diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2013-09-12 12:36:46 (GMT) |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-09-30 04:02:32 (GMT) |
| commit | 7679c0e19120ee7839adf1f05904cbfcc7a7c2b9 (patch) | |
| tree | 41ca01d38eea96b54a53e10c286289c19b39393c /drivers/i2c | |
| parent | 8d0494037bb2af32a22563d40703c1263fca318d (diff) | |
| download | linux-7679c0e19120ee7839adf1f05904cbfcc7a7c2b9.tar.xz | |
i2c: rcar: add Device Tree support
This patch adds Device Tree support to the i2c-rcar driver and respective
documentation.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 9325db4..1f285a3 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -33,6 +33,7 @@ #include <linux/i2c/i2c-rcar.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/slab.h> @@ -638,6 +639,15 @@ static const struct i2c_algorithm rcar_i2c_algo = { .functionality = rcar_i2c_func, }; +static const struct of_device_id rcar_i2c_dt_ids[] = { + { .compatible = "renesas,i2c-rcar", .data = (void *)I2C_RCAR_H1 }, + { .compatible = "renesas,i2c-r8a7778", .data = (void *)I2C_RCAR_H1 }, + { .compatible = "renesas,i2c-r8a7779", .data = (void *)I2C_RCAR_H1 }, + { .compatible = "renesas,i2c-r8a7790", .data = (void *)I2C_RCAR_H2 }, + {}, +}; +MODULE_DEVICE_TABLE(of, rcar_i2c_dt_ids); + static int rcar_i2c_probe(struct platform_device *pdev) { struct i2c_rcar_platform_data *pdata = dev_get_platdata(&pdev->dev); @@ -655,10 +665,15 @@ static int rcar_i2c_probe(struct platform_device *pdev) } bus_speed = 100000; /* default 100 kHz */ - if (pdata && pdata->bus_speed) + ret = of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed); + if (ret < 0 && pdata && pdata->bus_speed) bus_speed = pdata->bus_speed; - priv->devtype = platform_get_device_id(pdev)->driver_data; + if (pdev->dev.of_node) + priv->devtype = (long)of_match_device(rcar_i2c_dt_ids, + dev)->data; + else + priv->devtype = platform_get_device_id(pdev)->driver_data; ret = rcar_i2c_clock_calculate(priv, bus_speed, dev); if (ret < 0) @@ -679,6 +694,7 @@ static int rcar_i2c_probe(struct platform_device *pdev) adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; adap->retries = 3; adap->dev.parent = dev; + adap->dev.of_node = dev->of_node; i2c_set_adapdata(adap, priv); strlcpy(adap->name, pdev->name, sizeof(adap->name)); @@ -726,6 +742,7 @@ static struct platform_driver rcar_i2c_driver = { .driver = { .name = "i2c-rcar", .owner = THIS_MODULE, + .of_match_table = rcar_i2c_dt_ids, }, .probe = rcar_i2c_probe, .remove = rcar_i2c_remove, |