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authorLee Jones <lee.jones@linaro.org>2016-06-08 10:21:25 +0100
committerThierry Reding <thierry.reding@gmail.com>2016-06-10 16:01:40 +0200
commit1a366fe9153f445e950a7a344932b7419aa83094 (patch)
treeb6d66b37c862446d280a03179c178913d9090aad /Documentation
parent3a3d1a4e32ab47323d7b8c8b7631a8d36a3098b2 (diff)
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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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-class-pwm9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-pwm b/Documentation/ABI/testing/sysfs-class-pwm
index c479d77b67c5..c20e61354561 100644
--- a/Documentation/ABI/testing/sysfs-class-pwm
+++ b/Documentation/ABI/testing/sysfs-class-pwm
@@ -77,3 +77,12 @@ Description:
Enable/disable the PWM signal.
0 is disabled
1 is enabled
+
+What: /sys/class/pwm/pwmchipN/pwmX/capture
+Date: June 2016
+KernelVersion: 4.8
+Contact: Lee Jones <lee.jones@linaro.org>
+Description:
+ Capture information about a PWM signal. The output format is a
+ pair unsigned integers (period and duty cycle), separated by a
+ single space.