mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 06:04:14 +08:00
720688c449
There's no use for this blank line at the end of the file. Remove it. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
50 lines
1.3 KiB
ReStructuredText
50 lines
1.3 KiB
ReStructuredText
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:
|