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author | Tien Hock Loh <thloh@altera.com> | 2015-02-24 01:53:02 -0800 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2015-03-07 20:36:33 +0100 |
commit | 4fd9bbc6e0713a0106a7771b639a963f4b2411c6 (patch) | |
tree | 6b3b7189a6a364b65deb6196112cc348bb149d87 /Documentation/devicetree/bindings | |
parent | c5abbba932a4afd82cb35f3d6e691a2b4a0613be (diff) | |
download | op-kernel-dev-4fd9bbc6e0713a0106a7771b639a963f4b2411c6.zip op-kernel-dev-4fd9bbc6e0713a0106a7771b639a963f4b2411c6.tar.gz |
drivers/gpio: Altera soft IP GPIO driver device tree binding
Adds a new driver device tree binding for Altera soft GPIO IP
Signed-off-by: Tien Hock Loh <thloh@altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-altera.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-altera.txt b/Documentation/devicetree/bindings/gpio/gpio-altera.txt new file mode 100644 index 0000000..12f5014 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-altera.txt @@ -0,0 +1,43 @@ +Altera GPIO controller bindings + +Required properties: +- compatible: + - "altr,pio-1.0" +- reg: Physical base address and length of the controller's registers. +- #gpio-cells : Should be 2 + - The first cell is the gpio offset number. + - The second cell is reserved and is currently unused. +- gpio-controller : Marks the device node as a GPIO controller. +- interrupt-controller: Mark the device node as an interrupt controller +- #interrupt-cells : Should be 1. The interrupt type is fixed in the hardware. + - The first cell is the GPIO offset number within the GPIO controller. +- interrupts: Specify the interrupt. +- altr,interrupt-trigger: Specifies the interrupt trigger type the GPIO + hardware is synthesized. This field is required if the Altera GPIO controller + used has IRQ enabled as the interrupt type is not software controlled, + but hardware synthesized. Required if GPIO is used as an interrupt + controller. The value is defined in <dt-bindings/interrupt-controller/irq.h> + Only the following flags are supported: + IRQ_TYPE_EDGE_RISING + IRQ_TYPE_EDGE_FALLING + IRQ_TYPE_EDGE_BOTH + IRQ_TYPE_LEVEL_HIGH + +Optional properties: +- altr,ngpio: Width of the GPIO bank. This defines how many pins the + GPIO device has. Ranges between 1-32. Optional and defaults to 32 if not + specified. + +Example: + +gpio_altr: gpio@0xff200000 { + compatible = "altr,pio-1.0"; + reg = <0xff200000 0x10>; + interrupts = <0 45 4>; + altr,ngpio = <32>; + altr,interrupt-trigger = <IRQ_TYPE_EDGE_RISING>; + #gpio-cells = <2>; + gpio-controller; + #interrupt-cells = <1>; + interrupt-controller; +}; |