From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../devicetree/bindings/gpio/gpio-davinci.txt | 62 ++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-davinci.txt (limited to 'Documentation/devicetree/bindings/gpio/gpio-davinci.txt') diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt new file mode 100644 index 000000000..5079ba7d6 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt @@ -0,0 +1,62 @@ +Davinci/Keystone GPIO controller bindings + +Required Properties: +- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio" + +- reg: Physical base address of the controller and the size of memory mapped + registers. + +- gpio-controller : Marks the device node as a gpio controller. + +- #gpio-cells : Should be two. + - first cell is the pin number + - second cell is used to specify optional parameters (unused) + +- interrupt-parent: phandle of the parent interrupt controller. + +- interrupts: Array of GPIO interrupt number. Only banked or unbanked IRQs are + supported at a time. + +- ti,ngpio: The number of GPIO pins supported. + +- ti,davinci-gpio-unbanked: The number of GPIOs that have an individual interrupt + line to processor. + +The GPIO controller also acts as an interrupt controller. It uses the default +two cells specifier as described in Documentation/devicetree/bindings/ +interrupt-controller/interrupts.txt. + +Example: + +gpio: gpio@1e26000 { + compatible = "ti,dm6441-gpio"; + gpio-controller; + #gpio-cells = <2>; + reg = <0x226000 0x1000>; + interrupt-parent = <&intc>; + interrupts = <42 IRQ_TYPE_EDGE_BOTH 43 IRQ_TYPE_EDGE_BOTH + 44 IRQ_TYPE_EDGE_BOTH 45 IRQ_TYPE_EDGE_BOTH + 46 IRQ_TYPE_EDGE_BOTH 47 IRQ_TYPE_EDGE_BOTH + 48 IRQ_TYPE_EDGE_BOTH 49 IRQ_TYPE_EDGE_BOTH + 50 IRQ_TYPE_EDGE_BOTH>; + ti,ngpio = <144>; + ti,davinci-gpio-unbanked = <0>; + interrupt-controller; + #interrupt-cells = <2>; +}; + +leds { + compatible = "gpio-leds"; + + led1 { + label = "davinci:green:usr1"; + gpios = <&gpio 10 GPIO_ACTIVE_HIGH>; + ... + }; + + led2 { + label = "davinci:red:debug1"; + gpios = <&gpio 11 GPIO_ACTIVE_HIGH>; + ... + }; +}; -- cgit v1.2.3-54-g00ecf