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pwm-backlight: Track enable state
authorThierry Reding <treding@nvidia.com>
Wed, 2 Oct 2013 16:01:02 +0000 (18:01 +0200)
committerThierry Reding <thierry.reding@gmail.com>
Wed, 16 Oct 2013 07:05:57 +0000 (09:05 +0200)
Follow up patches will add support for more complex means of powering
the backlight on and off such as using a regulator. To prevent calls to
the regulator API from becoming unbalanced, keep track of the enabled
state internally.

Signed-off-by: Thierry Reding <treding@nvidia.com>

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