[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / tps65218.c

/*
 * Driver for TPS65218 Integrated power management chipsets
 *
 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether expressed or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License version 2 for more details.
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>

#include <linux/mfd/core.h>
#include <linux/mfd/tps65218.h>

#define TPS65218_PASSWORD_REGS_UNLOCK   0x7D

static const struct mfd_cell tps65218_cells[] = {
	{
		.name = "tps65218-pwrbutton",
		.of_compatible = "ti,tps65218-pwrbutton",
	},
	{
		.name = "tps65218-gpio",
		.of_compatible = "ti,tps65218-gpio",
	},
	{ .name = "tps65218-regulator", },
};

/**
 * tps65218_reg_write: Write a single tps65218 register.
 *
 * @tps65218: Device to write to.
 * @reg: Register to write to.
 * @val: Value to write.
 * @level: Password protected level
 */
int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
			unsigned int val, unsigned int level)
{
	int ret;
	unsigned int xor_reg_val;

	switch (level) {
	case TPS65218_PROTECT_NONE:
		return regmap_write(tps->regmap, reg, val);
	case TPS65218_PROTECT_L1:
		xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
		ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
							xor_reg_val);
		if (ret < 0)
			return ret;

		return regmap_write(tps->regmap, reg, val);
	default:
		return -EINVAL;
	}
}
EXPORT_SYMBOL_GPL(tps65218_reg_write);

/**
 * tps65218_update_bits: Modify bits w.r.t mask, val and level.
 *
 * @tps65218: Device to write to.
 * @reg: Register to read-write to.
 * @mask: Mask.
 * @val: Value to write.
 * @level: Password protected level
 */
static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
		unsigned int mask, unsigned int val, unsigned int level)
{
	int ret;
	unsigned int data;

	ret = regmap_read(tps->regmap, reg, &data);
	if (ret) {
		dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
		return ret;
	}

	data &= ~mask;
	data |= val & mask;

	mutex_lock(&tps->tps_lock);
	ret = tps65218_reg_write(tps, reg, data, level);
	if (ret)
		dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
	mutex_unlock(&tps->tps_lock);

	return ret;
}

int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
		unsigned int mask, unsigned int val, unsigned int level)
{
	return tps65218_update_bits(tps, reg, mask, val, level);
}
EXPORT_SYMBOL_GPL(tps65218_set_bits);

int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
		unsigned int mask, unsigned int level)
{
	return tps65218_update_bits(tps, reg, mask, 0, level);
}
EXPORT_SYMBOL_GPL(tps65218_clear_bits);

static const struct regmap_range tps65218_yes_ranges[] = {
	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
};

static const struct regmap_access_table tps65218_volatile_table = {
	.yes_ranges = tps65218_yes_ranges,
	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
};

static const struct regmap_config tps65218_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.cache_type = REGCACHE_RBTREE,
	.volatile_table = &tps65218_volatile_table,
};

static const struct regmap_irq tps65218_irqs[] = {
	/* INT1 IRQs */
	[TPS65218_PRGC_IRQ] = {
		.mask = TPS65218_INT1_PRGC,
	},
	[TPS65218_CC_AQC_IRQ] = {
		.mask = TPS65218_INT1_CC_AQC,
	},
	[TPS65218_HOT_IRQ] = {
		.mask = TPS65218_INT1_HOT,
	},
	[TPS65218_PB_IRQ] = {
		.mask = TPS65218_INT1_PB,
	},
	[TPS65218_AC_IRQ] = {
		.mask = TPS65218_INT1_AC,
	},
	[TPS65218_VPRG_IRQ] = {
		.mask = TPS65218_INT1_VPRG,
	},
	[TPS65218_INVALID1_IRQ] = {
	},
	[TPS65218_INVALID2_IRQ] = {
	},
	/* INT2 IRQs*/
	[TPS65218_LS1_I_IRQ] = {
		.mask = TPS65218_INT2_LS1_I,
		.reg_offset = 1,
	},
	[TPS65218_LS2_I_IRQ] = {
		.mask = TPS65218_INT2_LS2_I,
		.reg_offset = 1,
	},
	[TPS65218_LS3_I_IRQ] = {
		.mask = TPS65218_INT2_LS3_I,
		.reg_offset = 1,
	},
	[TPS65218_LS1_F_IRQ] = {
		.mask = TPS65218_INT2_LS1_F,
		.reg_offset = 1,
	},
	[TPS65218_LS2_F_IRQ] = {
		.mask = TPS65218_INT2_LS2_F,
		.reg_offset = 1,
	},
	[TPS65218_LS3_F_IRQ] = {
		.mask = TPS65218_INT2_LS3_F,
		.reg_offset = 1,
	},
	[TPS65218_INVALID3_IRQ] = {
	},
	[TPS65218_INVALID4_IRQ] = {
	},
};

static struct regmap_irq_chip tps65218_irq_chip = {
	.name = "tps65218",
	.irqs = tps65218_irqs,
	.num_irqs = ARRAY_SIZE(tps65218_irqs),

	.num_regs = 2,
	.mask_base = TPS65218_REG_INT_MASK1,
	.status_base = TPS65218_REG_INT1,
};

static const struct of_device_id of_tps65218_match_table[] = {
	{ .compatible = "ti,tps65218", },
	{}
};
MODULE_DEVICE_TABLE(of, of_tps65218_match_table);

static int tps65218_probe(struct i2c_client *client,
				const struct i2c_device_id *ids)
{
	struct tps65218 *tps;
	const struct of_device_id *match;
	int ret;
	unsigned int chipid;

	match = of_match_device(of_tps65218_match_table, &client->dev);
	if (!match) {
		dev_err(&client->dev,
			"Failed to find matching dt id\n");
		return -EINVAL;
	}

	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
	if (!tps)
		return -ENOMEM;

	i2c_set_clientdata(client, tps);
	tps->dev = &client->dev;
	tps->irq = client->irq;
	tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
	if (IS_ERR(tps->regmap)) {
		ret = PTR_ERR(tps->regmap);
		dev_err(tps->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	mutex_init(&tps->tps_lock);

	ret = regmap_add_irq_chip(tps->regmap, tps->irq,
			IRQF_ONESHOT, 0, &tps65218_irq_chip,
			&tps->irq_data);
	if (ret < 0)
		return ret;

	ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
	if (ret) {
		dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
		return ret;
	}

	tps->rev = chipid & TPS65218_CHIPID_REV_MASK;

	ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
			      ARRAY_SIZE(tps65218_cells), NULL, 0,
			      regmap_irq_get_domain(tps->irq_data));

	if (ret < 0)
		goto err_irq;

	return 0;

err_irq:
	regmap_del_irq_chip(tps->irq, tps->irq_data);

	return ret;
}

static int tps65218_remove(struct i2c_client *client)
{
	struct tps65218 *tps = i2c_get_clientdata(client);

	regmap_del_irq_chip(tps->irq, tps->irq_data);

	return 0;
}

static const struct i2c_device_id tps65218_id_table[] = {
	{ "tps65218", TPS65218 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, tps65218_id_table);

static struct i2c_driver tps65218_driver = {
	.driver		= {
		.name	= "tps65218",
		.of_match_table = of_tps65218_match_table,
	},
	.probe		= tps65218_probe,
	.remove		= tps65218_remove,
	.id_table       = tps65218_id_table,
};

module_i2c_driver(tps65218_driver);

MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
44b4dc61 K	1	/*
	2	* Driver for TPS65218 Integrated power management chipsets
	3	*
	4	* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	11	* kind, whether expressed or implied; without even the implied warranty
	12	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License version 2 for more details.
	14	*/
	15
	16	#include <linux/kernel.h>
	17	#include <linux/device.h>
	18	#include <linux/module.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/init.h>
	21	#include <linux/i2c.h>
	22	#include <linux/slab.h>
	23	#include <linux/regmap.h>
	24	#include <linux/err.h>
	25	#include <linux/of.h>
	26	#include <linux/of_device.h>
	27	#include <linux/irq.h>
	28	#include <linux/interrupt.h>
	29	#include <linux/mutex.h>
	30
	31	#include <linux/mfd/core.h>
	32	#include <linux/mfd/tps65218.h>
	33
	34	#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
	35
4531156d K	36	static const struct mfd_cell tps65218_cells[] = {
	37	{
	38	.name = "tps65218-pwrbutton",
	39	.of_compatible = "ti,tps65218-pwrbutton",
	40	},
	41	{
	42	.name = "tps65218-gpio",
	43	.of_compatible = "ti,tps65218-gpio",
	44	},
	45	{ .name = "tps65218-regulator", },
	46	};
	47
44b4dc61 K	48	/**
	49	* tps65218_reg_write: Write a single tps65218 register.
	50	*
	51	* @tps65218: Device to write to.
	52	* @reg: Register to write to.
	53	* @val: Value to write.
	54	* @level: Password protected level
	55	*/
	56	int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
	57	unsigned int val, unsigned int level)
	58	{
	59	int ret;
	60	unsigned int xor_reg_val;
	61
	62	switch (level) {
	63	case TPS65218_PROTECT_NONE:
	64	return regmap_write(tps->regmap, reg, val);
	65	case TPS65218_PROTECT_L1:
	66	xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
	67	ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
	68	xor_reg_val);
	69	if (ret < 0)
	70	return ret;
	71
	72	return regmap_write(tps->regmap, reg, val);
	73	default:
	74	return -EINVAL;
	75	}
	76	}
	77	EXPORT_SYMBOL_GPL(tps65218_reg_write);
	78
	79	/**
	80	* tps65218_update_bits: Modify bits w.r.t mask, val and level.
	81	*
	82	* @tps65218: Device to write to.
	83	* @reg: Register to read-write to.
	84	* @mask: Mask.
	85	* @val: Value to write.
	86	* @level: Password protected level
	87	*/
	88	static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
	89	unsigned int mask, unsigned int val, unsigned int level)
	90	{
	91	int ret;
	92	unsigned int data;
	93
0aced355	94	ret = regmap_read(tps->regmap, reg, &data);
44b4dc61 K	95	if (ret) {
	96	dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
	97	return ret;
	98	}
	99
	100	data &= ~mask;
	101	data \|= val & mask;
	102
	103	mutex_lock(&tps->tps_lock);
	104	ret = tps65218_reg_write(tps, reg, data, level);
	105	if (ret)
	106	dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
	107	mutex_unlock(&tps->tps_lock);
	108
	109	return ret;
	110	}
	111
	112	int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
	113	unsigned int mask, unsigned int val, unsigned int level)
	114	{
	115	return tps65218_update_bits(tps, reg, mask, val, level);
	116	}
	117	EXPORT_SYMBOL_GPL(tps65218_set_bits);
	118
	119	int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
	120	unsigned int mask, unsigned int level)
	121	{
	122	return tps65218_update_bits(tps, reg, mask, 0, level);
	123	}
	124	EXPORT_SYMBOL_GPL(tps65218_clear_bits);
	125
773328da FB	126	static const struct regmap_range tps65218_yes_ranges[] = {
	127	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
	128	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
	129	};
	130
	131	static const struct regmap_access_table tps65218_volatile_table = {
	132	.yes_ranges = tps65218_yes_ranges,
	133	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
	134	};
	135
18bb399f	136	static const struct regmap_config tps65218_regmap_config = {
44b4dc61 K	137	.reg_bits = 8,
	138	.val_bits = 8,
	139	.cache_type = REGCACHE_RBTREE,
773328da	140	.volatile_table = &tps65218_volatile_table,
44b4dc61 K	141	};
	142
	143	static const struct regmap_irq tps65218_irqs[] = {
	144	/* INT1 IRQs */
	145	[TPS65218_PRGC_IRQ] = {
	146	.mask = TPS65218_INT1_PRGC,
	147	},
	148	[TPS65218_CC_AQC_IRQ] = {
	149	.mask = TPS65218_INT1_CC_AQC,
	150	},
	151	[TPS65218_HOT_IRQ] = {
	152	.mask = TPS65218_INT1_HOT,
	153	},
	154	[TPS65218_PB_IRQ] = {
	155	.mask = TPS65218_INT1_PB,
	156	},
	157	[TPS65218_AC_IRQ] = {
	158	.mask = TPS65218_INT1_AC,
	159	},
	160	[TPS65218_VPRG_IRQ] = {
	161	.mask = TPS65218_INT1_VPRG,
	162	},
	163	[TPS65218_INVALID1_IRQ] = {
	164	},
	165	[TPS65218_INVALID2_IRQ] = {
	166	},
	167	/* INT2 IRQs*/
	168	[TPS65218_LS1_I_IRQ] = {
	169	.mask = TPS65218_INT2_LS1_I,
	170	.reg_offset = 1,
	171	},
	172	[TPS65218_LS2_I_IRQ] = {
	173	.mask = TPS65218_INT2_LS2_I,
	174	.reg_offset = 1,
	175	},
	176	[TPS65218_LS3_I_IRQ] = {
	177	.mask = TPS65218_INT2_LS3_I,
	178	.reg_offset = 1,
	179	},
	180	[TPS65218_LS1_F_IRQ] = {
	181	.mask = TPS65218_INT2_LS1_F,
	182	.reg_offset = 1,
	183	},
	184	[TPS65218_LS2_F_IRQ] = {
	185	.mask = TPS65218_INT2_LS2_F,
	186	.reg_offset = 1,
	187	},
	188	[TPS65218_LS3_F_IRQ] = {
	189	.mask = TPS65218_INT2_LS3_F,
	190	.reg_offset = 1,
	191	},
	192	[TPS65218_INVALID3_IRQ] = {
	193	},
	194	[TPS65218_INVALID4_IRQ] = {
	195	},
	196	};
	197
	198	static struct regmap_irq_chip tps65218_irq_chip = {
	199	.name = "tps65218",
	200	.irqs = tps65218_irqs,
	201	.num_irqs = ARRAY_SIZE(tps65218_irqs),
	202
	203	.num_regs = 2,
	204	.mask_base = TPS65218_REG_INT_MASK1,
f29ae369	205	.status_base = TPS65218_REG_INT1,
44b4dc61 K	206	};
	207
	208	static const struct of_device_id of_tps65218_match_table[] = {
	209	{ .compatible = "ti,tps65218", },
8320513e	210	{}
44b4dc61	211	};
4895e493	212	MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
44b4dc61 K	213
	214	static int tps65218_probe(struct i2c_client *client,
	215	const struct i2c_device_id *ids)
	216	{
	217	struct tps65218 *tps;
	218	const struct of_device_id *match;
	219	int ret;
f11fa179	220	unsigned int chipid;
44b4dc61 K	221
	222	match = of_match_device(of_tps65218_match_table, &client->dev);
	223	if (!match) {
	224	dev_err(&client->dev,
	225	"Failed to find matching dt id\n");
	226	return -EINVAL;
	227	}
	228
	229	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
	230	if (!tps)
	231	return -ENOMEM;
	232
	233	i2c_set_clientdata(client, tps);
	234	tps->dev = &client->dev;
	235	tps->irq = client->irq;
	236	tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
	237	if (IS_ERR(tps->regmap)) {
	238	ret = PTR_ERR(tps->regmap);
	239	dev_err(tps->dev, "Failed to allocate register map: %d\n",
	240	ret);
	241	return ret;
	242	}
	243
	244	mutex_init(&tps->tps_lock);
	245
	246	ret = regmap_add_irq_chip(tps->regmap, tps->irq,
	247	IRQF_ONESHOT, 0, &tps65218_irq_chip,
	248	&tps->irq_data);
	249	if (ret < 0)
	250	return ret;
	251
0aced355	252	ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
f11fa179 TK	253	if (ret) {
	254	dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
	255	return ret;
	256	}
	257
	258	tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
	259
4531156d K	260	ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
	261	ARRAY_SIZE(tps65218_cells), NULL, 0,
	262	regmap_irq_get_domain(tps->irq_data));
	263
44b4dc61 K	264	if (ret < 0)
	265	goto err_irq;
	266
	267	return 0;
	268
	269	err_irq:
	270	regmap_del_irq_chip(tps->irq, tps->irq_data);
	271
	272	return ret;
	273	}
	274
	275	static int tps65218_remove(struct i2c_client *client)
	276	{
	277	struct tps65218 *tps = i2c_get_clientdata(client);
	278
	279	regmap_del_irq_chip(tps->irq, tps->irq_data);
	280
	281	return 0;
	282	}
	283
	284	static const struct i2c_device_id tps65218_id_table[] = {
	285	{ "tps65218", TPS65218 },
	286	{ },
	287	};
	288	MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
	289
	290	static struct i2c_driver tps65218_driver = {
	291	.driver = {
	292	.name = "tps65218",
44b4dc61 K	293	.of_match_table = of_tps65218_match_table,
	294	},
	295	.probe = tps65218_probe,
	296	.remove = tps65218_remove,
	297	.id_table = tps65218_id_table,
	298	};
	299
	300	module_i2c_driver(tps65218_driver);
	301
	302	MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
	303	MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
	304	MODULE_LICENSE("GPL v2");