[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,
	}
};

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

	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
3c33be06 VB	67	static struct mfd_cell tps65090s[] = {
3c33be06 VB	68	{
b7e53786	69	.name = "tps65090-pmic",
3c33be06 VB	70	},
3c33be06 VB	71	{
e2e8ffc9	72	.name = "tps65090-charger",
36c772e3 RK	73	.num_resources = ARRAY_SIZE(charger_resources),
36c772e3 RK	74	.resources = &charger_resources[0],
b50cf35b	75	.of_compatible = "ti,tps65090-charger",
3c33be06 VB	76	},
	77	};
	78
759f2598 LD	79	static const struct regmap_irq tps65090_irqs[] = {
	80	/* INT1 IRQs*/
	81	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
	82	.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
	83	},
	84	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
	85	.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
	86	},
	87	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
	88	.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
	89	},
	90	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
	91	.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
	92	},
	93	[TPS65090_IRQ_CHARGING_COMPLETE] = {
	94	.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
	95	},
	96	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
	97	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
	98	},
	99	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
	100	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
	101	},
	102	/* INT2 IRQs*/
	103	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
	104	.reg_offset = 1,
	105	.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
	106	},
	107	[TPS65090_IRQ_OVERLOAD_FET1] = {
	108	.reg_offset = 1,
	109	.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
	110	},
	111	[TPS65090_IRQ_OVERLOAD_FET2] = {
	112	.reg_offset = 1,
	113	.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
	114	},
	115	[TPS65090_IRQ_OVERLOAD_FET3] = {
	116	.reg_offset = 1,
	117	.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
	118	},
	119	[TPS65090_IRQ_OVERLOAD_FET4] = {
	120	.reg_offset = 1,
	121	.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
	122	},
	123	[TPS65090_IRQ_OVERLOAD_FET5] = {
	124	.reg_offset = 1,
	125	.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
	126	},
	127	[TPS65090_IRQ_OVERLOAD_FET6] = {
	128	.reg_offset = 1,
	129	.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
	130	},
	131	[TPS65090_IRQ_OVERLOAD_FET7] = {
	132	.reg_offset = 1,
	133	.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
	134	},
	135	};
3c33be06	136
759f2598 LD	137	static struct regmap_irq_chip tps65090_irq_chip = {
	138	.name = "tps65090",
	139	.irqs = tps65090_irqs,
	140	.num_irqs = ARRAY_SIZE(tps65090_irqs),
	141	.num_regs = NUM_INT_REG,
	142	.status_base = TPS65090_INT_STS,
	143	.mask_base = TPS65090_INT_MSK,
	144	.mask_invert = true,
	145	};
3c33be06 VB	146
	147	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	148	{
759f2598	149	if ((reg == TPS65090_INT_STS) \|\| (reg == TPS65090_INT_STS2))
3c33be06 VB	150	return true;
	151	else
	152	return false;
	153	}
	154
	155	static const struct regmap_config tps65090_regmap_config = {
	156	.reg_bits = 8,
	157	.val_bits = 8,
	158	.max_register = TOTAL_NUM_REG,
	159	.num_reg_defaults_raw = TOTAL_NUM_REG,
	160	.cache_type = REGCACHE_RBTREE,
	161	.volatile_reg = is_volatile_reg,
	162	};
	163
40719314 LD	164	#ifdef CONFIG_OF
	165	static const struct of_device_id tps65090_of_match[] = {
	166	{ .compatible = "ti,tps65090",},
	167	{},
	168	};
	169	MODULE_DEVICE_TABLE(of, tps65090_of_match);
	170	#endif
	171
f791be49	172	static int tps65090_i2c_probe(struct i2c_client *client,
3c33be06 VB	173	const struct i2c_device_id *id)
3c33be06 VB	174	{
334a41ce	175	struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
40719314	176	int irq_base = 0;
3c33be06 VB	177	struct tps65090 *tps65090;
	178	int ret;
	179
40719314 LD	180	if (!pdata && !client->dev.of_node) {
	181	dev_err(&client->dev,
	182	"tps65090 requires platform data or of_node\n");
3c33be06 VB	183	return -EINVAL;
	184	}
	185
40719314 LD	186	if (pdata)
	187	irq_base = pdata->irq_base;
	188
e8e6f047 LD	189	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
	190	if (!tps65090) {
	191	dev_err(&client->dev, "mem alloc for tps65090 failed\n");
3c33be06	192	return -ENOMEM;
e8e6f047	193	}
3c33be06	194
3c33be06 VB	195	tps65090->dev = &client->dev;
	196	i2c_set_clientdata(client, tps65090);
	197
3863db3e	198	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
3c33be06	199	if (IS_ERR(tps65090->rmap)) {
b683a0a6 AL	200	ret = PTR_ERR(tps65090->rmap);
b683a0a6 AL	201	dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
759f2598 LD	202	return ret;
	203	}
	204
	205	if (client->irq) {
	206	ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
40719314	207	IRQF_ONESHOT \| IRQF_TRIGGER_LOW, irq_base,
759f2598 LD	208	&tps65090_irq_chip, &tps65090->irq_data);
	209	if (ret) {
	210	dev_err(&client->dev,
	211	"IRQ init failed with err: %d\n", ret);
	212	return ret;
	213	}
b683a0a6	214	}
3c33be06 VB	215
3c33be06 VB	216	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
759f2598	217	ARRAY_SIZE(tps65090s), NULL,
4f979ed5	218	0, regmap_irq_get_domain(tps65090->irq_data));
3c33be06 VB	219	if (ret) {
	220	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	221	ret);
1d88f7a0	222	goto err_irq_exit;
3c33be06 VB	223	}
	224
	225	return 0;
	226
3c33be06 VB	227	err_irq_exit:
3c33be06 VB	228	if (client->irq)
759f2598	229	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	230	return ret;
	231	}
	232
4740f73f	233	static int tps65090_i2c_remove(struct i2c_client *client)
3c33be06 VB	234	{
	235	struct tps65090 *tps65090 = i2c_get_clientdata(client);
	236
	237	mfd_remove_devices(tps65090->dev);
3c33be06	238	if (client->irq)
759f2598	239	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	240
	241	return 0;
	242	}
	243
3c33be06 VB	244	static const struct i2c_device_id tps65090_id_table[] = {
	245	{ "tps65090", 0 },
	246	{ },
	247	};
	248	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
	249
	250	static struct i2c_driver tps65090_driver = {
	251	.driver = {
	252	.name = "tps65090",
	253	.owner = THIS_MODULE,
40719314	254	.of_match_table = of_match_ptr(tps65090_of_match),
3c33be06 VB	255	},
3c33be06 VB	256	.probe = tps65090_i2c_probe,
84449216	257	.remove = tps65090_i2c_remove,
3c33be06 VB	258	.id_table = tps65090_id_table,
	259	};
	260
	261	static int __init tps65090_init(void)
	262	{
	263	return i2c_add_driver(&tps65090_driver);
	264	}
	265	subsys_initcall(tps65090_init);
	266
	267	static void __exit tps65090_exit(void)
	268	{
	269	i2c_del_driver(&tps65090_driver);
	270	}
	271	module_exit(tps65090_exit);
	272
	273	MODULE_DESCRIPTION("TPS65090 core driver");
	274	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	275	MODULE_LICENSE("GPL v2");