[mirror_ubuntu-artful-kernel.git] / drivers / mfd / tps65217.c

/*
 * tps65217.c
 *
 * TPS65217 chip family multi-function driver
 *
 * Copyright (C) 2011 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 as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

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

#include <linux/mfd/core.h>
#include <linux/mfd/tps65217.h>

static struct resource charger_resources[] = {
	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
};

static struct resource pb_resources[] = {
	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
};

struct tps65217_irq {
	int mask;
	int interrupt;
};

static const struct tps65217_irq tps65217_irqs[] = {
	[TPS65217_IRQ_PB] = {
		.mask = TPS65217_INT_PBM,
		.interrupt = TPS65217_INT_PBI,
	},
	[TPS65217_IRQ_AC] = {
		.mask = TPS65217_INT_ACM,
		.interrupt = TPS65217_INT_ACI,
	},
	[TPS65217_IRQ_USB] = {
		.mask = TPS65217_INT_USBM,
		.interrupt = TPS65217_INT_USBI,
	},
};

static void tps65217_irq_lock(struct irq_data *data)
{
	struct tps65217 *tps = irq_data_get_irq_chip_data(data);

	mutex_lock(&tps->irq_lock);
}

static void tps65217_irq_sync_unlock(struct irq_data *data)
{
	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	int ret;

	ret = tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask,
				TPS65217_PROTECT_NONE);
	if (ret != 0)
		dev_err(tps->dev, "Failed to sync IRQ masks\n");

	mutex_unlock(&tps->irq_lock);
}

static inline const struct tps65217_irq *
irq_to_tps65217_irq(struct tps65217 *tps, struct irq_data *data)
{
	return &tps65217_irqs[data->hwirq];
}

static void tps65217_irq_enable(struct irq_data *data)
{
	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data);

	tps->irq_mask &= ~irq_data->mask;
}

static void tps65217_irq_disable(struct irq_data *data)
{
	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data);

	tps->irq_mask |= irq_data->mask;
}

static struct irq_chip tps65217_irq_chip = {
	.irq_bus_lock		= tps65217_irq_lock,
	.irq_bus_sync_unlock	= tps65217_irq_sync_unlock,
	.irq_enable		= tps65217_irq_enable,
	.irq_disable		= tps65217_irq_disable,
};

static struct mfd_cell tps65217s[] = {
	{
		.name = "tps65217-pmic",
		.of_compatible = "ti,tps65217-pmic",
	},
	{
		.name = "tps65217-bl",
		.of_compatible = "ti,tps65217-bl",
	},
	{
		.name = "tps65217-charger",
		.num_resources = ARRAY_SIZE(charger_resources),
		.resources = charger_resources,
		.of_compatible = "ti,tps65217-charger",
	},
	{
		.name = "tps65217-pwrbutton",
		.num_resources = ARRAY_SIZE(pb_resources),
		.resources = pb_resources,
		.of_compatible = "ti,tps65217-pwrbutton",
	},
};

static irqreturn_t tps65217_irq_thread(int irq, void *data)
{
	struct tps65217 *tps = data;
	unsigned int status;
	bool handled = false;
	int i;
	int ret;

	ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
	if (ret < 0) {
		dev_err(tps->dev, "Failed to read IRQ status: %d\n",
			ret);
		return IRQ_NONE;
	}

	for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) {
		if (status & tps65217_irqs[i].interrupt) {
			handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
			handled = true;
		}
	}

	if (handled)
		return IRQ_HANDLED;

	return IRQ_NONE;
}

static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
			irq_hw_number_t hw)
{
	struct tps65217 *tps = h->host_data;

	irq_set_chip_data(virq, tps);
	irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
	irq_set_nested_thread(virq, 1);
	irq_set_parent(virq, tps->irq);
	irq_set_noprobe(virq);

	return 0;
}

static const struct irq_domain_ops tps65217_irq_domain_ops = {
	.map = tps65217_irq_map,
};

static int tps65217_irq_init(struct tps65217 *tps, int irq)
{
	int ret;

	mutex_init(&tps->irq_lock);
	tps->irq = irq;

	/* Mask all interrupt sources */
	tps->irq_mask = (TPS65217_INT_RESERVEDM | TPS65217_INT_PBM
			| TPS65217_INT_ACM | TPS65217_INT_USBM);
	tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask,
			TPS65217_PROTECT_NONE);

	tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
		TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
	if (!tps->irq_domain) {
		dev_err(tps->dev, "Could not create IRQ domain\n");
		return -ENOMEM;
	}

	ret = devm_request_threaded_irq(tps->dev, irq, NULL,
					tps65217_irq_thread, IRQF_ONESHOT,
					"tps65217-irq", tps);
	if (ret) {
		dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
			irq, ret);
		return ret;
	}

	return 0;
}

/**
 * tps65217_reg_read: Read a single tps65217 register.
 *
 * @tps: Device to read from.
 * @reg: Register to read.
 * @val: Contians the value
 */
int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
			unsigned int *val)
{
	return regmap_read(tps->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(tps65217_reg_read);

/**
 * tps65217_reg_write: Write a single tps65217 register.
 *
 * @tps65217: Device to write to.
 * @reg: Register to write to.
 * @val: Value to write.
 * @level: Password protected level
 */
int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
			unsigned int val, unsigned int level)
{
	int ret;
	unsigned int xor_reg_val;

	switch (level) {
	case TPS65217_PROTECT_NONE:
		return regmap_write(tps->regmap, reg, val);
	case TPS65217_PROTECT_L1:
		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
							xor_reg_val);
		if (ret < 0)
			return ret;

		return regmap_write(tps->regmap, reg, val);
	case TPS65217_PROTECT_L2:
		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
							xor_reg_val);
		if (ret < 0)
			return ret;
		ret = regmap_write(tps->regmap, reg, val);
		if (ret < 0)
			return ret;
		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
							xor_reg_val);
		if (ret < 0)
			return ret;
		return regmap_write(tps->regmap, reg, val);
	default:
		return -EINVAL;
	}
}
EXPORT_SYMBOL_GPL(tps65217_reg_write);

/**
 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
 *
 * @tps65217: Device to write to.
 * @reg: Register to read-write to.
 * @mask: Mask.
 * @val: Value to write.
 * @level: Password protected level
 */
static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
		unsigned int mask, unsigned int val, unsigned int level)
{
	int ret;
	unsigned int data;

	ret = tps65217_reg_read(tps, reg, &data);
	if (ret) {
		dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
		return ret;
	}

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

	ret = tps65217_reg_write(tps, reg, data, level);
	if (ret)
		dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);

	return ret;
}

int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
		unsigned int mask, unsigned int val, unsigned int level)
{
	return tps65217_update_bits(tps, reg, mask, val, level);
}
EXPORT_SYMBOL_GPL(tps65217_set_bits);

int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
		unsigned int mask, unsigned int level)
{
	return tps65217_update_bits(tps, reg, mask, 0, level);
}
EXPORT_SYMBOL_GPL(tps65217_clear_bits);

static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case TPS65217_REG_INT:
		return true;
	default:
		return false;
	}
}

static const struct regmap_config tps65217_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = TPS65217_REG_MAX,
	.volatile_reg = tps65217_volatile_reg,
};

static const struct of_device_id tps65217_of_match[] = {
	{ .compatible = "ti,tps65217", .data = (void *)TPS65217 },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, tps65217_of_match);

static int tps65217_probe(struct i2c_client *client,
				const struct i2c_device_id *ids)
{
	struct tps65217 *tps;
	unsigned int version;
	unsigned long chip_id = ids->driver_data;
	const struct of_device_id *match;
	bool status_off = false;
	int ret;

	if (client->dev.of_node) {
		match = of_match_device(tps65217_of_match, &client->dev);
		if (!match) {
			dev_err(&client->dev,
				"Failed to find matching dt id\n");
			return -EINVAL;
		}
		chip_id = (unsigned long)match->data;
		status_off = of_property_read_bool(client->dev.of_node,
					"ti,pmic-shutdown-controller");
	}

	if (!chip_id) {
		dev_err(&client->dev, "id is null.\n");
		return -ENODEV;
	}

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

	i2c_set_clientdata(client, tps);
	tps->dev = &client->dev;
	tps->id = chip_id;

	tps->regmap = devm_regmap_init_i2c(client, &tps65217_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;
	}

	if (client->irq) {
		tps65217_irq_init(tps, client->irq);
	} else {
		int i;

		/* Don't tell children about IRQ resources which won't fire */
		for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
			tps65217s[i].num_resources = 0;
	}

	ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
				   ARRAY_SIZE(tps65217s), NULL, 0,
				   tps->irq_domain);
	if (ret < 0) {
		dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
		return ret;
	}

	ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
	if (ret < 0) {
		dev_err(tps->dev, "Failed to read revision register: %d\n",
			ret);
		return ret;
	}

	/* Set the PMIC to shutdown on PWR_EN toggle */
	if (status_off) {
		ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
				TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
				TPS65217_PROTECT_NONE);
		if (ret)
			dev_warn(tps->dev, "unable to set the status OFF\n");
	}

	dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
			(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
			version & TPS65217_CHIPID_REV_MASK);

	return 0;
}

static const struct i2c_device_id tps65217_id_table[] = {
	{"tps65217", TPS65217},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, tps65217_id_table);

static struct i2c_driver tps65217_driver = {
	.driver		= {
		.name	= "tps65217",
		.of_match_table = tps65217_of_match,
	},
	.id_table	= tps65217_id_table,
	.probe		= tps65217_probe,
};

static int __init tps65217_init(void)
{
	return i2c_add_driver(&tps65217_driver);
}
subsys_initcall(tps65217_init);

static void __exit tps65217_exit(void)
{
	i2c_del_driver(&tps65217_driver);
}
module_exit(tps65217_exit);

MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d48f411c AC	1	/*
	2	* tps65217.c
	3	*
	4	* TPS65217 chip family multi-function driver
	5	*
	6	* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation version 2.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	13	* kind, whether express or implied; without even the implied warranty
	14	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
d48f411c	18	#include <linux/device.h>
6556bdac	19	#include <linux/err.h>
d48f411c	20	#include <linux/init.h>
6556bdac	21	#include <linux/interrupt.h>
d48f411c	22	#include <linux/i2c.h>
6556bdac MN	23	#include <linux/irq.h>
	24	#include <linux/irqdomain.h>
	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
817bb7fb AC	27	#include <linux/of.h>
817bb7fb AC	28	#include <linux/of_device.h>
6556bdac MN	29	#include <linux/platform_device.h>
	30	#include <linux/regmap.h>
	31	#include <linux/slab.h>
d48f411c AC	32
	33	#include <linux/mfd/core.h>
	34	#include <linux/mfd/tps65217.h>
	35
6556bdac MN	36	static struct resource charger_resources[] = {
	37	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
	38	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
	39	};
	40
dea9c730 MN	41	static struct resource pb_resources[] = {
	42	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
	43	};
	44
6556bdac MN	45	struct tps65217_irq {
	46	int mask;
	47	int interrupt;
	48	};
	49
	50	static const struct tps65217_irq tps65217_irqs[] = {
	51	[TPS65217_IRQ_PB] = {
	52	.mask = TPS65217_INT_PBM,
	53	.interrupt = TPS65217_INT_PBI,
	54	},
	55	[TPS65217_IRQ_AC] = {
	56	.mask = TPS65217_INT_ACM,
	57	.interrupt = TPS65217_INT_ACI,
	58	},
	59	[TPS65217_IRQ_USB] = {
	60	.mask = TPS65217_INT_USBM,
	61	.interrupt = TPS65217_INT_USBI,
	62	},
	63	};
	64
	65	static void tps65217_irq_lock(struct irq_data *data)
	66	{
	67	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	68
	69	mutex_lock(&tps->irq_lock);
	70	}
	71
	72	static void tps65217_irq_sync_unlock(struct irq_data *data)
	73	{
	74	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	75	int ret;
	76
	77	ret = tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask,
	78	TPS65217_PROTECT_NONE);
	79	if (ret != 0)
	80	dev_err(tps->dev, "Failed to sync IRQ masks\n");
	81
	82	mutex_unlock(&tps->irq_lock);
	83	}
	84
b4feabe9	85	static inline const struct tps65217_irq *
6556bdac MN	86	irq_to_tps65217_irq(struct tps65217 tps, struct irq_data data)
	87	{
	88	return &tps65217_irqs[data->hwirq];
	89	}
	90
	91	static void tps65217_irq_enable(struct irq_data *data)
	92	{
	93	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	94	const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data);
	95
	96	tps->irq_mask &= ~irq_data->mask;
	97	}
	98
	99	static void tps65217_irq_disable(struct irq_data *data)
	100	{
	101	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
	102	const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data);
	103
	104	tps->irq_mask \|= irq_data->mask;
	105	}
	106
	107	static struct irq_chip tps65217_irq_chip = {
	108	.irq_bus_lock = tps65217_irq_lock,
	109	.irq_bus_sync_unlock = tps65217_irq_sync_unlock,
	110	.irq_enable = tps65217_irq_enable,
	111	.irq_disable = tps65217_irq_disable,
	112	};
	113
	114	static struct mfd_cell tps65217s[] = {
817bb7fb AC	115	{
817bb7fb AC	116	.name = "tps65217-pmic",
11d0d300	117	.of_compatible = "ti,tps65217-pmic",
817bb7fb	118	},
b6290ffe MK	119	{
b6290ffe MK	120	.name = "tps65217-bl",
11d0d300	121	.of_compatible = "ti,tps65217-bl",
b6290ffe	122	},
55cec67a EBS	123	{
55cec67a EBS	124	.name = "tps65217-charger",
6556bdac MN	125	.num_resources = ARRAY_SIZE(charger_resources),
6556bdac MN	126	.resources = charger_resources,
55cec67a EBS	127	.of_compatible = "ti,tps65217-charger",
55cec67a EBS	128	},
dea9c730 MN	129	{
	130	.name = "tps65217-pwrbutton",
	131	.num_resources = ARRAY_SIZE(pb_resources),
	132	.resources = pb_resources,
	133	.of_compatible = "ti,tps65217-pwrbutton",
	134	},
817bb7fb AC	135	};
817bb7fb AC	136
6556bdac MN	137	static irqreturn_t tps65217_irq_thread(int irq, void *data)
	138	{
	139	struct tps65217 *tps = data;
	140	unsigned int status;
	141	bool handled = false;
	142	int i;
	143	int ret;
	144
	145	ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
	146	if (ret < 0) {
	147	dev_err(tps->dev, "Failed to read IRQ status: %d\n",
	148	ret);
	149	return IRQ_NONE;
	150	}
	151
	152	for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) {
	153	if (status & tps65217_irqs[i].interrupt) {
	154	handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
	155	handled = true;
	156	}
	157	}
	158
	159	if (handled)
	160	return IRQ_HANDLED;
	161
	162	return IRQ_NONE;
	163	}
	164
	165	static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
	166	irq_hw_number_t hw)
	167	{
	168	struct tps65217 *tps = h->host_data;
	169
	170	irq_set_chip_data(virq, tps);
	171	irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
	172	irq_set_nested_thread(virq, 1);
	173	irq_set_parent(virq, tps->irq);
	174	irq_set_noprobe(virq);
	175
	176	return 0;
	177	}
	178
	179	static const struct irq_domain_ops tps65217_irq_domain_ops = {
	180	.map = tps65217_irq_map,
	181	};
	182
	183	static int tps65217_irq_init(struct tps65217 *tps, int irq)
	184	{
	185	int ret;
	186
	187	mutex_init(&tps->irq_lock);
	188	tps->irq = irq;
	189
	190	/* Mask all interrupt sources */
	191	tps->irq_mask = (TPS65217_INT_RESERVEDM \| TPS65217_INT_PBM
	192	\| TPS65217_INT_ACM \| TPS65217_INT_USBM);
	193	tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask,
	194	TPS65217_PROTECT_NONE);
	195
	196	tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
	197	TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
	198	if (!tps->irq_domain) {
	199	dev_err(tps->dev, "Could not create IRQ domain\n");
	200	return -ENOMEM;
201	}
202
203	ret = devm_request_threaded_irq(tps->dev, irq, NULL,
204	tps65217_irq_thread, IRQF_ONESHOT,
205	"tps65217-irq", tps);
206	if (ret) {
207	dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
208	irq, ret);
209	return ret;
210	}
211
212	return 0;
213	}
214
d48f411c AC	215	/**
	216	* tps65217_reg_read: Read a single tps65217 register.
	217	*
	218	* @tps: Device to read from.
	219	* @reg: Register to read.
	220	* @val: Contians the value
	221	*/
	222	int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
	223	unsigned int *val)
	224	{
	225	return regmap_read(tps->regmap, reg, val);
	226	}
	227	EXPORT_SYMBOL_GPL(tps65217_reg_read);
	228
	229	/**
	230	* tps65217_reg_write: Write a single tps65217 register.
	231	*
	232	* @tps65217: Device to write to.
	233	* @reg: Register to write to.
	234	* @val: Value to write.
	235	* @level: Password protected level
	236	*/
	237	int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
	238	unsigned int val, unsigned int level)
	239	{
	240	int ret;
	241	unsigned int xor_reg_val;
	242
	243	switch (level) {
	244	case TPS65217_PROTECT_NONE:
	245	return regmap_write(tps->regmap, reg, val);
	246	case TPS65217_PROTECT_L1:
	247	xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
	248	ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
	249	xor_reg_val);
	250	if (ret < 0)
	251	return ret;
	252
	253	return regmap_write(tps->regmap, reg, val);
	254	case TPS65217_PROTECT_L2:
	255	xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
	256	ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
	257	xor_reg_val);
	258	if (ret < 0)
	259	return ret;
	260	ret = regmap_write(tps->regmap, reg, val);
	261	if (ret < 0)
	262	return ret;
	263	ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
	264	xor_reg_val);
	265	if (ret < 0)
	266	return ret;
	267	return regmap_write(tps->regmap, reg, val);
	268	default:
	269	return -EINVAL;
	270	}
	271	}
	272	EXPORT_SYMBOL_GPL(tps65217_reg_write);
	273
	274	/**
	275	* tps65217_update_bits: Modify bits w.r.t mask, val and level.
	276	*
	277	* @tps65217: Device to write to.
	278	* @reg: Register to read-write to.
279	* @mask: Mask.
280	* @val: Value to write.
281	* @level: Password protected level
282	*/
27757e82	283	static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
d48f411c AC	284	unsigned int mask, unsigned int val, unsigned int level)
	285	{
	286	int ret;
	287	unsigned int data;
	288
	289	ret = tps65217_reg_read(tps, reg, &data);
	290	if (ret) {
	291	dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
	292	return ret;
	293	}
	294
	295	data &= ~mask;
	296	data \|= val & mask;
	297
	298	ret = tps65217_reg_write(tps, reg, data, level);
	299	if (ret)
	300	dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
	301
	302	return ret;
	303	}
	304
	305	int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
	306	unsigned int mask, unsigned int val, unsigned int level)
	307	{
	308	return tps65217_update_bits(tps, reg, mask, val, level);
	309	}
	310	EXPORT_SYMBOL_GPL(tps65217_set_bits);
	311
	312	int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
	313	unsigned int mask, unsigned int level)
	314	{
	315	return tps65217_update_bits(tps, reg, mask, 0, level);
	316	}
	317	EXPORT_SYMBOL_GPL(tps65217_clear_bits);
	318
6556bdac MN	319	static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
	320	{
	321	switch (reg) {
	322	case TPS65217_REG_INT:
	323	return true;
	324	default:
	325	return false;
	326	}
	327	}
	328
af0a837d	329	static const struct regmap_config tps65217_regmap_config = {
d48f411c AC	330	.reg_bits = 8,
d48f411c AC	331	.val_bits = 8,
0b496b4c MB	332
0b496b4c MB	333	.max_register = TPS65217_REG_MAX,
6556bdac	334	.volatile_reg = tps65217_volatile_reg,
d48f411c AC	335	};
d48f411c AC	336
817bb7fb AC	337	static const struct of_device_id tps65217_of_match[] = {
	338	{ .compatible = "ti,tps65217", .data = (void *)TPS65217 },
	339	{ /* sentinel */ },
	340	};
4895e493	341	MODULE_DEVICE_TABLE(of, tps65217_of_match);
817bb7fb	342
f791be49	343	static int tps65217_probe(struct i2c_client *client,
d48f411c AC	344	const struct i2c_device_id *ids)
	345	{
	346	struct tps65217 *tps;
d48f411c	347	unsigned int version;
5c6fbd56	348	unsigned long chip_id = ids->driver_data;
817bb7fb	349	const struct of_device_id *match;
eb433dad	350	bool status_off = false;
817bb7fb	351	int ret;
d48f411c	352
817bb7fb AC	353	if (client->dev.of_node) {
	354	match = of_match_device(tps65217_of_match, &client->dev);
	355	if (!match) {
	356	dev_err(&client->dev,
	357	"Failed to find matching dt id\n");
	358	return -EINVAL;
	359	}
5c6fbd56	360	chip_id = (unsigned long)match->data;
eb433dad CFP	361	status_off = of_property_read_bool(client->dev.of_node,
eb433dad CFP	362	"ti,pmic-shutdown-controller");
817bb7fb AC	363	}
	364
	365	if (!chip_id) {
	366	dev_err(&client->dev, "id is null.\n");
	367	return -ENODEV;
	368	}
a7f1b63e	369
d48f411c AC	370	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
	371	if (!tps)
	372	return -ENOMEM;
	373
817bb7fb AC	374	i2c_set_clientdata(client, tps);
	375	tps->dev = &client->dev;
	376	tps->id = chip_id;
	377
0ef4619c	378	tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
d48f411c AC	379	if (IS_ERR(tps->regmap)) {
	380	ret = PTR_ERR(tps->regmap);
	381	dev_err(tps->dev, "Failed to allocate register map: %d\n",
	382	ret);
	383	return ret;
	384	}
	385
6556bdac MN	386	if (client->irq) {
	387	tps65217_irq_init(tps, client->irq);
	388	} else {
	389	int i;
	390
	391	/* Don't tell children about IRQ resources which won't fire */
	392	for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
	393	tps65217s[i].num_resources = 0;
	394	}
	395
b89b6b6b	396	ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
6556bdac MN	397	ARRAY_SIZE(tps65217s), NULL, 0,
6556bdac MN	398	tps->irq_domain);
817bb7fb AC	399	if (ret < 0) {
	400	dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
	401	return ret;
	402	}
d48f411c AC	403
	404	ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
	405	if (ret < 0) {
0ef4619c AL	406	dev_err(tps->dev, "Failed to read revision register: %d\n",
	407	ret);
	408	return ret;
d48f411c AC	409	}
d48f411c AC	410
eb433dad CFP	411	/* Set the PMIC to shutdown on PWR_EN toggle */
	412	if (status_off) {
	413	ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
	414	TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
	415	TPS65217_PROTECT_NONE);
	416	if (ret)
	417	dev_warn(tps->dev, "unable to set the status OFF\n");
	418	}
	419
d48f411c AC	420	dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
	421	(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
	422	version & TPS65217_CHIPID_REV_MASK);
	423
d48f411c	424	return 0;
d48f411c AC	425	}
d48f411c AC	426
d48f411c	427	static const struct i2c_device_id tps65217_id_table[] = {
817bb7fb AC	428	{"tps65217", TPS65217},
817bb7fb AC	429	{ /* sentinel */ }
d48f411c AC	430	};
	431	MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
	432
	433	static struct i2c_driver tps65217_driver = {
	434	.driver = {
	435	.name = "tps65217",
a351451a	436	.of_match_table = tps65217_of_match,
d48f411c AC	437	},
	438	.id_table = tps65217_id_table,
	439	.probe = tps65217_probe,
d48f411c AC	440	};
	441
	442	static int __init tps65217_init(void)
	443	{
	444	return i2c_add_driver(&tps65217_driver);
	445	}
	446	subsys_initcall(tps65217_init);
	447
	448	static void __exit tps65217_exit(void)
	449	{
	450	i2c_del_driver(&tps65217_driver);
	451	}
	452	module_exit(tps65217_exit);
	453
	454	MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
	455	MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
	456	MODULE_LICENSE("GPL v2");