linux-kernel - [PATCH v4 10/13] ARM: dts: qcom: msm8226: Add BAM DMUX Ethernet/IP device

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Message-Id: <20250129-msm8226-modem-v4-10-2b02ed7b7f1c@lucaweiss.eu>
Date: Wed, 29 Jan 2025 00:35:42 +0100
From: Luca Weiss <luca@...aweiss.eu>
To: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 Bjorn Andersson <andersson@...nel.org>, 
 Mathieu Poirier <mathieu.poirier@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Stephan Gerhold <stephan@...hold.net>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 Matti Lehtimäki <matti.lehtimaki@...il.com>
Cc: linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Luca Weiss <luca@...aweiss.eu>, 
 Stephan Gerhold <stephan.gerhold@...aro.org>
Subject: [PATCH v4 10/13] ARM: dts: qcom: msm8226: Add BAM DMUX Ethernet/IP
 device

BAM DMUX is used as the network interface to the modem.

Reviewed-by: Stephan Gerhold <stephan.gerhold@...aro.org>
Signed-off-by: Luca Weiss <luca@...aweiss.eu>
---
 arch/arm/boot/dts/qcom/qcom-msm8226.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/qcom/qcom-msm8226.dtsi b/arch/arm/boot/dts/qcom/qcom-msm8226.dtsi
index 55bb070dcf489064f5b14902da1acd2762232ef9..1091eb13576c1cce1821a9200d4c344387851583 100644
--- a/arch/arm/boot/dts/qcom/qcom-msm8226.dtsi
+++ b/arch/arm/boot/dts/qcom/qcom-msm8226.dtsi
@@ -916,6 +916,18 @@ spmi_bus: spmi@...cf000 {
 			#interrupt-cells = <4>;
 		};
 
+		bam_dmux_dma: dma-controller@...34000 {
+			compatible = "qcom,bam-v1.4.0";
+			reg = <0xfc834000 0x7000>;
+			interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
+			#dma-cells = <1>;
+			qcom,ee = <0>;
+
+			num-channels = <6>;
+			qcom,num-ees = <1>;
+			qcom,powered-remotely;
+		};
+
 		modem: remoteproc@...80000 {
 			compatible = "qcom,msm8226-mss-pil";
 			reg = <0xfc880000 0x100>,
@@ -951,6 +963,20 @@ modem: remoteproc@...80000 {
 
 			status = "disabled";
 
+			bam_dmux: bam-dmux {
+				compatible = "qcom,bam-dmux";
+
+				interrupt-parent = <&modem_smsm>;
+				interrupts = <1 IRQ_TYPE_EDGE_BOTH>, <11 IRQ_TYPE_EDGE_BOTH>;
+				interrupt-names = "pc", "pc-ack";
+
+				qcom,smem-states = <&apps_smsm 1>, <&apps_smsm 11>;
+				qcom,smem-state-names = "pc", "pc-ack";
+
+				dmas = <&bam_dmux_dma 4>, <&bam_dmux_dma 5>;
+				dma-names = "tx", "rx";
+			};
+
 			smd-edge {
 				interrupts = <GIC_SPI 25 IRQ_TYPE_EDGE_RISING>;
 

-- 
2.48.1