Actions Semi OWL family SoC's provides support for external interrupt
controller to be connected and controlled using SIRQ pins. S500, S700
and S900 provides 3 SIRQ lines and works independently for 3 external
interrupt controllers.
Signed-off-by: Parthiban Nallathambi <pn@xxxxxxx>
Signed-off-by: Saravanan Sekar <sravanhome@xxxxxxxxx>
---
.../interrupt-controller/actions,owl-sirq.txt | 46 ++++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.txt
diff --git a/Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.txt b/Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.txt
new file mode 100644
index 000000000000..4b8437751331
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.txt
@@ -0,0 +1,46 @@
+Actions Semi Owl SoCs SIRQ interrupt controller
+
+S500, S700 and S900 SoC's from Actions provides 3 SPI's from GIC,
+in which external interrupt controller can be connected. 3 SPI's
+45, 46, 47 from GIC are directly exposed as SIRQ. It has
+the following properties:
+
+- inputs three interrupt signal from external interrupt controller
+
+Required properties:
+
+- compatible: should be "actions,owl-sirq"
+- reg: physical base address of the controller and length of memory mapped.
+- interrupt-controller: identifies the node as an interrupt controller
+- #interrupt-cells: specifies the number of cells needed to encode an interrupt
+ source, should be 2.
+- actions,sirq-shared-reg: Applicable for S500 and S700 where SIRQ register
+ details are maintained at same offset/register.
+- actions,sirq-offset: register offset for SIRQ interrupts. When registers are
+ shared, all the three offsets will be same (S500 and S700).
+- actions,sirq-clk-sel: external interrupt controller can be either
+ connected to 32Khz or 24Mhz external/internal clock. This needs
+ to be configured for per SIRQ line. Failing defaults to 32Khz clock.
+
+Example for S900:
+
+sirq: interrupt-controller@e01b0000 {
+ compatible = "actions,owl-sirq";
+ reg = <0 0xe01b0000 0 0x1000>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ actions,sirq-clk-sel = <0 0 0>;
+ actions,sirq-offset = <0x200 0x528 0x52c>;
+};
+
+Example for S500 and S700:
+
+sirq: interrupt-controller@e01b0000 {
+ compatible = "actions,owl-sirq";
+ reg = <0 0xe01b0000 0 0x1000>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ actions,sirq-shared-reg;
+ actions,sirq-clk-sel = <0 0 0>;
+ actions,sirq-offset = <0x200 0x200 0x200>;
+};
--
2.14.4
