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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt b/Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt new file mode 100644 index 000000000..8dc41ed99 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt @@ -0,0 +1,38 @@ +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>; +}; |