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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: kkNY0tknsP29a6mPD23ueNJstUZ0eLSGWP+n+LcZ8EtKYu/T8dBp54T8b3y+OP3qH7lq1tL3ly8nE8OLYQIgQ1BSZeVbW/kRNhIzXFjtdQfZWQMH6vpmfp9fVTcSW7VyeBvmMUJytmxyHPyJIifhsakFxqYjwERpa6kX2gDXK8+Bq4mf0/CXZ3ahYu6mRo62Rw6mt/QJPE22dbfB8bXOEH5yxUNacxzV5JWldqslSJDfAeRsEbMwCfUotaCV7DF1NReBQQikpZ2k+imsBYFhq2SPTuqqs4wdP/ZzX3oLqrHxZzwMc5k6eqmKxzCOmkCytYNQvGaM5lL/CrCJG2nJh7TUPkrPcC+TdVXdKyMB8FsQRhANL7ZO/E2hKB/4BOXU4opiepT1PGSYdZgZJOgO/+iCuCl49o82SqxEeLjhmq5pTUEie/oGjp254QUOCBOk X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 May 2026 14:09:13.3598 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 85a4c4e0-08f3-4ec7-83a2-08deab790d3f 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: BL6PEPF00020E64.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR10MB7116 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260506_070919_741004_61967FB0 X-CRM114-Status: GOOD ( 10.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org According to section "6.5.3 Normative Spread Spectrum Clocking (SSC)" of the USB 3.2 Specification, SSC should be enabled by default. This protects against EMI violations. Hence, enable internal SSC for USB SuperSpeed. Fixes: 39ac6623b1d8 ("arm64: dts: ti: Add Aquila AM69 Support") Cc: Signed-off-by: Siddharth Vadapalli --- v1: https://lore.kernel.org/r/20260505110631.1144200-8-s-vadapalli@ti.com/ Changes since v1: - Reordered properties in serdes_wiz0 node to place status at the end. arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi b/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi index 5119baf62a4c..a5228a7d8339 100644 --- a/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi @@ -1423,6 +1423,7 @@ serdes0_usb0_ss_link: phy@3 { resets = <&serdes_wiz0 4>; cdns,num-lanes = <1>; cdns,phy-type = ; + cdns,ssc-mode = <2>; /* 2 for internal SSC */ }; }; @@ -1501,6 +1502,11 @@ &serdes_ln_ctrl { }; &serdes_wiz0 { + ti,core-clk-sel = <1>; /* Select internal reference clock */ + ti,ssc-enable; /* Enable SSC */ + ti,ssc-type = <1>; /* 1 for Downspread */ + ti,ssc-frequency-hz = <33000>; /* 33 KHz */ + ti,ssc-depth-per-mil = <5>; /* 0.5% depth */ status = "okay"; }; -- 2.51.1