[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 __devinit 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 = kzalloc(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");
	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:
	kfree(max8998);
	return ret;
}

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

	power_supply_unregister(&max8998->battery);
	kfree(max8998);

	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 = __devexit_p(max8998_battery_remove),
	.id_table = max8998_battery_id,
};

static int __init max8998_battery_init(void)
{
	return platform_driver_register(&max8998_battery_driver);
}
module_init(max8998_battery_init);

static void __exit max8998_battery_cleanup(void)
{
	platform_driver_unregister(&max8998_battery_driver);
}
module_exit(max8998_battery_cleanup);

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
	78	static __devinit int max8998_battery_probe(struct platform_device *pdev)
	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
91	max8998 = kzalloc(sizeof(struct max8998_battery_data), GFP_KERNEL);
92	if (!max8998)
93	return -ENOMEM;
94
95	max8998->dev = &pdev->dev;
96	max8998->iodev = iodev;
97	platform_set_drvdata(pdev, max8998);
98	i2c = max8998->iodev->i2c;
99
100	/* Setup "End of Charge" */
101	/* If EOC value equals 0,
102	* remain value set from bootloader or default value */
103	if (pdata->eoc >= 10 && pdata->eoc <= 45) {
104	max8998_update_reg(i2c, MAX8998_REG_CHGR1,
105	(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
106	} else if (pdata->eoc == 0) {
107	dev_dbg(max8998->dev,
108	"EOC value not set: leave it unchanged.\n");
109	} else {
110	dev_err(max8998->dev, "Invalid EOC value\n");
111	ret = -EINVAL;
112	goto err;
113	}
114
115	/* Setup Charge Restart Level */
116	switch (pdata->restart) {
117	case 100:
118	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
119	break;
120	case 150:
121	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
122	break;
123	case 200:
124	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
125	break;
126	case -1:
127	max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
128	break;
129	case 0:
130	dev_dbg(max8998->dev,
131	"Restart Level not set: leave it unchanged.\n");
132	break;
133	default:
134	dev_err(max8998->dev, "Invalid Restart Level\n");
135	ret = -EINVAL;
136	goto err;
137	}
138
139	/* Setup Charge Full Timeout */
140	switch (pdata->timeout) {
141	case 5:
142	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
143	break;
144	case 6:
145	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
146	break;
147	case 7:
148	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
149	break;
150	case -1:
151	max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
152	break;
153	case 0:
154	dev_dbg(max8998->dev,
155	"Full Timeout not set: leave it unchanged.\n");
156	default:
157	dev_err(max8998->dev, "Invalid Full Timeout value\n");
158	ret = -EINVAL;
159	goto err;
160	}
161
162	max8998->battery.name = "max8998_pmic";
163	max8998->battery.type = POWER_SUPPLY_TYPE_BATTERY;
164	max8998->battery.get_property = max8998_battery_get_property;
165	max8998->battery.properties = max8998_battery_props;
166	max8998->battery.num_properties = ARRAY_SIZE(max8998_battery_props);
167
168	ret = power_supply_register(max8998->dev, &max8998->battery);
169	if (ret) {
170	dev_err(max8998->dev, "failed: power supply register\n");
171	goto err;
172	}
173
174	return 0;
175	err:
176	kfree(max8998);
177	return ret;
178	}
179
180	static int __devexit max8998_battery_remove(struct platform_device *pdev)
181	{
182	struct max8998_battery_data *max8998 = platform_get_drvdata(pdev);
183
184	power_supply_unregister(&max8998->battery);
185	kfree(max8998);
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,
	201	.remove = __devexit_p(max8998_battery_remove),
	202	.id_table = max8998_battery_id,
	203	};
	204
	205	static int __init max8998_battery_init(void)
	206	{
	207	return platform_driver_register(&max8998_battery_driver);
	208	}
	209	module_init(max8998_battery_init);
	210
	211	static void __exit max8998_battery_cleanup(void)
	212	{
	213	platform_driver_unregister(&max8998_battery_driver);
	214	}
	215	module_exit(max8998_battery_cleanup);
	216
	217	MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
	218	MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
	219	MODULE_LICENSE("GPL");
	220	MODULE_ALIAS("platform:max8998-battery");