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Subject[PATCH v4 4/4] dt-bindings: dw-apb-ictl: support hierarchy irq domain
Date
Add support to use dw-apb-ictl as primary interrupt controller.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
.../bindings/interrupt-controller/snps,dw-apb-ictl.txt | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt b/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt
index 086ff08322db94f..2db59df9408f4c6 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/snps,dw-apb-ictl.txt
@@ -2,7 +2,8 @@ Synopsys DesignWare APB interrupt controller (dw_apb_ictl)

Synopsys DesignWare provides interrupt controller IP for APB known as
dw_apb_ictl. The IP is used as secondary interrupt controller in some SoCs with
-APB bus, e.g. Marvell Armada 1500.
+APB bus, e.g. Marvell Armada 1500. It can also be used as primary interrupt
+controller in some SoCs, e.g. Hisilicon SD5203.

Required properties:
- compatible: shall be "snps,dw-apb-ictl"
@@ -10,6 +11,8 @@ Required properties:
region starting with ENABLE_LOW register
- interrupt-controller: identifies the node as an interrupt controller
- #interrupt-cells: number of cells to encode an interrupt-specifier, shall be 1
+
+Additional required property when it's used as secondary interrupt controller:
- interrupts: interrupt reference to primary interrupt controller

The interrupt sources map to the corresponding bits in the interrupt
@@ -21,6 +24,7 @@ registers, i.e.
- (optional) fast interrupts start at 64.

Example:
+ /* dw_apb_ictl is used as secondary interrupt controller */
aic: interrupt-controller@3000 {
compatible = "snps,dw-apb-ictl";
reg = <0x3000 0xc00>;
@@ -29,3 +33,11 @@ Example:
interrupt-parent = <&gic>;
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
};
+
+ /* dw_apb_ictl is used as primary interrupt controller */
+ vic: interrupt-controller@10130000 {
+ compatible = "snps,dw-apb-ictl";
+ reg = <0x10130000 0x1000>;
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
--
1.8.3

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