From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: Xavier Ruppen <xruppen@gmail.com>
Cc: khilman@baylibre.com, Neil Armstrong <narmstrong@baylibre.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org
Subject: Re: [PATCH] arm64: dts: meson: odroid-n2: keep SD card regulator always on
Date: Tue, 23 Jul 2019 21:48:33 +0200 [thread overview]
Message-ID: <CAFBinCDRHbsDPe58qCfOzM_mZ+tmZpg2=dbfWcHntCn4xajOdw@mail.gmail.com> (raw)
In-Reply-To: <20190719192954.26481-1-xruppen@gmail.com>
On Fri, Jul 19, 2019 at 9:29 PM Xavier Ruppen <xruppen@gmail.com> wrote:
>
> When powering off the Odroid N2, the tflash_vdd regulator is
> automatically turned off by the kernel. This is a problem
> when issuing the "reboot" command while using an SD card.
> The boot ROM does not power this regulator back on, blocking
> the reboot process at the boot ROM stage, preventing the
> SD card from being detected.
>
> Adding the "regulator-always-on" property fixes the problem.
>
> Signed-off-by: Xavier Ruppen <xruppen@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
>
> Here is what the boot ROM output looks like without this patch:
>
> [root@alarm ~]# reboot
> [...]
> [ 24.275860] shutdown[1]: All loop devices detached.
> [ 24.278864] shutdown[1]: Detaching DM devices.
> [ 24.287105] kvm: exiting hardware virtualization
> [ 24.318776] reboot: Restarting system
> bl31 reboot reason: 0xd
> bl31 reboot reason: 0x0
> system cmd 1.
> G12B:BL:6e7c85:7898ac;FEAT:E0F83180:2000;POC:F;RCY:0;
> EMMC:800;NAND:81;SD?:0;SD:400;USB:8;LOOP:1;EMMC:800;
> NAND:81;SD?:0;SD:400;USB:8;LOOP:2;EMMC:800;NAND:81;
> SD?:0;SD:400;USB:8;LOOP:3; [...]
>
> Other people can be seen having this problem on the odroid
> forum [1].
thank you for submitting this patch (and not keeping it to yourself)!
> The cause of the problem was found by Martin Blumenstingl
> on #linux-amlogic. We may want to add his Suggested-by tag
> if he agrees.
yes, if you re-send this patch to address Neil's comment then feel
free to add my Reviewed-by as well as a Suggested-by
Martin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-23 19:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 19:29 [PATCH] arm64: dts: meson: odroid-n2: keep SD card regulator always on Xavier Ruppen
2019-07-22 7:21 ` Neil Armstrong
2019-07-24 5:30 ` Anand Moon
2019-07-24 6:49 ` Neil Armstrong
2019-07-24 9:00 ` Anand Moon
2019-07-23 19:48 ` Martin Blumenstingl [this message]
2019-07-25 23:41 ` 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='CAFBinCDRHbsDPe58qCfOzM_mZ+tmZpg2=dbfWcHntCn4xajOdw@mail.gmail.com' \
--to=martin.blumenstingl@googlemail.com \
--cc=khilman@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=narmstrong@baylibre.com \
--cc=xruppen@gmail.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).