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Miller" , Jakub Kicinski , Antoine Tenart , Florian Fainelli , Ioana Ciornei , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Steen Hegelund Subject: Re: [PATCH net v1 1/3] net: phy: mscc: adding LCPLL reset to VSC8514 Thread-Topic: [PATCH net v1 1/3] net: phy: mscc: adding LCPLL reset to VSC8514 Thread-Index: AQHXAUhdAGZIwJCnokGEX7Rqm0aTdqpUtC0A Date: Fri, 12 Feb 2021 16:23:19 +0000 Message-ID: <20210212162318.zx6nx2suzdfocu55@skbuf> References: <20210212140643.23436-1-bjarni.jonasson@microchip.com> In-Reply-To: <20210212140643.23436-1-bjarni.jonasson@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: microchip.com; dkim=none (message not signed) header.d=none;microchip.com; dmarc=none action=none header.from=nxp.com; x-originating-ip: [5.12.227.87] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 0b16bdad-d705-4414-7a84-08d8cf72827a x-ms-traffictypediagnostic: VE1PR04MB7470: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5797; 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charset="us-ascii" Content-ID: <302086AB8D16B041826B95C65D806E39@eurprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5136.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0b16bdad-d705-4414-7a84-08d8cf72827a X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Feb 2021 16:23:19.4501 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: c+fR+8+bQ1HAjSl0Zx1DNHh8YCBEiAkZSlo28pOb3KOHVXID2jygC50jeekK1e5/ESpe4rNTqaX05mXzx/Pxxg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB7470 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Fri, Feb 12, 2021 at 03:06:41PM +0100, Bjarni Jonasson wrote: > At Power-On Reset, transients may cause the LCPLL to lock onto a > clock that is momentarily unstable. This is normally seen in QSGMII > setups where the higher speed 6G SerDes is being used. > This patch adds an initial LCPLL Reset to the PHY (first instance) > to avoid this issue. >=20 > Signed-off-by: Steen Hegelund > Signed-off-by: Bjarni Jonasson > Fixes: e4f9ba642f0b ("net: phy: mscc: add support for VSC8514 PHY.") > --- Tested-by: Vladimir Oltean # for regressions=