2 * axp288_charger.c - X-power AXP288 PMIC Charger driver
4 * Copyright (C) 2014 Intel Corporation
5 * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <linux/module.h>
18 #include <linux/device.h>
19 #include <linux/regmap.h>
20 #include <linux/workqueue.h>
21 #include <linux/delay.h>
22 #include <linux/platform_device.h>
23 #include <linux/usb/otg.h>
24 #include <linux/notifier.h>
25 #include <linux/power_supply.h>
26 #include <linux/property.h>
27 #include <linux/mfd/axp20x.h>
28 #include <linux/extcon.h>
30 #define PS_STAT_VBUS_TRIGGER (1 << 0)
31 #define PS_STAT_BAT_CHRG_DIR (1 << 2)
32 #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
33 #define PS_STAT_VBUS_VALID (1 << 4)
34 #define PS_STAT_VBUS_PRESENT (1 << 5)
36 #define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
37 #define CHRG_STAT_BAT_VALID (1 << 4)
38 #define CHRG_STAT_BAT_PRESENT (1 << 5)
39 #define CHRG_STAT_CHARGING (1 << 6)
40 #define CHRG_STAT_PMIC_OTP (1 << 7)
42 #define VBUS_ISPOUT_CUR_LIM_MASK 0x03
43 #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
44 #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */
45 #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */
46 #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */
47 #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */
48 #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31
49 #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
50 #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */
51 #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */
52 #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */
53 #define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7)
55 #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
56 #define CHRG_CCCV_CC_BIT_POS 0
57 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
58 #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
59 #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
60 #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
61 #define CHRG_CCCV_CV_BIT_POS 5
62 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
63 #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
64 #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
65 #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
66 #define CHRG_CCCV_CHG_EN (1 << 7)
68 #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */
69 #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */
70 #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */
71 #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */
72 #define CNTL2_CHGLED_TYPEB (1 << 4)
73 #define CNTL2_CHG_OUT_TURNON (1 << 5)
74 #define CNTL2_PC_TIMEOUT_MASK 0xC0
75 #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */
76 #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */
77 #define CNTL2_PC_TIMEOUT_70MINS 0x3
79 #define CHRG_ILIM_TEMP_LOOP_EN (1 << 3)
80 #define CHRG_VBUS_ILIM_MASK 0xf0
81 #define CHRG_VBUS_ILIM_BIT_POS 4
82 #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */
83 #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */
84 #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */
85 #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */
86 #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */
87 #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */
88 #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */
90 #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */
91 #define CHRG_VHTFC_45C 0x1F /* 45 DegC */
93 #define BAT_IRQ_CFG_CHRG_DONE (1 << 2)
94 #define BAT_IRQ_CFG_CHRG_START (1 << 3)
95 #define BAT_IRQ_CFG_BAT_SAFE_EXIT (1 << 4)
96 #define BAT_IRQ_CFG_BAT_SAFE_ENTER (1 << 5)
97 #define BAT_IRQ_CFG_BAT_DISCON (1 << 6)
98 #define BAT_IRQ_CFG_BAT_CONN (1 << 7)
99 #define BAT_IRQ_CFG_BAT_MASK 0xFC
101 #define TEMP_IRQ_CFG_QCBTU (1 << 4)
102 #define TEMP_IRQ_CFG_CBTU (1 << 5)
103 #define TEMP_IRQ_CFG_QCBTO (1 << 6)
104 #define TEMP_IRQ_CFG_CBTO (1 << 7)
105 #define TEMP_IRQ_CFG_MASK 0xF0
107 #define FG_CNTL_OCV_ADJ_EN (1 << 3)
109 #define CV_4100MV 4100 /* 4100mV */
110 #define CV_4150MV 4150 /* 4150mV */
111 #define CV_4200MV 4200 /* 4200mV */
112 #define CV_4350MV 4350 /* 4350mV */
114 #define CC_200MA 200 /* 200mA */
115 #define CC_600MA 600 /* 600mA */
116 #define CC_800MA 800 /* 800mA */
117 #define CC_1000MA 1000 /* 1000mA */
118 #define CC_1600MA 1600 /* 1600mA */
119 #define CC_2000MA 2000 /* 2000mA */
121 #define ILIM_100MA 100 /* 100mA */
122 #define ILIM_500MA 500 /* 500mA */
123 #define ILIM_900MA 900 /* 900mA */
124 #define ILIM_1500MA 1500 /* 1500mA */
125 #define ILIM_2000MA 2000 /* 2000mA */
126 #define ILIM_2500MA 2500 /* 2500mA */
127 #define ILIM_3000MA 3000 /* 3000mA */
129 #define AXP288_EXTCON_DEV_NAME "axp288_extcon"
144 struct axp288_chrg_info {
145 struct platform_device *pdev;
146 struct axp20x_chrg_pdata *pdata;
147 struct regmap *regmap;
148 struct regmap_irq_chip_data *regmap_irqc;
149 int irq[CHRG_INTR_END];
150 struct power_supply *psy_usb;
155 struct work_struct work;
156 struct extcon_dev *cable;
157 struct notifier_block id_nb;
161 /* SDP/CDP/DCP USB charging cable notifications */
163 struct extcon_dev *edev;
165 enum power_supply_type chg_type;
166 struct notifier_block nb;
167 struct work_struct work;
179 bool is_charger_enabled;
182 static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
187 if (cc < CHRG_CCCV_CC_OFFSET)
188 cc = CHRG_CCCV_CC_OFFSET;
189 else if (cc > info->max_cc)
192 reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
193 cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
194 reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
196 ret = regmap_update_bits(info->regmap,
198 CHRG_CCCV_CC_MASK, reg_val);
205 static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
210 if (cv <= CV_4100MV) {
211 reg_val = CHRG_CCCV_CV_4100MV;
213 } else if (cv <= CV_4150MV) {
214 reg_val = CHRG_CCCV_CV_4150MV;
216 } else if (cv <= CV_4200MV) {
217 reg_val = CHRG_CCCV_CV_4200MV;
220 reg_val = CHRG_CCCV_CV_4350MV;
224 reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
226 ret = regmap_update_bits(info->regmap,
228 CHRG_CCCV_CV_MASK, reg_val);
236 static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
243 /* Read in limit register */
244 ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
248 if (inlmt <= ILIM_100MA) {
249 reg_val = CHRG_VBUS_ILIM_100MA;
251 } else if (inlmt <= ILIM_500MA) {
252 reg_val = CHRG_VBUS_ILIM_500MA;
254 } else if (inlmt <= ILIM_900MA) {
255 reg_val = CHRG_VBUS_ILIM_900MA;
257 } else if (inlmt <= ILIM_1500MA) {
258 reg_val = CHRG_VBUS_ILIM_1500MA;
260 } else if (inlmt <= ILIM_2000MA) {
261 reg_val = CHRG_VBUS_ILIM_2000MA;
263 } else if (inlmt <= ILIM_2500MA) {
264 reg_val = CHRG_VBUS_ILIM_2500MA;
267 reg_val = CHRG_VBUS_ILIM_3000MA;
271 reg_val = (val & ~CHRG_VBUS_ILIM_MASK)
272 | (reg_val << CHRG_VBUS_ILIM_BIT_POS);
273 ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val);
277 dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
284 static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
290 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
291 VBUS_ISPOUT_VBUS_PATH_DIS, 0);
293 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
294 VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
297 dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
303 static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
309 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
310 CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
312 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
313 CHRG_CCCV_CHG_EN, 0);
315 dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
317 info->is_charger_enabled = enable;
322 static int axp288_charger_is_present(struct axp288_chrg_info *info)
324 int ret, present = 0;
327 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
331 if (val & PS_STAT_VBUS_PRESENT)
336 static int axp288_charger_is_online(struct axp288_chrg_info *info)
341 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
345 if (val & PS_STAT_VBUS_VALID)
350 static int axp288_get_charger_health(struct axp288_chrg_info *info)
352 int ret, pwr_stat, chrg_stat;
353 int health = POWER_SUPPLY_HEALTH_UNKNOWN;
356 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
357 if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT))
358 goto health_read_fail;
362 ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val);
364 goto health_read_fail;
368 if (!(pwr_stat & PS_STAT_VBUS_VALID))
369 health = POWER_SUPPLY_HEALTH_DEAD;
370 else if (chrg_stat & CHRG_STAT_PMIC_OTP)
371 health = POWER_SUPPLY_HEALTH_OVERHEAT;
372 else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE)
373 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
375 health = POWER_SUPPLY_HEALTH_GOOD;
381 static int axp288_charger_usb_set_property(struct power_supply *psy,
382 enum power_supply_property psp,
383 const union power_supply_propval *val)
385 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
389 mutex_lock(&info->lock);
392 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
393 scaled_val = min(val->intval, info->max_cc);
394 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
395 ret = axp288_charger_set_cc(info, scaled_val);
397 dev_warn(&info->pdev->dev, "set charge current failed\n");
399 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
400 scaled_val = min(val->intval, info->max_cv);
401 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
402 ret = axp288_charger_set_cv(info, scaled_val);
404 dev_warn(&info->pdev->dev, "set charge voltage failed\n");
410 mutex_unlock(&info->lock);
414 static int axp288_charger_usb_get_property(struct power_supply *psy,
415 enum power_supply_property psp,
416 union power_supply_propval *val)
418 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
421 mutex_lock(&info->lock);
424 case POWER_SUPPLY_PROP_PRESENT:
425 /* Check for OTG case first */
426 if (info->otg.id_short) {
430 ret = axp288_charger_is_present(info);
432 goto psy_get_prop_fail;
434 val->intval = info->present;
436 case POWER_SUPPLY_PROP_ONLINE:
437 /* Check for OTG case first */
438 if (info->otg.id_short) {
442 ret = axp288_charger_is_online(info);
444 goto psy_get_prop_fail;
446 val->intval = info->online;
448 case POWER_SUPPLY_PROP_HEALTH:
449 val->intval = axp288_get_charger_health(info);
451 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
452 val->intval = info->cc * 1000;
454 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
455 val->intval = info->max_cc * 1000;
457 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
458 val->intval = info->cv * 1000;
460 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
461 val->intval = info->max_cv * 1000;
463 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
464 val->intval = info->inlmt * 1000;
468 goto psy_get_prop_fail;
472 mutex_unlock(&info->lock);
476 static int axp288_charger_property_is_writeable(struct power_supply *psy,
477 enum power_supply_property psp)
482 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
483 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
493 static enum power_supply_property axp288_usb_props[] = {
494 POWER_SUPPLY_PROP_PRESENT,
495 POWER_SUPPLY_PROP_ONLINE,
496 POWER_SUPPLY_PROP_TYPE,
497 POWER_SUPPLY_PROP_HEALTH,
498 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
499 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
500 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
501 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
502 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
505 static const struct power_supply_desc axp288_charger_desc = {
506 .name = "axp288_charger",
507 .type = POWER_SUPPLY_TYPE_USB,
508 .properties = axp288_usb_props,
509 .num_properties = ARRAY_SIZE(axp288_usb_props),
510 .get_property = axp288_charger_usb_get_property,
511 .set_property = axp288_charger_usb_set_property,
512 .property_is_writeable = axp288_charger_property_is_writeable,
515 static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
517 struct axp288_chrg_info *info = dev;
520 for (i = 0; i < CHRG_INTR_END; i++) {
521 if (info->irq[i] == irq)
525 if (i >= CHRG_INTR_END) {
526 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
532 dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
534 case CHARGE_DONE_IRQ:
535 dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
537 case CHARGE_CHARGING_IRQ:
538 dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
540 case BAT_SAFE_QUIT_IRQ:
541 dev_dbg(&info->pdev->dev,
542 "Quit Safe Mode(restart timer) Charging IRQ\n");
544 case BAT_SAFE_ENTER_IRQ:
545 dev_dbg(&info->pdev->dev,
546 "Enter Safe Mode(timer expire) Charging IRQ\n");
549 dev_dbg(&info->pdev->dev,
550 "Quit Battery Under Temperature(CHRG) INTR\n");
553 dev_dbg(&info->pdev->dev,
554 "Hit Battery Under Temperature(CHRG) INTR\n");
557 dev_dbg(&info->pdev->dev,
558 "Quit Battery Over Temperature(CHRG) INTR\n");
561 dev_dbg(&info->pdev->dev,
562 "Hit Battery Over Temperature(CHRG) INTR\n");
565 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
569 power_supply_changed(info->psy_usb);
574 static void axp288_charger_extcon_evt_worker(struct work_struct *work)
576 struct axp288_chrg_info *info =
577 container_of(work, struct axp288_chrg_info, cable.work);
578 int ret, current_limit;
579 bool changed = false;
580 struct extcon_dev *edev = info->cable.edev;
581 bool old_connected = info->cable.connected;
583 /* Determine cable/charger type */
584 if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_SDP) > 0) {
585 dev_dbg(&info->pdev->dev, "USB SDP charger is connected");
586 info->cable.connected = true;
587 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
588 } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_CDP) > 0) {
589 dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
590 info->cable.connected = true;
591 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
592 } else if (extcon_get_cable_state_(edev, EXTCON_CHG_USB_DCP) > 0) {
593 dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
594 info->cable.connected = true;
595 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
598 dev_dbg(&info->pdev->dev, "USB charger disconnected");
599 info->cable.connected = false;
600 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
603 /* Cable status changed */
604 if (old_connected != info->cable.connected)
610 mutex_lock(&info->lock);
612 if (info->is_charger_enabled && !info->cable.connected) {
613 info->enable_charger = false;
614 ret = axp288_charger_enable_charger(info, info->enable_charger);
616 dev_err(&info->pdev->dev,
617 "cannot disable charger (%d)", ret);
619 } else if (!info->is_charger_enabled && info->cable.connected) {
620 switch (info->cable.chg_type) {
621 case POWER_SUPPLY_TYPE_USB:
622 current_limit = ILIM_500MA;
624 case POWER_SUPPLY_TYPE_USB_CDP:
625 current_limit = ILIM_1500MA;
627 case POWER_SUPPLY_TYPE_USB_DCP:
628 current_limit = ILIM_2000MA;
636 /* Set vbus current limit first, then enable charger */
637 ret = axp288_charger_set_vbus_inlmt(info, current_limit);
639 dev_err(&info->pdev->dev,
640 "error setting current limit (%d)", ret);
642 info->enable_charger = (current_limit > 0);
643 ret = axp288_charger_enable_charger(info,
644 info->enable_charger);
646 dev_err(&info->pdev->dev,
647 "cannot enable charger (%d)", ret);
652 info->health = axp288_get_charger_health(info);
654 mutex_unlock(&info->lock);
657 power_supply_changed(info->psy_usb);
660 static int axp288_charger_handle_cable_evt(struct notifier_block *nb,
661 unsigned long event, void *param)
663 struct axp288_chrg_info *info =
664 container_of(nb, struct axp288_chrg_info, cable.nb);
666 schedule_work(&info->cable.work);
671 static void axp288_charger_otg_evt_worker(struct work_struct *work)
673 struct axp288_chrg_info *info =
674 container_of(work, struct axp288_chrg_info, otg.work);
677 /* Disable VBUS path before enabling the 5V boost */
678 ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
680 dev_warn(&info->pdev->dev, "vbus path disable failed\n");
683 static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
684 unsigned long event, void *param)
686 struct axp288_chrg_info *info =
687 container_of(nb, struct axp288_chrg_info, otg.id_nb);
688 struct extcon_dev *edev = info->otg.cable;
689 int usb_host = extcon_get_cable_state_(edev, EXTCON_USB_HOST);
691 dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
692 usb_host ? "attached" : "detached");
695 * Set usb_id_short flag to avoid running charger detection logic
698 info->otg.id_short = usb_host;
699 schedule_work(&info->otg.work);
704 static void charger_init_hw_regs(struct axp288_chrg_info *info)
709 /* Program temperature thresholds */
710 ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
712 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
713 AXP20X_V_LTF_CHRG, ret);
715 ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
717 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
718 AXP20X_V_HTF_CHRG, ret);
720 /* Do not turn-off charger o/p after charge cycle ends */
721 ret = regmap_update_bits(info->regmap,
723 CNTL2_CHG_OUT_TURNON, 1);
725 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
726 AXP20X_CHRG_CTRL2, ret);
728 /* Enable interrupts */
729 ret = regmap_update_bits(info->regmap,
731 BAT_IRQ_CFG_BAT_MASK, 1);
733 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
734 AXP20X_IRQ2_EN, ret);
736 ret = regmap_update_bits(info->regmap, AXP20X_IRQ3_EN,
737 TEMP_IRQ_CFG_MASK, 1);
739 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
740 AXP20X_IRQ3_EN, ret);
742 /* Setup ending condition for charging to be 10% of I(chrg) */
743 ret = regmap_update_bits(info->regmap,
745 CHRG_CCCV_ITERM_20P, 0);
747 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
748 AXP20X_CHRG_CTRL1, ret);
750 /* Disable OCV-SOC curve calibration */
751 ret = regmap_update_bits(info->regmap,
753 FG_CNTL_OCV_ADJ_EN, 0);
755 dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
756 AXP20X_CC_CTRL, ret);
758 /* Init charging current and voltage */
759 info->max_cc = info->pdata->max_cc;
760 info->max_cv = info->pdata->max_cv;
762 /* Read current charge voltage and current limit */
763 ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
765 /* Assume default if cannot read */
766 info->cc = info->pdata->def_cc;
767 info->cv = info->pdata->def_cv;
769 /* Determine charge voltage */
770 cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
772 case CHRG_CCCV_CV_4100MV:
773 info->cv = CV_4100MV;
775 case CHRG_CCCV_CV_4150MV:
776 info->cv = CV_4150MV;
778 case CHRG_CCCV_CV_4200MV:
779 info->cv = CV_4200MV;
781 case CHRG_CCCV_CV_4350MV:
782 info->cv = CV_4350MV;
789 /* Determine charge current limit */
790 cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
791 cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
794 /* Program default charging voltage and current */
795 cc = min(info->pdata->def_cc, info->max_cc);
796 cv = min(info->pdata->def_cv, info->max_cv);
798 ret = axp288_charger_set_cc(info, cc);
800 dev_warn(&info->pdev->dev,
801 "error(%d) in setting CC\n", ret);
803 ret = axp288_charger_set_cv(info, cv);
805 dev_warn(&info->pdev->dev,
806 "error(%d) in setting CV\n", ret);
810 static int axp288_charger_probe(struct platform_device *pdev)
813 struct axp288_chrg_info *info;
814 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
815 struct power_supply_config charger_cfg = {};
817 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
822 info->regmap = axp20x->regmap;
823 info->regmap_irqc = axp20x->regmap_irqc;
824 info->pdata = pdev->dev.platform_data;
827 /* Try ACPI provided pdata via device properties */
828 if (!device_property_present(&pdev->dev,
829 "axp288_charger_data\n"))
830 dev_err(&pdev->dev, "failed to get platform data\n");
834 info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
835 if (info->cable.edev == NULL) {
836 dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
837 AXP288_EXTCON_DEV_NAME);
838 return -EPROBE_DEFER;
841 /* Register for extcon notification */
842 INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
843 info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
844 ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
847 dev_err(&info->pdev->dev,
848 "failed to register extcon notifier for SDP %d\n", ret);
852 ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
855 dev_err(&info->pdev->dev,
856 "failed to register extcon notifier for CDP %d\n", ret);
857 extcon_unregister_notifier(info->cable.edev,
858 EXTCON_CHG_USB_SDP, &info->cable.nb);
862 ret = extcon_register_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
865 dev_err(&info->pdev->dev,
866 "failed to register extcon notifier for DCP %d\n", ret);
867 extcon_unregister_notifier(info->cable.edev,
868 EXTCON_CHG_USB_SDP, &info->cable.nb);
869 extcon_unregister_notifier(info->cable.edev,
870 EXTCON_CHG_USB_CDP, &info->cable.nb);
874 platform_set_drvdata(pdev, info);
875 mutex_init(&info->lock);
877 /* Register with power supply class */
878 charger_cfg.drv_data = info;
879 info->psy_usb = power_supply_register(&pdev->dev, &axp288_charger_desc,
881 if (IS_ERR(info->psy_usb)) {
882 dev_err(&pdev->dev, "failed to register power supply charger\n");
883 ret = PTR_ERR(info->psy_usb);
887 /* Register for OTG notification */
888 INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
889 info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
890 ret = extcon_register_notifier(info->otg.cable, EXTCON_USB_HOST,
893 dev_warn(&pdev->dev, "failed to register otg notifier\n");
896 info->otg.id_short = extcon_get_cable_state_(
897 info->otg.cable, EXTCON_USB_HOST);
899 /* Register charger interrupts */
900 for (i = 0; i < CHRG_INTR_END; i++) {
901 pirq = platform_get_irq(info->pdev, i);
903 dev_err(&pdev->dev, "Failed to get IRQ: %d\n", pirq);
906 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
907 if (info->irq[i] < 0) {
908 dev_warn(&info->pdev->dev,
909 "failed to get virtual interrupt=%d\n", pirq);
911 goto intr_reg_failed;
913 ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
914 NULL, axp288_charger_irq_thread_handler,
915 IRQF_ONESHOT, info->pdev->name, info);
917 dev_err(&pdev->dev, "failed to request interrupt=%d\n",
919 goto intr_reg_failed;
923 charger_init_hw_regs(info);
929 extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST,
931 power_supply_unregister(info->psy_usb);
933 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
935 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
937 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
942 static int axp288_charger_remove(struct platform_device *pdev)
944 struct axp288_chrg_info *info = dev_get_drvdata(&pdev->dev);
947 extcon_unregister_notifier(info->otg.cable, EXTCON_USB_HOST,
950 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_SDP,
952 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_CDP,
954 extcon_unregister_notifier(info->cable.edev, EXTCON_CHG_USB_DCP,
956 power_supply_unregister(info->psy_usb);
961 static struct platform_driver axp288_charger_driver = {
962 .probe = axp288_charger_probe,
963 .remove = axp288_charger_remove,
965 .name = "axp288_charger",
969 module_platform_driver(axp288_charger_driver);
971 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
972 MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
973 MODULE_LICENSE("GPL v2");