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/acpi.h>
18 #include <linux/module.h>
19 #include <linux/device.h>
20 #include <linux/regmap.h>
21 #include <linux/workqueue.h>
22 #include <linux/delay.h>
23 #include <linux/platform_device.h>
24 #include <linux/usb/otg.h>
25 #include <linux/notifier.h>
26 #include <linux/power_supply.h>
27 #include <linux/property.h>
28 #include <linux/mfd/axp20x.h>
29 #include <linux/extcon.h>
31 #define PS_STAT_VBUS_TRIGGER (1 << 0)
32 #define PS_STAT_BAT_CHRG_DIR (1 << 2)
33 #define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
34 #define PS_STAT_VBUS_VALID (1 << 4)
35 #define PS_STAT_VBUS_PRESENT (1 << 5)
37 #define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
38 #define CHRG_STAT_BAT_VALID (1 << 4)
39 #define CHRG_STAT_BAT_PRESENT (1 << 5)
40 #define CHRG_STAT_CHARGING (1 << 6)
41 #define CHRG_STAT_PMIC_OTP (1 << 7)
43 #define VBUS_ISPOUT_CUR_LIM_MASK 0x03
44 #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
45 #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */
46 #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */
47 #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */
48 #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */
49 #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31
50 #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
51 #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */
52 #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */
53 #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */
54 #define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7)
56 #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
57 #define CHRG_CCCV_CC_BIT_POS 0
58 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
59 #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
60 #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
61 #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
62 #define CHRG_CCCV_CV_BIT_POS 5
63 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
64 #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
65 #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
66 #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
67 #define CHRG_CCCV_CHG_EN (1 << 7)
69 #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */
70 #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */
71 #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */
72 #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */
73 #define CNTL2_CHGLED_TYPEB (1 << 4)
74 #define CNTL2_CHG_OUT_TURNON (1 << 5)
75 #define CNTL2_PC_TIMEOUT_MASK 0xC0
76 #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */
77 #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */
78 #define CNTL2_PC_TIMEOUT_70MINS 0x3
80 #define CHRG_ILIM_TEMP_LOOP_EN (1 << 3)
81 #define CHRG_VBUS_ILIM_MASK 0xf0
82 #define CHRG_VBUS_ILIM_BIT_POS 4
83 #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */
84 #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */
85 #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */
86 #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */
87 #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */
88 #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */
89 #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */
91 #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */
92 #define CHRG_VHTFC_45C 0x1F /* 45 DegC */
94 #define FG_CNTL_OCV_ADJ_EN (1 << 3)
96 #define CV_4100MV 4100 /* 4100mV */
97 #define CV_4150MV 4150 /* 4150mV */
98 #define CV_4200MV 4200 /* 4200mV */
99 #define CV_4350MV 4350 /* 4350mV */
101 #define CC_200MA 200 /* 200mA */
102 #define CC_600MA 600 /* 600mA */
103 #define CC_800MA 800 /* 800mA */
104 #define CC_1000MA 1000 /* 1000mA */
105 #define CC_1600MA 1600 /* 1600mA */
106 #define CC_2000MA 2000 /* 2000mA */
108 #define ILIM_100MA 100 /* 100mA */
109 #define ILIM_500MA 500 /* 500mA */
110 #define ILIM_900MA 900 /* 900mA */
111 #define ILIM_1500MA 1500 /* 1500mA */
112 #define ILIM_2000MA 2000 /* 2000mA */
113 #define ILIM_2500MA 2500 /* 2500mA */
114 #define ILIM_3000MA 3000 /* 3000mA */
116 #define AXP288_EXTCON_DEV_NAME "axp288_extcon"
117 #define USB_HOST_EXTCON_HID "INT3496"
118 #define USB_HOST_EXTCON_NAME "INT3496:00"
120 static const unsigned int cable_ids[] =
121 { EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_CDP, EXTCON_CHG_USB_DCP };
136 struct axp288_chrg_info {
137 struct platform_device *pdev;
138 struct regmap *regmap;
139 struct regmap_irq_chip_data *regmap_irqc;
140 int irq[CHRG_INTR_END];
141 struct power_supply *psy_usb;
146 struct work_struct work;
147 struct extcon_dev *cable;
148 struct notifier_block id_nb;
152 /* SDP/CDP/DCP USB charging cable notifications */
154 struct extcon_dev *edev;
156 enum power_supply_type chg_type;
157 struct notifier_block nb[ARRAY_SIZE(cable_ids)];
158 struct work_struct work;
166 int is_charger_enabled;
169 static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
174 if (cc < CHRG_CCCV_CC_OFFSET)
175 cc = CHRG_CCCV_CC_OFFSET;
176 else if (cc > info->max_cc)
179 reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
180 cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
181 reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
183 ret = regmap_update_bits(info->regmap,
185 CHRG_CCCV_CC_MASK, reg_val);
192 static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
197 if (cv <= CV_4100MV) {
198 reg_val = CHRG_CCCV_CV_4100MV;
200 } else if (cv <= CV_4150MV) {
201 reg_val = CHRG_CCCV_CV_4150MV;
203 } else if (cv <= CV_4200MV) {
204 reg_val = CHRG_CCCV_CV_4200MV;
207 reg_val = CHRG_CCCV_CV_4350MV;
211 reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
213 ret = regmap_update_bits(info->regmap,
215 CHRG_CCCV_CV_MASK, reg_val);
223 static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
230 /* Read in limit register */
231 ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
235 if (inlmt <= ILIM_100MA) {
236 reg_val = CHRG_VBUS_ILIM_100MA;
238 } else if (inlmt <= ILIM_500MA) {
239 reg_val = CHRG_VBUS_ILIM_500MA;
241 } else if (inlmt <= ILIM_900MA) {
242 reg_val = CHRG_VBUS_ILIM_900MA;
244 } else if (inlmt <= ILIM_1500MA) {
245 reg_val = CHRG_VBUS_ILIM_1500MA;
247 } else if (inlmt <= ILIM_2000MA) {
248 reg_val = CHRG_VBUS_ILIM_2000MA;
250 } else if (inlmt <= ILIM_2500MA) {
251 reg_val = CHRG_VBUS_ILIM_2500MA;
254 reg_val = CHRG_VBUS_ILIM_3000MA;
258 reg_val = (val & ~CHRG_VBUS_ILIM_MASK)
259 | (reg_val << CHRG_VBUS_ILIM_BIT_POS);
260 ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val);
264 dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
271 static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
277 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
278 VBUS_ISPOUT_VBUS_PATH_DIS, 0);
280 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
281 VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
284 dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
290 static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
295 if ((int)enable == info->is_charger_enabled)
299 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
300 CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
302 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
303 CHRG_CCCV_CHG_EN, 0);
305 dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
307 info->is_charger_enabled = enable;
312 static int axp288_charger_is_present(struct axp288_chrg_info *info)
314 int ret, present = 0;
317 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
321 if (val & PS_STAT_VBUS_PRESENT)
326 static int axp288_charger_is_online(struct axp288_chrg_info *info)
331 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
335 if (val & PS_STAT_VBUS_VALID)
340 static int axp288_get_charger_health(struct axp288_chrg_info *info)
342 int ret, pwr_stat, chrg_stat;
343 int health = POWER_SUPPLY_HEALTH_UNKNOWN;
346 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
347 if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT))
348 goto health_read_fail;
352 ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val);
354 goto health_read_fail;
358 if (!(pwr_stat & PS_STAT_VBUS_VALID))
359 health = POWER_SUPPLY_HEALTH_DEAD;
360 else if (chrg_stat & CHRG_STAT_PMIC_OTP)
361 health = POWER_SUPPLY_HEALTH_OVERHEAT;
362 else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE)
363 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
365 health = POWER_SUPPLY_HEALTH_GOOD;
371 static int axp288_charger_usb_set_property(struct power_supply *psy,
372 enum power_supply_property psp,
373 const union power_supply_propval *val)
375 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
379 mutex_lock(&info->lock);
382 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
383 scaled_val = min(val->intval, info->max_cc);
384 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
385 ret = axp288_charger_set_cc(info, scaled_val);
387 dev_warn(&info->pdev->dev, "set charge current failed\n");
389 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
390 scaled_val = min(val->intval, info->max_cv);
391 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
392 ret = axp288_charger_set_cv(info, scaled_val);
394 dev_warn(&info->pdev->dev, "set charge voltage failed\n");
400 mutex_unlock(&info->lock);
404 static int axp288_charger_usb_get_property(struct power_supply *psy,
405 enum power_supply_property psp,
406 union power_supply_propval *val)
408 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
411 mutex_lock(&info->lock);
414 case POWER_SUPPLY_PROP_PRESENT:
415 /* Check for OTG case first */
416 if (info->otg.id_short) {
420 ret = axp288_charger_is_present(info);
422 goto psy_get_prop_fail;
425 case POWER_SUPPLY_PROP_ONLINE:
426 /* Check for OTG case first */
427 if (info->otg.id_short) {
431 ret = axp288_charger_is_online(info);
433 goto psy_get_prop_fail;
436 case POWER_SUPPLY_PROP_HEALTH:
437 val->intval = axp288_get_charger_health(info);
439 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
440 val->intval = info->cc * 1000;
442 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
443 val->intval = info->max_cc * 1000;
445 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
446 val->intval = info->cv * 1000;
448 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
449 val->intval = info->max_cv * 1000;
451 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
452 val->intval = info->inlmt * 1000;
456 goto psy_get_prop_fail;
460 mutex_unlock(&info->lock);
464 static int axp288_charger_property_is_writeable(struct power_supply *psy,
465 enum power_supply_property psp)
470 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
471 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
481 static enum power_supply_property axp288_usb_props[] = {
482 POWER_SUPPLY_PROP_PRESENT,
483 POWER_SUPPLY_PROP_ONLINE,
484 POWER_SUPPLY_PROP_TYPE,
485 POWER_SUPPLY_PROP_HEALTH,
486 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
487 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
488 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
489 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
490 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
493 static const struct power_supply_desc axp288_charger_desc = {
494 .name = "axp288_charger",
495 .type = POWER_SUPPLY_TYPE_USB,
496 .properties = axp288_usb_props,
497 .num_properties = ARRAY_SIZE(axp288_usb_props),
498 .get_property = axp288_charger_usb_get_property,
499 .set_property = axp288_charger_usb_set_property,
500 .property_is_writeable = axp288_charger_property_is_writeable,
503 static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
505 struct axp288_chrg_info *info = dev;
508 for (i = 0; i < CHRG_INTR_END; i++) {
509 if (info->irq[i] == irq)
513 if (i >= CHRG_INTR_END) {
514 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
520 dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
522 case CHARGE_DONE_IRQ:
523 dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
525 case CHARGE_CHARGING_IRQ:
526 dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
528 case BAT_SAFE_QUIT_IRQ:
529 dev_dbg(&info->pdev->dev,
530 "Quit Safe Mode(restart timer) Charging IRQ\n");
532 case BAT_SAFE_ENTER_IRQ:
533 dev_dbg(&info->pdev->dev,
534 "Enter Safe Mode(timer expire) Charging IRQ\n");
537 dev_dbg(&info->pdev->dev,
538 "Quit Battery Under Temperature(CHRG) INTR\n");
541 dev_dbg(&info->pdev->dev,
542 "Hit Battery Under Temperature(CHRG) INTR\n");
545 dev_dbg(&info->pdev->dev,
546 "Quit Battery Over Temperature(CHRG) INTR\n");
549 dev_dbg(&info->pdev->dev,
550 "Hit Battery Over Temperature(CHRG) INTR\n");
553 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
557 power_supply_changed(info->psy_usb);
562 static void axp288_charger_extcon_evt_worker(struct work_struct *work)
564 struct axp288_chrg_info *info =
565 container_of(work, struct axp288_chrg_info, cable.work);
566 int ret, current_limit;
567 struct extcon_dev *edev = info->cable.edev;
568 bool old_connected = info->cable.connected;
569 enum power_supply_type old_chg_type = info->cable.chg_type;
571 /* Determine cable/charger type */
572 if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
573 dev_dbg(&info->pdev->dev, "USB SDP charger is connected");
574 info->cable.connected = true;
575 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
576 } else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
577 dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
578 info->cable.connected = true;
579 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
580 } else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
581 dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
582 info->cable.connected = true;
583 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
586 dev_dbg(&info->pdev->dev, "USB charger disconnected");
587 info->cable.connected = false;
588 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
591 /* Cable status changed */
592 if (old_connected == info->cable.connected &&
593 old_chg_type == info->cable.chg_type)
596 mutex_lock(&info->lock);
598 if (info->cable.connected) {
599 axp288_charger_enable_charger(info, false);
601 switch (info->cable.chg_type) {
602 case POWER_SUPPLY_TYPE_USB:
603 current_limit = ILIM_500MA;
605 case POWER_SUPPLY_TYPE_USB_CDP:
606 current_limit = ILIM_1500MA;
608 case POWER_SUPPLY_TYPE_USB_DCP:
609 current_limit = ILIM_2000MA;
617 /* Set vbus current limit first, then enable charger */
618 ret = axp288_charger_set_vbus_inlmt(info, current_limit);
620 axp288_charger_enable_charger(info, true);
622 dev_err(&info->pdev->dev,
623 "error setting current limit (%d)", ret);
625 axp288_charger_enable_charger(info, false);
628 mutex_unlock(&info->lock);
630 power_supply_changed(info->psy_usb);
634 * We need 3 copies of this, because there is no way to find out for which
635 * cable id we are being called from the passed in arguments; and we must
636 * have a separate nb for each extcon_register_notifier call.
638 static int axp288_charger_handle_cable0_evt(struct notifier_block *nb,
639 unsigned long event, void *param)
641 struct axp288_chrg_info *info =
642 container_of(nb, struct axp288_chrg_info, cable.nb[0]);
643 schedule_work(&info->cable.work);
647 static int axp288_charger_handle_cable1_evt(struct notifier_block *nb,
648 unsigned long event, void *param)
650 struct axp288_chrg_info *info =
651 container_of(nb, struct axp288_chrg_info, cable.nb[1]);
652 schedule_work(&info->cable.work);
656 static int axp288_charger_handle_cable2_evt(struct notifier_block *nb,
657 unsigned long event, void *param)
659 struct axp288_chrg_info *info =
660 container_of(nb, struct axp288_chrg_info, cable.nb[2]);
661 schedule_work(&info->cable.work);
665 static void axp288_charger_otg_evt_worker(struct work_struct *work)
667 struct axp288_chrg_info *info =
668 container_of(work, struct axp288_chrg_info, otg.work);
669 struct extcon_dev *edev = info->otg.cable;
670 int ret, usb_host = extcon_get_state(edev, EXTCON_USB_HOST);
672 dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
673 usb_host ? "attached" : "detached");
676 * Set usb_id_short flag to avoid running charger detection logic
679 info->otg.id_short = usb_host;
681 /* Disable VBUS path before enabling the 5V boost */
682 ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
684 dev_warn(&info->pdev->dev, "vbus path disable failed\n");
687 static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
688 unsigned long event, void *param)
690 struct axp288_chrg_info *info =
691 container_of(nb, struct axp288_chrg_info, otg.id_nb);
693 schedule_work(&info->otg.work);
698 static int charger_init_hw_regs(struct axp288_chrg_info *info)
703 /* Program temperature thresholds */
704 ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
706 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
707 AXP20X_V_LTF_CHRG, ret);
711 ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
713 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
714 AXP20X_V_HTF_CHRG, ret);
718 /* Do not turn-off charger o/p after charge cycle ends */
719 ret = regmap_update_bits(info->regmap,
721 CNTL2_CHG_OUT_TURNON, CNTL2_CHG_OUT_TURNON);
723 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
724 AXP20X_CHRG_CTRL2, ret);
728 /* Setup ending condition for charging to be 10% of I(chrg) */
729 ret = regmap_update_bits(info->regmap,
731 CHRG_CCCV_ITERM_20P, 0);
733 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
734 AXP20X_CHRG_CTRL1, ret);
738 /* Disable OCV-SOC curve calibration */
739 ret = regmap_update_bits(info->regmap,
741 FG_CNTL_OCV_ADJ_EN, 0);
743 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
744 AXP20X_CC_CTRL, ret);
748 /* Read current charge voltage and current limit */
749 ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
751 dev_err(&info->pdev->dev, "register(%x) read error(%d)\n",
752 AXP20X_CHRG_CTRL1, ret);
756 /* Determine charge voltage */
757 cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
759 case CHRG_CCCV_CV_4100MV:
760 info->cv = CV_4100MV;
762 case CHRG_CCCV_CV_4150MV:
763 info->cv = CV_4150MV;
765 case CHRG_CCCV_CV_4200MV:
766 info->cv = CV_4200MV;
768 case CHRG_CCCV_CV_4350MV:
769 info->cv = CV_4350MV;
773 /* Determine charge current limit */
774 cc = (val & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
775 cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
779 * Do not allow the user to configure higher settings then those
780 * set by the firmware
782 info->max_cv = info->cv;
783 info->max_cc = info->cc;
788 static void axp288_charger_cancel_work(void *data)
790 struct axp288_chrg_info *info = data;
792 cancel_work_sync(&info->otg.work);
793 cancel_work_sync(&info->cable.work);
796 static int axp288_charger_probe(struct platform_device *pdev)
799 struct axp288_chrg_info *info;
800 struct device *dev = &pdev->dev;
801 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
802 struct power_supply_config charger_cfg = {};
803 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
808 info->regmap = axp20x->regmap;
809 info->regmap_irqc = axp20x->regmap_irqc;
810 info->cable.chg_type = -1;
811 info->is_charger_enabled = -1;
813 info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
814 if (info->cable.edev == NULL) {
815 dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
816 AXP288_EXTCON_DEV_NAME);
817 return -EPROBE_DEFER;
820 if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1)) {
821 info->otg.cable = extcon_get_extcon_dev(USB_HOST_EXTCON_NAME);
822 if (info->otg.cable == NULL) {
823 dev_dbg(dev, "EXTCON_USB_HOST is not ready, probe deferred\n");
824 return -EPROBE_DEFER;
827 "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");
830 platform_set_drvdata(pdev, info);
831 mutex_init(&info->lock);
833 ret = charger_init_hw_regs(info);
837 /* Register with power supply class */
838 charger_cfg.drv_data = info;
839 info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc,
841 if (IS_ERR(info->psy_usb)) {
842 ret = PTR_ERR(info->psy_usb);
843 dev_err(dev, "failed to register power supply: %d\n", ret);
847 /* Cancel our work on cleanup, register this before the notifiers */
848 ret = devm_add_action(dev, axp288_charger_cancel_work, info);
852 /* Register for extcon notification */
853 INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
854 info->cable.nb[0].notifier_call = axp288_charger_handle_cable0_evt;
855 info->cable.nb[1].notifier_call = axp288_charger_handle_cable1_evt;
856 info->cable.nb[2].notifier_call = axp288_charger_handle_cable2_evt;
857 for (i = 0; i < ARRAY_SIZE(cable_ids); i++) {
858 ret = devm_extcon_register_notifier(dev, info->cable.edev,
859 cable_ids[i], &info->cable.nb[i]);
861 dev_err(dev, "failed to register extcon notifier for %u: %d\n",
866 schedule_work(&info->cable.work);
868 /* Register for OTG notification */
869 INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
870 info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
871 if (info->otg.cable) {
872 ret = devm_extcon_register_notifier(&pdev->dev, info->otg.cable,
873 EXTCON_USB_HOST, &info->otg.id_nb);
875 dev_err(dev, "failed to register EXTCON_USB_HOST notifier\n");
878 schedule_work(&info->otg.work);
881 /* Register charger interrupts */
882 for (i = 0; i < CHRG_INTR_END; i++) {
883 pirq = platform_get_irq(info->pdev, i);
885 dev_err(&pdev->dev, "Failed to get IRQ: %d\n", pirq);
888 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
889 if (info->irq[i] < 0) {
890 dev_warn(&info->pdev->dev,
891 "failed to get virtual interrupt=%d\n", pirq);
894 ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
895 NULL, axp288_charger_irq_thread_handler,
896 IRQF_ONESHOT, info->pdev->name, info);
898 dev_err(&pdev->dev, "failed to request interrupt=%d\n",
907 static const struct platform_device_id axp288_charger_id_table[] = {
908 { .name = "axp288_charger" },
911 MODULE_DEVICE_TABLE(platform, axp288_charger_id_table);
913 static struct platform_driver axp288_charger_driver = {
914 .probe = axp288_charger_probe,
915 .id_table = axp288_charger_id_table,
917 .name = "axp288_charger",
921 module_platform_driver(axp288_charger_driver);
923 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
924 MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
925 MODULE_LICENSE("GPL v2");