| From 97bee269bbd0af7c8757d37a6ae3683f7f7575b4 Mon Sep 17 00:00:00 2001 |
| From: Michal Simek <michal.simek@xilinx.com> |
| Date: Mon, 3 Jun 2013 14:31:21 +0200 |
| Subject: DT: Add documentation for gpio-xilinx |
| |
| Describe gpio-xilinx binding. |
| |
| Signed-off-by: Michal Simek <michal.simek@xilinx.com> |
| Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
| (cherry picked from commit 6090a0fa5cefe6cc0aa95786b21dcf1bf19942da) |
| Signed-off-by: Daniel Sangorrin <daniel.sangorrin@toshiba.co.jp> |
| Signed-off-by: Yoshitake Kobayashi <yoshitake.kobayashi@toshiba.co.jp> |
| --- |
| .../devicetree/bindings/gpio/gpio-xilinx.txt | 48 ++++++++++++++++++++++ |
| 1 file changed, 48 insertions(+) |
| create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xilinx.txt |
| |
| diff --git a/Documentation/devicetree/bindings/gpio/gpio-xilinx.txt b/Documentation/devicetree/bindings/gpio/gpio-xilinx.txt |
| new file mode 100644 |
| index 000000000000..63bf4becd5f0 |
| --- /dev/null |
| +++ b/Documentation/devicetree/bindings/gpio/gpio-xilinx.txt |
| @@ -0,0 +1,48 @@ |
| +Xilinx plb/axi GPIO controller |
| + |
| +Dual channel GPIO controller with configurable number of pins |
| +(from 1 to 32 per channel). Every pin can be configured as |
| +input/output/tristate. Both channels share the same global IRQ but |
| +local interrupts can be enabled on channel basis. |
| + |
| +Required properties: |
| +- compatible : Should be "xlnx,xps-gpio-1.00.a" |
| +- reg : Address and length of the register set for the device |
| +- #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. |
| + |
| +Optional properties: |
| +- interrupts : Interrupt mapping for GPIO IRQ. |
| +- interrupt-parent : Phandle for the interrupt controller that |
| + services interrupts for this device. |
| +- xlnx,all-inputs : if n-th bit is setup, GPIO-n is input |
| +- xlnx,dout-default : if n-th bit is 1, GPIO-n default value is 1 |
| +- xlnx,gpio-width : gpio width |
| +- xlnx,tri-default : if n-th bit is 1, GPIO-n is in tristate mode |
| +- xlnx,is-dual : if 1, controller also uses the second channel |
| +- xlnx,all-inputs-2 : as above but for the second channel |
| +- xlnx,dout-default-2 : as above but the second channel |
| +- xlnx,gpio2-width : as above but for the second channel |
| +- xlnx,tri-default-2 : as above but for the second channel |
| + |
| + |
| +Example: |
| +gpio: gpio@40000000 { |
| + #gpio-cells = <2>; |
| + compatible = "xlnx,xps-gpio-1.00.a"; |
| + gpio-controller ; |
| + interrupt-parent = <µblaze_0_intc>; |
| + interrupts = < 6 2 >; |
| + reg = < 0x40000000 0x10000 >; |
| + xlnx,all-inputs = <0x0>; |
| + xlnx,all-inputs-2 = <0x0>; |
| + xlnx,dout-default = <0x0>; |
| + xlnx,dout-default-2 = <0x0>; |
| + xlnx,gpio-width = <0x2>; |
| + xlnx,gpio2-width = <0x2>; |
| + xlnx,interrupt-present = <0x1>; |
| + xlnx,is-dual = <0x1>; |
| + xlnx,tri-default = <0xffffffff>; |
| + xlnx,tri-default-2 = <0xffffffff>; |
| +} ; |
| -- |
| 1.8.5.rc3 |
| |