[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/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>

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

/* 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 mfd_cell tps6586x_cell[] = {
	{
		.name = "tps6586x-gpio",
	},
	{
		.name = "tps6586x-rtc",
	},
	{
		.name = "tps6586x-onkey",
	},
};

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

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

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);

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

	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_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;
		irq_set_chip_data(__irq, tps6586x);
		irq_set_chip_and_handler(__irq, &tps6586x->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, 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;
		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 of_regulator_match tps6586x_matches[] = {
	{ .name = "sm0",     .driver_data = (void *)TPS6586X_ID_SM_0    },
	{ .name = "sm1",     .driver_data = (void *)TPS6586X_ID_SM_1    },
	{ .name = "sm2",     .driver_data = (void *)TPS6586X_ID_SM_2    },
	{ .name = "ldo0",    .driver_data = (void *)TPS6586X_ID_LDO_0   },
	{ .name = "ldo1",    .driver_data = (void *)TPS6586X_ID_LDO_1   },
	{ .name = "ldo2",    .driver_data = (void *)TPS6586X_ID_LDO_2   },
	{ .name = "ldo3",    .driver_data = (void *)TPS6586X_ID_LDO_3   },
	{ .name = "ldo4",    .driver_data = (void *)TPS6586X_ID_LDO_4   },
	{ .name = "ldo5",    .driver_data = (void *)TPS6586X_ID_LDO_5   },
	{ .name = "ldo6",    .driver_data = (void *)TPS6586X_ID_LDO_6   },
	{ .name = "ldo7",    .driver_data = (void *)TPS6586X_ID_LDO_7   },
	{ .name = "ldo8",    .driver_data = (void *)TPS6586X_ID_LDO_8   },
	{ .name = "ldo9",    .driver_data = (void *)TPS6586X_ID_LDO_9   },
	{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
};

static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
{
	const unsigned int num = ARRAY_SIZE(tps6586x_matches);
	struct device_node *np = client->dev.of_node;
	struct tps6586x_platform_data *pdata;
	struct tps6586x_subdev_info *devs;
	struct device_node *regs;
	unsigned int count;
	unsigned int i, j;
	int err;

	regs = of_find_node_by_name(np, "regulators");
	if (!regs)
		return NULL;

	err = of_regulator_match(&client->dev, regs, tps6586x_matches, num);
	if (err < 0) {
		of_node_put(regs);
		return NULL;
	}

	of_node_put(regs);
	count = err;

	devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL);
	if (!devs)
		return NULL;

	for (i = 0, j = 0; i < num && j < count; i++) {
		if (!tps6586x_matches[i].init_data)
			continue;

		devs[j].name = "tps6586x-regulator";
		devs[j].platform_data = tps6586x_matches[i].init_data;
		devs[j].id = (int)tps6586x_matches[i].driver_data;
		devs[j].of_node = tps6586x_matches[i].of_node;
		j++;
	}

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

	pdata->num_subdevs = count;
	pdata->subdevs = devs;
	pdata->gpio_base = -1;
	pdata->irq_base = -1;

	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 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 && 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);
	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;
	}

	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 __devexit 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		= __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>
1176b5be	24	#include <linux/err.h>
c6c19332	25	#include <linux/i2c.h>
1176b5be	26	#include <linux/regmap.h>
62f6b087	27	#include <linux/regulator/of_regulator.h>
c6c19332 MR	28
	29	#include <linux/mfd/core.h>
	30	#include <linux/mfd/tps6586x.h>
	31
c26448c4 GK	32	/* interrupt control registers */
	33	#define TPS6586X_INT_ACK1 0xb5
	34	#define TPS6586X_INT_ACK2 0xb6
	35	#define TPS6586X_INT_ACK3 0xb7
	36	#define TPS6586X_INT_ACK4 0xb8
	37
	38	/* interrupt mask registers */
	39	#define TPS6586X_INT_MASK1 0xb0
	40	#define TPS6586X_INT_MASK2 0xb1
	41	#define TPS6586X_INT_MASK3 0xb2
	42	#define TPS6586X_INT_MASK4 0xb3
	43	#define TPS6586X_INT_MASK5 0xb4
	44
c6c19332 MR	45	/* device id */
c6c19332 MR	46	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	47
1176b5be LD	48	/* Maximum register */
	49	#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
	50
c26448c4 GK	51	struct tps6586x_irq_data {
	52	u8 mask_reg;
	53	u8 mask_mask;
	54	};
	55
	56	#define TPS6586X_IRQ(_reg, _mask) \
	57	{ \
	58	.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
	59	.mask_mask = (_mask), \
	60	}
	61
	62	static const struct tps6586x_irq_data tps6586x_irqs[] = {
	63	[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
	64	[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
	65	[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
	66	[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
	67	[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
	68	[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
	69	[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
	70	[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
	71	[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
	72	[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
	73	[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
	74	[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
	75	[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
	76	[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
	77	[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
	78	[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
	79	[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
	80	[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
	81	[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
	82	[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
	83	[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
	84	[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
	85	[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
	86	[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
	87	[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
	88	[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
	89	[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
	90	};
	91
7a7487cb LD	92	static struct mfd_cell tps6586x_cell[] = {
	93	{
	94	.name = "tps6586x-gpio",
	95	},
	96	{
	97	.name = "tps6586x-rtc",
	98	},
	99	{
	100	.name = "tps6586x-onkey",
	101	},
	102	};
	103
c6c19332	104	struct tps6586x {
c6c19332 MR	105	struct device *dev;
c6c19332 MR	106	struct i2c_client *client;
1176b5be	107	struct regmap *regmap;
c6c19332	108
c26448c4 GK	109	struct irq_chip irq_chip;
	110	struct mutex irq_lock;
	111	int irq_base;
	112	u32 irq_en;
c26448c4	113	u8 mask_reg[5];
c6c19332 MR	114	};
c6c19332 MR	115
1176b5be	116	static inline struct tps6586x dev_to_tps6586x(struct device dev)
c6c19332	117	{
1176b5be	118	return i2c_get_clientdata(to_i2c_client(dev));
c6c19332 MR	119	}
	120
	121	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	122	{
1176b5be LD	123	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	124
	125	return regmap_write(tps6586x->regmap, reg, val);
c6c19332 MR	126	}
	127	EXPORT_SYMBOL_GPL(tps6586x_write);
	128
	129	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	130	{
1176b5be LD	131	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	132
	133	return regmap_bulk_write(tps6586x->regmap, reg, val, len);
c6c19332 MR	134	}
	135	EXPORT_SYMBOL_GPL(tps6586x_writes);
	136
	137	int tps6586x_read(struct device dev, int reg, uint8_t val)
	138	{
1176b5be LD	139	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
	140	unsigned int rval;
	141	int ret;
	142
	143	ret = regmap_read(tps6586x->regmap, reg, &rval);
	144	if (!ret)
	145	*val = rval;
	146	return ret;
c6c19332 MR	147	}
	148	EXPORT_SYMBOL_GPL(tps6586x_read);
	149
	150	int tps6586x_reads(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_read(tps6586x->regmap, reg, val, len);
c6c19332 MR	155	}
	156	EXPORT_SYMBOL_GPL(tps6586x_reads);
	157
	158	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	159	{
1176b5be	160	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	161
1176b5be	162	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
c6c19332 MR	163	}
	164	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	165
	166	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	167	{
1176b5be	168	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	169
1176b5be	170	return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
c6c19332 MR	171	}
	172	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	173
	174	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	175	{
1176b5be	176	struct tps6586x *tps6586x = dev_to_tps6586x(dev);
c6c19332	177
1176b5be	178	return regmap_update_bits(tps6586x->regmap, reg, mask, val);
c6c19332 MR	179	}
	180	EXPORT_SYMBOL_GPL(tps6586x_update);
	181
c6c19332 MR	182	static int __remove_subdev(struct device dev, void unused)
	183	{
	184	platform_device_unregister(to_platform_device(dev));
	185	return 0;
	186	}
	187
	188	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	189	{
	190	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	191	}
	192
96e824bd	193	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	194	{
96e824bd	195	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	196
	197	mutex_lock(&tps6586x->irq_lock);
	198	}
	199
96e824bd	200	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	201	{
96e824bd MB	202	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
96e824bd MB	203	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	204	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	205
	206	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	207	tps6586x->irq_en \|= (1 << __irq);
	208	}
	209
96e824bd	210	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	211	{
96e824bd	212	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	213
96e824bd	214	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	215	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	216
	217	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	218	tps6586x->irq_en &= ~(1 << __irq);
	219	}
	220
96e824bd	221	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	222	{
96e824bd	223	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	224	int i;
	225
	226	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
75edd5af LD	227	int ret;
	228	ret = tps6586x_write(tps6586x->dev,
	229	TPS6586X_INT_MASK1 + i,
	230	tps6586x->mask_reg[i]);
	231	WARN_ON(ret);
c26448c4 GK	232	}
	233
	234	mutex_unlock(&tps6586x->irq_lock);
	235	}
	236
	237	static irqreturn_t tps6586x_irq(int irq, void *data)
	238	{
	239	struct tps6586x *tps6586x = data;
	240	u32 acks;
	241	int ret = 0;
	242
	243	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	244	sizeof(acks), (uint8_t *)&acks);
	245
	246	if (ret < 0) {
	247	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	248	return IRQ_NONE;
	249	}
	250
	251	acks = le32_to_cpu(acks);
	252
	253	while (acks) {
	254	int i = __ffs(acks);
	255
	256	if (tps6586x->irq_en & (1 << i))
	257	handle_nested_irq(tps6586x->irq_base + i);
	258
	259	acks &= ~(1 << i);
	260	}
	261
	262	return IRQ_HANDLED;
	263	}
	264
	265	static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
	266	int irq_base)
	267	{
	268	int i, ret;
	269	u8 tmp[4];
	270
	271	if (!irq_base) {
	272	dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
	273	return -EINVAL;
	274	}
	275
	276	mutex_init(&tps6586x->irq_lock);
	277	for (i = 0; i < 5; i++) {
c26448c4 GK	278	tps6586x->mask_reg[i] = 0xff;
	279	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	280	}
	281
	282	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	283
	284	tps6586x->irq_base = irq_base;
	285
	286	tps6586x->irq_chip.name = "tps6586x";
96e824bd MB	287	tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
	288	tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
	289	tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
	290	tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
c26448c4 GK	291
	292	for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
	293	int __irq = i + tps6586x->irq_base;
d5bb1221 TG	294	irq_set_chip_data(__irq, tps6586x);
d5bb1221 TG	295	irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
c26448c4	296	handle_simple_irq);
d5bb1221	297	irq_set_nested_thread(__irq, 1);
c26448c4 GK	298	#ifdef CONFIG_ARM
	299	set_irq_flags(__irq, IRQF_VALID);
	300	#endif
	301	}
	302
	303	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	304	"tps6586x", tps6586x);
	305
	306	if (!ret) {
	307	device_init_wakeup(tps6586x->dev, 1);
	308	enable_irq_wake(irq);
	309	}
	310
	311	return ret;
	312	}
	313
c6c19332 MR	314	static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
	315	struct tps6586x_platform_data *pdata)
	316	{
	317	struct tps6586x_subdev_info *subdev;
	318	struct platform_device *pdev;
	319	int i, ret = 0;
	320
	321	for (i = 0; i < pdata->num_subdevs; i++) {
	322	subdev = &pdata->subdevs[i];
	323
	324	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	325	if (!pdev) {
	326	ret = -ENOMEM;
	327	goto failed;
	328	}
c6c19332 MR	329
	330	pdev->dev.parent = tps6586x->dev;
	331	pdev->dev.platform_data = subdev->platform_data;
62f6b087	332	pdev->dev.of_node = subdev->of_node;
c6c19332 MR	333
c6c19332 MR	334	ret = platform_device_add(pdev);
929980ab AL	335	if (ret) {
929980ab AL	336	platform_device_put(pdev);
c6c19332	337	goto failed;
929980ab	338	}
c6c19332 MR	339	}
	340	return 0;
	341
	342	failed:
	343	tps6586x_remove_subdevs(tps6586x);
	344	return ret;
	345	}
	346
62f6b087 TR	347	#ifdef CONFIG_OF
	348	static struct of_regulator_match tps6586x_matches[] = {
	349	{ .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
	350	{ .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
	351	{ .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
	352	{ .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
	353	{ .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
	354	{ .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
	355	{ .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
	356	{ .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
	357	{ .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
	358	{ .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
	359	{ .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
	360	{ .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
	361	{ .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
	362	{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
	363	};
	364
	365	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	366	{
	367	const unsigned int num = ARRAY_SIZE(tps6586x_matches);
	368	struct device_node *np = client->dev.of_node;
	369	struct tps6586x_platform_data *pdata;
	370	struct tps6586x_subdev_info *devs;
	371	struct device_node *regs;
	372	unsigned int count;
	373	unsigned int i, j;
	374	int err;
	375
	376	regs = of_find_node_by_name(np, "regulators");
	377	if (!regs)
	378	return NULL;
	379
	380	err = of_regulator_match(&client->dev, regs, tps6586x_matches, num);
	381	if (err < 0) {
	382	of_node_put(regs);
	383	return NULL;
	384	}
	385
	386	of_node_put(regs);
	387	count = err;
	388
	389	devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL);
	390	if (!devs)
	391	return NULL;
	392
	393	for (i = 0, j = 0; i < num && j < count; i++) {
	394	if (!tps6586x_matches[i].init_data)
	395	continue;
	396
	397	devs[j].name = "tps6586x-regulator";
	398	devs[j].platform_data = tps6586x_matches[i].init_data;
	399	devs[j].id = (int)tps6586x_matches[i].driver_data;
	400	devs[j].of_node = tps6586x_matches[i].of_node;
	401	j++;
	402	}
	403
	404	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
	405	if (!pdata)
	406	return NULL;
	407
	408	pdata->num_subdevs = count;
	409	pdata->subdevs = devs;
	410	pdata->gpio_base = -1;
411	pdata->irq_base = -1;
412
413	return pdata;
414	}
415
416	static struct of_device_id tps6586x_of_match[] = {
417	{ .compatible = "ti,tps6586x", },
418	{ },
419	};
420	#else
421	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
422	{
423	return NULL;
424	}
425	#endif
426
75edd5af LD	427	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	428	{
	429	/* Cache all interrupt mask register */
	430	if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
	431	return false;
	432
	433	return true;
	434	}
	435
1176b5be LD	436	static const struct regmap_config tps6586x_regmap_config = {
	437	.reg_bits = 8,
	438	.val_bits = 8,
	439	.max_register = TPS6586X_MAX_REGISTER - 1,
75edd5af LD	440	.volatile_reg = is_volatile_reg,
75edd5af LD	441	.cache_type = REGCACHE_RBTREE,
1176b5be LD	442	};
1176b5be LD	443
c6c19332 MR	444	static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
	445	const struct i2c_device_id *id)
	446	{
	447	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	448	struct tps6586x *tps6586x;
	449	int ret;
	450
62f6b087 TR	451	if (!pdata && client->dev.of_node)
	452	pdata = tps6586x_parse_dt(client);
	453
c6c19332 MR	454	if (!pdata) {
	455	dev_err(&client->dev, "tps6586x requires platform data\n");
	456	return -ENOTSUPP;
	457	}
	458
	459	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	460	if (ret < 0) {
	461	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	462	return -EIO;
	463	}
	464
4d1cdbf6	465	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332	466
b6719412 LD	467	tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
	468	if (tps6586x == NULL) {
	469	dev_err(&client->dev, "memory for tps6586x alloc failed\n");
c6c19332	470	return -ENOMEM;
b6719412	471	}
c6c19332 MR	472
	473	tps6586x->client = client;
	474	tps6586x->dev = &client->dev;
	475	i2c_set_clientdata(client, tps6586x);
	476
1176b5be LD	477	tps6586x->regmap = devm_regmap_init_i2c(client,
	478	&tps6586x_regmap_config);
	479	if (IS_ERR(tps6586x->regmap)) {
	480	ret = PTR_ERR(tps6586x->regmap);
	481	dev_err(&client->dev, "regmap init failed: %d\n", ret);
	482	return ret;
	483	}
	484
c6c19332	485
c26448c4 GK	486	if (client->irq) {
	487	ret = tps6586x_irq_init(tps6586x, client->irq,
	488	pdata->irq_base);
	489	if (ret) {
	490	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
b6719412	491	return ret;
c26448c4 GK	492	}
	493	}
	494
7a7487cb LD	495	ret = mfd_add_devices(tps6586x->dev, -1,
	496	tps6586x_cell, ARRAY_SIZE(tps6586x_cell), NULL, 0);
	497	if (ret < 0) {
	498	dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
	499	goto err_mfd_add;
6f9f13bf VP	500	}
6f9f13bf VP	501
c6c19332 MR	502	ret = tps6586x_add_subdevs(tps6586x, pdata);
	503	if (ret) {
	504	dev_err(&client->dev, "add devices failed: %d\n", ret);
	505	goto err_add_devs;
	506	}
	507
c6c19332 MR	508	return 0;
	509
	510	err_add_devs:
7a7487cb LD	511	mfd_remove_devices(tps6586x->dev);
7a7487cb LD	512	err_mfd_add:
c26448c4 GK	513	if (client->irq)
c26448c4 GK	514	free_irq(client->irq, tps6586x);
c6c19332 MR	515	return ret;
	516	}
	517
	518	static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
	519	{
4b751cf5	520	struct tps6586x *tps6586x = i2c_get_clientdata(client);
4b751cf5	521
7a7487cb LD	522	tps6586x_remove_subdevs(tps6586x);
7a7487cb LD	523	mfd_remove_devices(tps6586x->dev);
c26448c4 GK	524	if (client->irq)
c26448c4 GK	525	free_irq(client->irq, tps6586x);
c6c19332 MR	526	return 0;
	527	}
	528
	529	static const struct i2c_device_id tps6586x_id_table[] = {
	530	{ "tps6586x", 0 },
	531	{ },
	532	};
	533	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	534
	535	static struct i2c_driver tps6586x_driver = {
	536	.driver = {
	537	.name = "tps6586x",
	538	.owner = THIS_MODULE,
62f6b087	539	.of_match_table = of_match_ptr(tps6586x_of_match),
c6c19332 MR	540	},
	541	.probe = tps6586x_i2c_probe,
	542	.remove = __devexit_p(tps6586x_i2c_remove),
	543	.id_table = tps6586x_id_table,
	544	};
	545
	546	static int __init tps6586x_init(void)
	547	{
	548	return i2c_add_driver(&tps6586x_driver);
	549	}
	550	subsys_initcall(tps6586x_init);
	551
	552	static void __exit tps6586x_exit(void)
	553	{
	554	i2c_del_driver(&tps6586x_driver);
	555	}
	556	module_exit(tps6586x_exit);
	557
	558	MODULE_DESCRIPTION("TPS6586X core driver");
	559	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	560	MODULE_LICENSE("GPL");