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From:   Philippe Schenker <philippe.schenker@toradex.com>
To:     Marcel Ziswiler <marcel.ziswiler@toradex.com>,
        Max Krummenacher <max.krummenacher@toradex.com>,
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CC:     Stefan Agner <stefan.agner@toradex.com>,
        Philippe Schenker <philippe.schenker@toradex.com>,
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        <linux-arm-kernel@lists.infradead.org>,
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        Sascha Hauer <s.hauer@pengutronix.de>
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>
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From: Stefan Agner <stefan.agner@toradex.com>

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 <stefan.agner@toradex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
---

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 <&reg_module_3v3>;
 	vqmmc-supply =3D <&reg_DCDC3>;
 	non-removable;
+	sdhci-caps-mask =3D <0x80000000 0x0>;
 };
=20
 &iomuxc {
--=20
2.22.0