Re: [PATCH v5 15/16] pwm-backlight: Add rudimentary device tree support

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* Stephen Warren wrote:
> On 03/28/2012 08:33 AM, Thierry Reding wrote:
> > This commit adds very basic support for device tree probing. Currently,
> > only a PWM and a list of distinct brightness levels can be specified.
> > Enabling or disabling backlight power via GPIOs is not yet supported.
> > 
> > Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx>
> > diff --git a/Documentation/devicetree/bindings/video/backlight/pwm-backlight b/Documentation/devicetree/bindings/video/backlight/pwm-backlight
> > +Required properties:
> > +  - compatible: "pwm-backlight"
> > +  - pwms: OF device-tree PWM specification (see PWM binding[0])
> > +  - num-brightness-levels: number of distinct brightness levels
> Do we need the "num-brightness-levels" property at all; it's just the
> length of the brightness-levels property.

No, we don't really need it. As you say, it can be derived from the property


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