[PATCH 17/19] dt-bindings: ipmi: Add optional SerIRQ property to ASPEED KCS devices
From: Andrew Jeffery <hidden>
Date: 2021-02-19 14:31:29
Also in:
linux-arm-kernel, linux-devicetree, linux-gpio, lkml, openbmc
Subsystem:
ipmi subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Corey Minyard, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Allocating IO and IRQ resources to LPC devices is in-theory an operation for the host, however ASPEED don't appear to expose this capability outside the BMC (e.g. SuperIO). Instead, we are left with BMC-internal registers for managing these resources, so introduce a devicetree property for KCS devices to describe SerIRQ properties. Signed-off-by: Andrew Jeffery <redacted> --- .../bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
index 1c1cc4265948..808475a2c2ca 100644
--- a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
+++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml@@ -47,6 +47,18 @@ properties: channels the status address is derived from the data address, but the status address may be optionally provided. + aspeed,lpc-interrupts: + $ref: "/schemas/types.yaml#/definitions/uint32-matrix" + minItems: 1 + maxItems: 1 + description: | + A 2-cell property expressing the LPC SerIRQ number and the interrupt + level/sense encoding (specified in the standard fashion). + + Note that the generated interrupt is issued from the BMC to the host, and + thus the target interrupt controller is not captured by the BMC's + devicetree. + kcs_chan: deprecated: true $ref: '/schemas/types.yaml#/definitions/uint32'
@@ -84,9 +96,11 @@ allOf: examples: - | + #include <dt-bindings/interrupt-controller/irq.h> kcs3: kcs at 24 { compatible = "aspeed,ast2600-kcs-bmc"; reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>; aspeed,lpc-io-reg = <0xca2>; + aspeed,lpc-interrupts = <11 IRQ_TYPE_LEVEL_LOW>; interrupts = <8>; };
--
2.27.0