linux-kernel - [PATCH v8 4/4] arm64: dts: ti: k3-am62: Add M4F remoteproc node

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Date: Wed, 24 Apr 2024 14:06:12 -0500
From: Andrew Davis <afd@...com>
To: 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>, Nishanth
 Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo
	<kristo@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Hari Nagalla
	<hnagalla@...com>
CC: <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Andrew Davis <afd@...com>
Subject: [PATCH v8 4/4] arm64: dts: ti: k3-am62: Add M4F remoteproc node

From: Hari Nagalla <hnagalla@...com>

The AM62x SoCs of the TI K3 family have a Cortex M4F core in the MCU
domain. This core can be used by non safety applications as a remote
processor. When used as a remote processor with virtio/rpmessage IPC,
two carveout reserved memory nodes are needed. The first region is used
as a DMA pool for the rproc device, and the second region will furnish
the static carveout regions for the firmware memory.

The current carveout addresses and sizes are defined statically for
each rproc device. The M4F processor do not have an MMU, and as such
require the exact memory used by the firmware to be set-aside.

Signed-off-by: Hari Nagalla <hnagalla@...com>
Signed-off-by: Andrew Davis <afd@...com>
---
 arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi        | 12 ++++++++++++
 arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 18 ++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
index e66d486ef1f21..0c6ee801f35fc 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
@@ -173,4 +173,16 @@ mcu_mcan1: can@...8000 {
 		bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
 		status = "disabled";
 	};
+
+	mcu_m4fss: m4fss@...0000 {
+		compatible = "ti,am64-m4fss";
+		reg = <0x00 0x5000000 0x00 0x30000>,
+		<0x00 0x5040000 0x00 0x10000>;
+		reg-names = "iram", "dram";
+		ti,sci = <&dmsc>;
+		ti,sci-dev-id = <9>;
+		ti,sci-proc-ids = <0x18 0xff>;
+		resets = <&k3_reset 9 1>;
+		firmware-name = "am62-mcu-m4f0_0-fw";
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
index 3c45782ab2b78..bda9fb2e33eec 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
@@ -48,6 +48,18 @@ ramoops@...00000 {
 			pmsg-size = <0x8000>;
 		};
 
+		mcu_m4fss_dma_memory_region: m4f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9cb00000 0x00 0x100000>;
+			no-map;
+		};
+
+		mcu_m4fss_memory_region: m4f-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9cc00000 0x00 0xe00000>;
+			no-map;
+		};
+
 		secure_tfa_ddr: tfa@...80000 {
 			reg = <0x00 0x9e780000 0x00 0x80000>;
 			alignment = <0x1000>;
@@ -457,6 +469,12 @@ mbox_m4_0: mbox-m4-0 {
 	};
 };
 
+&mcu_m4fss {
+	mboxes = <&mailbox0_cluster0>, <&mbox_m4_0>;
+	memory-region = <&mcu_m4fss_dma_memory_region>,
+			<&mcu_m4fss_memory_region>;
+};
+
 &usbss0 {
 	bootph-all;
 	status = "okay";
-- 
2.39.2