Add support for the BAM-DMUX WWAN modem data path on Shikra.

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

@@ -23,6 +23,22 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	bam_dmux: bam-dmux {
+		compatible = "qcom,bam-dmux";
+
+		interrupts-extended = <&modem_smsm 1 IRQ_TYPE_EDGE_BOTH>,
+				      <&modem_smsm 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";
+	};
+
 	clocks {
 		xo_board: xo-board {
 			compatible = "fixed-clock";
@@ -485,6 +501,28 @@
 		};
 	};
 
+	smsm {
+		compatible = "qcom,smsm";
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mboxes = <0>, <&apcs_glb 13>;
+
+		apps_smsm: apps@0 {
+			reg = <0>;
+			#qcom,smem-state-cells = <1>;
+		};
+
+		modem_smsm: modem@1 {
+			reg = <1>;
+			interrupts = <GIC_SPI 69 IRQ_TYPE_EDGE_RISING 0>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
 	soc: soc@0 {
 		compatible = "simple-bus";
 
@@ -2068,6 +2106,18 @@
 			};
 		};
 
+		bam_dmux_dma: dma-controller@6044000 {
+			compatible = "qcom,bam-v1.7.0";
+			reg = <0x0 0x06044000 0x0 0x19000>;
+			interrupts = <GIC_SPI 74 IRQ_TYPE_EDGE_RISING 0>;
+			#dma-cells = <1>;
+			qcom,ee = <0>;
+
+			num-channels = <6>;
+			qcom,num-ees = <1>;
+			qcom,powered-remotely;
+		};
+
 		remoteproc_mpss: remoteproc@6080000 {
 			compatible = "qcom,shikra-mpss-pas";
 			reg = <0x0 0x06080000 0x0 0x100>;

arch/arm64/configs/defconfig

@@ -457,6 +457,7 @@ CONFIG_WLCORE_SDIO=m
 CONFIG_WWAN=m
 CONFIG_MHI_WWAN_CTRL=m
 CONFIG_MHI_WWAN_MBIM=m
+CONFIG_QCOM_BAM_DMUX=m
 CONFIG_INPUT_EVDEV=y
 CONFIG_KEYBOARD_ADC=m
 CONFIG_KEYBOARD_GPIO=y

drivers/dma/qcom/bam_dma.c

@@ -1373,7 +1373,7 @@ static int bam_dma_probe(struct platform_device *pdev)
 		bam_channel_init(bdev, &bdev->channels[i], i);
 
 	ret = devm_request_irq(bdev->dev, bdev->irq, bam_dma_irq,
-			IRQF_TRIGGER_HIGH, "bam_dma", bdev);
+			IRQF_TRIGGER_NONE, "bam_dma", bdev);
 	if (ret)
 		goto err_bam_channel_exit;
 

drivers/soc/qcom/smsm.c

@@ -54,7 +54,7 @@
  * Default sizes, in case SMEM_SMSM_SIZE_INFO is not found.
  */
 #define SMSM_DEFAULT_NUM_ENTRIES	8
-#define SMSM_DEFAULT_NUM_HOSTS		3
+#define SMSM_DEFAULT_NUM_HOSTS		5
 
 struct smsm_entry;
 struct smsm_host;