Merge tag 'for-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
 - move power supply drivers to drivers/power/supply
 - unify location of power supply DT documentation
 - tps65217-charger: IRQ support
 - act8945a-charger: misc. cleanups & improvements
 - sbs-battery cleanup
 - fix users of deprecated create_singlethread_workqueue()
 - misc fixes.

* tag 'for-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (46 commits)
  power: supply: bq27xxx_battery: allow kernel poll_interval parameter runtime update
  power: supply: sbs-battery: Cleanup removal of chip->pdata
  power: reset: st: Remove obsolete platforms from dt doc
  power: reset: st-poweroff: Remove obsolete platforms.
  power: reset: zx-reboot: Unmap region obtained by of_iomap
  power: reset: xgene-reboot: Unmap region obtained by of_iomap
  power: supply: ab8500: cleanup with list_first_entry_or_null()
  power: reset: add in missing white space in error message text
  sbs-battery: make writes to ManufacturerAccess optional
  power: bq24257: Fix use of uninitialized pointer bq->charger
  power: supply: sbs-battery: simplify DT parsing
  power: supply: bq24735-charger: Request status GPIO with initial input setup
  power: supply: sbs-battery: Use gpio_desc and sleeping calls for battery detect
  power: supply: act8945a_charger: Add max current property
  power: supply: act8945a_charger: Add capacity level property
  doc: bindings: power: act8945a-charger: Update properties.
  power: supply: act8945a_charger: Fix the power supply type
  power: supply: act8945a_charger: Add status change update support
  power: supply: act8945a_charger: Improve state handling
  power: supply: act8945a_charger: Remove "battery_temperature"
  ...

1 files changed, 3765 insertions, 0 deletions

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
new file mode 100644
index 000000000000..5cee9aa87aa3
--- /dev/null
+++ b/drivers/power/supply/ab8500_charger.c
@@ -0,0 +1,3765 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2012
+ *
+ * Charger driver for AB8500
+ *
+ * License Terms: GNU General Public License v2
+ * Author:
+ *	Johan Palsson <johan.palsson@stericsson.com>
+ *	Karl Komierowski <karl.komierowski@stericsson.com>
+ *	Arun R Murthy <arun.murthy@stericsson.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/notifier.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/completion.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/workqueue.h>
+#include <linux/kobject.h>
+#include <linux/of.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500-bm.h>
+#include <linux/mfd/abx500/ab8500-gpadc.h>
+#include <linux/mfd/abx500/ux500_chargalg.h>
+#include <linux/usb/otg.h>
+#include <linux/mutex.h>
+
+/* Charger constants */
+#define NO_PW_CONN			0
+#define AC_PW_CONN			1
+#define USB_PW_CONN			2
+
+#define MAIN_WDOG_ENA			0x01
+#define MAIN_WDOG_KICK			0x02
+#define MAIN_WDOG_DIS			0x00
+#define CHARG_WD_KICK			0x01
+#define MAIN_CH_ENA			0x01
+#define MAIN_CH_NO_OVERSHOOT_ENA_N	0x02
+#define USB_CH_ENA			0x01
+#define USB_CHG_NO_OVERSHOOT_ENA_N	0x02
+#define MAIN_CH_DET			0x01
+#define MAIN_CH_CV_ON			0x04
+#define USB_CH_CV_ON			0x08
+#define VBUS_DET_DBNC100		0x02
+#define VBUS_DET_DBNC1			0x01
+#define OTP_ENABLE_WD			0x01
+#define DROP_COUNT_RESET		0x01
+#define USB_CH_DET			0x01
+
+#define MAIN_CH_INPUT_CURR_SHIFT	4
+#define VBUS_IN_CURR_LIM_SHIFT		4
+#define AB8540_VBUS_IN_CURR_LIM_SHIFT	2
+#define AUTO_VBUS_IN_CURR_LIM_SHIFT	4
+#define AB8540_AUTO_VBUS_IN_CURR_MASK	0x3F
+#define VBUS_IN_CURR_LIM_RETRY_SET_TIME	30 /* seconds */
+
+#define LED_INDICATOR_PWM_ENA		0x01
+#define LED_INDICATOR_PWM_DIS		0x00
+#define LED_IND_CUR_5MA			0x04
+#define LED_INDICATOR_PWM_DUTY_252_256	0xBF
+
+/* HW failure constants */
+#define MAIN_CH_TH_PROT			0x02
+#define VBUS_CH_NOK			0x08
+#define USB_CH_TH_PROT			0x02
+#define VBUS_OVV_TH			0x01
+#define MAIN_CH_NOK			0x01
+#define VBUS_DET			0x80
+
+#define MAIN_CH_STATUS2_MAINCHGDROP		0x80
+#define MAIN_CH_STATUS2_MAINCHARGERDETDBNC	0x40
+#define USB_CH_VBUSDROP				0x40
+#define USB_CH_VBUSDETDBNC			0x01
+
+/* UsbLineStatus register bit masks */
+#define AB8500_USB_LINK_STATUS		0x78
+#define AB8505_USB_LINK_STATUS		0xF8
+#define AB8500_STD_HOST_SUSP		0x18
+#define USB_LINK_STATUS_SHIFT		3
+
+/* Watchdog timeout constant */
+#define WD_TIMER			0x30 /* 4min */
+#define WD_KICK_INTERVAL		(60 * HZ)
+
+/* Lowest charger voltage is 3.39V -> 0x4E */
+#define LOW_VOLT_REG			0x4E
+
+/* Step up/down delay in us */
+#define STEP_UDELAY			1000
+
+#define CHARGER_STATUS_POLL 10 /* in ms */
+
+#define CHG_WD_INTERVAL			(60 * HZ)
+
+#define AB8500_SW_CONTROL_FALLBACK	0x03
+/* Wait for enumeration before charing in us */
+#define WAIT_ACA_RID_ENUMERATION	(5 * 1000)
+/*External charger control*/
+#define AB8500_SYS_CHARGER_CONTROL_REG		0x52
+#define EXTERNAL_CHARGER_DISABLE_REG_VAL	0x03
+#define EXTERNAL_CHARGER_ENABLE_REG_VAL		0x07
+
+/* UsbLineStatus register - usb types */
+enum ab8500_charger_link_status {
+	USB_STAT_NOT_CONFIGURED,
+	USB_STAT_STD_HOST_NC,
+	USB_STAT_STD_HOST_C_NS,
+	USB_STAT_STD_HOST_C_S,
+	USB_STAT_HOST_CHG_NM,
+	USB_STAT_HOST_CHG_HS,
+	USB_STAT_HOST_CHG_HS_CHIRP,
+	USB_STAT_DEDICATED_CHG,
+	USB_STAT_ACA_RID_A,
+	USB_STAT_ACA_RID_B,
+	USB_STAT_ACA_RID_C_NM,
+	USB_STAT_ACA_RID_C_HS,
+	USB_STAT_ACA_RID_C_HS_CHIRP,
+	USB_STAT_HM_IDGND,
+	USB_STAT_RESERVED,
+	USB_STAT_NOT_VALID_LINK,
+	USB_STAT_PHY_EN,
+	USB_STAT_SUP_NO_IDGND_VBUS,
+	USB_STAT_SUP_IDGND_VBUS,
+	USB_STAT_CHARGER_LINE_1,
+	USB_STAT_CARKIT_1,
+	USB_STAT_CARKIT_2,
+	USB_STAT_ACA_DOCK_CHARGER,
+};
+
+enum ab8500_usb_state {
+	AB8500_BM_USB_STATE_RESET_HS,	/* HighSpeed Reset */
+	AB8500_BM_USB_STATE_RESET_FS,	/* FullSpeed/LowSpeed Reset */
+	AB8500_BM_USB_STATE_CONFIGURED,
+	AB8500_BM_USB_STATE_SUSPEND,
+	AB8500_BM_USB_STATE_RESUME,
+	AB8500_BM_USB_STATE_MAX,
+};
+
+/* VBUS input current limits supported in AB8500 in mA */
+#define USB_CH_IP_CUR_LVL_0P05		50
+#define USB_CH_IP_CUR_LVL_0P09		98
+#define USB_CH_IP_CUR_LVL_0P19		193
+#define USB_CH_IP_CUR_LVL_0P29		290
+#define USB_CH_IP_CUR_LVL_0P38		380
+#define USB_CH_IP_CUR_LVL_0P45		450
+#define USB_CH_IP_CUR_LVL_0P5		500
+#define USB_CH_IP_CUR_LVL_0P6		600
+#define USB_CH_IP_CUR_LVL_0P7		700
+#define USB_CH_IP_CUR_LVL_0P8		800
+#define USB_CH_IP_CUR_LVL_0P9		900
+#define USB_CH_IP_CUR_LVL_1P0		1000
+#define USB_CH_IP_CUR_LVL_1P1		1100
+#define USB_CH_IP_CUR_LVL_1P3		1300
+#define USB_CH_IP_CUR_LVL_1P4		1400
+#define USB_CH_IP_CUR_LVL_1P5		1500
+
+#define VBAT_TRESH_IP_CUR_RED		3800
+
+#define to_ab8500_charger_usb_device_info(x) container_of((x), \
+	struct ab8500_charger, usb_chg)
+#define to_ab8500_charger_ac_device_info(x) container_of((x), \
+	struct ab8500_charger, ac_chg)
+
+/**
+ * struct ab8500_charger_interrupts - ab8500 interupts
+ * @name:	name of the interrupt
+ * @isr		function pointer to the isr
+ */
+struct ab8500_charger_interrupts {
+	char *name;
+	irqreturn_t (*isr)(int irq, void *data);
+};
+
+struct ab8500_charger_info {
+	int charger_connected;
+	int charger_online;
+	int charger_voltage;
+	int cv_active;
+	bool wd_expired;
+	int charger_current;
+};
+
+struct ab8500_charger_event_flags {
+	bool mainextchnotok;
+	bool main_thermal_prot;
+	bool usb_thermal_prot;
+	bool vbus_ovv;
+	bool usbchargernotok;
+	bool chgwdexp;
+	bool vbus_collapse;
+	bool vbus_drop_end;
+};
+
+struct ab8500_charger_usb_state {
+	int usb_current;
+	int usb_current_tmp;
+	enum ab8500_usb_state state;
+	enum ab8500_usb_state state_tmp;
+	spinlock_t usb_lock;
+};
+
+struct ab8500_charger_max_usb_in_curr {
+	int usb_type_max;
+	int set_max;
+	int calculated_max;
+};
+
+/**
+ * struct ab8500_charger - ab8500 Charger device information
+ * @dev:		Pointer to the structure device
+ * @vbus_detected:	VBUS detected
+ * @vbus_detected_start:
+ *			VBUS detected during startup
+ * @ac_conn:		This will be true when the AC charger has been plugged
+ * @vddadc_en_ac:	Indicate if VDD ADC supply is enabled because AC
+ *			charger is enabled
+ * @vddadc_en_usb:	Indicate if VDD ADC supply is enabled because USB
+ *			charger is enabled
+ * @vbat		Battery voltage
+ * @old_vbat		Previously measured battery voltage
+ * @usb_device_is_unrecognised	USB device is unrecognised by the hardware
+ * @autopower		Indicate if we should have automatic pwron after pwrloss
+ * @autopower_cfg	platform specific power config support for "pwron after pwrloss"
+ * @invalid_charger_detect_state State when forcing AB to use invalid charger
+ * @is_aca_rid:		Incicate if accessory is ACA type
+ * @current_stepping_sessions:
+ *			Counter for current stepping sessions
+ * @parent:		Pointer to the struct ab8500
+ * @gpadc:		Pointer to the struct gpadc
+ * @bm:           	Platform specific battery management information
+ * @flags:		Structure for information about events triggered
+ * @usb_state:		Structure for usb stack information
+ * @max_usb_in_curr:	Max USB charger input current
+ * @ac_chg:		AC charger power supply
+ * @usb_chg:		USB charger power supply
+ * @ac:			Structure that holds the AC charger properties
+ * @usb:		Structure that holds the USB charger properties
+ * @regu:		Pointer to the struct regulator
+ * @charger_wq:		Work queue for the IRQs and checking HW state
+ * @usb_ipt_crnt_lock:	Lock to protect VBUS input current setting from mutuals
+ * @pm_lock:		Lock to prevent system to suspend
+ * @check_vbat_work	Work for checking vbat threshold to adjust vbus current
+ * @check_hw_failure_work:	Work for checking HW state
+ * @check_usbchgnotok_work:	Work for checking USB charger not ok status
+ * @kick_wd_work:		Work for kicking the charger watchdog in case
+ *				of ABB rev 1.* due to the watchog logic bug
+ * @ac_charger_attached_work:	Work for checking if AC charger is still
+ *				connected
+ * @usb_charger_attached_work:	Work for checking if USB charger is still
+ *				connected
+ * @ac_work:			Work for checking AC charger connection
+ * @detect_usb_type_work:	Work for detecting the USB type connected
+ * @usb_link_status_work:	Work for checking the new USB link status
+ * @usb_state_changed_work:	Work for checking USB state
+ * @attach_work:		Work for detecting USB type
+ * @vbus_drop_end_work:		Work for detecting VBUS drop end
+ * @check_main_thermal_prot_work:
+ *				Work for checking Main thermal status
+ * @check_usb_thermal_prot_work:
+ *				Work for checking USB thermal status
+ * @charger_attached_mutex:	For controlling the wakelock
+ */
+struct ab8500_charger {
+	struct device *dev;
+	bool vbus_detected;
+	bool vbus_detected_start;
+	bool ac_conn;
+	bool vddadc_en_ac;
+	bool vddadc_en_usb;
+	int vbat;
+	int old_vbat;
+	bool usb_device_is_unrecognised;
+	bool autopower;
+	bool autopower_cfg;
+	int invalid_charger_detect_state;
+	int is_aca_rid;
+	atomic_t current_stepping_sessions;
+	struct ab8500 *parent;
+	struct ab8500_gpadc *gpadc;
+	struct abx500_bm_data *bm;
+	struct ab8500_charger_event_flags flags;
+	struct ab8500_charger_usb_state usb_state;
+	struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
+	struct ux500_charger ac_chg;
+	struct ux500_charger usb_chg;
+	struct ab8500_charger_info ac;
+	struct ab8500_charger_info usb;
+	struct regulator *regu;
+	struct workqueue_struct *charger_wq;
+	struct mutex usb_ipt_crnt_lock;
+	struct delayed_work check_vbat_work;
+	struct delayed_work check_hw_failure_work;
+	struct delayed_work check_usbchgnotok_work;
+	struct delayed_work kick_wd_work;
+	struct delayed_work usb_state_changed_work;
+	struct delayed_work attach_work;
+	struct delayed_work ac_charger_attached_work;
+	struct delayed_work usb_charger_attached_work;
+	struct delayed_work vbus_drop_end_work;
+	struct work_struct ac_work;
+	struct work_struct detect_usb_type_work;
+	struct work_struct usb_link_status_work;
+	struct work_struct check_main_thermal_prot_work;
+	struct work_struct check_usb_thermal_prot_work;
+	struct usb_phy *usb_phy;
+	struct notifier_block nb;
+	struct mutex charger_attached_mutex;
+};
+
+/* AC properties */
+static enum power_supply_property ab8500_charger_ac_props[] = {
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+};
+
+/* USB properties */
+static enum power_supply_property ab8500_charger_usb_props[] = {
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+};
+
+/*
+ * Function for enabling and disabling sw fallback mode
+ * should always be disabled when no charger is connected.
+ */
+static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
+		bool fallback)
+{
+	u8 val;
+	u8 reg;
+	u8 bank;
+	u8 bit;
+	int ret;
+
+	dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
+
+	if (is_ab8500(di->parent)) {
+		bank = 0x15;
+		reg = 0x0;
+		bit = 3;
+	} else {
+		bank = AB8500_SYS_CTRL1_BLOCK;
+		reg = AB8500_SW_CONTROL_FALLBACK;
+		bit = 0;
+	}
+
+	/* read the register containing fallback bit */
+	ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%d read failed\n", __LINE__);
+		return;
+	}
+
+	if (is_ab8500(di->parent)) {
+		/* enable the OPT emulation registers */
+		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
+		if (ret) {
+			dev_err(di->dev, "%d write failed\n", __LINE__);
+			goto disable_otp;
+		}
+	}
+
+	if (fallback)
+		val |= (1 << bit);
+	else
+		val &= ~(1 << bit);
+
+	/* write back the changed fallback bit value to register */
+	ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
+	if (ret) {
+		dev_err(di->dev, "%d write failed\n", __LINE__);
+	}
+
+disable_otp:
+	if (is_ab8500(di->parent)) {
+		/* disable the set OTP registers again */
+		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
+		if (ret) {
+			dev_err(di->dev, "%d write failed\n", __LINE__);
+		}
+	}
+}
+
+/**
+ * ab8500_power_supply_changed - a wrapper with local extentions for
+ * power_supply_changed
+ * @di:	  pointer to the ab8500_charger structure
+ * @psy:  pointer to power_supply_that have changed.
+ *
+ */
+static void ab8500_power_supply_changed(struct ab8500_charger *di,
+					struct power_supply *psy)
+{
+	if (di->autopower_cfg) {
+		if (!di->usb.charger_connected &&
+		    !di->ac.charger_connected &&
+		    di->autopower) {
+			di->autopower = false;
+			ab8500_enable_disable_sw_fallback(di, false);
+		} else if (!di->autopower &&
+			   (di->ac.charger_connected ||
+			    di->usb.charger_connected)) {
+			di->autopower = true;
+			ab8500_enable_disable_sw_fallback(di, true);
+		}
+	}
+	power_supply_changed(psy);
+}
+
+static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
+	bool connected)
+{
+	if (connected != di->usb.charger_connected) {
+		dev_dbg(di->dev, "USB connected:%i\n", connected);
+		di->usb.charger_connected = connected;
+
+		if (!connected)
+			di->flags.vbus_drop_end = false;
+
+		sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");
+
+		if (connected) {
+			mutex_lock(&di->charger_attached_mutex);
+			mutex_unlock(&di->charger_attached_mutex);
+
+			if (is_ab8500(di->parent))
+				queue_delayed_work(di->charger_wq,
+					   &di->usb_charger_attached_work,
+					   HZ);
+		} else {
+			cancel_delayed_work_sync(&di->usb_charger_attached_work);
+			mutex_lock(&di->charger_attached_mutex);
+			mutex_unlock(&di->charger_attached_mutex);
+		}
+	}
+}
+
+/**
+ * ab8500_charger_get_ac_voltage() - get ac charger voltage
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Returns ac charger voltage (on success)
+ */
+static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
+{
+	int vch;
+
+	/* Only measure voltage if the charger is connected */
+	if (di->ac.charger_connected) {
+		vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
+		if (vch < 0)
+			dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
+	} else {
+		vch = 0;
+	}
+	return vch;
+}
+
+/**
+ * ab8500_charger_ac_cv() - check if the main charger is in CV mode
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Returns ac charger CV mode (on success) else error code
+ */
+static int ab8500_charger_ac_cv(struct ab8500_charger *di)
+{
+	u8 val;
+	int ret = 0;
+
+	/* Only check CV mode if the charger is online */
+	if (di->ac.charger_online) {
+		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_CH_STATUS1_REG, &val);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return 0;
+		}
+
+		if (val & MAIN_CH_CV_ON)
+			ret = 1;
+		else
+			ret = 0;
+	}
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_get_vbus_voltage() - get vbus voltage
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * This function returns the vbus voltage.
+ * Returns vbus voltage (on success)
+ */
+static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
+{
+	int vch;
+
+	/* Only measure voltage if the charger is connected */
+	if (di->usb.charger_connected) {
+		vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
+		if (vch < 0)
+			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+	} else {
+		vch = 0;
+	}
+	return vch;
+}
+
+/**
+ * ab8500_charger_get_usb_current() - get usb charger current
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * This function returns the usb charger current.
+ * Returns usb current (on success) and error code on failure
+ */
+static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
+{
+	int ich;
+
+	/* Only measure current if the charger is online */
+	if (di->usb.charger_online) {
+		ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
+		if (ich < 0)
+			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+	} else {
+		ich = 0;
+	}
+	return ich;
+}
+
+/**
+ * ab8500_charger_get_ac_current() - get ac charger current
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * This function returns the ac charger current.
+ * Returns ac current (on success) and error code on failure.
+ */
+static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
+{
+	int ich;
+
+	/* Only measure current if the charger is online */
+	if (di->ac.charger_online) {
+		ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
+		if (ich < 0)
+			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
+	} else {
+		ich = 0;
+	}
+	return ich;
+}
+
+/**
+ * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Returns ac charger CV mode (on success) else error code
+ */
+static int ab8500_charger_usb_cv(struct ab8500_charger *di)
+{
+	int ret;
+	u8 val;
+
+	/* Only check CV mode if the charger is online */
+	if (di->usb.charger_online) {
+		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_CH_USBCH_STAT1_REG, &val);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return 0;
+		}
+
+		if (val & USB_CH_CV_ON)
+			ret = 1;
+		else
+			ret = 0;
+	} else {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_detect_chargers() - Detect the connected chargers
+ * @di:		pointer to the ab8500_charger structure
+ * @probe:	if probe, don't delay and wait for HW
+ *
+ * Returns the type of charger connected.
+ * For USB it will not mean we can actually charge from it
+ * but that there is a USB cable connected that we have to
+ * identify. This is used during startup when we don't get
+ * interrupts of the charger detection
+ *
+ * Returns an integer value, that means,
+ * NO_PW_CONN  no power supply is connected
+ * AC_PW_CONN  if the AC power supply is connected
+ * USB_PW_CONN  if the USB power supply is connected
+ * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
+ */
+static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
+{
+	int result = NO_PW_CONN;
+	int ret;
+	u8 val;
+
+	/* Check for AC charger */
+	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+		AB8500_CH_STATUS1_REG, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return ret;
+	}
+
+	if (val & MAIN_CH_DET)
+		result = AC_PW_CONN;
+
+	/* Check for USB charger */
+
+	if (!probe) {
+		/*
+		 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
+		 * when disconnecting ACA even though no
+		 * charger was connected. Try waiting a little
+		 * longer than the 100 ms of VBUS_DET_DBNC100...
+		 */
+		msleep(110);
+	}
+	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+		AB8500_CH_USBCH_STAT1_REG, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return ret;
+	}
+	dev_dbg(di->dev,
+		"%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
+		val);
+	if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
+		result |= USB_PW_CONN;
+
+	return result;
+}
+
+/**
+ * ab8500_charger_max_usb_curr() - get the max curr for the USB type
+ * @di:			pointer to the ab8500_charger structure
+ * @link_status:	the identified USB type
+ *
+ * Get the maximum current that is allowed to be drawn from the host
+ * based on the USB type.
+ * Returns error code in case of failure else 0 on success
+ */
+static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
+		enum ab8500_charger_link_status link_status)
+{
+	int ret = 0;
+
+	di->usb_device_is_unrecognised = false;
+
+	/*
+	 * Platform only supports USB 2.0.
+	 * This means that charging current from USB source
+	 * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
+	 * should set USB_CH_IP_CUR_LVL_0P5.
+	 */
+
+	switch (link_status) {
+	case USB_STAT_STD_HOST_NC:
+	case USB_STAT_STD_HOST_C_NS:
+	case USB_STAT_STD_HOST_C_S:
+		dev_dbg(di->dev, "USB Type - Standard host is "
+			"detected through USB driver\n");
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_HOST_CHG_HS_CHIRP:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_HOST_CHG_HS:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_ACA_RID_C_HS:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_ACA_RID_A:
+		/*
+		 * Dedicated charger level minus maximum current accessory
+		 * can consume (900mA). Closest level is 500mA
+		 */
+		dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		di->is_aca_rid = 1;
+		break;
+	case USB_STAT_ACA_RID_B:
+		/*
+		 * Dedicated charger level minus 120mA (20mA for ACA and
+		 * 100mA for potential accessory). Closest level is 1300mA
+		 */
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
+		dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
+				di->max_usb_in_curr.usb_type_max);
+		di->is_aca_rid = 1;
+		break;
+	case USB_STAT_HOST_CHG_NM:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_DEDICATED_CHG:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
+		di->is_aca_rid = 0;
+		break;
+	case USB_STAT_ACA_RID_C_HS_CHIRP:
+	case USB_STAT_ACA_RID_C_NM:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
+		di->is_aca_rid = 1;
+		break;
+	case USB_STAT_NOT_CONFIGURED:
+		if (di->vbus_detected) {
+			di->usb_device_is_unrecognised = true;
+			dev_dbg(di->dev, "USB Type - Legacy charger.\n");
+			di->max_usb_in_curr.usb_type_max =
+						USB_CH_IP_CUR_LVL_1P5;
+			break;
+		}
+	case USB_STAT_HM_IDGND:
+		dev_err(di->dev, "USB Type - Charging not allowed\n");
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
+		ret = -ENXIO;
+		break;
+	case USB_STAT_RESERVED:
+		if (is_ab8500(di->parent)) {
+			di->flags.vbus_collapse = true;
+			dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
+						"VBUS has collapsed\n");
+			ret = -ENXIO;
+			break;
+		} else {
+			dev_dbg(di->dev, "USB Type - Charging not allowed\n");
+			di->max_usb_in_curr.usb_type_max =
+						USB_CH_IP_CUR_LVL_0P05;
+			dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
+				link_status,
+				di->max_usb_in_curr.usb_type_max);
+			ret = -ENXIO;
+			break;
+		}
+	case USB_STAT_CARKIT_1:
+	case USB_STAT_CARKIT_2:
+	case USB_STAT_ACA_DOCK_CHARGER:
+	case USB_STAT_CHARGER_LINE_1:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
+				di->max_usb_in_curr.usb_type_max);
+		break;
+	case USB_STAT_NOT_VALID_LINK:
+		dev_err(di->dev, "USB Type invalid - try charging anyway\n");
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		break;
+
+	default:
+		dev_err(di->dev, "USB Type - Unknown\n");
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
+		ret = -ENXIO;
+		break;
+	};
+
+	di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
+	dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
+		link_status, di->max_usb_in_curr.set_max);
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_read_usb_type() - read the type of usb connected
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Detect the type of the plugged USB
+ * Returns error code in case of failure else 0 on success
+ */
+static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
+{
+	int ret;
+	u8 val;
+
+	ret = abx500_get_register_interruptible(di->dev,
+		AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return ret;
+	}
+	if (is_ab8500(di->parent))
+		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
+			AB8500_USB_LINE_STAT_REG, &val);
+	else
+		ret = abx500_get_register_interruptible(di->dev,
+			AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return ret;
+	}
+
+	/* get the USB type */
+	if (is_ab8500(di->parent))
+		val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
+	else
+		val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
+	ret = ab8500_charger_max_usb_curr(di,
+		(enum ab8500_charger_link_status) val);
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_detect_usb_type() - get the type of usb connected
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Detect the type of the plugged USB
+ * Returns error code in case of failure else 0 on success
+ */
+static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
+{
+	int i, ret;
+	u8 val;
+
+	/*
+	 * On getting the VBUS rising edge detect interrupt there
+	 * is a 250ms delay after which the register UsbLineStatus
+	 * is filled with valid data.
+	 */
+	for (i = 0; i < 10; i++) {
+		msleep(250);
+		ret = abx500_get_register_interruptible(di->dev,
+			AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
+			&val);
+		dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
+			__func__, val);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return ret;
+		}
+
+		if (is_ab8500(di->parent))
+			ret = abx500_get_register_interruptible(di->dev,
+				AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
+		else
+			ret = abx500_get_register_interruptible(di->dev,
+				AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return ret;
+		}
+		dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
+			val);
+		/*
+		 * Until the IT source register is read the UsbLineStatus
+		 * register is not updated, hence doing the same
+		 * Revisit this:
+		 */
+
+		/* get the USB type */
+		if (is_ab8500(di->parent))
+			val = (val & AB8500_USB_LINK_STATUS) >>
+							USB_LINK_STATUS_SHIFT;
+		else
+			val = (val & AB8505_USB_LINK_STATUS) >>
+							USB_LINK_STATUS_SHIFT;
+		if (val)
+			break;
+	}
+	ret = ab8500_charger_max_usb_curr(di,
+		(enum ab8500_charger_link_status) val);
+
+	return ret;
+}
+
+/*
+ * This array maps the raw hex value to charger voltage used by the AB8500
+ * Values taken from the UM0836
+ */
+static int ab8500_charger_voltage_map[] = {
+	3500 ,
+	3525 ,
+	3550 ,
+	3575 ,
+	3600 ,
+	3625 ,
+	3650 ,
+	3675 ,
+	3700 ,
+	3725 ,
+	3750 ,
+	3775 ,
+	3800 ,
+	3825 ,
+	3850 ,
+	3875 ,
+	3900 ,
+	3925 ,
+	3950 ,
+	3975 ,
+	4000 ,
+	4025 ,
+	4050 ,
+	4060 ,
+	4070 ,
+	4080 ,
+	4090 ,
+	4100 ,
+	4110 ,
+	4120 ,
+	4130 ,
+	4140 ,
+	4150 ,
+	4160 ,
+	4170 ,
+	4180 ,
+	4190 ,
+	4200 ,
+	4210 ,
+	4220 ,
+	4230 ,
+	4240 ,
+	4250 ,
+	4260 ,
+	4270 ,
+	4280 ,
+	4290 ,
+	4300 ,
+	4310 ,
+	4320 ,
+	4330 ,
+	4340 ,
+	4350 ,
+	4360 ,
+	4370 ,
+	4380 ,
+	4390 ,
+	4400 ,
+	4410 ,
+	4420 ,
+	4430 ,
+	4440 ,
+	4450 ,
+	4460 ,
+	4470 ,
+	4480 ,
+	4490 ,
+	4500 ,
+	4510 ,
+	4520 ,
+	4530 ,
+	4540 ,
+	4550 ,
+	4560 ,
+	4570 ,
+	4580 ,
+	4590 ,
+	4600 ,
+};
+
+static int ab8500_voltage_to_regval(int voltage)
+{
+	int i;
+
+	/* Special case for voltage below 3.5V */
+	if (voltage < ab8500_charger_voltage_map[0])
+		return LOW_VOLT_REG;
+
+	for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
+		if (voltage < ab8500_charger_voltage_map[i])
+			return i - 1;
+	}
+
+	/* If not last element, return error */
+	i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
+	if (voltage == ab8500_charger_voltage_map[i])
+		return i;
+	else
+		return -1;
+}
+
+static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
+{
+	int i;
+
+	if (curr < di->bm->chg_output_curr[0])
+		return 0;
+
+	for (i = 0; i < di->bm->n_chg_out_curr; i++) {
+		if (curr < di->bm->chg_output_curr[i])
+			return i - 1;
+	}
+
+	/* If not last element, return error */
+	i = di->bm->n_chg_out_curr - 1;
+	if (curr == di->bm->chg_output_curr[i])
+		return i;
+	else
+		return -1;
+}
+
+static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
+{
+	int i;
+
+	if (curr < di->bm->chg_input_curr[0])
+		return 0;
+
+	for (i = 0; i < di->bm->n_chg_in_curr; i++) {
+		if (curr < di->bm->chg_input_curr[i])
+			return i - 1;
+	}
+
+	/* If not last element, return error */
+	i = di->bm->n_chg_in_curr - 1;
+	if (curr == di->bm->chg_input_curr[i])
+		return i;
+	else
+		return -1;
+}
+
+/**
+ * ab8500_charger_get_usb_cur() - get usb current
+ * @di:		pointer to the ab8500_charger structre
+ *
+ * The usb stack provides the maximum current that can be drawn from
+ * the standard usb host. This will be in mA.
+ * This function converts current in mA to a value that can be written
+ * to the register. Returns -1 if charging is not allowed
+ */
+static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
+{
+	int ret = 0;
+	switch (di->usb_state.usb_current) {
+	case 100:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
+		break;
+	case 200:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
+		break;
+	case 300:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
+		break;
+	case 400:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
+		break;
+	case 500:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
+		break;
+	default:
+		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
+		ret = -EPERM;
+		break;
+	};
+	di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
+	return ret;
+}
+
+/**
+ * ab8500_charger_check_continue_stepping() - Check to allow stepping
+ * @di:		pointer to the ab8500_charger structure
+ * @reg:	select what charger register to check
+ *
+ * Check if current stepping should be allowed to continue.
+ * Checks if charger source has not collapsed. If it has, further stepping
+ * is not allowed.
+ */
+static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
+						   int reg)
+{
+	if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
+		return !di->flags.vbus_drop_end;
+	else
+		return true;
+}
+
+/**
+ * ab8500_charger_set_current() - set charger current
+ * @di:		pointer to the ab8500_charger structure
+ * @ich:	charger current, in mA
+ * @reg:	select what charger register to set
+ *
+ * Set charger current.
+ * There is no state machine in the AB to step up/down the charger
+ * current to avoid dips and spikes on MAIN, VBUS and VBAT when
+ * charging is started. Instead we need to implement
+ * this charger current step-up/down here.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_current(struct ab8500_charger *di,
+	int ich, int reg)
+{
+	int ret = 0;
+	int curr_index, prev_curr_index, shift_value, i;
+	u8 reg_value;
+	u32 step_udelay;
+	bool no_stepping = false;
+
+	atomic_inc(&di->current_stepping_sessions);
+
+	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+		reg, &reg_value);
+	if (ret < 0) {
+		dev_err(di->dev, "%s read failed\n", __func__);
+		goto exit_set_current;
+	}
+
+	switch (reg) {
+	case AB8500_MCH_IPT_CURLVL_REG:
+		shift_value = MAIN_CH_INPUT_CURR_SHIFT;
+		prev_curr_index = (reg_value >> shift_value);
+		curr_index = ab8500_current_to_regval(di, ich);
+		step_udelay = STEP_UDELAY;
+		if (!di->ac.charger_connected)
+			no_stepping = true;
+		break;
+	case AB8500_USBCH_IPT_CRNTLVL_REG:
+		if (is_ab8540(di->parent))
+			shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT;
+		else
+			shift_value = VBUS_IN_CURR_LIM_SHIFT;
+		prev_curr_index = (reg_value >> shift_value);
+		curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
+		step_udelay = STEP_UDELAY * 100;
+
+		if (!di->usb.charger_connected)
+			no_stepping = true;
+		break;
+	case AB8500_CH_OPT_CRNTLVL_REG:
+		shift_value = 0;
+		prev_curr_index = (reg_value >> shift_value);
+		curr_index = ab8500_current_to_regval(di, ich);
+		step_udelay = STEP_UDELAY;
+		if (curr_index && (curr_index - prev_curr_index) > 1)
+			step_udelay *= 100;
+
+		if (!di->usb.charger_connected && !di->ac.charger_connected)
+			no_stepping = true;
+
+		break;
+	default:
+		dev_err(di->dev, "%s current register not valid\n", __func__);
+		ret = -ENXIO;
+		goto exit_set_current;
+	}
+
+	if (curr_index < 0) {
+		dev_err(di->dev, "requested current limit out-of-range\n");
+		ret = -ENXIO;
+		goto exit_set_current;
+	}
+
+	/* only update current if it's been changed */
+	if (prev_curr_index == curr_index) {
+		dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
+			__func__, reg);
+		ret = 0;
+		goto exit_set_current;
+	}
+
+	dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
+		__func__, ich, reg);
+
+	if (no_stepping) {
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+					reg, (u8)curr_index << shift_value);
+		if (ret)
+			dev_err(di->dev, "%s write failed\n", __func__);
+	} else if (prev_curr_index > curr_index) {
+		for (i = prev_curr_index - 1; i >= curr_index; i--) {
+			dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
+				(u8) i << shift_value, reg);
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER, reg, (u8)i << shift_value);
+			if (ret) {
+				dev_err(di->dev, "%s write failed\n", __func__);
+				goto exit_set_current;
+			}
+			if (i != curr_index)
+				usleep_range(step_udelay, step_udelay * 2);
+		}
+	} else {
+		bool allow = true;
+		for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
+			dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
+				(u8)i << shift_value, reg);
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER, reg, (u8)i << shift_value);
+			if (ret) {
+				dev_err(di->dev, "%s write failed\n", __func__);
+				goto exit_set_current;
+			}
+			if (i != curr_index)
+				usleep_range(step_udelay, step_udelay * 2);
+
+			allow = ab8500_charger_check_continue_stepping(di, reg);
+		}
+	}
+
+exit_set_current:
+	atomic_dec(&di->current_stepping_sessions);
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
+ * @di:		pointer to the ab8500_charger structure
+ * @ich_in:	charger input current limit
+ *
+ * Sets the current that can be drawn from the USB host
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
+		int ich_in)
+{
+	int min_value;
+	int ret;
+
+	/* We should always use to lowest current limit */
+	min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
+	if (di->max_usb_in_curr.set_max > 0)
+		min_value = min(di->max_usb_in_curr.set_max, min_value);
+
+	if (di->usb_state.usb_current >= 0)
+		min_value = min(di->usb_state.usb_current, min_value);
+
+	switch (min_value) {
+	case 100:
+		if (di->vbat < VBAT_TRESH_IP_CUR_RED)
+			min_value = USB_CH_IP_CUR_LVL_0P05;
+		break;
+	case 500:
+		if (di->vbat < VBAT_TRESH_IP_CUR_RED)
+			min_value = USB_CH_IP_CUR_LVL_0P45;
+		break;
+	default:
+		break;
+	}
+
+	dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
+
+	mutex_lock(&di->usb_ipt_crnt_lock);
+	ret = ab8500_charger_set_current(di, min_value,
+		AB8500_USBCH_IPT_CRNTLVL_REG);
+	mutex_unlock(&di->usb_ipt_crnt_lock);
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_set_main_in_curr() - set main charger input current
+ * @di:		pointer to the ab8500_charger structure
+ * @ich_in:	input charger current, in mA
+ *
+ * Set main charger input current.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
+	int ich_in)
+{
+	return ab8500_charger_set_current(di, ich_in,
+		AB8500_MCH_IPT_CURLVL_REG);
+}
+
+/**
+ * ab8500_charger_set_output_curr() - set charger output current
+ * @di:		pointer to the ab8500_charger structure
+ * @ich_out:	output charger current, in mA
+ *
+ * Set charger output current.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
+	int ich_out)
+{
+	return ab8500_charger_set_current(di, ich_out,
+		AB8500_CH_OPT_CRNTLVL_REG);
+}
+
+/**
+ * ab8500_charger_led_en() - turn on/off chargign led
+ * @di:		pointer to the ab8500_charger structure
+ * @on:		flag to turn on/off the chargign led
+ *
+ * Power ON/OFF charging LED indication
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
+{
+	int ret;
+
+	if (on) {
+		/* Power ON charging LED indicator, set LED current to 5mA */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_LED_INDICATOR_PWM_CTRL,
+			(LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
+		if (ret) {
+			dev_err(di->dev, "Power ON LED failed\n");
+			return ret;
+		}
+		/* LED indicator PWM duty cycle 252/256 */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_LED_INDICATOR_PWM_DUTY,
+			LED_INDICATOR_PWM_DUTY_252_256);
+		if (ret) {
+			dev_err(di->dev, "Set LED PWM duty cycle failed\n");
+			return ret;
+		}
+	} else {
+		/* Power off charging LED indicator */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_LED_INDICATOR_PWM_CTRL,
+			LED_INDICATOR_PWM_DIS);
+		if (ret) {
+			dev_err(di->dev, "Power-off LED failed\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_ac_en() - enable or disable ac charging
+ * @di:		pointer to the ab8500_charger structure
+ * @enable:	enable/disable flag
+ * @vset:	charging voltage
+ * @iset:	charging current
+ *
+ * Enable/Disable AC/Mains charging and turns on/off the charging led
+ * respectively.
+ **/
+static int ab8500_charger_ac_en(struct ux500_charger *charger,
+	int enable, int vset, int iset)
+{
+	int ret;
+	int volt_index;
+	int curr_index;
+	int input_curr_index;
+	u8 overshoot = 0;
+
+	struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
+
+	if (enable) {
+		/* Check if AC is connected */
+		if (!di->ac.charger_connected) {
+			dev_err(di->dev, "AC charger not connected\n");
+			return -ENXIO;
+		}
+
+		/* Enable AC charging */
+		dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
+
+		/*
+		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
+		 * will be triggered everytime we enable the VDD ADC supply.
+		 * This will turn off charging for a short while.
+		 * It can be avoided by having the supply on when
+		 * there is a charger enabled. Normally the VDD ADC supply
+		 * is enabled everytime a GPADC conversion is triggered. We will
+		 * force it to be enabled from this driver to have
+		 * the GPADC module independant of the AB8500 chargers
+		 */
+		if (!di->vddadc_en_ac) {
+			ret = regulator_enable(di->regu);
+			if (ret)
+				dev_warn(di->dev,
+					"Failed to enable regulator\n");
+			else
+				di->vddadc_en_ac = true;
+		}
+
+		/* Check if the requested voltage or current is valid */
+		volt_index = ab8500_voltage_to_regval(vset);
+		curr_index = ab8500_current_to_regval(di, iset);
+		input_curr_index = ab8500_current_to_regval(di,
+			di->bm->chg_params->ac_curr_max);
+		if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
+			dev_err(di->dev,
+				"Charger voltage or current too high, "
+				"charging not started\n");
+			return -ENXIO;
+		}
+
+		/* ChVoltLevel: maximum battery charging voltage */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
+		if (ret) {
+			dev_err(di->dev, "%s write failed\n", __func__);
+			return ret;
+		}
+		/* MainChInputCurr: current that can be drawn from the charger*/
+		ret = ab8500_charger_set_main_in_curr(di,
+			di->bm->chg_params->ac_curr_max);
+		if (ret) {
+			dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
+				__func__);
+			return ret;
+		}
+		/* ChOutputCurentLevel: protected output current */
+		ret = ab8500_charger_set_output_curr(di, iset);
+		if (ret) {
+			dev_err(di->dev, "%s "
+				"Failed to set ChOutputCurentLevel\n",
+				__func__);
+			return ret;
+		}
+
+		/* Check if VBAT overshoot control should be enabled */
+		if (!di->bm->enable_overshoot)
+			overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
+
+		/* Enable Main Charger */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
+		if (ret) {
+			dev_err(di->dev, "%s write failed\n", __func__);
+			return ret;
+		}
+
+		/* Power on charging LED indication */
+		ret = ab8500_charger_led_en(di, true);
+		if (ret < 0)
+			dev_err(di->dev, "failed to enable LED\n");
+
+		di->ac.charger_online = 1;
+	} else {
+		/* Disable AC charging */
+		if (is_ab8500_1p1_or_earlier(di->parent)) {
+			/*
+			 * For ABB revision 1.0 and 1.1 there is a bug in the
+			 * watchdog logic. That means we have to continously
+			 * kick the charger watchdog even when no charger is
+			 * connected. This is only valid once the AC charger
+			 * has been enabled. This is a bug that is not handled
+			 * by the algorithm and the watchdog have to be kicked
+			 * by the charger driver when the AC charger
+			 * is disabled
+			 */
+			if (di->ac_conn) {
+				queue_delayed_work(di->charger_wq,
+					&di->kick_wd_work,
+					round_jiffies(WD_KICK_INTERVAL));
+			}
+
+			/*
+			 * We can't turn off charging completely
+			 * due to a bug in AB8500 cut1.
+			 * If we do, charging will not start again.
+			 * That is why we set the lowest voltage
+			 * and current possible
+			 */
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER,
+				AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
+			if (ret) {
+				dev_err(di->dev,
+					"%s write failed\n", __func__);
+				return ret;
+			}
+
+			ret = ab8500_charger_set_output_curr(di, 0);
+			if (ret) {
+				dev_err(di->dev, "%s "
+					"Failed to set ChOutputCurentLevel\n",
+					__func__);
+				return ret;
+			}
+		} else {
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER,
+				AB8500_MCH_CTRL1, 0);
+			if (ret) {
+				dev_err(di->dev,
+					"%s write failed\n", __func__);
+				return ret;
+			}
+		}
+
+		ret = ab8500_charger_led_en(di, false);
+		if (ret < 0)
+			dev_err(di->dev, "failed to disable LED\n");
+
+		di->ac.charger_online = 0;
+		di->ac.wd_expired = false;
+
+		/* Disable regulator if enabled */
+		if (di->vddadc_en_ac) {
+			regulator_disable(di->regu);
+			di->vddadc_en_ac = false;
+		}
+
+		dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
+	}
+	ab8500_power_supply_changed(di, di->ac_chg.psy);
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_usb_en() - enable usb charging
+ * @di:		pointer to the ab8500_charger structure
+ * @enable:	enable/disable flag
+ * @vset:	charging voltage
+ * @ich_out:	charger output current
+ *
+ * Enable/Disable USB charging and turns on/off the charging led respectively.
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_usb_en(struct ux500_charger *charger,
+	int enable, int vset, int ich_out)
+{
+	int ret;
+	int volt_index;
+	int curr_index;
+	u8 overshoot = 0;
+
+	struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
+
+	if (enable) {
+		/* Check if USB is connected */
+		if (!di->usb.charger_connected) {
+			dev_err(di->dev, "USB charger not connected\n");
+			return -ENXIO;
+		}
+
+		/*
+		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
+		 * will be triggered everytime we enable the VDD ADC supply.
+		 * This will turn off charging for a short while.
+		 * It can be avoided by having the supply on when
+		 * there is a charger enabled. Normally the VDD ADC supply
+		 * is enabled everytime a GPADC conversion is triggered. We will
+		 * force it to be enabled from this driver to have
+		 * the GPADC module independant of the AB8500 chargers
+		 */
+		if (!di->vddadc_en_usb) {
+			ret = regulator_enable(di->regu);
+			if (ret)
+				dev_warn(di->dev,
+					"Failed to enable regulator\n");
+			else
+				di->vddadc_en_usb = true;
+		}
+
+		/* Enable USB charging */
+		dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
+
+		/* Check if the requested voltage or current is valid */
+		volt_index = ab8500_voltage_to_regval(vset);
+		curr_index = ab8500_current_to_regval(di, ich_out);
+		if (volt_index < 0 || curr_index < 0) {
+			dev_err(di->dev,
+				"Charger voltage or current too high, "
+				"charging not started\n");
+			return -ENXIO;
+		}
+
+		/* ChVoltLevel: max voltage upto which battery can be charged */
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
+		if (ret) {
+			dev_err(di->dev, "%s write failed\n", __func__);
+			return ret;
+		}
+		/* Check if VBAT overshoot control should be enabled */
+		if (!di->bm->enable_overshoot)
+			overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
+
+		/* Enable USB Charger */
+		dev_dbg(di->dev,
+			"Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
+		if (ret) {
+			dev_err(di->dev, "%s write failed\n", __func__);
+			return ret;
+		}
+
+		/* If success power on charging LED indication */
+		ret = ab8500_charger_led_en(di, true);
+		if (ret < 0)
+			dev_err(di->dev, "failed to enable LED\n");
+
+		di->usb.charger_online = 1;
+
+		/* USBChInputCurr: current that can be drawn from the usb */
+		ret = ab8500_charger_set_vbus_in_curr(di,
+					di->max_usb_in_curr.usb_type_max);
+		if (ret) {
+			dev_err(di->dev, "setting USBChInputCurr failed\n");
+			return ret;
+		}
+
+		/* ChOutputCurentLevel: protected output current */
+		ret = ab8500_charger_set_output_curr(di, ich_out);
+		if (ret) {
+			dev_err(di->dev, "%s "
+				"Failed to set ChOutputCurentLevel\n",
+				__func__);
+			return ret;
+		}
+
+		queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
+
+	} else {
+		/* Disable USB charging */
+		dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
+		ret = abx500_set_register_interruptible(di->dev,
+			AB8500_CHARGER,
+			AB8500_USBCH_CTRL1_REG, 0);
+		if (ret) {
+			dev_err(di->dev,
+				"%s write failed\n", __func__);
+			return ret;
+		}
+
+		ret = ab8500_charger_led_en(di, false);
+		if (ret < 0)
+			dev_err(di->dev, "failed to disable LED\n");
+		/* USBChInputCurr: current that can be drawn from the usb */
+		ret = ab8500_charger_set_vbus_in_curr(di, 0);
+		if (ret) {
+			dev_err(di->dev, "setting USBChInputCurr failed\n");
+			return ret;
+		}
+
+		/* ChOutputCurentLevel: protected output current */
+		ret = ab8500_charger_set_output_curr(di, 0);
+		if (ret) {
+			dev_err(di->dev, "%s "
+				"Failed to reset ChOutputCurentLevel\n",
+				__func__);
+			return ret;
+		}
+		di->usb.charger_online = 0;
+		di->usb.wd_expired = false;
+
+		/* Disable regulator if enabled */
+		if (di->vddadc_en_usb) {
+			regulator_disable(di->regu);
+			di->vddadc_en_usb = false;
+		}
+
+		dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
+
+		/* Cancel any pending Vbat check work */
+		cancel_delayed_work(&di->check_vbat_work);
+
+	}
+	ab8500_power_supply_changed(di, di->usb_chg.psy);
+
+	return ret;
+}
+
+static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
+				unsigned long event, void *data)
+{
+	int ret;
+	struct device *dev = data;
+	/*Toggle External charger control pin*/
+	ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
+				  AB8500_SYS_CHARGER_CONTROL_REG,
+				  EXTERNAL_CHARGER_DISABLE_REG_VAL);
+	if (ret < 0) {
+		dev_err(dev, "write reg failed %d\n", ret);
+		goto out;
+	}
+	ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
+				  AB8500_SYS_CHARGER_CONTROL_REG,
+				  EXTERNAL_CHARGER_ENABLE_REG_VAL);
+	if (ret < 0)
+		dev_err(dev, "Write reg failed %d\n", ret);
+
+out:
+	return ret;
+}
+
+/**
+ * ab8500_charger_usb_check_enable() - enable usb charging
+ * @charger:	pointer to the ux500_charger structure
+ * @vset:	charging voltage
+ * @iset:	charger output current
+ *
+ * Check if the VBUS charger has been disconnected and reconnected without
+ * AB8500 rising an interrupt. Returns 0 on success.
+ */
+static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
+	int vset, int iset)
+{
+	u8 usbch_ctrl1 = 0;
+	int ret = 0;
+
+	struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
+
+	if (!di->usb.charger_connected)
+		return ret;
+
+	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+				AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
+	if (ret < 0) {
+		dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+		return ret;
+	}
+	dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
+
+	if (!(usbch_ctrl1 & USB_CH_ENA)) {
+		dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
+
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+					AB8500_CHARGER, AB8500_CHARGER_CTRL,
+					DROP_COUNT_RESET, DROP_COUNT_RESET);
+		if (ret < 0) {
+			dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
+			return ret;
+		}
+
+		ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
+		if (ret < 0) {
+			dev_err(di->dev, "Failed to enable VBUS charger %d\n",
+					__LINE__);
+			return ret;
+		}
+	}
+	return ret;
+}
+
+/**
+ * ab8500_charger_ac_check_enable() - enable usb charging
+ * @charger:	pointer to the ux500_charger structure
+ * @vset:	charging voltage
+ * @iset:	charger output current
+ *
+ * Check if the AC charger has been disconnected and reconnected without
+ * AB8500 rising an interrupt. Returns 0 on success.
+ */
+static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
+	int vset, int iset)
+{
+	u8 mainch_ctrl1 = 0;
+	int ret = 0;
+
+	struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
+
+	if (!di->ac.charger_connected)
+		return ret;
+
+	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+				AB8500_MCH_CTRL1, &mainch_ctrl1);
+	if (ret < 0) {
+		dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+		return ret;
+	}
+	dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
+
+	if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
+		dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
+
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+					AB8500_CHARGER, AB8500_CHARGER_CTRL,
+					DROP_COUNT_RESET, DROP_COUNT_RESET);
+
+		if (ret < 0) {
+			dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
+			return ret;
+		}
+
+		ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
+		if (ret < 0) {
+			dev_err(di->dev, "failed to enable AC charger %d\n",
+				__LINE__);
+			return ret;
+		}
+	}
+	return ret;
+}
+
+/**
+ * ab8500_charger_watchdog_kick() - kick charger watchdog
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Kick charger watchdog
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
+{
+	int ret;
+	struct ab8500_charger *di;
+
+	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
+		di = to_ab8500_charger_ac_device_info(charger);
+	else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
+		di = to_ab8500_charger_usb_device_info(charger);
+	else
+		return -ENXIO;
+
+	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+		AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
+	if (ret)
+		dev_err(di->dev, "Failed to kick WD!\n");
+
+	return ret;
+}
+
+/**
+ * ab8500_charger_update_charger_current() - update charger current
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Update the charger output current for the specified charger
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
+		int ich_out)
+{
+	int ret;
+	struct ab8500_charger *di;
+
+	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
+		di = to_ab8500_charger_ac_device_info(charger);
+	else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
+		di = to_ab8500_charger_usb_device_info(charger);
+	else
+		return -ENXIO;
+
+	ret = ab8500_charger_set_output_curr(di, ich_out);
+	if (ret) {
+		dev_err(di->dev, "%s "
+			"Failed to set ChOutputCurentLevel\n",
+			__func__);
+		return ret;
+	}
+
+	/* Reset the main and usb drop input current measurement counter */
+	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+				AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
+	if (ret) {
+		dev_err(di->dev, "%s write failed\n", __func__);
+		return ret;
+	}
+
+	return ret;
+}
+
+/**
+ * ab8540_charger_power_path_enable() - enable usb power path mode
+ * @charger:	pointer to the ux500_charger structure
+ * @enable:	enable/disable flag
+ *
+ * Enable or disable the power path for usb mode
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8540_charger_power_path_enable(struct ux500_charger *charger,
+		bool enable)
+{
+	int ret;
+	struct ab8500_charger *di;
+
+	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
+		di = to_ab8500_charger_usb_device_info(charger);
+	else
+		return -ENXIO;
+
+	ret = abx500_mask_and_set_register_interruptible(di->dev,
+				AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
+				BUS_POWER_PATH_MODE_ENA, enable);
+	if (ret) {
+		dev_err(di->dev, "%s write failed\n", __func__);
+		return ret;
+	}
+
+	return ret;
+}
+
+
+/**
+ * ab8540_charger_usb_pre_chg_enable() - enable usb pre change
+ * @charger:	pointer to the ux500_charger structure
+ * @enable:	enable/disable flag
+ *
+ * Enable or disable the pre-chage for usb mode
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger,
+		bool enable)
+{
+	int ret;
+	struct ab8500_charger *di;
+
+	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
+		di = to_ab8500_charger_usb_device_info(charger);
+	else
+		return -ENXIO;
+
+	ret = abx500_mask_and_set_register_interruptible(di->dev,
+				AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
+				BUS_POWER_PATH_PRECHG_ENA, enable);
+	if (ret) {
+		dev_err(di->dev, "%s write failed\n", __func__);
+		return ret;
+	}
+
+	return ret;
+}
+
+static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
+{
+	struct power_supply *psy;
+	struct power_supply *ext = dev_get_drvdata(dev);
+	const char **supplicants = (const char **)ext->supplied_to;
+	struct ab8500_charger *di;
+	union power_supply_propval ret;
+	int j;
+	struct ux500_charger *usb_chg;
+
+	usb_chg = (struct ux500_charger *)data;
+	psy = usb_chg->psy;
+
+	di = to_ab8500_charger_usb_device_info(usb_chg);
+
+	/* For all psy where the driver name appears in any supplied_to */
+	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
+	if (j < 0)
+		return 0;
+
+	/* Go through all properties for the psy */
+	for (j = 0; j < ext->desc->num_properties; j++) {
+		enum power_supply_property prop;
+		prop = ext->desc->properties[j];
+
+		if (power_supply_get_property(ext, prop, &ret))
+			continue;
+
+		switch (prop) {
+		case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+			switch (ext->desc->type) {
+			case POWER_SUPPLY_TYPE_BATTERY:
+				di->vbat = ret.intval / 1000;
+				break;
+			default:
+				break;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+	return 0;
+}
+
+/**
+ * ab8500_charger_check_vbat_work() - keep vbus current within spec
+ * @work	pointer to the work_struct structure
+ *
+ * Due to a asic bug it is necessary to lower the input current to the vbus
+ * charger when charging with at some specific levels. This issue is only valid
+ * for below a certain battery voltage. This function makes sure that the
+ * the allowed current limit isn't exceeded.
+ */
+static void ab8500_charger_check_vbat_work(struct work_struct *work)
+{
+	int t = 10;
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, check_vbat_work.work);
+
+	class_for_each_device(power_supply_class, NULL,
+		di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
+
+	/* First run old_vbat is 0. */
+	if (di->old_vbat == 0)
+		di->old_vbat = di->vbat;
+
+	if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
+		di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
+		(di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
+		di->vbat > VBAT_TRESH_IP_CUR_RED))) {
+
+		dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
+			" old: %d\n", di->max_usb_in_curr.usb_type_max,
+			di->vbat, di->old_vbat);
+		ab8500_charger_set_vbus_in_curr(di,
+					di->max_usb_in_curr.usb_type_max);
+		power_supply_changed(di->usb_chg.psy);
+	}
+
+	di->old_vbat = di->vbat;
+
+	/*
+	 * No need to check the battery voltage every second when not close to
+	 * the threshold.
+	 */
+	if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
+		(di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
+			t = 1;
+
+	queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
+}
+
+/**
+ * ab8500_charger_check_hw_failure_work() - check main charger failure
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for checking the main charger status
+ */
+static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
+{
+	int ret;
+	u8 reg_value;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, check_hw_failure_work.work);
+
+	/* Check if the status bits for HW failure is still active */
+	if (di->flags.mainextchnotok) {
+		ret = abx500_get_register_interruptible(di->dev,
+			AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return;
+		}
+		if (!(reg_value & MAIN_CH_NOK)) {
+			di->flags.mainextchnotok = false;
+			ab8500_power_supply_changed(di, di->ac_chg.psy);
+		}
+	}
+	if (di->flags.vbus_ovv) {
+		ret = abx500_get_register_interruptible(di->dev,
+			AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
+			&reg_value);
+		if (ret < 0) {
+			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+			return;
+		}
+		if (!(reg_value & VBUS_OVV_TH)) {
+			di->flags.vbus_ovv = false;
+			ab8500_power_supply_changed(di, di->usb_chg.psy);
+		}
+	}
+	/* If we still have a failure, schedule a new check */
+	if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
+		queue_delayed_work(di->charger_wq,
+			&di->check_hw_failure_work, round_jiffies(HZ));
+	}
+}
+
+/**
+ * ab8500_charger_kick_watchdog_work() - kick the watchdog
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for kicking the charger watchdog.
+ *
+ * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
+ * logic. That means we have to continously kick the charger
+ * watchdog even when no charger is connected. This is only
+ * valid once the AC charger has been enabled. This is
+ * a bug that is not handled by the algorithm and the
+ * watchdog have to be kicked by the charger driver
+ * when the AC charger is disabled
+ */
+static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
+{
+	int ret;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, kick_wd_work.work);
+
+	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+		AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
+	if (ret)
+		dev_err(di->dev, "Failed to kick WD!\n");
+
+	/* Schedule a new watchdog kick */
+	queue_delayed_work(di->charger_wq,
+		&di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
+}
+
+/**
+ * ab8500_charger_ac_work() - work to get and set main charger status
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for checking the main charger status
+ */
+static void ab8500_charger_ac_work(struct work_struct *work)
+{
+	int ret;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, ac_work);
+
+	/*
+	 * Since we can't be sure that the events are received
+	 * synchronously, we have the check if the main charger is
+	 * connected by reading the status register
+	 */
+	ret = ab8500_charger_detect_chargers(di, false);
+	if (ret < 0)
+		return;
+
+	if (ret & AC_PW_CONN) {
+		di->ac.charger_connected = 1;
+		di->ac_conn = true;
+	} else {
+		di->ac.charger_connected = 0;
+	}
+
+	ab8500_power_supply_changed(di, di->ac_chg.psy);
+	sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
+}
+
+static void ab8500_charger_usb_attached_work(struct work_struct *work)
+{
+	struct ab8500_charger *di = container_of(work,
+						 struct ab8500_charger,
+						 usb_charger_attached_work.work);
+	int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
+	int ret, i;
+	u8 statval;
+
+	for (i = 0; i < 10; i++) {
+		ret = abx500_get_register_interruptible(di->dev,
+							AB8500_CHARGER,
+							AB8500_CH_USBCH_STAT1_REG,
+							&statval);
+		if (ret < 0) {
+			dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+			goto reschedule;
+		}
+		if ((statval & usbch) != usbch)
+			goto reschedule;
+
+		msleep(CHARGER_STATUS_POLL);
+	}
+
+	ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
+
+	mutex_lock(&di->charger_attached_mutex);
+	mutex_unlock(&di->charger_attached_mutex);
+
+	return;
+
+reschedule:
+	queue_delayed_work(di->charger_wq,
+			   &di->usb_charger_attached_work,
+			   HZ);
+}
+
+static void ab8500_charger_ac_attached_work(struct work_struct *work)
+{
+
+	struct ab8500_charger *di = container_of(work,
+						 struct ab8500_charger,
+						 ac_charger_attached_work.work);
+	int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
+		      MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
+	int ret, i;
+	u8 statval;
+
+	for (i = 0; i < 10; i++) {
+		ret = abx500_get_register_interruptible(di->dev,
+							AB8500_CHARGER,
+							AB8500_CH_STATUS2_REG,
+							&statval);
+		if (ret < 0) {
+			dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
+			goto reschedule;
+		}
+
+		if ((statval & mainch) != mainch)
+			goto reschedule;
+
+		msleep(CHARGER_STATUS_POLL);
+	}
+
+	ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
+	queue_work(di->charger_wq, &di->ac_work);
+
+	mutex_lock(&di->charger_attached_mutex);
+	mutex_unlock(&di->charger_attached_mutex);
+
+	return;
+
+reschedule:
+	queue_delayed_work(di->charger_wq,
+			   &di->ac_charger_attached_work,
+			   HZ);
+}
+
+/**
+ * ab8500_charger_detect_usb_type_work() - work to detect USB type
+ * @work:	Pointer to the work_struct structure
+ *
+ * Detect the type of USB plugged
+ */
+static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
+{
+	int ret;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, detect_usb_type_work);
+
+	/*
+	 * Since we can't be sure that the events are received
+	 * synchronously, we have the check if is
+	 * connected by reading the status register
+	 */
+	ret = ab8500_charger_detect_chargers(di, false);
+	if (ret < 0)
+		return;
+
+	if (!(ret & USB_PW_CONN)) {
+		dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
+		di->vbus_detected = false;
+		ab8500_charger_set_usb_connected(di, false);
+		ab8500_power_supply_changed(di, di->usb_chg.psy);
+	} else {
+		dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
+		di->vbus_detected = true;
+
+		if (is_ab8500_1p1_or_earlier(di->parent)) {
+			ret = ab8500_charger_detect_usb_type(di);
+			if (!ret) {
+				ab8500_charger_set_usb_connected(di, true);
+				ab8500_power_supply_changed(di,
+							    di->usb_chg.psy);
+			}
+		} else {
+			/*
+			 * For ABB cut2.0 and onwards we have an IRQ,
+			 * USB_LINK_STATUS that will be triggered when the USB
+			 * link status changes. The exception is USB connected
+			 * during startup. Then we don't get a
+			 * USB_LINK_STATUS IRQ
+			 */
+			if (di->vbus_detected_start) {
+				di->vbus_detected_start = false;
+				ret = ab8500_charger_detect_usb_type(di);
+				if (!ret) {
+					ab8500_charger_set_usb_connected(di,
+						true);
+					ab8500_power_supply_changed(di,
+						di->usb_chg.psy);
+				}
+			}
+		}
+	}
+}
+
+/**
+ * ab8500_charger_usb_link_attach_work() - work to detect USB type
+ * @work:	pointer to the work_struct structure
+ *
+ * Detect the type of USB plugged
+ */
+static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
+{
+	struct ab8500_charger *di =
+		container_of(work, struct ab8500_charger, attach_work.work);
+	int ret;
+
+	/* Update maximum input current if USB enumeration is not detected */
+	if (!di->usb.charger_online) {
+		ret = ab8500_charger_set_vbus_in_curr(di,
+					di->max_usb_in_curr.usb_type_max);
+		if (ret)
+			return;
+	}
+
+	ab8500_charger_set_usb_connected(di, true);
+	ab8500_power_supply_changed(di, di->usb_chg.psy);
+}
+
+/**
+ * ab8500_charger_usb_link_status_work() - work to detect USB type
+ * @work:	pointer to the work_struct structure
+ *
+ * Detect the type of USB plugged
+ */
+static void ab8500_charger_usb_link_status_work(struct work_struct *work)
+{
+	int detected_chargers;
+	int ret;
+	u8 val;
+	u8 link_status;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, usb_link_status_work);
+
+	/*
+	 * Since we can't be sure that the events are received
+	 * synchronously, we have the check if  is
+	 * connected by reading the status register
+	 */
+	detected_chargers = ab8500_charger_detect_chargers(di, false);
+	if (detected_chargers < 0)
+		return;
+
+	/*
+	 * Some chargers that breaks the USB spec is
+	 * identified as invalid by AB8500 and it refuse
+	 * to start the charging process. but by jumping
+	 * thru a few hoops it can be forced to start.
+	 */
+	if (is_ab8500(di->parent))
+		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
+					AB8500_USB_LINE_STAT_REG, &val);
+	else
+		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
+					AB8500_USB_LINK1_STAT_REG, &val);
+
+	if (ret >= 0)
+		dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
+	else
+		dev_dbg(di->dev, "Error reading USB link status\n");
+
+	if (is_ab8500(di->parent))
+		link_status = AB8500_USB_LINK_STATUS;
+	else
+		link_status = AB8505_USB_LINK_STATUS;
+
+	if (detected_chargers & USB_PW_CONN) {
+		if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
+				USB_STAT_NOT_VALID_LINK &&
+				di->invalid_charger_detect_state == 0) {
+			dev_dbg(di->dev,
+					"Invalid charger detected, state= 0\n");
+			/*Enable charger*/
+			abx500_mask_and_set_register_interruptible(di->dev,
+					AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
+					USB_CH_ENA, USB_CH_ENA);
+			/*Enable charger detection*/
+			abx500_mask_and_set_register_interruptible(di->dev,
+					AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
+					USB_CH_DET, USB_CH_DET);
+			di->invalid_charger_detect_state = 1;
+			/*exit and wait for new link status interrupt.*/
+			return;
+
+		}
+		if (di->invalid_charger_detect_state == 1) {
+			dev_dbg(di->dev,
+					"Invalid charger detected, state= 1\n");
+			/*Stop charger detection*/
+			abx500_mask_and_set_register_interruptible(di->dev,
+					AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
+					USB_CH_DET, 0x00);
+			/*Check link status*/
+			if (is_ab8500(di->parent))
+				ret = abx500_get_register_interruptible(di->dev,
+					AB8500_USB, AB8500_USB_LINE_STAT_REG,
+					&val);
+			else
+				ret = abx500_get_register_interruptible(di->dev,
+					AB8500_USB, AB8500_USB_LINK1_STAT_REG,
+					&val);
+
+			dev_dbg(di->dev, "USB link status= 0x%02x\n",
+				(val & link_status) >> USB_LINK_STATUS_SHIFT);
+			di->invalid_charger_detect_state = 2;
+		}
+	} else {
+		di->invalid_charger_detect_state = 0;
+	}
+
+	if (!(detected_chargers & USB_PW_CONN)) {
+		di->vbus_detected = false;
+		ab8500_charger_set_usb_connected(di, false);
+		ab8500_power_supply_changed(di, di->usb_chg.psy);
+		return;
+	}
+
+	dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
+	di->vbus_detected = true;
+	ret = ab8500_charger_read_usb_type(di);
+	if (ret) {
+		if (ret == -ENXIO) {
+			/* No valid charger type detected */
+			ab8500_charger_set_usb_connected(di, false);
+			ab8500_power_supply_changed(di, di->usb_chg.psy);
+		}
+		return;
+	}
+
+	if (di->usb_device_is_unrecognised) {
+		dev_dbg(di->dev,
+			"Potential Legacy Charger device. "
+			"Delay work for %d msec for USB enum "
+			"to finish",
+			WAIT_ACA_RID_ENUMERATION);
+		queue_delayed_work(di->charger_wq,
+				   &di->attach_work,
+				   msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
+	} else if (di->is_aca_rid == 1) {
+		/* Only wait once */
+		di->is_aca_rid++;
+		dev_dbg(di->dev,
+			"%s Wait %d msec for USB enum to finish",
+			__func__, WAIT_ACA_RID_ENUMERATION);
+		queue_delayed_work(di->charger_wq,
+				   &di->attach_work,
+				   msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
+	} else {
+		queue_delayed_work(di->charger_wq,
+				   &di->attach_work,
+				   0);
+	}
+}
+
+static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
+{
+	int ret;
+	unsigned long flags;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, usb_state_changed_work.work);
+
+	if (!di->vbus_detected)	{
+		dev_dbg(di->dev,
+			"%s !di->vbus_detected\n",
+			__func__);
+		return;
+	}
+
+	spin_lock_irqsave(&di->usb_state.usb_lock, flags);
+	di->usb_state.state = di->usb_state.state_tmp;
+	di->usb_state.usb_current = di->usb_state.usb_current_tmp;
+	spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
+
+	dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
+		__func__, di->usb_state.state, di->usb_state.usb_current);
+
+	switch (di->usb_state.state) {
+	case AB8500_BM_USB_STATE_RESET_HS:
+	case AB8500_BM_USB_STATE_RESET_FS:
+	case AB8500_BM_USB_STATE_SUSPEND:
+	case AB8500_BM_USB_STATE_MAX:
+		ab8500_charger_set_usb_connected(di, false);
+		ab8500_power_supply_changed(di, di->usb_chg.psy);
+		break;
+
+	case AB8500_BM_USB_STATE_RESUME:
+		/*
+		 * when suspend->resume there should be delay
+		 * of 1sec for enabling charging
+		 */
+		msleep(1000);
+		/* Intentional fall through */
+	case AB8500_BM_USB_STATE_CONFIGURED:
+		/*
+		 * USB is configured, enable charging with the charging
+		 * input current obtained from USB driver
+		 */
+		if (!ab8500_charger_get_usb_cur(di)) {
+			/* Update maximum input current */
+			ret = ab8500_charger_set_vbus_in_curr(di,
+					di->max_usb_in_curr.usb_type_max);
+			if (ret)
+				return;
+
+			ab8500_charger_set_usb_connected(di, true);
+			ab8500_power_supply_changed(di, di->usb_chg.psy);
+		}
+		break;
+
+	default:
+		break;
+	};
+}
+
+/**
+ * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for checking the USB charger Not OK status
+ */
+static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
+{
+	int ret;
+	u8 reg_value;
+	bool prev_status;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, check_usbchgnotok_work.work);
+
+	/* Check if the status bit for usbchargernotok is still active */
+	ret = abx500_get_register_interruptible(di->dev,
+		AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return;
+	}
+	prev_status = di->flags.usbchargernotok;
+
+	if (reg_value & VBUS_CH_NOK) {
+		di->flags.usbchargernotok = true;
+		/* Check again in 1sec */
+		queue_delayed_work(di->charger_wq,
+			&di->check_usbchgnotok_work, HZ);
+	} else {
+		di->flags.usbchargernotok = false;
+		di->flags.vbus_collapse = false;
+	}
+
+	if (prev_status != di->flags.usbchargernotok)
+		ab8500_power_supply_changed(di, di->usb_chg.psy);
+}
+
+/**
+ * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for checking the Main thermal prot status
+ */
+static void ab8500_charger_check_main_thermal_prot_work(
+	struct work_struct *work)
+{
+	int ret;
+	u8 reg_value;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, check_main_thermal_prot_work);
+
+	/* Check if the status bit for main_thermal_prot is still active */
+	ret = abx500_get_register_interruptible(di->dev,
+		AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return;
+	}
+	if (reg_value & MAIN_CH_TH_PROT)
+		di->flags.main_thermal_prot = true;
+	else
+		di->flags.main_thermal_prot = false;
+
+	ab8500_power_supply_changed(di, di->ac_chg.psy);
+}
+
+/**
+ * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
+ * @work:	pointer to the work_struct structure
+ *
+ * Work queue function for checking the USB thermal prot status
+ */
+static void ab8500_charger_check_usb_thermal_prot_work(
+	struct work_struct *work)
+{
+	int ret;
+	u8 reg_value;
+
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, check_usb_thermal_prot_work);
+
+	/* Check if the status bit for usb_thermal_prot is still active */
+	ret = abx500_get_register_interruptible(di->dev,
+		AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
+	if (ret < 0) {
+		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
+		return;
+	}
+	if (reg_value & USB_CH_TH_PROT)
+		di->flags.usb_thermal_prot = true;
+	else
+		di->flags.usb_thermal_prot = false;
+
+	ab8500_power_supply_changed(di, di->usb_chg.psy);
+}
+
+/**
+ * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "Main charger unplugged\n");
+	queue_work(di->charger_wq, &di->ac_work);
+
+	cancel_delayed_work_sync(&di->ac_charger_attached_work);
+	mutex_lock(&di->charger_attached_mutex);
+	mutex_unlock(&di->charger_attached_mutex);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_mainchplugdet_handler() - main charger plugged
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "Main charger plugged\n");
+	queue_work(di->charger_wq, &di->ac_work);
+
+	mutex_lock(&di->charger_attached_mutex);
+	mutex_unlock(&di->charger_attached_mutex);
+
+	if (is_ab8500(di->parent))
+		queue_delayed_work(di->charger_wq,
+			   &di->ac_charger_attached_work,
+			   HZ);
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_mainextchnotok_handler() - main charger not ok
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "Main charger not ok\n");
+	di->flags.mainextchnotok = true;
+	ab8500_power_supply_changed(di, di->ac_chg.psy);
+
+	/* Schedule a new HW failure check */
+	queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
+ * thermal protection threshold
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev,
+		"Die temp above Main charger thermal protection threshold\n");
+	queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
+ * thermal protection threshold
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev,
+		"Die temp ok for Main charger thermal protection threshold\n");
+	queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
+
+	return IRQ_HANDLED;
+}
+
+static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
+{
+	struct ab8500_charger *di = container_of(work,
+		struct ab8500_charger, vbus_drop_end_work.work);
+	int ret, curr;
+	u8 reg_value;
+
+	di->flags.vbus_drop_end = false;
+
+	/* Reset the drop counter */
+	abx500_set_register_interruptible(di->dev,
+				  AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
+
+	if (is_ab8540(di->parent))
+		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+				AB8540_CH_USBCH_STAT3_REG, &reg_value);
+	else
+		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
+				AB8500_CH_USBCH_STAT2_REG, &reg_value);
+	if (ret < 0) {
+		dev_err(di->dev, "%s read failed\n", __func__);
+		return;
+	}
+
+	if (is_ab8540(di->parent))
+		curr = di->bm->chg_input_curr[
+			reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK];
+	else
+		curr = di->bm->chg_input_curr[
+			reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
+
+	if (di->max_usb_in_curr.calculated_max != curr) {
+		/* USB source is collapsing */
+		di->max_usb_in_curr.calculated_max = curr;
+		dev_dbg(di->dev,
+			 "VBUS input current limiting to %d mA\n",
+			 di->max_usb_in_curr.calculated_max);
+	} else {
+		/*
+		 * USB source can not give more than this amount.
+		 * Taking more will collapse the source.
+		 */
+		di->max_usb_in_curr.set_max =
+			di->max_usb_in_curr.calculated_max;
+		dev_dbg(di->dev,
+			 "VBUS input current limited to %d mA\n",
+			 di->max_usb_in_curr.set_max);
+	}
+
+	if (di->usb.charger_connected)
+		ab8500_charger_set_vbus_in_curr(di,
+					di->max_usb_in_curr.usb_type_max);
+}
+
+/**
+ * ab8500_charger_vbusdetf_handler() - VBUS falling detected
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	di->vbus_detected = false;
+	dev_dbg(di->dev, "VBUS falling detected\n");
+	queue_work(di->charger_wq, &di->detect_usb_type_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_vbusdetr_handler() - VBUS rising detected
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	di->vbus_detected = true;
+	dev_dbg(di->dev, "VBUS rising detected\n");
+
+	queue_work(di->charger_wq, &di->detect_usb_type_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_usblinkstatus_handler() - USB link status has changed
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "USB link status changed\n");
+
+	queue_work(di->charger_wq, &di->usb_link_status_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
+ * thermal protection threshold
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev,
+		"Die temp above USB charger thermal protection threshold\n");
+	queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
+ * thermal protection threshold
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev,
+		"Die temp ok for USB charger thermal protection threshold\n");
+	queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "Not allowed USB charger detected\n");
+	queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_chwdexp_handler() - Charger watchdog expired
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "Charger watchdog expired\n");
+
+	/*
+	 * The charger that was online when the watchdog expired
+	 * needs to be restarted for charging to start again
+	 */
+	if (di->ac.charger_online) {
+		di->ac.wd_expired = true;
+		ab8500_power_supply_changed(di, di->ac_chg.psy);
+	}
+	if (di->usb.charger_online) {
+		di->usb.wd_expired = true;
+		ab8500_power_supply_changed(di, di->usb_chg.psy);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "VBUS charger drop ended\n");
+	di->flags.vbus_drop_end = true;
+
+	/*
+	 * VBUS might have dropped due to bad connection.
+	 * Schedule a new input limit set to the value SW requests.
+	 */
+	queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
+			   round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
+ * @irq:       interrupt number
+ * @_di:       pointer to the ab8500_charger structure
+ *
+ * Returns IRQ status(IRQ_HANDLED)
+ */
+static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
+{
+	struct ab8500_charger *di = _di;
+
+	dev_dbg(di->dev, "VBUS overvoltage detected\n");
+	di->flags.vbus_ovv = true;
+	ab8500_power_supply_changed(di, di->usb_chg.psy);
+
+	/* Schedule a new HW failure check */
+	queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * ab8500_charger_ac_get_property() - get the ac/mains properties
+ * @psy:       pointer to the power_supply structure
+ * @psp:       pointer to the power_supply_property structure
+ * @val:       pointer to the power_supply_propval union
+ *
+ * This function gets called when an application tries to get the ac/mains
+ * properties by reading the sysfs files.
+ * AC/Mains properties are online, present and voltage.
+ * online:     ac/mains charging is in progress or not
+ * present:    presence of the ac/mains
+ * voltage:    AC/Mains voltage
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_ac_get_property(struct power_supply *psy,
+	enum power_supply_property psp,
+	union power_supply_propval *val)
+{
+	struct ab8500_charger *di;
+	int ret;
+
+	di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (di->flags.mainextchnotok)
+			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		else if (di->ac.wd_expired || di->usb.wd_expired)
+			val->intval = POWER_SUPPLY_HEALTH_DEAD;
+		else if (di->flags.main_thermal_prot)
+			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		else
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = di->ac.charger_online;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = di->ac.charger_connected;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = ab8500_charger_get_ac_voltage(di);
+		if (ret >= 0)
+			di->ac.charger_voltage = ret;
+		/* On error, use previous value */
+		val->intval = di->ac.charger_voltage * 1000;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		/*
+		 * This property is used to indicate when CV mode is entered
+		 * for the AC charger
+		 */
+		di->ac.cv_active = ab8500_charger_ac_cv(di);
+		val->intval = di->ac.cv_active;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		ret = ab8500_charger_get_ac_current(di);
+		if (ret >= 0)
+			di->ac.charger_current = ret;
+		val->intval = di->ac.charger_current * 1000;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/**
+ * ab8500_charger_usb_get_property() - get the usb properties
+ * @psy:        pointer to the power_supply structure
+ * @psp:        pointer to the power_supply_property structure
+ * @val:        pointer to the power_supply_propval union
+ *
+ * This function gets called when an application tries to get the usb
+ * properties by reading the sysfs files.
+ * USB properties are online, present and voltage.
+ * online:     usb charging is in progress or not
+ * present:    presence of the usb
+ * voltage:    vbus voltage
+ * Returns error code in case of failure else 0(on success)
+ */
+static int ab8500_charger_usb_get_property(struct power_supply *psy,
+	enum power_supply_property psp,
+	union power_supply_propval *val)
+{
+	struct ab8500_charger *di;
+	int ret;
+
+	di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (di->flags.usbchargernotok)
+			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		else if (di->ac.wd_expired || di->usb.wd_expired)
+			val->intval = POWER_SUPPLY_HEALTH_DEAD;
+		else if (di->flags.usb_thermal_prot)
+			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		else if (di->flags.vbus_ovv)
+			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		else
+			val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = di->usb.charger_online;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = di->usb.charger_connected;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = ab8500_charger_get_vbus_voltage(di);
+		if (ret >= 0)
+			di->usb.charger_voltage = ret;
+		val->intval = di->usb.charger_voltage * 1000;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		/*
+		 * This property is used to indicate when CV mode is entered
+		 * for the USB charger
+		 */
+		di->usb.cv_active = ab8500_charger_usb_cv(di);
+		val->intval = di->usb.cv_active;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		ret = ab8500_charger_get_usb_current(di);
+		if (ret >= 0)
+			di->usb.charger_current = ret;
+		val->intval = di->usb.charger_current * 1000;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		/*
+		 * This property is used to indicate when VBUS has collapsed
+		 * due to too high output current from the USB charger
+		 */
+		if (di->flags.vbus_collapse)
+			val->intval = 1;
+		else
+			val->intval = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/**
+ * ab8500_charger_init_hw_registers() - Set up charger related registers
+ * @di:		pointer to the ab8500_charger structure
+ *
+ * Set up charger OVV, watchdog and maximum voltage registers as well as
+ * charging of the backup battery
+ */
+static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
+{
+	int ret = 0;
+	u8 bup_vch_range = 0, vbup33_vrtcn = 0;
+
+	/* Setup maximum charger current and voltage for ABB cut2.0 */
+	if (!is_ab8500_1p1_or_earlier(di->parent)) {
+		ret = abx500_set_register_interruptible(di->dev,
+			AB8500_CHARGER,
+			AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
+		if (ret) {
+			dev_err(di->dev,
+				"failed to set CH_VOLT_LVL_MAX_REG\n");
+			goto out;
+		}
+
+		if (is_ab8540(di->parent))
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
+				CH_OP_CUR_LVL_2P);
+		else
+			ret = abx500_set_register_interruptible(di->dev,
+				AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
+				CH_OP_CUR_LVL_1P6);
+		if (ret) {
+			dev_err(di->dev,
+				"failed to set CH_OPT_CRNTLVL_MAX_REG\n");
+			goto out;
+		}
+	}
+
+	if (is_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent)
+	 || is_ab8505_2p0(di->parent) || is_ab8540(di->parent))
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+			AB8500_CHARGER,
+			AB8500_USBCH_CTRL2_REG,
+			VBUS_AUTO_IN_CURR_LIM_ENA,
+			VBUS_AUTO_IN_CURR_LIM_ENA);
+	else
+		/*
+		 * VBUS OVV set to 6.3V and enable automatic current limitation
+		 */
+		ret = abx500_set_register_interruptible(di->dev,
+			AB8500_CHARGER,
+			AB8500_USBCH_CTRL2_REG,
+			VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
+	if (ret) {
+		dev_err(di->dev,
+			"failed to set automatic current limitation\n");
+		goto out;
+	}
+
+	/* Enable main watchdog in OTP */
+	ret = abx500_set_register_interruptible(di->dev,
+		AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
+	if (ret) {
+		dev_err(di->dev, "failed to enable main WD in OTP\n");
+		goto out;
+	}
+
+	/* Enable main watchdog */
+	ret = abx500_set_register_interruptible(di->dev,
+		AB8500_SYS_CTRL2_BLOCK,
+		AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
+	if (ret) {
+		dev_err(di->dev, "faile to enable main watchdog\n");
+		goto out;
+	}
+
+	/*
+	 * Due to internal synchronisation, Enable and Kick watchdog bits
+	 * cannot be enabled in a single write.
+	 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
+	 * between writing Enable then Kick bits.
+	 */
+	udelay(63);
+
+	/* Kick main watchdog */
+	ret = abx500_set_register_interruptible(di->dev,
+		AB8500_SYS_CTRL2_BLOCK,
+		AB8500_MAIN_WDOG_CTRL_REG,
+		(MAIN_WDOG_ENA | MAIN_WDOG_KICK));
+	if (ret) {
+		dev_err(di->dev, "failed to kick main watchdog\n");
+		goto out;
+	}
+
+	/* Disable main watchdog */
+	ret = abx500_set_register_interruptible(di->dev,
+		AB8500_SYS_CTRL2_BLOCK,
+		AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
+	if (ret) {
+		dev_err(di->dev, "failed to disable main watchdog\n");
+		goto out;
+	}
+
+	/* Set watchdog timeout */
+	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+		AB8500_CH_WD_TIMER_REG, WD_TIMER);
+	if (ret) {
+		dev_err(di->dev, "failed to set charger watchdog timeout\n");
+		goto out;
+	}
+
+	ret = ab8500_charger_led_en(di, false);
+	if (ret < 0) {
+		dev_err(di->dev, "failed to disable LED\n");
+		goto out;
+	}
+
+	/* Backup battery voltage and current */
+	if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V)
+		bup_vch_range = BUP_VCH_RANGE;
+	if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V)
+		vbup33_vrtcn = VBUP33_VRTCN;
+
+	ret = abx500_set_register_interruptible(di->dev,
+		AB8500_RTC,
+		AB8500_RTC_BACKUP_CHG_REG,
+		(di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
+	if (ret) {
+		dev_err(di->dev, "failed to setup backup battery charging\n");
+		goto out;
+	}
+	if (is_ab8540(di->parent)) {
+		ret = abx500_set_register_interruptible(di->dev,
+			AB8500_RTC,
+			AB8500_RTC_CTRL1_REG,
+			bup_vch_range | vbup33_vrtcn);
+		if (ret) {
+			dev_err(di->dev,
+				"failed to setup backup battery charging\n");
+			goto out;
+		}
+	}
+
+	/* Enable backup battery charging */
+	abx500_mask_and_set_register_interruptible(di->dev,
+		AB8500_RTC, AB8500_RTC_CTRL_REG,
+		RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
+	if (ret < 0)
+		dev_err(di->dev, "%s mask and set failed\n", __func__);
+
+	if (is_ab8540(di->parent)) {
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+			AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
+			BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V);
+		if (ret) {
+			dev_err(di->dev,
+				"failed to setup usb power path vsys voltage\n");
+			goto out;
+		}
+		ret = abx500_mask_and_set_register_interruptible(di->dev,
+			AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
+			BUS_PP_PRECHG_CURRENT_MASK, 0);
+		if (ret) {
+			dev_err(di->dev,
+				"failed to setup usb power path prechage current\n");
+			goto out;
+		}
+	}
+
+out:
+	return ret;
+}
+
+/*
+ * ab8500 charger driver interrupts and their respective isr
+ */
+static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
+	{"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
+	{"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
+	{"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
+	{"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
+	{"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
+	{"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
+	{"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
+	{"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
+	{"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
+	{"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
+	{"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
+	{"VBUS_OVV", ab8500_charger_vbusovv_handler},
+	{"CH_WD_EXP", ab8500_charger_chwdexp_handler},
+	{"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
+};
+
+static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
+		unsigned long event, void *power)
+{
+	struct ab8500_charger *di =
+		container_of(nb, struct ab8500_charger, nb);
+	enum ab8500_usb_state bm_usb_state;
+	unsigned mA = *((unsigned *)power);
+
+	if (!di)
+		return NOTIFY_DONE;
+
+	if (event != USB_EVENT_VBUS) {
+		dev_dbg(di->dev, "not a standard host, returning\n");
+		return NOTIFY_DONE;
+	}
+
+	/* TODO: State is fabricate  here. See if charger really needs USB
+	 * state or if mA is enough
+	 */
+	if ((di->usb_state.usb_current == 2) && (mA > 2))
+		bm_usb_state = AB8500_BM_USB_STATE_RESUME;
+	else if (mA == 0)
+		bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
+	else if (mA == 2)
+		bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
+	else if (mA >= 8) /* 8, 100, 500 */
+		bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
+	else /* Should never occur */
+		bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
+
+	dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
+		__func__, bm_usb_state, mA);
+
+	spin_lock(&di->usb_state.usb_lock);
+	di->usb_state.state_tmp = bm_usb_state;
+	di->usb_state.usb_current_tmp = mA;
+	spin_unlock(&di->usb_state.usb_lock);
+
+	/*
+	 * wait for some time until you get updates from the usb stack
+	 * and negotiations are completed
+	 */
+	queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
+
+	return NOTIFY_OK;
+}
+
+#if defined(CONFIG_PM)
+static int ab8500_charger_resume(struct platform_device *pdev)
+{
+	int ret;
+	struct ab8500_charger *di = platform_get_drvdata(pdev);
+
+	/*
+	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
+	 * logic. That means we have to continously kick the charger
+	 * watchdog even when no charger is connected. This is only
+	 * valid once the AC charger has been enabled. This is
+	 * a bug that is not handled by the algorithm and the
+	 * watchdog have to be kicked by the charger driver
+	 * when the AC charger is disabled
+	 */
+	if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
+		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
+			AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
+		if (ret)
+			dev_err(di->dev, "Failed to kick WD!\n");
+
+		/* If not already pending start a new timer */
+		queue_delayed_work(di->charger_wq, &di->kick_wd_work,
+				   round_jiffies(WD_KICK_INTERVAL));
+	}
+
+	/* If we still have a HW failure, schedule a new check */
+	if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
+		queue_delayed_work(di->charger_wq,
+			&di->check_hw_failure_work, 0);
+	}
+
+	if (di->flags.vbus_drop_end)
+		queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
+
+	return 0;
+}
+
+static int ab8500_charger_suspend(struct platform_device *pdev,
+	pm_message_t state)
+{
+	struct ab8500_charger *di = platform_get_drvdata(pdev);
+
+	/* Cancel any pending jobs */
+	cancel_delayed_work(&di->check_hw_failure_work);
+	cancel_delayed_work(&di->vbus_drop_end_work);
+
+	flush_delayed_work(&di->attach_work);
+	flush_delayed_work(&di->usb_charger_attached_work);
+	flush_delayed_work(&di->ac_charger_attached_work);
+	flush_delayed_work(&di->check_usbchgnotok_work);
+	flush_delayed_work(&di->check_vbat_work);
+	flush_delayed_work(&di->kick_wd_work);
+
+	flush_work(&di->usb_link_status_work);
+	flush_work(&di->ac_work);
+	flush_work(&di->detect_usb_type_work);
+
+	if (atomic_read(&di->current_stepping_sessions))
+		return -EAGAIN;
+
+	return 0;
+}
+#else
+#define ab8500_charger_suspend      NULL
+#define ab8500_charger_resume       NULL
+#endif
+
+static struct notifier_block charger_nb = {
+	.notifier_call = ab8500_external_charger_prepare,
+};
+
+static int ab8500_charger_remove(struct platform_device *pdev)
+{
+	struct ab8500_charger *di = platform_get_drvdata(pdev);
+	int i, irq, ret;
+
+	/* Disable AC charging */
+	ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
+
+	/* Disable USB charging */
+	ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
+
+	/* Disable interrupts */
+	for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
+		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
+		free_irq(irq, di);
+	}
+
+	/* Backup battery voltage and current disable */
+	ret = abx500_mask_and_set_register_interruptible(di->dev,
+		AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
+	if (ret < 0)
+		dev_err(di->dev, "%s mask and set failed\n", __func__);
+
+	usb_unregister_notifier(di->usb_phy, &di->nb);
+	usb_put_phy(di->usb_phy);
+
+	/* Delete the work queue */
+	destroy_workqueue(di->charger_wq);
+
+	/* Unregister external charger enable notifier */
+	if (!di->ac_chg.enabled)
+		blocking_notifier_chain_unregister(
+			&charger_notifier_list, &charger_nb);
+
+	flush_scheduled_work();
+	if (di->usb_chg.enabled)
+		power_supply_unregister(di->usb_chg.psy);
+
+	if (di->ac_chg.enabled && !di->ac_chg.external)
+		power_supply_unregister(di->ac_chg.psy);
+
+	return 0;
+}
+
+static char *supply_interface[] = {
+	"ab8500_chargalg",
+	"ab8500_fg",
+	"ab8500_btemp",
+};
+
+static const struct power_supply_desc ab8500_ac_chg_desc = {
+	.name		= "ab8500_ac",
+	.type		= POWER_SUPPLY_TYPE_MAINS,
+	.properties	= ab8500_charger_ac_props,
+	.num_properties	= ARRAY_SIZE(ab8500_charger_ac_props),
+	.get_property	= ab8500_charger_ac_get_property,
+};
+
+static const struct power_supply_desc ab8500_usb_chg_desc = {
+	.name		= "ab8500_usb",
+	.type		= POWER_SUPPLY_TYPE_USB,
+	.properties	= ab8500_charger_usb_props,
+	.num_properties	= ARRAY_SIZE(ab8500_charger_usb_props),
+	.get_property	= ab8500_charger_usb_get_property,
+};
+
+static int ab8500_charger_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct abx500_bm_data *plat = pdev->dev.platform_data;
+	struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
+	struct ab8500_charger *di;
+	int irq, i, charger_status, ret = 0, ch_stat;
+
+	di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
+	if (!di) {
+		dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
+		return -ENOMEM;
+	}
+
+	if (!plat) {
+		dev_err(&pdev->dev, "no battery management data supplied\n");
+		return -EINVAL;
+	}
+	di->bm = plat;
+
+	if (np) {
+		ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get battery information\n");
+			return ret;
+		}
+		di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
+	} else
+		di->autopower_cfg = false;
+
+	/* get parent data */
+	di->dev = &pdev->dev;
+	di->parent = dev_get_drvdata(pdev->dev.parent);
+	di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
+
+	/* initialize lock */
+	spin_lock_init(&di->usb_state.usb_lock);
+	mutex_init(&di->usb_ipt_crnt_lock);
+
+	di->autopower = false;
+	di->invalid_charger_detect_state = 0;
+
+	/* AC and USB supply config */
+	ac_psy_cfg.supplied_to = supply_interface;
+	ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
+	ac_psy_cfg.drv_data = &di->ac_chg;
+	usb_psy_cfg.supplied_to = supply_interface;
+	usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
+	usb_psy_cfg.drv_data = &di->usb_chg;
+
+	/* AC supply */
+	/* ux500_charger sub-class */
+	di->ac_chg.ops.enable = &ab8500_charger_ac_en;
+	di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
+	di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
+	di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
+	di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
+		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
+	di->ac_chg.max_out_curr =
+		di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
+	di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
+	di->ac_chg.enabled = di->bm->ac_enabled;
+	di->ac_chg.external = false;
+
+	/*notifier for external charger enabling*/
+	if (!di->ac_chg.enabled)
+		blocking_notifier_chain_register(
+			&charger_notifier_list, &charger_nb);
+
+	/* USB supply */
+	/* ux500_charger sub-class */
+	di->usb_chg.ops.enable = &ab8500_charger_usb_en;
+	di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
+	di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
+	di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
+	di->usb_chg.ops.pp_enable = &ab8540_charger_power_path_enable;
+	di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable;
+	di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
+		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
+	di->usb_chg.max_out_curr =
+		di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
+	di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
+	di->usb_chg.enabled = di->bm->usb_enabled;
+	di->usb_chg.external = false;
+	di->usb_chg.power_path = di->bm->usb_power_path;
+	di->usb_state.usb_current = -1;
+
+	/* Create a work queue for the charger */
+	di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
+						 WQ_MEM_RECLAIM);
+	if (di->charger_wq == NULL) {
+		dev_err(di->dev, "failed to create work queue\n");
+		return -ENOMEM;
+	}
+
+	mutex_init(&di->charger_attached_mutex);
+
+	/* Init work for HW failure check */
+	INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
+		ab8500_charger_check_hw_failure_work);
+	INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
+		ab8500_charger_check_usbchargernotok_work);
+
+	INIT_DELAYED_WORK(&di->ac_charger_attached_work,
+			  ab8500_charger_ac_attached_work);
+	INIT_DELAYED_WORK(&di->usb_charger_attached_work,
+			  ab8500_charger_usb_attached_work);
+
+	/*
+	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
+	 * logic. That means we have to continously kick the charger
+	 * watchdog even when no charger is connected. This is only
+	 * valid once the AC charger has been enabled. This is
+	 * a bug that is not handled by the algorithm and the
+	 * watchdog have to be kicked by the charger driver
+	 * when the AC charger is disabled
+	 */
+	INIT_DEFERRABLE_WORK(&di->kick_wd_work,
+		ab8500_charger_kick_watchdog_work);
+
+	INIT_DEFERRABLE_WORK(&di->check_vbat_work,
+		ab8500_charger_check_vbat_work);
+
+	INIT_DELAYED_WORK(&di->attach_work,
+		ab8500_charger_usb_link_attach_work);
+
+	INIT_DELAYED_WORK(&di->usb_state_changed_work,
+		ab8500_charger_usb_state_changed_work);
+
+	INIT_DELAYED_WORK(&di->vbus_drop_end_work,
+		ab8500_charger_vbus_drop_end_work);
+
+	/* Init work for charger detection */
+	INIT_WORK(&di->usb_link_status_work,
+		ab8500_charger_usb_link_status_work);
+	INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
+	INIT_WORK(&di->detect_usb_type_work,
+		ab8500_charger_detect_usb_type_work);
+
+	/* Init work for checking HW status */
+	INIT_WORK(&di->check_main_thermal_prot_work,
+		ab8500_charger_check_main_thermal_prot_work);
+	INIT_WORK(&di->check_usb_thermal_prot_work,
+		ab8500_charger_check_usb_thermal_prot_work);
+
+	/*
+	 * VDD ADC supply needs to be enabled from this driver when there
+	 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
+	 * interrupts during charging
+	 */
+	di->regu = devm_regulator_get(di->dev, "vddadc");
+	if (IS_ERR(di->regu)) {
+		ret = PTR_ERR(di->regu);
+		dev_err(di->dev, "failed to get vddadc regulator\n");
+		goto free_charger_wq;
+	}
+
+
+	/* Initialize OVV, and other registers */
+	ret = ab8500_charger_init_hw_registers(di);
+	if (ret) {
+		dev_err(di->dev, "failed to initialize ABB registers\n");
+		goto free_charger_wq;
+	}
+
+	/* Register AC charger class */
+	if (di->ac_chg.enabled) {
+		di->ac_chg.psy = power_supply_register(di->dev,
+						       &ab8500_ac_chg_desc,
+						       &ac_psy_cfg);
+		if (IS_ERR(di->ac_chg.psy)) {
+			dev_err(di->dev, "failed to register AC charger\n");
+			ret = PTR_ERR(di->ac_chg.psy);
+			goto free_charger_wq;
+		}
+	}
+
+	/* Register USB charger class */
+	if (di->usb_chg.enabled) {
+		di->usb_chg.psy = power_supply_register(di->dev,
+							&ab8500_usb_chg_desc,
+							&usb_psy_cfg);
+		if (IS_ERR(di->usb_chg.psy)) {
+			dev_err(di->dev, "failed to register USB charger\n");
+			ret = PTR_ERR(di->usb_chg.psy);
+			goto free_ac;
+		}
+	}
+
+	di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
+	if (IS_ERR_OR_NULL(di->usb_phy)) {
+		dev_err(di->dev, "failed to get usb transceiver\n");
+		ret = -EINVAL;
+		goto free_usb;
+	}
+	di->nb.notifier_call = ab8500_charger_usb_notifier_call;
+	ret = usb_register_notifier(di->usb_phy, &di->nb);
+	if (ret) {
+		dev_err(di->dev, "failed to register usb notifier\n");
+		goto put_usb_phy;
+	}
+
+	/* Identify the connected charger types during startup */
+	charger_status = ab8500_charger_detect_chargers(di, true);
+	if (charger_status & AC_PW_CONN) {
+		di->ac.charger_connected = 1;
+		di->ac_conn = true;
+		ab8500_power_supply_changed(di, di->ac_chg.psy);
+		sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
+	}
+
+	if (charger_status & USB_PW_CONN) {
+		di->vbus_detected = true;
+		di->vbus_detected_start = true;
+		queue_work(di->charger_wq,
+			&di->detect_usb_type_work);
+	}
+
+	/* Register interrupts */
+	for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
+		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
+		ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
+			IRQF_SHARED | IRQF_NO_SUSPEND,
+			ab8500_charger_irq[i].name, di);
+
+		if (ret != 0) {
+			dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
+				, ab8500_charger_irq[i].name, irq, ret);
+			goto free_irq;
+		}
+		dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
+			ab8500_charger_irq[i].name, irq, ret);
+	}
+
+	platform_set_drvdata(pdev, di);
+
+	mutex_lock(&di->charger_attached_mutex);
+
+	ch_stat = ab8500_charger_detect_chargers(di, false);
+
+	if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
+		if (is_ab8500(di->parent))
+			queue_delayed_work(di->charger_wq,
+					   &di->ac_charger_attached_work,
+					   HZ);
+	}
+	if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
+		if (is_ab8500(di->parent))
+			queue_delayed_work(di->charger_wq,
+					   &di->usb_charger_attached_work,
+					   HZ);
+	}
+
+	mutex_unlock(&di->charger_attached_mutex);
+
+	return ret;
+
+free_irq:
+	usb_unregister_notifier(di->usb_phy, &di->nb);
+
+	/* We also have to free all successfully registered irqs */
+	for (i = i - 1; i >= 0; i--) {
+		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
+		free_irq(irq, di);
+	}
+put_usb_phy:
+	usb_put_phy(di->usb_phy);
+free_usb:
+	if (di->usb_chg.enabled)
+		power_supply_unregister(di->usb_chg.psy);
+free_ac:
+	if (di->ac_chg.enabled)
+		power_supply_unregister(di->ac_chg.psy);
+free_charger_wq:
+	destroy_workqueue(di->charger_wq);
+	return ret;
+}
+
+static const struct of_device_id ab8500_charger_match[] = {
+	{ .compatible = "stericsson,ab8500-charger", },
+	{ },
+};
+
+static struct platform_driver ab8500_charger_driver = {
+	.probe = ab8500_charger_probe,
+	.remove = ab8500_charger_remove,
+	.suspend = ab8500_charger_suspend,
+	.resume = ab8500_charger_resume,
+	.driver = {
+		.name = "ab8500-charger",
+		.of_match_table = ab8500_charger_match,
+	},
+};
+
+static int __init ab8500_charger_init(void)
+{
+	return platform_driver_register(&ab8500_charger_driver);
+}
+
+static void __exit ab8500_charger_exit(void)
+{
+	platform_driver_unregister(&ab8500_charger_driver);
+}
+
+subsys_initcall_sync(ab8500_charger_init);
+module_exit(ab8500_charger_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
+MODULE_ALIAS("platform:ab8500-charger");
+MODULE_DESCRIPTION("AB8500 charger management driver");