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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: lyENaAjX+XT3lVJysnig4WFCDfZYJlt59w5YhYh7jHwRNYVIwphHqBVt32f7uIpVJjKIyKqK/JziE2G+7QtHc+f32oEJmC3eQhq9k2PQ7GzMB1kgHII2NFasURqkj8jDnaV4fPeuFNPKdWTxcM+r4hVW/CsQCh85PKHsA2VVWNQA0fSzfSNHEgW136Uh6FAbv/ZVBHyh6vJhgwpkp6oIM33ietzRP+Q0DBcSSH48kHNBdD2fw/dkRnHBsXMbmSicBEMMgi3+tGlHTZet3hOFnDFJ11TIfZu75F41n5Q/JKIjffcTo1yDsl/KthHXwjrY6EQcr8CESSumQ/mtnXP4MIie1rZPh2nbPdqkemcO5xNn0hWHOhpbGR4YDzR1QbvzJnb7tIyRwNxX2B6mYhKc+QVosZumsXpsCxto+HozNuWnk7ZBG0woWYJTstQ8jcOe X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 May 2026 11:04:51.3333 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: aaaf4462-cc93-41ab-f9c5-08deaa96215b X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.194];Helo=[lewvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E63.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB4551 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260505_040459_536238_033C3ACC X-CRM114-Status: GOOD ( 10.36 ) 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: 8bc3b1c86452 ("arm64: dts: ti: Add basic support for phyBOARD-Izar-AM68x") Signed-off-by: Siddharth Vadapalli --- arch/arm64/boot/dts/ti/k3-am68-phyboard-izar.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am68-phyboard-izar.dts b/arch/arm64/boot/dts/ti/k3-am68-phyboard-izar.dts index 225fe7a7803b..d9b61e426ff8 100644 --- a/arch/arm64/boot/dts/ti/k3-am68-phyboard-izar.dts +++ b/arch/arm64/boot/dts/ti/k3-am68-phyboard-izar.dts @@ -505,6 +505,14 @@ &serdes_refclk { clock-frequency = <100000000>; }; +&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 */ +}; + &serdes0 { status = "okay"; @@ -522,6 +530,7 @@ serdes0_usb_link: phy@1 { #phy-cells = <0>; resets = <&serdes_wiz0 2>; cdns,phy-type = ; + cdns,ssc-mode = <2>; /* 2 for internal SSC */ }; }; -- 2.51.1