On Fri, Sep 16, 2016 at 01:34:31PM +0200, Florian Vaussard wrote: > Add device tree binding documentation for On Semiconductor NCP5623 I2C > LED driver. The driver can independently control the PWM of the 3 > channels with 32 levels of intensity. > > The current delivered by the current source can also be controlled. To > do so, the led-max-microamp property is used by each LED sub-node. The > maximum value is then found and used as a limit to compute the final > intensity of the current source. If a LED happens to have a lower limit, > the PWM is then used to limit the current to the requested value. > > In order to control the current source, it is also necessary to know > the current on the Iref pin, hence the onnn,led-iref-microamp property. > It is usually set using an external bias resistor, following > Iref = Vref/Rbias with Vref=0.6V. > > Signed-off-by: Florian Vaussard <[email protected]> > --- > .../devicetree/bindings/leds/leds-ncp5623.txt | 60 > ++++++++++++++++++++++ > 1 file changed, 60 insertions(+) > create mode 100644 Documentation/devicetree/bindings/leds/leds-ncp5623.txt
Acked-by: Rob Herring <[email protected]>
