ARM: dts: qcom: msm8974: Add BAM DMUX Ethernet/IP device

BAM DMUX is used as the network interface to the modem.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220517203450.1155696-1-luca@z3ntu.xyz

arch/arm/boot/dts/qcom-msm8974.dtsi

@@ -1146,6 +1146,18 @@ spmi_bus: spmi@fc4cf000 {
 			#interrupt-cells = <4>;
 		};
 
+		bam_dmux_dma: dma-controller@fc834000 {
+			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;
+		};
+
 		remoteproc_mss: remoteproc@fc880000 {
 			compatible = "qcom,msm8974-mss-pil";
 			reg = <0xfc880000 0x100>, <0xfc820000 0x020>;
@@ -1180,6 +1192,20 @@ mpss {
 				memory-region = <&mpss_region>;
 			};
 
+			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>;