From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35000 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030501AbeGAQba (ORCPT ); Sun, 1 Jul 2018 12:31:30 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jerome Brunet , Kevin Hilman Subject: [PATCH 4.14 053/157] ARM64: dts: meson: disable sd-uhs modes on the libretech-cc Date: Sun, 1 Jul 2018 18:22:05 +0200 Message-Id: <20180701160855.296379694@linuxfoundation.org> In-Reply-To: <20180701160852.287307684@linuxfoundation.org> References: <20180701160852.287307684@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jerome Brunet commit d5b4885b1dff72ac670b518cfeaac719d768bd4d upstream. 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 Cc: stable@vger.kernel.org Signed-off-by: Kevin Hilman Signed-off-by: Greg Kroah-Hartman --- arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts | 3 --- 1 file changed, 3 deletions(-) --- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts @@ -205,9 +205,6 @@ bus-width = <4>; cap-sd-highspeed; - sd-uhs-sdr12; - sd-uhs-sdr25; - sd-uhs-sdr50; max-frequency = <100000000>; disable-wp;