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| author |   Raul E Rangel <rrangel@chromium.org> | 2019-04-16 15:03:28 -0600 |
|---|---|---|
| committer |   Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2019-04-17 10:29:34 +0200 |
| commit | 58a2109f6eb46b2952e2ce3fe776ce02c0c540dd (patch) | |
| tree | 7d97942d8f269a70b31e2de50c3fbcfde824e721 /drivers/platform/chrome/cros_ec_proto.c | |
| parent | platform/chrome: cros_ec_debugfs: Use cros_ec_cmd_xfer_status helper (diff) | |
| download | linux-dev-58a2109f6eb46b2952e2ce3fe776ce02c0c540dd.tar.xz linux-dev-58a2109f6eb46b2952e2ce3fe776ce02c0c540dd.zip | |
platform/chrome: cros_ec_proto: Add trace event to trace EC commands
This is useful to see which EC commands are being executed and when.
To enable:
echo 1 > /sys/kernel/debug/tracing/events/cros_ec/enable
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
The list of current commands is generated using the following script:
sed -n 's/^#define \(EC_CMD_[[:alnum:]_]*\)\s.*/\tTRACE_SYMBOL(\1),\\/p' include/linux/mfd/cros_ec_commands.h
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Diffstat (limited to 'drivers/platform/chrome/cros_ec_proto.c')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 3bb954997ebc..171475862ede 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -10,6 +10,8 @@ #include <linux/slab.h> #include <asm/unaligned.h> +#include "cros_ec_trace.h" + #define EC_COMMAND_RETRIES 50 static int prepare_packet(struct cros_ec_device *ec_dev, @@ -51,6 +53,8 @@ static int send_command(struct cros_ec_device *ec_dev, int ret; int (*xfer_fxn)(struct cros_ec_device *ec, struct cros_ec_command *msg); + trace_cros_ec_cmd(msg); + if (ec_dev->proto_version > 2) xfer_fxn = ec_dev->pkt_xfer; else |