linux-kernel - Re: [PATCH] pwm: lpc32xx

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Message-ID: <20121106181939.61c50233@avionic-0020.adnet.avionic-design.de>
Date:	Tue, 6 Nov 2012 18:19:39 +0100
From:	Alban Bedel <alban.bedel@...onic-design.de>
To:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
Cc:	Roland Stigge <stigge@...com.de>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Alban Bedel <alban.bedel@...onic-design.de>
Subject: Re: [PATCH] pwm: lpc32xx - Fix the PWM polarity

On Tue, 6 Nov 2012 07:47:22 -0200
Alexandre Pereira da Silva <aletes.xgr@...il.com> wrote:

> Can you test the 0 and 255 values on actual hardware and see the effective
> values?

0   ->   0%
1   ->  99%
128 ->  50%
255 ->   1%

So yes 0 mean 256.

> It may be handled as the RELOADV where 0 really means 256. If so, you can
> use the same logic I used originally on the frequency division.

I'll look at this and submit a new patch.

Alban
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