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gpio/tegra: add devicetree support

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Add support for decoding gpios from the device tree

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Grant Likely
2011-06-15 14:54:14 -06:00
parent ea5a9607cb
commit df2212270c
2 changed files with 17 additions and 0 deletions
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7
Documentation/devicetree/bindings/gpio/gpio_nvidia.txt Normal file
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@@ -0,0 +1,7 @@
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.

10
drivers/gpio/gpio-tegra.c
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@@ -23,6 +23,7 @@
#include <linux/io.h> #include <linux/io.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/of.h>
#include <asm/mach/irq.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); gpiochip_add(&tegra_gpio_chip);
for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) { for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {