From: Jerome Brunet <jbrunet@baylibre.com>
To: Carlo Caione <carlo@caione.org>, Kevin Hilman <khilman@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>,
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 [thread overview]
Message-ID: <20180426105046.14817-1-jbrunet@baylibre.com> (raw)
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 <jbrunet@baylibre.com>
---
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
WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH] ARM64: dts: meson: disable sd-uhs modes on the libretech-cc
Date: Thu, 26 Apr 2018 12:50:46 +0200 [thread overview]
Message-ID: <20180426105046.14817-1-jbrunet@baylibre.com> (raw)
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 <jbrunet@baylibre.com>
---
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
next reply other threads:[~2018-04-26 10:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-26 10:50 Jerome Brunet [this message]
2018-04-26 10:50 ` [PATCH] ARM64: dts: meson: disable sd-uhs modes on the libretech-cc Jerome Brunet
2018-04-27 19:15 ` Kevin Hilman
2018-04-27 19:15 ` Kevin Hilman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180426105046.14817-1-jbrunet@baylibre.com \
--to=jbrunet@baylibre.com \
--cc=carlo@caione.org \
--cc=devicetree@vger.kernel.org \
--cc=khilman@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.