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author | Jonathan Corbet <corbet@lwn.net> | 2016-08-20 22:17:32 +0300 |
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committer | Jonathan Corbet <corbet@lwn.net> | 2016-08-22 23:42:08 +0300 |
commit | dcec3c8c9aea9e779c59f420465381c0f3322913 (patch) | |
tree | f8752c216e37a44941af6a16fda595c0fa4dde0d /Documentation/driver-api/miscellaneous.rst | |
parent | 47cb398dd75a9faa89d0617b55d4cf537935b731 (diff) | |
download | linux-dcec3c8c9aea9e779c59f420465381c0f3322913.tar.xz |
docs: split up the driver book
We don't need to keep it as a single large file anymore; split it up so
that it is easier to manage and the individual sections can be read
directly as plain files.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/driver-api/miscellaneous.rst')
-rw-r--r-- | Documentation/driver-api/miscellaneous.rst | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/driver-api/miscellaneous.rst b/Documentation/driver-api/miscellaneous.rst new file mode 100644 index 000000000000..8da7d115bafc --- /dev/null +++ b/Documentation/driver-api/miscellaneous.rst @@ -0,0 +1,50 @@ +Parallel Port Devices +===================== + +.. kernel-doc:: include/linux/parport.h + :internal: + +.. kernel-doc:: drivers/parport/ieee1284.c + :export: + +.. kernel-doc:: drivers/parport/share.c + :export: + +.. kernel-doc:: drivers/parport/daisy.c + :internal: + +16x50 UART Driver +================= + +.. kernel-doc:: drivers/tty/serial/serial_core.c + :export: + +.. kernel-doc:: drivers/tty/serial/8250/8250_core.c + :export: + +Pulse-Width Modulation (PWM) +============================ + +Pulse-width modulation is a modulation technique primarily used to +control power supplied to electrical devices. + +The PWM framework provides an abstraction for providers and consumers of +PWM signals. A controller that provides one or more PWM signals is +registered as :c:type:`struct pwm_chip <pwm_chip>`. Providers +are expected to embed this structure in a driver-specific structure. +This structure contains fields that describe a particular chip. + +A chip exposes one or more PWM signal sources, each of which exposed as +a :c:type:`struct pwm_device <pwm_device>`. Operations can be +performed on PWM devices to control the period, duty cycle, polarity and +active state of the signal. + +Note that PWM devices are exclusive resources: they can always only be +used by one consumer at a time. + +.. kernel-doc:: include/linux/pwm.h + :internal: + +.. kernel-doc:: drivers/pwm/core.c + :export: + |