diff mbox series

[v3,14/23] power: supply: max77705: Add charger driver for Maxim 77705

Message ID 20240618-starqltechn_integration_upstream-v3-14-e3f6662017ac@gmail.com
State Handled Elsewhere
Headers show
Series This is continued work on Samsung S9(SM-9600) starqltechn | expand

Commit Message

Dzmitry Sankouski June 18, 2024, 1:59 p.m. UTC
Add driver for Maxim 77705 switch-mode charger (part of max77705
MFD driver) providing power supply class information to userspace.

The driver is configured through DTS (battery and system related
settings). Also, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE property
is writable, which allows to configure charge end at less than 100%

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
 drivers/power/supply/Kconfig            |   6 +
 drivers/power/supply/Makefile           |   1 +
 drivers/power/supply/max77705_charger.c | 772 ++++++++++++++++++++++++++++++++
 include/linux/mfd/max77705_charger.h    | 225 ++++++++++
 4 files changed, 1004 insertions(+)

Comments

Krzysztof Kozlowski June 20, 2024, 4:06 p.m. UTC | #1
On 18/06/2024 15:59, Dzmitry Sankouski wrote:
> Add driver for Maxim 77705 switch-mode charger (part of max77705
> MFD driver) providing power supply class information to userspace.
> 
> The driver is configured through DTS (battery and system related
> settings). Also, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE property
> is writable, which allows to configure charge end at less than 100%
> 

...

> + *
> + * Copyright (C) 2015 Samsung Electronics, Inc.
> + *
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.

Yeah, please do not upstream 2015 Samsung code. Instead, take a new,
clean, decent driver and use it as template.

Otherwise you ask us to do exactly the same review we already gave last
10 years. Or review on issues we fixed last 10 years.

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 3e31375491d5..47ca8cc00a80 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -552,6 +552,12 @@  config CHARGER_MAX77693
 	help
 	  Say Y to enable support for the Maxim MAX77693 battery charger.
 
+config CHARGER_MAX77705
+	tristate "Maxim MAX77705 battery charger driver"
+	depends on MFD_MAX77705
+	help
+	  Say Y to enable support for the Maxim MAX77705 battery charger.
+
 config CHARGER_MAX77976
 	tristate "Maxim MAX77976 battery charger driver"
 	depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 58b567278034..dbec648c78c9 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -77,6 +77,7 @@  obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o
 obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
+obj-$(CONFIG_CHARGER_MAX77705)	+= max77705_charger.o
 obj-$(CONFIG_CHARGER_MAX77976)	+= max77976_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply/max77705_charger.c
new file mode 100644
index 000000000000..2b3e836d4c55
--- /dev/null
+++ b/drivers/power/supply/max77705_charger.c
@@ -0,0 +1,772 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * max77705_charger.c - Battery charger driver for the Maxim 77705
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Krzysztof Kozlowski <krzk@kernel.org>
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/debugfs.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/max77705.h>
+#include <linux/mfd/max77705_charger.h>
+#include <linux/mfd/max77705-private.h>
+
+#define MAX77705_CHARGER_NAME				"max77705-charger"
+static const char *max77705_charger_model		= "max77705";
+static const char *max77705_charger_manufacturer	= "Maxim Integrated";
+static struct dentry *debugfs_file;
+
+static enum power_supply_property max77705_charger_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+};
+
+static int max77705_get_online(struct regmap *regmap, int *val)
+{
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &data);
+	if (ret < 0)
+		return ret;
+
+	*val = !!(data & MAX77705_CHGIN_OK);
+
+	return 0;
+}
+
+static int max77705_get_charger_state(struct max77705_charger_data *charger)
+{
+	struct regmap *regmap = charger->max77705->regmap_charger;
+	int status = POWER_SUPPLY_STATUS_UNKNOWN;
+	unsigned int reg_data;
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &reg_data);
+
+	pr_debug("%s: charger status (0x%02x)\n", __func__, reg_data);
+
+	reg_data &= 0x0f;
+
+	switch (reg_data) {
+	case 0x0:
+	case MAX77705_CHARGER_CONSTANT_CURRENT:
+	case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+		status = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case MAX77705_CHARGER_END_OF_CHARGE:
+	case MAX77705_CHARGER_DONE:
+		status = POWER_SUPPLY_STATUS_FULL;
+		break;
+	case 0x05:
+	case 0x06:
+	case 0x07:
+		status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case 0x08:
+	case 0xA:
+	case 0xB:
+		status = POWER_SUPPLY_STATUS_DISCHARGING;
+		break;
+	default:
+		status = POWER_SUPPLY_STATUS_UNKNOWN;
+		break;
+	}
+
+	return (int)status;
+}
+
+static int max77705_get_battery_health(struct regmap *regmap, int *value)
+{
+	unsigned int bat_dtls;
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &bat_dtls);
+	bat_dtls = ((bat_dtls & MAX77705_BAT_DTLS) >> MAX77705_BAT_DTLS_SHIFT);
+
+	pr_debug("%s: bat_dtls(0x%x)\n", __func__, bat_dtls);
+
+	switch (bat_dtls) {
+	case MAX77705_BATTERY_NOBAT:
+		pr_debug("%s: No battery and the charger is suspended\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_NO_BATTERY;
+		break;
+	case MAX77705_BATTERY_PREQUALIFICATION:
+		pr_debug("%s: battery is okay but its voltage is low(~VPQLB)\n", __func__);
+		break;
+	case MAX77705_BATTERY_DEAD:
+		pr_debug("%s: battery dead\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_DEAD;
+		break;
+	case MAX77705_BATTERY_GOOD:
+	case MAX77705_BATTERY_LOWVOLTAGE:
+		*value = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case MAX77705_BATTERY_OVERVOLTAGE:
+		pr_debug("%s: battery ovp\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		break;
+	default:
+		pr_debug("%s: battery unknown\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		break;
+	}
+
+	return 0;
+}
+
+static int max77705_get_vbus_state(struct regmap *regmap, int *value)
+{
+	int ret;
+	unsigned int charge_dtls;
+
+	ret = regmap_read(regmap, MAX77705_CHG_REG_DETAILS_00, &charge_dtls);
+	if (ret)
+		return ret;
+
+	charge_dtls = ((charge_dtls & MAX77705_CHGIN_DTLS) >>
+			MAX77705_CHGIN_DTLS_SHIFT);
+
+	switch (charge_dtls) {
+	case 0x00:
+		*value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+		break;
+	case 0x01:
+		*value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+		break;
+	case 0x02:
+		*value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		break;
+	case 0x03:
+		*value = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	default:
+		return 0;
+	}
+	return 0;
+}
+
+static int max77705_get_health(struct regmap *regmap, int *value)
+{
+	int ret, is_online = 0;
+
+	ret = max77705_get_online(regmap, &is_online);
+	if (ret)
+		return ret;
+	if (is_online) {
+		ret = max77705_get_vbus_state(regmap, value);
+		if (ret || (*value != POWER_SUPPLY_HEALTH_GOOD))
+			return ret;
+	}
+	ret = max77705_get_battery_health(regmap, value);
+	if (ret)
+		return ret;
+	return ret;
+}
+
+static int max77705_get_input_current(struct max77705_charger_data *charger)
+{
+	unsigned int reg_data;
+	int get_current = 0;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	regmap_read(regmap,
+			  MAX77705_CHG_REG_CNFG_09, &reg_data);
+	/* AND operation for removing the formal 1bit  */
+	reg_data &= MAX77705_CHG_CHGIN_LIM_MASK;
+
+	if (reg_data <= 0x3)
+		get_current = 100;
+	else if (reg_data >= 0x7F)
+		get_current = 3200;
+	else
+		get_current = (reg_data + 0x01) * 25;
+
+	dev_dbg(charger->dev, "reg:(0x%x), charging_current:(%d)\n",
+			reg_data, get_current);
+
+	return get_current;
+}
+
+static void max77705_set_input_current(struct max77705_charger_data *charger,
+					int input_current)
+{
+	int curr_step = 25;
+	u8 set_reg, set_mask, reg_data = 0;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	mutex_lock(&charger->charger_mutex);
+
+
+	set_reg = MAX77705_CHG_REG_CNFG_09;
+	set_mask = MAX77705_CHG_CHGIN_LIM_MASK;
+
+	if (input_current < 100) {
+		reg_data = 0x00;
+		regmap_update_bits(regmap, set_reg, set_mask, reg_data);
+	} else {
+		input_current = (input_current > 3200) ? 3200 : input_current;
+		reg_data = (input_current / curr_step) - 0x01;
+		regmap_update_bits(regmap, set_reg, set_mask, reg_data);
+	}
+
+	mutex_unlock(&charger->charger_mutex);
+	dev_dbg(charger->dev, "REG(0x%02x) DATA(0x%02x), CURRENT(%d)\n",
+		set_reg, reg_data, input_current);
+}
+
+static int max77705_get_float_voltage(struct max77705_charger_data *charger)
+{
+	unsigned int reg_data = 0;
+	int float_voltage;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, &reg_data);
+	reg_data &= 0x3F;
+	float_voltage = reg_data <= 0x04 ? reg_data * 50 + 4000 :
+					(reg_data - 4) * 10 + 4200;
+	dev_dbg(charger->dev, "battery cv reg : 0x%x, float voltage val : %d\n",
+		reg_data, float_voltage);
+
+	return float_voltage;
+}
+
+static void max77705_set_float_voltage(struct max77705_charger_data *charger,
+					int float_voltage)
+{
+	int float_voltage_mv;
+	unsigned int reg_data = 0;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	float_voltage_mv = float_voltage / 1000;
+	reg_data = float_voltage_mv <= 4000 ? 0x0 :
+		float_voltage_mv >= 4500 ? 0x23 :
+		(float_voltage_mv <= 4200) ? (float_voltage_mv - 4000) / 50 :
+		(((float_voltage_mv - 4200) / 10) + 0x04);
+
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_04,
+				CHG_CNFG_04_CHG_CV_PRM_MASK,
+				(reg_data << CHG_CNFG_04_CHG_CV_PRM_SHIFT));
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, &reg_data);
+	dev_dbg(charger->dev, "battery cv voltage 0x%x\n", reg_data);
+}
+
+static bool max77705_check_battery(struct max77705_charger_data *charger)
+{
+	unsigned int reg_data;
+	unsigned int reg_data2;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+
+	regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &reg_data);
+
+	dev_dbg(charger->dev, "CHG_INT_OK(0x%x)\n", reg_data);
+
+	regmap_read(regmap,
+			  MAX77705_CHG_REG_DETAILS_00, &reg_data2);
+
+	dev_dbg(charger->dev, "CHG_DETAILS00(0x%x)\n", reg_data2);
+
+	if ((reg_data & MAX77705_BATP_OK) || !(reg_data2 & MAX77705_BATP_DTLS))
+		return true;
+	else
+		return false;
+}
+
+static int max77705_get_charge_type(struct regmap *regmap,
+					union power_supply_propval *val)
+{
+	unsigned int reg_data;
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &reg_data);
+	reg_data &= 0x0F;
+	switch (reg_data) {
+	case MAX77705_CHARGER_CONSTANT_CURRENT:
+		val->strval = "CC Mode";
+		break;
+	case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+		val->strval = "CV Mode";
+		break;
+	case MAX77705_CHARGER_END_OF_CHARGE:
+		val->strval = "EOC";
+		break;
+	case MAX77705_CHARGER_DONE:
+		val->strval = "DONE";
+		break;
+	default:
+		val->strval = "NONE";
+		break;
+	}
+
+	return 0;
+}
+
+static int max77705_get_charge_current(struct max77705_charger_data *charger)
+{
+	unsigned int reg_data;
+	int get_current = 0;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_02, &reg_data);
+	reg_data &= MAX77705_CHG_CC;
+
+	get_current = reg_data <= 0x2 ? 100 : reg_data * 50;
+
+	dev_dbg(charger->dev, "reg:(0x%x), charging_current:(%d)\n",
+			reg_data, get_current);
+	return get_current;
+}
+
+static void max77705_set_charge_current(struct max77705_charger_data *charger,
+					int fast_charging_current)
+{
+	int curr_step = 50;
+	u8 set_mask, reg_data = 0;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	set_mask = MAX77705_CHG_CC;
+
+	if (fast_charging_current < 100) {
+		regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02, set_mask, 0x00);
+	} else {
+		fast_charging_current =
+			(fast_charging_current > 3150) ? 3150 : fast_charging_current;
+
+		reg_data |= (fast_charging_current / curr_step);
+		regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02, set_mask, reg_data);
+	}
+
+	dev_dbg(charger->dev, "REG(0x%02x) DATA(0x%02x), CURRENT(%d)\n",
+		MAX77705_CHG_REG_CNFG_02,
+		reg_data, fast_charging_current);
+}
+
+static int max77705_chg_set_wdtmr_en(struct max77705_charger_data *charger, bool enable)
+{
+	dev_dbg(charger->dev, "WDT en = %d\n", enable);
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	if (enable) {
+		regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+					CHG_CNFG_00_WDTEN_MASK, CHG_CNFG_00_WDTEN_MASK);
+	} else {
+		regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+					 CHG_CNFG_00_WDTEN_MASK, 0);
+	}
+
+	return 0;
+}
+
+static void max77705_charger_initialize(struct max77705_charger_data *charger)
+{
+	u8 reg_data;
+	struct power_supply_battery_info *info;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	if (power_supply_get_battery_info(charger->psy_chg, &info) < 0)
+		return;
+
+	charger->bat_info = info;
+
+	/* unlock charger setting protect
+	 * slowest LX slope
+	 */
+	reg_data = MAX77705_CHGPROT_MASK | MAX77705_SLOWEST_LX_SLOPE;
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, reg_data,
+						reg_data);
+
+	/*
+	 * fast charge timer disable
+	 * restart threshold disable
+	 * pre-qual charge disable
+	 */
+	reg_data = (MAX77705_FCHGTIME_DISABLE << CHG_CNFG_01_FCHGTIME_SHIFT) |
+			(MAX77705_CHG_RSTRT_DISABLE << CHG_CNFG_01_CHG_RSTRT_SHIFT) |
+			(MAX77705_CHG_PQEN_DISABLE << CHG_CNFG_01_PQEN_SHIFT);
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_01,
+						(CHG_CNFG_01_FCHGTIME_MASK |
+						CHG_CNFG_01_CHG_RSTRT_MASK |
+						CHG_CNFG_01_PQEN_MASK),
+						reg_data);
+
+	/*
+	 * OTG off(UNO on), boost off
+	 */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+				CHG_CNFG_00_OTG_CTRL, 0);
+
+	/*
+	 * charge current 450mA(default)
+	 * otg current limit 900mA
+	 */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02,
+				CHG_CNFG_02_OTG_ILIM_MASK,
+				MAX77705_OTG_ILIM_900 << CHG_CNFG_02_OTG_ILIM_SHIFT);
+
+	/* BAT to SYS OCP 4.80A */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_05,
+				CHG_CNFG_05_REG_B2SOVRC_MASK,
+				MAX77705_B2SOVRC_4_8A << CHG_CNFG_05_REG_B2SOVRC_SHIFT);
+	/*
+	 * top off current 150mA
+	 * top off timer 30min
+	 */
+	reg_data = (MAX77705_TO_ITH_150MA << CHG_CNFG_03_TO_ITH_SHIFT) |
+			(MAX77705_TO_TIME_30M << CHG_CNFG_03_TO_TIME_SHIFT) |
+			(MAX77705_SYS_TRACK_DISABLE << CHG_CNFG_03_SYS_TRACK_DIS_SHIFT);
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_03,
+			   (CHG_CNFG_03_TO_ITH_MASK |
+			   CHG_CNFG_03_TO_TIME_MASK |
+			   CHG_CNFG_03_SYS_TRACK_DIS_MASK), reg_data);
+
+	/*
+	 * cv voltage 4.2V or 4.35V
+	 * MINVSYS 3.6V(default)
+	 */
+	if (info->voltage_max_design_uv < 0) {
+		dev_warn(charger->dev, "missing battery:voltage-max-design-microvolt\n");
+		max77705_set_float_voltage(charger, 4200000);
+	} else {
+		max77705_set_float_voltage(charger, info->voltage_max_design_uv);
+	}
+
+	/* VCHGIN : REG=4.5V, UVLO=4.7V, WCHGIN : REG=4.5V, UVLO=4.7V */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
+				CHG_CNFG_12_VCHGIN_REG_MASK | CHG_CNFG_12_WCIN_REG_MASK, 0);
+
+	/* Boost mode possible in FACTORY MODE */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_07,
+				CHG_CNFG_07_REG_FMBST_MASK, MAX77705_CHG_FMBST);
+
+	/* Watchdog timer */
+	max77705_chg_set_wdtmr_en(charger, 0);
+
+	/* Active Discharge Enable */
+	regmap_update_bits(regmap, MAX77705_PMIC_REG_MAINCTRL1, 1, 1);
+
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_09, MAX77705_CHG_EN, MAX77705_CHG_EN);
+
+	/* VBYPSET=5.0V */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_11, CHG_CNFG_11_VBYPSET_MASK, 0);
+
+	/* Switching Frequency : 1.5MHz */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_08, CHG_CNFG_08_REG_FSW_MASK,
+				(MAX77705_CHG_FSW_1_5MHz << CHG_CNFG_08_REG_FSW_SHIFT));
+
+	/* Auto skip mode */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, CHG_CNFG_12_REG_DISKIP_MASK,
+				(MAX77705_AUTO_SKIP << CHG_CNFG_12_REG_DISKIP_SHIFT));
+}
+
+static bool max77705_charger_unlock(struct max77705_charger_data *charger)
+{
+	unsigned int reg_data;
+	unsigned int chgprot;
+	int retry_cnt = 0;
+	bool need_init = false;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	do {
+		regmap_read(regmap, MAX77705_CHG_REG_CNFG_06,
+				  &reg_data);
+		chgprot = (reg_data & MAX77705_CHGPROT_MASK);
+		if (chgprot != MAX77705_CHGPROT_UNLOCKED) {
+			dev_err(charger->dev, "unlock err, chgprot(0x%x), retry(%d)\n",
+					chgprot, retry_cnt);
+			regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06,
+						MAX77705_CHGPROT_MASK, MAX77705_CHGPROT_MASK);
+			need_init = true;
+			msleep(20);
+		} else
+			break;
+	} while ((chgprot != MAX77705_CHGPROT_UNLOCKED) && (++retry_cnt < 10));
+
+	return need_init;
+}
+
+static int max77705_prop_writeable(struct power_supply *psy,
+					  enum power_supply_property psp)
+{
+	return (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT) ||
+		(psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN) ||
+		(psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
+		(psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
+}
+
+static int max77705_chg_set_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					const union power_supply_propval *val)
+{
+	struct max77705_charger_data *charger = power_supply_get_drvdata(psy);
+
+	/* check unlock status before does set the register */
+	max77705_charger_unlock(charger);
+	switch (psp) {
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		max77705_set_input_current(charger, val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		max77705_set_charge_current(charger, val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		if (val->intval > charger->bat_info->voltage_max_design_uv) {
+			dev_err(charger->dev, "%d voltage higher than max",
+				val->intval);
+			return -EINVAL;
+		}
+		max77705_set_float_voltage(charger, val->intval);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int max77705_chg_get_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					union power_supply_propval *val)
+{
+	int ret = 0;
+	struct max77705_charger_data *charger = power_supply_get_drvdata(psy);
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		max77705_get_online(regmap, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = max77705_check_battery(charger);
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = max77705_get_charger_state(charger);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = max77705_get_health(regmap, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		val->intval = max77705_get_input_current(charger);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		val->intval = max77705_get_charge_current(charger);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		val->intval = max77705_get_float_voltage(charger);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		val->intval = charger->bat_info->voltage_max_design_uv;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		ret = max77705_get_charge_type(regmap, val);
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = max77705_charger_model;
+		break;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = max77705_charger_manufacturer;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return ret;
+}
+
+static void max77705_chgin_isr_work(struct work_struct *work)
+{
+	struct max77705_charger_data *charger =
+		container_of(work, struct max77705_charger_data, chgin_work);
+	regmap_update_bits(charger->max77705->regmap_charger,
+						MAX77705_CHG_REG_INT_MASK,
+						MAX77705_CHGIN_IM, MAX77705_CHGIN_IM);
+	power_supply_changed(charger->psy_chg);
+	regmap_update_bits(charger->max77705->regmap_charger,
+						MAX77705_CHG_REG_INT_MASK,
+						MAX77705_CHGIN_IM, 0);
+}
+
+static irqreturn_t max77705_chgin_irq(int irq, void *data)
+{
+	struct max77705_charger_data *charger = data;
+
+	queue_work(charger->wqueue, &charger->chgin_work);
+
+	return IRQ_HANDLED;
+}
+
+static int max77705_debugfs_show(struct seq_file *s, void *data)
+{
+	struct max77705_charger_data *charger = s->private;
+	struct regmap *regmap = charger->max77705->regmap_charger;
+	unsigned int reg, reg_data;
+
+	seq_printf(s, "MAX77705 CHARGER IC, ver.0x%x\n", charger->pmic_ver);
+	seq_puts(s, "===================\n");
+	for (reg = 0xB0; reg <= 0xC3; reg++) {
+		regmap_read(regmap, reg, &reg_data);
+		seq_printf(s, "0x%02x:\t0x%02x\n", reg, reg_data);
+	}
+
+	seq_puts(s, "\n");
+	return 0;
+}
+
+static int max77705_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, max77705_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations max77705_debugfs_fops = {
+	.open = max77705_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static const struct power_supply_desc max77705_charger_power_supply_desc = {
+	.name = MAX77705_CHARGER_NAME,
+	.type		= POWER_SUPPLY_TYPE_BATTERY,
+	.properties = max77705_charger_props,
+	.num_properties = ARRAY_SIZE(max77705_charger_props),
+	.get_property = max77705_chg_get_property,
+	.set_property = max77705_chg_set_property,
+	.property_is_writeable = max77705_prop_writeable,
+};
+
+static int max77705_charger_probe(struct platform_device *pdev)
+{
+	struct max77705_dev *max77705 = dev_get_drvdata(pdev->dev.parent);
+	struct max77705_platform_data *pdata = dev_get_platdata(max77705->dev);
+	struct max77705_charger_data *charger;
+	struct regmap *regmap = max77705->regmap_charger;
+	struct power_supply_config charger_cfg = { };
+	int ret = 0;
+	unsigned int reg_data;
+
+	charger = kzalloc(sizeof(*charger), GFP_KERNEL);
+	if (!charger)
+		return -ENOMEM;
+
+	mutex_init(&charger->charger_mutex);
+
+	charger->dev = &pdev->dev;
+	charger->max77705 = max77705;
+	charger->max77705_pdata = pdata;
+
+	platform_set_drvdata(pdev, charger);
+
+	regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &reg_data);
+
+	if (regmap_read
+		(max77705->regmap, MAX77705_PMIC_REG_PMICREV, &reg_data) < 0) {
+		dev_err(charger->dev,
+			"device not found on this channel (this is not an error)\n");
+		ret = -ENOMEM;
+	} else {
+		charger->pmic_ver = (reg_data & 0x7);
+		dev_dbg(charger->dev, "device found : ver.0x%x\n", charger->pmic_ver);
+	}
+
+	debugfs_file = debugfs_create_file("max77705-charger-regs",
+				0664, NULL, (void *)charger,
+				  &max77705_debugfs_fops);
+	if (!debugfs_file)
+		dev_err(charger->dev, "Failed to create debugfs file\n");
+
+	charger_cfg.drv_data = charger;
+	charger_cfg.of_node = charger->dev->of_node;
+
+	charger->psy_chg =
+		devm_power_supply_register(&pdev->dev,
+				  &max77705_charger_power_supply_desc,
+				  &charger_cfg);
+	if (IS_ERR(charger->psy_chg)) {
+		dev_err(charger->dev, "Failed to Register psy_chg\n");
+		goto err_free;
+	}
+
+	max77705_charger_initialize(charger);
+
+	charger->wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
+	if (!charger->wqueue) {
+		pr_err("%s: Fail to Create Workqueue\n", __func__);
+		goto err_free;
+	}
+	INIT_WORK(&charger->chgin_work, max77705_chgin_isr_work);
+
+	charger->irq_chgin = max77705->irq_base + MAX77705_CHG_IRQ_CHGIN_I;
+	ret = devm_request_threaded_irq(charger->dev, charger->irq_chgin, NULL,
+					max77705_chgin_irq, 0, "chgin-irq", charger);
+	if (ret < 0) {
+		pr_err("%s: fail to request chgin IRQ: %d: %d\n",
+				__func__, charger->irq_chgin, ret);
+	} else {
+		max77705_irq_unmask_subdevice(max77705, MAX77705_IRQSRC_CHG);
+	}
+
+	return 0;
+
+err_free:
+	kfree(charger);
+
+	return ret;
+}
+
+static void max77705_charger_remove(struct platform_device *pdev)
+{
+	struct max77705_charger_data *charger = platform_get_drvdata(pdev);
+	struct regmap *regmap = charger->max77705->regmap_charger;
+
+	max77705_irq_mask_subdevice(charger->max77705, MAX77705_IRQSRC_CHG);
+
+	if (regmap) {
+		u8 reg_data;
+
+		reg_data = CHG_CNFG_00_BUCK_MASK;
+		regmap_write(regmap, MAX77705_CHG_REG_CNFG_00, reg_data);
+		reg_data = max77705_convert_ma_to_chgin_ilim_value(500);
+		regmap_write(regmap, MAX77705_CHG_REG_CNFG_09, reg_data);
+		reg_data = max77705_convert_ma_to_wcin_ilim_value(320);
+		regmap_write(regmap, MAX77705_CHG_REG_CNFG_10, reg_data);
+		reg_data = CHG_CNFG_12_CHGINSEL_MASK | CHG_CNFG_12_WCINSEL_MASK;
+		regmap_write(regmap, MAX77705_CHG_REG_CNFG_12, reg_data);
+	} else {
+		dev_err(charger->dev, "no max77705 i2c client\n");
+	}
+
+	if (debugfs_file)
+		debugfs_remove(debugfs_file);
+
+	kfree(charger);
+}
+
+static const struct platform_device_id max77705_charger_id[] = {
+	{ "max77705-charger", 0, },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, max77705_charger_id);
+
+static struct platform_driver max77705_charger_driver = {
+	.driver = {
+		.name = "max77705-charger",
+	},
+	.probe = max77705_charger_probe,
+	.remove_new = max77705_charger_remove,
+	.id_table	= max77705_charger_id,
+};
+module_platform_driver(max77705_charger_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_DESCRIPTION("Maxim 77705 charger driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77705_charger.h b/include/linux/mfd/max77705_charger.h
new file mode 100644
index 000000000000..816bb63d9583
--- /dev/null
+++ b/include/linux/mfd/max77705_charger.h
@@ -0,0 +1,225 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * max77705_charger.h
+ * Samsung max77705 Charger Header
+ *
+ * Copyright (C) 2015 Samsung Electronics, Inc.
+ *
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __MAX77705_CHARGER_H
+#define __MAX77705_CHARGER_H __FILE__
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77705.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/regulator/machine.h>
+
+/* MAX77705_CHG_REG_CHG_INT */
+#define MAX77705_BYP_I                  BIT(0)
+#define MAX77705_INP_LIMIT_I		BIT(1)
+#define MAX77705_BATP_I                 BIT(2)
+#define MAX77705_BAT_I                  BIT(3)
+#define MAX77705_CHG_I                  BIT(4)
+#define MAX77705_WCIN_I                 BIT(5)
+#define MAX77705_CHGIN_I                BIT(6)
+#define MAX77705_AICL_I                 BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_MASK */
+#define MAX77705_BYP_IM                 BIT(0)
+#define MAX77705_INP_LIMIT_IM		BIT(1)
+#define MAX77705_BATP_IM                BIT(2)
+#define MAX77705_BAT_IM                 BIT(3)
+#define MAX77705_CHG_IM                 BIT(4)
+#define MAX77705_WCIN_IM                BIT(5)
+#define MAX77705_CHGIN_IM               BIT(6)
+#define MAX77705_AICL_IM                BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_OK */
+#define MAX77705_BYP_OK                 BIT(0)
+#define MAX77705_DISQBAT_OK		BIT(1)
+#define MAX77705_BATP_OK		BIT(2)
+#define MAX77705_BAT_OK                 BIT(3)
+#define MAX77705_CHG_OK                 BIT(4)
+#define MAX77705_WCIN_OK		BIT(5)
+#define MAX77705_CHGIN_OK               BIT(6)
+#define MAX77705_AICL_OK                BIT(7)
+
+/* MAX77705_CHG_REG_CHG_DTLS_00 */
+#define MAX77705_BATP_DTLS		BIT(0)
+#define MAX77705_WCIN_DTLS		(BIT(3) | BIT(4))
+#define MAX77705_WCIN_DTLS_SHIFT	3
+#define MAX77705_CHGIN_DTLS             (BIT(5) | BIT(6))
+#define MAX77705_CHGIN_DTLS_SHIFT       5
+
+/* MAX77705_CHG_REG_CHG_DTLS_01 */
+#define MAX77705_CHG_DTLS               (BIT(0) | BIT(1) | BIT(2) | BIT(3))
+#define MAX77705_CHG_DTLS_SHIFT         0
+#define MAX77705_BAT_DTLS               (BIT(4) | BIT(5) | BIT(6))
+#define MAX77705_BAT_DTLS_SHIFT         4
+
+/* MAX77705_CHG_REG_CHG_DTLS_02 */
+#define MAX77705_BYP_DTLS               (BIT(0) | BIT(1) | BIT(2) | BIT(3))
+#define MAX77705_BYP_DTLS_SHIFT         0
+
+/* MAX77705_CHG_REG_CHG_CNFG_00 */
+#define CHG_CNFG_00_MODE_SHIFT		        0
+#define CHG_CNFG_00_CHG_SHIFT		        0
+#define CHG_CNFG_00_UNO_SHIFT		        1
+#define CHG_CNFG_00_OTG_SHIFT		        1
+#define CHG_CNFG_00_BUCK_SHIFT		        2
+#define CHG_CNFG_00_BOOST_SHIFT		        3
+#define CHG_CNFG_00_WDTEN_SHIFT		        4
+#define CHG_CNFG_00_MODE_MASK		        (0x0F << CHG_CNFG_00_MODE_SHIFT)
+#define CHG_CNFG_00_CHG_MASK		        BIT(CHG_CNFG_00_CHG_SHIFT)
+#define CHG_CNFG_00_UNO_MASK		        BIT(CHG_CNFG_00_UNO_SHIFT)
+#define CHG_CNFG_00_OTG_MASK		        BIT(CHG_CNFG_00_OTG_SHIFT)
+#define CHG_CNFG_00_BUCK_MASK		        BIT(CHG_CNFG_00_BUCK_SHIFT)
+#define CHG_CNFG_00_BOOST_MASK		        BIT(CHG_CNFG_00_BOOST_SHIFT)
+#define CHG_CNFG_00_WDTEN_MASK		        BIT(CHG_CNFG_00_WDTEN_SHIFT)
+#define CHG_CNFG_00_UNO_CTRL			(CHG_CNFG_00_UNO_MASK | CHG_CNFG_00_BOOST_MASK)
+#define CHG_CNFG_00_OTG_CTRL			(CHG_CNFG_00_OTG_MASK | CHG_CNFG_00_BOOST_MASK)
+
+/* MAX77705_CHG_REG_CHG_CNFG_01 */
+#define CHG_CNFG_01_FCHGTIME_SHIFT			0
+#define CHG_CNFG_01_FCHGTIME_MASK			(0x7 << CHG_CNFG_01_FCHGTIME_SHIFT)
+#define MAX77705_FCHGTIME_DISABLE			0x0
+
+#define CHG_CNFG_01_CHG_RSTRT_SHIFT	4
+#define CHG_CNFG_01_CHG_RSTRT_MASK	(0x3 << CHG_CNFG_01_CHG_RSTRT_SHIFT)
+#define MAX77705_CHG_RSTRT_DISABLE	0x3
+
+#define CHG_CNFG_01_PQEN_SHIFT			7
+#define CHG_CNFG_01_PQEN_MASK			(0x1 << CHG_CNFG_01_PQEN_SHIFT)
+#define MAX77705_CHG_PQEN_DISABLE		0x0
+#define MAX77705_CHG_PQEN_ENABLE		0x1
+
+/* MAX77705_CHG_REG_CHG_CNFG_02 */
+#define CHG_CNFG_02_OTG_ILIM_SHIFT		6
+#define CHG_CNFG_02_OTG_ILIM_MASK		(0x3 << CHG_CNFG_02_OTG_ILIM_SHIFT)
+#define MAX77705_OTG_ILIM_500		0x0
+#define MAX77705_OTG_ILIM_900		0x1
+#define MAX77705_OTG_ILIM_1200		0x2
+#define MAX77705_OTG_ILIM_1500		0x3
+#define MAX77705_CHG_CC                         0x3F
+
+/* MAX77705_CHG_REG_CHG_CNFG_03 */
+#define CHG_CNFG_03_TO_ITH_SHIFT		0
+#define CHG_CNFG_03_TO_ITH_MASK			(0x7 << CHG_CNFG_03_TO_ITH_SHIFT)
+#define MAX77705_TO_ITH_150MA			0x0
+
+#define CHG_CNFG_03_TO_TIME_SHIFT		3
+#define CHG_CNFG_03_TO_TIME_MASK			(0x7 << CHG_CNFG_03_TO_TIME_SHIFT)
+#define MAX77705_TO_TIME_30M			0x3
+
+#define CHG_CNFG_03_SYS_TRACK_DIS_SHIFT		7
+#define CHG_CNFG_03_SYS_TRACK_DIS_MASK		(0x1 << CHG_CNFG_03_SYS_TRACK_DIS_SHIFT)
+#define MAX77705_SYS_TRACK_ENABLE	        0x0
+#define MAX77705_SYS_TRACK_DISABLE	        0x1
+
+/* MAX77705_CHG_REG_CHG_CNFG_04 */
+#define MAX77705_CHG_MINVSYS_MASK               0xC0
+#define MAX77705_CHG_MINVSYS_SHIFT		6
+#define MAX77705_CHG_PRM_MASK                   0x1F
+#define MAX77705_CHG_PRM_SHIFT                  0
+
+#define CHG_CNFG_04_CHG_CV_PRM_SHIFT            0
+#define CHG_CNFG_04_CHG_CV_PRM_MASK             (0x3F << CHG_CNFG_04_CHG_CV_PRM_SHIFT)
+
+/* MAX77705_CHG_REG_CHG_CNFG_05 */
+#define CHG_CNFG_05_REG_B2SOVRC_SHIFT	0
+#define CHG_CNFG_05_REG_B2SOVRC_MASK	(0xF << CHG_CNFG_05_REG_B2SOVRC_SHIFT)
+#define MAX77705_B2SOVRC_DISABLE	0x0
+#define MAX77705_B2SOVRC_4_5A		0x6
+#define MAX77705_B2SOVRC_4_8A		0x8
+#define MAX77705_B2SOVRC_5_0A		0x9
+
+/* MAX77705_CHG_CNFG_06 */
+#define CHG_CNFG_01_WDTCLR_SHIFT		0
+#define CHG_CNFG_01_WDTCLR_MASK			(0x3 << CHG_CNFG_01_WDTCLR_SHIFT)
+#define MAX77705_WDTCLR				0x01
+#define MAX77705_CHGPROT_MASK	(BIT(2) | BIT(3))
+#define MAX77705_CHGPROT_UNLOCKED	(BIT(2) | BIT(3))
+#define MAX77705_SLOWEST_LX_SLOPE	(BIT(5) | BIT(6))
+
+/* MAX77705_CHG_REG_CHG_CNFG_07 */
+#define MAX77705_CHG_FMBST			0x04
+#define CHG_CNFG_07_REG_FMBST_SHIFT		2
+#define CHG_CNFG_07_REG_FMBST_MASK		(0x1 << CHG_CNFG_07_REG_FMBST_SHIFT)
+#define CHG_CNFG_07_REG_FGSRC_SHIFT		1
+#define CHG_CNFG_07_REG_FGSRC_MASK		(0x1 << CHG_CNFG_07_REG_FGSRC_SHIFT)
+
+/* MAX77705_CHG_REG_CHG_CNFG_08 */
+#define CHG_CNFG_08_REG_FSW_SHIFT	0
+#define CHG_CNFG_08_REG_FSW_MASK	(0x3 << CHG_CNFG_08_REG_FSW_SHIFT)
+#define MAX77705_CHG_FSW_3MHz		0x00
+#define MAX77705_CHG_FSW_2MHz		0x01
+#define MAX77705_CHG_FSW_1_5MHz		0x02
+
+/* MAX77705_CHG_REG_CHG_CNFG_09 */
+#define MAX77705_CHG_CHGIN_LIM_MASK     0x7F
+#define MAX77705_CHG_EN                         0x80
+
+/* MAX77705_CHG_REG_CHG_CNFG_10 */
+#define MAX77705_CHG_WCIN_LIM                   0x3F
+
+/* MAX77705_CHG_REG_CHG_CNFG_11 */
+#define CHG_CNFG_11_VBYPSET_SHIFT		0
+#define CHG_CNFG_11_VBYPSET_MASK		(0x7F << CHG_CNFG_11_VBYPSET_SHIFT)
+
+/* MAX77705_CHG_REG_CHG_CNFG_12 */
+#define CHG_CNFG_12_CHGINSEL_SHIFT		5
+#define MAX77705_CHG_WCINSEL			BIT(CHG_CNFG_12_CHGINSEL_SHIFT)
+#define CHG_CNFG_12_CHGINSEL_MASK		BIT(CHG_CNFG_12_CHGINSEL_SHIFT)
+#define CHG_CNFG_12_WCINSEL_SHIFT		6
+#define CHG_CNFG_12_WCINSEL_MASK		BIT(CHG_CNFG_12_WCINSEL_SHIFT)
+#define CHG_CNFG_12_VCHGIN_REG_MASK		(0x3 << 3)
+#define CHG_CNFG_12_WCIN_REG_MASK		(0x3 << 1)
+#define CHG_CNFG_12_REG_DISKIP_SHIFT		0
+#define CHG_CNFG_12_REG_DISKIP_MASK		(0x1 << CHG_CNFG_12_REG_DISKIP_SHIFT)
+#define MAX77705_DISABLE_SKIP			0x1
+#define MAX77705_AUTO_SKIP			0x0
+
+/* Convert current in mA to corresponding CNFG09 value */
+inline u8 max77705_convert_ma_to_chgin_ilim_value(int cur)
+{
+	if (unlikely(cur < 0 && cur > 4000))
+		return 0;
+	return (((cur - 100) / 33) + 3);
+}
+
+/* Convert current in mA to corresponding CNFG10 value */
+inline u8 max77705_convert_ma_to_wcin_ilim_value(int cur)
+{
+	if (unlikely(cur < 0 && cur > 4000))
+		return 0;
+	return (((cur - 60) / 20) + 3);
+}
+
+struct max77705_charger_data {
+	struct device           *dev;
+	struct mutex            charger_mutex;
+
+	struct max77705_platform_data *max77705_pdata;
+	struct max77705_dev	*max77705;
+	struct power_supply_battery_info *bat_info;
+	struct workqueue_struct *wqueue;
+	struct work_struct	chgin_work;
+	int		irq_chgin;
+
+	struct power_supply	*psy_chg;
+
+	int pmic_ver;
+};
+
+#endif /* __MAX77705_CHARGER_H */