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Wed, 6 May 2026 09:08:59 -0500 From: Siddharth Vadapalli To: , , , , , , , , , , , , , , , , , , CC: , , , , , , Subject: [PATCH v2 06/13] arm64: dts: ti: k3-am68-sk-baseboard: fix USB clocking for compliance Date: Wed, 6 May 2026 19:39:38 +0530 Message-ID: <20260506141040.1368918-7-s-vadapalli@ti.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260506141040.1368918-1-s-vadapalli@ti.com> References: <20260506141040.1368918-1-s-vadapalli@ti.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00003AE7:EE_|LV8PR10MB7966:EE_ X-MS-Office365-Filtering-Correlation-Id: 6ce9aaac-dfbe-4382-59fd-08deab790ae1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|376014|1800799024|7416014|82310400026|921020|18002099003|22082099003|56012099003; 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This protects against EMI violations. Hence, enable internal SSC for USB SuperSpeed. Fixes: 067878e6cd25 ("arm64: dts: ti: k3-am68-sk: Add DT node for USB") Cc: Signed-off-by: Siddharth Vadapalli --- v1: https://lore.kernel.org/r/20260505110631.1144200-7-s-vadapalli@ti.com/ No changes since v1. arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts index 8178333fb2b4..d44c3685503c 100644 --- a/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts +++ b/arch/arm64/boot/dts/ti/k3-am68-sk-base-board.dts @@ -793,6 +793,14 @@ &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"; @@ -810,6 +818,7 @@ serdes0_usb_link: phy@2 { cdns,num-lanes = <1>; #phy-cells = <0>; cdns,phy-type = ; + cdns,ssc-mode = <2>; /* 2 for internal SSC */ resets = <&serdes_wiz0 3>; }; }; -- 2.51.1