rpm

Installation

1. Run sudo make install

Example usage

cat /sys/class/rpm/rpm0/rpm 

Example device tree entry

rpm_fan0: rpm_fan0 {
	compatible = "sentinel,rpm-gpio";
	rpm-gpios = <&gpio 7 1>; /* 1 = GPIO_ACTIVE_LOW */
	pulses-per-revolution = <2>;
	hysteresis = <15>; /* optional: number of pulse periods averaged for the reported rpm value, defaults to 15 */
	enable-pull-up; /* optional: enable the internal pull-up */
	status = "okay";
};