From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philippe Schenker Subject: [PATCH v2 02/20] ARM: dts: imx7-colibri: disable HS400 Date: Wed, 31 Jul 2019 12:38:03 +0000 Message-ID: <20190731123750.25670-3-philippe.schenker@toradex.com> References: <20190731123750.25670-1-philippe.schenker@toradex.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20190731123750.25670-1-philippe.schenker@toradex.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: devicetree@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 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