From: Guenter Roeck <linux@roeck-us.net>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
linux-watchdog@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Subject: Re: [PATCH] watchdog: renesas_wdt: adapt timer setup to recommended procedure
Date: Tue, 27 Feb 2018 09:19:15 -0800 [thread overview]
Message-ID: <20180227171915.GC1212@roeck-us.net> (raw)
In-Reply-To: <20180227162256.fgyd3oikydrq3e7i@katana>
On Tue, Feb 27, 2018 at 05:22:56PM +0100, Wolfram Sang wrote:
>
> > the core gets it wrong. Just add a note to the probe function where cks is
> > initialized that RWTCSRA_TME must not be set, and that RWTCSRA_TME must be
> > cleared before changing the divider.
>
> But we would still need to disable TME sperately if the caclulated cks
> is not the same value as the current register value (be it power-on
> default or something the firmware did set). Because we shall not disable
> TME and modify cks at the same time.
>
AFAICS this only applies if the watchdog is already running at boot,
which is not currently supported to start with.
Guenter
next prev parent reply other threads:[~2018-02-27 17:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-26 21:49 [PATCH] watchdog: renesas_wdt: adapt timer setup to recommended procedure Wolfram Sang
2018-02-26 22:38 ` Guenter Roeck
2018-02-27 13:00 ` Wolfram Sang
2018-02-27 15:03 ` Guenter Roeck
2018-02-27 16:22 ` Wolfram Sang
2018-02-27 17:19 ` Guenter Roeck [this message]
2018-02-27 20:36 ` Wolfram Sang
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