[deliverable/linux.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/of.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>
06bf3c2f	29	#include <linux/of.h>
c6c19332 MR	30
	31	#include <linux/mfd/core.h>
	32	#include <linux/mfd/tps6586x.h>
	33
004c15a6 BH	34	#define TPS6586X_SUPPLYENE 0x14
	35	#define EXITSLREQ_BIT BIT(1)
	36	#define SLEEP_MODE_BIT BIT(3)
	37
c26448c4 GK	38	/* interrupt control registers */
	39	#define TPS6586X_INT_ACK1 0xb5
	40	#define TPS6586X_INT_ACK2 0xb6
	41	#define TPS6586X_INT_ACK3 0xb7
	42	#define TPS6586X_INT_ACK4 0xb8
	43
	44	/* interrupt mask registers */
	45	#define TPS6586X_INT_MASK1 0xb0
	46	#define TPS6586X_INT_MASK2 0xb1
	47	#define TPS6586X_INT_MASK3 0xb2
	48	#define TPS6586X_INT_MASK4 0xb3
	49	#define TPS6586X_INT_MASK5 0xb4
	50
c6c19332 MR	51	/* device id */
c6c19332 MR	52	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	53
1176b5be LD	54	/* Maximum register */
	55	#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
	56
c26448c4 GK	57	struct tps6586x_irq_data {
	58	u8 mask_reg;
	59	u8 mask_mask;
	60	};
	61
	62	#define TPS6586X_IRQ(_reg, _mask) \
	63	{ \
	64	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	65	.mask_mask = (_mask), \
	66	}
	67
	68	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	69	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	70	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	71	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	72	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	73	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	74	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	75	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	76	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	77	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	78	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	79	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	80	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	81	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	82	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	83	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	84	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	85	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	86	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	87	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	88	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	89	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	90	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	91	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	92	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	93	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	94	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	95	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	96	};
	97
5b8b1fe2 LD	98	static struct resource tps6586x_rtc_resources[] = {
	99	{
	100	.start = TPS6586X_INT_RTC_ALM1,
	101	.end = TPS6586X_INT_RTC_ALM1,
	102	.flags = IORESOURCE_IRQ,
	103	},
	104	};
	105
7a7487cb LD	106	static struct mfd_cell tps6586x_cell[] = {
	107	{
	108	.name = "tps6586x-gpio",
	109	},
64e48160	110	{
ec8da805	111	.name = "tps6586x-regulator",
64e48160	112	},
7a7487cb LD	113	{
7a7487cb LD	114	.name = "tps6586x-rtc",
5b8b1fe2 LD	115	.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
5b8b1fe2 LD	116	.resources = &tps6586x_rtc_resources[0],
7a7487cb LD	117	},
	118	{
	119	.name = "tps6586x-onkey",
	120	},
	121	};
	122
c6c19332	123	struct tps6586x {
c6c19332 MR	124	struct device *dev;
c6c19332 MR	125	struct i2c_client *client;
1176b5be	126	struct regmap *regmap;
c6c19332	127
234506ad	128	int irq;
c26448c4 GK	129	struct irq_chip irq_chip;
	130	struct mutex irq_lock;
	131	int irq_base;
	132	u32 irq_en;
c26448c4	133	u8 mask_reg[5];
605511a8	134	struct irq_domain *irq_domain;
c6c19332 MR	135	};
c6c19332 MR	136
1176b5be	137	static inline struct tps6586x dev_to_tps6586x(struct device dev)
c6c19332	138	{
1176b5be	139	return i2c_get_clientdata(to_i2c_client(dev));
c6c19332 MR	140	}
	141
	142	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	143	{
1176b5be LD	144	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	145
	146	return regmap_write(tps6586x->regmap, reg, val);
c6c19332 MR	147	}
	148	EXPORT_SYMBOL_GPL(tps6586x_write);
	149
	150	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	151	{
1176b5be LD	152	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	153
	154	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
c6c19332 MR	155	}
	156	EXPORT_SYMBOL_GPL(tps6586x_writes);
	157
	158	int tps6586x_read(struct device dev, int reg, uint8_t val)
	159	{
1176b5be LD	160	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	161	unsigned int rval;
	162	int ret;
	163
	164	ret = regmap_read(tps6586x->regmap, reg, &rval);
	165	if (!ret)
	166	*val = rval;
	167	return ret;
c6c19332 MR	168	}
	169	EXPORT_SYMBOL_GPL(tps6586x_read);
	170
	171	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
	172	{
1176b5be LD	173	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	174
	175	return regmap_bulk_read(tps6586x->regmap, reg, val, len);
c6c19332 MR	176	}
	177	EXPORT_SYMBOL_GPL(tps6586x_reads);
	178
	179	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	180	{
1176b5be	181	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	182
1176b5be	183	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
c6c19332 MR	184	}
	185	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	186
	187	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	188	{
1176b5be	189	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	190
1176b5be	191	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
c6c19332 MR	192	}
	193	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	194
	195	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	196	{
1176b5be	197	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	198
1176b5be	199	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
c6c19332 MR	200	}
	201	EXPORT_SYMBOL_GPL(tps6586x_update);
	202
605511a8 LD	203	int tps6586x_irq_get_virq(struct device *dev, int irq)
	204	{
	205	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	206
	207	return irq_create_mapping(tps6586x->irq_domain, irq);
	208	}
	209	EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
	210
c6c19332 MR	211	static int __remove_subdev(struct device dev, void unused)
	212	{
	213	platform_device_unregister(to_platform_device(dev));
	214	return 0;
	215	}
	216
	217	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	218	{
	219	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	220	}
	221
96e824bd	222	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	223	{
96e824bd	224	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	225
	226	mutex_lock(&tps6586x->irq_lock);
	227	}
	228
96e824bd	229	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	230	{
96e824bd	231	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
605511a8	232	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	233	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	234
	235	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	236	tps6586x->irq_en \|= (1 << __irq);
	237	}
	238
96e824bd	239	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	240	{
96e824bd	241	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	242
605511a8	243	unsigned int __irq = irq_data->hwirq;
c26448c4 GK	244	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	245
	246	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	247	tps6586x->irq_en &= ~(1 << __irq);
	248	}
	249
96e824bd	250	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	251	{
96e824bd	252	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	253	int i;
	254
	255	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
75edd5af LD	256	int ret;
	257	ret = tps6586x_write(tps6586x->dev,
	258	TPS6586X_INT_MASK1 + i,
	259	tps6586x->mask_reg[i]);
	260	WARN_ON(ret);
c26448c4 GK	261	}
	262
	263	mutex_unlock(&tps6586x->irq_lock);
	264	}
	265
234506ad SW	266	#ifdef CONFIG_PM_SLEEP
	267	static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
	268	{
	269	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
	270	return irq_set_irq_wake(tps6586x->irq, on);
	271	}
	272	#else
	273	#define tps6586x_irq_set_wake NULL
	274	#endif
	275
605511a8 LD	276	static struct irq_chip tps6586x_irq_chip = {
	277	.name = "tps6586x",
	278	.irq_bus_lock = tps6586x_irq_lock,
	279	.irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
	280	.irq_disable = tps6586x_irq_disable,
	281	.irq_enable = tps6586x_irq_enable,
234506ad	282	.irq_set_wake = tps6586x_irq_set_wake,
605511a8 LD	283	};
	284
	285	static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
	286	irq_hw_number_t hw)
	287	{
	288	struct tps6586x *tps6586x = h->host_data;
	289
	290	irq_set_chip_data(virq, tps6586x);
	291	irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
	292	irq_set_nested_thread(virq, 1);
	293
	294	/* ARM needs us to explicitly flag the IRQ as valid
	295	* and will set them noprobe when we do so. */
	296	#ifdef CONFIG_ARM
	297	set_irq_flags(virq, IRQF_VALID);
	298	#else
	299	irq_set_noprobe(virq);
	300	#endif
	301
	302	return 0;
	303	}
	304
	305	static struct irq_domain_ops tps6586x_domain_ops = {
	306	.map = tps6586x_irq_map,
	307	.xlate = irq_domain_xlate_twocell,
	308	};
	309
c26448c4 GK	310	static irqreturn_t tps6586x_irq(int irq, void *data)
	311	{
	312	struct tps6586x *tps6586x = data;
	313	u32 acks;
	314	int ret = 0;
	315
	316	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	317	sizeof(acks), (uint8_t *)&acks);
	318
	319	if (ret < 0) {
	320	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	321	return IRQ_NONE;
	322	}
	323
	324	acks = le32_to_cpu(acks);
	325
	326	while (acks) {
	327	int i = __ffs(acks);
	328
	329	if (tps6586x->irq_en & (1 << i))
605511a8 LD	330	handle_nested_irq(
605511a8 LD	331	irq_find_mapping(tps6586x->irq_domain, i));
c26448c4 GK	332
	333	acks &= ~(1 << i);
	334	}
	335
	336	return IRQ_HANDLED;
	337	}
	338
f791be49	339	static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
c26448c4 GK	340	int irq_base)
	341	{
	342	int i, ret;
	343	u8 tmp[4];
605511a8 LD	344	int new_irq_base;
605511a8 LD	345	int irq_num = ARRAY_SIZE(tps6586x_irqs);
c26448c4	346
234506ad SW	347	tps6586x->irq = irq;
234506ad SW	348
c26448c4 GK	349	mutex_init(&tps6586x->irq_lock);
c26448c4 GK	350	for (i = 0; i < 5; i++) {
c26448c4 GK	351	tps6586x->mask_reg[i] = 0xff;
	352	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	353	}
	354
	355	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	356
605511a8 LD	357	if (irq_base > 0) {
	358	new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
	359	if (new_irq_base < 0) {
	360	dev_err(tps6586x->dev,
	361	"Failed to alloc IRQs: %d\n", new_irq_base);
	362	return new_irq_base;
	363	}
	364	} else {
	365	new_irq_base = 0;
c26448c4 GK	366	}
c26448c4 GK	367
605511a8 LD	368	tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
	369	irq_num, new_irq_base, &tps6586x_domain_ops,
	370	tps6586x);
	371	if (!tps6586x->irq_domain) {
	372	dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
	373	return -ENOMEM;
	374	}
c26448c4 GK	375	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	376	"tps6586x", tps6586x);
	377
234506ad	378	if (!ret)
c26448c4	379	device_init_wakeup(tps6586x->dev, 1);
c26448c4 GK	380
	381	return ret;
	382	}
	383
f791be49	384	static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
c6c19332 MR	385	struct tps6586x_platform_data *pdata)
	386	{
	387	struct tps6586x_subdev_info *subdev;
	388	struct platform_device *pdev;
	389	int i, ret = 0;
	390
	391	for (i = 0; i < pdata->num_subdevs; i++) {
	392	subdev = &pdata->subdevs[i];
	393
	394	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	395	if (!pdev) {
	396	ret = -ENOMEM;
	397	goto failed;
	398	}
c6c19332 MR	399
	400	pdev->dev.parent = tps6586x->dev;
	401	pdev->dev.platform_data = subdev->platform_data;
62f6b087	402	pdev->dev.of_node = subdev->of_node;
c6c19332 MR	403
c6c19332 MR	404	ret = platform_device_add(pdev);
929980ab AL	405	if (ret) {
929980ab AL	406	platform_device_put(pdev);
c6c19332	407	goto failed;
929980ab	408	}
c6c19332 MR	409	}
	410	return 0;
	411
	412	failed:
	413	tps6586x_remove_subdevs(tps6586x);
	414	return ret;
	415	}
	416
62f6b087	417	#ifdef CONFIG_OF
62f6b087 TR	418	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
62f6b087 TR	419	{
62f6b087 TR	420	struct device_node *np = client->dev.of_node;
62f6b087 TR	421	struct tps6586x_platform_data *pdata;
62f6b087 TR	422
62f6b087 TR	423	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
64e48160 LD	424	if (!pdata) {
64e48160 LD	425	dev_err(&client->dev, "Memory allocation failed\n");
62f6b087	426	return NULL;
64e48160	427	}
62f6b087	428
64e48160 LD	429	pdata->num_subdevs = 0;
64e48160 LD	430	pdata->subdevs = NULL;
62f6b087 TR	431	pdata->gpio_base = -1;
62f6b087 TR	432	pdata->irq_base = -1;
004c15a6	433	pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
62f6b087 TR	434
	435	return pdata;
	436	}
	437
	438	static struct of_device_id tps6586x_of_match[] = {
	439	{ .compatible = "ti,tps6586x", },
	440	{ },
	441	};
	442	#else
	443	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	444	{
	445	return NULL;
	446	}
	447	#endif
	448
75edd5af LD	449	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	450	{
	451	/* Cache all interrupt mask register */
	452	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
	453	return false;
	454
	455	return true;
	456	}
	457
1176b5be LD	458	static const struct regmap_config tps6586x_regmap_config = {
	459	.reg_bits = 8,
	460	.val_bits = 8,
	461	.max_register = TPS6586X_MAX_REGISTER - 1,
75edd5af LD	462	.volatile_reg = is_volatile_reg,
75edd5af LD	463	.cache_type = REGCACHE_RBTREE,
1176b5be LD	464	};
1176b5be LD	465
004c15a6 BH	466	static struct device *tps6586x_dev;
	467	static void tps6586x_power_off(void)
	468	{
	469	if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
	470	return;
	471
	472	tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
	473	}
	474
f791be49	475	static int tps6586x_i2c_probe(struct i2c_client *client,
c6c19332 MR	476	const struct i2c_device_id *id)
c6c19332 MR	477	{
334a41ce	478	struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
c6c19332 MR	479	struct tps6586x *tps6586x;
	480	int ret;
	481
62f6b087 TR	482	if (!pdata && client->dev.of_node)
	483	pdata = tps6586x_parse_dt(client);
	484
c6c19332 MR	485	if (!pdata) {
	486	dev_err(&client->dev, "tps6586x requires platform data\n");
	487	return -ENOTSUPP;
	488	}
	489
	490	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	491	if (ret < 0) {
	492	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	493	return -EIO;
	494	}
	495
4d1cdbf6	496	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332	497
b6719412 LD	498	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	499	if (tps6586x == NULL) {
	500	dev_err(&client->dev, "memory for tps6586x alloc failed\n");
c6c19332	501	return -ENOMEM;
b6719412	502	}
c6c19332 MR	503
	504	tps6586x->client = client;
	505	tps6586x->dev = &client->dev;
	506	i2c_set_clientdata(client, tps6586x);
	507
1176b5be LD	508	tps6586x->regmap = devm_regmap_init_i2c(client,
	509	&tps6586x_regmap_config);
	510	if (IS_ERR(tps6586x->regmap)) {
	511	ret = PTR_ERR(tps6586x->regmap);
	512	dev_err(&client->dev, "regmap init failed: %d\n", ret);
	513	return ret;
	514	}
	515
c6c19332	516
c26448c4 GK	517	if (client->irq) {
	518	ret = tps6586x_irq_init(tps6586x, client->irq,
	519	pdata->irq_base);
	520	if (ret) {
	521	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
b6719412	522	return ret;
c26448c4 GK	523	}
	524	}
	525
7a7487cb	526	ret = mfd_add_devices(tps6586x->dev, -1,
0848c94f	527	tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
5b8b1fe2	528	NULL, 0, tps6586x->irq_domain);
7a7487cb LD	529	if (ret < 0) {
	530	dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
	531	goto err_mfd_add;
6f9f13bf VP	532	}
6f9f13bf VP	533
c6c19332 MR	534	ret = tps6586x_add_subdevs(tps6586x, pdata);
	535	if (ret) {
	536	dev_err(&client->dev, "add devices failed: %d\n", ret);
	537	goto err_add_devs;
	538	}
	539
004c15a6 BH	540	if (pdata->pm_off && !pm_power_off) {
	541	tps6586x_dev = &client->dev;
	542	pm_power_off = tps6586x_power_off;
	543	}
	544
c6c19332 MR	545	return 0;
	546
	547	err_add_devs:
7a7487cb LD	548	mfd_remove_devices(tps6586x->dev);
7a7487cb LD	549	err_mfd_add:
c26448c4 GK	550	if (client->irq)
c26448c4 GK	551	free_irq(client->irq, tps6586x);
c6c19332 MR	552	return ret;
	553	}
	554
4740f73f	555	static int tps6586x_i2c_remove(struct i2c_client *client)
c6c19332	556	{
4b751cf5	557	struct tps6586x *tps6586x = i2c_get_clientdata(client);
4b751cf5	558
7a7487cb LD	559	tps6586x_remove_subdevs(tps6586x);
7a7487cb LD	560	mfd_remove_devices(tps6586x->dev);
c26448c4 GK	561	if (client->irq)
c26448c4 GK	562	free_irq(client->irq, tps6586x);
c6c19332 MR	563	return 0;
	564	}
	565
	566	static const struct i2c_device_id tps6586x_id_table[] = {
	567	{ "tps6586x", 0 },
	568	{ },
	569	};
	570	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	571
	572	static struct i2c_driver tps6586x_driver = {
	573	.driver = {
	574	.name = "tps6586x",
	575	.owner = THIS_MODULE,
62f6b087	576	.of_match_table = of_match_ptr(tps6586x_of_match),
c6c19332 MR	577	},
c6c19332 MR	578	.probe = tps6586x_i2c_probe,
84449216	579	.remove = tps6586x_i2c_remove,
c6c19332 MR	580	.id_table = tps6586x_id_table,
	581	};
	582
	583	static int __init tps6586x_init(void)
	584	{
	585	return i2c_add_driver(&tps6586x_driver);
	586	}
	587	subsys_initcall(tps6586x_init);
	588
	589	static void __exit tps6586x_exit(void)
	590	{
	591	i2c_del_driver(&tps6586x_driver);
	592	}
	593	module_exit(tps6586x_exit);
	594
	595	MODULE_DESCRIPTION("TPS6586X core driver");
	596	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	597	MODULE_LICENSE("GPL");