linux-kernel - Re: [PATCH v2 09/10] lis3: Scale output values to mg

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Message-ID: <20091115180456.GA21469@atrey.karlin.mff.cuni.cz>
Date:	Sun, 15 Nov 2009 19:04:56 +0100
From:	Pavel Machek <pavel@....cz>
To:	Éric Piel <eric.piel@...mplin-utc.net>
Cc:	Samu Onkalo <samu.p.onkalo@...ia.com>, daniel@...aq.de,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [PATCH v2 09/10] lis3: Scale output values to mg

> Op 10-11-09 13:41, Samu Onkalo schreef:
> > Report output values as 1/1000 of earth gravity.
> After the discussion started by Daniel, I'm willing to accept this patch
> "as is", just with a better log explaining why it's ok to break
> userspace ABI:
>  * the sysfs "position" attribute was never safe to be read as it could
> have different scales depending on the underlying hardware. It's now
> featuring a consistent scale, which is more or less identical to the one
> used by the 12-bits sensors
>  * the joystick interface reports the same values as before, excepted of
> course if "raw" values are requested, in which case the same remark as
> for "position" applies.

agreed.

-- 
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