From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Fri, 14 Mar 2014 14:19:09 +0000 (+0100)
Subject: pwm: atmel: correct CDTY calculation
X-Git-Tag: v3.15-rc1~73^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=916030db4399f9237beef480fee6b11dd83cacd5;p=pandora-kernel.git

pwm: atmel: correct CDTY calculation

From the datasheet, the actual duty cycle is:

	(period - (1 / clk) * CDTY) / period

This actually correct the polarity of the PWM and solves the issue that
pwm-leds exhibits: when setting a duty cycle of 0 and then disabling a
channel, the level was wrong (1 when the polarity was normal and 0 when
the polarity was inversed).

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

Reading git-diff-tree failed