[PATCH 1/2] dt-bindings: interrupt-controller: mpm: Allow passing reg through phandle

[Konrad Dybcio <konrad.dybcio@linaro.org>]

Due to the wild nature of the Qualcomm RPM Message RAM, we can't really
use 'reg' to point to the MPM's slice of Message RAM without cutting into
an already-defined RPM MSG RAM node used for GLINK and SMEM.

Document passing the register space as a slice of SRAM through the
qcom,rpm-msg-ram property. This also makes 'reg' no longer required.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 .../devicetree/bindings/interrupt-controller/qcom,mpm.yaml          | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml b/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
index 509d20c091af..77fe5e0b378f 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
@@ -30,6 +30,11 @@ properties:
     description:
       Specifies the base address and size of vMPM registers in RPM MSG RAM.
 
+  qcom,rpm-msg-ram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the APSS MPM slice of the RPM Message RAM
+
   interrupts:
     maxItems: 1
     description:
@@ -64,7 +69,6 @@ properties:
 
 required:
   - compatible
-  - reg
   - interrupts
   - mboxes
   - interrupt-controller

-- 
2.40.0