linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2016-06-10	pwm: sysfs: Add PWM capture support	Lee Jones	1	-0/+9
	Allow a user to read PWM capture results from sysfs. To start a capture and read the result, simply read the file: $ cat $PWMCHIP/capture The output format is "<period> <duty cycle>". Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-21	pwm: Add sysfs interface	H Hartley Sweeten	1	-0/+79
	Add a simple sysfs interface to the generic PWM framework. /sys/class/pwm/ `-- pwmchipN/ for each PWM chip \|-- export (w/o) ask the kernel to export a PWM channel \|-- npwm (r/o) number of PWM channels in this PWM chip \|-- pwmX/ for each exported PWM channel \| \|-- duty_cycle (r/w) duty cycle (in nanoseconds) \| \|-- enable (r/w) enable/disable PWM \| \|-- period (r/w) period (in nanoseconds) \| `-- polarity (r/w) polarity of PWM (normal/inversed) `-- unexport (w/o) return a PWM channel to the kernel Based on work by Lars Poeschel. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Lars Poeschel <poeschel@lemonage.de> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>