greybus: add support for the log protocol

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Add support for the new Log class/protocol. This protocol allows modules
to send their internal logging messages to the AP in order to make
module debugging easier.

The protocol is, for now, composed a single module-initiated request.
This request contains a message and associated length. The message is
integrated in the kernel log with dev_dbg(). In order to be displayed
with 'dmesg', the following command needs to be entered first:

$ echo "file log.c +p" > /sys/kernel/debug/dynamic_debug/control

The major portion of this file was initially written by Greg KH.

Signed-off-by: Joel Porquet <porquet_joel@projectara.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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This commit is contained in:

Joel Porquet 2016-06-24 14:41:36 -07:00 • committed by Greg Kroah-Hartman

parent 6f7f2ae5df

commit c0e65d026c

4 changed files with 150 additions and 0 deletions

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2

drivers/staging/greybus/Makefile

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2

drivers/staging/greybus/greybus_manifest.h

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14

drivers/staging/greybus/greybus_protocols.h

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132

drivers/staging/greybus/log.c

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