const struct of_device_id cpcap_charger_id_table[] = {
869 .compatible = "motorola,mapphone-cpcap-charger",
873 MODULE_DEVICE_TABLE(of, cpcap_charger_id_table);
875 static int cpcap_charger_probe(struct platform_device *pdev)
877 struct cpcap_charger_ddata *ddata;
878 struct power_supply_config psy_cfg = {};
881 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
885 ddata->dev = &pdev->dev;
886 ddata->voltage = 4200000;
887 ddata->limit_current = 532000;
889 ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
893 INIT_LIST_HEAD(&ddata->irq_list);
894 INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
895 INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work);
896 platform_set_drvdata(pdev, ddata);
898 error = cpcap_charger_init_iio(ddata);
902 atomic_set(&ddata->active, 1);
904 psy_cfg.of_node = pdev->dev.of_node;
905 psy_cfg.drv_data = ddata;
906 psy_cfg.supplied_to = cpcap_charger_supplied_to;
907 psy_cfg.num_supplicants = ARRAY_SIZE(cpcap_charger_supplied_to),
909 ddata->usb = devm_power_supply_register(ddata->dev,
910 &cpcap_charger_usb_desc,
912 if (IS_ERR(ddata->usb)) {
913 error = PTR_ERR(ddata->usb);
914 dev_err(ddata->dev, "failed to register USB charger: %i\n",
920 error = cpcap_usb_init_interrupts(pdev, ddata);
924 ddata->comparator.set_vbus = cpcap_charger_set_vbus;
925 error = omap_usb2_set_comparator(&ddata->comparator);
926 if (error == -ENODEV) {
927 dev_info(ddata->dev, "charger needs phy, deferring probe\n");
928 return -EPROBE_DEFER;
931 cpcap_charger_init_optional_gpios(ddata);
933 schedule_delayed_work(&ddata->detect_work, 0);
938 static void cpcap_charger_shutdown(struct platform_device *pdev)
940 struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev);
943 atomic_set(&ddata->active, 0);
944 error = omap_usb2_set_comparator(NULL);
946 dev_warn(ddata->dev, "could not clear USB comparator: %i\n",
949 error = cpcap_charger_disable(ddata);
951 cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN);
952 dev_warn(ddata->dev, "could not clear charger: %i\n",
955 cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_DISCHARGING);
956 cancel_delayed_work_sync(&ddata->vbus_work);
957 cancel_delayed_work_sync(&ddata->detect_work);
960 static void cpcap_charger_remove(struct platform_device *pdev)
962 cpcap_charger_shutdown(pdev);
965 static struct platform_driver cpcap_charger_driver = {
966 .probe = cpcap_charger_probe,
968 .name = "cpcap-charger",
969 .of_match_table = cpcap_charger_id_table,
971 .shutdown = cpcap_charger_shutdown,
972 .remove_new = cpcap_charger_remove,
974 module_platform_driver(cpcap_charger_driver);
976 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
977 MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver");
978 MODULE_LICENSE("GPL v2");
979 MODULE_ALIAS("platform:cpcap-charger");