[linux-2.6-block.git] / drivers / mfd / tc3589x.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License, version 2
 * Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson
 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tc3589x.h>

/**
 * enum tc3589x_version - indicates the TC3589x version
 */
enum tc3589x_version {
	TC3589X_TC35890,
	TC3589X_TC35892,
	TC3589X_TC35893,
	TC3589X_TC35894,
	TC3589X_TC35895,
	TC3589X_TC35896,
	TC3589X_UNKNOWN,
};

#define TC3589x_CLKMODE_MODCTL_SLEEP		0x0
#define TC3589x_CLKMODE_MODCTL_OPERATION	(1 << 0)

/**
 * tc3589x_reg_read() - read a single TC3589x register
 * @tc3589x:	Device to read from
 * @reg:	Register to read
 */
int tc3589x_reg_read(struct tc3589x *tc3589x, u8 reg)
{
	int ret;

	ret = i2c_smbus_read_byte_data(tc3589x->i2c, reg);
	if (ret < 0)
		dev_err(tc3589x->dev, "failed to read reg %#x: %d\n",
			reg, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(tc3589x_reg_read);

/**
 * tc3589x_reg_read() - write a single TC3589x register
 * @tc3589x:	Device to write to
 * @reg:	Register to read
 * @data:	Value to write
 */
int tc3589x_reg_write(struct tc3589x *tc3589x, u8 reg, u8 data)
{
	int ret;

	ret = i2c_smbus_write_byte_data(tc3589x->i2c, reg, data);
	if (ret < 0)
		dev_err(tc3589x->dev, "failed to write reg %#x: %d\n",
			reg, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(tc3589x_reg_write);

/**
 * tc3589x_block_read() - read multiple TC3589x registers
 * @tc3589x:	Device to read from
 * @reg:	First register
 * @length:	Number of registers
 * @values:	Buffer to write to
 */
int tc3589x_block_read(struct tc3589x *tc3589x, u8 reg, u8 length, u8 *values)
{
	int ret;

	ret = i2c_smbus_read_i2c_block_data(tc3589x->i2c, reg, length, values);
	if (ret < 0)
		dev_err(tc3589x->dev, "failed to read regs %#x: %d\n",
			reg, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(tc3589x_block_read);

/**
 * tc3589x_block_write() - write multiple TC3589x registers
 * @tc3589x:	Device to write to
 * @reg:	First register
 * @length:	Number of registers
 * @values:	Values to write
 */
int tc3589x_block_write(struct tc3589x *tc3589x, u8 reg, u8 length,
			const u8 *values)
{
	int ret;

	ret = i2c_smbus_write_i2c_block_data(tc3589x->i2c, reg, length,
					     values);
	if (ret < 0)
		dev_err(tc3589x->dev, "failed to write regs %#x: %d\n",
			reg, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(tc3589x_block_write);

/**
 * tc3589x_set_bits() - set the value of a bitfield in a TC3589x register
 * @tc3589x:	Device to write to
 * @reg:	Register to write
 * @mask:	Mask of bits to set
 * @values:	Value to set
 */
int tc3589x_set_bits(struct tc3589x *tc3589x, u8 reg, u8 mask, u8 val)
{
	int ret;

	mutex_lock(&tc3589x->lock);

	ret = tc3589x_reg_read(tc3589x, reg);
	if (ret < 0)
		goto out;

	ret &= ~mask;
	ret |= val;

	ret = tc3589x_reg_write(tc3589x, reg, ret);

out:
	mutex_unlock(&tc3589x->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(tc3589x_set_bits);

static struct resource gpio_resources[] = {
	{
		.start	= TC3589x_INT_GPIIRQ,
		.end	= TC3589x_INT_GPIIRQ,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource keypad_resources[] = {
	{
		.start  = TC3589x_INT_KBDIRQ,
		.end    = TC3589x_INT_KBDIRQ,
		.flags  = IORESOURCE_IRQ,
	},
};

static struct mfd_cell tc3589x_dev_gpio[] = {
	{
		.name		= "tc3589x-gpio",
		.num_resources	= ARRAY_SIZE(gpio_resources),
		.resources	= &gpio_resources[0],
		.of_compatible	= "tc3589x-gpio",
	},
};

static struct mfd_cell tc3589x_dev_keypad[] = {
	{
		.name           = "tc3589x-keypad",
		.num_resources  = ARRAY_SIZE(keypad_resources),
		.resources      = &keypad_resources[0],
		.of_compatible	= "tc3589x-keypad",
	},
};

static irqreturn_t tc3589x_irq(int irq, void *data)
{
	struct tc3589x *tc3589x = data;
	int status;

again:
	status = tc3589x_reg_read(tc3589x, TC3589x_IRQST);
	if (status < 0)
		return IRQ_NONE;

	while (status) {
		int bit = __ffs(status);
		int virq = irq_create_mapping(tc3589x->domain, bit);

		handle_nested_irq(virq);
		status &= ~(1 << bit);
	}

	/*
	 * A dummy read or write (to any register) appears to be necessary to
	 * have the last interrupt clear (for example, GPIO IC write) take
	 * effect. In such a case, recheck for any interrupt which is still
	 * pending.
	 */
	status = tc3589x_reg_read(tc3589x, TC3589x_IRQST);
	if (status)
		goto again;

	return IRQ_HANDLED;
}

static int tc3589x_irq_map(struct irq_domain *d, unsigned int virq,
				irq_hw_number_t hwirq)
{
	struct tc3589x *tc3589x = d->host_data;

	irq_set_chip_data(virq, tc3589x);
	irq_set_chip_and_handler(virq, &dummy_irq_chip,
				handle_edge_irq);
	irq_set_nested_thread(virq, 1);
#ifdef CONFIG_ARM
	set_irq_flags(virq, IRQF_VALID);
#else
	irq_set_noprobe(virq);
#endif

	return 0;
}

static void tc3589x_irq_unmap(struct irq_domain *d, unsigned int virq)
{
#ifdef CONFIG_ARM
	set_irq_flags(virq, 0);
#endif
	irq_set_chip_and_handler(virq, NULL, NULL);
	irq_set_chip_data(virq, NULL);
}

static struct irq_domain_ops tc3589x_irq_ops = {
	.map    = tc3589x_irq_map,
	.unmap  = tc3589x_irq_unmap,
	.xlate  = irq_domain_xlate_twocell,
};

static int tc3589x_irq_init(struct tc3589x *tc3589x, struct device_node *np)
{
	int base = tc3589x->irq_base;

	tc3589x->domain = irq_domain_add_simple(
		np, TC3589x_NR_INTERNAL_IRQS, base,
		&tc3589x_irq_ops, tc3589x);

	if (!tc3589x->domain) {
		dev_err(tc3589x->dev, "Failed to create irqdomain\n");
		return -ENOSYS;
	}

	return 0;
}

static int tc3589x_chip_init(struct tc3589x *tc3589x)
{
	int manf, ver, ret;

	manf = tc3589x_reg_read(tc3589x, TC3589x_MANFCODE);
	if (manf < 0)
		return manf;

	ver = tc3589x_reg_read(tc3589x, TC3589x_VERSION);
	if (ver < 0)
		return ver;

	if (manf != TC3589x_MANFCODE_MAGIC) {
		dev_err(tc3589x->dev, "unknown manufacturer: %#x\n", manf);
		return -EINVAL;
	}

	dev_info(tc3589x->dev, "manufacturer: %#x, version: %#x\n", manf, ver);

	/*
	 * Put everything except the IRQ module into reset;
	 * also spare the GPIO module for any pin initialization
	 * done during pre-kernel boot
	 */
	ret = tc3589x_reg_write(tc3589x, TC3589x_RSTCTRL,
				TC3589x_RSTCTRL_TIMRST
				| TC3589x_RSTCTRL_ROTRST
				| TC3589x_RSTCTRL_KBDRST);
	if (ret < 0)
		return ret;

	/* Clear the reset interrupt. */
	return tc3589x_reg_write(tc3589x, TC3589x_RSTINTCLR, 0x1);
}

static int tc3589x_device_init(struct tc3589x *tc3589x)
{
	int ret = 0;
	unsigned int blocks = tc3589x->pdata->block;

	if (blocks & TC3589x_BLOCK_GPIO) {
		ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_gpio,
				      ARRAY_SIZE(tc3589x_dev_gpio), NULL,
				      tc3589x->irq_base, tc3589x->domain);
		if (ret) {
			dev_err(tc3589x->dev, "failed to add gpio child\n");
			return ret;
		}
		dev_info(tc3589x->dev, "added gpio block\n");
	}

	if (blocks & TC3589x_BLOCK_KEYPAD) {
		ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_keypad,
				      ARRAY_SIZE(tc3589x_dev_keypad), NULL,
				      tc3589x->irq_base, tc3589x->domain);
		if (ret) {
			dev_err(tc3589x->dev, "failed to keypad child\n");
			return ret;
		}
		dev_info(tc3589x->dev, "added keypad block\n");
	}

	return ret;
}

static int tc3589x_of_probe(struct device_node *np,
			struct tc3589x_platform_data *pdata)
{
	struct device_node *child;

	for_each_child_of_node(np, child) {
		if (!strcmp(child->name, "tc3589x_gpio")) {
			pdata->block |= TC3589x_BLOCK_GPIO;
		}
		if (!strcmp(child->name, "tc3589x_keypad")) {
			pdata->block |= TC3589x_BLOCK_KEYPAD;
		}
	}

	return 0;
}

static int tc3589x_probe(struct i2c_client *i2c,
				   const struct i2c_device_id *id)
{
	struct tc3589x_platform_data *pdata = dev_get_platdata(&i2c->dev);
	struct device_node *np = i2c->dev.of_node;
	struct tc3589x *tc3589x;
	int ret;

	if (!pdata) {
		if (np) {
			pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
			if (!pdata)
				return -ENOMEM;

			ret = tc3589x_of_probe(np, pdata);
			if (ret)
				return ret;
		}
		else {
			dev_err(&i2c->dev, "No platform data or DT found\n");
			return -EINVAL;
		}
	}

	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA
				     | I2C_FUNC_SMBUS_I2C_BLOCK))
		return -EIO;

	tc3589x = devm_kzalloc(&i2c->dev, sizeof(struct tc3589x),
				GFP_KERNEL);
	if (!tc3589x)
		return -ENOMEM;

	mutex_init(&tc3589x->lock);

	tc3589x->dev = &i2c->dev;
	tc3589x->i2c = i2c;
	tc3589x->pdata = pdata;
	tc3589x->irq_base = pdata->irq_base;

	switch (id->driver_data) {
	case TC3589X_TC35893:
	case TC3589X_TC35895:
	case TC3589X_TC35896:
		tc3589x->num_gpio = 20;
		break;
	case TC3589X_TC35890:
	case TC3589X_TC35892:
	case TC3589X_TC35894:
	case TC3589X_UNKNOWN:
	default:
		tc3589x->num_gpio = 24;
		break;
	}

	i2c_set_clientdata(i2c, tc3589x);

	ret = tc3589x_chip_init(tc3589x);
	if (ret)
		return ret;

	ret = tc3589x_irq_init(tc3589x, np);
	if (ret)
		return ret;

	ret = request_threaded_irq(tc3589x->i2c->irq, NULL, tc3589x_irq,
				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
				   "tc3589x", tc3589x);
	if (ret) {
		dev_err(tc3589x->dev, "failed to request IRQ: %d\n", ret);
		return ret;
	}

	ret = tc3589x_device_init(tc3589x);
	if (ret) {
		dev_err(tc3589x->dev, "failed to add child devices\n");
		return ret;
	}

	return 0;
}

static int tc3589x_remove(struct i2c_client *client)
{
	struct tc3589x *tc3589x = i2c_get_clientdata(client);

	mfd_remove_devices(tc3589x->dev);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int tc3589x_suspend(struct device *dev)
{
	struct tc3589x *tc3589x = dev_get_drvdata(dev);
	struct i2c_client *client = tc3589x->i2c;
	int ret = 0;

	/* put the system to sleep mode */
	if (!device_may_wakeup(&client->dev))
		ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
				TC3589x_CLKMODE_MODCTL_SLEEP);

	return ret;
}

static int tc3589x_resume(struct device *dev)
{
	struct tc3589x *tc3589x = dev_get_drvdata(dev);
	struct i2c_client *client = tc3589x->i2c;
	int ret = 0;

	/* enable the system into operation */
	if (!device_may_wakeup(&client->dev))
		ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
				TC3589x_CLKMODE_MODCTL_OPERATION);

	return ret;
}
#endif

static SIMPLE_DEV_PM_OPS(tc3589x_dev_pm_ops, tc3589x_suspend, tc3589x_resume);

static const struct i2c_device_id tc3589x_id[] = {
	{ "tc35890", TC3589X_TC35890 },
	{ "tc35892", TC3589X_TC35892 },
	{ "tc35893", TC3589X_TC35893 },
	{ "tc35894", TC3589X_TC35894 },
	{ "tc35895", TC3589X_TC35895 },
	{ "tc35896", TC3589X_TC35896 },
	{ "tc3589x", TC3589X_UNKNOWN },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tc3589x_id);

static struct i2c_driver tc3589x_driver = {
	.driver.name	= "tc3589x",
	.driver.owner	= THIS_MODULE,
	.driver.pm	= &tc3589x_dev_pm_ops,
	.probe		= tc3589x_probe,
	.remove		= tc3589x_remove,
	.id_table	= tc3589x_id,
};

static int __init tc3589x_init(void)
{
	return i2c_add_driver(&tc3589x_driver);
}
subsys_initcall(tc3589x_init);

static void __exit tc3589x_exit(void)
{
	i2c_del_driver(&tc3589x_driver);
}
module_exit(tc3589x_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("TC3589x MFD core driver");
MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent");
Commit	Line	Data
b4ecd326 RV	1	/*
	2	* Copyright (C) ST-Ericsson SA 2010
	3	*
	4	* License Terms: GNU General Public License, version 2
	5	* Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson
	6	* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/interrupt.h>
	11	#include <linux/irq.h>
15e27b10	12	#include <linux/irqdomain.h>
b4ecd326 RV	13	#include <linux/slab.h>
b4ecd326 RV	14	#include <linux/i2c.h>
a435ae1d	15	#include <linux/of.h>
b4ecd326	16	#include <linux/mfd/core.h>
c6eda6c5	17	#include <linux/mfd/tc3589x.h>
b4ecd326	18
e64c1eb4 LW	19	/**
	20	* enum tc3589x_version - indicates the TC3589x version
	21	*/
	22	enum tc3589x_version {
	23	TC3589X_TC35890,
	24	TC3589X_TC35892,
	25	TC3589X_TC35893,
	26	TC3589X_TC35894,
	27	TC3589X_TC35895,
	28	TC3589X_TC35896,
	29	TC3589X_UNKNOWN,
	30	};
	31
593e9d70 SI	32	#define TC3589x_CLKMODE_MODCTL_SLEEP 0x0
	33	#define TC3589x_CLKMODE_MODCTL_OPERATION (1 << 0)
	34
b4ecd326	35	/**
20406ebf SI	36	* tc3589x_reg_read() - read a single TC3589x register
20406ebf SI	37	* @tc3589x: Device to read from
b4ecd326 RV	38	* @reg: Register to read
b4ecd326 RV	39	*/
20406ebf	40	int tc3589x_reg_read(struct tc3589x *tc3589x, u8 reg)
b4ecd326 RV	41	{
	42	int ret;
	43
20406ebf	44	ret = i2c_smbus_read_byte_data(tc3589x->i2c, reg);
b4ecd326	45	if (ret < 0)
20406ebf	46	dev_err(tc3589x->dev, "failed to read reg %#x: %d\n",
b4ecd326 RV	47	reg, ret);
	48
	49	return ret;
	50	}
20406ebf	51	EXPORT_SYMBOL_GPL(tc3589x_reg_read);
b4ecd326 RV	52
b4ecd326 RV	53	/**
20406ebf SI	54	* tc3589x_reg_read() - write a single TC3589x register
20406ebf SI	55	* @tc3589x: Device to write to
b4ecd326 RV	56	* @reg: Register to read
	57	* @data: Value to write
	58	*/
20406ebf	59	int tc3589x_reg_write(struct tc3589x *tc3589x, u8 reg, u8 data)
b4ecd326 RV	60	{
	61	int ret;
	62
20406ebf	63	ret = i2c_smbus_write_byte_data(tc3589x->i2c, reg, data);
b4ecd326	64	if (ret < 0)
20406ebf	65	dev_err(tc3589x->dev, "failed to write reg %#x: %d\n",
b4ecd326 RV	66	reg, ret);
	67
	68	return ret;
	69	}
20406ebf	70	EXPORT_SYMBOL_GPL(tc3589x_reg_write);
b4ecd326 RV	71
b4ecd326 RV	72	/**
20406ebf SI	73	* tc3589x_block_read() - read multiple TC3589x registers
20406ebf SI	74	* @tc3589x: Device to read from
b4ecd326 RV	75	* @reg: First register
	76	* @length: Number of registers
	77	* @values: Buffer to write to
	78	*/
20406ebf	79	int tc3589x_block_read(struct tc3589x tc3589x, u8 reg, u8 length, u8 values)
b4ecd326 RV	80	{
	81	int ret;
	82
20406ebf	83	ret = i2c_smbus_read_i2c_block_data(tc3589x->i2c, reg, length, values);
b4ecd326	84	if (ret < 0)
20406ebf	85	dev_err(tc3589x->dev, "failed to read regs %#x: %d\n",
b4ecd326 RV	86	reg, ret);
	87
	88	return ret;
	89	}
20406ebf	90	EXPORT_SYMBOL_GPL(tc3589x_block_read);
b4ecd326 RV	91
b4ecd326 RV	92	/**
20406ebf SI	93	* tc3589x_block_write() - write multiple TC3589x registers
20406ebf SI	94	* @tc3589x: Device to write to
b4ecd326 RV	95	* @reg: First register
	96	* @length: Number of registers
	97	* @values: Values to write
	98	*/
20406ebf	99	int tc3589x_block_write(struct tc3589x *tc3589x, u8 reg, u8 length,
b4ecd326 RV	100	const u8 *values)
	101	{
	102	int ret;
	103
20406ebf	104	ret = i2c_smbus_write_i2c_block_data(tc3589x->i2c, reg, length,
b4ecd326 RV	105	values);
b4ecd326 RV	106	if (ret < 0)
20406ebf	107	dev_err(tc3589x->dev, "failed to write regs %#x: %d\n",
b4ecd326 RV	108	reg, ret);
	109
	110	return ret;
	111	}
20406ebf	112	EXPORT_SYMBOL_GPL(tc3589x_block_write);
b4ecd326 RV	113
b4ecd326 RV	114	/**
20406ebf SI	115	* tc3589x_set_bits() - set the value of a bitfield in a TC3589x register
20406ebf SI	116	* @tc3589x: Device to write to
b4ecd326 RV	117	* @reg: Register to write
	118	* @mask: Mask of bits to set
	119	* @values: Value to set
	120	*/
20406ebf	121	int tc3589x_set_bits(struct tc3589x *tc3589x, u8 reg, u8 mask, u8 val)
b4ecd326 RV	122	{
	123	int ret;
	124
20406ebf	125	mutex_lock(&tc3589x->lock);
b4ecd326	126
20406ebf	127	ret = tc3589x_reg_read(tc3589x, reg);
b4ecd326 RV	128	if (ret < 0)
	129	goto out;
	130
	131	ret &= ~mask;
	132	ret \|= val;
	133
20406ebf	134	ret = tc3589x_reg_write(tc3589x, reg, ret);
b4ecd326 RV	135
b4ecd326 RV	136	out:
20406ebf	137	mutex_unlock(&tc3589x->lock);
b4ecd326 RV	138	return ret;
b4ecd326 RV	139	}
20406ebf	140	EXPORT_SYMBOL_GPL(tc3589x_set_bits);
b4ecd326 RV	141
	142	static struct resource gpio_resources[] = {
	143	{
20406ebf SI	144	.start = TC3589x_INT_GPIIRQ,
20406ebf SI	145	.end = TC3589x_INT_GPIIRQ,
b4ecd326 RV	146	.flags = IORESOURCE_IRQ,
	147	},
	148	};
	149
09c730a4 SI	150	static struct resource keypad_resources[] = {
	151	{
	152	.start = TC3589x_INT_KBDIRQ,
	153	.end = TC3589x_INT_KBDIRQ,
	154	.flags = IORESOURCE_IRQ,
	155	},
	156	};
	157
611b7590	158	static struct mfd_cell tc3589x_dev_gpio[] = {
b4ecd326	159	{
20406ebf	160	.name = "tc3589x-gpio",
b4ecd326 RV	161	.num_resources = ARRAY_SIZE(gpio_resources),
b4ecd326 RV	162	.resources = &gpio_resources[0],
a435ae1d	163	.of_compatible = "tc3589x-gpio",
b4ecd326 RV	164	},
	165	};
	166
09c730a4 SI	167	static struct mfd_cell tc3589x_dev_keypad[] = {
	168	{
	169	.name = "tc3589x-keypad",
	170	.num_resources = ARRAY_SIZE(keypad_resources),
	171	.resources = &keypad_resources[0],
a435ae1d	172	.of_compatible = "tc3589x-keypad",
09c730a4 SI	173	},
	174	};
	175
20406ebf	176	static irqreturn_t tc3589x_irq(int irq, void *data)
b4ecd326	177	{
20406ebf	178	struct tc3589x *tc3589x = data;
b4ecd326 RV	179	int status;
b4ecd326 RV	180
bd77efd0	181	again:
20406ebf	182	status = tc3589x_reg_read(tc3589x, TC3589x_IRQST);
b4ecd326 RV	183	if (status < 0)
	184	return IRQ_NONE;
	185
	186	while (status) {
	187	int bit = __ffs(status);
15e27b10	188	int virq = irq_create_mapping(tc3589x->domain, bit);
b4ecd326	189
15e27b10	190	handle_nested_irq(virq);
b4ecd326 RV	191	status &= ~(1 << bit);
	192	}
	193
	194	/*
	195	* A dummy read or write (to any register) appears to be necessary to
	196	* have the last interrupt clear (for example, GPIO IC write) take
bd77efd0 SI	197	* effect. In such a case, recheck for any interrupt which is still
bd77efd0 SI	198	* pending.
b4ecd326	199	*/
bd77efd0 SI	200	status = tc3589x_reg_read(tc3589x, TC3589x_IRQST);
	201	if (status)
	202	goto again;
b4ecd326 RV	203
	204	return IRQ_HANDLED;
	205	}
	206
15e27b10 LJ	207	static int tc3589x_irq_map(struct irq_domain *d, unsigned int virq,
15e27b10 LJ	208	irq_hw_number_t hwirq)
b4ecd326	209	{
15e27b10	210	struct tc3589x *tc3589x = d->host_data;
b4ecd326	211
15e27b10 LJ	212	irq_set_chip_data(virq, tc3589x);
	213	irq_set_chip_and_handler(virq, &dummy_irq_chip,
	214	handle_edge_irq);
	215	irq_set_nested_thread(virq, 1);
b4ecd326	216	#ifdef CONFIG_ARM
15e27b10	217	set_irq_flags(virq, IRQF_VALID);
b4ecd326	218	#else
15e27b10	219	irq_set_noprobe(virq);
b4ecd326	220	#endif
b4ecd326 RV	221
	222	return 0;
	223	}
	224
15e27b10	225	static void tc3589x_irq_unmap(struct irq_domain *d, unsigned int virq)
b4ecd326	226	{
b4ecd326	227	#ifdef CONFIG_ARM
15e27b10	228	set_irq_flags(virq, 0);
b4ecd326	229	#endif
15e27b10 LJ	230	irq_set_chip_and_handler(virq, NULL, NULL);
	231	irq_set_chip_data(virq, NULL);
	232	}
	233
	234	static struct irq_domain_ops tc3589x_irq_ops = {
1f0529b4	235	.map = tc3589x_irq_map,
15e27b10	236	.unmap = tc3589x_irq_unmap,
1f0529b4	237	.xlate = irq_domain_xlate_twocell,
15e27b10 LJ	238	};
15e27b10 LJ	239
a435ae1d	240	static int tc3589x_irq_init(struct tc3589x tc3589x, struct device_node np)
15e27b10 LJ	241	{
	242	int base = tc3589x->irq_base;
	243
1f0529b4 LW	244	tc3589x->domain = irq_domain_add_simple(
	245	np, TC3589x_NR_INTERNAL_IRQS, base,
	246	&tc3589x_irq_ops, tc3589x);
15e27b10 LJ	247
	248	if (!tc3589x->domain) {
	249	dev_err(tc3589x->dev, "Failed to create irqdomain\n");
	250	return -ENOSYS;
	251	}
	252
	253	return 0;
b4ecd326 RV	254	}
b4ecd326 RV	255
20406ebf	256	static int tc3589x_chip_init(struct tc3589x *tc3589x)
b4ecd326 RV	257	{
	258	int manf, ver, ret;
	259
20406ebf	260	manf = tc3589x_reg_read(tc3589x, TC3589x_MANFCODE);
b4ecd326 RV	261	if (manf < 0)
	262	return manf;
	263
20406ebf	264	ver = tc3589x_reg_read(tc3589x, TC3589x_VERSION);
b4ecd326 RV	265	if (ver < 0)
	266	return ver;
	267
20406ebf SI	268	if (manf != TC3589x_MANFCODE_MAGIC) {
20406ebf SI	269	dev_err(tc3589x->dev, "unknown manufacturer: %#x\n", manf);
b4ecd326 RV	270	return -EINVAL;
	271	}
	272
20406ebf	273	dev_info(tc3589x->dev, "manufacturer: %#x, version: %#x\n", manf, ver);
b4ecd326	274
523bc382 SI	275	/*
	276	* Put everything except the IRQ module into reset;
	277	* also spare the GPIO module for any pin initialization
	278	* done during pre-kernel boot
	279	*/
20406ebf SI	280	ret = tc3589x_reg_write(tc3589x, TC3589x_RSTCTRL,
	281	TC3589x_RSTCTRL_TIMRST
	282	\| TC3589x_RSTCTRL_ROTRST
523bc382	283	\| TC3589x_RSTCTRL_KBDRST);
b4ecd326 RV	284	if (ret < 0)
	285	return ret;
	286
	287	/* Clear the reset interrupt. */
20406ebf	288	return tc3589x_reg_write(tc3589x, TC3589x_RSTINTCLR, 0x1);
b4ecd326 RV	289	}
b4ecd326 RV	290
f791be49	291	static int tc3589x_device_init(struct tc3589x *tc3589x)
611b7590 SI	292	{
	293	int ret = 0;
	294	unsigned int blocks = tc3589x->pdata->block;
	295
	296	if (blocks & TC3589x_BLOCK_GPIO) {
	297	ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_gpio,
55692af5	298	ARRAY_SIZE(tc3589x_dev_gpio), NULL,
15e27b10	299	tc3589x->irq_base, tc3589x->domain);
611b7590 SI	300	if (ret) {
	301	dev_err(tc3589x->dev, "failed to add gpio child\n");
	302	return ret;
	303	}
	304	dev_info(tc3589x->dev, "added gpio block\n");
	305	}
	306
09c730a4 SI	307	if (blocks & TC3589x_BLOCK_KEYPAD) {
09c730a4 SI	308	ret = mfd_add_devices(tc3589x->dev, -1, tc3589x_dev_keypad,
55692af5	309	ARRAY_SIZE(tc3589x_dev_keypad), NULL,
15e27b10	310	tc3589x->irq_base, tc3589x->domain);
09c730a4 SI	311	if (ret) {
	312	dev_err(tc3589x->dev, "failed to keypad child\n");
	313	return ret;
	314	}
	315	dev_info(tc3589x->dev, "added keypad block\n");
	316	}
611b7590	317
09c730a4	318	return ret;
611b7590 SI	319	}
611b7590 SI	320
a435ae1d LJ	321	static int tc3589x_of_probe(struct device_node *np,
	322	struct tc3589x_platform_data *pdata)
	323	{
	324	struct device_node *child;
	325
	326	for_each_child_of_node(np, child) {
	327	if (!strcmp(child->name, "tc3589x_gpio")) {
	328	pdata->block \|= TC3589x_BLOCK_GPIO;
	329	}
	330	if (!strcmp(child->name, "tc3589x_keypad")) {
	331	pdata->block \|= TC3589x_BLOCK_KEYPAD;
	332	}
	333	}
	334
	335	return 0;
	336	}
	337
f791be49	338	static int tc3589x_probe(struct i2c_client *i2c,
b4ecd326 RV	339	const struct i2c_device_id *id)
b4ecd326 RV	340	{
334a41ce	341	struct tc3589x_platform_data *pdata = dev_get_platdata(&i2c->dev);
a435ae1d	342	struct device_node *np = i2c->dev.of_node;
20406ebf	343	struct tc3589x *tc3589x;
b4ecd326 RV	344	int ret;
b4ecd326 RV	345
a435ae1d LJ	346	if (!pdata) {
	347	if (np) {
	348	pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
	349	if (!pdata)
	350	return -ENOMEM;
	351
	352	ret = tc3589x_of_probe(np, pdata);
	353	if (ret)
	354	return ret;
	355	}
	356	else {
	357	dev_err(&i2c->dev, "No platform data or DT found\n");
	358	return -EINVAL;
	359	}
	360	}
	361
b4ecd326 RV	362	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA
	363	\| I2C_FUNC_SMBUS_I2C_BLOCK))
	364	return -EIO;
	365
1383e00f JH	366	tc3589x = devm_kzalloc(&i2c->dev, sizeof(struct tc3589x),
1383e00f JH	367	GFP_KERNEL);
20406ebf	368	if (!tc3589x)
b4ecd326 RV	369	return -ENOMEM;
b4ecd326 RV	370
20406ebf	371	mutex_init(&tc3589x->lock);
b4ecd326	372
20406ebf SI	373	tc3589x->dev = &i2c->dev;
	374	tc3589x->i2c = i2c;
	375	tc3589x->pdata = pdata;
	376	tc3589x->irq_base = pdata->irq_base;
e64c1eb4 LW	377
	378	switch (id->driver_data) {
	379	case TC3589X_TC35893:
	380	case TC3589X_TC35895:
	381	case TC3589X_TC35896:
	382	tc3589x->num_gpio = 20;
	383	break;
	384	case TC3589X_TC35890:
	385	case TC3589X_TC35892:
	386	case TC3589X_TC35894:
	387	case TC3589X_UNKNOWN:
	388	default:
	389	tc3589x->num_gpio = 24;
	390	break;
	391	}
b4ecd326	392
20406ebf	393	i2c_set_clientdata(i2c, tc3589x);
b4ecd326	394
20406ebf	395	ret = tc3589x_chip_init(tc3589x);
b4ecd326	396	if (ret)
1383e00f	397	return ret;
b4ecd326	398
a435ae1d	399	ret = tc3589x_irq_init(tc3589x, np);
b4ecd326	400	if (ret)
1383e00f	401	return ret;
b4ecd326	402
20406ebf	403	ret = request_threaded_irq(tc3589x->i2c->irq, NULL, tc3589x_irq,
b4ecd326	404	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
20406ebf	405	"tc3589x", tc3589x);
b4ecd326	406	if (ret) {
20406ebf	407	dev_err(tc3589x->dev, "failed to request IRQ: %d\n", ret);
1383e00f	408	return ret;
b4ecd326 RV	409	}
b4ecd326 RV	410
611b7590	411	ret = tc3589x_device_init(tc3589x);
b4ecd326	412	if (ret) {
611b7590	413	dev_err(tc3589x->dev, "failed to add child devices\n");
1383e00f	414	return ret;
b4ecd326 RV	415	}
	416
	417	return 0;
b4ecd326 RV	418	}
b4ecd326 RV	419
4740f73f	420	static int tc3589x_remove(struct i2c_client *client)
b4ecd326	421	{
20406ebf	422	struct tc3589x *tc3589x = i2c_get_clientdata(client);
b4ecd326	423
20406ebf	424	mfd_remove_devices(tc3589x->dev);
b4ecd326	425
b4ecd326 RV	426	return 0;
	427	}
	428
930bf022	429	#ifdef CONFIG_PM_SLEEP
593e9d70 SI	430	static int tc3589x_suspend(struct device *dev)
	431	{
	432	struct tc3589x *tc3589x = dev_get_drvdata(dev);
	433	struct i2c_client *client = tc3589x->i2c;
	434	int ret = 0;
	435
	436	/* put the system to sleep mode */
	437	if (!device_may_wakeup(&client->dev))
	438	ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
	439	TC3589x_CLKMODE_MODCTL_SLEEP);
	440
	441	return ret;
	442	}
	443
	444	static int tc3589x_resume(struct device *dev)
	445	{
	446	struct tc3589x *tc3589x = dev_get_drvdata(dev);
	447	struct i2c_client *client = tc3589x->i2c;
	448	int ret = 0;
	449
	450	/* enable the system into operation */
	451	if (!device_may_wakeup(&client->dev))
	452	ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
	453	TC3589x_CLKMODE_MODCTL_OPERATION);
	454
	455	return ret;
	456	}
54d8e2c3	457	#endif
593e9d70	458
930bf022 AL	459	static SIMPLE_DEV_PM_OPS(tc3589x_dev_pm_ops, tc3589x_suspend, tc3589x_resume);
930bf022 AL	460
20406ebf	461	static const struct i2c_device_id tc3589x_id[] = {
e64c1eb4 LW	462	{ "tc35890", TC3589X_TC35890 },
	463	{ "tc35892", TC3589X_TC35892 },
	464	{ "tc35893", TC3589X_TC35893 },
	465	{ "tc35894", TC3589X_TC35894 },
	466	{ "tc35895", TC3589X_TC35895 },
	467	{ "tc35896", TC3589X_TC35896 },
	468	{ "tc3589x", TC3589X_UNKNOWN },
b4ecd326 RV	469	{ }
b4ecd326 RV	470	};
20406ebf	471	MODULE_DEVICE_TABLE(i2c, tc3589x_id);
b4ecd326	472
20406ebf SI	473	static struct i2c_driver tc3589x_driver = {
20406ebf SI	474	.driver.name = "tc3589x",
b4ecd326	475	.driver.owner = THIS_MODULE,
593e9d70	476	.driver.pm = &tc3589x_dev_pm_ops,
20406ebf	477	.probe = tc3589x_probe,
84449216	478	.remove = tc3589x_remove,
20406ebf	479	.id_table = tc3589x_id,
b4ecd326 RV	480	};
b4ecd326 RV	481
20406ebf	482	static int __init tc3589x_init(void)
b4ecd326	483	{
20406ebf	484	return i2c_add_driver(&tc3589x_driver);
b4ecd326	485	}
20406ebf	486	subsys_initcall(tc3589x_init);
b4ecd326	487
20406ebf	488	static void __exit tc3589x_exit(void)
b4ecd326	489	{
20406ebf	490	i2c_del_driver(&tc3589x_driver);
b4ecd326	491	}
20406ebf	492	module_exit(tc3589x_exit);
b4ecd326 RV	493
b4ecd326 RV	494	MODULE_LICENSE("GPL v2");
20406ebf	495	MODULE_DESCRIPTION("TC3589x MFD core driver");
b4ecd326	496	MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent");