mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 13:58:41 +07:00
87cd38dfd9
This adds Device Tree binding documentation for the external interrupt lines with configurable polarity present on some Layerscape SOCs. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20191107122115.6244-2-linux@rasmusvillemoes.dk
50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
* Freescale Layerscape external IRQs
|
|
|
|
Some Layerscape SOCs (LS1021A, LS1043A, LS1046A) support inverting
|
|
the polarity of certain external interrupt lines.
|
|
|
|
The device node must be a child of the node representing the
|
|
Supplemental Configuration Unit (SCFG).
|
|
|
|
Required properties:
|
|
- compatible: should be "fsl,<soc-name>-extirq", e.g. "fsl,ls1021a-extirq".
|
|
- #interrupt-cells: Must be 2. The first element is the index of the
|
|
external interrupt line. The second element is the trigger type.
|
|
- #address-cells: Must be 0.
|
|
- interrupt-controller: Identifies the node as an interrupt controller
|
|
- reg: Specifies the Interrupt Polarity Control Register (INTPCR) in
|
|
the SCFG.
|
|
- interrupt-map: Specifies the mapping from external interrupts to GIC
|
|
interrupts.
|
|
- interrupt-map-mask: Must be <0xffffffff 0>.
|
|
|
|
Example:
|
|
scfg: scfg@1570000 {
|
|
compatible = "fsl,ls1021a-scfg", "syscon";
|
|
reg = <0x0 0x1570000 0x0 0x10000>;
|
|
big-endian;
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
ranges = <0x0 0x0 0x1570000 0x10000>;
|
|
|
|
extirq: interrupt-controller@1ac {
|
|
compatible = "fsl,ls1021a-extirq";
|
|
#interrupt-cells = <2>;
|
|
#address-cells = <0>;
|
|
interrupt-controller;
|
|
reg = <0x1ac 4>;
|
|
interrupt-map =
|
|
<0 0 &gic GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>,
|
|
<1 0 &gic GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>,
|
|
<2 0 &gic GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>,
|
|
<3 0 &gic GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH>,
|
|
<4 0 &gic GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>,
|
|
<5 0 &gic GIC_SPI 169 IRQ_TYPE_LEVEL_HIGH>;
|
|
interrupt-map-mask = <0xffffffff 0x0>;
|
|
};
|
|
};
|
|
|
|
|
|
interrupts-extended = <&gic GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>,
|
|
<&extirq 1 IRQ_TYPE_LEVEL_LOW>;
|