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author | Guodong Xu <guodong.xu@linaro.org> | 2017-06-06 14:24:46 +0800 |
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committer | Guodong Xu <guodong.xu@linaro.org> | 2017-06-06 14:24:46 +0800 |
commit | bf728f2dc0c27162d86d754883f55b0dc52e870f (patch) | |
tree | 8546792fddff97497c3a7df62e71a500363e01fe /Documentation/devicetree | |
parent | a236825169cb921a8e0da4ec37b32f7942e24d2b (diff) | |
parent | 3c74104851e164da107a39047643250c0cdd72ef (diff) |
Merge branch 'working-hikey-tracking-pstore-v4.4' into working-hikey-mainline-rebase-v4.4-c2017-06-06-14-24-39
* working-hikey-tracking-pstore-v4.4:
pstore-ram: add Device Tree bindings
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r-- | Documentation/devicetree/bindings/misc/ramoops.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/misc/ramoops.txt b/Documentation/devicetree/bindings/misc/ramoops.txt new file mode 100644 index 000000000000..5a475fae4aab --- /dev/null +++ b/Documentation/devicetree/bindings/misc/ramoops.txt @@ -0,0 +1,43 @@ +Ramoops oops/panic logger +========================= + +ramoops provides persistent RAM storage for oops and panics, so they can be +recovered after a reboot. + +Parts of this storage may be set aside for other persistent log buffers, such +as kernel log messages, or for optional ECC error-correction data. The total +size of these optional buffers must fit in the reserved region. + +Any remaining space will be used for a circular buffer of oops and panic +records. These records have a configurable size, with a size of 0 indicating +that they should be disabled. + + +Required properties: + +- compatible: must be "ramoops" + +- memory-region: phandle to a region of memory that is preserved between reboots + + +Optional properties: + +- ecc-size: enables ECC support and specifies ECC buffer size in bytes + (defaults to no ECC) + +- record-size: maximum size in bytes of each dump done on oops/panic + (defaults to 0) + +- console-size: size in bytes of log buffer reserved for kernel messages + (defaults to 0) + +- ftrace-size: size in bytes of log buffer reserved for function tracing and + profiling (defaults to 0) + +- pmsg-size: size in bytes of log buffer reserved for userspace messages + (defaults to 0) + +- unbuffered: if present, use unbuffered mappings to map the reserved region + (defaults to buffered mappings) + +- no-dump-oops: if present, only dump panics (defaults to panics and oops) |