From: Sascha Hauer <s.hauer@pengutronix.de>
To: Juergen Beisert <jbe@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: i.MX23/i.MX28, software reset feature
Date: Wed, 20 Jun 2012 09:32:41 +0200 [thread overview]
Message-ID: <20120620073241.GK28394@pengutronix.de> (raw)
In-Reply-To: <201206191229.29035.jbe@pengutronix.de>
On Tue, Jun 19, 2012 at 12:29:28PM +0200, Juergen Beisert wrote:
> Hi list,
>
> currently we use the watchdog to make the "reset" command work on the
> i.XM23/i.MX28 CPUs. This collides if someone wants to use the watchdog in a
> regular manner, as Barebox cannot distinguish if the reset was a result of
> the "reset" command (or "reboot" from Linux) or if something strange happens
> and the watchdog has barked to reboot and try again (maybe in a different
> manner).
>
> The i.XM23/i.MX28 CPUs are coming with a bit in a special register in
> the "clock generation and control" unit to hard reset the whole SoC. This
> could be used instead to make the "reset" command work. But the register
> offsets are different in both SoCs. So:
>
> - using ifdefs to distinguish both SoCs in "arch/arm/mach-mxs/reset-imx.c"
> - or moving the reset_cpu() function into "arch/arm/mach-mxs/speed-imx*.c"
> where all the required symbols and correct offset are already defined on a
> per SoC base?
Or add a imx23.c and imx28.c where we could collect the SoC specific
code.
Sascha
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prev parent reply other threads:[~2012-06-20 7:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-19 10:29 Juergen Beisert
2012-06-20 7:32 ` Sascha Hauer [this message]
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