From: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
To: Wadim Egorov <w.egorov-guT5V/WYfQezQB+pC5nmwQ@public.gmane.org>
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
naobsd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [PATCH] ARM: dts: rockchip: Bump sd card pin drive strength up on firefly boards
Date: Fri, 22 Jan 2016 14:33:13 +0100 [thread overview]
Message-ID: <1922254.O59ZZAW3Pv@phil> (raw)
In-Reply-To: <1453381033-3479-1-git-send-email-w.egorov-guT5V/WYfQezQB+pC5nmwQ@public.gmane.org>
Am Donnerstag, 21. Januar 2016, 13:57:13 schrieb Wadim Egorov:
> It seems some firefly boards need 12mA drive strength for sdmmc.
> Using 4mA/8mA drive strength will cause the kernel to fail to recognize
> the sd card correctly.
> Increased the sdmmc lines drive strength from 4mA to 12mA.
>
> Signed-off-by: Wadim Egorov <w.egorov-guT5V/WYfQezQB+pC5nmwQ@public.gmane.org>
applied to my dts32 branch for 4.6.
As I said somewhere on IRC before, it might be worthwhile to bump the
default drive-strength at some point, but so far it seems the minimal needed
values seem to diverge (8mA on Veyron, 12ma [4mA on mine] on firefly and
seemingly 4mA working fine on the Rock2). So I guess we'll postpone that a
bit more until we have more datapoints ;-)
Heiko
WARNING: multiple messages have this Message-ID (diff)
From: heiko@sntech.de (Heiko Stuebner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: rockchip: Bump sd card pin drive strength up on firefly boards
Date: Fri, 22 Jan 2016 14:33:13 +0100 [thread overview]
Message-ID: <1922254.O59ZZAW3Pv@phil> (raw)
In-Reply-To: <1453381033-3479-1-git-send-email-w.egorov@phytec.de>
Am Donnerstag, 21. Januar 2016, 13:57:13 schrieb Wadim Egorov:
> It seems some firefly boards need 12mA drive strength for sdmmc.
> Using 4mA/8mA drive strength will cause the kernel to fail to recognize
> the sd card correctly.
> Increased the sdmmc lines drive strength from 4mA to 12mA.
>
> Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
applied to my dts32 branch for 4.6.
As I said somewhere on IRC before, it might be worthwhile to bump the
default drive-strength at some point, but so far it seems the minimal needed
values seem to diverge (8mA on Veyron, 12ma [4mA on mine] on firefly and
seemingly 4mA working fine on the Rock2). So I guess we'll postpone that a
bit more until we have more datapoints ;-)
Heiko
next prev parent reply other threads:[~2016-01-22 13:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-21 12:57 [PATCH] ARM: dts: rockchip: Bump sd card pin drive strength up on firefly boards Wadim Egorov
2016-01-21 12:57 ` Wadim Egorov
[not found] ` <1453381033-3479-1-git-send-email-w.egorov-guT5V/WYfQezQB+pC5nmwQ@public.gmane.org>
2016-01-22 13:33 ` Heiko Stuebner [this message]
2016-01-22 13:33 ` Heiko Stuebner
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=1922254.O59ZZAW3Pv@phil \
--to=heiko-4mtyjxux2i+zqb+pc5nmwq@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=naobsd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=w.egorov-guT5V/WYfQezQB+pC5nmwQ@public.gmane.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.