From mboxrd@z Thu Jan  1 00:00:00 1970
From: will.deacon@arm.com (Will Deacon)
Date: Thu, 4 Feb 2016 16:31:02 +0000
Subject: [PATCH v10 4/5] Watchdog: introduce ARM SBSA watchdog driver
In-Reply-To: <1454519923-25230-5-git-send-email-fu.wei@linaro.org>
References: <1454519923-25230-1-git-send-email-fu.wei@linaro.org>
 <1454519923-25230-5-git-send-email-fu.wei@linaro.org>
Message-ID: <20160204163101.GH17257@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Thu, Feb 04, 2016 at 01:18:42AM +0800, fu.wei at linaro.org wrote:
> +static int sbsa_gwdt_keepalive(struct watchdog_device *wdd)
> +{
> +	struct sbsa_gwdt *gwdt = to_sbsa_gwdt(wdd);
> +
> +	/*
> +	* Writing WRR for an explicit watchdog refresh.
> +	* You can write anyting(like 0xc0ffee).
> +	*/
> +	writel(0xc0ffee, gwdt->refresh_base + SBSA_GWDT_WRR);
> +
> +	return 0;
> +}

You might get in trouble for that. 0xd09f00d is probably less poisonous.

http://www.petpoisonhelpline.com/poison/caffeine/

Will