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Received: from AS4P195MB1456.EURP195.PROD.OUTLOOK.COM (2603:10a6:20b:4b3::21) by PR3P195MB0617.EURP195.PROD.OUTLOOK.COM (2603:10a6:102:31::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9870.19; Thu, 7 May 2026 12:56:35 +0000 Received: from AS4P195MB1456.EURP195.PROD.OUTLOOK.COM ([fe80::295f:9a59:b66a:621a]) by AS4P195MB1456.EURP195.PROD.OUTLOOK.COM ([fe80::295f:9a59:b66a:621a%6]) with mapi id 15.20.9891.016; Thu, 7 May 2026 12:56:35 +0000 Message-ID: <8bff1c7d-e43d-41e6-8b1f-476e8b5caefa@phytec.de> Date: Thu, 7 May 2026 15:56:32 +0300 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 02/13] arm64: dts: ti: k3-am642-phyboard-electra-rdk: fix USB clocking for compliance To: Siddharth Vadapalli , nm@ti.com, vigneshr@ti.com, kristo@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, josua@solid-run.com, matthias.schiffer@ew.tq-group.com, d.haller@phytec.de, francesco.dolcini@toradex.com, joao.goncalves@toradex.com, emanuele.ghidoli@toradex.com, ernest.vanhoecke@toradex.com, rogerq@kernel.org, eballetb@redhat.com, robertcnelson@gmail.com, afd@ti.com, u-kumar1@ti.com Cc: stable@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, luis.parga@ti.com, srk@ti.com References: <20260506141040.1368918-1-s-vadapalli@ti.com> <20260506141040.1368918-3-s-vadapalli@ti.com> Content-Language: en-US From: Wadim Egorov In-Reply-To: <20260506141040.1368918-3-s-vadapalli@ti.com> Content-Type: text/plain; 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This protects > against EMI violations. Hence, enable internal SSC for USB SuperSpeed. > > Fixes: c48ac0efe6d7 ("arm64: dts: ti: Add support for phyBOARD-Electra-AM642") > Cc: > Signed-off-by: Siddharth Vadapalli Acked-by: Wadim Egorov > --- > > v1: > https://lore.kernel.org/r/20260505110631.1144200-3-s-vadapalli@ti.com/ > No changes since v1. > > arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts > index 793538f94942..a85d7d08bd1b 100644 > --- a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts > +++ b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts > @@ -439,12 +439,21 @@ &sdhci1 { > status = "okay"; > }; > > +&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 { > serdes0_pcie_usb_link: phy@0 { > reg = <0>; > cdns,num-lanes = <1>; > #phy-cells = <0>; > cdns,phy-type = ; > + cdns,ssc-mode = <2>; /* 2 for internal SSC */ > resets = <&serdes_wiz0 1>; > }; > };