* [PATCH 0/2] k3-am62a: Add MCU SRAM node
@ 2026-09-28 3:14 Sai Sree Kartheek Adivi
2026-09-28 3:14 ` [PATCH 1/2] arm64: dts: ti: " Sai Sree Kartheek Adivi
2026-09-28 3:14 ` [PATCH 2/2] arm64: dts: ti: k3-am62a-ti-ipc-firmware: MCU SRAM Sai Sree Kartheek Adivi
0 siblings, 2 replies; 3+ messages in thread
From: Sai Sree Kartheek Adivi @ 2026-09-28 3:14 UTC (permalink / raw)
To: nm, vigneshr, kristo, robh, krzk+dt, conor+dt, linux-arm-kernel,
devicetree, linux-kernel, s-adivi
Cc: hnagalla, jm
The first patch adds MCU SRAM node to the device tree. The second
patch makes the MCU SRAM accessible to R5 remote proc driver for
image loading.
Hari Nagalla (2):
arm64: dts: ti: k3-am62a: Add MCU SRAM node
arm64: dts: ti: k3-am62a-ti-ipc-firmware: MCU SRAM
arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi | 12 ++++++++++++
arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi | 1 +
2 files changed, 13 insertions(+)
--
2.54.0
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 1/2] arm64: dts: ti: k3-am62a: Add MCU SRAM node
2026-09-28 3:14 [PATCH 0/2] k3-am62a: Add MCU SRAM node Sai Sree Kartheek Adivi
@ 2026-09-28 3:14 ` Sai Sree Kartheek Adivi
2026-09-28 3:14 ` [PATCH 2/2] arm64: dts: ti: k3-am62a-ti-ipc-firmware: MCU SRAM Sai Sree Kartheek Adivi
1 sibling, 0 replies; 3+ messages in thread
From: Sai Sree Kartheek Adivi @ 2026-09-28 3:14 UTC (permalink / raw)
To: nm, vigneshr, kristo, robh, krzk+dt, conor+dt, linux-arm-kernel,
devicetree, linux-kernel, s-adivi
Cc: hnagalla, jm
From: Hari Nagalla <hnagalla@ti.com>
AM62A 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@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
index 5b90320778747..23cc9be1dd5cc 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-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>;
+
+ mcu1-sram@0 {
+ reg = <0x0 0x80000>;
+ };
+ };
+
mcu_pmx0: pinctrl@4084000 {
compatible = "pinctrl-single";
reg = <0x00 0x04084000 0x00 0x88>;
--
2.54.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 2/2] arm64: dts: ti: k3-am62a-ti-ipc-firmware: MCU SRAM
2026-09-28 3:14 [PATCH 0/2] k3-am62a: Add MCU SRAM node Sai Sree Kartheek Adivi
2026-09-28 3:14 ` [PATCH 1/2] arm64: dts: ti: " Sai Sree Kartheek Adivi
@ 2026-09-28 3:14 ` Sai Sree Kartheek Adivi
1 sibling, 0 replies; 3+ messages in thread
From: Sai Sree Kartheek Adivi @ 2026-09-28 3:14 UTC (permalink / raw)
To: nm, vigneshr, kristo, robh, krzk+dt, conor+dt, linux-arm-kernel,
devicetree, linux-kernel, s-adivi
Cc: hnagalla, jm
From: Hari Nagalla <hnagalla@ti.com>
TI MCU R5 firmware also uses MCU SRAM, hence make this SRAM
accessible to R5 remote proc for image loading.
Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Judith Mendez <jm@ti.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
arch/arm64/boot/dts/ti/k3-am62a-ti-ipc-firmware.dtsi | 1 +
1 file changed, 1 insertion(+)
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 06d4e815b1670..b33613a21da22 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
@@ -75,6 +75,7 @@ &mcu_r5fss0 {
};
&mcu_r5fss0_core0 {
+ sram = <&mcu_ram>;
mboxes = <&mailbox0_cluster2>, <&mbox_mcu_r5_0>;
memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
<&mcu_r5fss0_core0_memory_region>;
--
2.54.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2026-09-28 3:14 ` [PATCH 2/2] arm64: dts: ti: k3-am62a-ti-ipc-firmware: MCU SRAM Sai Sree Kartheek Adivi
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