samples: edac: Add sample documentation

Add EDAC sample documentation.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>

samples/subsys/edac/README.rst

@@ -0,0 +1,100 @@
+.. _samples_edac:
+
+EDAC Shell Sample
+#################
+
+Overview
+********
+
+This sample demonstrates the EDAC driver API in a simple EDAC shell sample.
+
+Building and Running
+********************
+
+This project can be built and executed on as following example for the
+:ref:`ehl_crb` board:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/subsys/edac
+   :host-os: unix
+   :board: ehl_crb
+   :goals: run
+   :compact:
+
+Sample output
+*************
+
+Getting help
+============
+
+After the application has started help can be read with the following
+command::
+
+   uart:~$ edac -h
+   edac - EDAC information
+   Subcommands:
+     info    :Show EDAC information
+              edac info <subcommands>
+     inject  :Inject ECC error commands
+              edac inject <subcommands>
+
+Help for subcommand info can be read with::
+
+   uart:~$ edac info -h
+   info - Show EDAC information
+          edac info <subcommands>
+   Subcommands:
+     ecc_error     :ECC Error Show / Clear commands
+     parity_error  :Parity Error Show / Clear commands
+
+Injection help can be received with::
+
+   uart:~$ edac inject -h
+   inject - Inject ECC error commands
+            edac inject <subcommands>
+   Subcommands:
+     addr          :Get / Set physical address
+     mask          :Get / Set address mask
+     trigger       :Trigger injection
+     error_type    :Get / Set injection error type
+     disable_nmi   :Disable NMI
+     enable_nmi    :Enable NMI
+     test_default  :Test default injection parameters
+
+Testing Error Injection
+=======================
+
+Set Error Injection parameters with::
+
+   uart:~$ edac inject addr 0x1000
+   Set injection address base to: 0x1000
+
+   uart:~$ edac inject mask 0x7fffffffc0
+   Set injection address mask to 7fffffffc0
+
+   uart:~$ edac inject error_type correctable
+   Set injection error type: correctable
+
+Trigger injection with::
+
+   uart:~$ edac inject trigger
+   Triggering injection
+
+Now Read / Write to the injection address to trigger Error Injection with
+following devmem commands::
+
+   uart:~$ devmem 0x1000 32 0xabcd
+   Mapped 0x1000 to 0x2ffcf000
+
+   Using data width 32
+   Writing value 0xabcd
+
+   uart:~$ devmem 0x1000
+   Mapped 0x1000 to 0x2ffce000
+
+   Using data width 32
+   Read value 0xabcd
+
+We should get the following message on screen indicating an IBECC event::
+
+   Got notification about IBECC event