diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-imx.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-imx.c | 46 |
1 files changed, 22 insertions, 24 deletions
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 4c2a62b75b5..58832e578ff 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -48,6 +48,9 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_i2c.h> #include <mach/irqs.h> #include <mach/hardware.h> @@ -125,6 +128,11 @@ struct imx_i2c_struct { unsigned int ifdr; /* IMX_I2C_IFDR */ }; +static const struct of_device_id i2c_imx_dt_ids[] = { + { .compatible = "fsl,imx1-i2c", }, + { /* sentinel */ } +}; + /** Functions for IMX I2C adapter driver *************************************** *******************************************************************************/ @@ -466,10 +474,10 @@ static int __init i2c_imx_probe(struct platform_device *pdev) { struct imx_i2c_struct *i2c_imx; struct resource *res; - struct imxi2c_platform_data *pdata; + struct imxi2c_platform_data *pdata = pdev->dev.platform_data; void __iomem *base; resource_size_t res_size; - int irq; + int irq, bitrate; int ret; dev_dbg(&pdev->dev, "<%s>\n", __func__); @@ -485,19 +493,11 @@ static int __init i2c_imx_probe(struct platform_device *pdev) return -ENOENT; } - pdata = pdev->dev.platform_data; - - if (pdata && pdata->init) { - ret = pdata->init(&pdev->dev); - if (ret) - return ret; - } - res_size = resource_size(res); if (!request_mem_region(res->start, res_size, DRIVER_NAME)) { - ret = -EBUSY; - goto fail0; + dev_err(&pdev->dev, "request_mem_region failed\n"); + return -EBUSY; } base = ioremap(res->start, res_size); @@ -520,6 +520,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev) 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->irq = irq; i2c_imx->base = base; i2c_imx->res = res; @@ -546,10 +547,12 @@ static int __init i2c_imx_probe(struct platform_device *pdev) i2c_set_adapdata(&i2c_imx->adapter, i2c_imx); /* Set up clock divider */ - if (pdata && pdata->bitrate) - i2c_imx_set_clk(i2c_imx, pdata->bitrate); - else - i2c_imx_set_clk(i2c_imx, IMX_I2C_BIT_RATE); + bitrate = IMX_I2C_BIT_RATE; + ret = of_property_read_u32(pdev->dev.of_node, + "clock-frequency", &bitrate); + if (ret < 0 && pdata && pdata->bitrate) + bitrate = pdata->bitrate; + i2c_imx_set_clk(i2c_imx, bitrate); /* Set up chip registers to defaults */ writeb(0, i2c_imx->base + IMX_I2C_I2CR); @@ -562,6 +565,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev) goto fail5; } + of_i2c_register_devices(&i2c_imx->adapter); + /* Set up platform driver data */ platform_set_drvdata(pdev, i2c_imx); @@ -586,16 +591,12 @@ fail2: iounmap(base); fail1: release_mem_region(res->start, resource_size(res)); -fail0: - if (pdata && pdata->exit) - pdata->exit(&pdev->dev); return ret; /* Return error number */ } static int __exit i2c_imx_remove(struct platform_device *pdev) { struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev); - struct imxi2c_platform_data *pdata = pdev->dev.platform_data; /* remove adapter */ dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); @@ -611,10 +612,6 @@ static int __exit i2c_imx_remove(struct platform_device *pdev) writeb(0, i2c_imx->base + IMX_I2C_I2CR); writeb(0, i2c_imx->base + IMX_I2C_I2SR); - /* Shut down hardware */ - if (pdata && pdata->exit) - pdata->exit(&pdev->dev); - clk_put(i2c_imx->clk); iounmap(i2c_imx->base); @@ -628,6 +625,7 @@ static struct platform_driver i2c_imx_driver = { .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, + .of_match_table = i2c_imx_dt_ids, } }; |