[PATCH v3 4/7] arm64: dts: ti: k3-am62a7-sk: Split r5f memory region

Markus Schneider-Pargmann (TI)
2026-03-18T15:14:20Z

Split the firmware memory region in more specific parts so it is better
described where to find which information. Specifically the LPM metadata
region is important as bootloader software like U-Boot has to know where
that data is to be able to read that data.

Signed-off-by: Markus Schneider-Pargmann (TI) <msp@baylibre.com>
---
arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 40 +++++++++++++++++++++++++++++++--
1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index e99bdbc2e0cbdf858f1631096f9c2a086191bab3..c381cc33064ec427751a9ac5bcdff745a9559a89 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -59,9 +59,33 @@ wkup_r5fss0_core0_dma_memory_region: memory@9c800000 {
no-map;
};

- wkup_r5fss0_core0_memory_region: memory@9c900000 {
+ wkup_r5fss0_core0_ipc_region: memory@9c900000 {
compatible = "shared-dma-pool";
- reg = <0x00 0x9c900000 0x00 0xf00000>;
+ reg = <0x00 0x9c900000 0x00 0x100000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_lpm_fs_stub_region: memory@9ca00000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9ca00000 0x00 0x8000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_lpm_metadata_region: memory@9ca08000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9ca08000 0x00 0x1000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_lpm_rest_region: memory@9ca09000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9ca09000 0x00 0x97000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_dm_region: memory@9caa0000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9caa0000 0x00 0xd60000>;
no-map;
};

@@ -922,3 +946,15 @@ &mcu_uart0 {
};

#include "k3-am62a-ti-ipc-firmware.dtsi"
+
+&wkup_r5fss0_core0 {
+ memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
+ <&wkup_r5fss0_core0_ipc_region>,
+ <&wkup_r5fss0_core0_lpm_fs_stub_region>,
+ <&wkup_r5fss0_core0_lpm_metadata_region>,
+ <&wkup_r5fss0_core0_lpm_rest_region>,
+ <&wkup_r5fss0_core0_dm_region>;
+ memory-region-names = "dma", "ipc", "lpm-stub",
+ "lpm-metadata", "lpm-context",
+ "dm-firmware";
+};

--
2.53.0