[mirror_ubuntu-bionic-kernel.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>

#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;

	if (base) {
		tc3589x->domain = irq_domain_add_legacy(
			NULL, TC3589x_NR_INTERNAL_IRQS, base,
			0, &tc3589x_irq_ops, tc3589x);
	}
	else {
		tc3589x->domain = irq_domain_add_linear(
			np, TC3589x_NR_INTERNAL_IRQS,
			&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 = i2c->dev.platform_data;
	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 = kzalloc(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;
	tc3589x->num_gpio = id->driver_data;

	i2c_set_clientdata(i2c, tc3589x);

	ret = tc3589x_chip_init(tc3589x);
	if (ret)
		goto out_free;

	ret = tc3589x_irq_init(tc3589x, np);
	if (ret)
		goto out_free;

	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);
		goto out_free;
	}

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

	return 0;

out_freeirq:
	free_irq(tc3589x->i2c->irq, tc3589x);
out_free:
	kfree(tc3589x);
	return ret;
}

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

	mfd_remove_devices(tc3589x->dev);

	free_irq(tc3589x->i2c->irq, tc3589x);

	kfree(tc3589x);

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