From 2cfd22f4730d5e759a313729b92a72bcc12c41cb Mon Sep 17 00:00:00 2001
From: Alexandre Courbot <acourbot@nvidia.com>
Date: Sat, 26 Jul 2014 18:41:39 +0900
Subject: [PATCH] drm/nouveau/clk: make therm and volt devices optional

Allow the clock subsystem to operate even if voltage and thermal devices
are not set for the device (for people with watercooling! ;))

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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