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58a2109f6e
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>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Trace events for the ChromeOS Embedded Controller
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*
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* Copyright 2019 Google LLC.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM cros_ec
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#if !defined(_CROS_EC_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
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#define _CROS_EC_TRACE_H_
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#include <linux/types.h>
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#include <linux/mfd/cros_ec.h>
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(cros_ec_cmd_class,
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TP_PROTO(struct cros_ec_command *cmd),
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TP_ARGS(cmd),
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TP_STRUCT__entry(
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__field(uint32_t, version)
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__field(uint32_t, command)
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),
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TP_fast_assign(
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__entry->version = cmd->version;
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__entry->command = cmd->command;
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),
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TP_printk("version: %u, command: %s", __entry->version,
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__print_symbolic(__entry->command, EC_CMDS))
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);
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DEFINE_EVENT(cros_ec_cmd_class, cros_ec_cmd,
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TP_PROTO(struct cros_ec_command *cmd),
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TP_ARGS(cmd)
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);
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#endif /* _CROS_EC_TRACE_H_ */
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/* this part must be outside header guard */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE cros_ec_trace
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#include <trace/define_trace.h>
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