[linux-2.6-block.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 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_REG_INTR_STS,
	.mask_base = TPS65090_REG_INTR_MASK,
	.mask_invert = true,
};

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	/* Nearly all registers have status bits mixed in, except a few */
	switch (reg) {
	case TPS65090_REG_INTR_MASK:
	case TPS65090_REG_INTR_MASK2:
	case TPS65090_REG_CG_CTRL0:
	case TPS65090_REG_CG_CTRL1:
	case TPS65090_REG_CG_CTRL2:
	case TPS65090_REG_CG_CTRL3:
	case TPS65090_REG_CG_CTRL4:
	case TPS65090_REG_CG_CTRL5:
		return false;
	}
	return true;
}

static const struct regmap_config tps65090_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TPS65090_MAX_REG,
	.num_reg_defaults_raw = TPS65090_NUM_REGS,
	.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)
		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",
		.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
3c33be06	33
759f2598 LD	34	#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
	35	#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
	36	#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
	37	#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
	38	#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
	39	#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
	40	#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
	41	#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
	42	#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
	43	#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
	44	#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
	45	#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
	46	#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
	47	#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
	48	#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
3c33be06	49
36c772e3 RK	50	static struct resource charger_resources[] = {
	51	{
	52	.start = TPS65090_IRQ_VAC_STATUS_CHANGE,
	53	.end = TPS65090_IRQ_VAC_STATUS_CHANGE,
	54	.flags = IORESOURCE_IRQ,
	55	}
	56	};
	57
7d811771 DA	58	enum tps65090_cells {
	59	PMIC = 0,
	60	CHARGER = 1,
	61	};
	62
	63	static struct mfd_cell tps65090s[] = {
	64	[PMIC] = {
b7e53786	65	.name = "tps65090-pmic",
3c33be06	66	},
7d811771	67	[CHARGER] = {
e2e8ffc9	68	.name = "tps65090-charger",
36c772e3 RK	69	.num_resources = ARRAY_SIZE(charger_resources),
36c772e3 RK	70	.resources = &charger_resources[0],
b50cf35b	71	.of_compatible = "ti,tps65090-charger",
3c33be06 VB	72	},
	73	};
	74
759f2598 LD	75	static const struct regmap_irq tps65090_irqs[] = {
	76	/* INT1 IRQs*/
	77	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
12849b63	78	.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
759f2598 LD	79	},
759f2598 LD	80	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
12849b63	81	.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
759f2598 LD	82	},
759f2598 LD	83	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
12849b63	84	.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
759f2598 LD	85	},
759f2598 LD	86	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
12849b63	87	.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
759f2598 LD	88	},
759f2598 LD	89	[TPS65090_IRQ_CHARGING_COMPLETE] = {
12849b63	90	.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
759f2598 LD	91	},
759f2598 LD	92	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
12849b63	93	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
759f2598 LD	94	},
759f2598 LD	95	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
12849b63	96	.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
759f2598 LD	97	},
	98	/* INT2 IRQs*/
	99	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
12849b63 LJ	100	.reg_offset = 1,
12849b63 LJ	101	.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
759f2598 LD	102	},
759f2598 LD	103	[TPS65090_IRQ_OVERLOAD_FET1] = {
12849b63 LJ	104	.reg_offset = 1,
12849b63 LJ	105	.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
759f2598 LD	106	},
759f2598 LD	107	[TPS65090_IRQ_OVERLOAD_FET2] = {
12849b63 LJ	108	.reg_offset = 1,
12849b63 LJ	109	.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
759f2598 LD	110	},
759f2598 LD	111	[TPS65090_IRQ_OVERLOAD_FET3] = {
12849b63 LJ	112	.reg_offset = 1,
12849b63 LJ	113	.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
759f2598 LD	114	},
759f2598 LD	115	[TPS65090_IRQ_OVERLOAD_FET4] = {
12849b63 LJ	116	.reg_offset = 1,
12849b63 LJ	117	.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
759f2598 LD	118	},
759f2598 LD	119	[TPS65090_IRQ_OVERLOAD_FET5] = {
12849b63 LJ	120	.reg_offset = 1,
12849b63 LJ	121	.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
759f2598 LD	122	},
759f2598 LD	123	[TPS65090_IRQ_OVERLOAD_FET6] = {
12849b63 LJ	124	.reg_offset = 1,
12849b63 LJ	125	.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
759f2598 LD	126	},
759f2598 LD	127	[TPS65090_IRQ_OVERLOAD_FET7] = {
12849b63 LJ	128	.reg_offset = 1,
12849b63 LJ	129	.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
759f2598 LD	130	},
759f2598 LD	131	};
3c33be06	132
759f2598 LD	133	static struct regmap_irq_chip tps65090_irq_chip = {
	134	.name = "tps65090",
	135	.irqs = tps65090_irqs,
	136	.num_irqs = ARRAY_SIZE(tps65090_irqs),
	137	.num_regs = NUM_INT_REG,
c42ba72e DA	138	.status_base = TPS65090_REG_INTR_STS,
c42ba72e DA	139	.mask_base = TPS65090_REG_INTR_MASK,
759f2598 LD	140	.mask_invert = true,
759f2598 LD	141	};
3c33be06 VB	142
	143	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	144	{
c42ba72e DA	145	/* Nearly all registers have status bits mixed in, except a few */
	146	switch (reg) {
	147	case TPS65090_REG_INTR_MASK:
	148	case TPS65090_REG_INTR_MASK2:
	149	case TPS65090_REG_CG_CTRL0:
	150	case TPS65090_REG_CG_CTRL1:
	151	case TPS65090_REG_CG_CTRL2:
	152	case TPS65090_REG_CG_CTRL3:
	153	case TPS65090_REG_CG_CTRL4:
	154	case TPS65090_REG_CG_CTRL5:
3c33be06	155	return false;
c42ba72e DA	156	}
c42ba72e DA	157	return true;
3c33be06 VB	158	}
	159
	160	static const struct regmap_config tps65090_regmap_config = {
	161	.reg_bits = 8,
	162	.val_bits = 8,
5c148890 MS	163	.max_register = TPS65090_MAX_REG,
5c148890 MS	164	.num_reg_defaults_raw = TPS65090_NUM_REGS,
3c33be06 VB	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,
12849b63	178	const struct i2c_device_id *id)
3c33be06	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	194	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
8a232f0b	195	if (!tps65090)
3c33be06 VB	196	return -ENOMEM;
3c33be06 VB	197
3c33be06 VB	198	tps65090->dev = &client->dev;
	199	i2c_set_clientdata(client, tps65090);
	200
3863db3e	201	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
3c33be06	202	if (IS_ERR(tps65090->rmap)) {
b683a0a6 AL	203	ret = PTR_ERR(tps65090->rmap);
b683a0a6 AL	204	dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
759f2598 LD	205	return ret;
	206	}
	207
	208	if (client->irq) {
	209	ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
12849b63 LJ	210	IRQF_ONESHOT \| IRQF_TRIGGER_LOW, irq_base,
	211	&tps65090_irq_chip, &tps65090->irq_data);
	212	if (ret) {
	213	dev_err(&client->dev,
	214	"IRQ init failed with err: %d\n", ret);
759f2598 LD	215	return ret;
759f2598 LD	216	}
7d811771 DA	217	} else {
	218	/* Don't tell children they have an IRQ that'll never fire */
	219	tps65090s[CHARGER].num_resources = 0;
b683a0a6	220	}
3c33be06 VB	221
3c33be06 VB	222	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
12849b63 LJ	223	ARRAY_SIZE(tps65090s), NULL,
12849b63 LJ	224	0, regmap_irq_get_domain(tps65090->irq_data));
3c33be06 VB	225	if (ret) {
	226	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	227	ret);
1d88f7a0	228	goto err_irq_exit;
3c33be06 VB	229	}
	230
	231	return 0;
	232
3c33be06 VB	233	err_irq_exit:
3c33be06 VB	234	if (client->irq)
759f2598	235	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	236	return ret;
	237	}
	238
4740f73f	239	static int tps65090_i2c_remove(struct i2c_client *client)
3c33be06 VB	240	{
	241	struct tps65090 *tps65090 = i2c_get_clientdata(client);
	242
	243	mfd_remove_devices(tps65090->dev);
3c33be06	244	if (client->irq)
759f2598	245	regmap_del_irq_chip(client->irq, tps65090->irq_data);
3c33be06 VB	246
	247	return 0;
	248	}
	249
3c33be06 VB	250	static const struct i2c_device_id tps65090_id_table[] = {
	251	{ "tps65090", 0 },
	252	{ },
	253	};
	254	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
	255
	256	static struct i2c_driver tps65090_driver = {
	257	.driver = {
	258	.name = "tps65090",
40719314	259	.of_match_table = of_match_ptr(tps65090_of_match),
3c33be06 VB	260	},
3c33be06 VB	261	.probe = tps65090_i2c_probe,
84449216	262	.remove = tps65090_i2c_remove,
3c33be06 VB	263	.id_table = tps65090_id_table,
	264	};
	265
	266	static int __init tps65090_init(void)
	267	{
	268	return i2c_add_driver(&tps65090_driver);
	269	}
	270	subsys_initcall(tps65090_init);
	271
	272	static void __exit tps65090_exit(void)
	273	{
	274	i2c_del_driver(&tps65090_driver);
	275	}
	276	module_exit(tps65090_exit);
	277
	278	MODULE_DESCRIPTION("TPS65090 core driver");
	279	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	280	MODULE_LICENSE("GPL v2");