From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Fri, 14 Mar 2014 14:19:08 +0000 (+0100)
Subject: pwm: atmel: Fix polarity handling
X-Git-Tag: v3.15-rc1~73^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8db9e29fe540c9640ea60f37ecf99d3a73bd12c5;p=pandora-kernel.git

pwm: atmel: Fix polarity handling

When atmel_pwm_config() calculates and then sets the prescaler, it is
overwriting the channel's CMR register so we are losing the CPOL
configuration.

As atmel_pwm_config() is always called before enabling a channel,
inverting the polarity doesn't work.

Fix that by reading CMR first and only overwriting the prescaler bits.

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