[PATCH v3 5/5] arm64: dts : ti: k3-j721s2-som-p0: Add DDR carveout memory nodes for C71x DSPs

[Apurva Nandan]

Two carveout reserved memory nodes each have been added for each of the
C71x DSP for the TI J721S2 EVM boards. These nodes are assigned to the
respective rproc device nodes as well. The first region will be used as
the 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
device. The C71x DSP processor supports a MMU called CMMU, but is not
currently supported and as such requires the exact memory used by the
firmware to be set-aside.

Signed-off-by: Hari Nagalla <hnagalla at ti.com>
Signed-off-by: Apurva Nandan <a-nandan at ti.com>
---
 arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi | 52 ++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi
index 970340ff2c0a..dcad372620b1 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi
@@ -102,6 +102,30 @@ main_r5fss1_core1_memory_region: r5f-memory at a5100000 {
 			no-map;
 		};
 
+		c71_0_dma_memory_region: c71-dma-memory at a6000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa6000000 0x00 0x100000>;
+			no-map;
+		};
+
+		c71_0_memory_region: c71-memory at a6100000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa6100000 0x00 0xf00000>;
+			no-map;
+		};
+
+		c71_1_dma_memory_region: c71-dma-memory at a7000000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa7000000 0x00 0x100000>;
+			no-map;
+		};
+
+		c71_1_memory_region: c71-memory at a7100000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa7100000 0x00 0xf00000>;
+			no-map;
+		};
+
 		rtos_ipc_memory_region: ipc-memories at a8000000 {
 			reg = <0x00 0xa8000000 0x00 0x01c00000>;
 			alignment = <0x1000>;
@@ -272,6 +296,20 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 {
 	};
 };
 
+&mailbox0_cluster4 {
+	status = "okay";
+	interrupts = <420>;
+	mbox_c71_0: mbox-c71-0 {
+		ti,mbox-rx = <0 0 0>;
+		ti,mbox-tx = <1 0 0>;
+	};
+
+	mbox_c71_1: mbox-c71-1 {
+		ti,mbox-rx = <2 0 0>;
+		ti,mbox-tx = <3 0 0>;
+	};
+};
+
 &mcu_r5fss0_core0 {
 	mboxes = <&mailbox0_cluster0>, <&mbox_mcu_r5fss0_core0>;
 	memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
@@ -307,3 +345,17 @@ &main_r5fss1_core1 {
 	memory-region = <&main_r5fss1_core1_dma_memory_region>,
 			<&main_r5fss1_core1_memory_region>;
 };
+
+&c71_0 {
+	status = "okay";
+	mboxes = <&mailbox0_cluster4>, <&mbox_c71_0>;
+	memory-region = <&c71_0_dma_memory_region>,
+			<&c71_0_memory_region>;
+};
+
+&c71_1 {
+	status = "okay";
+	mboxes = <&mailbox0_cluster4>, <&mbox_c71_1>;
+	memory-region = <&c71_1_dma_memory_region>,
+			<&c71_1_memory_region>;
+};
-- 
2.34.1