1STMicroelectronics STM32 Low-Power Timer quadrature encoder and counter 2 3STM32 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 8Must be a sub-node of an STM32 Low-Power Timer device tree node. 9See ../mfd/stm32-lptimer.txt for details about the parent node. 10 11Required 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 19Example: 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 }; 30