From: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
To: Christopher Bostic
<cbostic-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
Cc: wim-IQzOog9fTRqzQB+pC5nmwQ@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org,
linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v2 2/2] drivers/watchdog: ASPEED reference dev tree properties for config
Date: Wed, 28 Jun 2017 10:52:16 -0700 [thread overview]
Message-ID: <20170628175216.GA13730@roeck-us.net> (raw)
In-Reply-To: <a3f76a4e-6c44-9844-9840-f6b5b05255ed-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
On Wed, Jun 28, 2017 at 11:09:15AM -0500, Christopher Bostic wrote:
>
> >>
> >>Why would there even be a need configure for no system reset? The external
> >>mode 'wdt ext: External signal enable after timeout' can be sent off chip
> >>even if system reset is disabled. The watchdog is doing something in this
> >>case and would require wdt instantiation.
> >>
> >Wouldn't that be "aspeed,external-signal" ?
> Yes that optional parameter would need to be specified in that situation, as
> well as 'aspeed,no-system-reset'.
>
Ok, makes sense (after looking into the datasheet). The missing detail
is that there is a separate configuration bit for "Reset system after
timeout", which is set in addition to reset_{sys,soc,arm}.
Thanks,
Guenter
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prev parent reply other threads:[~2017-06-28 17:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-27 21:17 [PATCH v2 0/2] Add ASPEED watchdog device tree properties Christopher Bostic
[not found] ` <20170627211734.60477-1-cbostic-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-27 21:17 ` [PATCH v2 1/2] drivers/watchdog: Add optional ASPEED " Christopher Bostic
[not found] ` <20170627211734.60477-2-cbostic-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-27 21:32 ` Guenter Roeck
[not found] ` <20170627213216.GA4132-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-27 21:42 ` Christopher Bostic
[not found] ` <6f2a77e0-e64c-70b7-812a-6a5e8a0b5e6f-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-27 22:07 ` Guenter Roeck
[not found] ` <20170627220740.GA19461-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-28 14:55 ` Christopher Bostic
[not found] ` <ec4a255f-6052-0ad7-32e7-7a86b57e5283-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-28 15:06 ` Guenter Roeck
2017-06-27 21:17 ` [PATCH v2 2/2] drivers/watchdog: ASPEED reference dev tree properties for config Christopher Bostic
[not found] ` <20170627211734.60477-3-cbostic-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-28 11:31 ` Guenter Roeck
[not found] ` <606a2e11-2d43-5204-0bb6-9c4415ee03df-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-28 14:29 ` Christopher Bostic
[not found] ` <de0dc054-0813-fab1-d7ac-2f1d7ba61fd8-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-28 14:54 ` Guenter Roeck
[not found] ` <20170628145452.GA30968-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-28 14:59 ` Christopher Bostic
2017-06-28 15:08 ` Guenter Roeck
[not found] ` <20170628150846.GE30968-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-28 15:55 ` Christopher Bostic
[not found] ` <b6c53add-c165-3678-dfed-cb6f1798accc-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-28 16:06 ` Guenter Roeck
[not found] ` <20170628160649.GB8915-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2017-06-28 16:09 ` Christopher Bostic
[not found] ` <a3f76a4e-6c44-9844-9840-f6b5b05255ed-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-06-28 17:52 ` Guenter Roeck [this message]
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