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https://github.com/torvalds/linux
synced 2024-09-22 03:55:39 +00:00
76abbdde2d
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>
22 lines
836 B
Makefile
22 lines
836 B
Makefile
obj-$(CONFIG_PWM) += core.o
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obj-$(CONFIG_PWM_SYSFS) += sysfs.o
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obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
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obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
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obj-$(CONFIG_PWM_BFIN) += pwm-bfin.o
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obj-$(CONFIG_PWM_IMX) += pwm-imx.o
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obj-$(CONFIG_PWM_JZ4740) += pwm-jz4740.o
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obj-$(CONFIG_PWM_LPC32XX) += pwm-lpc32xx.o
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obj-$(CONFIG_PWM_MXS) += pwm-mxs.o
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obj-$(CONFIG_PWM_PCA9685) += pwm-pca9685.o
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obj-$(CONFIG_PWM_PUV3) += pwm-puv3.o
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obj-$(CONFIG_PWM_PXA) += pwm-pxa.o
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obj-$(CONFIG_PWM_SAMSUNG) += pwm-samsung.o
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obj-$(CONFIG_PWM_SPEAR) += pwm-spear.o
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obj-$(CONFIG_PWM_TEGRA) += pwm-tegra.o
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obj-$(CONFIG_PWM_TIECAP) += pwm-tiecap.o
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obj-$(CONFIG_PWM_TIEHRPWM) += pwm-tiehrpwm.o
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obj-$(CONFIG_PWM_TIPWMSS) += pwm-tipwmss.o
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obj-$(CONFIG_PWM_TWL) += pwm-twl.o
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obj-$(CONFIG_PWM_TWL_LED) += pwm-twl-led.o
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obj-$(CONFIG_PWM_VT8500) += pwm-vt8500.o
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