Re: [PATCH] pwm-backlight: allow for non-increasing brightness levels

[Sascha Hauer]

Hi Mike,

On Thu, Sep 12, 2013 at 11:35:52AM -0700, Mike Dunn wrote:
> Currently the driver assumes that the values specified in the brightness-levels
> device tree property increase as they are parsed from left to right.  But boards
> that invert the signal between the PWM output and the backlight will need to
> specify decreasing brightness-levels.  This patch removes the assumption that
> the last element of the array is the max value, and instead searches the array
> for the max value and uses that as the normalizing value when determining the
> duty cycle.

Note there's also support for inverted PWMs in the PWM framework
provided your hardware supports this.

Sascha

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