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-rw-r--r--Documentation/devicetree/bindings/reserved-memory/ramoops.txt10
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
index b7886fea368c..b571ef6dab0f 100644
--- a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
@@ -42,8 +42,14 @@ Optional properties:
- pmsg-size: size in bytes of log buffer reserved for userspace messages
(defaults to 0: disabled)
-- unbuffered: if present, use unbuffered mappings to map the reserved region
- (defaults to buffered mappings)
+- mem-type: if present, sets the type of mapping is to be used to map the
+ reserved region. mem-type: 0 = write-combined (default), 1 = unbuffered,
+ 2 = cached.
+
+- unbuffered: deprecated, use mem_type instead. If present, and mem_type is
+ not specified, it is equivalent to mem_type = 1 and uses unbuffered mappings
+ to map the reserved region (defaults to buffered mappings mem_type = 0). If
+ both are specified -- "mem_type" overrides "unbuffered".
- max-reason: if present, sets maximum type of kmsg dump reasons to store
(defaults to 2: log Oopses and Panics). This can be set to INT_MAX to