[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/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/i2c.h>

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

/* GPIO control registers */
#define TPS6586X_GPIOSET1	0x5d
#define TPS6586X_GPIOSET2	0x5e

/* 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

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),
};

struct tps6586x {
	struct mutex		lock;
	struct device		*dev;
	struct i2c_client	*client;

	struct gpio_chip	gpio;
	struct irq_chip		irq_chip;
	struct mutex		irq_lock;
	int			irq_base;
	u32			irq_en;
	u8			mask_cache[5];
	u8			mask_reg[5];
};

static inline int __tps6586x_read(struct i2c_client *client,
				  int reg, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_read_byte_data(client, reg);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
		return ret;
	}

	*val = (uint8_t)ret;

	return 0;
}

static inline int __tps6586x_reads(struct i2c_client *client, int reg,
				   int len, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
		return ret;
	}

	return 0;
}

static inline int __tps6586x_write(struct i2c_client *client,
				 int reg, uint8_t val)
{
	int ret;

	ret = i2c_smbus_write_byte_data(client, reg, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
				val, reg);
		return ret;
	}

	return 0;
}

static inline int __tps6586x_writes(struct i2c_client *client, int reg,
				  int len, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
		return ret;
	}

	return 0;
}

int tps6586x_write(struct device *dev, int reg, uint8_t val)
{
	return __tps6586x_write(to_i2c_client(dev), reg, val);
}
EXPORT_SYMBOL_GPL(tps6586x_write);

int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
{
	return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
}
EXPORT_SYMBOL_GPL(tps6586x_writes);

int tps6586x_read(struct device *dev, int reg, uint8_t *val)
{
	return __tps6586x_read(to_i2c_client(dev), reg, val);
}
EXPORT_SYMBOL_GPL(tps6586x_read);

int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
{
	return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
}
EXPORT_SYMBOL_GPL(tps6586x_reads);

int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&tps6586x->lock);

	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
	if (ret)
		goto out;

	if ((reg_val & bit_mask) == 0) {
		reg_val |= bit_mask;
		ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
	}
out:
	mutex_unlock(&tps6586x->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_set_bits);

int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&tps6586x->lock);

	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
	if (ret)
		goto out;

	if (reg_val & bit_mask) {
		reg_val &= ~bit_mask;
		ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
	}
out:
	mutex_unlock(&tps6586x->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_clr_bits);

int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
{
	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&tps6586x->lock);

	ret = __tps6586x_read(tps6586x->client, reg, &reg_val);
	if (ret)
		goto out;

	if ((reg_val & mask) != val) {
		reg_val = (reg_val & ~mask) | val;
		ret = __tps6586x_write(tps6586x->client, reg, reg_val);
	}
out:
	mutex_unlock(&tps6586x->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(tps6586x_update);

static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
	uint8_t val;
	int ret;

	ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
	if (ret)
		return ret;

	return !!(val & (1 << offset));
}


static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
			      int value)
{
	struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);

	__tps6586x_write(tps6586x->client, TPS6586X_GPIOSET2,
			 value << offset);
}

static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
	uint8_t val, mask;

	tps6586x_gpio_set(gc, offset, value);

	val = 0x1 << (offset * 2);
	mask = 0x3 << (offset * 2);

	return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
}

static void tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
{
	int ret;

	if (!gpio_base)
		return;

	tps6586x->gpio.owner		= THIS_MODULE;
	tps6586x->gpio.label		= tps6586x->client->name;
	tps6586x->gpio.dev		= tps6586x->dev;
	tps6586x->gpio.base		= gpio_base;
	tps6586x->gpio.ngpio		= 4;
	tps6586x->gpio.can_sleep	= 1;

	/* FIXME: add handling of GPIOs as dedicated inputs */
	tps6586x->gpio.direction_output	= tps6586x_gpio_output;
	tps6586x->gpio.set		= tps6586x_gpio_set;
	tps6586x->gpio.get		= tps6586x_gpio_get;

	ret = gpiochip_add(&tps6586x->gpio);
	if (ret)
		dev_warn(tps6586x->dev, "GPIO registration failed: %d\n", ret);
}

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->irq - tps6586x->irq_base;
	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->irq - tps6586x->irq_base;
	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++) {
		if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
			if (!WARN_ON(tps6586x_write(tps6586x->dev,
						    TPS6586X_INT_MASK1 + i,
						    tps6586x->mask_reg[i])))
				tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
		}
	}

	mutex_unlock(&tps6586x->irq_lock);
}

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(tps6586x->irq_base + i);

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

	return IRQ_HANDLED;
}

static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
				       int irq_base)
{
	int i, ret;
	u8 tmp[4];

	if (!irq_base) {
		dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
		return -EINVAL;
	}

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

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

	tps6586x->irq_base = irq_base;

	tps6586x->irq_chip.name = "tps6586x";
	tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
	tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
	tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
	tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;

	for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
		int __irq = i + tps6586x->irq_base;
		set_irq_chip_data(__irq, tps6586x);
		set_irq_chip_and_handler(__irq, &tps6586x->irq_chip,
					 handle_simple_irq);
		set_irq_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
		set_irq_flags(__irq, IRQF_VALID);
#endif
	}

	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
				   "tps6586x", tps6586x);

	if (!ret) {
		device_init_wakeup(tps6586x->dev, 1);
		enable_irq_wake(irq);
	}

	return ret;
}

static int __devinit 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;

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

failed:
	tps6586x_remove_subdevs(tps6586x);
	return ret;
}

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

	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 = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
	if (tps6586x == NULL)
		return -ENOMEM;

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

	mutex_init(&tps6586x->lock);

	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);
			goto err_irq_init;
		}
	}

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

	tps6586x_gpio_init(tps6586x, pdata->gpio_base);

	return 0;

err_add_devs:
	if (client->irq)
		free_irq(client->irq, tps6586x);
err_irq_init:
	kfree(tps6586x);
	return ret;
}

static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
{
	struct tps6586x *tps6586x = i2c_get_clientdata(client);
	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	int ret;

	if (client->irq)
		free_irq(client->irq, tps6586x);

	if (pdata->gpio_base) {
		ret = gpiochip_remove(&tps6586x->gpio);
		if (ret)
			dev_err(&client->dev, "Can't remove gpio chip: %d\n",
				ret);
	}

	tps6586x_remove_subdevs(tps6586x);
	kfree(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,
	},
	.probe		= tps6586x_i2c_probe,
	.remove		= __devexit_p(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>
c6c19332 MR	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/mutex.h>
	23	#include <linux/slab.h>
	24	#include <linux/gpio.h>
	25	#include <linux/i2c.h>
	26
	27	#include <linux/mfd/core.h>
	28	#include <linux/mfd/tps6586x.h>
	29
	30	/* GPIO control registers */
	31	#define TPS6586X_GPIOSET1 0x5d
	32	#define TPS6586X_GPIOSET2 0x5e
	33
c26448c4 GK	34	/* interrupt control registers */
	35	#define TPS6586X_INT_ACK1 0xb5
	36	#define TPS6586X_INT_ACK2 0xb6
	37	#define TPS6586X_INT_ACK3 0xb7
	38	#define TPS6586X_INT_ACK4 0xb8
	39
	40	/* interrupt mask registers */
	41	#define TPS6586X_INT_MASK1 0xb0
	42	#define TPS6586X_INT_MASK2 0xb1
	43	#define TPS6586X_INT_MASK3 0xb2
	44	#define TPS6586X_INT_MASK4 0xb3
	45	#define TPS6586X_INT_MASK5 0xb4
	46
c6c19332 MR	47	/* device id */
c6c19332 MR	48	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	49
c26448c4 GK	50	struct tps6586x_irq_data {
	51	u8 mask_reg;
	52	u8 mask_mask;
	53	};
	54
	55	#define TPS6586X_IRQ(_reg, _mask) \
	56	{ \
	57	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	58	.mask_mask = (_mask), \
	59	}
	60
	61	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	62	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	63	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	64	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	65	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	66	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	67	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	68	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	69	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	70	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	71	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	72	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	73	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	74	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	75	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	76	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	77	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	78	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	79	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	80	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	81	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	82	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	83	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	84	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	85	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	86	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	87	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	88	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	89	};
	90
c6c19332 MR	91	struct tps6586x {
	92	struct mutex lock;
	93	struct device *dev;
	94	struct i2c_client *client;
	95
	96	struct gpio_chip gpio;
c26448c4 GK	97	struct irq_chip irq_chip;
	98	struct mutex irq_lock;
	99	int irq_base;
	100	u32 irq_en;
	101	u8 mask_cache[5];
	102	u8 mask_reg[5];
c6c19332 MR	103	};
	104
	105	static inline int __tps6586x_read(struct i2c_client *client,
	106	int reg, uint8_t *val)
	107	{
	108	int ret;
	109
	110	ret = i2c_smbus_read_byte_data(client, reg);
	111	if (ret < 0) {
	112	dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
	113	return ret;
	114	}
	115
	116	*val = (uint8_t)ret;
	117
	118	return 0;
	119	}
	120
	121	static inline int __tps6586x_reads(struct i2c_client *client, int reg,
	122	int len, uint8_t *val)
	123	{
	124	int ret;
	125
	126	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
	127	if (ret < 0) {
	128	dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
	129	return ret;
	130	}
	131
	132	return 0;
	133	}
	134
	135	static inline int __tps6586x_write(struct i2c_client *client,
	136	int reg, uint8_t val)
	137	{
	138	int ret;
	139
	140	ret = i2c_smbus_write_byte_data(client, reg, val);
	141	if (ret < 0) {
	142	dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
	143	val, reg);
	144	return ret;
	145	}
	146
	147	return 0;
	148	}
	149
	150	static inline int __tps6586x_writes(struct i2c_client *client, int reg,
	151	int len, uint8_t *val)
	152	{
	153	int ret;
	154
	155	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
	156	if (ret < 0) {
	157	dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
	158	return ret;
	159	}
	160
	161	return 0;
	162	}
	163
	164	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	165	{
	166	return __tps6586x_write(to_i2c_client(dev), reg, val);
167	}
168	EXPORT_SYMBOL_GPL(tps6586x_write);
169
170	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
171	{
172	return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
173	}
174	EXPORT_SYMBOL_GPL(tps6586x_writes);
175
176	int tps6586x_read(struct device dev, int reg, uint8_t val)
177	{
178	return __tps6586x_read(to_i2c_client(dev), reg, val);
179	}
180	EXPORT_SYMBOL_GPL(tps6586x_read);
181
182	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
183	{
184	return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
185	}
186	EXPORT_SYMBOL_GPL(tps6586x_reads);
187
188	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
189	{
190	struct tps6586x *tps6586x = dev_get_drvdata(dev);
191	uint8_t reg_val;
192	int ret = 0;
193
194	mutex_lock(&tps6586x->lock);
195
196	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
197	if (ret)
198	goto out;
199
200	if ((reg_val & bit_mask) == 0) {
201	reg_val \|= bit_mask;
202	ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
203	}
204	out:
205	mutex_unlock(&tps6586x->lock);
206	return ret;
207	}
208	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
209
210	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
211	{
212	struct tps6586x *tps6586x = dev_get_drvdata(dev);
213	uint8_t reg_val;
214	int ret = 0;
215
216	mutex_lock(&tps6586x->lock);
217
218	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
219	if (ret)
220	goto out;
221
222	if (reg_val & bit_mask) {
223	reg_val &= ~bit_mask;
224	ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
225	}
226	out:
227	mutex_unlock(&tps6586x->lock);
228	return ret;
229	}
230	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
231
232	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
233	{
234	struct tps6586x *tps6586x = dev_get_drvdata(dev);
235	uint8_t reg_val;
236	int ret = 0;
237
238	mutex_lock(&tps6586x->lock);
239
240	ret = __tps6586x_read(tps6586x->client, reg, &reg_val);
241	if (ret)
242	goto out;
243
244	if ((reg_val & mask) != val) {
245	reg_val = (reg_val & ~mask) \| val;
246	ret = __tps6586x_write(tps6586x->client, reg, reg_val);
247	}
248	out:
249	mutex_unlock(&tps6586x->lock);
250	return ret;
251	}
252	EXPORT_SYMBOL_GPL(tps6586x_update);
253
254	static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
255	{
256	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
257	uint8_t val;
258	int ret;
259
260	ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
261	if (ret)
262	return ret;
263
264	return !!(val & (1 << offset));
265	}
266
267
268	static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
269	int value)
270	{
271	struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);
272
273	__tps6586x_write(tps6586x->client, TPS6586X_GPIOSET2,
274	value << offset);
275	}
276
277	static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
278	int value)
279	{
280	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
281	uint8_t val, mask;
282
283	tps6586x_gpio_set(gc, offset, value);
284
285	val = 0x1 << (offset * 2);
286	mask = 0x3 << (offset * 2);
287
288	return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
289	}
290
291	static void tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
292	{
293	int ret;
294
295	if (!gpio_base)
296	return;
297
298	tps6586x->gpio.owner = THIS_MODULE;
299	tps6586x->gpio.label = tps6586x->client->name;
300	tps6586x->gpio.dev = tps6586x->dev;
301	tps6586x->gpio.base = gpio_base;
302	tps6586x->gpio.ngpio = 4;
303	tps6586x->gpio.can_sleep = 1;
304
305	/* FIXME: add handling of GPIOs as dedicated inputs */
306	tps6586x->gpio.direction_output = tps6586x_gpio_output;
307	tps6586x->gpio.set = tps6586x_gpio_set;
308	tps6586x->gpio.get = tps6586x_gpio_get;
309
310	ret = gpiochip_add(&tps6586x->gpio);
311	if (ret)
312	dev_warn(tps6586x->dev, "GPIO registration failed: %d\n", ret);
313	}
314
315	static int __remove_subdev(struct device dev, void unused)
316	{
317	platform_device_unregister(to_platform_device(dev));
318	return 0;
319	}
320
321	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
322	{
323	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
324	}
325
96e824bd	326	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	327	{
96e824bd	328	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	329
	330	mutex_lock(&tps6586x->irq_lock);
	331	}
	332
96e824bd	333	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	334	{
96e824bd MB	335	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
96e824bd MB	336	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	337	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	338
	339	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	340	tps6586x->irq_en \|= (1 << __irq);
	341	}
	342
96e824bd	343	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	344	{
96e824bd	345	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	346
96e824bd	347	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	348	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	349
	350	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	351	tps6586x->irq_en &= ~(1 << __irq);
	352	}
	353
96e824bd	354	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	355	{
96e824bd	356	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	357	int i;
	358
	359	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
	360	if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
	361	if (!WARN_ON(tps6586x_write(tps6586x->dev,
	362	TPS6586X_INT_MASK1 + i,
	363	tps6586x->mask_reg[i])))
	364	tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
	365	}
	366	}
	367
	368	mutex_unlock(&tps6586x->irq_lock);
	369	}
	370
	371	static irqreturn_t tps6586x_irq(int irq, void *data)
	372	{
	373	struct tps6586x *tps6586x = data;
	374	u32 acks;
	375	int ret = 0;
	376
	377	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	378	sizeof(acks), (uint8_t *)&acks);
	379
	380	if (ret < 0) {
	381	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	382	return IRQ_NONE;
	383	}
	384
	385	acks = le32_to_cpu(acks);
	386
	387	while (acks) {
	388	int i = __ffs(acks);
	389
	390	if (tps6586x->irq_en & (1 << i))
	391	handle_nested_irq(tps6586x->irq_base + i);
	392
	393	acks &= ~(1 << i);
	394	}
	395
	396	return IRQ_HANDLED;
	397	}
	398
	399	static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
	400	int irq_base)
	401	{
	402	int i, ret;
	403	u8 tmp[4];
	404
	405	if (!irq_base) {
	406	dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
	407	return -EINVAL;
	408	}
	409
	410	mutex_init(&tps6586x->irq_lock);
	411	for (i = 0; i < 5; i++) {
	412	tps6586x->mask_cache[i] = 0xff;
	413	tps6586x->mask_reg[i] = 0xff;
	414	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	415	}
	416
	417	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	418
	419	tps6586x->irq_base = irq_base;
	420
421	tps6586x->irq_chip.name = "tps6586x";
96e824bd MB	422	tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
	423	tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
	424	tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
	425	tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
c26448c4 GK	426
	427	for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
	428	int __irq = i + tps6586x->irq_base;
	429	set_irq_chip_data(__irq, tps6586x);
	430	set_irq_chip_and_handler(__irq, &tps6586x->irq_chip,
	431	handle_simple_irq);
	432	set_irq_nested_thread(__irq, 1);
	433	#ifdef CONFIG_ARM
	434	set_irq_flags(__irq, IRQF_VALID);
	435	#endif
	436	}
	437
	438	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	439	"tps6586x", tps6586x);
	440
	441	if (!ret) {
	442	device_init_wakeup(tps6586x->dev, 1);
	443	enable_irq_wake(irq);
	444	}
	445
	446	return ret;
	447	}
	448
c6c19332 MR	449	static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
	450	struct tps6586x_platform_data *pdata)
	451	{
	452	struct tps6586x_subdev_info *subdev;
	453	struct platform_device *pdev;
	454	int i, ret = 0;
	455
	456	for (i = 0; i < pdata->num_subdevs; i++) {
	457	subdev = &pdata->subdevs[i];
	458
	459	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	460	if (!pdev) {
	461	ret = -ENOMEM;
	462	goto failed;
	463	}
c6c19332 MR	464
	465	pdev->dev.parent = tps6586x->dev;
	466	pdev->dev.platform_data = subdev->platform_data;
	467
	468	ret = platform_device_add(pdev);
929980ab AL	469	if (ret) {
929980ab AL	470	platform_device_put(pdev);
c6c19332	471	goto failed;
929980ab	472	}
c6c19332 MR	473	}
	474	return 0;
	475
	476	failed:
	477	tps6586x_remove_subdevs(tps6586x);
	478	return ret;
	479	}
	480
	481	static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
	482	const struct i2c_device_id *id)
	483	{
	484	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	485	struct tps6586x *tps6586x;
	486	int ret;
	487
	488	if (!pdata) {
	489	dev_err(&client->dev, "tps6586x requires platform data\n");
	490	return -ENOTSUPP;
	491	}
	492
	493	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	494	if (ret < 0) {
	495	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	496	return -EIO;
	497	}
	498
4d1cdbf6	499	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332 MR	500
	501	tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
	502	if (tps6586x == NULL)
	503	return -ENOMEM;
	504
	505	tps6586x->client = client;
	506	tps6586x->dev = &client->dev;
	507	i2c_set_clientdata(client, tps6586x);
	508
	509	mutex_init(&tps6586x->lock);
	510
c26448c4 GK	511	if (client->irq) {
	512	ret = tps6586x_irq_init(tps6586x, client->irq,
	513	pdata->irq_base);
	514	if (ret) {
	515	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
	516	goto err_irq_init;
	517	}
	518	}
	519
c6c19332 MR	520	ret = tps6586x_add_subdevs(tps6586x, pdata);
	521	if (ret) {
	522	dev_err(&client->dev, "add devices failed: %d\n", ret);
	523	goto err_add_devs;
	524	}
	525
	526	tps6586x_gpio_init(tps6586x, pdata->gpio_base);
	527
	528	return 0;
	529
	530	err_add_devs:
c26448c4 GK	531	if (client->irq)
	532	free_irq(client->irq, tps6586x);
	533	err_irq_init:
c6c19332 MR	534	kfree(tps6586x);
	535	return ret;
	536	}
	537
	538	static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
	539	{
4b751cf5 AL	540	struct tps6586x *tps6586x = i2c_get_clientdata(client);
	541	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	542	int ret;
	543
c26448c4 GK	544	if (client->irq)
	545	free_irq(client->irq, tps6586x);
	546
4b751cf5 AL	547	if (pdata->gpio_base) {
	548	ret = gpiochip_remove(&tps6586x->gpio);
	549	if (ret)
	550	dev_err(&client->dev, "Can't remove gpio chip: %d\n",
	551	ret);
	552	}
	553
	554	tps6586x_remove_subdevs(tps6586x);
	555	kfree(tps6586x);
c6c19332 MR	556	return 0;
	557	}
	558
	559	static const struct i2c_device_id tps6586x_id_table[] = {
	560	{ "tps6586x", 0 },
	561	{ },
	562	};
	563	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	564
	565	static struct i2c_driver tps6586x_driver = {
	566	.driver = {
	567	.name = "tps6586x",
	568	.owner = THIS_MODULE,
	569	},
	570	.probe = tps6586x_i2c_probe,
	571	.remove = __devexit_p(tps6586x_i2c_remove),
	572	.id_table = tps6586x_id_table,
	573	};
	574
	575	static int __init tps6586x_init(void)
	576	{
	577	return i2c_add_driver(&tps6586x_driver);
	578	}
	579	subsys_initcall(tps6586x_init);
	580
	581	static void __exit tps6586x_exit(void)
	582	{
	583	i2c_del_driver(&tps6586x_driver);
	584	}
	585	module_exit(tps6586x_exit);
	586
	587	MODULE_DESCRIPTION("TPS6586X core driver");
	588	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	589	MODULE_LICENSE("GPL");
	590