[deliverable/linux.git] / drivers / mfd / tps65090.c

/*
 * Core driver for TI TPS65090 PMIC family
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.

 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.

 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65090.h>
#include <linux/err.h>

#define NUM_INT_REG 2
#define TOTAL_NUM_REG 0x18

/* interrupt status registers */
#define TPS65090_INT_STS	0x0
#define TPS65090_INT_STS2	0x1

/* interrupt mask registers */
#define TPS65090_INT_MSK	0x2
#define TPS65090_INT_MSK2	0x3

#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE		1
#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE		2
#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE		3
#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE	4
#define TPS65090_INT1_MASK_CHARGING_COMPLETE		5
#define TPS65090_INT1_MASK_OVERLOAD_DCDC1		6
#define TPS65090_INT1_MASK_OVERLOAD_DCDC2		7
#define TPS65090_INT2_MASK_OVERLOAD_DCDC3		0
#define TPS65090_INT2_MASK_OVERLOAD_FET1		1
#define TPS65090_INT2_MASK_OVERLOAD_FET2		2
#define TPS65090_INT2_MASK_OVERLOAD_FET3		3
#define TPS65090_INT2_MASK_OVERLOAD_FET4		4
#define TPS65090_INT2_MASK_OVERLOAD_FET5		5
#define TPS65090_INT2_MASK_OVERLOAD_FET6		6
#define TPS65090_INT2_MASK_OVERLOAD_FET7		7

static struct mfd_cell tps65090s[] = {
	{
		.name = "tps65090-pmic",
	},
	{
		.name = "tps65090-charger",
	},
};

static const struct regmap_irq tps65090_irqs[] = {
	/* INT1 IRQs*/
	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
			.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
	},
	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
			.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
	},
	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
			.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
	},
	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
			.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
	},
	[TPS65090_IRQ_CHARGING_COMPLETE] = {
			.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
	},
	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
			.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
	},
	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
			.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
	},
	/* INT2 IRQs*/
	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
	},
	[TPS65090_IRQ_OVERLOAD_FET1] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
	},
	[TPS65090_IRQ_OVERLOAD_FET2] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
	},
	[TPS65090_IRQ_OVERLOAD_FET3] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
	},
	[TPS65090_IRQ_OVERLOAD_FET4] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
	},
	[TPS65090_IRQ_OVERLOAD_FET5] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
	},
	[TPS65090_IRQ_OVERLOAD_FET6] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
	},
	[TPS65090_IRQ_OVERLOAD_FET7] = {
			.reg_offset = 1,
			.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
	},
};

static struct regmap_irq_chip tps65090_irq_chip = {
	.name = "tps65090",
	.irqs = tps65090_irqs,
	.num_irqs = ARRAY_SIZE(tps65090_irqs),
	.num_regs = NUM_INT_REG,
	.status_base = TPS65090_INT_STS,
	.mask_base = TPS65090_INT_MSK,
	.mask_invert = true,
};

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
		return true;
	else
		return false;
}

static const struct regmap_config tps65090_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TOTAL_NUM_REG,
	.num_reg_defaults_raw = TOTAL_NUM_REG,
	.cache_type = REGCACHE_RBTREE,
	.volatile_reg = is_volatile_reg,
};

static int tps65090_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct tps65090_platform_data *pdata = client->dev.platform_data;
	struct tps65090 *tps65090;
	int ret;

	if (!pdata) {
		dev_err(&client->dev, "tps65090 requires platform data\n");
		return -EINVAL;
	}

	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
	if (!tps65090) {
		dev_err(&client->dev, "mem alloc for tps65090 failed\n");
		return -ENOMEM;
	}

	tps65090->dev = &client->dev;
	i2c_set_clientdata(client, tps65090);

	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
	if (IS_ERR(tps65090->rmap)) {
		ret = PTR_ERR(tps65090->rmap);
		dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
		return ret;
	}

	if (client->irq) {
		ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
			IRQF_ONESHOT | IRQF_TRIGGER_LOW, pdata->irq_base,
			&tps65090_irq_chip, &tps65090->irq_data);
			if (ret) {
				dev_err(&client->dev,
					"IRQ init failed with err: %d\n", ret);
			return ret;
		}
	}

	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
		ARRAY_SIZE(tps65090s), NULL,
		regmap_irq_chip_get_base(tps65090->irq_data), NULL);
	if (ret) {
		dev_err(&client->dev, "add mfd devices failed with err: %d\n",
			ret);
		goto err_irq_exit;
	}

	return 0;

err_irq_exit:
	if (client->irq)
		regmap_del_irq_chip(client->irq, tps65090->irq_data);
	return ret;
}

static int tps65090_i2c_remove(struct i2c_client *client)
{
	struct tps65090 *tps65090 = i2c_get_clientdata(client);

	mfd_remove_devices(tps65090->dev);
	if (client->irq)
		regmap_del_irq_chip(client->irq, tps65090->irq_data);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int tps65090_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	if (client->irq)
		disable_irq(client->irq);
	return 0;
}

static int tps65090_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	if (client->irq)
		enable_irq(client->irq);
	return 0;
}
#endif

static const struct dev_pm_ops tps65090_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
};

static const struct i2c_device_id tps65090_id_table[] = {
	{ "tps65090", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, tps65090_id_table);

static struct i2c_driver tps65090_driver = {
	.driver	= {
		.name	= "tps65090",
		.owner	= THIS_MODULE,
		.pm	= &tps65090_pm_ops,
	},
	.probe		= tps65090_i2c_probe,
	.remove		= tps65090_i2c_remove,
	.id_table	= tps65090_id_table,
};

static int __init tps65090_init(void)
{
	return i2c_add_driver(&tps65090_driver);
}
subsys_initcall(tps65090_init);

static void __exit tps65090_exit(void)
{
	i2c_del_driver(&tps65090_driver);
}
module_exit(tps65090_exit);

MODULE_DESCRIPTION("TPS65090 core driver");
MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
3c33be06 VB	1	/*
	2	* Core driver for TI TPS65090 PMIC family
	3	*
	4	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
	5
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include <linux/interrupt.h>
	20	#include <linux/irq.h>
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/mutex.h>
	24	#include <linux/slab.h>
	25	#include <linux/i2c.h>
	26	#include <linux/mfd/core.h>
	27	#include <linux/mfd/tps65090.h>
3c33be06 VB	28	#include <linux/err.h>
	29
	30	#define NUM_INT_REG 2
	31	#define TOTAL_NUM_REG 0x18
	32
	33	/* interrupt status registers */
	34	#define TPS65090_INT_STS 0x0
	35	#define TPS65090_INT_STS2 0x1
	36
	37	/* interrupt mask registers */
	38	#define TPS65090_INT_MSK 0x2
	39	#define TPS65090_INT_MSK2 0x3
	40
759f2598 LD	41	#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
	42	#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
	43	#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
	44	#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
	45	#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
	46	#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
	47	#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
	48	#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
	49	#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
	50	#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
	51	#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
	52	#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
	53	#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
	54	#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
	55	#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
3c33be06 VB	56
	57	static struct mfd_cell tps65090s[] = {
	58	{
b7e53786	59	.name = "tps65090-pmic",
3c33be06 VB	60	},
3c33be06 VB	61	{
e2e8ffc9	62	.name = "tps65090-charger",
3c33be06 VB	63	},
	64	};
	65
759f2598 LD	66	static const struct regmap_irq tps65090_irqs[] = {
	67	/* INT1 IRQs*/
	68	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
	69	.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
	70	},
	71	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
	72	.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
	73	},
	74	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
	75	.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
	76	},
	77	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
	78	.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
	79	},
	80	[TPS65090_IRQ_CHARGING_COMPLETE] = {
	81	.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
	82	},
	83	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
	84	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
	85	},
	86	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
	87	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
	88	},
	89	/* INT2 IRQs*/
	90	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
	91	.reg_offset = 1,
	92	.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
	93	},
	94	[TPS65090_IRQ_OVERLOAD_FET1] = {
	95	.reg_offset = 1,
	96	.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
	97	},
	98	[TPS65090_IRQ_OVERLOAD_FET2] = {
	99	.reg_offset = 1,
	100	.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
	101	},
	102	[TPS65090_IRQ_OVERLOAD_FET3] = {
	103	.reg_offset = 1,
	104	.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
	105	},
	106	[TPS65090_IRQ_OVERLOAD_FET4] = {
	107	.reg_offset = 1,
	108	.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
	109	},
	110	[TPS65090_IRQ_OVERLOAD_FET5] = {
	111	.reg_offset = 1,
	112	.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
	113	},
	114	[TPS65090_IRQ_OVERLOAD_FET6] = {
	115	.reg_offset = 1,
	116	.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
	117	},
	118	[TPS65090_IRQ_OVERLOAD_FET7] = {
	119	.reg_offset = 1,
	120	.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
	121	},
	122	};
3c33be06	123
759f2598 LD	124	static struct regmap_irq_chip tps65090_irq_chip = {
	125	.name = "tps65090",
	126	.irqs = tps65090_irqs,
	127	.num_irqs = ARRAY_SIZE(tps65090_irqs),
	128	.num_regs = NUM_INT_REG,
	129	.status_base = TPS65090_INT_STS,
	130	.mask_base = TPS65090_INT_MSK,
	131	.mask_invert = true,
	132	};
3c33be06 VB	133
	134	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	135	{
759f2598	136	if ((reg == TPS65090_INT_STS) \|\| (reg == TPS65090_INT_STS2))
3c33be06 VB	137	return true;
	138	else
	139	return false;
	140	}
	141
	142	static const struct regmap_config tps65090_regmap_config = {
	143	.reg_bits = 8,
	144	.val_bits = 8,
	145	.max_register = TOTAL_NUM_REG,
	146	.num_reg_defaults_raw = TOTAL_NUM_REG,
	147	.cache_type = REGCACHE_RBTREE,
	148	.volatile_reg = is_volatile_reg,
	149	};
	150
f791be49	151	static int tps65090_i2c_probe(struct i2c_client *client,
3c33be06 VB	152	const struct i2c_device_id *id)
	153	{
	154	struct tps65090_platform_data *pdata = client->dev.platform_data;
	155	struct tps65090 *tps65090;
	156	int ret;
	157
	158	if (!pdata) {
	159	dev_err(&client->dev, "tps65090 requires platform data\n");
	160	return -EINVAL;
	161	}
	162
e8e6f047 LD	163	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
	164	if (!tps65090) {
	165	dev_err(&client->dev, "mem alloc for tps65090 failed\n");
3c33be06	166	return -ENOMEM;
e8e6f047	167	}
3c33be06	168
3c33be06 VB	169	tps65090->dev = &client->dev;
	170	i2c_set_clientdata(client, tps65090);
	171
3863db3e	172	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
3c33be06	173	if (IS_ERR(tps65090->rmap)) {
b683a0a6 AL	174	ret = PTR_ERR(tps65090->rmap);
b683a0a6 AL	175	dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
759f2598 LD	176	return ret;
	177	}
	178
	179	if (client->irq) {
	180	ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
	181	IRQF_ONESHOT \| IRQF_TRIGGER_LOW, pdata->irq_base,
	182	&tps65090_irq_chip, &tps65090->irq_data);
	183	if (ret) {
	184	dev_err(&client->dev,
	185	"IRQ init failed with err: %d\n", ret);
	186	return ret;
	187	}
b683a0a6	188	}
3c33be06 VB	189
3c33be06 VB	190	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
759f2598 LD	191	ARRAY_SIZE(tps65090s), NULL,
759f2598 LD	192	regmap_irq_chip_get_base(tps65090->irq_data), NULL);
3c33be06 VB	193	if (ret) {
	194	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	195	ret);
1d88f7a0	196	goto err_irq_exit;
3c33be06 VB	197	}
	198
	199	return 0;
	200
3c33be06 VB	201	err_irq_exit:
3c33be06 VB	202	if (client->irq)
759f2598	203	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	204	return ret;
	205	}
	206
4740f73f	207	static int tps65090_i2c_remove(struct i2c_client *client)
3c33be06 VB	208	{
	209	struct tps65090 *tps65090 = i2c_get_clientdata(client);
	210
	211	mfd_remove_devices(tps65090->dev);
3c33be06	212	if (client->irq)
759f2598	213	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	214
	215	return 0;
	216	}
	217
1ca5513a	218	#ifdef CONFIG_PM_SLEEP
b6c9eeef	219	static int tps65090_suspend(struct device *dev)
3c33be06	220	{
b6c9eeef	221	struct i2c_client *client = to_i2c_client(dev);
3c33be06 VB	222	if (client->irq)
	223	disable_irq(client->irq);
	224	return 0;
	225	}
	226
b6c9eeef	227	static int tps65090_resume(struct device *dev)
3c33be06	228	{
b6c9eeef	229	struct i2c_client *client = to_i2c_client(dev);
3c33be06 VB	230	if (client->irq)
	231	enable_irq(client->irq);
	232	return 0;
	233	}
	234	#endif
	235
b6c9eeef MB	236	static const struct dev_pm_ops tps65090_pm_ops = {
	237	SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
	238	};
	239
3c33be06 VB	240	static const struct i2c_device_id tps65090_id_table[] = {
	241	{ "tps65090", 0 },
	242	{ },
	243	};
	244	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
	245
	246	static struct i2c_driver tps65090_driver = {
	247	.driver = {
	248	.name = "tps65090",
	249	.owner = THIS_MODULE,
b6c9eeef	250	.pm = &tps65090_pm_ops,
3c33be06 VB	251	},
3c33be06 VB	252	.probe = tps65090_i2c_probe,
84449216	253	.remove = tps65090_i2c_remove,
3c33be06 VB	254	.id_table = tps65090_id_table,
	255	};
	256
	257	static int __init tps65090_init(void)
	258	{
	259	return i2c_add_driver(&tps65090_driver);
	260	}
	261	subsys_initcall(tps65090_init);
	262
	263	static void __exit tps65090_exit(void)
	264	{
	265	i2c_del_driver(&tps65090_driver);
	266	}
	267	module_exit(tps65090_exit);
	268
	269	MODULE_DESCRIPTION("TPS65090 core driver");
	270	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	271	MODULE_LICENSE("GPL v2");