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staging: mt7621-gpio: dt-bindings: complete documentation for the gpio

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This commit reviews and complete documentation for gpio related stuff
in the mt7621 device. It should be complete now.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2018-05-25 18:54:53 +02:00 committed by Greg Kroah-Hartman
parent f910cc46f4
commit 94832e0795
1 changed files with 9 additions and 5 deletions
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14
drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt
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@ -13,15 +13,17 @@ Required properties for the top level node:
- "mediatek,mt7621-gpio" for Mediatek controllers
- reg : Physical base address and length of the controller's registers
- interrupt-parent : phandle of the parent interrupt controller.
- interrupts = Interrupt specifier for the controllers interrupt
- interrupts : Interrupt specifier for the controllers interrupt.
- interrupt-controller : Mark the device node as an interrupt controller.
- #interrupt-cells : Should be 1. The first cell is the GPIO number.
Required properties for the GPIO bank node:
- compatible:
- "mediatek,mt7621-gpio-bank" for Mediatek banks
- #gpio-cells : Should be two.
- first cell is the pin number
- second cell is used to specify optional parameters (unused)
- gpio-controller : Marks the device node as a GPIO controller
- #gpio-cells : Should be two. The first cell is the GPIO pin number and the
second cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
- gpio-controller : Marks the device node as a GPIO controller.
- reg : The id of the bank that the node describes.
Example:
@ -34,6 +36,8 @@ Example:
interrupt-parent = <&gic>;
interrupts = <GIC_SHARED 12 IRQ_TYPE_LEVEL_HIGH>;
interrupt-controller;
#interrupt-cells = <1>;
gpio0: bank@0 {
reg = <0>;