forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.1 KiB
38 lines
1.1 KiB
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>; |
|
};
|
|
|