1 // SPDX-License-Identifier: GPL-2.0-only
3 * axp288_charger.c - X-power AXP288 PMIC Charger driver
5 * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
6 * Copyright (C) 2014 Intel Corporation
7 * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
10 #include <linux/acpi.h>
11 #include <linux/bitops.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/regmap.h>
15 #include <linux/workqueue.h>
16 #include <linux/delay.h>
17 #include <linux/platform_device.h>
18 #include <linux/usb/otg.h>
19 #include <linux/notifier.h>
20 #include <linux/power_supply.h>
21 #include <linux/property.h>
22 #include <linux/mfd/axp20x.h>
23 #include <linux/extcon.h>
25 #define PS_STAT_VBUS_TRIGGER BIT(0)
26 #define PS_STAT_BAT_CHRG_DIR BIT(2)
27 #define PS_STAT_VBAT_ABOVE_VHOLD BIT(3)
28 #define PS_STAT_VBUS_VALID BIT(4)
29 #define PS_STAT_VBUS_PRESENT BIT(5)
31 #define CHRG_STAT_BAT_SAFE_MODE BIT(3)
32 #define CHRG_STAT_BAT_VALID BIT(4)
33 #define CHRG_STAT_BAT_PRESENT BIT(5)
34 #define CHRG_STAT_CHARGING BIT(6)
35 #define CHRG_STAT_PMIC_OTP BIT(7)
37 #define VBUS_ISPOUT_CUR_LIM_MASK 0x03
38 #define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
39 #define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */
40 #define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */
41 #define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */
42 #define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */
43 #define VBUS_ISPOUT_VHOLD_SET_MASK 0x31
44 #define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
45 #define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */
46 #define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */
47 #define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */
48 #define VBUS_ISPOUT_VBUS_PATH_DIS BIT(7)
50 #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
51 #define CHRG_CCCV_CC_BIT_POS 0
52 #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
53 #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
54 #define CHRG_CCCV_ITERM_20P BIT(4) /* 20% of CC */
55 #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
56 #define CHRG_CCCV_CV_BIT_POS 5
57 #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
58 #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
59 #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
60 #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
61 #define CHRG_CCCV_CHG_EN BIT(7)
63 #define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */
64 #define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */
65 #define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */
66 #define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */
67 #define CNTL2_CHGLED_TYPEB BIT(4)
68 #define CNTL2_CHG_OUT_TURNON BIT(5)
69 #define CNTL2_PC_TIMEOUT_MASK 0xC0
70 #define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */
71 #define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */
72 #define CNTL2_PC_TIMEOUT_70MINS 0x3
74 #define CHRG_ILIM_TEMP_LOOP_EN BIT(3)
75 #define CHRG_VBUS_ILIM_MASK 0xf0
76 #define CHRG_VBUS_ILIM_BIT_POS 4
77 #define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */
78 #define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */
79 #define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */
80 #define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */
81 #define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */
82 #define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */
83 #define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */
84 #define CHRG_VBUS_ILIM_3500MA 0x7 /* 3500mA */
85 #define CHRG_VBUS_ILIM_4000MA 0x8 /* 4000mA */
87 #define CHRG_VLTFC_0C 0xA5 /* 0 DegC */
88 #define CHRG_VHTFC_45C 0x1F /* 45 DegC */
90 #define FG_CNTL_OCV_ADJ_EN BIT(3)
92 #define CV_4100MV 4100 /* 4100mV */
93 #define CV_4150MV 4150 /* 4150mV */
94 #define CV_4200MV 4200 /* 4200mV */
95 #define CV_4350MV 4350 /* 4350mV */
97 #define AXP288_EXTCON_DEV_NAME "axp288_extcon"
98 #define USB_HOST_EXTCON_HID "INT3496"
99 #define USB_HOST_EXTCON_NAME "INT3496:00"
114 struct axp288_chrg_info {
115 struct platform_device *pdev;
116 struct regmap *regmap;
117 struct regmap_irq_chip_data *regmap_irqc;
118 int irq[CHRG_INTR_END];
119 struct power_supply *psy_usb;
123 struct work_struct work;
124 struct extcon_dev *cable;
125 struct notifier_block id_nb;
129 /* SDP/CDP/DCP USB charging cable notifications */
131 struct extcon_dev *edev;
132 struct notifier_block nb;
133 struct work_struct work;
142 static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
147 if (cc < CHRG_CCCV_CC_OFFSET)
148 cc = CHRG_CCCV_CC_OFFSET;
149 else if (cc > info->max_cc)
152 reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
153 cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
154 reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
156 ret = regmap_update_bits(info->regmap,
158 CHRG_CCCV_CC_MASK, reg_val);
165 static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
170 if (cv <= CV_4100MV) {
171 reg_val = CHRG_CCCV_CV_4100MV;
173 } else if (cv <= CV_4150MV) {
174 reg_val = CHRG_CCCV_CV_4150MV;
176 } else if (cv <= CV_4200MV) {
177 reg_val = CHRG_CCCV_CV_4200MV;
180 reg_val = CHRG_CCCV_CV_4350MV;
184 reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
186 ret = regmap_update_bits(info->regmap,
188 CHRG_CCCV_CV_MASK, reg_val);
196 static int axp288_charger_get_vbus_inlmt(struct axp288_chrg_info *info)
201 ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
205 val >>= CHRG_VBUS_ILIM_BIT_POS;
207 case CHRG_VBUS_ILIM_100MA:
209 case CHRG_VBUS_ILIM_500MA:
211 case CHRG_VBUS_ILIM_900MA:
213 case CHRG_VBUS_ILIM_1500MA:
215 case CHRG_VBUS_ILIM_2000MA:
217 case CHRG_VBUS_ILIM_2500MA:
219 case CHRG_VBUS_ILIM_3000MA:
221 case CHRG_VBUS_ILIM_3500MA:
224 /* All b1xxx values map to 4000 mA */
229 static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
235 if (inlmt >= 4000000)
236 reg_val = CHRG_VBUS_ILIM_4000MA << CHRG_VBUS_ILIM_BIT_POS;
237 else if (inlmt >= 3500000)
238 reg_val = CHRG_VBUS_ILIM_3500MA << CHRG_VBUS_ILIM_BIT_POS;
239 else if (inlmt >= 3000000)
240 reg_val = CHRG_VBUS_ILIM_3000MA << CHRG_VBUS_ILIM_BIT_POS;
241 else if (inlmt >= 2500000)
242 reg_val = CHRG_VBUS_ILIM_2500MA << CHRG_VBUS_ILIM_BIT_POS;
243 else if (inlmt >= 2000000)
244 reg_val = CHRG_VBUS_ILIM_2000MA << CHRG_VBUS_ILIM_BIT_POS;
245 else if (inlmt >= 1500000)
246 reg_val = CHRG_VBUS_ILIM_1500MA << CHRG_VBUS_ILIM_BIT_POS;
247 else if (inlmt >= 900000)
248 reg_val = CHRG_VBUS_ILIM_900MA << CHRG_VBUS_ILIM_BIT_POS;
249 else if (inlmt >= 500000)
250 reg_val = CHRG_VBUS_ILIM_500MA << CHRG_VBUS_ILIM_BIT_POS;
252 reg_val = CHRG_VBUS_ILIM_100MA << CHRG_VBUS_ILIM_BIT_POS;
254 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_BAK_CTRL,
255 CHRG_VBUS_ILIM_MASK, reg_val);
257 dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
262 static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
268 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
269 VBUS_ISPOUT_VBUS_PATH_DIS, 0);
271 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
272 VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
275 dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
280 static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
286 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
287 CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
289 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
290 CHRG_CCCV_CHG_EN, 0);
292 dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
297 static int axp288_charger_is_present(struct axp288_chrg_info *info)
299 int ret, present = 0;
302 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
306 if (val & PS_STAT_VBUS_PRESENT)
311 static int axp288_charger_is_online(struct axp288_chrg_info *info)
316 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
320 if (val & PS_STAT_VBUS_VALID)
325 static int axp288_get_charger_health(struct axp288_chrg_info *info)
327 int ret, pwr_stat, chrg_stat;
328 int health = POWER_SUPPLY_HEALTH_UNKNOWN;
331 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
332 if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT))
333 goto health_read_fail;
337 ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val);
339 goto health_read_fail;
343 if (!(pwr_stat & PS_STAT_VBUS_VALID))
344 health = POWER_SUPPLY_HEALTH_DEAD;
345 else if (chrg_stat & CHRG_STAT_PMIC_OTP)
346 health = POWER_SUPPLY_HEALTH_OVERHEAT;
347 else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE)
348 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
350 health = POWER_SUPPLY_HEALTH_GOOD;
356 static int axp288_charger_usb_set_property(struct power_supply *psy,
357 enum power_supply_property psp,
358 const union power_supply_propval *val)
360 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
365 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
366 scaled_val = min(val->intval, info->max_cc);
367 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
368 ret = axp288_charger_set_cc(info, scaled_val);
370 dev_warn(&info->pdev->dev, "set charge current failed\n");
372 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
373 scaled_val = min(val->intval, info->max_cv);
374 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
375 ret = axp288_charger_set_cv(info, scaled_val);
377 dev_warn(&info->pdev->dev, "set charge voltage failed\n");
379 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
380 ret = axp288_charger_set_vbus_inlmt(info, val->intval);
382 dev_warn(&info->pdev->dev, "set input current limit failed\n");
391 static int axp288_charger_usb_get_property(struct power_supply *psy,
392 enum power_supply_property psp,
393 union power_supply_propval *val)
395 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
399 case POWER_SUPPLY_PROP_PRESENT:
400 /* Check for OTG case first */
401 if (info->otg.id_short) {
405 ret = axp288_charger_is_present(info);
410 case POWER_SUPPLY_PROP_ONLINE:
411 /* Check for OTG case first */
412 if (info->otg.id_short) {
416 ret = axp288_charger_is_online(info);
421 case POWER_SUPPLY_PROP_HEALTH:
422 val->intval = axp288_get_charger_health(info);
424 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
425 val->intval = info->cc * 1000;
427 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
428 val->intval = info->max_cc * 1000;
430 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
431 val->intval = info->cv * 1000;
433 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
434 val->intval = info->max_cv * 1000;
436 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
437 ret = axp288_charger_get_vbus_inlmt(info);
449 static int axp288_charger_property_is_writeable(struct power_supply *psy,
450 enum power_supply_property psp)
455 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
456 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
457 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
467 static enum power_supply_property axp288_usb_props[] = {
468 POWER_SUPPLY_PROP_PRESENT,
469 POWER_SUPPLY_PROP_ONLINE,
470 POWER_SUPPLY_PROP_TYPE,
471 POWER_SUPPLY_PROP_HEALTH,
472 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
473 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
474 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
475 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
476 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
479 static const struct power_supply_desc axp288_charger_desc = {
480 .name = "axp288_charger",
481 .type = POWER_SUPPLY_TYPE_USB,
482 .properties = axp288_usb_props,
483 .num_properties = ARRAY_SIZE(axp288_usb_props),
484 .get_property = axp288_charger_usb_get_property,
485 .set_property = axp288_charger_usb_set_property,
486 .property_is_writeable = axp288_charger_property_is_writeable,
489 static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
491 struct axp288_chrg_info *info = dev;
494 for (i = 0; i < CHRG_INTR_END; i++) {
495 if (info->irq[i] == irq)
499 if (i >= CHRG_INTR_END) {
500 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
506 dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
508 case CHARGE_DONE_IRQ:
509 dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
511 case CHARGE_CHARGING_IRQ:
512 dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
514 case BAT_SAFE_QUIT_IRQ:
515 dev_dbg(&info->pdev->dev,
516 "Quit Safe Mode(restart timer) Charging IRQ\n");
518 case BAT_SAFE_ENTER_IRQ:
519 dev_dbg(&info->pdev->dev,
520 "Enter Safe Mode(timer expire) Charging IRQ\n");
523 dev_dbg(&info->pdev->dev,
524 "Quit Battery Under Temperature(CHRG) INTR\n");
527 dev_dbg(&info->pdev->dev,
528 "Hit Battery Under Temperature(CHRG) INTR\n");
531 dev_dbg(&info->pdev->dev,
532 "Quit Battery Over Temperature(CHRG) INTR\n");
535 dev_dbg(&info->pdev->dev,
536 "Hit Battery Over Temperature(CHRG) INTR\n");
539 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
543 power_supply_changed(info->psy_usb);
548 static void axp288_charger_extcon_evt_worker(struct work_struct *work)
550 struct axp288_chrg_info *info =
551 container_of(work, struct axp288_chrg_info, cable.work);
552 int ret, current_limit;
553 struct extcon_dev *edev = info->cable.edev;
556 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
558 dev_err(&info->pdev->dev, "Error reading status (%d)\n", ret);
562 /* Offline? Disable charging and bail */
563 if (!(val & PS_STAT_VBUS_VALID)) {
564 dev_dbg(&info->pdev->dev, "USB charger disconnected\n");
565 axp288_charger_enable_charger(info, false);
566 power_supply_changed(info->psy_usb);
570 /* Determine cable/charger type */
571 if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
572 dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n");
573 current_limit = 500000;
574 } else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
575 dev_dbg(&info->pdev->dev, "USB CDP charger is connected\n");
576 current_limit = 1500000;
577 } else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
578 dev_dbg(&info->pdev->dev, "USB DCP charger is connected\n");
579 current_limit = 2000000;
581 /* Charger type detection still in progress, bail. */
585 /* Set vbus current limit first, then enable charger */
586 ret = axp288_charger_set_vbus_inlmt(info, current_limit);
588 axp288_charger_enable_charger(info, true);
590 dev_err(&info->pdev->dev,
591 "error setting current limit (%d)\n", ret);
593 power_supply_changed(info->psy_usb);
596 static int axp288_charger_handle_cable_evt(struct notifier_block *nb,
597 unsigned long event, void *param)
599 struct axp288_chrg_info *info =
600 container_of(nb, struct axp288_chrg_info, cable.nb);
601 schedule_work(&info->cable.work);
605 static void axp288_charger_otg_evt_worker(struct work_struct *work)
607 struct axp288_chrg_info *info =
608 container_of(work, struct axp288_chrg_info, otg.work);
609 struct extcon_dev *edev = info->otg.cable;
610 int ret, usb_host = extcon_get_state(edev, EXTCON_USB_HOST);
612 dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
613 usb_host ? "attached" : "detached");
616 * Set usb_id_short flag to avoid running charger detection logic
619 info->otg.id_short = usb_host;
621 /* Disable VBUS path before enabling the 5V boost */
622 ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
624 dev_warn(&info->pdev->dev, "vbus path disable failed\n");
627 static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
628 unsigned long event, void *param)
630 struct axp288_chrg_info *info =
631 container_of(nb, struct axp288_chrg_info, otg.id_nb);
633 schedule_work(&info->otg.work);
638 static int charger_init_hw_regs(struct axp288_chrg_info *info)
643 /* Program temperature thresholds */
644 ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
646 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
647 AXP20X_V_LTF_CHRG, ret);
651 ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
653 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
654 AXP20X_V_HTF_CHRG, ret);
658 /* Do not turn-off charger o/p after charge cycle ends */
659 ret = regmap_update_bits(info->regmap,
661 CNTL2_CHG_OUT_TURNON, CNTL2_CHG_OUT_TURNON);
663 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
664 AXP20X_CHRG_CTRL2, ret);
668 /* Setup ending condition for charging to be 10% of I(chrg) */
669 ret = regmap_update_bits(info->regmap,
671 CHRG_CCCV_ITERM_20P, 0);
673 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
674 AXP20X_CHRG_CTRL1, ret);
678 /* Disable OCV-SOC curve calibration */
679 ret = regmap_update_bits(info->regmap,
681 FG_CNTL_OCV_ADJ_EN, 0);
683 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
684 AXP20X_CC_CTRL, ret);
688 /* Read current charge voltage and current limit */
689 ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
691 dev_err(&info->pdev->dev, "register(%x) read error(%d)\n",
692 AXP20X_CHRG_CTRL1, ret);
696 /* Determine charge voltage */
697 cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
699 case CHRG_CCCV_CV_4100MV:
700 info->cv = CV_4100MV;
702 case CHRG_CCCV_CV_4150MV:
703 info->cv = CV_4150MV;
705 case CHRG_CCCV_CV_4200MV:
706 info->cv = CV_4200MV;
708 case CHRG_CCCV_CV_4350MV:
709 info->cv = CV_4350MV;
713 /* Determine charge current limit */
714 cc = (val & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
715 cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
719 * Do not allow the user to configure higher settings then those
720 * set by the firmware
722 info->max_cv = info->cv;
723 info->max_cc = info->cc;
728 static void axp288_charger_cancel_work(void *data)
730 struct axp288_chrg_info *info = data;
732 cancel_work_sync(&info->otg.work);
733 cancel_work_sync(&info->cable.work);
736 static int axp288_charger_probe(struct platform_device *pdev)
739 struct axp288_chrg_info *info;
740 struct device *dev = &pdev->dev;
741 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
742 struct power_supply_config charger_cfg = {};
746 * On some devices the fuelgauge and charger parts of the axp288 are
747 * not used, check that the fuelgauge is enabled (CC_CTRL != 0).
749 ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val);
755 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
760 info->regmap = axp20x->regmap;
761 info->regmap_irqc = axp20x->regmap_irqc;
763 info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
764 if (info->cable.edev == NULL) {
765 dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
766 AXP288_EXTCON_DEV_NAME);
767 return -EPROBE_DEFER;
770 if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1)) {
771 info->otg.cable = extcon_get_extcon_dev(USB_HOST_EXTCON_NAME);
772 if (info->otg.cable == NULL) {
773 dev_dbg(dev, "EXTCON_USB_HOST is not ready, probe deferred\n");
774 return -EPROBE_DEFER;
777 "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");
780 platform_set_drvdata(pdev, info);
782 ret = charger_init_hw_regs(info);
786 /* Register with power supply class */
787 charger_cfg.drv_data = info;
788 info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc,
790 if (IS_ERR(info->psy_usb)) {
791 ret = PTR_ERR(info->psy_usb);
792 dev_err(dev, "failed to register power supply: %d\n", ret);
796 /* Cancel our work on cleanup, register this before the notifiers */
797 ret = devm_add_action(dev, axp288_charger_cancel_work, info);
801 /* Register for extcon notification */
802 INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
803 info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
804 ret = devm_extcon_register_notifier_all(dev, info->cable.edev,
807 dev_err(dev, "failed to register cable extcon notifier\n");
810 schedule_work(&info->cable.work);
812 /* Register for OTG notification */
813 INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
814 info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
815 if (info->otg.cable) {
816 ret = devm_extcon_register_notifier(&pdev->dev, info->otg.cable,
817 EXTCON_USB_HOST, &info->otg.id_nb);
819 dev_err(dev, "failed to register EXTCON_USB_HOST notifier\n");
822 schedule_work(&info->otg.work);
825 /* Register charger interrupts */
826 for (i = 0; i < CHRG_INTR_END; i++) {
827 pirq = platform_get_irq(info->pdev, i);
829 dev_err(&pdev->dev, "Failed to get IRQ: %d\n", pirq);
832 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
833 if (info->irq[i] < 0) {
834 dev_warn(&info->pdev->dev,
835 "failed to get virtual interrupt=%d\n", pirq);
838 ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
839 NULL, axp288_charger_irq_thread_handler,
840 IRQF_ONESHOT, info->pdev->name, info);
842 dev_err(&pdev->dev, "failed to request interrupt=%d\n",
851 static const struct platform_device_id axp288_charger_id_table[] = {
852 { .name = "axp288_charger" },
855 MODULE_DEVICE_TABLE(platform, axp288_charger_id_table);
857 static struct platform_driver axp288_charger_driver = {
858 .probe = axp288_charger_probe,
859 .id_table = axp288_charger_id_table,
861 .name = "axp288_charger",
865 module_platform_driver(axp288_charger_driver);
867 MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
868 MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
869 MODULE_LICENSE("GPL v2");