diff options
| author | John Bonesio <bones@secretlab.ca> | 2011-06-22 09:16:56 -0700 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2011-07-27 00:02:28 +0100 |
| commit | 5c470f39eea66ff00b31136f8bce9359d6b95375 (patch) | |
| tree | 129c3a0cbd22fca7f3d953e5e3524505d4e4e737 /drivers | |
| parent | ba5b56cb3e3d2cab73d4fee9a022bb69462a8cd9 (diff) | |
| download | linux-stable-5c470f39eea66ff00b31136f8bce9359d6b95375.tar.gz linux-stable-5c470f39eea66ff00b31136f8bce9359d6b95375.tar.bz2 linux-stable-5c470f39eea66ff00b31136f8bce9359d6b95375.zip | |
i2c: Tegra: Add DeviceTree support
This patch modifies the tegra i2c driver so that it can be initiailized
using the device tree along with the devices connected to the i2c bus.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: OIof Johansson <olof@lixom.net>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index fb3b4f8f8152..2440b7411978 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -26,6 +26,7 @@ #include <linux/delay.h> #include <linux/slab.h> #include <linux/i2c-tegra.h> +#include <linux/of_i2c.h> #include <asm/unaligned.h> @@ -546,6 +547,7 @@ static int tegra_i2c_probe(struct platform_device *pdev) struct resource *iomem; struct clk *clk; struct clk *i2c_clk; + const unsigned int *prop; void *base; int irq; int ret = 0; @@ -603,7 +605,17 @@ static int tegra_i2c_probe(struct platform_device *pdev) i2c_dev->irq = irq; i2c_dev->cont_id = pdev->id; i2c_dev->dev = &pdev->dev; - i2c_dev->bus_clk_rate = pdata ? pdata->bus_clk_rate : 100000; + + i2c_dev->bus_clk_rate = 100000; /* default clock rate */ + if (pdata) { + i2c_dev->bus_clk_rate = pdata->bus_clk_rate; + + } else if (i2c_dev->dev->of_node) { /* if there is a device tree node ... */ + prop = of_get_property(i2c_dev->dev->of_node, + "clock-frequency", NULL); + if (prop) + i2c_dev->bus_clk_rate = be32_to_cpup(prop); + } if (pdev->id == 3) i2c_dev->is_dvc = 1; @@ -633,6 +645,7 @@ static int tegra_i2c_probe(struct platform_device *pdev) i2c_dev->adapter.algo = &tegra_i2c_algo; i2c_dev->adapter.dev.parent = &pdev->dev; i2c_dev->adapter.nr = pdev->id; + i2c_dev->adapter.dev.of_node = pdev->dev.of_node; ret = i2c_add_numbered_adapter(&i2c_dev->adapter); if (ret) { @@ -640,6 +653,8 @@ static int tegra_i2c_probe(struct platform_device *pdev) goto err_free_irq; } + of_i2c_register_devices(&i2c_dev->adapter); + return 0; err_free_irq: free_irq(i2c_dev->irq, i2c_dev); |