[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/of.h>
#include <linux/of_device.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 resource charger_resources[] = {
	{
		.start  = TPS65090_IRQ_VAC_STATUS_CHANGE,
		.end    = TPS65090_IRQ_VAC_STATUS_CHANGE,
		.flags  = IORESOURCE_IRQ,
	}
};

enum tps65090_cells {
	PMIC = 0,
	CHARGER = 1,
};

static struct mfd_cell tps65090s[] = {
	[PMIC] = {
		.name = "tps65090-pmic",
	},
	[CHARGER] = {
		.name = "tps65090-charger",
		.num_resources = ARRAY_SIZE(charger_resources),
		.resources = &charger_resources[0],
		.of_compatible = "ti,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,
};

#ifdef CONFIG_OF
static const struct of_device_id tps65090_of_match[] = {
	{ .compatible = "ti,tps65090",},
	{},
};
MODULE_DEVICE_TABLE(of, tps65090_of_match);
#endif

static int tps65090_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
	int irq_base = 0;
	struct tps65090 *tps65090;
	int ret;

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

	if (pdata)
		irq_base = pdata->irq_base;

	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, irq_base,
			&tps65090_irq_chip, &tps65090->irq_data);
			if (ret) {
				dev_err(&client->dev,
					"IRQ init failed with err: %d\n", ret);
			return ret;
		}
	} else {
		/* Don't tell children they have an IRQ that'll never fire */
		tps65090s[CHARGER].num_resources = 0;
	}

	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
		ARRAY_SIZE(tps65090s), NULL,
		0, regmap_irq_get_domain(tps65090->irq_data));
	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;
}

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,
		.of_match_table = of_match_ptr(tps65090_of_match),
	},
	.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>
40719314 LD	28	#include <linux/of.h>
40719314 LD	29	#include <linux/of_device.h>
3c33be06 VB	30	#include <linux/err.h>
	31
	32	#define NUM_INT_REG 2
	33	#define TOTAL_NUM_REG 0x18
	34
	35	/* interrupt status registers */
	36	#define TPS65090_INT_STS 0x0
	37	#define TPS65090_INT_STS2 0x1
	38
	39	/* interrupt mask registers */
	40	#define TPS65090_INT_MSK 0x2
	41	#define TPS65090_INT_MSK2 0x3
	42
759f2598 LD	43	#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
	44	#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
	45	#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
	46	#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
	47	#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
	48	#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
	49	#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
	50	#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
	51	#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
	52	#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
	53	#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
	54	#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
	55	#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
	56	#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
	57	#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
3c33be06	58
36c772e3 RK	59	static struct resource charger_resources[] = {
	60	{
	61	.start = TPS65090_IRQ_VAC_STATUS_CHANGE,
	62	.end = TPS65090_IRQ_VAC_STATUS_CHANGE,
	63	.flags = IORESOURCE_IRQ,
	64	}
	65	};
	66
7d811771 DA	67	enum tps65090_cells {
	68	PMIC = 0,
	69	CHARGER = 1,
	70	};
	71
	72	static struct mfd_cell tps65090s[] = {
	73	[PMIC] = {
b7e53786	74	.name = "tps65090-pmic",
3c33be06	75	},
7d811771	76	[CHARGER] = {
e2e8ffc9	77	.name = "tps65090-charger",
36c772e3 RK	78	.num_resources = ARRAY_SIZE(charger_resources),
36c772e3 RK	79	.resources = &charger_resources[0],
b50cf35b	80	.of_compatible = "ti,tps65090-charger",
3c33be06 VB	81	},
	82	};
	83
759f2598 LD	84	static const struct regmap_irq tps65090_irqs[] = {
	85	/* INT1 IRQs*/
	86	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
	87	.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
	88	},
	89	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
	90	.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
	91	},
	92	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
	93	.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
	94	},
	95	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
	96	.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
	97	},
	98	[TPS65090_IRQ_CHARGING_COMPLETE] = {
	99	.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
	100	},
	101	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
	102	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
	103	},
	104	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
	105	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
	106	},
	107	/* INT2 IRQs*/
	108	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
	109	.reg_offset = 1,
	110	.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
	111	},
	112	[TPS65090_IRQ_OVERLOAD_FET1] = {
	113	.reg_offset = 1,
	114	.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
	115	},
	116	[TPS65090_IRQ_OVERLOAD_FET2] = {
	117	.reg_offset = 1,
	118	.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
	119	},
	120	[TPS65090_IRQ_OVERLOAD_FET3] = {
	121	.reg_offset = 1,
	122	.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
	123	},
	124	[TPS65090_IRQ_OVERLOAD_FET4] = {
	125	.reg_offset = 1,
	126	.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
	127	},
	128	[TPS65090_IRQ_OVERLOAD_FET5] = {
	129	.reg_offset = 1,
	130	.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
	131	},
	132	[TPS65090_IRQ_OVERLOAD_FET6] = {
	133	.reg_offset = 1,
	134	.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
	135	},
	136	[TPS65090_IRQ_OVERLOAD_FET7] = {
	137	.reg_offset = 1,
	138	.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
	139	},
	140	};
3c33be06	141
759f2598 LD	142	static struct regmap_irq_chip tps65090_irq_chip = {
	143	.name = "tps65090",
	144	.irqs = tps65090_irqs,
	145	.num_irqs = ARRAY_SIZE(tps65090_irqs),
	146	.num_regs = NUM_INT_REG,
	147	.status_base = TPS65090_INT_STS,
	148	.mask_base = TPS65090_INT_MSK,
	149	.mask_invert = true,
	150	};
3c33be06 VB	151
	152	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	153	{
759f2598	154	if ((reg == TPS65090_INT_STS) \|\| (reg == TPS65090_INT_STS2))
3c33be06 VB	155	return true;
	156	else
	157	return false;
	158	}
	159
	160	static const struct regmap_config tps65090_regmap_config = {
	161	.reg_bits = 8,
	162	.val_bits = 8,
	163	.max_register = TOTAL_NUM_REG,
	164	.num_reg_defaults_raw = TOTAL_NUM_REG,
	165	.cache_type = REGCACHE_RBTREE,
	166	.volatile_reg = is_volatile_reg,
	167	};
	168
40719314 LD	169	#ifdef CONFIG_OF
	170	static const struct of_device_id tps65090_of_match[] = {
	171	{ .compatible = "ti,tps65090",},
	172	{},
	173	};
	174	MODULE_DEVICE_TABLE(of, tps65090_of_match);
	175	#endif
	176
f791be49	177	static int tps65090_i2c_probe(struct i2c_client *client,
3c33be06 VB	178	const struct i2c_device_id *id)
3c33be06 VB	179	{
334a41ce	180	struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
40719314	181	int irq_base = 0;
3c33be06 VB	182	struct tps65090 *tps65090;
	183	int ret;
	184
40719314 LD	185	if (!pdata && !client->dev.of_node) {
	186	dev_err(&client->dev,
	187	"tps65090 requires platform data or of_node\n");
3c33be06 VB	188	return -EINVAL;
	189	}
	190
40719314 LD	191	if (pdata)
	192	irq_base = pdata->irq_base;
	193
e8e6f047 LD	194	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
	195	if (!tps65090) {
	196	dev_err(&client->dev, "mem alloc for tps65090 failed\n");
3c33be06	197	return -ENOMEM;
e8e6f047	198	}
3c33be06	199
3c33be06 VB	200	tps65090->dev = &client->dev;
	201	i2c_set_clientdata(client, tps65090);
	202
3863db3e	203	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
3c33be06	204	if (IS_ERR(tps65090->rmap)) {
b683a0a6 AL	205	ret = PTR_ERR(tps65090->rmap);
b683a0a6 AL	206	dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
759f2598 LD	207	return ret;
	208	}
	209
	210	if (client->irq) {
	211	ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
40719314	212	IRQF_ONESHOT \| IRQF_TRIGGER_LOW, irq_base,
759f2598 LD	213	&tps65090_irq_chip, &tps65090->irq_data);
	214	if (ret) {
	215	dev_err(&client->dev,
	216	"IRQ init failed with err: %d\n", ret);
	217	return ret;
	218	}
7d811771 DA	219	} else {
	220	/* Don't tell children they have an IRQ that'll never fire */
	221	tps65090s[CHARGER].num_resources = 0;
b683a0a6	222	}
3c33be06 VB	223
3c33be06 VB	224	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
759f2598	225	ARRAY_SIZE(tps65090s), NULL,
4f979ed5	226	0, regmap_irq_get_domain(tps65090->irq_data));
3c33be06 VB	227	if (ret) {
	228	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	229	ret);
1d88f7a0	230	goto err_irq_exit;
3c33be06 VB	231	}
	232
	233	return 0;
	234
3c33be06 VB	235	err_irq_exit:
3c33be06 VB	236	if (client->irq)
759f2598	237	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	238	return ret;
	239	}
	240
4740f73f	241	static int tps65090_i2c_remove(struct i2c_client *client)
3c33be06 VB	242	{
	243	struct tps65090 *tps65090 = i2c_get_clientdata(client);
	244
	245	mfd_remove_devices(tps65090->dev);
3c33be06	246	if (client->irq)
759f2598	247	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	248
	249	return 0;
	250	}
	251
3c33be06 VB	252	static const struct i2c_device_id tps65090_id_table[] = {
	253	{ "tps65090", 0 },
	254	{ },
	255	};
	256	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
	257
	258	static struct i2c_driver tps65090_driver = {
	259	.driver = {
	260	.name = "tps65090",
	261	.owner = THIS_MODULE,
40719314	262	.of_match_table = of_match_ptr(tps65090_of_match),
3c33be06 VB	263	},
3c33be06 VB	264	.probe = tps65090_i2c_probe,
84449216	265	.remove = tps65090_i2c_remove,
3c33be06 VB	266	.id_table = tps65090_id_table,
	267	};
	268
	269	static int __init tps65090_init(void)
	270	{
	271	return i2c_add_driver(&tps65090_driver);
	272	}
	273	subsys_initcall(tps65090_init);
	274
	275	static void __exit tps65090_exit(void)
	276	{
	277	i2c_del_driver(&tps65090_driver);
	278	}
	279	module_exit(tps65090_exit);
	280
	281	MODULE_DESCRIPTION("TPS65090 core driver");
	282	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	283	MODULE_LICENSE("GPL v2");