linux-kernel - Re: [PATCH] power_supply: add CHARGE_COUNTER property and olpc

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Message-ID: <4829A39F.7050308@laptop.org>
Date:	Tue, 13 May 2008 10:20:15 -0400
From:	"Richard A. Smith" <richard@...top.org>
To:	Andres Salomon <dilinger@...ued.net>
CC:	avorontsov@...mvista.com,
	Andrew Morton <akpm@...ux-foundation.org>, cbou@...l.ru,
	linux-kernel@...r.kernel.org, dwmw2@...radead.org
Subject: Re: [PATCH] power_supply: add CHARGE_COUNTER property and olpc_battery
 support for it

Andres Salomon wrote:

> +		ec_word = be16_to_cpu(ec_word);
> +		val->intval = ec_word * 4167 / 10;

Whats wrong with:

 > +		val->intval = ((int)ec_word) * 6250 / 15;

Which does not have overflow problems and keeps more precision.

-- 
Richard Smith  <richard@...top.org>
One Laptop Per Child
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