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Message-Id: <20191003154506.035362103@linuxfoundation.org>
Date: Thu, 3 Oct 2019 17:52:28 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Stefan Agner <stefan.agner@...adex.com>,
Philippe Schenker <philippe.schenker@...adex.com>,
Oleksandr Suvorov <oleksandr.suvorov@...adex.com>,
Shawn Guo <shawnguo@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 082/211] ARM: dts: imx7-colibri: disable HS400
From: Stefan Agner <stefan.agner@...adex.com>
[ Upstream commit a95fbda08ee20cd063ce5826e0df95a2c22ea8c5 ]
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@...adex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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-colibri.dtsi
index 895fbde4d4333..c1ed83131b495 100644
--- a/arch/arm/boot/dts/imx7-colibri.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri.dtsi
@@ -323,6 +323,7 @@
vmmc-supply = <®_module_3v3>;
vqmmc-supply = <®_DCDC3>;
non-removable;
+ sdhci-caps-mask = <0x80000000 0x0>;
};
&iomuxc {
--
2.20.1
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