linux-kernel - Re: [PATCH 2/4] ARM: qcom: add description of KPSS WDT for IPQ8064

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Message-ID: <20141001172855.GL10233@codeaurora.org>
Date:	Wed, 1 Oct 2014 10:28:55 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Josh Cartwright <joshc@...eaurora.org>
Cc:	Kumar Gala <galak@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-arm-msm@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] ARM: qcom: add description of KPSS WDT for IPQ8064

On 10/01, Josh Cartwright wrote:
> @@ -96,6 +104,13 @@
>  			cpu-offset = <0x80000>;
>  		};
>  
> +		watchdog@...a038 {
> +			compatible = "qcom,kpss-wdt-ipq8064";
> +			reg = <0x0208a038 0x40>;

Not being aligned to 4k or 1k raises red flags.

The watchdog is part of the timer block (on this chip it's
"qcom,kpss-timer"). We should add qcom,kpss-wdt to the compatible
list in the timer binding and extend that binding to have clocks
and timeout-sec (watchdog-timeout-sec?). This would follow DT
best practices of having one node per device. We could also add
the interrupts too, even if they're not used by the driver right
now.

> +			clocks = <&sleep_clk>;
> +			timeout-sec = <10>;
> +		};
> +

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