psutils: Move functions from updater to utils

Move common, utility functions from updater.*pp to utils.*pp. This will
enable those functions to be used by other command line options in the
psutils

psutils: Move functions from updater to utils

Move common, utility functions from updater.*pp to utils.*pp. This will
enable those functions to be used by other command line options in the
psutils tool.

Modify --get-version and --get-model to use the new utility functions.

Also update --get-version to provide a single getVersion() function that
handles the existence of the psu.json file as a low-level implementation
detail.

Tested:
* Verified all automated tests run successfully
* Verified --get-version still works
* With psu.json file
* Without psu.json file
* Verified --get-model still works
* With psu.json file
* Without psu.json file
* Verified --update still gets correct device path, device name, and I2C
bus/address from functions that moved to utils.*pp
* The complete test plan is available at
https://gist.github.com/smccarney/c049e24655d32e22cab9d521d145774a

Change-Id: I51ceca10957dc9a924d0d7516dc29632a6ed82d3
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>

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psutils: Move utility functions to utils.*pp

The files named version.hpp and version.cpp implement the --get-version
option of the psutils tool.

However, the files also contain some utility functio

psutils: Move utility functions to utils.*pp

The files named version.hpp and version.cpp implement the --get-version
option of the psutils tool.

However, the files also contain some utility functions that would be
helpful for implementing other command line options, such as --update or
the planned new option --get-model.

Move the utility functions into new files named utils.hpp and utils.cpp.
The functions will be defined within a namespace named 'utils'.

Tested:
* Verified automated testcases ran successfully
* Verified --get-version option worked correctly
* When using a psu.json file
* When using D-Bus information

Change-Id: If902ee4581fce000af37073ac2e7a7b0ade01f78
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>

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power-utils: Retrieve Firmware Version from sysfs

Added support to retrieve firmware version from sysfs. This required the
following code additions and modifications:

1 - Locate the target PSU obje

power-utils: Retrieve Firmware Version from sysfs

Added support to retrieve firmware version from sysfs. This required the
following code additions and modifications:

1 - Locate the target PSU object and retrieve 'i2cBus' and 'i2cAddress'.
2 - Obtain PMBus interface access.
3 - Read the firmware version from sysfs.

Tested:
The new code was loaded onto a system, and the firmware version was
successfully read from sysfs. Verified getVersion using psu.json file
did not change.

Change-Id: I791788f45e4d682578efbed33e3832a833644dad
Signed-off-by: Faisal Awada <faisal@us.ibm.com>

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power-utils: Add --compare option

This option is to get a latest version from a list of PSU versions.

Due to the --compare option requires a list of strings and only one
option is supported at the

power-utils: Add --compare option

This option is to get a latest version from a list of PSU versions.

Due to the --compare option requires a list of strings and only one
option is supported at the same time, it's easier to switch to CLI11 to
parse the arguments.

Also add --raw option that outputs the text without linefeed.

Tested: Verify both --get-version and --compare works on Witherspoon.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Idec75e3a5699eba8ba587e74824431993fe10c4c

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Add power-utils

The power-utils is added to support psu code manager as vendor-specifc
tool.
In this commit, the util returns the PSU version based on the PSU
inventory path, where the inventory pat

Add power-utils

The power-utils is added to support psu code manager as vendor-specifc
tool.
In this commit, the util returns the PSU version based on the PSU
inventory path, where the inventory path are mapped to the PSU sysfs
device directory based on a json config.

Tested: Verify the version is returned correctly on Witherspoon:
$ ./psutils --getversion \
/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0
01100110
And it returns non-zero when it fails to get the version without
throwing exception.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Ib60f3aa50ce581d55fe4cd62642f30398e25be83

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