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Subject[PATCH 04/14] devicetree: Add bindings for the ATH79 interrupt controllers
Date
Signed-off-by: Alban Bedel <albeu@free.fr>
---
.../interrupt-controller/qca,ath79-cpu-intc.txt | 45 ++++++++++++++++++++++
1 file changed, 45 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
new file mode 100644
index 0000000..1548512
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
@@ -0,0 +1,45 @@
+Binding for Qualcomm Atheros AR7xxx/AR9XXX CPU interrupt controller
+
+On most SoC the IRQ controller need to flush the DDR FIFO before running
+the interrupt handler of some devices. This is configured using the
+qca,ddr-wb-channels and qca,ddr-wb-channel-interrupts properties.
+
+Required Properties:
+
+- compatible: has to be "qca,<soctype>-cpu-intc", "qca,ar7100-cpu-intc"
+ as fallback
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode interrupt
+ source, should be 1 for intc
+
+Please refer to interrupts.txt in this directory for details of the common
+Interrupt Controllers bindings used by client devices.
+
+Optional Properties:
+
+- qca,ddr-wb-channel-interrupts: List of the interrupts needing a write
+ buffer flush
+- qca,ddr-wb-channels: List of phandles to the write buffer channels for
+ each interrupt. If qca,ddr-wb-channel-interrupts is not present the interrupt
+ default to the entry's index.
+
+Example:
+
+ cpuintc@0 {
+ compatible = "qca,ar9132-cpu-intc", "qca,ar7100-cpu-intc";
+
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ qca,ddr-wb-channel-interrupts = <2>, <3>, <4>, <5>;
+ qca,ddr-wb-channels = <&ddr_ctrl 3>, <&ddr_ctrl 2>,
+ <&ddr_ctrl 0>, <&ddr_ctrl 1>;
+ };
+
+ ...
+
+ ddr_ctrl: ddr-controller@18000000 {
+ ...
+ #qca,ddr-wb-channel-cells = <1>;
+ };
+
--
2.0.0


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