From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755592AbeDZKuz (ORCPT ); Thu, 26 Apr 2018 06:50:55 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:51071 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755029AbeDZKux (ORCPT ); Thu, 26 Apr 2018 06:50:53 -0400 X-Google-Smtp-Source: AB8JxZqWFCy51jKRMldi6ynwc0EOCS+vObZnIjQI4ochFxp5Ixylj6fOTPXcfhe3txT4DWPaHr1WwA== From: Jerome Brunet To: Carlo Caione , Kevin Hilman Cc: Jerome Brunet , devicetree@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ARM64: dts: meson: disable sd-uhs modes on the libretech-cc Date: Thu, 26 Apr 2018 12:50:46 +0200 Message-Id: <20180426105046.14817-1-jbrunet@baylibre.com> X-Mailer: git-send-email 2.14.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is a problem with the sd-uhs mode when doing a soft reboot. Switching back from 1.8v to 3.3v messes with the card, which no longer respond (timeout errors). According to the specification, we should perform a card reset (power cycling the card) but this is something we cannot control on this design. Then the only solution to restore the communication with the card is an "unplug-plug" which is not acceptable Until we find a solution, if any, disable the sd-uhs modes on this design. For the people using uhs at the moment, there will a performance drop as a result. Fixes: 3cde63ebc85c ("ARM64: dts: meson-gxl: libretech-cc: enable high speed modes") Signed-off-by: Jerome Brunet --- arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts index 3e3eb31748a3..f63bceb88caa 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts @@ -234,9 +234,6 @@ bus-width = <4>; cap-sd-highspeed; - sd-uhs-sdr12; - sd-uhs-sdr25; - sd-uhs-sdr50; max-frequency = <100000000>; disable-wp; -- 2.14.3