Commit df221227 authored by Grant Likely's avatar Grant Likely
Browse files

gpio/tegra: add devicetree support 



Add support for decoding gpios from the device tree

Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
parent ea5a9607

Documentation/devicetree/bindings/gpio/gpio_nvidia.txt

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NVIDIA Tegra 2 GPIO controller



Required properties:

- compatible : "nvidia,tegra250-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.

drivers/gpio/gpio-tegra.c

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@@ -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,tegra250-gpio");

#endif /* CONFIG_OF_GPIO */



	gpiochip_add(&tegra_gpio_chip);



	for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {