diff options
| author | Marc Dietrich <marvin24@gmx.de> | 2011-11-01 21:37:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-26 17:17:14 -0800 |
| commit | 7990b0d7ec449b10da383bab191eb487185aadce (patch) | |
| tree | 298fec26991b33ad9fb1a7e4fc7dbf56d0994551 | |
| parent | d9f26a6689a3e4ae643fca9c2acda3148b717e63 (diff) | |
staging: nvec: add device tree support
This adds device tree support to the nvec driver. By using this method
it is no longer necessary to specify platform data through a board
file.
Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
Cc: Julian Andres Klode <jak@jak-linux.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | Documentation/devicetree/bindings/nvec/nvec_nvidia.txt | 9 | ||||
| -rw-r--r-- | drivers/staging/nvec/nvec.c | 30 |
2 files changed, 37 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/nvec/nvec_nvidia.txt b/Documentation/devicetree/bindings/nvec/nvec_nvidia.txt new file mode 100644 index 00000000000..5aeee53ff9f --- /dev/null +++ b/Documentation/devicetree/bindings/nvec/nvec_nvidia.txt @@ -0,0 +1,9 @@ +NVIDIA compliant embedded controller + +Required properties: +- compatible : should be "nvidia,nvec". +- reg : the iomem of the i2c slave controller +- interrupts : the interrupt line of the i2c slave controller +- clock-frequency : the frequency of the i2c bus +- gpios : the gpio used for ec request +- slave-addr: the i2c address of the slave controller diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c index e06b867d1e0..fafdfa25e13 100644 --- a/drivers/staging/nvec/nvec.c +++ b/drivers/staging/nvec/nvec.c @@ -27,6 +27,8 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/list.h> #include <linux/mfd/core.h> #include <linux/mutex.h> @@ -727,8 +729,24 @@ static int __devinit tegra_nvec_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, nvec); nvec->dev = &pdev->dev; - nvec->gpio = pdata->gpio; - nvec->i2c_addr = pdata->i2c_addr; + + if (pdata) { + nvec->gpio = pdata->gpio; + nvec->i2c_addr = pdata->i2c_addr; + } else if (nvec->dev->of_node) { + nvec->gpio = of_get_named_gpio(nvec->dev->of_node, "request-gpios", 0); + if (nvec->gpio < 0) { + dev_err(&pdev->dev, "no gpio specified"); + goto failed; + } + if (of_property_read_u32(nvec->dev->of_node, "slave-addr", &nvec->i2c_addr)) { + dev_err(&pdev->dev, "no i2c address specified"); + goto failed; + } + } else { + dev_err(&pdev->dev, "no platform data\n"); + goto failed; + } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { @@ -893,6 +911,13 @@ static int tegra_nvec_resume(struct platform_device *pdev) #define tegra_nvec_resume NULL #endif +/* Match table for of_platform binding */ +static const struct of_device_id nvidia_nvec_of_match[] __devinitconst = { + { .compatible = "nvidia,nvec", }, + {}, +}; +MODULE_DEVICE_TABLE(of, nvidia_nvec_of_match); + static struct platform_driver nvec_device_driver = { .probe = tegra_nvec_probe, .remove = __devexit_p(tegra_nvec_remove), @@ -901,6 +926,7 @@ static struct platform_driver nvec_device_driver = { .driver = { .name = "nvec", .owner = THIS_MODULE, + .of_match_table = nvidia_nvec_of_match, } }; |