For every remote processor, set up dedicated memory regions and
associate the required mailbox channels. Allocate two memory areas
per remote core: one 1MB region for vring shared buffers, and
another for external memory used by the remote processor for its
resource table and trace buffer.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 .../boot/dts/ti/k3-am62-phycore-som.dtsi      | 35 +++++++++++++++----
 1 file changed, 29 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
index 2ef4cbaec789..71d165a7abe0 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
@@ -57,6 +57,18 @@ mcu_m4fss_memory_region: m4f-memory@9cc00000 {
 			no-map;
 		};
 
+		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9da00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9da00000 0x00 0x100000>;
+			no-map;
+		};
+
+		wkup_r5fss0_core0_memory_region: r5f-memory@9db00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x9db00000 0x00 0xc00000>;
+			no-map;
+		};
+
 		secure_tfa_ddr: tfa@9e780000 {
 			reg = <0x00 0x9e780000 0x00 0x80000>;
 			alignment = <0x1000>;
@@ -68,12 +80,6 @@ secure_ddr: optee@9e800000 {
 			alignment = <0x1000>;
 			no-map;
 		};
-
-		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9db00000 {
-			compatible = "shared-dma-pool";
-			reg = <0x00 0x9db00000 0x00 0x00c00000>;
-			no-map;
-		};
 	};
 
 	vcc_5v0_som: regulator-vcc-5v0-som {
@@ -226,10 +232,17 @@ cpsw3g_phy1: ethernet-phy@1 {
 };
 
 &mailbox0_cluster0 {
+	status = "okay";
+
 	mbox_m4_0: mbox-m4-0 {
 		ti,mbox-rx = <0 0 0>;
 		ti,mbox-tx = <1 0 0>;
 	};
+
+	mbox_r5_0: mbox-r5-0 {
+		ti,mbox-rx = <2 0 0>;
+		ti,mbox-tx = <3 0 0>;
+	};
 };
 
 &main_i2c0 {
@@ -365,3 +378,13 @@ &sdhci0 {
 	non-removable;
 	status = "okay";
 };
+
+&wkup_r5fss0 {
+	status = "okay";
+};
+
+&wkup_r5fss0_core0 {
+	mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
+	memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
+			<&wkup_r5fss0_core0_memory_region>;
+};
-- 
2.25.1

On 5/6/25 6:54 AM, Daniel Schultz wrote:
> For every remote processor, set up dedicated memory regions and
> associate the required mailbox channels. Allocate two memory areas
> per remote core: one 1MB region for vring shared buffers, and
> another for external memory used by the remote processor for its
> resource table and trace buffer.
> 
> Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
> ---

Reviewed-by: Andrew Davis <afd@ti.com>

>   .../boot/dts/ti/k3-am62-phycore-som.dtsi      | 35 +++++++++++++++----
>   1 file changed, 29 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> index 2ef4cbaec789..71d165a7abe0 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> @@ -57,6 +57,18 @@ mcu_m4fss_memory_region: m4f-memory@9cc00000 {
>   			no-map;
>   		};
>   
> +		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9da00000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x00 0x9da00000 0x00 0x100000>;
> +			no-map;
> +		};
> +
> +		wkup_r5fss0_core0_memory_region: r5f-memory@9db00000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x00 0x9db00000 0x00 0xc00000>;
> +			no-map;
> +		};
> +
>   		secure_tfa_ddr: tfa@9e780000 {
>   			reg = <0x00 0x9e780000 0x00 0x80000>;
>   			alignment = <0x1000>;
> @@ -68,12 +80,6 @@ secure_ddr: optee@9e800000 {
>   			alignment = <0x1000>;
>   			no-map;
>   		};
> -
> -		wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory@9db00000 {
> -			compatible = "shared-dma-pool";
> -			reg = <0x00 0x9db00000 0x00 0x00c00000>;
> -			no-map;
> -		};
>   	};
>   
>   	vcc_5v0_som: regulator-vcc-5v0-som {
> @@ -226,10 +232,17 @@ cpsw3g_phy1: ethernet-phy@1 {
>   };
>   
>   &mailbox0_cluster0 {
> +	status = "okay";
> +
>   	mbox_m4_0: mbox-m4-0 {
>   		ti,mbox-rx = <0 0 0>;
>   		ti,mbox-tx = <1 0 0>;
>   	};
> +
> +	mbox_r5_0: mbox-r5-0 {
> +		ti,mbox-rx = <2 0 0>;
> +		ti,mbox-tx = <3 0 0>;
> +	};
>   };
>   
>   &main_i2c0 {
> @@ -365,3 +378,13 @@ &sdhci0 {
>   	non-removable;
>   	status = "okay";
>   };
> +
> +&wkup_r5fss0 {
> +	status = "okay";
> +};
> +
> +&wkup_r5fss0_core0 {
> +	mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
> +	memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
> +			<&wkup_r5fss0_core0_memory_region>;
> +};