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Subject[PATCH 2/2] gpio/tegra: add devicetree support
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Date
Add support for decoding gpios from the device tree

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---
.../devicetree/bindings/gpio/gpio_nvidia.txt | 7 +++++++
drivers/gpio/gpio-tegra.c | 10 ++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio_nvidia.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
new file mode 100644
index 0000000..afb3ff3
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
@@ -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.
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index 919d638..13afb88 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.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,tegra250-gpio");
+#endif /* CONFIG_OF_GPIO */
+
gpiochip_add(&tegra_gpio_chip);

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


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