linux-kernel - Re: [PATCH v10 4/5] Watchdog: introduce ARM SBSA watchdog driver

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Date:	Thu, 4 Feb 2016 10:37:38 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Will Deacon <will.deacon@....com>, fu.wei@...aro.org
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org, wim@...ana.be,
	linux@...ck-us.net, corbet@....net, catalin.marinas@....com,
	Suravee.Suthikulpanit@....com, linux-kernel@...r.kernel.org,
	linux-watchdog@...r.kernel.org, linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linaro-acpi@...ts.linaro.org, rruigrok@...eaurora.org,
	harba@...eaurora.org, cov@...eaurora.org, dyoung@...hat.com,
	panand@...hat.com, graeme.gregory@...aro.org, al.stone@...aro.org,
	hanjun.guo@...aro.org, jcm@...hat.com, arnd@...db.de,
	leo.duran@....com, sudeep.holla@....com
Subject: Re: [PATCH v10 4/5] Watchdog: introduce ARM SBSA watchdog driver

Will Deacon 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/

Any reason why we can't just keep it simple and write 0?