Epi-/Pycardium function to read battery discharge current

Add an epicardium function to read the battery discharge current (the currently available epic_read_battery_current function only reads the charging current according to the PMIC datasheet).

+ fix incorrect AMUX channel in the epic_read_chargein_current

+ add a missing case (battery discharge current) to the AMUX read switch

+ documentation improvements

Looks good to me! Thanks for keeping our codebase clean.

However, I'm only a bot - so a human will still have to approve this request.

added 3-Epicardium 6 - Needs Review labels

assigned to @rahix

changed milestone to %v1.10

mentioned in merge request !264

cc @ole, can you take a look whether this will be influenced by your planned changes to the PMIC configuration? ref #34

resolved all threads

added 1 commit

• c02c7e64 - Expose read battery discharge function to pycardium

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Added the function to pycardium as well

changed title from Epicardium function to read battery discharge current to Epi-/Pycardium function to read battery discharge current

changed the description

added 29 commits

• c02c7e64...b8803880 - 26 commits from branch card10:master
• fa9518b4 - fix(pmic): Use correct channel for reading input charge current + add missing AMUX case
• b39aa5f2 - feat(pmic): Epicardium function to read battery discharge current
• 71fc1160 - Expose read battery discharge function to pycardium

Compare with previous version

added 6 - Needs Testing label and removed 6 - Needs Review label

added 6 - Changes Requested label and removed 6 - Needs Testing label

changed milestone to %v1.11

added 2 commits

• 9016c137 - feat(pmic): Epicardium function to read battery discharge current
• edfda2c9 - Expose read battery discharge function to pycardium

Compare with previous version

resolved all threads

added 6 - Needs Testing label and removed 6 - Changes Requested label