Re: [PATCH v9 9/9] arm64: dts: ti: Add wkup R5F nodes to pre-ram bootphase
From: Stefano Radaelli
Date: Fri Sep 18 2026 - 08:01:42 EST
On Fri, Sep 18, 2026 at 11:17:53AM +0200, Markus Schneider-Pargmann (TI) wrote:
> For IO+DDR the wkup_r5fss0_core0 and the
> wkup_r5fss0_core0_lpm_metadata_region need to be accessed before RAM
> setup is done. These are used to read the lpm metadata region in
> which data is stored to resume. This needs to be done before RAM is
> in use to avoid overwriting data.
>
> Add the bootph-pre-ram flag to the wkup_r5fss0_core0 node in both
> ipc-firmware dtsi files and to the lpm metadata region nodes of the
> AM62A and AM62P boards.
>
> The board level bootph-pre-ram flag of k3-am62d2-evm.dts becomes
> redundant with the dtsi-wide flag and is dropped.
>
> Signed-off-by: Markus Schneider-Pargmann (TI) <msp@xxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi | 1 +
> arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi | 1 +
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 1 +
> arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 4 ----
> arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi | 1 +
> arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi | 1 +
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 1 +
> arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi | 1 +
> 8 files changed, 7 insertions(+), 4 deletions(-)
>
> 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 7fa19ced1a23..12be777a35ca 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi
> @@ -80,6 +80,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 {
> wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 {
> compatible = "shared-dma-pool";
> reg = <0x00 0x9ca08000 0x00 0x1000>;
> + bootph-pre-ram;
> no-map;
> };
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi
> index 94c1d60d8d7a..7beca54e75ee 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi
> @@ -63,6 +63,7 @@ &wkup_r5fss0 {
> };
>
> &wkup_r5fss0_core0 {
> + bootph-pre-ram;
> mboxes = <&mailbox0_cluster0>, <&mbox_r5_0>;
> memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
> <&wkup_r5fss0_core0_ipc_region>,
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> index 871ec227def9..fe75f6b6b50b 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> @@ -74,6 +74,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 {
> wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 {
> compatible = "shared-dma-pool";
> reg = <0x00 0x9ca08000 0x00 0x1000>;
> + bootph-pre-ram;
> no-map;
> };
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
> index 7cba3ff99e6a..f87d6d515e2b 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
> @@ -800,10 +800,6 @@ partition@3fc0000 {
> };
> };
>
> -&wkup_r5fss0_core0 {
> - bootph-pre-ram;
> -};
> -
> &mcu_r5fss0_core0 {
> firmware-name = "am62d-mcu-r5f0_0-fw";
> };
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi
> index 84dfbfd1986c..277d7e268cfe 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p-ti-ipc-firmware.dtsi
> @@ -42,6 +42,7 @@ &wkup_r5fss0 {
> };
>
> &wkup_r5fss0_core0 {
> + bootph-pre-ram;
> mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
> memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
> <&wkup_r5fss0_core0_ipc_region>,
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
> index 45ab9d947b3a..62a518dbbdbe 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p-verdin.dtsi
> @@ -183,6 +183,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 {
> wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 {
> compatible = "shared-dma-pool";
> reg = <0x00 0x9ca08000 0x00 0x1000>;
> + bootph-pre-ram;
> no-map;
> };
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> index bb027c65eddd..39af098e4db2 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> @@ -70,6 +70,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 {
> wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 {
> compatible = "shared-dma-pool";
> reg = <0x00 0x9ca08000 0x00 0x1000>;
> + bootph-pre-ram;
> no-map;
> };
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
> index 31f670fdd91d..2eefbd8d47a4 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
> @@ -84,6 +84,7 @@ wkup_r5fss0_core0_lpm_fs_stub_region: r5f-memory@9ca00000 {
> wkup_r5fss0_core0_lpm_metadata_region: r5f-memory@9ca08000 {
> compatible = "shared-dma-pool";
> reg = <0x00 0x9ca08000 0x00 0x1000>;
> + bootph-pre-ram;
> no-map;
> };
>
>
> --
> 2.55.0
>
Reviewed-by: Stefano Radaelli <stefano.r@xxxxxxxxxxxxx>
Best Regards,
Stefano