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Wed, 14 Jan 2026 23:41:31 -0600 Received: from [10.249.130.12] ([10.249.130.12]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 60F5fQqW894764; Wed, 14 Jan 2026 23:41:27 -0600 Message-ID: <3a62d6f7-ff88-4f5a-8dfd-ded3e5ff1c86@ti.com> Date: Thu, 15 Jan 2026 11:11:25 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/2] arm64: dts: ti: k3-am62p-j722s-common-main: Add HSM M4F node To: "Kumar, Udit" , , , , , , CC: , , , , References: <20260114173551.2545088-1-b-padhi@ti.com> <20260114173551.2545088-3-b-padhi@ti.com> Content-Language: en-US From: "Padhi, Beleswar" In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000055DB:EE_|CO1PR10MB4497:EE_ X-MS-Office365-Filtering-Correlation-Id: 2cfe81ca-3087-4a04-9964-08de53f8bd72 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|34020700016|36860700013|1800799024; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jan 2026 05:41:32.7434 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2cfe81ca-3087-4a04-9964-08de53f8bd72 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.195];Helo=[lewvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000055DB.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR10MB4497 Hi Udit, On 1/15/2026 10:06 AM, Kumar, Udit wrote: > Hi Beleswar, > > On 1/14/2026 11:05 PM, Beleswar Padhi wrote: >> The TI K3 AM62P and J722S SoCs have a HSM (High Security Module) M4F >> core in the MAIN Voltage Domain which could be used to run secure >> services like Authentication. Add Device Tree Node definitions for the >> HSM core in the respective SoC common main dtsi file. >> >> The HSM node is reserved to be loaded and booted by the early-stage >> bootloader. The firmware-name property is defined at the SoC level >> since the HSM is not a general-purpose remote core and boards are >> unlikely to use separate firmware. If needed in exceptional cases, >> board-specific device trees can override this property. >> >> The corresponding reg ranges of HSM node has also been added to its >> parent node's (cbass_main bus) ranges property. >> >> Signed-off-by: Beleswar Padhi >> --- >> 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. Update firmware-name property to match existing naming conventions >>   5. Change status to 'reserved' and add a commment >>   6. Re-order bootph-pre-ram property before vendor properties >>   7. Update commit msg adding rationale for firmware-name in SoC.dtsi >> >> Link to v2: >> https://lore.kernel.org/all/20260106104755.948086-4-b-padhi@ti.com/ >> >> v2: Changelog: >> 1. None >> >> Link to v1: >> https://lore.kernel.org/all/20251231165102.950644-4-b-padhi@ti.com/ >> >>   .../boot/dts/ti/k3-am62p-j722s-common-main.dtsi | 17 +++++++++++++++++ >>   arch/arm64/boot/dts/ti/k3-am62p.dtsi            |  1 + >>   arch/arm64/boot/dts/ti/k3-j722s-main.dtsi       |  5 +++++ >>   arch/arm64/boot/dts/ti/k3-j722s.dtsi            |  1 + >>   4 files changed, 24 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-main.dtsi >> b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-main.dtsi >> index 3cf7c2b3ce2dd..0e1af2a69ca2e 100644 >> --- a/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-main.dtsi >> +++ b/arch/arm64/boot/dts/ti/k3-am62p-j722s-common-main.dtsi >> @@ -1117,4 +1117,21 @@ vpu: video-codec@30210000 { >>           clocks = <&k3_clks 204 2>; >>           power-domains = <&k3_pds 204 TI_SCI_PD_EXCLUSIVE>; >>       }; >> + >> +    hsm: remoteproc@43c00000 { >> +        compatible = "ti,hsm-m4fss"; >> +        /* contiguous regions but instantiated separately in HW */ >> +        reg = <0x00 0x43c00000 0x00 0x20000>, >> +              <0x00 0x43c20000 0x00 0x10000>, >> +              <0x00 0x43c30000 0x00 0x10000>; >> +        reg-names = "sram0_0", "sram0_1", "sram1"; >> +        resets = <&k3_reset 225 1>; >> +        firmware-name = "am62p-hsm-m4f-fw"; > > you don't need clock and power-domain for this ? That info is abstracted out via ti-sci calls. ti_sci_cmd_get_device() takes care of setting clocks and power domains for us. Same for other rprocs: https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi#L178 Thanks, Beleswar > > >> +        bootph-pre-ram; >> +        ti,sci = <&dmsc>; >> +        ti,sci-dev-id = <225>; >> +        ti,sci-proc-ids = <0x80 0xff>; >> +        /* reserved for early-stage bootloader */ >> +        status = "reserved"; >> +    }; >>   }; >> diff --git a/arch/arm64/boot/dts/ti/k3-am62p.dtsi >> b/arch/arm64/boot/dts/ti/k3-am62p.dtsi >> index e2c01328eb298..9d6266d6ddb82 100644 >> --- a/arch/arm64/boot/dts/ti/k3-am62p.dtsi >> +++ b/arch/arm64/boot/dts/ti/k3-am62p.dtsi >> @@ -96,6 +96,7 @@ cbass_main: bus@f0000 { >>                <0x00 0x31100000 0x00 0x31100000 0x00 0x00050000>, /* >> USB1 DWC3 Core window */ >>                <0x00 0x40900000 0x00 0x40900000 0x00 0x00030000>, /* >> SA3UL */ >> [..]