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Mon, 12 Aug 2019 14:21:17 +0000 From: Philippe Schenker To: Marcel Ziswiler , Max Krummenacher , "stefan@agner.ch" , "devicetree@vger.kernel.org" , Rob Herring , Shawn Guo , Mark Rutland , =?iso-8859-2?Q?Michal_Vok=E1=E8?= , Fabio Estevam CC: Stefan Agner , Philippe Schenker , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , Pengutronix Kernel Team , NXP Linux Team , Sascha Hauer Subject: [PATCH v4 02/21] ARM: dts: imx7-colibri: disable HS400 Thread-Topic: [PATCH v4 02/21] ARM: dts: imx7-colibri: disable HS400 Thread-Index: AQHVURk0iDp9zOnvgka28q+w6ZrWzw== Date: Mon, 12 Aug 2019 14:21:17 +0000 Message-ID: <20190812142105.1995-3-philippe.schenker@toradex.com> References: <20190812142105.1995-1-philippe.schenker@toradex.com> In-Reply-To: <20190812142105.1995-1-philippe.schenker@toradex.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1P194CA0055.EURP194.PROD.OUTLOOK.COM (2603:10a6:803:3c::44) To VI1PR0502MB3965.eurprd05.prod.outlook.com (2603:10a6:803:23::29) authentication-results: spf=none (sender IP is ) smtp.mailfrom=philippe.schenker@toradex.com; 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received-spf: None (protection.outlook.com: toradex.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: TwiMqcf0xnQoZzQb2j7TIbbQM7d/i+Onz+W4WoYIyZzxA4pXXfO68rK5gzcsBSrFmfg744vQQBNV6zeJyc6qEsPM3JBhpdswVrE62nzwyT+45R6RsAomBoGx7+LBPT80Kbl7zfFR5AChi3jAm4TEiqo8AMq+PX+QoyyX4uFUEEB7og6EYDjg3kd+RWx55h0lHSDVNeYzG7WJv1meBWJD4LMBW/7hqTMWzYv/YRhAHuGHjyNs+3Ew5HROJWy2DBFIKh8xKZ6lzAU2NdkZo/rj4ak2A/blpado3lVWWXl/2vkDgYLlcklJm5PFkzaxIQDp/29Owc25mVSOYUu6AMZ4p4ysK6btmLf4Ceej1SxXMS81z24Q694WW3f9KU33qXEqm3mFC5tVgqrCQM2f6WwMHeyPXqeHGNL4Ts5v4SoDID4= Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: toradex.com X-MS-Exchange-CrossTenant-Network-Message-Id: c23784aa-d077-41f8-5100-08d71f3056c7 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Aug 2019 14:21:17.3537 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d9995866-0d9b-4251-8315-093f062abab4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 6jrWz+4C+v9FlVg/TjQS4Lj0CvyCrzYbf4dAXo8d6p3i2LJ69jM6cDfpKnk27S5XzeTcvBqbbuG6zSgJsCh/0UU3yp5UWLoQSjKtV6q3Zvs= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0502MB2942 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefan Agner Force HS200 by masking bit 63 of the SDHCI capability register. The i.MX ESDHC driver uses SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400. With that the stack checks bit 63 to descide whether HS400 is available. Using sdhci-caps-mask allows to mask bit 63. The stack then selects HS200 as operating mode. This prevents rare communication errors with minimal effect on performance: sdhci-esdhc-imx 30b60000.usdhc: warning! HS400 strobe DLL status REF not lock! Signed-off-by: Stefan Agner Signed-off-by: Philippe Schenker --- Changes in v4: None Changes in v3: None Changes in v2: None arch/arm/boot/dts/imx7-colibri.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-c= olibri.dtsi index f1c1971f2160..f7c9ce5bed47 100644 --- a/arch/arm/boot/dts/imx7-colibri.dtsi +++ b/arch/arm/boot/dts/imx7-colibri.dtsi @@ -325,6 +325,7 @@ vmmc-supply =3D <®_module_3v3>; vqmmc-supply =3D <®_DCDC3>; non-removable; + sdhci-caps-mask =3D <0x80000000 0x0>; }; =20 &iomuxc { --=20 2.22.0