[RFC PATCH v3 01/16] docs: cxl: Add basic documentation

[Ben Widawsky <ben.widawsky@intel.com>]

This starts a new cxl directory because CXL is a new bus and it is
expected that the documentation will grow large over time. Currently
only memory devices are documented as they are all that's supported.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
 Documentation/cxl/index.rst          | 12 ++++++++++++
 Documentation/cxl/memory-devices.rst | 15 +++++++++++++++
 Documentation/index.rst              |  1 +
 3 files changed, 28 insertions(+)
 create mode 100644 Documentation/cxl/index.rst
 create mode 100644 Documentation/cxl/memory-devices.rst

diff --git a/Documentation/cxl/index.rst b/Documentation/cxl/index.rst
new file mode 100644
index 000000000000..036e49553542
--- /dev/null
+++ b/Documentation/cxl/index.rst
@@ -0,0 +1,12 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+====================
+Compute Express Link
+====================
+
+.. toctree::
+   :maxdepth: 1
+
+   memory-devices
+
+.. only::  subproject and html
diff --git a/Documentation/cxl/memory-devices.rst b/Documentation/cxl/memory-devices.rst
new file mode 100644
index 000000000000..aa4262280c67
--- /dev/null
+++ b/Documentation/cxl/memory-devices.rst
@@ -0,0 +1,15 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: <isonum.txt>
+
+===================================
+Compute Express Link Memory Devices
+===================================
+
+A Compute Express Link Memory Device is a CXL component that implements the
+CXL.mem protocol. It contains some amount of volatile memory, persistent memory,
+or both.
+
+Driver Infrastructure
+=====================
+
+This sections covers the driver infrastructure for a CXL memory device.
diff --git a/Documentation/index.rst b/Documentation/index.rst
index 5888e8a7272f..7e5ab77264e9 100644
--- a/Documentation/index.rst
+++ b/Documentation/index.rst
@@ -137,6 +137,7 @@ needed).
    misc-devices/index
    scheduler/index
    mhi/index
+   cxl/index
 
 Architecture-agnostic documentation
 -----------------------------------
-- 
2.30.0