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Only write "1" to the "enable" file when a non-zero pwm width is
requested. Write "0" to the "enable" file when a zero pwm width is
requested.
This fixes a problem on the replicape servo lines that prevented them
from being fully disabled.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Allow use host GPIO pins for non-realtime purposes.
Signed-off-by: Andrey Kunitsyn <blackicebox@gmail.com>
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The beagleboard TI kernel 4.14 and 4.19 contain a commit which change
the device names ("pwm: Create device class for pwm channels") from
pwmN to pwm-${chip}:N. This commit was never merged into the upstream
kernel.
Decrease the number of pwm channels to a more reasonable 16. Increase
the number of pwm chips to 8 since the replicape servo pwm outputs are
on pwmchip4.
Update replicape code to detect appropriate channel.
Signed-off-by: Janne Grunau <janne-gh@jannau.net>
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The replicape servo pins (P9_14/P9_16) are muxed to the SOCs hardware
PWM unit driven by a 13MHz GP timer. They have to be driven by the
linux host mcu. This commits adds hardware PWM support using the linux
sysfs user space interface.
Signed-off-by: Janne Grunau <janne-3d@jannau.net>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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