linux-kernel - Re: [PATCH 1/3] mfd: tps6586x: add version detection

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Message-ID: <20131127143641.GO3296@lee--X1>
Date:	Wed, 27 Nov 2013 14:36:41 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Stefan Agner <stefan@...er.ch>
Cc:	swarren@...dotorg.org, thierry.reding@...il.com,
	sameo@...ux.intel.com, dev@...xeye.de, mark.rutland@....com,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] mfd: tps6586x: add version detection

Re-adding the list.

Please remember to 'reply to all' when discussing patches.

> > >> Hm, when the device is not answering on that request, the probe method
> > >> should fail I would say. This means that the device is missing most
> > >> likely. However, I should set the device version to TPS6586X_ANY if I
> > >> happen to end up in the default case.
> > > 
> > > I would say that returning an error is the sound thing to do, but I'm
> > > missing the point of TPS6586X_ANY, as it doesn't appear to be used in
> > > this context.
> > > 
> > 
> > Yes, its mainly used in the regulator code later on. I do assign voltage
> > table to TPS6586X_ANY, if its the appropriate table for any version of
> > the device. 
> 
> <snip>
> 
> > Ok, will change this. Setting the version to TPS6586X_ANY in the default
> > case is anyway not a good idea since it would suppress unknown versions.
> 
> Perhaps I should suggest to make TPS6586X_ANY a positive number then,
> as a negative value to me indicates more of an error than a generic
> parameter.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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