linux-kernel - [PATCH v3 0/2] Add TI K3 HSM M4F nodes in device-tree

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Message-ID: <20260114173551.2545088-1-b-padhi@ti.com>
Date: Wed, 14 Jan 2026 23:05:49 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <afd@...com>, <u-kumar1@...com>, <hnagalla@...com>, <b-padhi@...com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v3 0/2] Add TI K3 HSM M4F nodes in device-tree

Some of the TI K3 family of SoCs (like J721S2, J784S4, J722S) have a
HSM (High Security Module) M4F core in the Wakeup Voltage Domain which
could be used to run secure services like Authentication. Add the device
device-tree node definitions for this HSM M4F core. The bindings for
this has already been merged[0].

The HSM M4 core is typically booted early from the bootloader and the
driver for the same is posted in U-Boot mailing list[1].

v3: Changelog:
[Nishanth]:
 1. Use generic node name 'remoteproc'
 2. Use label 'hsm' instead of 'hsm_m4fss'
 3. Add a comment for separate SRAMs
 4. Change firmware-name value to match existing naming convention
 5. Change status to 'reserved' and add a commment
 6. Re-order bootph-pre-ram property before vendor properties
 7. Update commit message to call out rationale for putting firmare-name
    in SoC level dtsi
 8. Dropped [PATCH v2 1/3] in v3 as it is already merged[0].

Link to v2:
https://lore.kernel.org/all/20260106104755.948086-1-b-padhi@ti.com/

v2: Changelog:
[Krzysztof Kozlowski]:
 In [PATCH v2 1/3]
 1. Update commit msg to remove redundant "bindings".
 2. Update filename to match compatible.
 3. Remove "address-cells" & "size-cells" property. These belong to the
    device's parent node.
 4. Drop description from firmware-name property.
 5. Fix indentation for DT example.

Link to v1:
https://lore.kernel.org/all/20251231165102.950644-1-b-padhi@ti.com/

[0]: https://lore.kernel.org/all/aV59SdFU15HpLHeO@p14s/
[1]: https://lore.kernel.org/all/20251231173621.1069988-1-b-padhi@ti.com/

Beleswar Padhi (2):
  arm64: dts: ti: k3-{j784s4-j742s2/j721s2}-mcu-wakeup: Add HSM M4F node
  arm64: dts: ti: k3-am62p-j722s-common-main: Add HSM M4F node

 .../boot/dts/ti/k3-am62p-j722s-common-main.dtsi | 17 +++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am62p.dtsi            |  1 +
 .../arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 17 +++++++++++++++++
 arch/arm64/boot/dts/ti/k3-j722s-main.dtsi       |  5 +++++
 arch/arm64/boot/dts/ti/k3-j722s.dtsi            |  1 +
 .../arm64/boot/dts/ti/k3-j742s2-mcu-wakeup.dtsi |  4 ++++
 .../ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi  | 17 +++++++++++++++++
 7 files changed, 62 insertions(+)

-- 
2.34.1