linux-kernel - [PATCH v2 1/3] dt-bindings: ath10k: Add wifi-firmware subnode for wifi node

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Message-Id: <1585134100-5944-2-git-send-email-pillair@codeaurora.org>
Date:   Wed, 25 Mar 2020 16:31:38 +0530
From:   Rakesh Pillai <pillair@...eaurora.org>
To:     ath10k@...ts.infradead.org
Cc:     linux-wireless@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rakesh Pillai <pillair@...eaurora.org>
Subject: [PATCH v2 1/3] dt-bindings: ath10k: Add wifi-firmware subnode for wifi node

Add a wifi-firmware subnode for the wifi node.
This wifi-firmware subnode is needed for the
targets which do not support TrustZone.

Signed-off-by: Rakesh Pillai <pillair@...eaurora.org>
---
 .../devicetree/bindings/net/wireless/qcom,ath10k.txt       | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
index 71bf91f..65ee68e 100644
--- a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
+++ b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
@@ -96,6 +96,17 @@ Optional properties:
 - qcom,coexist-gpio-pin : gpio pin number  information to support coex
 			  which will be used by wifi firmware.
 
+* Subnodes
+The ath10k wifi node can contain one optional firmware subnode.
+Firmware subnode is needed when the platform does not have TustZone.
+The firmware subnode must have:
+
+- iommus:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: A list of phandle and IOMMU specifier pairs.
+
+
 Example (to supply PCI based wifi block details):
 
 In this example, the node is defined as child node of the PCI controller.
@@ -196,4 +207,7 @@ wifi@...00000 {
 		memory-region = <&wifi_msa_mem>;
 		iommus = <&apps_smmu 0x0040 0x1>;
 		qcom,msa-fixed-perm;
+		wifi-firmware {
+			iommus = <&apps_iommu 0xc22 0x1>;
+		};
 };
-- 
2.7.4