linux-kernel - Re: [PATCH v2 1/4] watchdog: aspeed: Retain watchdog enabled state

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Message-ID: <CACPK8XfK8voWhPoYg0kG-OhQoTH_B+=ES8BqbT26bdPYf39d1A@mail.gmail.com>
Date:   Wed, 20 Sep 2017 15:37:13 +0930
From:   Joel Stanley <joel@....id.au>
To:     Andrew Jeffery <andrew@...id.au>
Cc:     linux-watchdog@...r.kernel.org, Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        linux-aspeed@...ts.ozlabs.org, Ryan Chen <ryan_chen@...eedtech.com>
Subject: Re: [PATCH v2 1/4] watchdog: aspeed: Retain watchdog enabled state

On Wed, Sep 20, 2017 at 3:00 PM, Andrew Jeffery <andrew@...id.au> wrote:
> An unintended post-condition of probe() is that the watchdog is
> disabled. This behaviour was introduced by an unnecessary write to the
> control register to configure the hardware based on the devicetree. The
> write is unnecessary because the cached control value that is
> manipulated by the code parsing the devicetree is eventually written by
> aspeed_wdt_enable(), which is when we care how the control register
> should be configured.
>
> Remove the write to restore expected behaviour.
>
> Fixes: b7f0b8ad25f3 ("drivers/watchdog: ASPEED reference dev tree properties for config")
> Signed-off-by: Andrew Jeffery <andrew@...id.au>

Reviewed-by: Joel Stanley <joel@....id.au>

Thanks,

Joel