Lines Matching +full:chip +full:- +full:to +full:- +full:chip

1 .. SPDX-License-Identifier: GPL-2.0
11    encouraged to migrate as soon as possible, as this API will be removed
13    v1 call can be directly translated to a v2 equivalent.
15    This interface will continue to be maintained for the migration period,
16    but new features will only be added to the new API.
20 The API is based around three major objects, the :ref:`gpio-v1-chip`, the
21 :ref:`gpio-v1-line-handle`, and the :ref:`gpio-v1-line-event`.
23 Where "line event" is used in this document it refers to the request that can
26 .. _gpio-v1-chip:
28 Chip  chapter
31 The Chip represents a single GPIO chip and is exposed to userspace using device
34 Each chip supports a number of GPIO lines,
35 :c:type:`chip.lines<gpiochip_info>`. Lines on the chip are identified by an
36 ``offset`` in the range from 0 to ``chip.lines - 1``, i.e. `[0,chip.lines)`.
38 Lines are requested from the chip using either gpio-get-linehandle-ioctl.rst
39 and the resulting line handle is used to access the GPIO chip's lines, or
40 gpio-get-lineevent-ioctl.rst and the resulting line event is used to monitor
44 on the GPIO device file is referred to as ``chip_fd``.
47 ----------
49 The following operations may be performed on the chip:
54    Get Line Handle <gpio-get-linehandle-ioctl>
55    Get Line Event <gpio-get-lineevent-ioctl>
56    Get Chip Info <gpio-get-chipinfo-ioctl>
57    Get Line Info <gpio-get-lineinfo-ioctl>
58    Watch Line Info <gpio-get-lineinfo-watch-ioctl>
59    Unwatch Line Info <gpio-get-lineinfo-unwatch-ioctl>
60    Read Line Info Changed Events <gpio-lineinfo-changed-read>
62 .. _gpio-v1-line-handle:
67 Line handles are created by gpio-get-linehandle-ioctl.rst and provide
68 access to a set of requested lines.  The line handle is exposed to userspace
70 :c:type:`request.fd<gpiohandle_request>` by gpio-get-linehandle-ioctl.rst.
72 Within this documentation, the line handle file descriptor is referred to
76 ----------
83    Get Line Values <gpio-handle-get-line-values-ioctl>
84    Set Line Values <gpio-handle-set-line-values-ioctl>
85    Reconfigure Lines <gpio-handle-set-config-ioctl>
87 .. _gpio-v1-line-event:
92 Line events are created by gpio-get-lineevent-ioctl.rst and provide
93 access to a requested line.  The line event is exposed to userspace
95 :c:type:`request.fd<gpioevent_request>` by gpio-get-lineevent-ioctl.rst.
97 Within this documentation, the line event file descriptor is referred to
101 ----------
108    Get Line Value <gpio-handle-get-line-values-ioctl>
109    Read Line Edge Events <gpio-lineevent-data-read>
116 The :c:type:`struct gpiochip_info<gpiochip_info>` is common to ABI v1 and v2.
118 .. kernel-doc:: include/uapi/linux/gpio.h
131    error-codes