Merge tag 'qcom-arm64-fixes-for-6.4-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into arm/fixes

One last Qualcomm ARM64 DeviceTree fix for v6.4

Changes related to cache management for DMA memory caused WiFi to stop
work on SC7180 and SC7280 based products, using TF-A. These changes
marks the relevant device dma-coherent to correct the behavior.

* tag 'qcom-arm64-fixes-for-6.4-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  arm64: dts: qcom: sc7280: Mark SCM as dma-coherent for chrome devices
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for trogdor
  arm64: dts: qcom: sc7180: Mark SCM as dma-coherent for IDP
  dt-bindings: firmware: qcom,scm: Document that SCM can be dma-coherent

Link: https://lore.kernel.org/r/20230622203248.106422-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: arndb

Documentation/devicetree/bindings/firmware/qcom,scm.yaml

@@ -71,6 +71,8 @@ properties:
     minItems: 1
     maxItems: 3
 
+  dma-coherent: true
+
   interconnects:
     maxItems: 1
 

arch/arm64/boot/dts/qcom/sc7180-idp.dts

@@ -393,6 +393,11 @@
 	qcom,spare-regs = <&tcsr_regs_2 0xb3e4>;
 };
 
+&scm {
+	/* TF-A firmware maps memory cached so mark dma-coherent to match. */
+	dma-coherent;
+};
+
 &sdhc_1 {
 	status = "okay";
 

arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi

@@ -892,6 +892,11 @@ hp_i2c: &i2c9 {
 	qcom,spare-regs = <&tcsr_regs_2 0xb3e4>;
 };
 
+&scm {
+	/* TF-A firmware maps memory cached so mark dma-coherent to match. */
+	dma-coherent;
+};
+
 &sdhc_1 {
 	status = "okay";
 

arch/arm64/boot/dts/qcom/sc7180.dtsi

@@ -369,7 +369,7 @@
 	};
 
 	firmware {
-		scm {
+		scm: scm {
 			compatible = "qcom,scm-sc7180", "qcom,scm";
 		};
 	};

arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi

@@ -79,6 +79,11 @@
 	firmware-name = "ath11k/WCN6750/hw1.0/wpss.mdt";
 };
 
+&scm {
+	/* TF-A firmware maps memory cached so mark dma-coherent to match. */
+	dma-coherent;
+};
+
 &wifi {
 	status = "okay";
 

arch/arm64/boot/dts/qcom/sc7280.dtsi

@@ -656,7 +656,7 @@
 	};
 
 	firmware {
-		scm {
+		scm: scm {
 			compatible = "qcom,scm-sc7280", "qcom,scm";
 		};
 	};