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80dd7ae1 |
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13-Jul-2022 |
Lee Jones <lee@kernel.org> |
docs: ABI: sysfs-class-pwm: Update Lee Jones' email address Going forward, I'll be using my kernel.org for upstream work. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20220714112533.539910-5-lee@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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24e83d41 |
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16-Sep-2021 |
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
ABI: sysfs-class-pwm: use wildcards on What definitions An "N" upper letter is not a wildcard, nor can easily be identified by script, specially since the USB sysfs define things like. bNumInterfaces. Use, instead, <N>, in order to let script/get_abi.pl to convert it into a Regex. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/eb3edca0f3cf693d8d28ee7bd00339cac2039014.1631782432.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1a366fe9 |
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08-Jun-2016 |
Lee Jones <lee.jones@linaro.org> |
pwm: sysfs: Add PWM capture support 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>
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76abbdde |
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11-Jun-2013 |
H Hartley Sweeten <hartleys@visionengravers.com> |
pwm: Add sysfs interface 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>
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