drivers/mfd/tps65090.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * Core driver for TI TPS65090 PMIC family
  *
  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.

  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.

  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.

  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */

 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/tps65090.h>
 #include <linux/regmap.h>
 #include <linux/err.h>

 #define NUM_INT_REG 2
 #define TOTAL_NUM_REG 0x18

 /* interrupt status registers */
 #define TPS65090_INT_STS	0x0
 #define TPS65090_INT_STS2	0x1

 /* interrupt mask registers */
 #define TPS65090_INT_MSK	0x2
 #define TPS65090_INT_MSK2	0x3

 struct tps65090_irq_data {
 	u8		mask_reg;
 	u8		mask_pos;
 };

 #define TPS65090_IRQ(_reg, _mask_pos)		\
 	{					\
 		.mask_reg	= (_reg),	\
 		.mask_pos	= (_mask_pos),	\
 	}

 static const struct tps65090_irq_data tps65090_irqs[] = {
 	[0]		= TPS65090_IRQ(0, 0),
 	[1]		= TPS65090_IRQ(0, 1),
 	[2]		= TPS65090_IRQ(0, 2),
 	[3]		= TPS65090_IRQ(0, 3),
 	[4]		= TPS65090_IRQ(0, 4),
 	[5]		= TPS65090_IRQ(0, 5),
 	[6]		= TPS65090_IRQ(0, 6),
 	[7]		= TPS65090_IRQ(0, 7),
 	[8]		= TPS65090_IRQ(1, 0),
 	[9]		= TPS65090_IRQ(1, 1),
 	[10]		= TPS65090_IRQ(1, 2),
 	[11]		= TPS65090_IRQ(1, 3),
 	[12]		= TPS65090_IRQ(1, 4),
 	[13]		= TPS65090_IRQ(1, 5),
 	[14]		= TPS65090_IRQ(1, 6),
 	[15]		= TPS65090_IRQ(1, 7),
 };

 static struct mfd_cell tps65090s[] = {
 	{
 		.name = "tps65910-pmic",
 	},
 	{
 		.name = "tps65910-regulator",
 	},
 };

 struct tps65090 {
 	struct mutex		lock;
 	struct device		*dev;
 	struct i2c_client	*client;
 	struct regmap		*rmap;
 	struct irq_chip		irq_chip;
 	struct mutex		irq_lock;
 	int			irq_base;
 	unsigned int		id;
 };

 int tps65090_write(struct device *dev, int reg, uint8_t val)
 {
 	struct tps65090 *tps = dev_get_drvdata(dev);
 	return regmap_write(tps->rmap, reg, val);
 }
 EXPORT_SYMBOL_GPL(tps65090_write);

 int tps65090_read(struct device *dev, int reg, uint8_t *val)
 {
 	struct tps65090 *tps = dev_get_drvdata(dev);
 	unsigned int temp_val;
 	int ret;
 	ret = regmap_read(tps->rmap, reg, &temp_val);
 	if (!ret)
 		*val = temp_val;
 	return ret;
 }
 EXPORT_SYMBOL_GPL(tps65090_read);

 int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
 {
 	struct tps65090 *tps = dev_get_drvdata(dev);
 	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
 }
 EXPORT_SYMBOL_GPL(tps65090_set_bits);

 int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
 {
 	struct tps65090 *tps = dev_get_drvdata(dev);
 	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
 }
 EXPORT_SYMBOL_GPL(tps65090_clr_bits);

 static void tps65090_irq_lock(struct irq_data *data)
 {
 	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);

 	mutex_lock(&tps65090->irq_lock);
 }

 static void tps65090_irq_mask(struct irq_data *irq_data)
 {
 	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
 	unsigned int __irq = irq_data->hwirq;
 	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];

 	tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
 		data->mask_pos);
 }

 static void tps65090_irq_unmask(struct irq_data *irq_data)
 {
 	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
 	unsigned int __irq = irq_data->irq - tps65090->irq_base;
 	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];

 	tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
 		data->mask_pos);
 }

 static void tps65090_irq_sync_unlock(struct irq_data *data)
 {
 	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);

 	mutex_unlock(&tps65090->irq_lock);
 }

 static irqreturn_t tps65090_irq(int irq, void *data)
 {
 	struct tps65090 *tps65090 = data;
 	int ret = 0;
 	u8 status, mask;
 	unsigned long int acks = 0;
 	int i;

 	for (i = 0; i < NUM_INT_REG; i++) {
 		ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
 		if (ret < 0) {
 			dev_err(tps65090->dev,
 				"failed to read mask reg [addr:%d]\n",
 				TPS65090_INT_MSK + i);
 			return IRQ_NONE;
 		}
 		ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
 			&status);
 		if (ret < 0) {
 			dev_err(tps65090->dev,
 				"failed to read status reg [addr:%d]\n",
 				 TPS65090_INT_STS + i);
 			return IRQ_NONE;
 		}
 		if (status) {
 			/* Ack only those interrupts which are not masked */
 			status &= (~mask);
 			ret = tps65090_write(tps65090->dev,
 					TPS65090_INT_STS + i, status);
 			if (ret < 0) {
 				dev_err(tps65090->dev,
 					"failed to write interrupt status\n");
 				return IRQ_NONE;
 			}
 			acks |= (status << (i * 8));
 		}
 	}

 	for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
 		handle_nested_irq(tps65090->irq_base + i);
 	return acks ? IRQ_HANDLED : IRQ_NONE;
 }

 static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
 	int irq_base)
 {
 	int i, ret;

 	if (!irq_base) {
 		dev_err(tps65090->dev, "IRQ base not set\n");
 		return -EINVAL;
 	}

 	mutex_init(&tps65090->irq_lock);

 	for (i = 0; i < NUM_INT_REG; i++)
 		tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);

 	for (i = 0; i < NUM_INT_REG; i++)
 		tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);

 	tps65090->irq_base = irq_base;
 	tps65090->irq_chip.name = "tps65090";
 	tps65090->irq_chip.irq_mask = tps65090_irq_mask;
 	tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
 	tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
 	tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;

 	for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
 		int __irq = i + tps65090->irq_base;
 		irq_set_chip_data(__irq, tps65090);
 		irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
 					 handle_simple_irq);
 		irq_set_nested_thread(__irq, 1);
 #ifdef CONFIG_ARM
 		set_irq_flags(__irq, IRQF_VALID);
 #endif
 	}

 	ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
 				"tps65090", tps65090);
 	if (!ret) {
 		device_init_wakeup(tps65090->dev, 1);
 		enable_irq_wake(irq);
 	}

 	return ret;
 }

 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 {
 	if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS))
 		return true;
 	else
 		return false;
 }

 static const struct regmap_config tps65090_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = TOTAL_NUM_REG,
 	.num_reg_defaults_raw = TOTAL_NUM_REG,
 	.cache_type = REGCACHE_RBTREE,
 	.volatile_reg = is_volatile_reg,
 };

 static int __devinit tps65090_i2c_probe(struct i2c_client *client,
 					const struct i2c_device_id *id)
 {
 	struct tps65090_platform_data *pdata = client->dev.platform_data;
 	struct tps65090 *tps65090;
 	int ret;

 	if (!pdata) {
 		dev_err(&client->dev, "tps65090 requires platform data\n");
 		return -EINVAL;
 	}

 	tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
 		GFP_KERNEL);
 	if (tps65090 == NULL)
 		return -ENOMEM;

 	tps65090->client = client;
 	tps65090->dev = &client->dev;
 	i2c_set_clientdata(client, tps65090);

 	mutex_init(&tps65090->lock);

 	if (client->irq) {
 		ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
 		if (ret) {
 			dev_err(&client->dev, "IRQ init failed with err: %d\n",
 				ret);
 			goto err_exit;
 		}
 	}

 	tps65090->rmap = devm_regmap_init_i2c(tps65090->client,
 					      &tps65090_regmap_config);
 	if (IS_ERR(tps65090->rmap)) {
 		ret = PTR_ERR(tps65090->rmap);
 		dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
 		goto err_irq_exit;
 	}

 	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
 		ARRAY_SIZE(tps65090s), NULL, 0);
 	if (ret) {
 		dev_err(&client->dev, "add mfd devices failed with err: %d\n",
 			ret);
 		goto err_irq_exit;
 	}

 	return 0;

 err_irq_exit:
 	if (client->irq)
 		free_irq(client->irq, tps65090);
 err_exit:
 	return ret;
 }

 static int __devexit tps65090_i2c_remove(struct i2c_client *client)
 {
 	struct tps65090 *tps65090 = i2c_get_clientdata(client);

 	mfd_remove_devices(tps65090->dev);
 	if (client->irq)
 		free_irq(client->irq, tps65090);

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int tps65090_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	if (client->irq)
 		disable_irq(client->irq);
 	return 0;
 }

 static int tps65090_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	if (client->irq)
 		enable_irq(client->irq);
 	return 0;
 }
 #endif

 static const struct dev_pm_ops tps65090_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
 };

 static const struct i2c_device_id tps65090_id_table[] = {
 	{ "tps65090", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);

 static struct i2c_driver tps65090_driver = {
 	.driver	= {
 		.name	= "tps65090",
 		.owner	= THIS_MODULE,
 		.pm	= &tps65090_pm_ops,
 	},
 	.probe		= tps65090_i2c_probe,
 	.remove		= __devexit_p(tps65090_i2c_remove),
 	.id_table	= tps65090_id_table,
 };

 static int __init tps65090_init(void)
 {
 	return i2c_add_driver(&tps65090_driver);
 }
 subsys_initcall(tps65090_init);

 static void __exit tps65090_exit(void)
 {
 	i2c_del_driver(&tps65090_driver);
 }
 module_exit(tps65090_exit);

 MODULE_DESCRIPTION("TPS65090 core driver");
 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
 MODULE_LICENSE("GPL v2");
	/*
	* Core driver for TI TPS65090 PMIC family
	*
	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.

	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.

	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.

	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include <linux/interrupt.h>
	#include <linux/irq.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/mutex.h>
	#include <linux/slab.h>
	#include <linux/i2c.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/tps65090.h>
	#include <linux/regmap.h>
	#include <linux/err.h>

	#define NUM_INT_REG 2
	#define TOTAL_NUM_REG 0x18

	/* interrupt status registers */
	#define TPS65090_INT_STS 0x0
	#define TPS65090_INT_STS2 0x1

	/* interrupt mask registers */
	#define TPS65090_INT_MSK 0x2
	#define TPS65090_INT_MSK2 0x3

	struct tps65090_irq_data {
	u8 mask_reg;
	u8 mask_pos;
	};

	#define TPS65090_IRQ(_reg, _mask_pos) \
	{ \
	.mask_reg = (_reg), \
	.mask_pos = (_mask_pos), \
	}

	static const struct tps65090_irq_data tps65090_irqs[] = {
	[0] = TPS65090_IRQ(0, 0),
	[1] = TPS65090_IRQ(0, 1),
	[2] = TPS65090_IRQ(0, 2),
	[3] = TPS65090_IRQ(0, 3),
	[4] = TPS65090_IRQ(0, 4),
	[5] = TPS65090_IRQ(0, 5),
	[6] = TPS65090_IRQ(0, 6),
	[7] = TPS65090_IRQ(0, 7),
	[8] = TPS65090_IRQ(1, 0),
	[9] = TPS65090_IRQ(1, 1),
	[10] = TPS65090_IRQ(1, 2),
	[11] = TPS65090_IRQ(1, 3),
	[12] = TPS65090_IRQ(1, 4),
	[13] = TPS65090_IRQ(1, 5),
	[14] = TPS65090_IRQ(1, 6),
	[15] = TPS65090_IRQ(1, 7),
	};

	static struct mfd_cell tps65090s[] = {
	{
	.name = "tps65910-pmic",
	},
	{
	.name = "tps65910-regulator",
	},
	};

	struct tps65090 {
	struct mutex lock;
	struct device *dev;
	struct i2c_client *client;
	struct regmap *rmap;
	struct irq_chip irq_chip;
	struct mutex irq_lock;
	int irq_base;
	unsigned int id;
	};

	int tps65090_write(struct device *dev, int reg, uint8_t val)
	{
	struct tps65090 *tps = dev_get_drvdata(dev);
	return regmap_write(tps->rmap, reg, val);
	}
	EXPORT_SYMBOL_GPL(tps65090_write);

	int tps65090_read(struct device dev, int reg, uint8_t val)
	{
	struct tps65090 *tps = dev_get_drvdata(dev);
	unsigned int temp_val;
	int ret;
	ret = regmap_read(tps->rmap, reg, &temp_val);
	if (!ret)
	*val = temp_val;
	return ret;
	}
	EXPORT_SYMBOL_GPL(tps65090_read);

	int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
	{
	struct tps65090 *tps = dev_get_drvdata(dev);
	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
	}
	EXPORT_SYMBOL_GPL(tps65090_set_bits);

	int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
	{
	struct tps65090 *tps = dev_get_drvdata(dev);
	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
	}
	EXPORT_SYMBOL_GPL(tps65090_clr_bits);

	static void tps65090_irq_lock(struct irq_data *data)
	{
	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);

	mutex_lock(&tps65090->irq_lock);
	}

	static void tps65090_irq_mask(struct irq_data *irq_data)
	{
	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->hwirq;
	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];

	tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
	data->mask_pos);
	}

	static void tps65090_irq_unmask(struct irq_data *irq_data)
	{
	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
	unsigned int __irq = irq_data->irq - tps65090->irq_base;
	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];

	tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
	data->mask_pos);
	}

	static void tps65090_irq_sync_unlock(struct irq_data *data)
	{
	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);

	mutex_unlock(&tps65090->irq_lock);
	}

	static irqreturn_t tps65090_irq(int irq, void *data)
	{
	struct tps65090 *tps65090 = data;
	int ret = 0;
	u8 status, mask;
	unsigned long int acks = 0;
	int i;

	for (i = 0; i < NUM_INT_REG; i++) {
	ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
	if (ret < 0) {
	dev_err(tps65090->dev,
	"failed to read mask reg [addr:%d]\n",
	TPS65090_INT_MSK + i);
	return IRQ_NONE;
	}
	ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
	&status);
	if (ret < 0) {
	dev_err(tps65090->dev,
	"failed to read status reg [addr:%d]\n",
	TPS65090_INT_STS + i);
	return IRQ_NONE;
	}
	if (status) {
	/* Ack only those interrupts which are not masked */
	status &= (~mask);
	ret = tps65090_write(tps65090->dev,
	TPS65090_INT_STS + i, status);
	if (ret < 0) {
	dev_err(tps65090->dev,
	"failed to write interrupt status\n");
	return IRQ_NONE;
	}
	acks \|= (status << (i * 8));
	}
	}

	for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
	handle_nested_irq(tps65090->irq_base + i);
	return acks ? IRQ_HANDLED : IRQ_NONE;
	}

	static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
	int irq_base)
	{
	int i, ret;

	if (!irq_base) {
	dev_err(tps65090->dev, "IRQ base not set\n");
	return -EINVAL;
	}

	mutex_init(&tps65090->irq_lock);

	for (i = 0; i < NUM_INT_REG; i++)
	tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);

	for (i = 0; i < NUM_INT_REG; i++)
	tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);

	tps65090->irq_base = irq_base;
	tps65090->irq_chip.name = "tps65090";
	tps65090->irq_chip.irq_mask = tps65090_irq_mask;
	tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
	tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
	tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;

	for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
	int __irq = i + tps65090->irq_base;
	irq_set_chip_data(__irq, tps65090);
	irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
	handle_simple_irq);
	irq_set_nested_thread(__irq, 1);
	#ifdef CONFIG_ARM
	set_irq_flags(__irq, IRQF_VALID);
	#endif
	}

	ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
	"tps65090", tps65090);
	if (!ret) {
	device_init_wakeup(tps65090->dev, 1);
	enable_irq_wake(irq);
	}

	return ret;
	}

	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	{
	if ((reg == TPS65090_INT_STS) \|\| (reg == TPS65090_INT_STS))
	return true;
	else
	return false;
	}

	static const struct regmap_config tps65090_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TOTAL_NUM_REG,
	.num_reg_defaults_raw = TOTAL_NUM_REG,
	.cache_type = REGCACHE_RBTREE,
	.volatile_reg = is_volatile_reg,
	};

	static int __devinit tps65090_i2c_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct tps65090_platform_data *pdata = client->dev.platform_data;
	struct tps65090 *tps65090;
	int ret;

	if (!pdata) {
	dev_err(&client->dev, "tps65090 requires platform data\n");
	return -EINVAL;
	}

	tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
	GFP_KERNEL);
	if (tps65090 == NULL)
	return -ENOMEM;

	tps65090->client = client;
	tps65090->dev = &client->dev;
	i2c_set_clientdata(client, tps65090);

	mutex_init(&tps65090->lock);

	if (client->irq) {
	ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
	if (ret) {
	dev_err(&client->dev, "IRQ init failed with err: %d\n",
	ret);
	goto err_exit;
	}
	}

	tps65090->rmap = devm_regmap_init_i2c(tps65090->client,
	&tps65090_regmap_config);
	if (IS_ERR(tps65090->rmap)) {
	ret = PTR_ERR(tps65090->rmap);
	dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
	goto err_irq_exit;
	}

	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
	ARRAY_SIZE(tps65090s), NULL, 0);
	if (ret) {
	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	ret);
	goto err_irq_exit;
	}

	return 0;

	err_irq_exit:
	if (client->irq)
	free_irq(client->irq, tps65090);
	err_exit:
	return ret;
	}

	static int __devexit tps65090_i2c_remove(struct i2c_client *client)
	{
	struct tps65090 *tps65090 = i2c_get_clientdata(client);

	mfd_remove_devices(tps65090->dev);
	if (client->irq)
	free_irq(client->irq, tps65090);

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int tps65090_suspend(struct device *dev)
	{
	struct i2c_client *client = to_i2c_client(dev);
	if (client->irq)
	disable_irq(client->irq);
	return 0;
	}

	static int tps65090_resume(struct device *dev)
	{
	struct i2c_client *client = to_i2c_client(dev);
	if (client->irq)
	enable_irq(client->irq);
	return 0;
	}
	#endif

	static const struct dev_pm_ops tps65090_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
	};

	static const struct i2c_device_id tps65090_id_table[] = {
	{ "tps65090", 0 },
	{ },
	};
	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);

	static struct i2c_driver tps65090_driver = {
	.driver = {
	.name = "tps65090",
	.owner = THIS_MODULE,
	.pm = &tps65090_pm_ops,
	},
	.probe = tps65090_i2c_probe,
	.remove = __devexit_p(tps65090_i2c_remove),
	.id_table = tps65090_id_table,
	};

	static int __init tps65090_init(void)
	{
	return i2c_add_driver(&tps65090_driver);
	}
	subsys_initcall(tps65090_init);

	static void __exit tps65090_exit(void)
	{
	i2c_del_driver(&tps65090_driver);
	}
	module_exit(tps65090_exit);

	MODULE_DESCRIPTION("TPS65090 core driver");
	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	MODULE_LICENSE("GPL v2");