On Mon, 15 Apr 2019 14:57:04 -0600 Raul E Rangel <rrangel@xxxxxxxxxxxx> wrote: > This is useful to see which EC commands are being executed and when. > > To enable: > > echo 'cros_ec:*' >> /sys/kernel/debug/tracing/set_event Note, you can accomplish the same thing with: echo 1 > /sys/kernel/debug/tracing/events/cros_ec/enable That's the "new" way to do things. The set_event only hangs around for historical (and compatibility) reasons. > > Example: > > /* cros_ec_cmd: version: 0, command: EC_CMD_GET_VERSION */ > /* cros_ec_cmd: version: 0, command: EC_CMD_GET_PROTOCOL_INFO */ > /* cros_ec_cmd: version: 1, command: EC_CMD_GET_CMD_VERSIONS */ > /* cros_ec_cmd: version: 1, command: EC_CMD_USB_PD_CONTROL */ > > Signed-off-by: Raul E Rangel <rrangel@xxxxxxxxxxxx> > Reviewed-by: Ross Zwisler <zwisler@xxxxxxxxxx> For the tracing side of things: Reviewed-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> -- Steve > --- > > Changes in v5: > - Rebased on upstream/master. It turns out upstream/master is missing a > lot of changes to cros_ec_commands.h. > - Replace SYM with SYMBOL in macro name. > > Changes in v4: > - Use the full command name so go to definition continues to work in my > editor. > > Changes in v3: > - Use a macro to avoid duplicating the ec command names. > > Changes in v2: > - Changed comment style to match other cros_ec files. > - Fixed commit tag. > > drivers/platform/chrome/Makefile | 4 +- > drivers/platform/chrome/cros_ec_proto.c | 4 + > drivers/platform/chrome/cros_ec_trace.c | 121 ++++++++++++++++++++++++ > drivers/platform/chrome/cros_ec_trace.h | 51 ++++++++++ > 4 files changed, 179 insertions(+), 1 deletion(-) > create mode 100644 drivers/platform/chrome/cros_ec_trace.c > create mode 100644 drivers/platform/chrome/cros_ec_trace.h
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