[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/gpio.h>
#include <linux/i2c.h>
#include <linux/regulator/of_regulator.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, i;

	for (i = 0; i < len; i++) {
		ret = __tps6586x_write(client, reg + i, *(val + i));
		if (ret < 0)
			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) != 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_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_update(tps6586x->dev, TPS6586X_GPIOSET2,
			value << offset, 1 << 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 int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
{
	if (!gpio_base)
		return 0;

	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;

	return gpiochip_add(&tps6586x->gpio);
}

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;
		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 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 = 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_gpio_init(tps6586x, pdata->gpio_base);
	if (ret) {
		dev_err(&client->dev, "GPIO registration failed: %d\n", ret);
		goto err_gpio_init;
	}

	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:
	if (pdata->gpio_base) {
		ret = gpiochip_remove(&tps6586x->gpio);
		if (ret)
			dev_err(&client->dev, "Can't remove gpio chip: %d\n",
				ret);
	}
err_gpio_init:
	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,
		.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>
	24	#include <linux/gpio.h>
	25	#include <linux/i2c.h>
62f6b087	26	#include <linux/regulator/of_regulator.h>
c6c19332 MR	27
	28	#include <linux/mfd/core.h>
	29	#include <linux/mfd/tps6586x.h>
	30
	31	/* GPIO control registers */
	32	#define TPS6586X_GPIOSET1 0x5d
	33	#define TPS6586X_GPIOSET2 0x5e
	34
c26448c4 GK	35	/* interrupt control registers */
	36	#define TPS6586X_INT_ACK1 0xb5
	37	#define TPS6586X_INT_ACK2 0xb6
	38	#define TPS6586X_INT_ACK3 0xb7
	39	#define TPS6586X_INT_ACK4 0xb8
	40
	41	/* interrupt mask registers */
	42	#define TPS6586X_INT_MASK1 0xb0
	43	#define TPS6586X_INT_MASK2 0xb1
	44	#define TPS6586X_INT_MASK3 0xb2
	45	#define TPS6586X_INT_MASK4 0xb3
	46	#define TPS6586X_INT_MASK5 0xb4
	47
c6c19332 MR	48	/* device id */
c6c19332 MR	49	#define TPS6586X_VERSIONCRC 0xcd
c6c19332	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
c6c19332 MR	92	struct tps6586x {
	93	struct mutex lock;
	94	struct device *dev;
	95	struct i2c_client *client;
	96
	97	struct gpio_chip gpio;
c26448c4 GK	98	struct irq_chip irq_chip;
	99	struct mutex irq_lock;
	100	int irq_base;
	101	u32 irq_en;
	102	u8 mask_cache[5];
	103	u8 mask_reg[5];
c6c19332 MR	104	};
	105
	106	static inline int __tps6586x_read(struct i2c_client *client,
	107	int reg, uint8_t *val)
	108	{
	109	int ret;
	110
	111	ret = i2c_smbus_read_byte_data(client, reg);
	112	if (ret < 0) {
	113	dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
	114	return ret;
	115	}
	116
	117	*val = (uint8_t)ret;
	118
	119	return 0;
	120	}
	121
	122	static inline int __tps6586x_reads(struct i2c_client *client, int reg,
	123	int len, uint8_t *val)
	124	{
	125	int ret;
	126
	127	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
	128	if (ret < 0) {
	129	dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
	130	return ret;
	131	}
	132
	133	return 0;
	134	}
	135
	136	static inline int __tps6586x_write(struct i2c_client *client,
	137	int reg, uint8_t val)
	138	{
	139	int ret;
	140
	141	ret = i2c_smbus_write_byte_data(client, reg, val);
	142	if (ret < 0) {
	143	dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
	144	val, reg);
	145	return ret;
	146	}
	147
	148	return 0;
	149	}
	150
	151	static inline int __tps6586x_writes(struct i2c_client *client, int reg,
	152	int len, uint8_t *val)
	153	{
4b57018d	154	int ret, i;
c6c19332	155
4b57018d	156	for (i = 0; i < len; i++) {
	157	ret = __tps6586x_write(client, reg + i, *(val + i));
	158	if (ret < 0)
	159	return ret;
c6c19332 MR	160	}
	161
	162	return 0;
	163	}
	164
	165	int tps6586x_write(struct device *dev, int reg, uint8_t val)
	166	{
	167	return __tps6586x_write(to_i2c_client(dev), reg, val);
	168	}
	169	EXPORT_SYMBOL_GPL(tps6586x_write);
	170
	171	int tps6586x_writes(struct device dev, int reg, int len, uint8_t val)
	172	{
	173	return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
	174	}
	175	EXPORT_SYMBOL_GPL(tps6586x_writes);
	176
	177	int tps6586x_read(struct device dev, int reg, uint8_t val)
	178	{
	179	return __tps6586x_read(to_i2c_client(dev), reg, val);
	180	}
	181	EXPORT_SYMBOL_GPL(tps6586x_read);
	182
	183	int tps6586x_reads(struct device dev, int reg, int len, uint8_t val)
	184	{
	185	return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
	186	}
	187	EXPORT_SYMBOL_GPL(tps6586x_reads);
	188
	189	int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
	190	{
	191	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	192	uint8_t reg_val;
	193	int ret = 0;
	194
	195	mutex_lock(&tps6586x->lock);
	196
	197	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
	198	if (ret)
	199	goto out;
	200
26bc4e0c	201	if ((reg_val & bit_mask) != bit_mask) {
c6c19332 MR	202	reg_val \|= bit_mask;
	203	ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
	204	}
	205	out:
	206	mutex_unlock(&tps6586x->lock);
	207	return ret;
	208	}
	209	EXPORT_SYMBOL_GPL(tps6586x_set_bits);
	210
	211	int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
	212	{
	213	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	214	uint8_t reg_val;
	215	int ret = 0;
	216
	217	mutex_lock(&tps6586x->lock);
	218
	219	ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
	220	if (ret)
	221	goto out;
	222
	223	if (reg_val & bit_mask) {
	224	reg_val &= ~bit_mask;
	225	ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
	226	}
	227	out:
	228	mutex_unlock(&tps6586x->lock);
	229	return ret;
	230	}
	231	EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
	232
	233	int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
	234	{
	235	struct tps6586x *tps6586x = dev_get_drvdata(dev);
	236	uint8_t reg_val;
	237	int ret = 0;
	238
	239	mutex_lock(&tps6586x->lock);
	240
	241	ret = __tps6586x_read(tps6586x->client, reg, &reg_val);
	242	if (ret)
	243	goto out;
	244
	245	if ((reg_val & mask) != val) {
	246	reg_val = (reg_val & ~mask) \| val;
	247	ret = __tps6586x_write(tps6586x->client, reg, reg_val);
	248	}
	249	out:
	250	mutex_unlock(&tps6586x->lock);
	251	return ret;
	252	}
	253	EXPORT_SYMBOL_GPL(tps6586x_update);
	254
	255	static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
	256	{
	257	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
	258	uint8_t val;
	259	int ret;
	260
	261	ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
	262	if (ret)
	263	return ret;
	264
	265	return !!(val & (1 << offset));
266	}
267
268
269	static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
270	int value)
271	{
272	struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);
273
e6f1945b VP	274	tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET2,
e6f1945b VP	275	value << offset, 1 << offset);
c6c19332 MR	276	}
	277
	278	static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
	279	int value)
	280	{
	281	struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
	282	uint8_t val, mask;
	283
	284	tps6586x_gpio_set(gc, offset, value);
	285
	286	val = 0x1 << (offset * 2);
	287	mask = 0x3 << (offset * 2);
	288
	289	return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
	290	}
	291
6f9f13bf	292	static int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
c6c19332	293	{
c6c19332	294	if (!gpio_base)
6f9f13bf	295	return 0;
c6c19332 MR	296
	297	tps6586x->gpio.owner = THIS_MODULE;
	298	tps6586x->gpio.label = tps6586x->client->name;
	299	tps6586x->gpio.dev = tps6586x->dev;
	300	tps6586x->gpio.base = gpio_base;
	301	tps6586x->gpio.ngpio = 4;
	302	tps6586x->gpio.can_sleep = 1;
	303
	304	/* FIXME: add handling of GPIOs as dedicated inputs */
	305	tps6586x->gpio.direction_output = tps6586x_gpio_output;
	306	tps6586x->gpio.set = tps6586x_gpio_set;
	307	tps6586x->gpio.get = tps6586x_gpio_get;
	308
6f9f13bf	309	return gpiochip_add(&tps6586x->gpio);
c6c19332 MR	310	}
	311
	312	static int __remove_subdev(struct device dev, void unused)
	313	{
	314	platform_device_unregister(to_platform_device(dev));
	315	return 0;
	316	}
	317
	318	static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
	319	{
	320	return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
	321	}
	322
96e824bd	323	static void tps6586x_irq_lock(struct irq_data *data)
c26448c4	324	{
96e824bd	325	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	326
	327	mutex_lock(&tps6586x->irq_lock);
	328	}
	329
96e824bd	330	static void tps6586x_irq_enable(struct irq_data *irq_data)
c26448c4	331	{
96e824bd MB	332	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
96e824bd MB	333	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	334	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	335
	336	tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
	337	tps6586x->irq_en \|= (1 << __irq);
	338	}
	339
96e824bd	340	static void tps6586x_irq_disable(struct irq_data *irq_data)
c26448c4	341	{
96e824bd	342	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
c26448c4	343
96e824bd	344	unsigned int __irq = irq_data->irq - tps6586x->irq_base;
c26448c4 GK	345	const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
	346
	347	tps6586x->mask_reg[data->mask_reg] \|= data->mask_mask;
	348	tps6586x->irq_en &= ~(1 << __irq);
	349	}
	350
96e824bd	351	static void tps6586x_irq_sync_unlock(struct irq_data *data)
c26448c4	352	{
96e824bd	353	struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
c26448c4 GK	354	int i;
	355
	356	for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
	357	if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
	358	if (!WARN_ON(tps6586x_write(tps6586x->dev,
	359	TPS6586X_INT_MASK1 + i,
	360	tps6586x->mask_reg[i])))
	361	tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
	362	}
	363	}
	364
	365	mutex_unlock(&tps6586x->irq_lock);
	366	}
	367
	368	static irqreturn_t tps6586x_irq(int irq, void *data)
	369	{
	370	struct tps6586x *tps6586x = data;
	371	u32 acks;
	372	int ret = 0;
	373
	374	ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
	375	sizeof(acks), (uint8_t *)&acks);
	376
	377	if (ret < 0) {
	378	dev_err(tps6586x->dev, "failed to read interrupt status\n");
	379	return IRQ_NONE;
	380	}
	381
	382	acks = le32_to_cpu(acks);
	383
	384	while (acks) {
	385	int i = __ffs(acks);
	386
	387	if (tps6586x->irq_en & (1 << i))
	388	handle_nested_irq(tps6586x->irq_base + i);
	389
	390	acks &= ~(1 << i);
	391	}
	392
	393	return IRQ_HANDLED;
	394	}
	395
	396	static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
	397	int irq_base)
	398	{
	399	int i, ret;
	400	u8 tmp[4];
	401
	402	if (!irq_base) {
	403	dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
	404	return -EINVAL;
	405	}
	406
	407	mutex_init(&tps6586x->irq_lock);
	408	for (i = 0; i < 5; i++) {
	409	tps6586x->mask_cache[i] = 0xff;
	410	tps6586x->mask_reg[i] = 0xff;
	411	tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
	412	}
	413
	414	tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
	415
	416	tps6586x->irq_base = irq_base;
	417
418	tps6586x->irq_chip.name = "tps6586x";
96e824bd MB	419	tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
	420	tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
	421	tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
	422	tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
c26448c4 GK	423
	424	for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
	425	int __irq = i + tps6586x->irq_base;
d5bb1221 TG	426	irq_set_chip_data(__irq, tps6586x);
d5bb1221 TG	427	irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
c26448c4	428	handle_simple_irq);
d5bb1221	429	irq_set_nested_thread(__irq, 1);
c26448c4 GK	430	#ifdef CONFIG_ARM
	431	set_irq_flags(__irq, IRQF_VALID);
	432	#endif
	433	}
	434
	435	ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
	436	"tps6586x", tps6586x);
	437
	438	if (!ret) {
	439	device_init_wakeup(tps6586x->dev, 1);
	440	enable_irq_wake(irq);
	441	}
	442
	443	return ret;
	444	}
	445
c6c19332 MR	446	static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
	447	struct tps6586x_platform_data *pdata)
	448	{
	449	struct tps6586x_subdev_info *subdev;
	450	struct platform_device *pdev;
	451	int i, ret = 0;
	452
	453	for (i = 0; i < pdata->num_subdevs; i++) {
	454	subdev = &pdata->subdevs[i];
	455
	456	pdev = platform_device_alloc(subdev->name, subdev->id);
929980ab AL	457	if (!pdev) {
	458	ret = -ENOMEM;
	459	goto failed;
	460	}
c6c19332 MR	461
	462	pdev->dev.parent = tps6586x->dev;
	463	pdev->dev.platform_data = subdev->platform_data;
62f6b087	464	pdev->dev.of_node = subdev->of_node;
c6c19332 MR	465
c6c19332 MR	466	ret = platform_device_add(pdev);
929980ab AL	467	if (ret) {
929980ab AL	468	platform_device_put(pdev);
c6c19332	469	goto failed;
929980ab	470	}
c6c19332 MR	471	}
	472	return 0;
	473
	474	failed:
	475	tps6586x_remove_subdevs(tps6586x);
	476	return ret;
	477	}
	478
62f6b087 TR	479	#ifdef CONFIG_OF
	480	static struct of_regulator_match tps6586x_matches[] = {
	481	{ .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
	482	{ .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
	483	{ .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
	484	{ .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
	485	{ .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
	486	{ .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
	487	{ .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
	488	{ .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
	489	{ .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
	490	{ .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
	491	{ .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
	492	{ .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
	493	{ .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
	494	{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
	495	};
	496
	497	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
	498	{
	499	const unsigned int num = ARRAY_SIZE(tps6586x_matches);
	500	struct device_node *np = client->dev.of_node;
	501	struct tps6586x_platform_data *pdata;
	502	struct tps6586x_subdev_info *devs;
	503	struct device_node *regs;
	504	unsigned int count;
	505	unsigned int i, j;
	506	int err;
	507
	508	regs = of_find_node_by_name(np, "regulators");
	509	if (!regs)
	510	return NULL;
	511
	512	err = of_regulator_match(&client->dev, regs, tps6586x_matches, num);
	513	if (err < 0) {
	514	of_node_put(regs);
	515	return NULL;
	516	}
	517
	518	of_node_put(regs);
	519	count = err;
	520
	521	devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL);
	522	if (!devs)
	523	return NULL;
	524
	525	for (i = 0, j = 0; i < num && j < count; i++) {
	526	if (!tps6586x_matches[i].init_data)
	527	continue;
	528
	529	devs[j].name = "tps6586x-regulator";
	530	devs[j].platform_data = tps6586x_matches[i].init_data;
	531	devs[j].id = (int)tps6586x_matches[i].driver_data;
	532	devs[j].of_node = tps6586x_matches[i].of_node;
	533	j++;
	534	}
	535
	536	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
	537	if (!pdata)
	538	return NULL;
	539
	540	pdata->num_subdevs = count;
	541	pdata->subdevs = devs;
	542	pdata->gpio_base = -1;
543	pdata->irq_base = -1;
544
545	return pdata;
546	}
547
548	static struct of_device_id tps6586x_of_match[] = {
549	{ .compatible = "ti,tps6586x", },
550	{ },
551	};
552	#else
553	static struct tps6586x_platform_data tps6586x_parse_dt(struct i2c_client client)
554	{
555	return NULL;
556	}
557	#endif
558
c6c19332 MR	559	static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
	560	const struct i2c_device_id *id)
	561	{
	562	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	563	struct tps6586x *tps6586x;
	564	int ret;
	565
62f6b087 TR	566	if (!pdata && client->dev.of_node)
	567	pdata = tps6586x_parse_dt(client);
	568
c6c19332 MR	569	if (!pdata) {
	570	dev_err(&client->dev, "tps6586x requires platform data\n");
	571	return -ENOTSUPP;
	572	}
	573
	574	ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
	575	if (ret < 0) {
	576	dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
	577	return -EIO;
	578	}
	579
4d1cdbf6	580	dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
c6c19332 MR	581
	582	tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
	583	if (tps6586x == NULL)
	584	return -ENOMEM;
	585
	586	tps6586x->client = client;
	587	tps6586x->dev = &client->dev;
	588	i2c_set_clientdata(client, tps6586x);
	589
	590	mutex_init(&tps6586x->lock);
	591
c26448c4 GK	592	if (client->irq) {
	593	ret = tps6586x_irq_init(tps6586x, client->irq,
	594	pdata->irq_base);
	595	if (ret) {
	596	dev_err(&client->dev, "IRQ init failed: %d\n", ret);
	597	goto err_irq_init;
	598	}
	599	}
	600
6f9f13bf VP	601	ret = tps6586x_gpio_init(tps6586x, pdata->gpio_base);
	602	if (ret) {
	603	dev_err(&client->dev, "GPIO registration failed: %d\n", ret);
	604	goto err_gpio_init;
	605	}
	606
c6c19332 MR	607	ret = tps6586x_add_subdevs(tps6586x, pdata);
	608	if (ret) {
	609	dev_err(&client->dev, "add devices failed: %d\n", ret);
	610	goto err_add_devs;
	611	}
	612
c6c19332 MR	613	return 0;
	614
	615	err_add_devs:
6f9f13bf VP	616	if (pdata->gpio_base) {
	617	ret = gpiochip_remove(&tps6586x->gpio);
	618	if (ret)
	619	dev_err(&client->dev, "Can't remove gpio chip: %d\n",
	620	ret);
	621	}
	622	err_gpio_init:
c26448c4 GK	623	if (client->irq)
	624	free_irq(client->irq, tps6586x);
	625	err_irq_init:
c6c19332 MR	626	kfree(tps6586x);
	627	return ret;
	628	}
	629
	630	static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
	631	{
4b751cf5 AL	632	struct tps6586x *tps6586x = i2c_get_clientdata(client);
	633	struct tps6586x_platform_data *pdata = client->dev.platform_data;
	634	int ret;
	635
c26448c4 GK	636	if (client->irq)
	637	free_irq(client->irq, tps6586x);
	638
4b751cf5 AL	639	if (pdata->gpio_base) {
	640	ret = gpiochip_remove(&tps6586x->gpio);
	641	if (ret)
	642	dev_err(&client->dev, "Can't remove gpio chip: %d\n",
	643	ret);
	644	}
	645
	646	tps6586x_remove_subdevs(tps6586x);
	647	kfree(tps6586x);
c6c19332 MR	648	return 0;
	649	}
	650
	651	static const struct i2c_device_id tps6586x_id_table[] = {
	652	{ "tps6586x", 0 },
	653	{ },
	654	};
	655	MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
	656
	657	static struct i2c_driver tps6586x_driver = {
	658	.driver = {
	659	.name = "tps6586x",
	660	.owner = THIS_MODULE,
62f6b087	661	.of_match_table = of_match_ptr(tps6586x_of_match),
c6c19332 MR	662	},
	663	.probe = tps6586x_i2c_probe,
	664	.remove = __devexit_p(tps6586x_i2c_remove),
	665	.id_table = tps6586x_id_table,
	666	};
	667
	668	static int __init tps6586x_init(void)
	669	{
	670	return i2c_add_driver(&tps6586x_driver);
	671	}
	672	subsys_initcall(tps6586x_init);
	673
	674	static void __exit tps6586x_exit(void)
	675	{
	676	i2c_del_driver(&tps6586x_driver);
	677	}
	678	module_exit(tps6586x_exit);
	679
	680	MODULE_DESCRIPTION("TPS6586X core driver");
	681	MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
	682	MODULE_LICENSE("GPL");