drivers/i2c/busses/i2c-digicolor.c - arm/linux - Git at Google

 /*
  * I2C bus driver for Conexant Digicolor SoCs
  *
  * Author: Baruch Siach <baruch@tkos.co.il>
  *
  * Copyright (C) 2015 Paradox Innovation Ltd.
  *
  * 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/clk.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>

 #define DEFAULT_FREQ		100000
 #define TIMEOUT_MS		100

 #define II_CONTROL		0x0
 #define II_CONTROL_LOCAL_RESET	BIT(0)

 #define II_CLOCKTIME		0x1

 #define II_COMMAND		0x2
 #define II_CMD_START		1
 #define II_CMD_RESTART		2
 #define II_CMD_SEND_ACK		3
 #define II_CMD_GET_ACK		6
 #define II_CMD_GET_NOACK	7
 #define II_CMD_STOP		10
 #define II_COMMAND_GO		BIT(7)
 #define II_COMMAND_COMPLETION_STATUS(r)	(((r) >> 5) & 3)
 #define II_CMD_STATUS_NORMAL	0
 #define II_CMD_STATUS_ACK_GOOD	1
 #define II_CMD_STATUS_ACK_BAD	2
 #define II_CMD_STATUS_ABORT	3

 #define II_DATA			0x3
 #define II_INTFLAG_CLEAR	0x8
 #define II_INTENABLE		0xa

 struct dc_i2c {
 	struct i2c_adapter	adap;
 	struct device		*dev;
 	void __iomem		*regs;
 	struct clk		*clk;
 	unsigned int		frequency;

 	struct i2c_msg		*msg;
 	unsigned int		msgbuf_ptr;
 	int			last;
 	spinlock_t		lock;
 	struct completion	done;
 	int			state;
 	int			error;
 };

 enum {
 	STATE_IDLE,
 	STATE_START,
 	STATE_ADDR,
 	STATE_WRITE,
 	STATE_READ,
 	STATE_STOP,
 };

 static void dc_i2c_cmd(struct dc_i2c *i2c, u8 cmd)
 {
 	writeb_relaxed(cmd | II_COMMAND_GO, i2c->regs + II_COMMAND);
 }

 static u8 dc_i2c_addr_cmd(struct i2c_msg *msg)
 {
 	u8 addr = (msg->addr & 0x7f) << 1;

 	if (msg->flags & I2C_M_RD)
 		addr |= 1;

 	return addr;
 }

 static void dc_i2c_data(struct dc_i2c *i2c, u8 data)
 {
 	writeb_relaxed(data, i2c->regs + II_DATA);
 }

 static void dc_i2c_write_byte(struct dc_i2c *i2c, u8 byte)
 {
 	dc_i2c_data(i2c, byte);
 	dc_i2c_cmd(i2c, II_CMD_SEND_ACK);
 }

 static void dc_i2c_write_buf(struct dc_i2c *i2c)
 {
 	dc_i2c_write_byte(i2c, i2c->msg->buf[i2c->msgbuf_ptr++]);
 }

 static void dc_i2c_next_read(struct dc_i2c *i2c)
 {
 	bool last = (i2c->msgbuf_ptr + 1 == i2c->msg->len);

 	dc_i2c_cmd(i2c, last ? II_CMD_GET_NOACK : II_CMD_GET_ACK);
 }

 static void dc_i2c_stop(struct dc_i2c *i2c)
 {
 	i2c->state = STATE_STOP;
 	if (i2c->last)
 		dc_i2c_cmd(i2c, II_CMD_STOP);
 	else
 		complete(&i2c->done);
 }

 static u8 dc_i2c_read_byte(struct dc_i2c *i2c)
 {
 	return readb_relaxed(i2c->regs + II_DATA);
 }

 static void dc_i2c_read_buf(struct dc_i2c *i2c)
 {
 	i2c->msg->buf[i2c->msgbuf_ptr++] = dc_i2c_read_byte(i2c);
 	dc_i2c_next_read(i2c);
 }

 static void dc_i2c_set_irq(struct dc_i2c *i2c, int enable)
 {
 	if (enable)
 		writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);
 	writeb_relaxed(!!enable, i2c->regs + II_INTENABLE);
 }

 static int dc_i2c_cmd_status(struct dc_i2c *i2c)
 {
 	u8 cmd = readb_relaxed(i2c->regs + II_COMMAND);

 	return II_COMMAND_COMPLETION_STATUS(cmd);
 }

 static void dc_i2c_start_msg(struct dc_i2c *i2c, int first)
 {
 	struct i2c_msg *msg = i2c->msg;

 	if (!(msg->flags & I2C_M_NOSTART)) {
 		i2c->state = STATE_START;
 		dc_i2c_cmd(i2c, first ? II_CMD_START : II_CMD_RESTART);
 	} else if (msg->flags & I2C_M_RD) {
 		i2c->state = STATE_READ;
 		dc_i2c_next_read(i2c);
 	} else {
 		i2c->state = STATE_WRITE;
 		dc_i2c_write_buf(i2c);
 	}
 }

 static irqreturn_t dc_i2c_irq(int irq, void *dev_id)
 {
 	struct dc_i2c *i2c = dev_id;
 	int cmd_status = dc_i2c_cmd_status(i2c);
 	unsigned long flags;
 	u8 addr_cmd;

 	writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);

 	spin_lock_irqsave(&i2c->lock, flags);

 	if (cmd_status == II_CMD_STATUS_ACK_BAD
 	    || cmd_status == II_CMD_STATUS_ABORT) {
 		i2c->error = -EIO;
 		complete(&i2c->done);
 		goto out;
 	}

 	switch (i2c->state) {
 	case STATE_START:
 		addr_cmd = dc_i2c_addr_cmd(i2c->msg);
 		dc_i2c_write_byte(i2c, addr_cmd);
 		i2c->state = STATE_ADDR;
 		break;
 	case STATE_ADDR:
 		if (i2c->msg->flags & I2C_M_RD) {
 			dc_i2c_next_read(i2c);
 			i2c->state = STATE_READ;
 			break;
 		}
 		i2c->state = STATE_WRITE;
 		/* fall through */
 	case STATE_WRITE:
 		if (i2c->msgbuf_ptr < i2c->msg->len)
 			dc_i2c_write_buf(i2c);
 		else
 			dc_i2c_stop(i2c);
 		break;
 	case STATE_READ:
 		if (i2c->msgbuf_ptr < i2c->msg->len)
 			dc_i2c_read_buf(i2c);
 		else
 			dc_i2c_stop(i2c);
 		break;
 	case STATE_STOP:
 		i2c->state = STATE_IDLE;
 		complete(&i2c->done);
 		break;
 	}

 out:
 	spin_unlock_irqrestore(&i2c->lock, flags);
 	return IRQ_HANDLED;
 }

 static int dc_i2c_xfer_msg(struct dc_i2c *i2c, struct i2c_msg *msg, int first,
 			   int last)
 {
 	unsigned long timeout = msecs_to_jiffies(TIMEOUT_MS);
 	unsigned long flags;

 	spin_lock_irqsave(&i2c->lock, flags);
 	i2c->msg = msg;
 	i2c->msgbuf_ptr = 0;
 	i2c->last = last;
 	i2c->error = 0;

 	reinit_completion(&i2c->done);
 	dc_i2c_set_irq(i2c, 1);
 	dc_i2c_start_msg(i2c, first);
 	spin_unlock_irqrestore(&i2c->lock, flags);

 	timeout = wait_for_completion_timeout(&i2c->done, timeout);
 	dc_i2c_set_irq(i2c, 0);
 	if (timeout == 0) {
 		i2c->state = STATE_IDLE;
 		return -ETIMEDOUT;
 	}

 	if (i2c->error)
 		return i2c->error;

 	return 0;
 }

 static int dc_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 {
 	struct dc_i2c *i2c = adap->algo_data;
 	int i, ret;

 	for (i = 0; i < num; i++) {
 		ret = dc_i2c_xfer_msg(i2c, &msgs[i], i == 0, i == num - 1);
 		if (ret)
 			return ret;
 	}

 	return num;
 }

 static int dc_i2c_init_hw(struct dc_i2c *i2c)
 {
 	unsigned long clk_rate = clk_get_rate(i2c->clk);
 	unsigned int clocktime;

 	writeb_relaxed(II_CONTROL_LOCAL_RESET, i2c->regs + II_CONTROL);
 	udelay(100);
 	writeb_relaxed(0, i2c->regs + II_CONTROL);
 	udelay(100);

 	clocktime = DIV_ROUND_UP(clk_rate, 64 * i2c->frequency);
 	if (clocktime < 1 || clocktime > 0xff) {
 		dev_err(i2c->dev, "can't set bus speed of %u Hz\n",
 			i2c->frequency);
 		return -EINVAL;
 	}
 	writeb_relaxed(clocktime - 1, i2c->regs + II_CLOCKTIME);

 	return 0;
 }

 static u32 dc_i2c_func(struct i2c_adapter *adap)
 {
 	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_NOSTART;
 }

 static const struct i2c_algorithm dc_i2c_algorithm = {
 	.master_xfer	= dc_i2c_xfer,
 	.functionality	= dc_i2c_func,
 };

 static int dc_i2c_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct dc_i2c *i2c;
 	struct resource *r;
 	int ret = 0, irq;

 	i2c = devm_kzalloc(&pdev->dev, sizeof(struct dc_i2c), GFP_KERNEL);
 	if (!i2c)
 		return -ENOMEM;

 	if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
 				 &i2c->frequency))
 		i2c->frequency = DEFAULT_FREQ;

 	i2c->dev = &pdev->dev;
 	platform_set_drvdata(pdev, i2c);

 	spin_lock_init(&i2c->lock);
 	init_completion(&i2c->done);

 	i2c->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(i2c->clk))
 		return PTR_ERR(i2c->clk);

 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	i2c->regs = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(i2c->regs))
 		return PTR_ERR(i2c->regs);

 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;

 	ret = devm_request_irq(&pdev->dev, irq, dc_i2c_irq, 0,
 			       dev_name(&pdev->dev), i2c);
 	if (ret < 0)
 		return ret;

 	strlcpy(i2c->adap.name, "Conexant Digicolor I2C adapter",
 		sizeof(i2c->adap.name));
 	i2c->adap.owner = THIS_MODULE;
 	i2c->adap.algo = &dc_i2c_algorithm;
 	i2c->adap.dev.parent = &pdev->dev;
 	i2c->adap.dev.of_node = np;
 	i2c->adap.algo_data = i2c;

 	ret = dc_i2c_init_hw(i2c);
 	if (ret)
 		return ret;

 	ret = clk_prepare_enable(i2c->clk);
 	if (ret < 0)
 		return ret;

 	ret = i2c_add_adapter(&i2c->adap);
 	if (ret < 0) {
 		clk_unprepare(i2c->clk);
 		return ret;
 	}

 	return 0;
 }

 static int dc_i2c_remove(struct platform_device *pdev)
 {
 	struct dc_i2c *i2c = platform_get_drvdata(pdev);

 	i2c_del_adapter(&i2c->adap);
 	clk_disable_unprepare(i2c->clk);

 	return 0;
 }

 static const struct of_device_id dc_i2c_match[] = {
 	{ .compatible = "cnxt,cx92755-i2c" },
 	{ },
 };

 static struct platform_driver dc_i2c_driver = {
 	.probe   = dc_i2c_probe,
 	.remove  = dc_i2c_remove,
 	.driver  = {
 		.name  = "digicolor-i2c",
 		.of_match_table = dc_i2c_match,
 	},
 };
 module_platform_driver(dc_i2c_driver);

 MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
 MODULE_DESCRIPTION("Conexant Digicolor I2C master driver");
 MODULE_LICENSE("GPL v2");
	/*
	* I2C bus driver for Conexant Digicolor SoCs
	*
	* Author: Baruch Siach <baruch@tkos.co.il>
	*
	* Copyright (C) 2015 Paradox Innovation Ltd.
	*
	* 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/clk.h>
	#include <linux/completion.h>
	#include <linux/delay.h>
	#include <linux/i2c.h>
	#include <linux/interrupt.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/platform_device.h>

	#define DEFAULT_FREQ 100000
	#define TIMEOUT_MS 100

	#define II_CONTROL 0x0
	#define II_CONTROL_LOCAL_RESET BIT(0)

	#define II_CLOCKTIME 0x1

	#define II_COMMAND 0x2
	#define II_CMD_START 1
	#define II_CMD_RESTART 2
	#define II_CMD_SEND_ACK 3
	#define II_CMD_GET_ACK 6
	#define II_CMD_GET_NOACK 7
	#define II_CMD_STOP 10
	#define II_COMMAND_GO BIT(7)
	#define II_COMMAND_COMPLETION_STATUS(r) (((r) >> 5) & 3)
	#define II_CMD_STATUS_NORMAL 0
	#define II_CMD_STATUS_ACK_GOOD 1
	#define II_CMD_STATUS_ACK_BAD 2
	#define II_CMD_STATUS_ABORT 3

	#define II_DATA 0x3
	#define II_INTFLAG_CLEAR 0x8
	#define II_INTENABLE 0xa

	struct dc_i2c {
	struct i2c_adapter adap;
	struct device *dev;
	void __iomem *regs;
	struct clk *clk;
	unsigned int frequency;

	struct i2c_msg *msg;
	unsigned int msgbuf_ptr;
	int last;
	spinlock_t lock;
	struct completion done;
	int state;
	int error;
	};

	enum {
	STATE_IDLE,
	STATE_START,
	STATE_ADDR,
	STATE_WRITE,
	STATE_READ,
	STATE_STOP,
	};

	static void dc_i2c_cmd(struct dc_i2c *i2c, u8 cmd)
	{
	writeb_relaxed(cmd \| II_COMMAND_GO, i2c->regs + II_COMMAND);
	}

	static u8 dc_i2c_addr_cmd(struct i2c_msg *msg)
	{
	u8 addr = (msg->addr & 0x7f) << 1;

	if (msg->flags & I2C_M_RD)
	addr \|= 1;

	return addr;
	}

	static void dc_i2c_data(struct dc_i2c *i2c, u8 data)
	{
	writeb_relaxed(data, i2c->regs + II_DATA);
	}

	static void dc_i2c_write_byte(struct dc_i2c *i2c, u8 byte)
	{
	dc_i2c_data(i2c, byte);
	dc_i2c_cmd(i2c, II_CMD_SEND_ACK);
	}

	static void dc_i2c_write_buf(struct dc_i2c *i2c)
	{
	dc_i2c_write_byte(i2c, i2c->msg->buf[i2c->msgbuf_ptr++]);
	}

	static void dc_i2c_next_read(struct dc_i2c *i2c)
	{
	bool last = (i2c->msgbuf_ptr + 1 == i2c->msg->len);

	dc_i2c_cmd(i2c, last ? II_CMD_GET_NOACK : II_CMD_GET_ACK);
	}

	static void dc_i2c_stop(struct dc_i2c *i2c)
	{
	i2c->state = STATE_STOP;
	if (i2c->last)
	dc_i2c_cmd(i2c, II_CMD_STOP);
	else
	complete(&i2c->done);
	}

	static u8 dc_i2c_read_byte(struct dc_i2c *i2c)
	{
	return readb_relaxed(i2c->regs + II_DATA);
	}

	static void dc_i2c_read_buf(struct dc_i2c *i2c)
	{
	i2c->msg->buf[i2c->msgbuf_ptr++] = dc_i2c_read_byte(i2c);
	dc_i2c_next_read(i2c);
	}

	static void dc_i2c_set_irq(struct dc_i2c *i2c, int enable)
	{
	if (enable)
	writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);
	writeb_relaxed(!!enable, i2c->regs + II_INTENABLE);
	}

	static int dc_i2c_cmd_status(struct dc_i2c *i2c)
	{
	u8 cmd = readb_relaxed(i2c->regs + II_COMMAND);

	return II_COMMAND_COMPLETION_STATUS(cmd);
	}

	static void dc_i2c_start_msg(struct dc_i2c *i2c, int first)
	{
	struct i2c_msg *msg = i2c->msg;

	if (!(msg->flags & I2C_M_NOSTART)) {
	i2c->state = STATE_START;
	dc_i2c_cmd(i2c, first ? II_CMD_START : II_CMD_RESTART);
	} else if (msg->flags & I2C_M_RD) {
	i2c->state = STATE_READ;
	dc_i2c_next_read(i2c);
	} else {
	i2c->state = STATE_WRITE;
	dc_i2c_write_buf(i2c);
	}
	}

	static irqreturn_t dc_i2c_irq(int irq, void *dev_id)
	{
	struct dc_i2c *i2c = dev_id;
	int cmd_status = dc_i2c_cmd_status(i2c);
	unsigned long flags;
	u8 addr_cmd;

	writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);

	spin_lock_irqsave(&i2c->lock, flags);

	if (cmd_status == II_CMD_STATUS_ACK_BAD
	\|\| cmd_status == II_CMD_STATUS_ABORT) {
	i2c->error = -EIO;
	complete(&i2c->done);
	goto out;
	}

	switch (i2c->state) {
	case STATE_START:
	addr_cmd = dc_i2c_addr_cmd(i2c->msg);
	dc_i2c_write_byte(i2c, addr_cmd);
	i2c->state = STATE_ADDR;
	break;
	case STATE_ADDR:
	if (i2c->msg->flags & I2C_M_RD) {
	dc_i2c_next_read(i2c);
	i2c->state = STATE_READ;
	break;
	}
	i2c->state = STATE_WRITE;
	/* fall through */
	case STATE_WRITE:
	if (i2c->msgbuf_ptr < i2c->msg->len)
	dc_i2c_write_buf(i2c);
	else
	dc_i2c_stop(i2c);
	break;
	case STATE_READ:
	if (i2c->msgbuf_ptr < i2c->msg->len)
	dc_i2c_read_buf(i2c);
	else
	dc_i2c_stop(i2c);
	break;
	case STATE_STOP:
	i2c->state = STATE_IDLE;
	complete(&i2c->done);
	break;
	}

	out:
	spin_unlock_irqrestore(&i2c->lock, flags);
	return IRQ_HANDLED;
	}

	static int dc_i2c_xfer_msg(struct dc_i2c i2c, struct i2c_msg msg, int first,
	int last)
	{
	unsigned long timeout = msecs_to_jiffies(TIMEOUT_MS);
	unsigned long flags;

	spin_lock_irqsave(&i2c->lock, flags);
	i2c->msg = msg;
	i2c->msgbuf_ptr = 0;
	i2c->last = last;
	i2c->error = 0;

	reinit_completion(&i2c->done);
	dc_i2c_set_irq(i2c, 1);
	dc_i2c_start_msg(i2c, first);
	spin_unlock_irqrestore(&i2c->lock, flags);

	timeout = wait_for_completion_timeout(&i2c->done, timeout);
	dc_i2c_set_irq(i2c, 0);
	if (timeout == 0) {
	i2c->state = STATE_IDLE;
	return -ETIMEDOUT;
	}

	if (i2c->error)
	return i2c->error;

	return 0;
	}

	static int dc_i2c_xfer(struct i2c_adapter adap, struct i2c_msg msgs, int num)
	{
	struct dc_i2c *i2c = adap->algo_data;
	int i, ret;

	for (i = 0; i < num; i++) {
	ret = dc_i2c_xfer_msg(i2c, &msgs[i], i == 0, i == num - 1);
	if (ret)
	return ret;
	}

	return num;
	}

	static int dc_i2c_init_hw(struct dc_i2c *i2c)
	{
	unsigned long clk_rate = clk_get_rate(i2c->clk);
	unsigned int clocktime;

	writeb_relaxed(II_CONTROL_LOCAL_RESET, i2c->regs + II_CONTROL);
	udelay(100);
	writeb_relaxed(0, i2c->regs + II_CONTROL);
	udelay(100);

	clocktime = DIV_ROUND_UP(clk_rate, 64 * i2c->frequency);
	if (clocktime < 1 \|\| clocktime > 0xff) {
	dev_err(i2c->dev, "can't set bus speed of %u Hz\n",
	i2c->frequency);
	return -EINVAL;
	}
	writeb_relaxed(clocktime - 1, i2c->regs + II_CLOCKTIME);

	return 0;
	}

	static u32 dc_i2c_func(struct i2c_adapter *adap)
	{
	return I2C_FUNC_I2C \| I2C_FUNC_SMBUS_EMUL \| I2C_FUNC_NOSTART;
	}

	static const struct i2c_algorithm dc_i2c_algorithm = {
	.master_xfer = dc_i2c_xfer,
	.functionality = dc_i2c_func,
	};

	static int dc_i2c_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct dc_i2c *i2c;
	struct resource *r;
	int ret = 0, irq;

	i2c = devm_kzalloc(&pdev->dev, sizeof(struct dc_i2c), GFP_KERNEL);
	if (!i2c)
	return -ENOMEM;

	if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
	&i2c->frequency))
	i2c->frequency = DEFAULT_FREQ;

	i2c->dev = &pdev->dev;
	platform_set_drvdata(pdev, i2c);

	spin_lock_init(&i2c->lock);
	init_completion(&i2c->done);

	i2c->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(i2c->clk))
	return PTR_ERR(i2c->clk);

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	i2c->regs = devm_ioremap_resource(&pdev->dev, r);
	if (IS_ERR(i2c->regs))
	return PTR_ERR(i2c->regs);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
	return irq;

	ret = devm_request_irq(&pdev->dev, irq, dc_i2c_irq, 0,
	dev_name(&pdev->dev), i2c);
	if (ret < 0)
	return ret;

	strlcpy(i2c->adap.name, "Conexant Digicolor I2C adapter",
	sizeof(i2c->adap.name));
	i2c->adap.owner = THIS_MODULE;
	i2c->adap.algo = &dc_i2c_algorithm;
	i2c->adap.dev.parent = &pdev->dev;
	i2c->adap.dev.of_node = np;
	i2c->adap.algo_data = i2c;

	ret = dc_i2c_init_hw(i2c);
	if (ret)
	return ret;

	ret = clk_prepare_enable(i2c->clk);
	if (ret < 0)
	return ret;

	ret = i2c_add_adapter(&i2c->adap);
	if (ret < 0) {
	clk_unprepare(i2c->clk);
	return ret;
	}

	return 0;
	}

	static int dc_i2c_remove(struct platform_device *pdev)
	{
	struct dc_i2c *i2c = platform_get_drvdata(pdev);

	i2c_del_adapter(&i2c->adap);
	clk_disable_unprepare(i2c->clk);

	return 0;
	}

	static const struct of_device_id dc_i2c_match[] = {
	{ .compatible = "cnxt,cx92755-i2c" },
	{ },
	};

	static struct platform_driver dc_i2c_driver = {
	.probe = dc_i2c_probe,
	.remove = dc_i2c_remove,
	.driver = {
	.name = "digicolor-i2c",
	.of_match_table = dc_i2c_match,
	},
	};
	module_platform_driver(dc_i2c_driver);

	MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
	MODULE_DESCRIPTION("Conexant Digicolor I2C master driver");
	MODULE_LICENSE("GPL v2");