1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * DA9150 Charger Driver
5 * Copyright (c) 2014 Dialog Semiconductor
7 * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
10 #include <linux/kernel.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/interrupt.h>
15 #include <linux/power_supply.h>
16 #include <linux/notifier.h>
17 #include <linux/usb/phy.h>
18 #include <linux/iio/consumer.h>
19 #include <linux/mfd/da9150/core.h>
20 #include <linux/mfd/da9150/registers.h>
23 struct da9150_charger {
24 struct da9150 *da9150;
27 struct power_supply *usb;
28 struct power_supply *battery;
29 struct power_supply *supply_online;
31 struct usb_phy *usb_phy;
32 struct notifier_block otg_nb;
33 struct work_struct otg_work;
34 unsigned long usb_event;
36 struct iio_channel *ibus_chan;
37 struct iio_channel *vbus_chan;
38 struct iio_channel *tjunc_chan;
39 struct iio_channel *vbat_chan;
42 static inline int da9150_charger_supply_online(struct da9150_charger *charger,
43 struct power_supply *psy,
44 union power_supply_propval *val)
46 val->intval = (psy == charger->supply_online) ? 1 : 0;
51 /* Charger Properties */
52 static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger,
53 union power_supply_propval *val)
57 /* Read processed value - mV units */
58 ret = iio_read_channel_processed(charger->vbus_chan, &v_val);
62 /* Convert voltage to expected uV units */
63 val->intval = v_val * 1000;
68 static int da9150_charger_ibus_current_avg(struct da9150_charger *charger,
69 union power_supply_propval *val)
73 /* Read processed value - mA units */
74 ret = iio_read_channel_processed(charger->ibus_chan, &i_val);
78 /* Convert current to expected uA units */
79 val->intval = i_val * 1000;
84 static int da9150_charger_tjunc_temp(struct da9150_charger *charger,
85 union power_supply_propval *val)
89 /* Read processed value - 0.001 degrees C units */
90 ret = iio_read_channel_processed(charger->tjunc_chan, &t_val);
94 /* Convert temp to expect 0.1 degrees C units */
95 val->intval = t_val / 100;
100 static enum power_supply_property da9150_charger_props[] = {
101 POWER_SUPPLY_PROP_ONLINE,
102 POWER_SUPPLY_PROP_VOLTAGE_NOW,
103 POWER_SUPPLY_PROP_CURRENT_AVG,
104 POWER_SUPPLY_PROP_TEMP,
107 static int da9150_charger_get_prop(struct power_supply *psy,
108 enum power_supply_property psp,
109 union power_supply_propval *val)
111 struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
115 case POWER_SUPPLY_PROP_ONLINE:
116 ret = da9150_charger_supply_online(charger, psy, val);
118 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
119 ret = da9150_charger_vbus_voltage_now(charger, val);
121 case POWER_SUPPLY_PROP_CURRENT_AVG:
122 ret = da9150_charger_ibus_current_avg(charger, val);
124 case POWER_SUPPLY_PROP_TEMP:
125 ret = da9150_charger_tjunc_temp(charger, val);
135 /* Battery Properties */
136 static int da9150_charger_battery_status(struct da9150_charger *charger,
137 union power_supply_propval *val)
141 /* Check to see if battery is discharging */
142 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
144 if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) ||
145 ((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) {
146 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
151 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
153 /* Now check for other states */
154 switch (reg & DA9150_CHG_STAT_MASK) {
155 case DA9150_CHG_STAT_ACT:
156 case DA9150_CHG_STAT_PRE:
157 case DA9150_CHG_STAT_CC:
158 case DA9150_CHG_STAT_CV:
159 val->intval = POWER_SUPPLY_STATUS_CHARGING;
161 case DA9150_CHG_STAT_OFF:
162 case DA9150_CHG_STAT_SUSP:
163 case DA9150_CHG_STAT_TEMP:
164 case DA9150_CHG_STAT_TIME:
165 case DA9150_CHG_STAT_BAT:
166 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
168 case DA9150_CHG_STAT_FULL:
169 val->intval = POWER_SUPPLY_STATUS_FULL;
172 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
179 static int da9150_charger_battery_health(struct da9150_charger *charger,
180 union power_supply_propval *val)
184 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
186 /* Check if temperature limit reached */
187 switch (reg & DA9150_CHG_TEMP_MASK) {
188 case DA9150_CHG_TEMP_UNDER:
189 val->intval = POWER_SUPPLY_HEALTH_COLD;
191 case DA9150_CHG_TEMP_OVER:
192 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
198 /* Check for other health states */
199 switch (reg & DA9150_CHG_STAT_MASK) {
200 case DA9150_CHG_STAT_ACT:
201 case DA9150_CHG_STAT_PRE:
202 val->intval = POWER_SUPPLY_HEALTH_DEAD;
204 case DA9150_CHG_STAT_TIME:
205 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
208 val->intval = POWER_SUPPLY_HEALTH_GOOD;
215 static int da9150_charger_battery_present(struct da9150_charger *charger,
216 union power_supply_propval *val)
220 /* Check if battery present or removed */
221 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
222 if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT)
230 static int da9150_charger_battery_charge_type(struct da9150_charger *charger,
231 union power_supply_propval *val)
235 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J);
237 switch (reg & DA9150_CHG_STAT_MASK) {
238 case DA9150_CHG_STAT_CC:
239 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
241 case DA9150_CHG_STAT_ACT:
242 case DA9150_CHG_STAT_PRE:
243 case DA9150_CHG_STAT_CV:
244 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
247 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
254 static int da9150_charger_battery_voltage_min(struct da9150_charger *charger,
255 union power_supply_propval *val)
259 reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C);
261 /* Value starts at 2500 mV, 50 mV increments, presented in uV */
262 val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000;
267 static int da9150_charger_battery_voltage_now(struct da9150_charger *charger,
268 union power_supply_propval *val)
272 /* Read processed value - mV units */
273 ret = iio_read_channel_processed(charger->vbat_chan, &v_val);
277 val->intval = v_val * 1000;
282 static int da9150_charger_battery_current_max(struct da9150_charger *charger,
283 union power_supply_propval *val)
287 reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D);
289 /* 25mA increments */
290 val->intval = reg * 25000;
295 static int da9150_charger_battery_voltage_max(struct da9150_charger *charger,
296 union power_supply_propval *val)
300 reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B);
302 /* Value starts at 3650 mV, 25 mV increments, presented in uV */
303 val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000;
307 static enum power_supply_property da9150_charger_bat_props[] = {
308 POWER_SUPPLY_PROP_STATUS,
309 POWER_SUPPLY_PROP_ONLINE,
310 POWER_SUPPLY_PROP_HEALTH,
311 POWER_SUPPLY_PROP_PRESENT,
312 POWER_SUPPLY_PROP_CHARGE_TYPE,
313 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
314 POWER_SUPPLY_PROP_VOLTAGE_NOW,
315 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
316 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
319 static int da9150_charger_battery_get_prop(struct power_supply *psy,
320 enum power_supply_property psp,
321 union power_supply_propval *val)
323 struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent);
327 case POWER_SUPPLY_PROP_STATUS:
328 ret = da9150_charger_battery_status(charger, val);
330 case POWER_SUPPLY_PROP_ONLINE:
331 ret = da9150_charger_supply_online(charger, psy, val);
333 case POWER_SUPPLY_PROP_HEALTH:
334 ret = da9150_charger_battery_health(charger, val);
336 case POWER_SUPPLY_PROP_PRESENT:
337 ret = da9150_charger_battery_present(charger, val);
339 case POWER_SUPPLY_PROP_CHARGE_TYPE:
340 ret = da9150_charger_battery_charge_type(charger, val);
342 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
343 ret = da9150_charger_battery_voltage_min(charger, val);
345 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
346 ret = da9150_charger_battery_voltage_now(charger, val);
348 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
349 ret = da9150_charger_battery_current_max(charger, val);
351 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
352 ret = da9150_charger_battery_voltage_max(charger, val);
362 static irqreturn_t da9150_charger_chg_irq(int irq, void *data)
364 struct da9150_charger *charger = data;
366 power_supply_changed(charger->battery);
371 static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data)
373 struct da9150_charger *charger = data;
375 /* Nothing we can really do except report this. */
376 dev_crit(charger->dev, "TJunc over temperature!!!\n");
377 power_supply_changed(charger->usb);
382 static irqreturn_t da9150_charger_vfault_irq(int irq, void *data)
384 struct da9150_charger *charger = data;
386 /* Nothing we can really do except report this. */
387 dev_crit(charger->dev, "VSYS under voltage!!!\n");
388 power_supply_changed(charger->usb);
389 power_supply_changed(charger->battery);
394 static irqreturn_t da9150_charger_vbus_irq(int irq, void *data)
396 struct da9150_charger *charger = data;
399 reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H);
401 /* Charger plugged in or battery only */
402 switch (reg & DA9150_VBUS_STAT_MASK) {
403 case DA9150_VBUS_STAT_OFF:
404 case DA9150_VBUS_STAT_WAIT:
405 charger->supply_online = charger->battery;
407 case DA9150_VBUS_STAT_CHG:
408 charger->supply_online = charger->usb;
411 dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n",
413 charger->supply_online = NULL;
417 power_supply_changed(charger->usb);
418 power_supply_changed(charger->battery);
423 static void da9150_charger_otg_work(struct work_struct *data)
425 struct da9150_charger *charger =
426 container_of(data, struct da9150_charger, otg_work);
428 switch (charger->usb_event) {
430 /* Enable OTG Boost */
431 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
432 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG);
435 /* Revert to charge mode */
436 power_supply_changed(charger->usb);
437 power_supply_changed(charger->battery);
438 da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A,
439 DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG);
444 static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val,
447 struct da9150_charger *charger =
448 container_of(nb, struct da9150_charger, otg_nb);
450 dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val);
452 charger->usb_event = val;
453 schedule_work(&charger->otg_work);
458 static int da9150_charger_register_irq(struct platform_device *pdev,
459 irq_handler_t handler,
460 const char *irq_name)
462 struct device *dev = &pdev->dev;
463 struct da9150_charger *charger = platform_get_drvdata(pdev);
466 irq = platform_get_irq_byname(pdev, irq_name);
470 ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name,
473 dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret);
478 static void da9150_charger_unregister_irq(struct platform_device *pdev,
479 const char *irq_name)
481 struct da9150_charger *charger = platform_get_drvdata(pdev);
484 irq = platform_get_irq_byname(pdev, irq_name);
488 free_irq(irq, charger);
491 static const struct power_supply_desc usb_desc = {
492 .name = "da9150-usb",
493 .type = POWER_SUPPLY_TYPE_USB,
494 .properties = da9150_charger_props,
495 .num_properties = ARRAY_SIZE(da9150_charger_props),
496 .get_property = da9150_charger_get_prop,
499 static const struct power_supply_desc battery_desc = {
500 .name = "da9150-battery",
501 .type = POWER_SUPPLY_TYPE_BATTERY,
502 .properties = da9150_charger_bat_props,
503 .num_properties = ARRAY_SIZE(da9150_charger_bat_props),
504 .get_property = da9150_charger_battery_get_prop,
507 static int da9150_charger_probe(struct platform_device *pdev)
509 struct device *dev = &pdev->dev;
510 struct da9150 *da9150 = dev_get_drvdata(dev->parent);
511 struct da9150_charger *charger;
515 charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL);
519 platform_set_drvdata(pdev, charger);
520 charger->da9150 = da9150;
523 /* Acquire ADC channels */
524 charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS");
525 if (IS_ERR(charger->ibus_chan)) {
526 ret = PTR_ERR(charger->ibus_chan);
530 charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS");
531 if (IS_ERR(charger->vbus_chan)) {
532 ret = PTR_ERR(charger->vbus_chan);
536 charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC");
537 if (IS_ERR(charger->tjunc_chan)) {
538 ret = PTR_ERR(charger->tjunc_chan);
539 goto tjunc_chan_fail;
542 charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT");
543 if (IS_ERR(charger->vbat_chan)) {
544 ret = PTR_ERR(charger->vbat_chan);
548 /* Register power supplies */
549 charger->usb = power_supply_register(dev, &usb_desc, NULL);
550 if (IS_ERR(charger->usb)) {
551 ret = PTR_ERR(charger->usb);
555 charger->battery = power_supply_register(dev, &battery_desc, NULL);
556 if (IS_ERR(charger->battery)) {
557 ret = PTR_ERR(charger->battery);
561 /* Get initial online supply */
562 reg = da9150_reg_read(da9150, DA9150_STATUS_H);
564 switch (reg & DA9150_VBUS_STAT_MASK) {
565 case DA9150_VBUS_STAT_OFF:
566 case DA9150_VBUS_STAT_WAIT:
567 charger->supply_online = charger->battery;
569 case DA9150_VBUS_STAT_CHG:
570 charger->supply_online = charger->usb;
573 dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg);
574 charger->supply_online = NULL;
578 /* Setup OTG reporting & configuration */
579 charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
580 if (!IS_ERR_OR_NULL(charger->usb_phy)) {
581 INIT_WORK(&charger->otg_work, da9150_charger_otg_work);
582 charger->otg_nb.notifier_call = da9150_charger_otg_ncb;
583 usb_register_notifier(charger->usb_phy, &charger->otg_nb);
587 ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq,
592 ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq,
597 ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq,
600 goto vfault_irq_fail;
602 ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq,
611 da9150_charger_unregister_irq(pdev, "CHG_VFAULT");
613 da9150_charger_unregister_irq(pdev, "CHG_TJUNC");
615 da9150_charger_unregister_irq(pdev, "CHG_STATUS");
617 if (!IS_ERR_OR_NULL(charger->usb_phy))
618 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
620 power_supply_unregister(charger->usb);
623 iio_channel_release(charger->vbat_chan);
626 iio_channel_release(charger->tjunc_chan);
629 iio_channel_release(charger->vbus_chan);
632 iio_channel_release(charger->ibus_chan);
638 static void da9150_charger_remove(struct platform_device *pdev)
640 struct da9150_charger *charger = platform_get_drvdata(pdev);
643 /* Make sure IRQs are released before unregistering power supplies */
644 irq = platform_get_irq_byname(pdev, "CHG_VBUS");
645 free_irq(irq, charger);
647 irq = platform_get_irq_byname(pdev, "CHG_VFAULT");
648 free_irq(irq, charger);
650 irq = platform_get_irq_byname(pdev, "CHG_TJUNC");
651 free_irq(irq, charger);
653 irq = platform_get_irq_byname(pdev, "CHG_STATUS");
654 free_irq(irq, charger);
656 if (!IS_ERR_OR_NULL(charger->usb_phy))
657 usb_unregister_notifier(charger->usb_phy, &charger->otg_nb);
658 cancel_work_sync(&charger->otg_work);
660 power_supply_unregister(charger->battery);
661 power_supply_unregister(charger->usb);
663 /* Release ADC channels */
664 iio_channel_release(charger->ibus_chan);
665 iio_channel_release(charger->vbus_chan);
666 iio_channel_release(charger->tjunc_chan);
667 iio_channel_release(charger->vbat_chan);
670 static struct platform_driver da9150_charger_driver = {
672 .name = "da9150-charger",
674 .probe = da9150_charger_probe,
675 .remove_new = da9150_charger_remove,
678 module_platform_driver(da9150_charger_driver);
680 MODULE_DESCRIPTION("Charger Driver for DA9150");
681 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
682 MODULE_LICENSE("GPL");