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Mon, 12 Jan 2026 23:39:12 -0600 Received: from localhost (ada0543016.dhcp.ti.com [172.24.233.9]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 60D5dBTZ1738948; Mon, 12 Jan 2026 23:39:11 -0600 From: Anshul Dalal Date: Tue, 13 Jan 2026 11:08:56 +0530 Subject: [PATCH v8] dt-bindings: arm: keystone: add boot_* mboxes to ti,sci Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260113-k3_syscon_add_boot_mailboxes-v8-1-d43954527b5d@ti.com> X-B4-Tracking: v=1; b=H4sIAG/aZWkC/5XRyU7DMBAG4FepfMYoM9574j0QiuzYphY0RnEUt ary7jgVS3Ih4vjP4ZvtRkoYUijkeLiRIUyppNzXoB8OpDvZ/jXQ5Gsm2KAAaAR9Y225li73rfW +dTmP7dmmd5cvoVDNBTrvjTYSSSU+hhDT5c4/v9R8SmXMw/XebYKl+gUD/A1PQIEKNBZVRGiUf BrTY5fPZFEnXEu4IyFtqA2ug8CVYwY2EvuPxOpMUoIQliOTvttI/FfCvbNNvEo6IMjotDZ8O5N YSbAnieVOVscgpIqebSW5knBvO1klZ5j11kTwXG0k9S3Jpn5jR1JV8kZZw1lsrMAfaZ7nT12ev rWBAgAA X-Change-ID: 20251105-k3_syscon_add_boot_mailboxes-8452bdd98962 To: Nishanth Menon , Tero Kristo , "Santosh Shilimkar" , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Andrew Davis" CC: , , , Vignesh Raghavendra , "Anshul Dalal" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2026 05:39:21.3825 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: eb1fa524-23c1-47f9-73b7-08de52661a50 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000A34A.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR10MB7179 The bootloader on K3 devices makes use of mailboxes as per the ROM spec which might be different than one's available to the kernel (firmware spec). Therefore, this patch adds the missing mailbox entries to the DT binding if the matching compatible is ti,am654-sci to represent the mailboxes exposed by the hardware during boot for the purpose of loading the firmware. The newly added mboxes are made optional by keeping minItems as 2 to remain compliant with existing device-trees. The new 'notify' channel is not supported on all SoCs and is therefore kept at last in the list. Signed-off-by: Anshul Dalal Reviewed-by: Rob Herring (Arm) --- Changes in v8: - Refactored the patch to a simplified diff - Link to v7: https://lore.kernel.org/r/20260107-k3_syscon_add_boot_mailbox= es-v7-1-d97a943f0a52@ti.com Changes in v7: - Removed ti,am642-sci compatible - Keep examples unchanged - Modify ti,am654-sci ordering to ensure compliance with SoCs without a not= ify channel - Link to v6: https://lore.kernel.org/r/20251222-k3_syscon_add_boot_mailbox= es-v6-1-b93ada9f1d47@ti.com Changes in v6: - Added ti,am642-sci compatible to represent SoCs without a "notify" channel - Added new examples instead of editing existing ones - Link to v5: https://lore.kernel.org/r/20251215-k3_syscon_add_boot_mailbox= es-v5-1-5a8fe567fd31@ti.com Changes in v5: - Added commit description for the optional mailboxes - Link to v4: https://lore.kernel.org/r/20251205-k3_syscon_add_boot_mailbox= es-v4-1-8e216fb88941@ti.com Changes in v4: - Make new boot_* mboxes conditional on ti,am654-sci compatible - Link to v3: https://lore.kernel.org/r/20251112-k3_syscon_add_boot_mailbox= es-v3-1-66155a4236dc@ti.com Changes in v3: - Drop [1/2] of the last patch series - Update existing example with boot_* mailboxes instead of adding a new one - Link to v2: https://lore.kernel.org/r/20251112-k3_syscon_add_boot_mailbox= es-v2-0-aebc1e47b391@ti.com Changes in v2: - Remove maxItems entry - Remove RFC tag from patch (added by mistake in v1) - Document the new mailboxes in mboxes instead of mbox-names - Provide example with all the mailboxes set - Update commit title to have "ti,sci" - Split into two patches - Link to v1: https://lore.kernel.org/r/20251111-k3_syscon_add_boot_mailbox= es-v1-1-529a27f21076@ti.com --- .../devicetree/bindings/arm/keystone/ti,sci.yaml | 24 ++++++++++++++++++= ++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml b/D= ocumentation/devicetree/bindings/arm/keystone/ti,sci.yaml index 25a2b42105e5..0e505b96e499 100644 --- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml +++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml @@ -51,15 +51,27 @@ properties: minItems: 1 =20 mbox-names: + minItems: 2 description: | Specifies the mailboxes used to communicate with TI-SCI Controller made available from TI-SCI controller. items: - const: rx - const: tx + - const: boot_rx + - const: boot_tx + - const: boot_notify + - const: notify =20 mboxes: minItems: 2 + items: + - description: RX thread + - description: TX thread + - description: boot stage RX thread + - description: boot stage TX thread + - description: boot stage Notify thread + - description: Notify thread =20 ti,host-id: $ref: /schemas/types.yaml#/definitions/uint32 @@ -79,6 +91,18 @@ properties: type: object $ref: /schemas/reset/ti,sci-reset.yaml# =20 +if: + properties: + compatible: + contains: + const: ti,k2g-sci +then: + properties: + mbox-names: + maxItems: 2 + mboxes: + maxItems: 2 + required: - compatible - mbox-names --- base-commit: f417b7ffcbef7d76b0d8860518f50dae0e7e5eda change-id: 20251105-k3_syscon_add_boot_mailboxes-8452bdd98962 Best regards, --=20 Anshul Dalal