[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / power / max8998_charger.c

/*
 * max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
 *
 *  Copyright (C) 2009-2010 Samsung Electronics
 *  MyungJoo Ham <myungjoo.ham@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>

struct max8998_battery_data {
	struct device *dev;
	struct max8998_dev *iodev;
	struct power_supply battery;
};

static enum power_supply_property max8998_battery_props[] = {
	POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
	POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
};

/* Note that the charger control is done by a current regulator "CHARGER" */
static int max8998_battery_get_property(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct max8998_battery_data *max8998 = container_of(psy,
			struct max8998_battery_data, battery);
	struct i2c_client *i2c = max8998->iodev->i2c;
	int ret;
	u8 reg;

	switch (psp) {
	case POWER_SUPPLY_PROP_PRESENT:
		ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
		if (ret)
			return ret;
		if (reg & (1 << 4))
			val->intval = 0;
		else
			val->intval = 1;
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
		if (ret)
			return ret;
		if (reg & (1 << 3))
			val->intval = 0;
		else
			val->intval = 1;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int max8998_battery_probe(struct platform_device *pdev)
{
	struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
	struct max8998_battery_data *max8998;
	struct i2c_client *i2c;
	int ret = 0;

	if (!pdata) {
		dev_err(pdev->dev.parent, "No platform init data supplied\n");
		return -ENODEV;
	}

	max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
				GFP_KERNEL);
	if (!max8998)
		return -ENOMEM;

	max8998->dev = &pdev->dev;
	max8998->iodev = iodev;
	platform_set_drvdata(pdev, max8998);
	i2c = max8998->iodev->i2c;

	/* Setup "End of Charge" */
	/* If EOC value equals 0,
	 * remain value set from bootloader or default value */
	if (pdata->eoc >= 10 && pdata->eoc <= 45) {
		max8998_update_reg(i2c, MAX8998_REG_CHGR1,
				(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
	} else if (pdata->eoc == 0) {
		dev_dbg(max8998->dev,
			"EOC value not set: leave it unchanged.\n");
	} else {
		dev_err(max8998->dev, "Invalid EOC value\n");
		ret = -EINVAL;
		goto err;
	}

	/* Setup Charge Restart Level */
	switch (pdata->restart) {
	case 100:
		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
		break;
	case 150:
		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
		break;
	case 200:
		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
		break;
	case -1:
		max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
		break;
	case 0:
		dev_dbg(max8998->dev,
			"Restart Level not set: leave it unchanged.\n");
		break;
	default:
		dev_err(max8998->dev, "Invalid Restart Level\n");
		ret = -EINVAL;
		goto err;
	}

	/* Setup Charge Full Timeout */
	switch (pdata->timeout) {
	case 5:
		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
		break;
	case 6:
		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
		break;
	case 7:
		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
		break;
	case -1:
		max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
		break;
	case 0:
		dev_dbg(max8998->dev,
			"Full Timeout not set: leave it unchanged.\n");
		break;
	default:
		dev_err(max8998->dev, "Invalid Full Timeout value\n");
		ret = -EINVAL;
		goto err;
	}

	max8998->battery.name = "max8998_pmic";
	max8998->battery.type = POWER_SUPPLY_TYPE_BATTERY;
	max8998->battery.get_property = max8998_battery_get_property;
	max8998->battery.properties = max8998_battery_props;
	max8998->battery.num_properties = ARRAY_SIZE(max8998_battery_props);

	ret = power_supply_register(max8998->dev, &max8998->battery);
	if (ret) {
		dev_err(max8998->dev, "failed: power supply register\n");
		goto err;
	}

	return 0;
err:
	return ret;
}

static int max8998_battery_remove(struct platform_device *pdev)
{
	struct max8998_battery_data *max8998 = platform_get_drvdata(pdev);

	power_supply_unregister(&max8998->battery);

	return 0;
}

static const struct platform_device_id max8998_battery_id[] = {
	{ "max8998-battery", TYPE_MAX8998 },
	{ }
};

static struct platform_driver max8998_battery_driver = {
	.driver = {
		.name = "max8998-battery",
		.owner = THIS_MODULE,
	},
	.probe = max8998_battery_probe,
	.remove = max8998_battery_remove,
	.id_table = max8998_battery_id,
};

module_platform_driver(max8998_battery_driver);

MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:max8998-battery");
Commit	Line	Data
bb4ce970 DK	1	/*
	2	* max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
	3	*
	4	* Copyright (C) 2009-2010 Samsung Electronics
	5	* MyungJoo Ham <myungjoo.ham@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/err.h>
d555ab6b	23	#include <linux/module.h>
bb4ce970 DK	24	#include <linux/slab.h>
	25	#include <linux/platform_device.h>
	26	#include <linux/power_supply.h>
	27	#include <linux/mfd/max8998.h>
	28	#include <linux/mfd/max8998-private.h>
	29
	30	struct max8998_battery_data {
	31	struct device *dev;
	32	struct max8998_dev *iodev;
	33	struct power_supply battery;
	34	};
	35
	36	static enum power_supply_property max8998_battery_props[] = {
	37	POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
	38	POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
	39	};
	40
	41	/* Note that the charger control is done by a current regulator "CHARGER" */
	42	static int max8998_battery_get_property(struct power_supply *psy,
	43	enum power_supply_property psp,
	44	union power_supply_propval *val)
	45	{
	46	struct max8998_battery_data *max8998 = container_of(psy,
	47	struct max8998_battery_data, battery);
	48	struct i2c_client *i2c = max8998->iodev->i2c;
	49	int ret;
	50	u8 reg;
	51
	52	switch (psp) {
	53	case POWER_SUPPLY_PROP_PRESENT:
	54	ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
	55	if (ret)
	56	return ret;
	57	if (reg & (1 << 4))
	58	val->intval = 0;
	59	else
	60	val->intval = 1;
	61	break;
	62	case POWER_SUPPLY_PROP_ONLINE:
	63	ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, &reg);
	64	if (ret)
	65	return ret;
	66	if (reg & (1 << 3))
	67	val->intval = 0;
	68	else
	69	val->intval = 1;
	70	break;
	71	default:
	72	return -EINVAL;
	73	}
	74
	75	return 0;
	76	}
	77
c8afa640	78	static int max8998_battery_probe(struct platform_device *pdev)
bb4ce970 DK	79	{
	80	struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	81	struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
	82	struct max8998_battery_data *max8998;
	83	struct i2c_client *i2c;
	84	int ret = 0;
	85
	86	if (!pdata) {
	87	dev_err(pdev->dev.parent, "No platform init data supplied\n");
	88	return -ENODEV;
	89	}
	90
acfbf47a JH	91	max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
acfbf47a JH	92	GFP_KERNEL);
bb4ce970 DK	93	if (!max8998)
	94	return -ENOMEM;
	95
	96	max8998->dev = &pdev->dev;
	97	max8998->iodev = iodev;
	98	platform_set_drvdata(pdev, max8998);
	99	i2c = max8998->iodev->i2c;
	100
	101	/* Setup "End of Charge" */
	102	/* If EOC value equals 0,
	103	* remain value set from bootloader or default value */
	104	if (pdata->eoc >= 10 && pdata->eoc <= 45) {
	105	max8998_update_reg(i2c, MAX8998_REG_CHGR1,
	106	(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
	107	} else if (pdata->eoc == 0) {
	108	dev_dbg(max8998->dev,
	109	"EOC value not set: leave it unchanged.\n");
	110	} else {
	111	dev_err(max8998->dev, "Invalid EOC value\n");
	112	ret = -EINVAL;
	113	goto err;
	114	}
	115
	116	/* Setup Charge Restart Level */
	117	switch (pdata->restart) {
	118	case 100:
	119	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
	120	break;
	121	case 150:
	122	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
	123	break;
	124	case 200:
	125	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
	126	break;
	127	case -1:
	128	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
	129	break;
	130	case 0:
	131	dev_dbg(max8998->dev,
	132	"Restart Level not set: leave it unchanged.\n");
	133	break;
	134	default:
	135	dev_err(max8998->dev, "Invalid Restart Level\n");
	136	ret = -EINVAL;
	137	goto err;
	138	}
	139
	140	/* Setup Charge Full Timeout */
	141	switch (pdata->timeout) {
	142	case 5:
	143	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
	144	break;
	145	case 6:
	146	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
	147	break;
	148	case 7:
	149	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
	150	break;
	151	case -1:
	152	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
	153	break;
	154	case 0:
	155	dev_dbg(max8998->dev,
	156	"Full Timeout not set: leave it unchanged.\n");
45d116ec	157	break;
bb4ce970 DK	158	default:
	159	dev_err(max8998->dev, "Invalid Full Timeout value\n");
	160	ret = -EINVAL;
	161	goto err;
	162	}
	163
	164	max8998->battery.name = "max8998_pmic";
	165	max8998->battery.type = POWER_SUPPLY_TYPE_BATTERY;
	166	max8998->battery.get_property = max8998_battery_get_property;
	167	max8998->battery.properties = max8998_battery_props;
	168	max8998->battery.num_properties = ARRAY_SIZE(max8998_battery_props);
	169
	170	ret = power_supply_register(max8998->dev, &max8998->battery);
	171	if (ret) {
	172	dev_err(max8998->dev, "failed: power supply register\n");
	173	goto err;
	174	}
	175
	176	return 0;
	177	err:
bb4ce970 DK	178	return ret;
	179	}
	180
415ec69f	181	static int max8998_battery_remove(struct platform_device *pdev)
bb4ce970 DK	182	{
	183	struct max8998_battery_data *max8998 = platform_get_drvdata(pdev);
	184
	185	power_supply_unregister(&max8998->battery);
bb4ce970 DK	186
	187	return 0;
	188	}
	189
	190	static const struct platform_device_id max8998_battery_id[] = {
	191	{ "max8998-battery", TYPE_MAX8998 },
c03bfabb	192	{ }
bb4ce970 DK	193	};
	194
	195	static struct platform_driver max8998_battery_driver = {
	196	.driver = {
	197	.name = "max8998-battery",
	198	.owner = THIS_MODULE,
	199	},
	200	.probe = max8998_battery_probe,
28ea73f4	201	.remove = max8998_battery_remove,
bb4ce970 DK	202	.id_table = max8998_battery_id,
	203	};
	204
300bac7f	205	module_platform_driver(max8998_battery_driver);
bb4ce970 DK	206
	207	MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
	208	MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
	209	MODULE_LICENSE("GPL");
	210	MODULE_ALIAS("platform:max8998-battery");