Re: [PATCH 3/4] dt: bindings: add bindings for wifi iommu node

On 2018-09-25 04:23, Rob Herring wrote:

On Fri, Sep 21, 2018 at 02:39:06PM +0530, Govind Singh wrote:

quoted

WCN3990 wifi module can optionally make use of the IOMMU.

Can the other compatibles use IOMMU too?

No, only wcn3990 can optionally use IOMMU.

quoted

Add binding documentation for phandle to the IOMMU and
the stream id of wifi iommu block.

Signed-off-by: Govind Singh <redacted>
---
 .../devicetree/bindings/net/wireless/qcom,ath10k.txt         | 5 
+++++
 1 file changed, 5 insertions(+)

diff --git 

a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt 
b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
index 22dea7d83ee8..07e58008c665 100644

--- a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
+++ b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt

@@ -59,6 +59,10 @@ Optional properties:
 - <supply-name>-supply: handle to the regulator device tree node
 			   optional "supply-name" are "vdd-0.8-cx-mx",
 			   "vdd-1.8-xo", "vdd-1.3-rfa" and "vdd-3.3-ch0".
+- iommus:
+	Usage: optional
+	Value type: <prop-encoded-array>
+	Definition: A list of phandle and IOMMU specifier pairs.

 Example (to supply the calibration data alone):

@@ -157,4 +161,5 @@ wifi@18000000 {
 		vdd-1.8-xo-supply = <&vreg_l7a_1p8>;
 		vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
 		vdd-3.3-ch0-supply = <&vreg_l25a_3p3>;
+		iommus = <&apps_smmu 0x0040 0x1>;
 };
--

2.17.0

BR,
Govind