mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
20d4dcec04
The second cell in a gpio reference is used to pass GPIO_ACTIVE_LOW or GPIO_ACTIVE_HIGH. The gpio device can also be used as irq controller and a reference can contain the IRQ_TYPE_* values in the second cell. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
* Atmel GPIO controller (PIO)
|
|
|
|
Required properties:
|
|
- compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5.
|
|
- reg: Should contain GPIO controller registers location and length
|
|
- interrupts: Should be the port interrupt shared by all the pins.
|
|
- #gpio-cells: Should be two. The first cell is the pin number and
|
|
the second cell is used to specify optional parameters to declare if the GPIO
|
|
is active high or low. See gpio.txt.
|
|
- gpio-controller: Marks the device node as a GPIO controller.
|
|
- interrupt-controller: Marks the device node as an interrupt controller.
|
|
- #interrupt-cells: Should be two. The first cell is the pin number and the
|
|
second cell is used to specify irq type flags, see the two cell description
|
|
in interrupt-controller/interrupts.txt for details.
|
|
|
|
optional properties:
|
|
- #gpio-lines: Number of gpio if absent 32.
|
|
|
|
|
|
Example:
|
|
pioA: gpio@fffff200 {
|
|
compatible = "atmel,at91rm9200-gpio";
|
|
reg = <0xfffff200 0x100>;
|
|
interrupts = <2 4>;
|
|
#gpio-cells = <2>;
|
|
gpio-controller;
|
|
#gpio-lines = <19>;
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
};
|
|
|