git.sur5r.net Git - u-boot/blob - doc/device-tree-bindings/regulator/fixed.txt

   1 Fixed Voltage regulator
   2
   3 Binding:
   4 The binding is done by the property "compatible" - this is different, than for
   5 binding by the node prefix (doc/device-tree-bindings/regulator/regulator.txt).
   6
   7 Required properties:
   8 - compatible: "regulator-fixed"
   9 - regulator-name: this is required by the regulator uclass
  10
  11 Optional properties:
  12 - gpio: GPIO to use for enable control
  13 - startup-delay-us: startup time in microseconds
  14 - regulator constraints (binding info: regulator.txt)
  15 - enable-active-high: Polarity of GPIO is Active high. If this property
  16   is missing, the default assumed is Active low.
  17
  18
  19 Other kernel-style properties, are currently not used.
  20
  21 Note:
  22 For the regulator constraints, driver expects that:
  23 - regulator-min-microvolt is equal to regulator-max-microvolt
  24 - regulator-min-microamp is equal to regulator-max-microamp
  25
  26 Example:
  27 fixed_regulator@0 {
  28         /* Mandatory */
  29         compatible = "regulator-fixed";
  30         regulator-name = "LED_3.3V";
  31
  32         /* Optional: */
  33         gpio = <&gpc1 0 GPIO_ACTIVE_LOW>;
  34
  35         /* Optional for regulator uclass */
  36         regulator-min-microvolt = <3300000>;
  37         regulator-max-microvolt = <3300000>;
  38         regulator-min-microamp = <15000>;
  39         regulator-max-microamp = <15000>;
  40         regulator-always-on;
  41         regulator-boot-on;
  42         enable-active-high;
  43 };