Re: [PATCH 1/2] arm64: dts: ti: k3-am62p: Add MCU SRAM node

[Kumar, Udit]

On 9/28/2026 8:52 AM, Sai Sree Kartheek Adivi wrote:
> From: Hari Nagalla <hnagalla@xxxxxx>
> 
> AM62P devices have two banks of 256KB each SRAM in MCU domain. This
> memory is typically used by MCU R5 firmware for low latency accesses.
> 

> Signed-off-by: Hari Nagalla <hnagalla@xxxxxx>
> Signed-off-by: Judith Mendez <jm@xxxxxx>
> Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@xxxxxx>
> ---
>  .../arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi
> index 2394a4fb5a94c..278404cadcd98 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-mcu.dtsi
> @@ -6,6 +6,18 @@
>   */
>  
>  &cbass_mcu {
> +	mcu_ram: sram@79100000 {
> +		compatible = "mmio-sram";
> +		reg = <0x00 0x79100000 0x00 0x80000>;
> +		ranges = <0x00 0x00 0x79100000 0x80000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +

commit message says, 2 banks of 256Kb, Here you have only 1 block.
Please add description, why you are adding 1 block only

> +		mcu1-sram@0 {
> +			reg = <0x0 0x80000>;
> +		};

what is use of this ?,

If you really need this then, please make it block of 256Kb (something
like below)

mcu-sram-0 {
 			reg = <0x0 0x40000>;
 		};

mcu-sram-1 {
			reg = <0x40000 0x40000>;
		};


> +	};
> +
>  	mcu_pmx0: pinctrl@4084000 {
>  		compatible = "pinctrl-single";
>  		reg = <0x00 0x04084000 0x00 0x88>;