linux-kernel - [PATCH v3 1/7] media: add glossary.rst with a glossary of terms used at V4L2 spec

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Message-Id: <ad395bd4b44f668ff5677eb160fa9d159362102b.1503673702.git.mchehab@s-opensource.com>
Date:   Fri, 25 Aug 2017 12:11:51 -0300
From:   Mauro Carvalho Chehab <mchehab@...pensource.com>
To:     Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
        Hans Verkuil <hans.verkuil@...co.com>
Subject: [PATCH v3 1/7] media: add glossary.rst with a glossary of terms used at V4L2 spec

Add a glossary of terms for V4L2, as several concepts are complex
enough to cause misunderstandings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
---
 Documentation/media/uapi/v4l/glossary.rst | 95 +++++++++++++++++++++++++++++++
 Documentation/media/uapi/v4l/v4l2.rst     |  1 +
 2 files changed, 96 insertions(+)
 create mode 100644 Documentation/media/uapi/v4l/glossary.rst

diff --git a/Documentation/media/uapi/v4l/glossary.rst b/Documentation/media/uapi/v4l/glossary.rst
new file mode 100644
index 000000000000..2f1b3cdeb635
--- /dev/null
+++ b/Documentation/media/uapi/v4l/glossary.rst
@@ -0,0 +1,95 @@
+========
+Glossary
+========
+
+.. note
+
+   This goal of section is to standardize the terms used within the V4L2
+   documentation. It is written incrementally as they're standardized at
+   the V4L2 documentation. So, it is an incomplete Work In Progress.
+
+.. Please keep the glossary entries in alphabetical order
+
+Bridge driver
+   - The same as :ref:`main_v4l2_driver`.
+
+.. _device_node:
+
+Device Node
+   - A character device node at the file system used to control and do
+     input/output data transfers to a Kernel driver.
+
+Driver
+   - The part of the Linux Kernel that implements support
+     for a hardware component.
+
+Inter-Integrated Circuit - I²C
+   - A  multi-master, multi-slave, packet switched, single-ended,
+     serial computer bus used to control V4L2 sub-devices
+
+Hardware component
+   - a subset of the media hardware.
+
+.. _hardware_peripheral:
+
+Hardware peripheral
+   - A group of hardware components that together make a larger
+     user-facing functional peripheral. For instance the SoC ISP IP
+     cores and external camera sensors together make a
+     camera hardware peripheral.
+     Also known as peripheral.
+
+Hardware peripheral control
+   - Type of control that it is possible for a V4L2 peripheral.
+     See :ref:`v4l2_hardware_control`.
+
+.. _main_v4l2_driver:
+
+Peripheral
+   - The same as :ref:`hardware_peripheral`.
+
+Media Controller
+   - An API used to identify the hardware components.
+     See :ref:`media_controller`.
+
+MC-centric
+   - V4L2 hardware that requires a Media controller to be controlled.
+     See :ref:`v4l2_hardware_control`.
+
+SMBus
+   - A subset of I²C, with defines a stricter usage of the bus.
+
+Serial Peripheral Interface Bus - SPI
+   - Synchronous serial communication interface specification used for
+     short distance communication, primarily in embedded systems.
+
+Sub-device hardware components
+   - hardware components that aren't controlled by the
+     V4L2 main driver.
+
+V4L2 device node
+   - A :ref:`device_node` that it is associated to a main V4L2 driver,
+     as specified at :ref:`v4l2_device_naming`.
+
+V4L2 hardware
+   - A hardware used to on a media device supported by the V4L2
+     subsystem.
+
+V4L2 hardware control
+   - The type of hardware control that a device supports.
+     See :ref:`v4l2_hardware_control`.
+
+V4L2 main driver
+   - The V4L2 device driver that implements the main logic to talk with
+     the V4L2 hardware.
+     Also known as bridge driver.
+     See :ref:`v4l2_hardware_control`.
+
+V4L2 sub-device
+   - part of the media hardware that it is implemented by a device
+     driver that is not part of the main V4L2 driver.
+     See :ref:`subdev`.
+
+Vdev-centric
+   - V4L2 hardware that it is controlled via V4L2 device nodes.
+     See :ref:`v4l2_hardware_control`.
diff --git a/Documentation/media/uapi/v4l/v4l2.rst b/Documentation/media/uapi/v4l/v4l2.rst
index f52a11c949d3..1ee4b86d18e1 100644
--- a/Documentation/media/uapi/v4l/v4l2.rst
+++ b/Documentation/media/uapi/v4l/v4l2.rst
@@ -31,6 +31,7 @@ This part describes the Video for Linux API version 2 (V4L2 API) specification.
     videodev
     capture-example
     v4l2grab-example
+    glossary
     biblio
 
 
-- 
2.13.3