mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
e4b194aa0b
This patch adds a DT binding documentation for Cadence GPIO controller. Signed-off-by: Jan Kotas <jank@cadence.com> Reviewed-by: Rob Herring <robh@kernel.org> [Removed interrupt-parent] Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
Cadence GPIO controller bindings
|
|
|
|
Required properties:
|
|
- compatible: should be "cdns,gpio-r1p02".
|
|
- reg: the register base address and size.
|
|
- #gpio-cells: should be 2.
|
|
* first cell is the GPIO number.
|
|
* second cell specifies the 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 as a GPIO controller.
|
|
- clocks: should contain one entry referencing the peripheral clock driving
|
|
the GPIO controller.
|
|
|
|
Optional properties:
|
|
- ngpios: integer number of gpio lines supported by this controller, up to 32.
|
|
- interrupts: interrupt specifier for the controllers interrupt.
|
|
- interrupt-controller: marks the device as an interrupt controller. When
|
|
defined, interrupts, interrupt-parent and #interrupt-cells
|
|
are required.
|
|
- interrupt-cells: should be 2.
|
|
* first cell is the GPIO number you want to use as an IRQ source.
|
|
* second cell specifies the IRQ type, as defined in
|
|
<dt-bindings/interrupt-controller/irq.h>.
|
|
Currently only level sensitive IRQs are supported.
|
|
|
|
|
|
Example:
|
|
gpio0: gpio-controller@fd060000 {
|
|
compatible = "cdns,gpio-r1p02";
|
|
reg =<0xfd060000 0x1000>;
|
|
|
|
clocks = <&gpio_clk>;
|
|
|
|
interrupt-parent = <&gic>;
|
|
interrupts = <0 5 IRQ_TYPE_LEVEL_HIGH>;
|
|
|
|
gpio-controller;
|
|
#gpio-cells = <2>;
|
|
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
};
|