linux-kernel - [PATCH V2 07/10] arm64: dts: imx8ulp-evk: enable CM33 node

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Date:   Mon, 24 Jul 2023 15:58:30 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V2 07/10] arm64: dts: imx8ulp-evk: enable CM33 node

From: Peng Fan <peng.fan@....com>

Enable CM33 node to support rpmsg feature. To use rpmsg, also need
to enable mu node for mailbox doorbell and reserved memory node
for vring, and data buffer. And reserved a piece DRAM memory for case
that m33 images loaded in DRAM.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
index e171390a1888..d66e31cf83fe 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
@@ -31,6 +31,42 @@ linux,cma {
 			size = <0 0x28000000>;
 			linux,cma-default;
 		};
+
+		m33_reserved: noncacheable-section@...00000 {
+			reg = <0 0xa8600000 0 0x1000000>;
+			no-map;
+		};
+
+		rsc_table: rsc-table@...f8000{
+			reg = <0 0x1fff8000 0 0x1000>;
+			no-map;
+		};
+
+		vdev0vring0: vdev0vring0@...00000 {
+			reg = <0 0xaff00000 0 0x8000>;
+			no-map;
+		};
+
+		vdev0vring1: vdev0vring1@...08000 {
+			reg = <0 0xaff08000 0 0x8000>;
+			no-map;
+		};
+
+		vdev1vring0: vdev1vring0@...10000 {
+			reg = <0 0xaff10000 0 0x8000>;
+			no-map;
+		};
+
+		vdev1vring1: vdev1vring1@...18000 {
+			reg = <0 0xaff18000 0 0x8000>;
+			no-map;
+		};
+
+		vdevbuffer: vdevbuffer@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0xa8400000 0 0x100000>;
+			no-map;
+		};
 	};
 
 	clock_ext_rmii: clock-ext-rmii {
@@ -49,6 +85,16 @@ clock_ext_ts: clock-ext-ts {
 	};
 };
 
+&cm33 {
+	mbox-names = "tx", "rx", "rxdb";
+	mboxes = <&mu 0 1>,
+		 <&mu 1 1>,
+		 <&mu 3 1>;
+	memory-region = <&vdevbuffer>, <&vdev0vring0>, <&vdev0vring1>,
+			<&vdev1vring0>, <&vdev1vring1>, <&rsc_table>;
+	status = "okay";
+};
+
 &lpuart5 {
 	/* console */
 	pinctrl-names = "default", "sleep";
@@ -92,6 +138,10 @@ ethphy: ethernet-phy@1 {
 	};
 };
 
+&mu {
+	status = "okay";
+};
+
 &iomuxc1 {
 	pinctrl_enet: enetgrp {
 		fsl,pins = <
-- 
2.37.1