diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2011-07-05 23:44:23 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-07-21 15:45:02 -0600 |
| commit | 359ece7ae3a0e3640b6f40dd8caa85cf2aec7aac (patch) | |
| tree | 13a7d58e7372ae269130f6bca238e497200aaf54 | |
| parent | b5ef209d293c51692833b70202fee7f19931b8f8 (diff) | |
gpio/tegra: add devicetree support
Add support for decoding gpios from the device tree
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio_nvidia.txt | 7 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/gpio.c | 10 |
2 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt new file mode 100644 index 00000000000..64aac39e6ed --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt @@ -0,0 +1,7 @@ +NVIDIA Tegra 2 GPIO controller + +Required properties: +- compatible : "nvidia,tegra20-gpio" +- #gpio-cells : Should be two. The first cell is the pin number and the + second cell is used to specify optional parameters (currently unused). +- gpio-controller : Marks the device node as a GPIO controller. diff --git a/arch/arm/mach-tegra/gpio.c b/arch/arm/mach-tegra/gpio.c index 919d6383773..747eb40e8af 100644 --- a/arch/arm/mach-tegra/gpio.c +++ b/arch/arm/mach-tegra/gpio.c @@ -23,6 +23,7 @@ #include <linux/io.h> #include <linux/gpio.h> +#include <linux/of.h> #include <asm/mach/irq.h> @@ -340,6 +341,15 @@ static int __init tegra_gpio_init(void) } } +#ifdef CONFIG_OF_GPIO + /* + * This isn't ideal, but it gets things hooked up until this + * driver is converted into a platform_device + */ + tegra_gpio_chip.of_node = of_find_compatible_node(NULL, NULL, + "nvidia,tegra20-gpio"); +#endif /* CONFIG_OF_GPIO */ + gpiochip_add(&tegra_gpio_chip); for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) { |