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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 22:14:56 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 22:14:56 +0400
commit34ae0a6f05aee9f51fca17001b4a90703d434ae1 (patch)
tree3ccc8bedae647eb37f46e8ff9f39cdcd84a2f2ac /Documentation/ABI
parent7d3107d26b522a0fe92af6279256fa65fe3db771 (diff)
parentb388f15fd14c3ae62deb9a059464aa99b524ea4a (diff)
downloadlinux-34ae0a6f05aee9f51fca17001b4a90703d434ae1.tar.xz
Merge tag 'for-3.11-rc1' of git://gitorious.org/linux-pwm/linux-pwm
Pull pwm changes from Thierry Reding: "A new driver supports driving PWM signals using the TPU unit found on various Renesas SoCs. Furthermore support is added for the NXP PCA9685 LED controller. Another big chunk is the sysfs interface which has been in the works for quite some time. The remaining patches are a random assortment of cleanups and fixes" * tag 'for-3.11-rc1' of git://gitorious.org/linux-pwm/linux-pwm: pwm: pwm-tiehrpwm: Use clk_enable/disable instead clk_prepare/unprepare. pwm: pca9685: Fix wrong argument to set MODE1_SLEEP bit pwm: renesas-tpu: Add MODULE_ALIAS to make module auto loading work pwm: renesas-tpu: fix return value check in tpu_probe() pwm: Add Renesas TPU PWM driver pwm: Add sysfs interface pwm: Fill in missing .owner fields pwm: add pca9685 driver pwm: atmel-tcb: prepare clk before calling enable pwm: devm: alloc correct pointer size pwm: mxs: Let device core handle pinctrl MAINTAINERS: Update PWM subsystem entry
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-class-pwm79
1 files changed, 79 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-pwm b/Documentation/ABI/testing/sysfs-class-pwm
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+What: /sys/class/pwm/
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ The pwm/ class sub-directory belongs to the Generic PWM
+ Framework and provides a sysfs interface for using PWM
+ channels.
+
+What: /sys/class/pwm/pwmchipN/
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ A /sys/class/pwm/pwmchipN directory is created for each
+ probed PWM controller/chip where N is the base of the
+ PWM chip.
+
+What: /sys/class/pwm/pwmchipN/npwm
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ The number of PWM channels supported by the PWM chip.
+
+What: /sys/class/pwm/pwmchipN/export
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Exports a PWM channel from the PWM chip for sysfs control.
+ Value is between 0 and /sys/class/pwm/pwmchipN/npwm - 1.
+
+What: /sys/class/pwm/pwmchipN/unexport
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Unexports a PWM channel.
+
+What: /sys/class/pwm/pwmchipN/pwmX
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ A /sys/class/pwm/pwmchipN/pwmX directory is created for
+ each exported PWM channel where X is the exported PWM
+ channel number.
+
+What: /sys/class/pwm/pwmchipN/pwmX/period
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Sets the PWM signal period in nanoseconds.
+
+What: /sys/class/pwm/pwmchipN/pwmX/duty_cycle
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Sets the PWM signal duty cycle in nanoseconds.
+
+What: /sys/class/pwm/pwmchipN/pwmX/polarity
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Sets the output polarity of the PWM signal to "normal" or
+ "inversed".
+
+What: /sys/class/pwm/pwmchipN/pwmX/enable
+Date: May 2013
+KernelVersion: 3.11
+Contact: H Hartley Sweeten <hsweeten@visionengravers.com>
+Description:
+ Enable/disable the PWM signal.
+ 0 is disabled
+ 1 is enabled