Messages in this thread | | | Date | Tue, 17 Sep 2013 11:36:22 +0200 | From | Sascha Hauer <> | Subject | Re: [PATCH] pwm-backlight: allow for non-increasing brightness levels |
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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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