Documentation/devicetree/bindings/counter/stm32-lptimer-cnt.txt

   1 STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter
   2
   3 STM32 Low-Power Timer provides several counter modes. It can be used as:
   4 - quadrature encoder to detect angular position and direction of rotary
   5   elements, from IN1 and IN2 input signals.
   6 - simple counter from IN1 input signal.
   7
   8 Must be a sub-node of an STM32 Low-Power Timer device tree node.
   9 See ../mfd/stm32-lptimer.txt for details about the parent node.
  10
  11 Required properties:
  12 - compatible:           Must be "st,stm32-lptimer-counter".
  13 - pinctrl-names:        Set to "default". An additional "sleep" state can be
  14                         defined to set pins in sleep state.
  15 - pinctrl-n:            List of phandles pointing to pin configuration nodes,
  16                         to set IN1/IN2 pins in mode of operation for Low-Power
  17                         Timer input on external pin.
  18
  19 Example:
  20         timer@40002400 {
  21                 compatible = "st,stm32-lptimer";
  22                 ...
  23                 counter {
  24                         compatible = "st,stm32-lptimer-counter";
  25                         pinctrl-names = "default", "sleep";
  26                         pinctrl-0 = <&lptim1_in_pins>;
  27                         pinctrl-1 = <&lptim1_sleep_in_pins>;
  28                 };
  29         };