linux-kernel - [RFC PATCH 7/7] dt-bindings: ramtrace: Add ramtrace DT node

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Message-Id: <b65b3116d90e7e5969ad6c1509a24e04f39ee4e9.1599072725.git.nachukannan@gmail.com>
Date:   Wed,  2 Sep 2020 13:00:22 -0700
From:   Nachammai Karuppiah <nachukannan@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>
Cc:     joel@...lfernandes.org, linux-kernel@...r.kernel.org,
        Nachammai Karuppiah <nachukannan@...il.com>
Subject: [RFC PATCH 7/7] dt-bindings: ramtrace: Add ramtrace DT node

Add ramtrace as child node of /reserved-memory.

Signed-off-by: Nachammai Karuppiah <nachukannan@...il.com>
---
 .../devicetree/bindings/reserved-memory/ramtrace.txt        | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reserved-memory/ramtrace.txt

diff --git a/Documentation/devicetree/bindings/reserved-memory/ramtrace.txt b/Documentation/devicetree/bindings/reserved-memory/ramtrace.txt
new file mode 100644
index 0000000..0a8515c
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/ramtrace.txt
@@ -0,0 +1,13 @@
+Ramtrace trace events logger
+============================
+
+ramtrace provides persistent RAM storage for ring buffer in which the trace
+events are recorded, so they can be recovered after a reboot. This is a
+child-node of "/reserved-memory", and is named "ramtrace" after the backend,
+rather than "pstore" which is the subsystem.
+
+Required properties:
+
+- compatible: must be "ramtrace"
+
+- reg: region of memory that is preserved between reboots
-- 
2.7.4