Add a usage document for the 'rng' u-boot command.
Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
Changes since V2: None
doc/usage/index.rst | 1 +
doc/usage/rng.rst | 25 +++++++++++++++++++++++++
2 files changed, 26 insertions(+)
create mode 100644 doc/usage/rng.rst
diff --git a/doc/usage/index.rst b/doc/usage/index.rst
index 0aacf531b2..5712a924ae 100644
--- a/doc/usage/index.rst
+++ b/doc/usage/index.rst
@@ -45,6 +45,7 @@ Shell commands
pstore
qfw
reset
+ rng
sbi
sf
scp03
diff --git a/doc/usage/rng.rst b/doc/usage/rng.rst
new file mode 100644
index 0000000000..87758f7d66
--- /dev/null
+++ b/doc/usage/rng.rst
@@ -0,0 +1,25 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+rng command
+===========
+
+Synopsis
+--------
+
+::
+
+ rng [devnum [n]]
+
+Description
+-----------
+
+The *rng* command reads the random number generator(RNG) device and
+prints the random bytes read on the console.
+
+devnum
+ The RNG device from which the random bytes are to be
+ read. Defaults to 0.
+
+n
+ Number of random bytes to be read and displayed on the
+ console. Default value is 0x40.
--
2.25.1
