i2c-imx.c

	strlcpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name));
	i2c_imx->adapter.owner		= THIS_MODULE;
	i2c_imx->adapter.algo		= &i2c_imx_algo;
	i2c_imx->adapter.dev.parent	= &pdev->dev;
	i2c_imx->adapter.nr 		= pdev->id;
	i2c_imx->adapter.dev.of_node	= pdev->dev.of_node;
	i2c_imx->base			= base;

	/* Get I2C clock */
	i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(i2c_imx->clk)) {
		dev_err(&pdev->dev, "can't get I2C clock\n");
		return PTR_ERR(i2c_imx->clk);
	}

	ret = clk_prepare_enable(i2c_imx->clk);
	if (ret) {
		dev_err(&pdev->dev, "can't enable I2C clock\n");
		return ret;
	}
	/* Request IRQ */
	ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0,
				pdev->name, i2c_imx);
	if (ret) {
		dev_err(&pdev->dev, "can't claim irq %d\n", irq);
		goto clk_disable;
	}

	/* Init queue */
	init_waitqueue_head(&i2c_imx->queue);

	/* Set up adapter data */
	i2c_set_adapdata(&i2c_imx->adapter, i2c_imx);

	/* Set up clock divider */
	i2c_imx->bitrate = IMX_I2C_BIT_RATE;
	ret = of_property_read_u32(pdev->dev.of_node,
				   "clock-frequency", &i2c_imx->bitrate);
	if (ret < 0 && pdata && pdata->bitrate)
		i2c_imx->bitrate = pdata->bitrate;

	/* Set up chip registers to defaults */
	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN,
			i2c_imx, IMX_I2C_I2CR);
	imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR);

	/* Add I2C adapter */
	ret = i2c_add_numbered_adapter(&i2c_imx->adapter);
	if (ret < 0) {
		dev_err(&pdev->dev, "registration failed\n");
		goto clk_disable;
	}

	/* Set up platform driver data */
	platform_set_drvdata(pdev, i2c_imx);
	clk_disable_unprepare(i2c_imx->clk);

	dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq);
	dev_dbg(&i2c_imx->adapter.dev, "device resources: %pR\n", res);
	dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n",
		i2c_imx->adapter.name);
	dev_info(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");

	/* Init DMA config if support*/
	i2c_imx_dma_request(i2c_imx, phy_addr);

	return 0;   /* Return OK */

clk_disable:
	clk_disable_unprepare(i2c_imx->clk);
	return ret;
}

static int i2c_imx_remove(struct platform_device *pdev)
{
	struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev);

	/* remove adapter */
	dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n");
	i2c_del_adapter(&i2c_imx->adapter);

	if (i2c_imx->dma)
		i2c_imx_dma_free(i2c_imx);

	/* setup chip registers to defaults */
	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IADR);
	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IFDR);
	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_I2CR);
	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_I2SR);

	return 0;
}

static struct platform_driver i2c_imx_driver = {
	.probe = i2c_imx_probe,
	.remove = i2c_imx_remove,
	.driver	= {
		.name	= DRIVER_NAME,
		.of_match_table = i2c_imx_dt_ids,
	},
	.id_table	= imx_i2c_devtype,
};

static int __init i2c_adap_imx_init(void)
{
	return platform_driver_register(&i2c_imx_driver);
}
subsys_initcall(i2c_adap_imx_init);

static void __exit i2c_adap_imx_exit(void)
{
	platform_driver_unregister(&i2c_imx_driver);
}
module_exit(i2c_adap_imx_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Darius Augulis");
MODULE_DESCRIPTION("I2C adapter driver for IMX I2C bus");
MODULE_ALIAS("platform:" DRIVER_NAME);