arm64: dts: add the rpmsg and enable rpmsg audio on imx8mn

Enable the RPMSG on iMX8MN DDR4 EVK platform, and verify the rpmsg
audio feature.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>

3 files changed, 125 insertions, 1 deletions

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index c1f2ee97203d..3cbb6fa13830 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -25,7 +25,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-evk.dtb imx8mm-evk-rpmsg.dtb imx8mm-evk-rm67191
 			  imx8mm-ddr4-evk.dtb imx8mm-evk-root.dtb imx8mm-evk-inmate.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-evk-ak4497.dtb imx8mm-evk-ak5558.dtb imx8mm-evk-audio-tdm.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-evk.dtb imx8mn-ddr4-evk.dtb imx8mn-ddr4-evk-ak5558.dtb \
-			  imx8mn-ddr4-evk-rm67191.dtb
+			  imx8mn-ddr4-evk-rm67191.dtb imx8mn-ddr4-evk-rpmsg.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-ddr4-evk-root.dtb imx8mn-ddr4-evk-inmate.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mq-evk.dtb imx8mq-evk-rpmsg.dtb imx8mq-evk-pcie1-m2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mq-evk-ak4497.dtb imx8mq-evk-audio-tdm.dtb imx8mq-evk-pdm.dtb
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk-rpmsg.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk-rpmsg.dts
new file mode 100644
index 000000000000..de2e1d09a51d
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk-rpmsg.dts
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2019 NXP
+ */
+
+#include "imx8mn-ddr4-evk.dts"
+
+/ {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		m_core_reserved: m_core@0x80000000 {
+			no-map;
+			reg = <0 0x80000000 0 0x1000000>;
+		};
+
+		rpmsg_reserved: rpmsg@0xb8000000 {
+			no-map;
+			reg = <0 0xb8000000 0 0x400000>;
+		};
+	};
+
+	sound-wm8524 {
+		status = "disabled";
+	};
+
+	wm8524: audio-codec {
+		status = "disabled";
+	};
+
+	rpmsg_i2s: rpmsg-i2s {
+		compatible = "fsl,imx8mn-rpmsg-i2s";
+		/* the audio device index in m4 domain */
+		fsl,audioindex = <0> ;
+		fsl,dma-buffer-size = <0x6000000>;
+		fsl,enable-lpa;
+		status = "okay";
+	};
+
+	sound-rpmsg {
+		compatible = "fsl,imx-audio-rpmsg";
+		model = "wm8524-audio";
+		cpu-dai = <&rpmsg_i2s>;
+		rpmsg-out;
+	};
+};
+
+&clk {
+	init-on-array = <
+	IMX8MN_CLK_UART4_ROOT
+	>;
+};
+
+/*
+ * ATTENTION: M core may use IPs like below
+ * ECSPI2, GPIO1/GPIO5, GPT1, I2C3, I2S3, WDOG1, UART4, PWM3, SDMA1/3 and PDM
+ */
+
+&ecspi2 {
+	status = "disabled";
+};
+
+&i2c3 {
+	status = "disabled";
+};
+
+&pwm3 {
+	status = "disabled";
+};
+
+&rpmsg{
+	/*
+	 * 64K for one rpmsg instance:
+	 * --0xb8000000~0xb800ffff: pingpong
+	 */
+	vdev-nums = <1>;
+	reg = <0x0 0xb8000000 0x0 0x10000>;
+	status = "okay";
+};
+
+&sai3 {
+	status = "disabled";
+};
+
+&uart4 {
+	status = "disabled";
+};
+
+&wdog1 {
+	status = "disabled";
+};
+
+&sdma1{
+	status = "disabled";
+};
+
+&sdma3 {
+	status = "disabled";
+};
diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index df89b2eb9e0f..c361b19b6764 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -794,6 +794,15 @@
 				status = "disabled";
 			};
 
+			mu: mu@30aa0000 {
+				compatible = "fsl,imx8mq-mu", "fsl,imx6sx-mu";
+				reg = <0x30aa0000 0x10000>;
+				interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MN_CLK_MU_ROOT>;
+				clock-names = "mu";
+				#mbox-cells = <2>;
+			};
+
 			usdhc1: mmc@30b40000 {
 				compatible = "fsl,imx8mn-usdhc", "fsl,imx7d-usdhc";
 				reg = <0x30b40000 0x10000>;
@@ -1063,6 +1072,20 @@
 		};
 	};
 
+	rpmsg: rpmsg{
+		compatible = "fsl,imx8mq-rpmsg";
+		/* up to now, the following channels are used in imx rpmsg
+		 * - tx1/rx1: messages channel.
+		 * - general interrupt1: remote proc finish re-init rpmsg stack
+		 *   when A core is partition reset.
+		 */
+		mbox-names = "tx", "rx", "rxdb";
+		mboxes = <&mu 0 1
+			  &mu 1 1
+			  &mu 3 1>;
+		status = "disabled";
+	};
+
 	usbphynop1: usbphynop1 {
 		compatible = "usb-nop-xceiv";
 		clocks = <&clk IMX8MN_CLK_USB_PHY_REF>;