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[17/19] dt-bindings: ipmi: Add optional SerIRQ property to ASPEED KCS devices

Message ID 20210219142523.3464540-18-andrew@aj.id.au
State New
Headers show
Series ipmi: Allow raw access to KCS devices | expand

Commit Message

Andrew Jeffery Feb. 19, 2021, 2:25 p.m. UTC
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 <andrew@aj.id.au>
 .../bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml      | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
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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.
     deprecated: true
     $ref: '/schemas/types.yaml#/definitions/uint32'
@@ -84,9 +96,11 @@  allOf:
   - |
+    #include <dt-bindings/interrupt-controller/irq.h>
     kcs3: kcs@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>;