Re: [PATCH v8 1/9] arm64: dts: ti: k3-am62a-phycore-som: Fix wkup R5F memory region size

[Bryan Brattlof <bb@ti.com>]

On September  3, 2026 thus sayeth Markus Schneider-Pargmann (TI):
> The wkup_r5fss0_core0_memory_region was reserved with only
> 0x0f00000 but the MCU SDK linker for the wkup R5F firmware on
> AM62A defines the DM code/data DDR footprint differently:
> 
>     /* DDR for DM R5F code/data [ size 27 MiB + 364 KB ] */
>     DDR                         : ORIGIN = 0x9CAA5000 LENGTH = 0x1B5B000
> 
> which results in an end at 0x9e600000. For this memory region which
> starts at 0x9c900000 this means a length of:
> 
>     0x9e600000 - 0x9c900000 = 0x1d00000
> 
> AM62A additionally has a second DM firmware for edgeai whose highest
> section end address reaches 0x9e700000, so the region should end there:
> 
>     0x9e700000 - 0x9c900000 = 0x1e00000
> 
> Link: https://github.com/TexasInstruments/mcupsdk-core-k3/blob/k3_main/examples/drivers/ipc/ipc_rpmsg_echo_linux/am62ax-sk/r5fss0-0_freertos/ti-arm-clang/linker.cmd
> Fixes: 8dd0ac27fcd1 ("arm64: dts: ti: k3-am62a-phycore-som: Enable Co-processors")
> Signed-off-by: Markus Schneider-Pargmann (TI) <msp@baylibre.com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> index de4048a3564b..53c096da68b5 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> @@ -67,7 +67,7 @@ wkup_r5fss0_core0_dma_memory_region: memory@9c800000 {
>  
>  		wkup_r5fss0_core0_memory_region: memory@9c900000 {
>  			compatible = "shared-dma-pool";
> -			reg = <0x00 0x9c900000 0x00 0xf00000>;
> +			reg = <0x00 0x9c900000 0x00 0x1e00000>;

Lame. It stinks the MCU+SDK stuff needed to expand and we now need to 
worry about these things every MCU+ release :/

Reviewed-by: Bryan Brattlof <bb@ti.com>

~Bryan