mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 00:50:54 +07:00
78517428a0
This adds DT bindings for the IXP4xx GPIO controller. Cc: devicetree@vger.kernel.org Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
Intel IXP4xx XScale Networking Processors GPIO
|
|
|
|
This GPIO controller is found in the Intel IXP4xx processors.
|
|
It supports 16 GPIO lines.
|
|
|
|
The interrupt portions of the GPIO controller is hierarchical:
|
|
the synchronous edge detector is part of the GPIO block, but the
|
|
actual enabling/disabling of the interrupt line is done in the
|
|
main IXP4xx interrupt controller which has a 1:1 mapping for
|
|
the first 12 GPIO lines to 12 system interrupts.
|
|
|
|
The remaining 4 GPIO lines can not be used for receiving
|
|
interrupts.
|
|
|
|
The interrupt parent of this GPIO controller must be the
|
|
IXP4xx interrupt controller.
|
|
|
|
Required properties:
|
|
|
|
- compatible : Should be
|
|
"intel,ixp4xx-gpio"
|
|
- reg : Should contain registers location and length
|
|
- gpio-controller : marks this as a GPIO controller
|
|
- #gpio-cells : Should be 2, see gpio/gpio.txt
|
|
- interrupt-controller : marks this as an interrupt controller
|
|
- #interrupt-cells : a standard two-cell interrupt, see
|
|
interrupt-controller/interrupts.txt
|
|
|
|
Example:
|
|
|
|
gpio0: gpio@c8004000 {
|
|
compatible = "intel,ixp4xx-gpio";
|
|
reg = <0xc8004000 0x1000>;
|
|
gpio-controller;
|
|
#gpio-cells = <2>;
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
};
|