Re: [PATCH v2 2/4] dt-bindings: misc: Aspeed coprocessor interrupt controller
flat view
From: Rob Herring <robh@kernel.org>
Date: 2018-06-20 19:49:37
Also in:
linux-arm-kernel, linux-aspeed
On Mon, Jun 18, 2018 at 02:59:00PM +1000, Benjamin Herrenschmidt wrote:
quoted hunk ↗ jump to hunk
Add the device-tree binding definition for the AST2400 and AST2500 coprocessor interrupt controller Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- .../devicetree/bindings/misc/aspeed,cvic.txt | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/aspeed,cvic.txtdiff --git a/Documentation/devicetree/bindings/misc/aspeed,cvic.txt b/Documentation/devicetree/bindings/misc/aspeed,cvic.txt new file mode 100644 index 000000000000..2562e2991e4d --- /dev/null +++ b/Documentation/devicetree/bindings/misc/aspeed,cvic.txt@@ -0,0 +1,35 @@ +* Aspeed AST2400 and AST2500 coprocessor interrupt controller + +This file describes the bindings for the interrupt controller present +in the AST2400 and AST2500 BMC SoCs which provides interrupt to the +ColdFire coprocessor. + +It is not a normal interrupt controller and it would be rather +inconvenient to create an interrupt tree for it as it somewhat shares +some of the same sources as the main ARM interrupt controller but with +different numbers. + +The AST2500 supports a SW generated interrupt + +Required properties: +- reg: address and length of the register for the device. +- compatible: "aspeed,cvic" and one of: + "aspeed,ast2400-cvic" + or + "aspeed,ast2500-cvic" + +- valid-sources: One cell, bitmap of supported sources for the implementation
aspeed,valid-sources This could use a better description. I thought this was which bits to use for s/w irq, but then I read the next property... Alternatively, why can't this be implied by the compatible?
+
+Optional properties;
+- copro-sw-interrupts: List of interrupt numbers that can be used as
+ SW interrupts from the ARM to the coprocessor.
+ (AST2500 only)
+
+Example:
+
+ cvic: copro-interrupt-controller@1e6c2000 {
+ compatible = "aspeed,ast2500-cvic";
+ valid-sources = <0xffffffff>;
+ copro-sw-interrupts = <1>;
+ reg = <0x1e6c2000 0x80>;
+ };
--
2.17.1
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