From: Florian Fainelli <f.fainelli@gmail.com>
To: hs@denx.de, linux-embedded@vger.kernel.org
Cc: Wolfgang Denk <wd@denx.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: GPIO triggers kernel reboot
Date: Sat, 25 Jan 2014 18:54:40 -0800 [thread overview]
Message-ID: <52E478F0.60903@gmail.com> (raw)
In-Reply-To: <52E3E031.6040709@denx.de>
Le 25/01/2014 08:02, Heiko Schocher a écrit :
> Hello all,
>
> is it possible to reboot current mainline kernel triggered from a
> GPIO in kernel space?
>
> If not, how can be done this, so that it has a chance to go into
> mainline?
Your GPIO could (should) be bound to a gpio-keys driver which will
deliver key presses event; which you can ultimately bind to the action
of triggering a system reboot.
Granted, this makes you cross a lot of layers, and requires user-space
to implemnt the reboot policy, but what you are asking for is both a
mechanism and policy mix, which is usually not accepted.
You are probably working with HW which won't change, but wiring a reset
button to a system reset output is usually much simpler ;)
>
> Thanks for any suggestions
>
> bye,
> Heiko
WARNING: multiple messages have this Message-ID (diff)
From: f.fainelli@gmail.com (Florian Fainelli)
To: linux-arm-kernel@lists.infradead.org
Subject: GPIO triggers kernel reboot
Date: Sat, 25 Jan 2014 18:54:40 -0800 [thread overview]
Message-ID: <52E478F0.60903@gmail.com> (raw)
In-Reply-To: <52E3E031.6040709@denx.de>
Le 25/01/2014 08:02, Heiko Schocher a ?crit :
> Hello all,
>
> is it possible to reboot current mainline kernel triggered from a
> GPIO in kernel space?
>
> If not, how can be done this, so that it has a chance to go into
> mainline?
Your GPIO could (should) be bound to a gpio-keys driver which will
deliver key presses event; which you can ultimately bind to the action
of triggering a system reboot.
Granted, this makes you cross a lot of layers, and requires user-space
to implemnt the reboot policy, but what you are asking for is both a
mechanism and policy mix, which is usually not accepted.
You are probably working with HW which won't change, but wiring a reset
button to a system reset output is usually much simpler ;)
>
> Thanks for any suggestions
>
> bye,
> Heiko
next prev parent reply other threads:[~2014-01-26 2:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-25 16:02 GPIO triggers kernel reboot Heiko Schocher
2014-01-25 16:02 ` Heiko Schocher
2014-01-25 19:11 ` Mehaffey, John
2014-01-25 19:11 ` Mehaffey, John
2014-01-25 20:24 ` Mehaffey, John
2014-01-25 20:24 ` Mehaffey, John
2014-01-27 6:17 ` Heiko Schocher
2014-01-27 6:17 ` Heiko Schocher
2014-01-26 2:54 ` Florian Fainelli [this message]
2014-01-26 2:54 ` Florian Fainelli
[not found] ` <CALLGbRKK_ZcOB6nAiV67njrphXMQXN7Y2s81n5k3PWoSVrsrUw@mail.gmail.com>
2014-01-27 6:22 ` Heiko Schocher
2014-01-27 6:22 ` Heiko Schocher
2014-01-27 8:08 ` Arnaud Patard
2014-01-27 8:08 ` Arnaud Patard (Rtp)
2014-01-27 8:25 ` Geert Uytterhoeven
2014-01-27 8:25 ` Geert Uytterhoeven
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