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authorH Hartley Sweeten <hartleys@visionengravers.com>2013-06-11 21:38:59 +0400
committerThierry Reding <thierry.reding@gmail.com>2013-06-21 13:32:51 +0400
commit76abbdde2d95a3807d0dc6bf9f84d03d0dbd4f3d (patch)
tree63a5476d6fbf80ec90b813461ec7ec67ff462684 /drivers/pwm/Kconfig
parent3dd0a909479c1d372341d749b4ff94cd638b57da (diff)
downloadlinux-76abbdde2d95a3807d0dc6bf9f84d03d0dbd4f3d.tar.xz
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>
Diffstat (limited to 'drivers/pwm/Kconfig')
-rw-r--r--drivers/pwm/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index d3fe3205d296..406a4d94ddb9 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -28,6 +28,10 @@ menuconfig PWM
if PWM
+config PWM_SYSFS
+ bool
+ default y if SYSFS
+
config PWM_AB8500
tristate "AB8500 PWM support"
depends on AB8500_CORE && ARCH_U8500