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Wed, 14 Jan 2026 23:53:33 -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 60F5rSU2908196; Wed, 14 Jan 2026 23:53:29 -0600 Message-ID: <4eea8956-fcd9-4be4-acc3-b983f1cbe55b@ti.com> Date: Thu, 15 Jan 2026 11:23:27 +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> <3a62d6f7-ff88-4f5a-8dfd-ded3e5ff1c86@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: CO1PEPF000066E8:EE_|PH0PR10MB7100:EE_ X-MS-Office365-Filtering-Correlation-Id: 79828c3b-591f-486f-16b8-08de53fa74aa X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|34020700016|36860700013|1800799024|376014; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jan 2026 05:53:49.6113 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 79828c3b-591f-486f-16b8-08de53fa74aa X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000066E8.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB7100 On 1/15/2026 11:16 AM, Kumar, Udit wrote: > > On 1/15/2026 11:11 AM, Padhi, Beleswar wrote: >> 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 >> > > > Is this specific handling for m4 core ? For all single cores like M4, DSP, R5F0_0/R5F0_1 etc. > , I see other rproc got power at cluster level We don't make any ti-sci calls for the cluster level, which is why we need that info here in DT. Otherwise, ti-sci calls take care of the individual cores for us. That's why R5F child cores don't have power domain info in the DT: https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi#L1521-L1535 Thanks, Beleswar > > https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi#L1518 > > > >> >> 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 */ >>>> [..]