linux-kernel - Re: [PATCH] regulator: s5m8767: Disable OVCB in probe

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Message-ID: <20131113135021.GN878@sirena.org.uk>
Date:	Wed, 13 Nov 2013 13:50:21 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Sangbeom Kim <sbkim73@...sung.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH] regulator: s5m8767: Disable OVCB in probe

On Tue, Nov 12, 2013 at 02:41:55PM +0100, Krzysztof Kozlowski wrote:
> According to SW Guide the Over-Voltage Clamp may malfunction at VBatt
> 5.25V and 110'C temperature. This may result in overshooting or
> undershooting LDO's voltage outputs.
> Disable the Over-Voltage Clamp in probe by updating proper bit in all
> LDO registers.

Is there no way to detect these conditions at runtime?  The temperature
condition in particular seems very high and hence relatively unlikely to
hold most of the time, disabling the overvoltage protection all the time
seems like an uncertain tradeoff.

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