[linux-2.6-block.git] / drivers / power / generic-adc-battery.c

/*
 * Generic battery driver code using IIO
 * Copyright (C) 2012, Anish Kumar <anish198519851985@gmail.com>
 * based on jz4740-battery.c
 * based on s3c_adc_battery.c
 *
 * 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/interrupt.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#include <linux/iio/types.h>
#include <linux/power/generic-adc-battery.h>

#define JITTER_DEFAULT 10 /* hope 10ms is enough */

enum gab_chan_type {
	GAB_VOLTAGE = 0,
	GAB_CURRENT,
	GAB_POWER,
	GAB_MAX_CHAN_TYPE
};

/*
 * gab_chan_name suggests the standard channel names for commonly used
 * channel types.
 */
static const char *const gab_chan_name[] = {
	[GAB_VOLTAGE]	= "voltage",
	[GAB_CURRENT]	= "current",
	[GAB_POWER]		= "power",
};

struct gab {
	struct power_supply		*psy;
	struct power_supply_desc	psy_desc;
	struct iio_channel	*channel[GAB_MAX_CHAN_TYPE];
	struct gab_platform_data	*pdata;
	struct delayed_work bat_work;
	int	level;
	int	status;
	bool cable_plugged;
};

static struct gab *to_generic_bat(struct power_supply *psy)
{
	return power_supply_get_drvdata(psy);
}

static void gab_ext_power_changed(struct power_supply *psy)
{
	struct gab *adc_bat = to_generic_bat(psy);

	schedule_delayed_work(&adc_bat->bat_work, msecs_to_jiffies(0));
}

static const enum power_supply_property gab_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_MODEL_NAME,
};

/*
 * This properties are set based on the received platform data and this
 * should correspond one-to-one with enum chan_type.
 */
static const enum power_supply_property gab_dyn_props[] = {
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
	POWER_SUPPLY_PROP_POWER_NOW,
};

static bool gab_charge_finished(struct gab *adc_bat)
{
	struct gab_platform_data *pdata = adc_bat->pdata;
	bool ret = gpio_get_value(pdata->gpio_charge_finished);
	bool inv = pdata->gpio_inverted;

	if (!gpio_is_valid(pdata->gpio_charge_finished))
		return false;
	return ret ^ inv;
}

static int gab_get_status(struct gab *adc_bat)
{
	struct gab_platform_data *pdata = adc_bat->pdata;
	struct power_supply_info *bat_info;

	bat_info = &pdata->battery_info;
	if (adc_bat->level == bat_info->charge_full_design)
		return POWER_SUPPLY_STATUS_FULL;
	return adc_bat->status;
}

static enum gab_chan_type gab_prop_to_chan(enum power_supply_property psp)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_POWER_NOW:
		return GAB_POWER;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		return GAB_VOLTAGE;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		return GAB_CURRENT;
	default:
		WARN_ON(1);
		break;
	}
	return GAB_POWER;
}

static int read_channel(struct gab *adc_bat, enum power_supply_property psp,
		int *result)
{
	int ret;
	int chan_index;

	chan_index = gab_prop_to_chan(psp);
	ret = iio_read_channel_processed(adc_bat->channel[chan_index],
			result);
	if (ret < 0)
		pr_err("read channel error\n");
	return ret;
}

static int gab_get_property(struct power_supply *psy,
		enum power_supply_property psp, union power_supply_propval *val)
{
	struct gab *adc_bat;
	struct gab_platform_data *pdata;
	struct power_supply_info *bat_info;
	int result = 0;
	int ret = 0;

	adc_bat = to_generic_bat(psy);
	if (!adc_bat) {
		dev_err(&psy->dev, "no battery infos ?!\n");
		return -EINVAL;
	}
	pdata = adc_bat->pdata;
	bat_info = &pdata->battery_info;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = gab_get_status(adc_bat);
		break;
	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
		val->intval = 0;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		val->intval = pdata->cal_charge(result);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	case POWER_SUPPLY_PROP_CURRENT_NOW:
	case POWER_SUPPLY_PROP_POWER_NOW:
		ret = read_channel(adc_bat, psp, &result);
		if (ret < 0)
			goto err;
		val->intval = result;
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = bat_info->technology;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		val->intval = bat_info->voltage_min_design;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		val->intval = bat_info->voltage_max_design;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		val->intval = bat_info->charge_full_design;
		break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = bat_info->name;
		break;
	default:
		return -EINVAL;
	}
err:
	return ret;
}

static void gab_work(struct work_struct *work)
{
	struct gab *adc_bat;
	struct gab_platform_data *pdata;
	struct delayed_work *delayed_work;
	bool is_plugged;
	int status;

	delayed_work = to_delayed_work(work);
	adc_bat = container_of(delayed_work, struct gab, bat_work);
	pdata = adc_bat->pdata;
	status = adc_bat->status;

	is_plugged = power_supply_am_i_supplied(adc_bat->psy);
	adc_bat->cable_plugged = is_plugged;

	if (!is_plugged)
		adc_bat->status =  POWER_SUPPLY_STATUS_DISCHARGING;
	else if (gab_charge_finished(adc_bat))
		adc_bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
	else
		adc_bat->status = POWER_SUPPLY_STATUS_CHARGING;

	if (status != adc_bat->status)
		power_supply_changed(adc_bat->psy);
}

static irqreturn_t gab_charged(int irq, void *dev_id)
{
	struct gab *adc_bat = dev_id;
	struct gab_platform_data *pdata = adc_bat->pdata;
	int delay;

	delay = pdata->jitter_delay ? pdata->jitter_delay : JITTER_DEFAULT;
	schedule_delayed_work(&adc_bat->bat_work,
			msecs_to_jiffies(delay));
	return IRQ_HANDLED;
}

static int gab_probe(struct platform_device *pdev)
{
	struct gab *adc_bat;
	struct power_supply_desc *psy_desc;
	struct power_supply_config psy_cfg = {};
	struct gab_platform_data *pdata = pdev->dev.platform_data;
	enum power_supply_property *properties;
	int ret = 0;
	int chan;
	int index = 0;

	adc_bat = devm_kzalloc(&pdev->dev, sizeof(*adc_bat), GFP_KERNEL);
	if (!adc_bat) {
		dev_err(&pdev->dev, "failed to allocate memory\n");
		return -ENOMEM;
	}

	psy_cfg.drv_data = adc_bat;
	psy_desc = &adc_bat->psy_desc;
	psy_desc->name = pdata->battery_info.name;

	/* bootup default values for the battery */
	adc_bat->cable_plugged = false;
	adc_bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
	psy_desc->get_property = gab_get_property;
	psy_desc->external_power_changed = gab_ext_power_changed;
	adc_bat->pdata = pdata;

	/*
	 * copying the static properties and allocating extra memory for holding
	 * the extra configurable properties received from platform data.
	 */
	psy_desc->properties = kcalloc(ARRAY_SIZE(gab_props) +
					ARRAY_SIZE(gab_chan_name),
					sizeof(*psy_desc->properties),
					GFP_KERNEL);
	if (!psy_desc->properties) {
		ret = -ENOMEM;
		goto first_mem_fail;
	}

	memcpy(psy_desc->properties, gab_props, sizeof(gab_props));
	properties = (enum power_supply_property *)
			((char *)psy_desc->properties + sizeof(gab_props));

	/*
	 * getting channel from iio and copying the battery properties
	 * based on the channel supported by consumer device.
	 */
	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
		adc_bat->channel[chan] = iio_channel_get(&pdev->dev,
							 gab_chan_name[chan]);
		if (IS_ERR(adc_bat->channel[chan])) {
			ret = PTR_ERR(adc_bat->channel[chan]);
			adc_bat->channel[chan] = NULL;
		} else {
			/* copying properties for supported channels only */
			memcpy(properties + sizeof(*(psy_desc->properties)) * index,
					&gab_dyn_props[chan],
					sizeof(gab_dyn_props[chan]));
			index++;
		}
	}

	/* none of the channels are supported so let's bail out */
	if (index == 0) {
		ret = -ENODEV;
		goto second_mem_fail;
	}

	/*
	 * Total number of properties is equal to static properties
	 * plus the dynamic properties.Some properties may not be set
	 * as come channels may be not be supported by the device.So
	 * we need to take care of that.
	 */
	psy_desc->num_properties = ARRAY_SIZE(gab_props) + index;

	adc_bat->psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);
	if (IS_ERR(adc_bat->psy)) {
		ret = PTR_ERR(adc_bat->psy);
		goto err_reg_fail;
	}

	INIT_DELAYED_WORK(&adc_bat->bat_work, gab_work);

	if (gpio_is_valid(pdata->gpio_charge_finished)) {
		int irq;
		ret = gpio_request(pdata->gpio_charge_finished, "charged");
		if (ret)
			goto gpio_req_fail;

		irq = gpio_to_irq(pdata->gpio_charge_finished);
		ret = request_any_context_irq(irq, gab_charged,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"battery charged", adc_bat);
		if (ret < 0)
			goto err_gpio;
	}

	platform_set_drvdata(pdev, adc_bat);

	/* Schedule timer to check current status */
	schedule_delayed_work(&adc_bat->bat_work,
			msecs_to_jiffies(0));
	return 0;

err_gpio:
	gpio_free(pdata->gpio_charge_finished);
gpio_req_fail:
	power_supply_unregister(adc_bat->psy);
err_reg_fail:
	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
		if (adc_bat->channel[chan])
			iio_channel_release(adc_bat->channel[chan]);
	}
second_mem_fail:
	kfree(psy_desc->properties);
first_mem_fail:
	return ret;
}

static int gab_remove(struct platform_device *pdev)
{
	int chan;
	struct gab *adc_bat = platform_get_drvdata(pdev);
	struct gab_platform_data *pdata = adc_bat->pdata;

	power_supply_unregister(adc_bat->psy);

	if (gpio_is_valid(pdata->gpio_charge_finished)) {
		free_irq(gpio_to_irq(pdata->gpio_charge_finished), adc_bat);
		gpio_free(pdata->gpio_charge_finished);
	}

	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
		if (adc_bat->channel[chan])
			iio_channel_release(adc_bat->channel[chan]);
	}

	kfree(adc_bat->psy_desc.properties);
	cancel_delayed_work(&adc_bat->bat_work);
	return 0;
}

#ifdef CONFIG_PM
static int gab_suspend(struct device *dev)
{
	struct gab *adc_bat = dev_get_drvdata(dev);

	cancel_delayed_work_sync(&adc_bat->bat_work);
	adc_bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
	return 0;
}

static int gab_resume(struct device *dev)
{
	struct gab *adc_bat = dev_get_drvdata(dev);
	struct gab_platform_data *pdata = adc_bat->pdata;
	int delay;

	delay = pdata->jitter_delay ? pdata->jitter_delay : JITTER_DEFAULT;

	/* Schedule timer to check current status */
	schedule_delayed_work(&adc_bat->bat_work,
			msecs_to_jiffies(delay));
	return 0;
}

static const struct dev_pm_ops gab_pm_ops = {
	.suspend        = gab_suspend,
	.resume         = gab_resume,
};

#define GAB_PM_OPS       (&gab_pm_ops)
#else
#define GAB_PM_OPS       (NULL)
#endif

static struct platform_driver gab_driver = {
	.driver		= {
		.name	= "generic-adc-battery",
		.pm	= GAB_PM_OPS
	},
	.probe		= gab_probe,
	.remove		= gab_remove,
};
module_platform_driver(gab_driver);

MODULE_AUTHOR("anish kumar <anish198519851985@gmail.com>");
MODULE_DESCRIPTION("generic battery driver using IIO");
MODULE_LICENSE("GPL");
Commit	Line	Data
e60fea79	1	/*
	2	* Generic battery driver code using IIO
	3	* Copyright (C) 2012, Anish Kumar <anish198519851985@gmail.com>
	4	* based on jz4740-battery.c
	5	* based on s3c_adc_battery.c
	6	*
	7	* This file is subject to the terms and conditions of the GNU General Public
	8	* License. See the file COPYING in the main directory of this archive for
	9	* more details.
	10	*
	11	*/
	12	#include <linux/interrupt.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/power_supply.h>
	15	#include <linux/gpio.h>
	16	#include <linux/err.h>
	17	#include <linux/timer.h>
	18	#include <linux/jiffies.h>
	19	#include <linux/errno.h>
	20	#include <linux/init.h>
	21	#include <linux/module.h>
	22	#include <linux/slab.h>
	23	#include <linux/iio/consumer.h>
	24	#include <linux/iio/types.h>
	25	#include <linux/power/generic-adc-battery.h>
	26
	27	#define JITTER_DEFAULT 10 /* hope 10ms is enough */
	28
	29	enum gab_chan_type {
	30	GAB_VOLTAGE = 0,
	31	GAB_CURRENT,
	32	GAB_POWER,
	33	GAB_MAX_CHAN_TYPE
	34	};
	35
	36	/*
	37	* gab_chan_name suggests the standard channel names for commonly used
	38	* channel types.
	39	*/
	40	static const char *const gab_chan_name[] = {
	41	[GAB_VOLTAGE] = "voltage",
	42	[GAB_CURRENT] = "current",
	43	[GAB_POWER] = "power",
	44	};
	45
	46	struct gab {
297d716f KK	47	struct power_supply *psy;
297d716f KK	48	struct power_supply_desc psy_desc;
e60fea79	49	struct iio_channel *channel[GAB_MAX_CHAN_TYPE];
	50	struct gab_platform_data *pdata;
	51	struct delayed_work bat_work;
	52	int level;
	53	int status;
	54	bool cable_plugged;
	55	};
	56
	57	static struct gab to_generic_bat(struct power_supply psy)
	58	{
297d716f	59	return power_supply_get_drvdata(psy);
e60fea79	60	}
	61
	62	static void gab_ext_power_changed(struct power_supply *psy)
	63	{
	64	struct gab *adc_bat = to_generic_bat(psy);
	65
	66	schedule_delayed_work(&adc_bat->bat_work, msecs_to_jiffies(0));
	67	}
	68
	69	static const enum power_supply_property gab_props[] = {
	70	POWER_SUPPLY_PROP_STATUS,
	71	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	72	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
	73	POWER_SUPPLY_PROP_CHARGE_NOW,
	74	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	75	POWER_SUPPLY_PROP_CURRENT_NOW,
	76	POWER_SUPPLY_PROP_TECHNOLOGY,
	77	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	78	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	79	POWER_SUPPLY_PROP_MODEL_NAME,
	80	};
	81
	82	/*
	83	* This properties are set based on the received platform data and this
	84	* should correspond one-to-one with enum chan_type.
	85	*/
	86	static const enum power_supply_property gab_dyn_props[] = {
	87	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	88	POWER_SUPPLY_PROP_CURRENT_NOW,
	89	POWER_SUPPLY_PROP_POWER_NOW,
	90	};
	91
	92	static bool gab_charge_finished(struct gab *adc_bat)
	93	{
	94	struct gab_platform_data *pdata = adc_bat->pdata;
	95	bool ret = gpio_get_value(pdata->gpio_charge_finished);
	96	bool inv = pdata->gpio_inverted;
	97
	98	if (!gpio_is_valid(pdata->gpio_charge_finished))
	99	return false;
	100	return ret ^ inv;
	101	}
	102
	103	static int gab_get_status(struct gab *adc_bat)
	104	{
	105	struct gab_platform_data *pdata = adc_bat->pdata;
	106	struct power_supply_info *bat_info;
	107
	108	bat_info = &pdata->battery_info;
	109	if (adc_bat->level == bat_info->charge_full_design)
	110	return POWER_SUPPLY_STATUS_FULL;
	111	return adc_bat->status;
	112	}
	113
	114	static enum gab_chan_type gab_prop_to_chan(enum power_supply_property psp)
	115	{
	116	switch (psp) {
	117	case POWER_SUPPLY_PROP_POWER_NOW:
	118	return GAB_POWER;
	119	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	120	return GAB_VOLTAGE;
	121	case POWER_SUPPLY_PROP_CURRENT_NOW:
	122	return GAB_CURRENT;
	123	default:
124	WARN_ON(1);
125	break;
126	}
127	return GAB_POWER;
128	}
129
130	static int read_channel(struct gab *adc_bat, enum power_supply_property psp,
131	int *result)
132	{
133	int ret;
134	int chan_index;
135
136	chan_index = gab_prop_to_chan(psp);
137	ret = iio_read_channel_processed(adc_bat->channel[chan_index],
138	result);
139	if (ret < 0)
140	pr_err("read channel error\n");
141	return ret;
142	}
143
144	static int gab_get_property(struct power_supply *psy,
145	enum power_supply_property psp, union power_supply_propval *val)
146	{
147	struct gab *adc_bat;
148	struct gab_platform_data *pdata;
149	struct power_supply_info *bat_info;
150	int result = 0;
151	int ret = 0;
152
153	adc_bat = to_generic_bat(psy);
154	if (!adc_bat) {
297d716f	155	dev_err(&psy->dev, "no battery infos ?!\n");
e60fea79	156	return -EINVAL;
	157	}
	158	pdata = adc_bat->pdata;
	159	bat_info = &pdata->battery_info;
	160
	161	switch (psp) {
	162	case POWER_SUPPLY_PROP_STATUS:
0595439a	163	val->intval = gab_get_status(adc_bat);
e60fea79	164	break;
	165	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
	166	val->intval = 0;
	167	break;
	168	case POWER_SUPPLY_PROP_CHARGE_NOW:
	169	val->intval = pdata->cal_charge(result);
	170	break;
	171	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	172	case POWER_SUPPLY_PROP_CURRENT_NOW:
	173	case POWER_SUPPLY_PROP_POWER_NOW:
	174	ret = read_channel(adc_bat, psp, &result);
	175	if (ret < 0)
	176	goto err;
	177	val->intval = result;
	178	break;
	179	case POWER_SUPPLY_PROP_TECHNOLOGY:
	180	val->intval = bat_info->technology;
	181	break;
	182	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
	183	val->intval = bat_info->voltage_min_design;
	184	break;
	185	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	186	val->intval = bat_info->voltage_max_design;
	187	break;
	188	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	189	val->intval = bat_info->charge_full_design;
	190	break;
	191	case POWER_SUPPLY_PROP_MODEL_NAME:
	192	val->strval = bat_info->name;
	193	break;
	194	default:
	195	return -EINVAL;
	196	}
	197	err:
	198	return ret;
	199	}
	200
	201	static void gab_work(struct work_struct *work)
	202	{
	203	struct gab *adc_bat;
	204	struct gab_platform_data *pdata;
	205	struct delayed_work *delayed_work;
	206	bool is_plugged;
	207	int status;
	208
127d2868	209	delayed_work = to_delayed_work(work);
e60fea79	210	adc_bat = container_of(delayed_work, struct gab, bat_work);
	211	pdata = adc_bat->pdata;
	212	status = adc_bat->status;
	213
297d716f	214	is_plugged = power_supply_am_i_supplied(adc_bat->psy);
e60fea79	215	adc_bat->cable_plugged = is_plugged;
	216
	217	if (!is_plugged)
	218	adc_bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	219	else if (gab_charge_finished(adc_bat))
	220	adc_bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
	221	else
	222	adc_bat->status = POWER_SUPPLY_STATUS_CHARGING;
	223
	224	if (status != adc_bat->status)
297d716f	225	power_supply_changed(adc_bat->psy);
e60fea79	226	}
	227
	228	static irqreturn_t gab_charged(int irq, void *dev_id)
	229	{
	230	struct gab *adc_bat = dev_id;
	231	struct gab_platform_data *pdata = adc_bat->pdata;
	232	int delay;
	233
	234	delay = pdata->jitter_delay ? pdata->jitter_delay : JITTER_DEFAULT;
	235	schedule_delayed_work(&adc_bat->bat_work,
	236	msecs_to_jiffies(delay));
	237	return IRQ_HANDLED;
	238	}
	239
c8afa640	240	static int gab_probe(struct platform_device *pdev)
e60fea79	241	{
e60fea79	242	struct gab *adc_bat;
297d716f KK	243	struct power_supply_desc *psy_desc;
297d716f KK	244	struct power_supply_config psy_cfg = {};
e60fea79	245	struct gab_platform_data *pdata = pdev->dev.platform_data;
	246	enum power_supply_property *properties;
	247	int ret = 0;
	248	int chan;
	249	int index = 0;
	250
	251	adc_bat = devm_kzalloc(&pdev->dev, sizeof(*adc_bat), GFP_KERNEL);
	252	if (!adc_bat) {
	253	dev_err(&pdev->dev, "failed to allocate memory\n");
	254	return -ENOMEM;
	255	}
	256
297d716f KK	257	psy_cfg.drv_data = adc_bat;
	258	psy_desc = &adc_bat->psy_desc;
	259	psy_desc->name = pdata->battery_info.name;
e60fea79	260
	261	/* bootup default values for the battery */
	262	adc_bat->cable_plugged = false;
	263	adc_bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
297d716f KK	264	psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
	265	psy_desc->get_property = gab_get_property;
	266	psy_desc->external_power_changed = gab_ext_power_changed;
e60fea79	267	adc_bat->pdata = pdata;
e60fea79	268
e60fea79	269	/*
	270	* copying the static properties and allocating extra memory for holding
	271	* the extra configurable properties received from platform data.
	272	*/
297d716f	273	psy_desc->properties = kcalloc(ARRAY_SIZE(gab_props) +
e60fea79	274	ARRAY_SIZE(gab_chan_name),
297d716f KK	275	sizeof(*psy_desc->properties),
	276	GFP_KERNEL);
	277	if (!psy_desc->properties) {
e60fea79	278	ret = -ENOMEM;
	279	goto first_mem_fail;
	280	}
	281
297d716f	282	memcpy(psy_desc->properties, gab_props, sizeof(gab_props));
a77d60ae	283	properties = (enum power_supply_property *)
297d716f	284	((char *)psy_desc->properties + sizeof(gab_props));
e60fea79	285
	286	/*
	287	* getting channel from iio and copying the battery properties
	288	* based on the channel supported by consumer device.
	289	*/
	290	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
5aa57f0a GR	291	adc_bat->channel[chan] = iio_channel_get(&pdev->dev,
5aa57f0a GR	292	gab_chan_name[chan]);
e60fea79	293	if (IS_ERR(adc_bat->channel[chan])) {
e60fea79	294	ret = PTR_ERR(adc_bat->channel[chan]);
64d26f22	295	adc_bat->channel[chan] = NULL;
e60fea79	296	} else {
e60fea79	297	/* copying properties for supported channels only */
297d716f	298	memcpy(properties + sizeof((psy_desc->properties)) index,
e60fea79	299	&gab_dyn_props[chan],
	300	sizeof(gab_dyn_props[chan]));
	301	index++;
	302	}
	303	}
	304
	305	/* none of the channels are supported so let's bail out */
d211c6e8 AL	306	if (index == 0) {
d211c6e8 AL	307	ret = -ENODEV;
e60fea79	308	goto second_mem_fail;
d211c6e8	309	}
e60fea79	310
	311	/*
	312	* Total number of properties is equal to static properties
	313	* plus the dynamic properties.Some properties may not be set
	314	* as come channels may be not be supported by the device.So
	315	* we need to take care of that.
	316	*/
297d716f	317	psy_desc->num_properties = ARRAY_SIZE(gab_props) + index;
e60fea79	318
297d716f KK	319	adc_bat->psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);
	320	if (IS_ERR(adc_bat->psy)) {
	321	ret = PTR_ERR(adc_bat->psy);
e60fea79	322	goto err_reg_fail;
297d716f	323	}
e60fea79	324
	325	INIT_DELAYED_WORK(&adc_bat->bat_work, gab_work);
	326
	327	if (gpio_is_valid(pdata->gpio_charge_finished)) {
	328	int irq;
	329	ret = gpio_request(pdata->gpio_charge_finished, "charged");
	330	if (ret)
	331	goto gpio_req_fail;
	332
	333	irq = gpio_to_irq(pdata->gpio_charge_finished);
	334	ret = request_any_context_irq(irq, gab_charged,
	335	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	336	"battery charged", adc_bat);
a5af0922	337	if (ret < 0)
e60fea79	338	goto err_gpio;
	339	}
	340
	341	platform_set_drvdata(pdev, adc_bat);
	342
	343	/* Schedule timer to check current status */
	344	schedule_delayed_work(&adc_bat->bat_work,
	345	msecs_to_jiffies(0));
	346	return 0;
	347
	348	err_gpio:
	349	gpio_free(pdata->gpio_charge_finished);
	350	gpio_req_fail:
297d716f	351	power_supply_unregister(adc_bat->psy);
e60fea79	352	err_reg_fail:
64d26f22 DC	353	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
	354	if (adc_bat->channel[chan])
	355	iio_channel_release(adc_bat->channel[chan]);
	356	}
e60fea79	357	second_mem_fail:
297d716f	358	kfree(psy_desc->properties);
e60fea79	359	first_mem_fail:
	360	return ret;
	361	}
	362
415ec69f	363	static int gab_remove(struct platform_device *pdev)
e60fea79	364	{
	365	int chan;
	366	struct gab *adc_bat = platform_get_drvdata(pdev);
	367	struct gab_platform_data *pdata = adc_bat->pdata;
	368
297d716f	369	power_supply_unregister(adc_bat->psy);
e60fea79	370
	371	if (gpio_is_valid(pdata->gpio_charge_finished)) {
	372	free_irq(gpio_to_irq(pdata->gpio_charge_finished), adc_bat);
	373	gpio_free(pdata->gpio_charge_finished);
	374	}
	375
64d26f22 DC	376	for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
	377	if (adc_bat->channel[chan])
	378	iio_channel_release(adc_bat->channel[chan]);
	379	}
e60fea79	380
297d716f	381	kfree(adc_bat->psy_desc.properties);
e60fea79	382	cancel_delayed_work(&adc_bat->bat_work);
	383	return 0;
	384	}
	385
	386	#ifdef CONFIG_PM
	387	static int gab_suspend(struct device *dev)
	388	{
	389	struct gab *adc_bat = dev_get_drvdata(dev);
	390
	391	cancel_delayed_work_sync(&adc_bat->bat_work);
	392	adc_bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
	393	return 0;
	394	}
	395
	396	static int gab_resume(struct device *dev)
	397	{
	398	struct gab *adc_bat = dev_get_drvdata(dev);
	399	struct gab_platform_data *pdata = adc_bat->pdata;
	400	int delay;
	401
	402	delay = pdata->jitter_delay ? pdata->jitter_delay : JITTER_DEFAULT;
	403
	404	/* Schedule timer to check current status */
	405	schedule_delayed_work(&adc_bat->bat_work,
	406	msecs_to_jiffies(delay));
	407	return 0;
	408	}
	409
	410	static const struct dev_pm_ops gab_pm_ops = {
	411	.suspend = gab_suspend,
	412	.resume = gab_resume,
	413	};
	414
	415	#define GAB_PM_OPS (&gab_pm_ops)
	416	#else
	417	#define GAB_PM_OPS (NULL)
	418	#endif
	419
	420	static struct platform_driver gab_driver = {
	421	.driver = {
	422	.name = "generic-adc-battery",
e60fea79	423	.pm = GAB_PM_OPS
	424	},
	425	.probe = gab_probe,
28ea73f4	426	.remove = gab_remove,
e60fea79	427	};
	428	module_platform_driver(gab_driver);
	429
	430	MODULE_AUTHOR("anish kumar <anish198519851985@gmail.com>");
	431	MODULE_DESCRIPTION("generic battery driver using IIO");
	432	MODULE_LICENSE("GPL");