drivers/staging/nvec/nvec_power.c - kernel/mindspeed - Git at Google

 /*
  * nvec_power: power supply driver for a NVIDIA compliant embedded controller
  *
  * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
  *
  * Authors:  Ilya Petrov <ilya.muromec@gmail.com>
  *           Marc Dietrich <marvin24@gmx.de>
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  */

 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/power_supply.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>

 #include "nvec.h"

 struct nvec_power {
 	struct notifier_block notifier;
 	struct delayed_work poller;
 	struct nvec_chip *nvec;
 	int on;
 	int bat_present;
 	int bat_status;
 	int bat_voltage_now;
 	int bat_current_now;
 	int bat_current_avg;
 	int time_remain;
 	int charge_full_design;
 	int charge_last_full;
 	int critical_capacity;
 	int capacity_remain;
 	int bat_temperature;
 	int bat_cap;
 	int bat_type_enum;
 	char bat_manu[30];
 	char bat_model[30];
 	char bat_type[30];
 };

 enum {
 	SLOT_STATUS,
 	VOLTAGE,
 	TIME_REMAINING,
 	CURRENT,
 	AVERAGE_CURRENT,
 	AVERAGING_TIME_INTERVAL,
 	CAPACITY_REMAINING,
 	LAST_FULL_CHARGE_CAPACITY,
 	DESIGN_CAPACITY,
 	CRITICAL_CAPACITY,
 	TEMPERATURE,
 	MANUFACTURER,
 	MODEL,
 	TYPE,
 };

 enum {
 	AC,
 	BAT,
 };

 struct bat_response {
 	u8 event_type;
 	u8 length;
 	u8 sub_type;
 	u8 status;
 	/* payload */
 	union {
 		char plc[30];
 		u16 plu;
 		s16 pls;
 	};
 };

 static struct power_supply nvec_bat_psy;
 static struct power_supply nvec_psy;

 static int nvec_power_notifier(struct notifier_block *nb,
 			       unsigned long event_type, void *data)
 {
 	struct nvec_power *power =
 	    container_of(nb, struct nvec_power, notifier);
 	struct bat_response *res = (struct bat_response *)data;

 	if (event_type != NVEC_SYS)
 		return NOTIFY_DONE;

 	if (res->sub_type == 0) {
 		if (power->on != res->plu) {
 			power->on = res->plu;
 			power_supply_changed(&nvec_psy);
 		}
 		return NOTIFY_STOP;
 	}
 	return NOTIFY_OK;
 }

 static const int bat_init[] = {
 	LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
 	MANUFACTURER, MODEL, TYPE,
 };

 static void get_bat_mfg_data(struct nvec_power *power)
 {
 	int i;
 	char buf[] = { '\x02', '\x00' };

 	for (i = 0; i < ARRAY_SIZE(bat_init); i++) {
 		buf[1] = bat_init[i];
 		nvec_write_async(power->nvec, buf, 2);
 	}
 }

 static int nvec_power_bat_notifier(struct notifier_block *nb,
 				   unsigned long event_type, void *data)
 {
 	struct nvec_power *power =
 	    container_of(nb, struct nvec_power, notifier);
 	struct bat_response *res = (struct bat_response *)data;
 	int status_changed = 0;

 	if (event_type != NVEC_BAT)
 		return NOTIFY_DONE;

 	switch (res->sub_type) {
 	case SLOT_STATUS:
 		if (res->plc[0] & 1) {
 			if (power->bat_present == 0) {
 				status_changed = 1;
 				get_bat_mfg_data(power);
 			}

 			power->bat_present = 1;

 			switch ((res->plc[0] >> 1) & 3) {
 			case 0:
 				power->bat_status =
 				    POWER_SUPPLY_STATUS_NOT_CHARGING;
 				break;
 			case 1:
 				power->bat_status =
 				    POWER_SUPPLY_STATUS_CHARGING;
 				break;
 			case 2:
 				power->bat_status =
 				    POWER_SUPPLY_STATUS_DISCHARGING;
 				break;
 			default:
 				power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
 			}
 		} else {
 			if (power->bat_present == 1)
 				status_changed = 1;

 			power->bat_present = 0;
 			power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
 		}
 		power->bat_cap = res->plc[1];
 		if (status_changed)
 			power_supply_changed(&nvec_bat_psy);
 		break;
 	case VOLTAGE:
 		power->bat_voltage_now = res->plu * 1000;
 		break;
 	case TIME_REMAINING:
 		power->time_remain = res->plu * 3600;
 		break;
 	case CURRENT:
 		power->bat_current_now = res->pls * 1000;
 		break;
 	case AVERAGE_CURRENT:
 		power->bat_current_avg = res->pls * 1000;
 		break;
 	case CAPACITY_REMAINING:
 		power->capacity_remain = res->plu * 1000;
 		break;
 	case LAST_FULL_CHARGE_CAPACITY:
 		power->charge_last_full = res->plu * 1000;
 		break;
 	case DESIGN_CAPACITY:
 		power->charge_full_design = res->plu * 1000;
 		break;
 	case CRITICAL_CAPACITY:
 		power->critical_capacity = res->plu * 1000;
 		break;
 	case TEMPERATURE:
 		power->bat_temperature = res->plu - 2732;
 		break;
 	case MANUFACTURER:
 		memcpy(power->bat_manu, &res->plc, res->length - 2);
 		power->bat_model[res->length - 2] = '\0';
 		break;
 	case MODEL:
 		memcpy(power->bat_model, &res->plc, res->length - 2);
 		power->bat_model[res->length - 2] = '\0';
 		break;
 	case TYPE:
 		memcpy(power->bat_type, &res->plc, res->length - 2);
 		power->bat_type[res->length - 2] = '\0';
 		/* this differs a little from the spec
 		   fill in more if you find some */
 		if (!strncmp(power->bat_type, "Li", 30))
 			power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
 		else
 			power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 		break;
 	default:
 		return NOTIFY_STOP;
 	}

 	return NOTIFY_STOP;
 }

 static int nvec_power_get_property(struct power_supply *psy,
 				   enum power_supply_property psp,
 				   union power_supply_propval *val)
 {
 	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
 	switch (psp) {
 	case POWER_SUPPLY_PROP_ONLINE:
 		val->intval = power->on;
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static int nvec_battery_get_property(struct power_supply *psy,
 				     enum power_supply_property psp,
 				     union power_supply_propval *val)
 {
 	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);

 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
 		val->intval = power->bat_status;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
 		val->intval = power->bat_cap;
 		break;
 	case POWER_SUPPLY_PROP_PRESENT:
 		val->intval = power->bat_present;
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 		val->intval = power->bat_voltage_now;
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 		val->intval = power->bat_current_now;
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
 		val->intval = power->bat_current_avg;
 		break;
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
 		val->intval = power->time_remain;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 		val->intval = power->charge_full_design;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL:
 		val->intval = power->charge_last_full;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
 		val->intval = power->critical_capacity;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_NOW:
 		val->intval = power->capacity_remain;
 		break;
 	case POWER_SUPPLY_PROP_TEMP:
 		val->intval = power->bat_temperature;
 		break;
 	case POWER_SUPPLY_PROP_MANUFACTURER:
 		val->strval = power->bat_manu;
 		break;
 	case POWER_SUPPLY_PROP_MODEL_NAME:
 		val->strval = power->bat_model;
 		break;
 	case POWER_SUPPLY_PROP_TECHNOLOGY:
 		val->intval = power->bat_type_enum;
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static enum power_supply_property nvec_power_props[] = {
 	POWER_SUPPLY_PROP_ONLINE,
 };

 static enum power_supply_property nvec_battery_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_PRESENT,
 	POWER_SUPPLY_PROP_CAPACITY,
 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 	POWER_SUPPLY_PROP_CURRENT_NOW,
 #ifdef EC_FULL_DIAG
 	POWER_SUPPLY_PROP_CURRENT_AVG,
 	POWER_SUPPLY_PROP_TEMP,
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
 #endif
 	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 	POWER_SUPPLY_PROP_CHARGE_FULL,
 	POWER_SUPPLY_PROP_CHARGE_EMPTY,
 	POWER_SUPPLY_PROP_CHARGE_NOW,
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_TECHNOLOGY,
 };

 static char *nvec_power_supplied_to[] = {
 	"battery",
 };

 static struct power_supply nvec_bat_psy = {
 	.name = "battery",
 	.type = POWER_SUPPLY_TYPE_BATTERY,
 	.properties = nvec_battery_props,
 	.num_properties = ARRAY_SIZE(nvec_battery_props),
 	.get_property = nvec_battery_get_property,
 };

 static struct power_supply nvec_psy = {
 	.name = "ac",
 	.type = POWER_SUPPLY_TYPE_MAINS,
 	.supplied_to = nvec_power_supplied_to,
 	.num_supplicants = ARRAY_SIZE(nvec_power_supplied_to),
 	.properties = nvec_power_props,
 	.num_properties = ARRAY_SIZE(nvec_power_props),
 	.get_property = nvec_power_get_property,
 };

 static int counter;
 static int const bat_iter[] = {
 	SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
 #ifdef EC_FULL_DIAG
 	AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
 #endif
 };

 static void nvec_power_poll(struct work_struct *work)
 {
 	char buf[] = { '\x01', '\x00' };
 	struct nvec_power *power = container_of(work, struct nvec_power,
 						poller.work);

 	if (counter >= ARRAY_SIZE(bat_iter))
 		counter = 0;

 /* AC status via sys req */
 	nvec_write_async(power->nvec, buf, 2);
 	msleep(100);

 /* select a battery request function via round robin
    doing it all at once seems to overload the power supply */
 	buf[0] = '\x02';	/* battery */
 	buf[1] = bat_iter[counter++];
 	nvec_write_async(power->nvec, buf, 2);

 	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
 };

 static int __devinit nvec_power_probe(struct platform_device *pdev)
 {
 	struct power_supply *psy;
 	struct nvec_power *power =
 	    kzalloc(sizeof(struct nvec_power), GFP_NOWAIT);
 	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);

 	dev_set_drvdata(&pdev->dev, power);
 	power->nvec = nvec;

 	switch (pdev->id) {
 	case AC:
 		psy = &nvec_psy;

 		power->notifier.notifier_call = nvec_power_notifier;

 		INIT_DELAYED_WORK(&power->poller, nvec_power_poll);
 		schedule_delayed_work(&power->poller, msecs_to_jiffies(5000));
 		break;
 	case BAT:
 		psy = &nvec_bat_psy;

 		power->notifier.notifier_call = nvec_power_bat_notifier;
 		break;
 	default:
 		kfree(power);
 		return -ENODEV;
 	}

 	nvec_register_notifier(nvec, &power->notifier, NVEC_SYS);

 	if (pdev->id == BAT)
 		get_bat_mfg_data(power);

 	return power_supply_register(&pdev->dev, psy);
 }

 static struct platform_driver nvec_power_driver = {
 	.probe = nvec_power_probe,
 	.driver = {
 		   .name = "nvec-power",
 		   .owner = THIS_MODULE,
 		   }
 };

 static int __init nvec_power_init(void)
 {
 	return platform_driver_register(&nvec_power_driver);
 }

 module_init(nvec_power_init);

 MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("NVEC battery and AC driver");
 MODULE_ALIAS("platform:nvec-power");
	/*
	* nvec_power: power supply driver for a NVIDIA compliant embedded controller
	*
	* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
	*
	* Authors: Ilya Petrov <ilya.muromec@gmail.com>
	* Marc Dietrich <marvin24@gmx.de>
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*
	*/

	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/err.h>
	#include <linux/power_supply.h>
	#include <linux/slab.h>
	#include <linux/workqueue.h>
	#include <linux/delay.h>

	#include "nvec.h"

	struct nvec_power {
	struct notifier_block notifier;
	struct delayed_work poller;
	struct nvec_chip *nvec;
	int on;
	int bat_present;
	int bat_status;
	int bat_voltage_now;
	int bat_current_now;
	int bat_current_avg;
	int time_remain;
	int charge_full_design;
	int charge_last_full;
	int critical_capacity;
	int capacity_remain;
	int bat_temperature;
	int bat_cap;
	int bat_type_enum;
	char bat_manu[30];
	char bat_model[30];
	char bat_type[30];
	};

	enum {
	SLOT_STATUS,
	VOLTAGE,
	TIME_REMAINING,
	CURRENT,
	AVERAGE_CURRENT,
	AVERAGING_TIME_INTERVAL,
	CAPACITY_REMAINING,
	LAST_FULL_CHARGE_CAPACITY,
	DESIGN_CAPACITY,
	CRITICAL_CAPACITY,
	TEMPERATURE,
	MANUFACTURER,
	MODEL,
	TYPE,
	};

	enum {
	AC,
	BAT,
	};

	struct bat_response {
	u8 event_type;
	u8 length;
	u8 sub_type;
	u8 status;
	/* payload */
	union {
	char plc[30];
	u16 plu;
	s16 pls;
	};
	};

	static struct power_supply nvec_bat_psy;
	static struct power_supply nvec_psy;

	static int nvec_power_notifier(struct notifier_block *nb,
	unsigned long event_type, void *data)
	{
	struct nvec_power *power =
	container_of(nb, struct nvec_power, notifier);
	struct bat_response res = (struct bat_response )data;

	if (event_type != NVEC_SYS)
	return NOTIFY_DONE;

	if (res->sub_type == 0) {
	if (power->on != res->plu) {
	power->on = res->plu;
	power_supply_changed(&nvec_psy);
	}
	return NOTIFY_STOP;
	}
	return NOTIFY_OK;
	}

	static const int bat_init[] = {
	LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
	MANUFACTURER, MODEL, TYPE,
	};

	static void get_bat_mfg_data(struct nvec_power *power)
	{
	int i;
	char buf[] = { '\x02', '\x00' };

	for (i = 0; i < ARRAY_SIZE(bat_init); i++) {
	buf[1] = bat_init[i];
	nvec_write_async(power->nvec, buf, 2);
	}
	}

	static int nvec_power_bat_notifier(struct notifier_block *nb,
	unsigned long event_type, void *data)
	{
	struct nvec_power *power =
	container_of(nb, struct nvec_power, notifier);
	struct bat_response res = (struct bat_response )data;
	int status_changed = 0;

	if (event_type != NVEC_BAT)
	return NOTIFY_DONE;

	switch (res->sub_type) {
	case SLOT_STATUS:
	if (res->plc[0] & 1) {
	if (power->bat_present == 0) {
	status_changed = 1;
	get_bat_mfg_data(power);
	}

	power->bat_present = 1;

	switch ((res->plc[0] >> 1) & 3) {
	case 0:
	power->bat_status =
	POWER_SUPPLY_STATUS_NOT_CHARGING;
	break;
	case 1:
	power->bat_status =
	POWER_SUPPLY_STATUS_CHARGING;
	break;
	case 2:
	power->bat_status =
	POWER_SUPPLY_STATUS_DISCHARGING;
	break;
	default:
	power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
	}
	} else {
	if (power->bat_present == 1)
	status_changed = 1;

	power->bat_present = 0;
	power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
	}
	power->bat_cap = res->plc[1];
	if (status_changed)
	power_supply_changed(&nvec_bat_psy);
	break;
	case VOLTAGE:
	power->bat_voltage_now = res->plu * 1000;
	break;
	case TIME_REMAINING:
	power->time_remain = res->plu * 3600;
	break;
	case CURRENT:
	power->bat_current_now = res->pls * 1000;
	break;
	case AVERAGE_CURRENT:
	power->bat_current_avg = res->pls * 1000;
	break;
	case CAPACITY_REMAINING:
	power->capacity_remain = res->plu * 1000;
	break;
	case LAST_FULL_CHARGE_CAPACITY:
	power->charge_last_full = res->plu * 1000;
	break;
	case DESIGN_CAPACITY:
	power->charge_full_design = res->plu * 1000;
	break;
	case CRITICAL_CAPACITY:
	power->critical_capacity = res->plu * 1000;
	break;
	case TEMPERATURE:
	power->bat_temperature = res->plu - 2732;
	break;
	case MANUFACTURER:
	memcpy(power->bat_manu, &res->plc, res->length - 2);
	power->bat_model[res->length - 2] = '\0';
	break;
	case MODEL:
	memcpy(power->bat_model, &res->plc, res->length - 2);
	power->bat_model[res->length - 2] = '\0';
	break;
	case TYPE:
	memcpy(power->bat_type, &res->plc, res->length - 2);
	power->bat_type[res->length - 2] = '\0';
	/* this differs a little from the spec
	fill in more if you find some */
	if (!strncmp(power->bat_type, "Li", 30))
	power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
	else
	power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
	break;
	default:
	return NOTIFY_STOP;
	}

	return NOTIFY_STOP;
	}

	static int nvec_power_get_property(struct power_supply *psy,
	enum power_supply_property psp,
	union power_supply_propval *val)
	{
	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
	val->intval = power->on;
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static int nvec_battery_get_property(struct power_supply *psy,
	enum power_supply_property psp,
	union power_supply_propval *val)
	{
	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
	val->intval = power->bat_status;
	break;
	case POWER_SUPPLY_PROP_CAPACITY:
	val->intval = power->bat_cap;
	break;
	case POWER_SUPPLY_PROP_PRESENT:
	val->intval = power->bat_present;
	break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	val->intval = power->bat_voltage_now;
	break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
	val->intval = power->bat_current_now;
	break;
	case POWER_SUPPLY_PROP_CURRENT_AVG:
	val->intval = power->bat_current_avg;
	break;
	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
	val->intval = power->time_remain;
	break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	val->intval = power->charge_full_design;
	break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
	val->intval = power->charge_last_full;
	break;
	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
	val->intval = power->critical_capacity;
	break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
	val->intval = power->capacity_remain;
	break;
	case POWER_SUPPLY_PROP_TEMP:
	val->intval = power->bat_temperature;
	break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
	val->strval = power->bat_manu;
	break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
	val->strval = power->bat_model;
	break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
	val->intval = power->bat_type_enum;
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	static enum power_supply_property nvec_power_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
	};

	static enum power_supply_property nvec_battery_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
	#ifdef EC_FULL_DIAG
	POWER_SUPPLY_PROP_CURRENT_AVG,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
	#endif
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_EMPTY,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_MANUFACTURER,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	};

	static char *nvec_power_supplied_to[] = {
	"battery",
	};

	static struct power_supply nvec_bat_psy = {
	.name = "battery",
	.type = POWER_SUPPLY_TYPE_BATTERY,
	.properties = nvec_battery_props,
	.num_properties = ARRAY_SIZE(nvec_battery_props),
	.get_property = nvec_battery_get_property,
	};

	static struct power_supply nvec_psy = {
	.name = "ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.supplied_to = nvec_power_supplied_to,
	.num_supplicants = ARRAY_SIZE(nvec_power_supplied_to),
	.properties = nvec_power_props,
	.num_properties = ARRAY_SIZE(nvec_power_props),
	.get_property = nvec_power_get_property,
	};

	static int counter;
	static int const bat_iter[] = {
	SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
	#ifdef EC_FULL_DIAG
	AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
	#endif
	};

	static void nvec_power_poll(struct work_struct *work)
	{
	char buf[] = { '\x01', '\x00' };
	struct nvec_power *power = container_of(work, struct nvec_power,
	poller.work);

	if (counter >= ARRAY_SIZE(bat_iter))
	counter = 0;

	/* AC status via sys req */
	nvec_write_async(power->nvec, buf, 2);
	msleep(100);

	/* select a battery request function via round robin
	doing it all at once seems to overload the power supply */
	buf[0] = '\x02'; /* battery */
	buf[1] = bat_iter[counter++];
	nvec_write_async(power->nvec, buf, 2);

	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
	};

	static int __devinit nvec_power_probe(struct platform_device *pdev)
	{
	struct power_supply *psy;
	struct nvec_power *power =
	kzalloc(sizeof(struct nvec_power), GFP_NOWAIT);
	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);

	dev_set_drvdata(&pdev->dev, power);
	power->nvec = nvec;

	switch (pdev->id) {
	case AC:
	psy = &nvec_psy;

	power->notifier.notifier_call = nvec_power_notifier;

	INIT_DELAYED_WORK(&power->poller, nvec_power_poll);
	schedule_delayed_work(&power->poller, msecs_to_jiffies(5000));
	break;
	case BAT:
	psy = &nvec_bat_psy;

	power->notifier.notifier_call = nvec_power_bat_notifier;
	break;
	default:
	kfree(power);
	return -ENODEV;
	}

	nvec_register_notifier(nvec, &power->notifier, NVEC_SYS);

	if (pdev->id == BAT)
	get_bat_mfg_data(power);

	return power_supply_register(&pdev->dev, psy);
	}

	static struct platform_driver nvec_power_driver = {
	.probe = nvec_power_probe,
	.driver = {
	.name = "nvec-power",
	.owner = THIS_MODULE,
	}
	};

	static int __init nvec_power_init(void)
	{
	return platform_driver_register(&nvec_power_driver);
	}

	module_init(nvec_power_init);

	MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("NVEC battery and AC driver");
	MODULE_ALIAS("platform:nvec-power");