:orphan:

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.. dtcompatible:: dac-leds
.. _dtbinding_dac_leds:

dac-leds
########

Vendor: :ref:`Generic or vendor-independent <dt_no_vendor>`

.. note::

   An implementation of a driver matching this compatible is available in
   :zephyr_file:`drivers/led/led_dac.c`.

Description
***********



.. code-block:: none

   Group of DAC-controlled LEDs.

   Each LED is defined in a child node of the dac-leds node.

   Here is an example which defines an LED in the node /leds:

   / {
           leds {
                   compatible = "dac-leds";
                   led_0 {
                           dac-dev = <&dac1>;
                           channel = <0>;
                           resolution = <12>;
                   };
                   led_1 {
                           dac-dev = <&dac1>;
                           channel = <1>;
                           resolution = <12>;
                           voltage-min-brightness-mv = <1400>;
                           voltage-max-brightness-mv = <2700>;
                           voltage-max-dac-mv = <3300>;
                           output-buffer;
                   };
           };
   };

   Above:

   - led_0 uses dac1 channel 0 with 12 bit resolution.
   - led_1 uses dac1 channel 1 with 12 bit resolution and setup to supply an LED directly.

Properties
**********

Top level properties
====================

No top-level properties.

Child node properties
=====================

.. list-table::
   :widths: 1 1 4
   :header-rows: 1

   * - Name
     - Type
     - Details

   * - ``dac-dev``
     - ``phandle``
     - .. code-block:: none

          Property containing phandle to DAC e.g. &dac.



       This property is **required**.

   * - ``channel``
     - ``int``
     - .. code-block:: none

          The DAC channel.



       This property is **required**.

   * - ``resolution``
     - ``int``
     - .. code-block:: none

          The DAC resolution to use.



       This property is **required**.

   * - ``voltage-min-brightness-mv``
     - ``int``
     - .. code-block:: none

          Voltage at brightness 0%.
          If not specified the minimum DAC output voltage is used.



   * - ``voltage-max-brightness-mv``
     - ``int``
     - .. code-block:: none

          Voltage at brightness 100%.
          If not specified the maximum DAC output voltage is used.



   * - ``voltage-max-dac-mv``
     - ``int``
     - .. code-block:: none

          The DAC maximum output voltage.
          Required if voltage-min-brightness-mv or voltage-max-brightness-mv is set.



   * - ``output-buffer``
     - ``boolean``
     - .. code-block:: none

          Enable the output buffer of the DAC.
          This is required if it is used to drive an LED directly.