[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / tps6586x.c

/*
 * Core driver for TI TPS6586x PMIC family
 *
 * Copyright (c) 2010 CompuLab Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 *
 * Based on da903x.c.
 * Copyright (C) 2008 Compulab, Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 * Copyright (C) 2006-2008 Marvell International Ltd.
 * Eric Miao <eric.miao@marvell.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.
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>

#define TPS6586X_SUPPLYENE	0x14
#define EXITSLREQ_BIT		BIT(1)
#define SLEEP_MODE_BIT		BIT(3)

/* interrupt control registers */
#define TPS6586X_INT_ACK1	0xb5
#define TPS6586X_INT_ACK2	0xb6
#define TPS6586X_INT_ACK3	0xb7
#define TPS6586X_INT_ACK4	0xb8

/* interrupt mask registers */
#define TPS6586X_INT_MASK1	0xb0
#define TPS6586X_INT_MASK2	0xb1
#define TPS6586X_INT_MASK3	0xb2
#define TPS6586X_INT_MASK4	0xb3
#define TPS6586X_INT_MASK5	0xb4

/* device id */
#define TPS6586X_VERSIONCRC	0xcd

/* Maximum register */
#define TPS6586X_MAX_REGISTER	(TPS6586X_VERSIONCRC + 1)

struct tps6586x_irq_data {
	u8	mask_reg;
	u8	mask_mask;
};

#define TPS6586X_IRQ(_reg, _mask)				\
	{							\
		.mask_reg = (_reg) - TPS6586X_INT_MASK1,	\
		.mask_mask = (_mask),				\
	}

static const struct tps6586x_irq_data tps6586x_irqs[] = {
	[TPS6586X_INT_PLDO_0]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	[TPS6586X_INT_PLDO_1]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	[TPS6586X_INT_PLDO_2]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	[TPS6586X_INT_PLDO_3]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	[TPS6586X_INT_PLDO_4]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	[TPS6586X_INT_PLDO_5]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	[TPS6586X_INT_PLDO_6]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	[TPS6586X_INT_PLDO_7]	= TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	[TPS6586X_INT_COMP_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	[TPS6586X_INT_ADC]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	[TPS6586X_INT_PLDO_8]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	[TPS6586X_INT_PLDO_9]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	[TPS6586X_INT_PSM_0]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	[TPS6586X_INT_PSM_1]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	[TPS6586X_INT_PSM_2]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	[TPS6586X_INT_PSM_3]	= TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	[TPS6586X_INT_RTC_ALM1]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	[TPS6586X_INT_USB_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	[TPS6586X_INT_AC_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	[TPS6586X_INT_BAT_DET]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	[TPS6586X_INT_CHG_STAT]	= TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	[TPS6586X_INT_CHG_TEMP]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	[TPS6586X_INT_PP]	= TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	[TPS6586X_INT_RESUME]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	[TPS6586X_INT_LOW_SYS]	= TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
};

static struct resource tps6586x_rtc_resources[] = {
	{
		.start  = TPS6586X_INT_RTC_ALM1,
		.end	= TPS6586X_INT_RTC_ALM1,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct mfd_cell tps6586x_cell[] = {
	{
		.name = "tps6586x-gpio",
	},
	{
		.name = "tps6586x-regulator",
	},
	{
		.name = "tps6586x-rtc",
		.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
		.resources = &tps6586x_rtc_resources[0],
	},
	{
		.name = "tps6586x-onkey",
	},
};

struct tps6586x {
	struct device		*dev;
	struct i2c_client	*client;
	struct regmap		*regmap;

	int			irq;
	struct irq_chip		irq_chip;
	struct mutex		irq_lock;
	int			irq_base;
	u32			irq_en;
	u8			mask_reg[5];
	struct irq_domain	*irq_domain;
};

static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
{
	return i2c_get_clientdata(to_i2c_client(dev));
}

int tps6586x_write(struct device *dev, int reg, uint8_t val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_write(tps6586x->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(tps6586x_write);

int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_writes);

int tps6586x_read(struct device *dev, int reg, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	unsigned int rval;
	int ret;

	ret = regmap_read(tps6586x->regmap, reg, &rval);
	if (!ret)
		*val = rval;
	return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_read);

int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
}
EXPORT_SYMBOL_GPL(tps6586x_reads);

int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
}
EXPORT_SYMBOL_GPL(tps6586x_set_bits);

int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
}
EXPORT_SYMBOL_GPL(tps6586x_clr_bits);

int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(tps6586x_update);

int tps6586x_irq_get_virq(struct device *dev, int irq)
{
	struct tps6586x *tps6586x = dev_to_tps6586x(dev);

	return irq_create_mapping(tps6586x->irq_domain, irq);
}
EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);

static int __remove_subdev(struct device *dev, void *unused)
{
	platform_device_unregister(to_platform_device(dev));
	return 0;
}

static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
{
	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
}

static void tps6586x_irq_lock(struct irq_data *data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);

	mutex_lock(&tps6586x->irq_lock);
}

static void tps6586x_irq_enable(struct irq_data *irq_data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->hwirq;
	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];

	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	tps6586x->irq_en |= (1 << __irq);
}

static void tps6586x_irq_disable(struct irq_data *irq_data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);

	unsigned int __irq = irq_data->hwirq;
	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];

	tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
	tps6586x->irq_en &= ~(1 << __irq);
}

static void tps6586x_irq_sync_unlock(struct irq_data *data)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
	int i;

	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
		int ret;
		ret = tps6586x_write(tps6586x->dev,
					    TPS6586X_INT_MASK1 + i,
					    tps6586x->mask_reg[i]);
		WARN_ON(ret);
	}

	mutex_unlock(&tps6586x->irq_lock);
}

#ifdef CONFIG_PM_SLEEP
static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
{
	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	return irq_set_irq_wake(tps6586x->irq, on);
}
#else
#define tps6586x_irq_set_wake NULL
#endif

static struct irq_chip tps6586x_irq_chip = {
	.name = "tps6586x",
	.irq_bus_lock = tps6586x_irq_lock,
	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	.irq_disable = tps6586x_irq_disable,
	.irq_enable = tps6586x_irq_enable,
	.irq_set_wake = tps6586x_irq_set_wake,
};

static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
				irq_hw_number_t hw)
{
	struct tps6586x *tps6586x = h->host_data;

	irq_set_chip_data(virq, tps6586x);
	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	irq_set_nested_thread(virq, 1);

	/* ARM needs us to explicitly flag the IRQ as valid
	 * and will set them noprobe when we do so. */
#ifdef CONFIG_ARM
	set_irq_flags(virq, IRQF_VALID);
#else
	irq_set_noprobe(virq);
#endif

	return 0;
}

static struct irq_domain_ops tps6586x_domain_ops = {
	.map    = tps6586x_irq_map,
	.xlate  = irq_domain_xlate_twocell,
};

static irqreturn_t tps6586x_irq(int irq, void *data)
{
	struct tps6586x *tps6586x = data;
	u32 acks;
	int ret = 0;

	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
			     sizeof(acks), (uint8_t *)&acks);

	if (ret < 0) {
		dev_err(tps6586x->dev, "failed to read interrupt status\n");
		return IRQ_NONE;
	}

	acks = le32_to_cpu(acks);

	while (acks) {
		int i = __ffs(acks);

		if (tps6586x->irq_en & (1 << i))
			handle_nested_irq(
				irq_find_mapping(tps6586x->irq_domain, i));

		acks &= ~(1 << i);
	}

	return IRQ_HANDLED;
}

static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
				       int irq_base)
{
	int i, ret;
	u8 tmp[4];
	int new_irq_base;
	int irq_num = ARRAY_SIZE(tps6586x_irqs);

	tps6586x->irq = irq;

	mutex_init(&tps6586x->irq_lock);
	for (i = 0; i < 5; i++) {
		tps6586x->mask_reg[i] = 0xff;
		tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	}

	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);

	if  (irq_base > 0) {
		new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
		if (new_irq_base < 0) {
			dev_err(tps6586x->dev,
				"Failed to alloc IRQs: %d\n", new_irq_base);
			return new_irq_base;
		}
	} else {
		new_irq_base = 0;
	}

	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
				irq_num, new_irq_base, &tps6586x_domain_ops,
				tps6586x);
	if (!tps6586x->irq_domain) {
		dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
		return -ENOMEM;
	}
	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
				   "tps6586x", tps6586x);

	if (!ret)
		device_init_wakeup(tps6586x->dev, 1);

	return ret;
}

static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
					  struct tps6586x_platform_data *pdata)
{
	struct tps6586x_subdev_info *subdev;
	struct platform_device *pdev;
	int i, ret = 0;

	for (i = 0; i < pdata->num_subdevs; i++) {
		subdev = &pdata->subdevs[i];

		pdev = platform_device_alloc(subdev->name, subdev->id);
		if (!pdev) {
			ret = -ENOMEM;
			goto failed;
		}

		pdev->dev.parent = tps6586x->dev;
		pdev->dev.platform_data = subdev->platform_data;
		pdev->dev.of_node = subdev->of_node;

		ret = platform_device_add(pdev);
		if (ret) {
			platform_device_put(pdev);
			goto failed;
		}
	}
	return 0;

failed:
	tps6586x_remove_subdevs(tps6586x);
	return ret;
}

#ifdef CONFIG_OF
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
{
	struct device_node *np = client->dev.of_node;
	struct tps6586x_platform_data *pdata;

	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		dev_err(&client->dev, "Memory allocation failed\n");
		return NULL;
	}

	pdata->num_subdevs = 0;
	pdata->subdevs = NULL;
	pdata->gpio_base = -1;
	pdata->irq_base = -1;
	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");

	return pdata;
}

static struct of_device_id tps6586x_of_match[] = {
	{ .compatible = "ti,tps6586x", },
	{ },
};
#else
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
{
	return NULL;
}
#endif

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	/* Cache all interrupt mask register */
	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
		return false;

	return true;
}

static const struct regmap_config tps6586x_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TPS6586X_MAX_REGISTER - 1,
	.volatile_reg = is_volatile_reg,
	.cache_type = REGCACHE_RBTREE,
};

static struct device *tps6586x_dev;
static void tps6586x_power_off(void)
{
	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
		return;

	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
}

static int tps6586x_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
	struct tps6586x *tps6586x;
	int ret;

	if (!pdata && client->dev.of_node)
		pdata = tps6586x_parse_dt(client);

	if (!pdata) {
		dev_err(&client->dev, "tps6586x requires platform data\n");
		return -ENOTSUPP;
	}

	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	if (ret < 0) {
		dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
		return -EIO;
	}

	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);

	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	if (tps6586x == NULL) {
		dev_err(&client->dev, "memory for tps6586x alloc failed\n");
		return -ENOMEM;
	}

	tps6586x->client = client;
	tps6586x->dev = &client->dev;
	i2c_set_clientdata(client, tps6586x);

	tps6586x->regmap = devm_regmap_init_i2c(client,
					&tps6586x_regmap_config);
	if (IS_ERR(tps6586x->regmap)) {
		ret = PTR_ERR(tps6586x->regmap);
		dev_err(&client->dev, "regmap init failed: %d\n", ret);
		return ret;
	}


	if (client->irq) {
		ret = tps6586x_irq_init(tps6586x, client->irq,
					pdata->irq_base);
		if (ret) {
			dev_err(&client->dev, "IRQ init failed: %d\n", ret);
			return ret;
		}
	}

	ret = mfd_add_devices(tps6586x->dev, -1,
			      tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
			      NULL, 0, tps6586x->irq_domain);
	if (ret < 0) {
		dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
		goto err_mfd_add;
	}

	ret = tps6586x_add_subdevs(tps6586x, pdata);
	if (ret) {
		dev_err(&client->dev, "add devices failed: %d\n", ret);
		goto err_add_devs;
	}

	if (pdata->pm_off && !pm_power_off) {
		tps6586x_dev = &client->dev;
		pm_power_off = tps6586x_power_off;
	}

	return 0;

err_add_devs:
	mfd_remove_devices(tps6586x->dev);
err_mfd_add:
	if (client->irq)
		free_irq(client->irq, tps6586x);
	return ret;
}

static int tps6586x_i2c_remove(struct i2c_client *client)
{
	struct tps6586x *tps6586x = i2c_get_clientdata(client);

	tps6586x_remove_subdevs(tps6586x);
	mfd_remove_devices(tps6586x->dev);
	if (client->irq)
		free_irq(client->irq, tps6586x);
	return 0;
}

static const struct i2c_device_id tps6586x_id_table[] = {
	{ "tps6586x", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);

static struct i2c_driver tps6586x_driver = {
	.driver	= {
		.name	= "tps6586x",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(tps6586x_of_match),
	},
	.probe		= tps6586x_i2c_probe,
	.remove		= tps6586x_i2c_remove,
	.id_table	= tps6586x_id_table,
};

static int __init tps6586x_init(void)
{
	return i2c_add_driver(&tps6586x_driver);
}
subsys_initcall(tps6586x_init);

static void __exit tps6586x_exit(void)
{
	i2c_del_driver(&tps6586x_driver);
}
module_exit(tps6586x_exit);

MODULE_DESCRIPTION("TPS6586X core driver");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
MODULE_LICENSE("GPL");
Commit	Line	Data
c6c19332 MR	1	/*
	2	* Core driver for TI TPS6586x PMIC family
	3	*
	4	* Copyright (c) 2010 CompuLab Ltd.
	5	* Mike Rapoport <mike@compulab.co.il>
	6	*
	7	* Based on da903x.c.
	8	* Copyright (C) 2008 Compulab, Ltd.
	9	* Mike Rapoport <mike@compulab.co.il>
	10	* Copyright (C) 2006-2008 Marvell International Ltd.
	11	* Eric Miao <eric.miao@marvell.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2 as
	15	* published by the Free Software Foundation.
	16	*/
	17
c26448c4 GK	18	#include <linux/interrupt.h>
c26448c4 GK	19	#include <linux/irq.h>
605511a8	20	#include <linux/irqdomain.h>
c6c19332 MR	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/mutex.h>
	24	#include <linux/slab.h>
1176b5be	25	#include <linux/err.h>
c6c19332	26	#include <linux/i2c.h>
605511a8	27	#include <linux/platform_device.h>
1176b5be	28	#include <linux/regmap.h>
c6c19332 MR	29
	30	#include <linux/mfd/core.h>
	31	#include <linux/mfd/tps6586x.h>
	32
004c15a6 BH	33	#define TPS6586X_SUPPLYENE 0x14
	34	#define EXITSLREQ_BIT BIT(1)
	35	#define SLEEP_MODE_BIT BIT(3)
	36
c26448c4 GK	37	/* interrupt control registers */
	38	#define TPS6586X_INT_ACK1 0xb5
	39	#define TPS6586X_INT_ACK2 0xb6
	40	#define TPS6586X_INT_ACK3 0xb7
	41	#define TPS6586X_INT_ACK4 0xb8
	42
	43	/* interrupt mask registers */
	44	#define TPS6586X_INT_MASK1 0xb0
	45	#define TPS6586X_INT_MASK2 0xb1
	46	#define TPS6586X_INT_MASK3 0xb2
	47	#define TPS6586X_INT_MASK4 0xb3
	48	#define TPS6586X_INT_MASK5 0xb4
	49
c6c19332 MR	50	/* device id */
c6c19332 MR	51	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	52
1176b5be LD	53	/* Maximum register */
	54	#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
	55
c26448c4 GK	56	struct tps6586x_irq_data {
	57	u8 mask_reg;
	58	u8 mask_mask;
	59	};
	60
	61	#define TPS6586X_IRQ(_reg, _mask) \
	62	{ \
	63	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	64	.mask_mask = (_mask), \
	65	}
	66
	67	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	68	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	69	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	70	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	71	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	72	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	73	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	74	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	75	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	76	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	77	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	78	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	79	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	80	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	81	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	82	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	83	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	84	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	85	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	86	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	87	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	88	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	89	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	90	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	91	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	92	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	93	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	94	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	95	};
	96
5b8b1fe2 LD	97	static struct resource tps6586x_rtc_resources[] = {
	98	{
	99	.start = TPS6586X_INT_RTC_ALM1,
	100	.end = TPS6586X_INT_RTC_ALM1,
	101	.flags = IORESOURCE_IRQ,
	102	},
	103	};
	104
7a7487cb LD	105	static struct mfd_cell tps6586x_cell[] = {
	106	{
	107	.name = "tps6586x-gpio",
	108	},
64e48160	109	{
ec8da805	110	.name = "tps6586x-regulator",
64e48160	111	},
7a7487cb LD	112	{
7a7487cb LD	113	.name = "tps6586x-rtc",
5b8b1fe2 LD	114	.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
5b8b1fe2 LD	115	.resources = &tps6586x_rtc_resources[0],
7a7487cb LD	116	},
	117	{
	118	.name = "tps6586x-onkey",
	119	},
	120	};
	121
c6c19332	122	struct tps6586x {
c6c19332 MR	123	struct device *dev;
c6c19332 MR	124	struct i2c_client *client;
1176b5be	125	struct regmap *regmap;
c6c19332	126
234506ad	127	int irq;
c26448c4 GK	128	struct irq_chip irq_chip;
	129	struct mutex irq_lock;
	130	int irq_base;
	131	u32 irq_en;
c26448c4	132	u8 mask_reg[5];
605511a8	133	struct irq_domain *irq_domain;
c6c19332 MR	134	};
c6c19332 MR	135
1176b5be	136	static inline struct tps6586x dev_to_tps6586x(struct device dev)
c6c19332	137	{
1176b5be	138	return i2c_get_clientdata(to_i2c_client(dev));
c6c19332 MR	139	}
	140
	141	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	142	{
1176b5be LD	143	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	144
	145	return regmap_write(tps6586x->regmap, reg, val);
c6c19332 MR	146	}
	147	EXPORT_SYMBOL_GPL(tps6586x_write);
	148
	149	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	150	{
1176b5be LD	151	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	152
	153	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
c6c19332 MR	154	}
	155	EXPORT_SYMBOL_GPL(tps6586x_writes);
	156
	157	int tps6586x_read(struct device dev, int reg, uint8_t val)
	158	{
1176b5be LD	159	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	160	unsigned int rval;
	161	int ret;
	162
	163	ret = regmap_read(tps6586x->regmap, reg, &rval);
	164	if (!ret)
	165	*val = rval;
	166	return ret;
c6c19332 MR	167	}
	168	EXPORT_SYMBOL_GPL(tps6586x_read);
	169
	170	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
	171	{
1176b5be LD	172	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	173
	174	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
c6c19332 MR	175	}
	176	EXPORT_SYMBOL_GPL(tps6586x_reads);
	177
	178	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	179	{
1176b5be	180	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	181
1176b5be	182	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
c6c19332 MR	183	}
	184	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	185
	186	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	187	{
1176b5be	188	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	189
1176b5be	190	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
c6c19332 MR	191	}
	192	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	193
	194	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	195	{
1176b5be	196	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	197
1176b5be	198	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
c6c19332 MR	199	}
	200	EXPORT_SYMBOL_GPL(tps6586x_update);
	201
605511a8 LD	202	int tps6586x_irq_get_virq(struct device *dev, int irq)
	203	{
	204	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	205
	206	return irq_create_mapping(tps6586x->irq_domain, irq);
	207	}
	208	EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
	209
c6c19332 MR	210	static int __remove_subdev(struct device dev, void unused)
	211	{
	212	platform_device_unregister(to_platform_device(dev));
	213	return 0;
	214	}
	215
	216	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	217	{
	218	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	219	}
	220
96e824bd	221	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	222	{
96e824bd	223	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	224
	225	mutex_lock(&tps6586x->irq_lock);
	226	}
	227
96e824bd	228	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	229	{
96e824bd	230	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
605511a8	231	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	232	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	233
	234	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	235	tps6586x->irq_en \|= (1 << __irq);
	236	}
	237
96e824bd	238	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	239	{
96e824bd	240	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	241
605511a8	242	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	243	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	244
	245	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	246	tps6586x->irq_en &= ~(1 << __irq);
	247	}
	248
96e824bd	249	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	250	{
96e824bd	251	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	252	int i;
	253
	254	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
75edd5af LD	255	int ret;
	256	ret = tps6586x_write(tps6586x->dev,
	257	TPS6586X_INT_MASK1 + i,
	258	tps6586x->mask_reg[i]);
	259	WARN_ON(ret);
c26448c4 GK	260	}
	261
	262	mutex_unlock(&tps6586x->irq_lock);
	263	}
	264
234506ad SW	265	#ifdef CONFIG_PM_SLEEP
	266	static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
	267	{
	268	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	269	return irq_set_irq_wake(tps6586x->irq, on);
	270	}
	271	#else
	272	#define tps6586x_irq_set_wake NULL
	273	#endif
	274
605511a8 LD	275	static struct irq_chip tps6586x_irq_chip = {
	276	.name = "tps6586x",
	277	.irq_bus_lock = tps6586x_irq_lock,
	278	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	279	.irq_disable = tps6586x_irq_disable,
	280	.irq_enable = tps6586x_irq_enable,
234506ad	281	.irq_set_wake = tps6586x_irq_set_wake,
605511a8 LD	282	};
	283
	284	static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
	285	irq_hw_number_t hw)
	286	{
	287	struct tps6586x *tps6586x = h->host_data;
	288
	289	irq_set_chip_data(virq, tps6586x);
	290	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	291	irq_set_nested_thread(virq, 1);
	292
	293	/* ARM needs us to explicitly flag the IRQ as valid
	294	* and will set them noprobe when we do so. */
	295	#ifdef CONFIG_ARM
	296	set_irq_flags(virq, IRQF_VALID);
	297	#else
	298	irq_set_noprobe(virq);
	299	#endif
	300
	301	return 0;
	302	}
	303
	304	static struct irq_domain_ops tps6586x_domain_ops = {
	305	.map = tps6586x_irq_map,
	306	.xlate = irq_domain_xlate_twocell,
	307	};
	308
c26448c4 GK	309	static irqreturn_t tps6586x_irq(int irq, void *data)
	310	{
	311	struct tps6586x *tps6586x = data;
	312	u32 acks;
	313	int ret = 0;
	314
	315	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	316	sizeof(acks), (uint8_t *)&acks);
	317
	318	if (ret < 0) {
	319	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	320	return IRQ_NONE;
	321	}
	322
	323	acks = le32_to_cpu(acks);
	324
	325	while (acks) {
	326	int i = __ffs(acks);
	327
	328	if (tps6586x->irq_en & (1 << i))
605511a8 LD	329	handle_nested_irq(
605511a8 LD	330	irq_find_mapping(tps6586x->irq_domain, i));
c26448c4 GK	331
	332	acks &= ~(1 << i);
	333	}
	334
	335	return IRQ_HANDLED;
	336	}
	337
f791be49	338	static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
c26448c4 GK	339	int irq_base)
	340	{
	341	int i, ret;
	342	u8 tmp[4];
605511a8 LD	343	int new_irq_base;
605511a8 LD	344	int irq_num = ARRAY_SIZE(tps6586x_irqs);
c26448c4	345
234506ad SW	346	tps6586x->irq = irq;
234506ad SW	347
c26448c4 GK	348	mutex_init(&tps6586x->irq_lock);
c26448c4 GK	349	for (i = 0; i < 5; i++) {
c26448c4 GK	350	tps6586x->mask_reg[i] = 0xff;
	351	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	352	}
	353
	354	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	355
605511a8 LD	356	if (irq_base > 0) {
	357	new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
	358	if (new_irq_base < 0) {
	359	dev_err(tps6586x->dev,
	360	"Failed to alloc IRQs: %d\n", new_irq_base);
	361	return new_irq_base;
	362	}
	363	} else {
	364	new_irq_base = 0;
c26448c4 GK	365	}
c26448c4 GK	366
605511a8 LD	367	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
	368	irq_num, new_irq_base, &tps6586x_domain_ops,
	369	tps6586x);
	370	if (!tps6586x->irq_domain) {
	371	dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
	372	return -ENOMEM;
	373	}
c26448c4 GK	374	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	375	"tps6586x", tps6586x);
	376
234506ad	377	if (!ret)
c26448c4	378	device_init_wakeup(tps6586x->dev, 1);
c26448c4 GK	379
	380	return ret;
	381	}
	382
f791be49	383	static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
c6c19332 MR	384	struct tps6586x_platform_data *pdata)
	385	{
	386	struct tps6586x_subdev_info *subdev;
	387	struct platform_device *pdev;
	388	int i, ret = 0;
	389
	390	for (i = 0; i < pdata->num_subdevs; i++) {
	391	subdev = &pdata->subdevs[i];
	392
	393	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	394	if (!pdev) {
	395	ret = -ENOMEM;
	396	goto failed;
	397	}
c6c19332 MR	398
	399	pdev->dev.parent = tps6586x->dev;
	400	pdev->dev.platform_data = subdev->platform_data;
62f6b087	401	pdev->dev.of_node = subdev->of_node;
c6c19332 MR	402
c6c19332 MR	403	ret = platform_device_add(pdev);
929980ab AL	404	if (ret) {
929980ab AL	405	platform_device_put(pdev);
c6c19332	406	goto failed;
929980ab	407	}
c6c19332 MR	408	}
	409	return 0;
	410
	411	failed:
	412	tps6586x_remove_subdevs(tps6586x);
	413	return ret;
	414	}
	415
62f6b087	416	#ifdef CONFIG_OF
62f6b087 TR	417	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
62f6b087 TR	418	{
62f6b087 TR	419	struct device_node *np = client->dev.of_node;
62f6b087 TR	420	struct tps6586x_platform_data *pdata;
62f6b087 TR	421
62f6b087 TR	422	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
64e48160 LD	423	if (!pdata) {
64e48160 LD	424	dev_err(&client->dev, "Memory allocation failed\n");
62f6b087	425	return NULL;
64e48160	426	}
62f6b087	427
64e48160 LD	428	pdata->num_subdevs = 0;
64e48160 LD	429	pdata->subdevs = NULL;
62f6b087 TR	430	pdata->gpio_base = -1;
62f6b087 TR	431	pdata->irq_base = -1;
004c15a6	432	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
62f6b087 TR	433
	434	return pdata;
	435	}
	436
	437	static struct of_device_id tps6586x_of_match[] = {
	438	{ .compatible = "ti,tps6586x", },
	439	{ },
	440	};
	441	#else
	442	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	443	{
	444	return NULL;
	445	}
	446	#endif
	447
75edd5af LD	448	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	449	{
	450	/* Cache all interrupt mask register */
	451	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
	452	return false;
	453
	454	return true;
	455	}
	456
1176b5be LD	457	static const struct regmap_config tps6586x_regmap_config = {
	458	.reg_bits = 8,
	459	.val_bits = 8,
	460	.max_register = TPS6586X_MAX_REGISTER - 1,
75edd5af LD	461	.volatile_reg = is_volatile_reg,
75edd5af LD	462	.cache_type = REGCACHE_RBTREE,
1176b5be LD	463	};
1176b5be LD	464
004c15a6 BH	465	static struct device *tps6586x_dev;
	466	static void tps6586x_power_off(void)
	467	{
	468	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
	469	return;
	470
	471	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
	472	}
	473
f791be49	474	static int tps6586x_i2c_probe(struct i2c_client *client,
c6c19332 MR	475	const struct i2c_device_id *id)
c6c19332 MR	476	{
334a41ce	477	struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
c6c19332 MR	478	struct tps6586x *tps6586x;
	479	int ret;
	480
62f6b087 TR	481	if (!pdata && client->dev.of_node)
	482	pdata = tps6586x_parse_dt(client);
	483
c6c19332 MR	484	if (!pdata) {
	485	dev_err(&client->dev, "tps6586x requires platform data\n");
	486	return -ENOTSUPP;
	487	}
	488
	489	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	490	if (ret < 0) {
	491	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	492	return -EIO;
	493	}
	494
4d1cdbf6	495	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332	496
b6719412 LD	497	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	498	if (tps6586x == NULL) {
	499	dev_err(&client->dev, "memory for tps6586x alloc failed\n");
c6c19332	500	return -ENOMEM;
b6719412	501	}
c6c19332 MR	502
	503	tps6586x->client = client;
	504	tps6586x->dev = &client->dev;
	505	i2c_set_clientdata(client, tps6586x);
	506
1176b5be LD	507	tps6586x->regmap = devm_regmap_init_i2c(client,
	508	&tps6586x_regmap_config);
	509	if (IS_ERR(tps6586x->regmap)) {
	510	ret = PTR_ERR(tps6586x->regmap);
	511	dev_err(&client->dev, "regmap init failed: %d\n", ret);
	512	return ret;
	513	}
	514
c6c19332	515
c26448c4 GK	516	if (client->irq) {
	517	ret = tps6586x_irq_init(tps6586x, client->irq,
	518	pdata->irq_base);
	519	if (ret) {
	520	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
b6719412	521	return ret;
c26448c4 GK	522	}
	523	}
	524
7a7487cb	525	ret = mfd_add_devices(tps6586x->dev, -1,
0848c94f	526	tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
5b8b1fe2	527	NULL, 0, tps6586x->irq_domain);
7a7487cb LD	528	if (ret < 0) {
	529	dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
	530	goto err_mfd_add;
6f9f13bf VP	531	}
6f9f13bf VP	532
c6c19332 MR	533	ret = tps6586x_add_subdevs(tps6586x, pdata);
	534	if (ret) {
	535	dev_err(&client->dev, "add devices failed: %d\n", ret);
	536	goto err_add_devs;
	537	}
	538
004c15a6 BH	539	if (pdata->pm_off && !pm_power_off) {
	540	tps6586x_dev = &client->dev;
	541	pm_power_off = tps6586x_power_off;
	542	}
	543
c6c19332 MR	544	return 0;
	545
	546	err_add_devs:
7a7487cb LD	547	mfd_remove_devices(tps6586x->dev);
7a7487cb LD	548	err_mfd_add:
c26448c4 GK	549	if (client->irq)
c26448c4 GK	550	free_irq(client->irq, tps6586x);
c6c19332 MR	551	return ret;
	552	}
	553
4740f73f	554	static int tps6586x_i2c_remove(struct i2c_client *client)
c6c19332	555	{
4b751cf5	556	struct tps6586x *tps6586x = i2c_get_clientdata(client);
4b751cf5	557
7a7487cb LD	558	tps6586x_remove_subdevs(tps6586x);
7a7487cb LD	559	mfd_remove_devices(tps6586x->dev);
c26448c4 GK	560	if (client->irq)
c26448c4 GK	561	free_irq(client->irq, tps6586x);
c6c19332 MR	562	return 0;
	563	}
	564
	565	static const struct i2c_device_id tps6586x_id_table[] = {
	566	{ "tps6586x", 0 },
	567	{ },
	568	};
	569	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	570
	571	static struct i2c_driver tps6586x_driver = {
	572	.driver = {
	573	.name = "tps6586x",
	574	.owner = THIS_MODULE,
62f6b087	575	.of_match_table = of_match_ptr(tps6586x_of_match),
c6c19332 MR	576	},
c6c19332 MR	577	.probe = tps6586x_i2c_probe,
84449216	578	.remove = tps6586x_i2c_remove,
c6c19332 MR	579	.id_table = tps6586x_id_table,
	580	};
	581
	582	static int __init tps6586x_init(void)
	583	{
	584	return i2c_add_driver(&tps6586x_driver);
	585	}
	586	subsys_initcall(tps6586x_init);
	587
	588	static void __exit tps6586x_exit(void)
	589	{
	590	i2c_del_driver(&tps6586x_driver);
	591	}
	592	module_exit(tps6586x_exit);
	593
	594	MODULE_DESCRIPTION("TPS6586X core driver");
	595	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	596	MODULE_LICENSE("GPL");