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

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Date:	Wed, 27 Nov 2013 15:30:19 +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

On Wed, 27 Nov 2013, Stefan Agner wrote:

> Am 2013-11-27 15:36, schrieb Lee Jones:
> <snip>
> >> 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.
> I see, its especially confusing since the version is filled using the
> i2c_smbus_read_byte_data functions return value. The version field is a
> 8-Bit value according to the data sheet, I could use 0x100 as
> TPS6586X_ANY identifier.

How far are we away from using 0xFF?

I'd be happy to use that and change it _if_ we ever get close.

If it's likely that it'll be used, then sure 0x100 sounds okay too.

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