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linux/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt

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gpio/tegra: add devicetree support 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>
2011-06-15 20:54:14 +00:00
NVIDIA Tegra 2 GPIO controller
Required properties:
gpio/tegra: Use engineering names in DT compatible property Engineering names are more stable than marketing names. Hence, use them for Device Tree compatible properties instead. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-05 20:15:18 +00:00
- compatible : "nvidia,tegra20-gpio"
gpio/tegra: add devicetree support 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>
2011-06-15 20:54:14 +00:00
- #gpio-cells : Should be two. The first cell is the pin number and the
gpio/tegra: dt: add binding for gpio polarity Allocate one bit in the available extra cell to indicate if the gpio should be considered logically inverted. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-15 05:17:13 +00:00
second cell is used to specify optional parameters:
- bit 0 specifies polarity (0 for normal, 1 for inverted)
gpio/tegra: add devicetree support 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>
2011-06-15 20:54:14 +00:00
- gpio-controller : Marks the device node as a GPIO controller.
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