diff options
| author | Nicolin Chen <nicoleotsuka@gmail.com> | 2018-10-09 14:42:19 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2018-10-11 20:07:35 -0700 |
| commit | 61b8ab2c5481dc48e8df9a13c297636c1d369554 (patch) | |
| tree | 4d7f55698a4e0f458101a3e683719969c4af4f65 /MAINTAINERS | |
| parent | d4b0166d28a8966ab6938d8bb7360c383b519256 (diff) | |
| download | linux-61b8ab2c5481dc48e8df9a13c297636c1d369554.tar.bz2 | |
hwmon: (core) Add trace events to _attr_show/store functions
Trace events are useful for people who collect data from the
Ftrace outputs. There're people who analyse the relationship
of cpufreq, thermal and hwmon (power/voltage/current) using
the convenient and timestamped Ftrace outputs, while unlike
cpufreq and thermal subsystems the hwmon does not have trace
events supported yet.
So this patch adds initial trace events for the hwmon core.
To call hwmon_attr_base() for aligned attr index numbers, it
also moves the function upward.
Ftrace outputs:
...: hwmon_attr_show_string: index=2, attr_name=in2_label, val=VDD_5V
...: hwmon_attr_show: index=2, attr_name=in2_input, val=5112
...: hwmon_attr_show: index=2, attr_name=curr2_input, val=440
Note that the _attr_show and _attr_store functions are tied
to the _with_info API. So a hwmon driver requiring the trace
events feature should use _with_info API to register a hwmon
device.
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index c0ca7f74f8e8..20a64eb40b55 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6454,6 +6454,7 @@ F: Documentation/devicetree/bindings/hwmon/ F: Documentation/hwmon/ F: drivers/hwmon/ F: include/linux/hwmon*.h +F: include/trace/events/hwmon*.h HARDWARE RANDOM NUMBER GENERATOR CORE M: Matt Mackall <mpm@selenic.com> |