Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
Documentation/user/nvmem.rst | 30 ++++++++++++++++++++++++++++++
Documentation/user/user-manual.rst | 1 +
2 files changed, 31 insertions(+)
create mode 100644 Documentation/user/nvmem.rst
diff --git a/Documentation/user/nvmem.rst b/Documentation/user/nvmem.rst
new file mode 100644
index 0000000000..f860b80fd5
--- /dev/null
+++ b/Documentation/user/nvmem.rst
@@ -0,0 +1,30 @@
+NVMEM subsystem
+===============
+
+The NVMEM framework was partially ported from linux kernel.
+
+Except from linux kernel documentation:
+*NVMEM* is the abbreviation for Non Volatile Memory layer. It is used to
+retrieve configuration of SOC or Device specific data from non volatile
+memories like eeprom, efuses and so on.
+
+Userspace binary interface
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Userspace can read/write the raw NVMEM file located at
+/dev/nvmem*
+
+.. code-block:: sh
+
+ md -s /dev/nvmem0 0+4
+ 00000000: 00000000 ....
+
+ mw -d /dev/nvmem0 0 0x12345678
+
+ md -s /dev/nvmem0 0+4
+ 00000000: 12345678 xV4.
+
+DeviceTree Binding
+^^^^^^^^^^^^^^^^^^
+
+See linux kernel Documentation/devicetree/bindings/nvmem/nvmem.txt
diff --git a/Documentation/user/user-manual.rst b/Documentation/user/user-manual.rst
index 791c8e0979..b66782ef6a 100644
--- a/Documentation/user/user-manual.rst
+++ b/Documentation/user/user-manual.rst
@@ -34,6 +34,7 @@ Contents:
system-reset
state
random
+ nvmem
* :ref:`search`
* :ref:`genindex`
--
2.11.0
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