From e2e08970100db03bb84fd4a72f9c35bfc18d595a Mon Sep 17 00:00:00 2001
From: Nikolaus Voss <n.voss@weinmann-emt.de>
Date: Tue, 23 Sep 2014 15:30:21 +0200
Subject: [PATCH] pwm: atmel: Fix calculation of prescale value

The prescale value used for calculating the period was incremented
afterwards, thus the resulting prescale value is by one too high.
This resulted in a PWM frequency only half as high as requested.

This patch moves the 64 bit division out of the prescale loop to
correct the above issue and make the calculation more efficient.

Signed-off-by: Nikolaus Voss <n.voss@weinmann-emt.de>
Tested-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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