Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 580b9676 authored by Stefan Agner's avatar Stefan Agner Committed by Linus Walleij
Browse files

Documentation: dts: add bindings for Vybrid GPIO/PORT module 



The Vybrid SoC device tree (vf610.dtsi) used this bindings since
its initial commit in May 2013. However, a proper gpiolib driver
was missing so far. With the addition of the gpiolib driver,
the bindings proved to be useful and complete, hence a good time
to add the documentation.

Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
Acked-by: default avatarShawn Guo <shawn.guo@freescale.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7f2691a1

Documentation/devicetree/bindings/gpio/gpio-vf610.txt

0 → 100644
+55 −0
Original line number Diff line number Diff line 
* Freescale VF610 PORT/GPIO module



The Freescale PORT/GPIO modules are two adjacent modules providing GPIO

functionality. Each pair serves 32 GPIOs. The VF610 has 5 instances of

each, and each PORT module has its own interrupt.



Required properties for GPIO node:

- compatible : Should be "fsl,<soc>-gpio", currently "fsl,vf610-gpio"

- reg : The first reg tuple represents the PORT module, the second tuple

  the GPIO module.

- interrupts : Should be the port interrupt shared by all 32 pins.

- gpio-controller : Marks the device node as a gpio controller.

- #gpio-cells : Should be two. The first cell is the pin number and

  the second cell is used to specify the gpio polarity:

      0 = active high

      1 = active low

- interrupt-controller: Marks the device node as an interrupt controller.

- #interrupt-cells : Should be 2.  The first cell is the GPIO number.

  The second cell bits[3:0] is used to specify trigger type and level flags:

      1 = low-to-high edge triggered.

      2 = high-to-low edge triggered.

      4 = active high level-sensitive.

      8 = active low level-sensitive.



Note: Each GPIO port should have an alias correctly numbered in "aliases"

node.



Examples:



aliases {

	gpio0 = &gpio1;

	gpio1 = &gpio2;

};



gpio1: gpio@40049000 {

	compatible = "fsl,vf610-gpio";

	reg = <0x40049000 0x1000 0x400ff000 0x40>;

	interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;

	gpio-controller;

	#gpio-cells = <2>;

	interrupt-controller;

	#interrupt-cells = <2>;

	gpio-ranges = <&iomuxc 0 0 32>;

};



gpio2: gpio@4004a000 {

	compatible = "fsl,vf610-gpio";

	reg = <0x4004a000 0x1000 0x400ff040 0x40>;

	interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;

	gpio-controller;

	#gpio-cells = <2>;

	interrupt-controller;

	#interrupt-cells = <2>;

	gpio-ranges = <&iomuxc 0 32 32>;

};