Adding new feature of core PID loop logging

This differs from the normal logging,
as this focuses on the core of the PID loop computations.

All variables within the core pid/ec/pid.cpp pid()
functi

Adding new feature of core PID loop logging

This differs from the normal logging,
as this focuses on the core of the PID loop computations.

All variables within the core pid/ec/pid.cpp pid()
function are now logged, so math can be debugged.

Output is throttled to only log a new line
when it changes, or when 60 seconds have elapsed.

Creates 2 files for each PID loop,
one showing coefficients that were configured for it,
and one showing the variables changing over time.

Enable by --corelogging command line option,
or by creating /etc/thermal.d/corelogging file.

Tested:
Log files appear as expected, when enabled.
No changes noticed, when this feature is disabled.

Signed-off-by: Josh Lehan <krellan@google.com>
Change-Id: I3f37fe918e7cbc6fb885ffa2f268600d5a317d32

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Add debug mode

Description:
1. Could enable debug mode by adding file: /etc/thermal.d/debugging.
$ mkdir /etc/thermal.d
$ touch /etc/thermal.d/debugging
$ systemctl resta

Add debug mode

Description:
1. Could enable debug mode by adding file: /etc/thermal.d/debugging.
$ mkdir /etc/thermal.d
$ touch /etc/thermal.d/debugging
$ systemctl restart phosphor-pid-control

2. Could record fans output PWM, chosen temperature, PID/stepwise output PWM in debug mode.

Design:
1. Create debugging file and restart service to enable debug mode.

2. Check if debug mode is enabled to output fans output PWM, chosen temperature,
PID/stepwise output PWM, and so on.

Test Case:
1. Enable debug mode and check logs: pass

Change-Id: I8527ebcb81e723298ba7e786b4501f986ebd439e
Signed-off-by: Bonnie Lo <Bonnie_Lo@wiwynn.com>

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split parameters for logging and tuning

add a flag to enable/disable tuning: default off
add an option for specifying a folder for outputting logs.

Closes: #10
Signed-off-by: Patrick Venture <ventu

split parameters for logging and tuning

add a flag to enable/disable tuning: default off
add an option for specifying a folder for outputting logs.

Closes: #10
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I43864768f1dee8672f13288d3cf5a0c87c373aed

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add tuning enable variable

Add a variable that when set, enables tuning logging. This variable is
set to false.

Tuning can be enabled via "-t" "--tuning" on the command line.
With a parameter is t

add tuning enable variable

Add a variable that when set, enables tuning logging. This variable is
set to false.

Tuning can be enabled via "-t" "--tuning" on the command line.
With a parameter is the path where to write the logging information.

Change-Id: I6eb8035d56cc3301face21e9375c02fc9fcc5b31
Signed-off-by: Patrick Venture <venture@google.com>

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