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Thu, 15 Jan 2026 02:26:29 -0600 Received: from [172.24.31.151] (lt5cd2489kgj.dhcp.ti.com [172.24.31.151]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 60F8QO8I1257973; Thu, 15 Jan 2026 02:26:25 -0600 Message-ID: Date: Thu, 15 Jan 2026 13:56:23 +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: "Padhi, Beleswar" , , , , , , CC: , , , , , References: <20260114173551.2545088-1-b-padhi@ti.com> <20260114173551.2545088-3-b-padhi@ti.com> <3a62d6f7-ff88-4f5a-8dfd-ded3e5ff1c86@ti.com> <4eea8956-fcd9-4be4-acc3-b983f1cbe55b@ti.com> Content-Language: en-US From: "Kumar, Udit" In-Reply-To: <4eea8956-fcd9-4be4-acc3-b983f1cbe55b@ti.com> 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: SN1PEPF00036F3C:EE_|MW4PR10MB5749:EE_ X-MS-Office365-Filtering-Correlation-Id: 226612b0-8737-4ef6-d8b7-08de540fc939 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700013|34020700016|376014; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jan 2026 08:26:30.9671 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 226612b0-8737-4ef6-d8b7-08de540fc939 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: SN1PEPF00036F3C.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR10MB5749 On 1/15/2026 11:23 AM, Padhi, Beleswar wrote: > > 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. Ok > >> , 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 > R5 cores are inside cluster , it is be better to handle core and cluster in same way. But this patch is not related to R5. So Reviewed-by: Udit Kumar > > 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 */ >>>>> [..]