dt-bindings: net: add IPA iommus property

The IPA accesses "IMEM" and main system memory through an SMMU, so
its DT node requires an iommus property to define range of stream IDs
it uses.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/qcom,ipa.yaml b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
index 140f152456542d122b6a767c193aa6b0c0b4e710..7b749fc04c32cdd27648d0a33553f9ff9aa9502a 100644 (file)
--- a/Documentation/devicetree/bindings/net/qcom,ipa.yaml
+++ b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
@@ -20,7 +20,10 @@ description:
   The GSI is an integral part of the IPA, but it is logically isolated
   and has a distinct interrupt and a separately-defined address space.
 
-  See also soc/qcom/qcom,smp2p.txt and interconnect/interconnect.txt.
+  See also soc/qcom/qcom,smp2p.txt and interconnect/interconnect.txt.  See
+  iommu/iommu.txt and iommu/arm,smmu.yaml for more information about SMMU
+  bindings.
+
 
   - |
     --------             ---------
@@ -54,6 +57,9 @@ properties:
       - const: ipa-shared
       - const: gsi
 
+  iommus:
+    maxItems: 1
+
   clocks:
     maxItems: 1
 
@@ -126,6 +132,7 @@ properties:
 
 required:
   - compatible
+  - iommus
   - reg
   - clocks
   - interrupts
@@ -164,6 +171,7 @@ examples:
                 modem-init;
                 modem-remoteproc = <&mss_pil>;
 
+                iommus = <&apps_smmu 0x720 0x3>;
                 reg = <0 0x1e40000 0 0x7000>,
                         <0 0x1e47000 0 0x2000>,
                         <0 0x1e04000 0 0x2c000>;