Thread (43 messages) 43 messages, 6 authors, 2017-03-14

[PATCH v3 01/18] dt-bindings: power: battery: add constant-charge-current property

From: Liam Breck <hidden>
Date: 2017-02-15 00:48:06
Also in: linux-devicetree, linux-iio, linux-pm, lkml

On Tue, 14 Feb 2017 10:40:55 +0100 Quentin Schulz wrote:
This adds the constant-charge-current property to the list of optional
properties of the battery.

The constant charge current is critical for batteries as they can't
handle all charge currents.

Signed-off-by: Quentin Schulz <redacted>
---

added in v3

 Documentation/devicetree/bindings/power/supply/battery.txt | 2 ++
Is constant-charge-current dependent on the battery (e.g. capacity, nominal voltage, etc) or the 
system (charger chip, input current/voltage, etc)?

It belongs in Doc.../power/supply/battery.txt if it's a characteristic of the battery.

Note, this page asserts that constant-current charging applies to NiMH batteries:
http://power-topics.blogspot.com/2016/05/constant-voltage-constant-current.html

Related properties to be added to battery.txt near-future in a patchset for the BQ24190 
charger are as follows. These are not currently in enum power_supply_property, so the actual names 
are still to be decided.

precharge-current-microamp:
   maximum charge current during precharge phase (typically 20% of battery capacity)

termination-current-microamp (or endcharge-current):
   a charge cycle terminates when the battery voltage is above recharge threshold,
   and the current is below this setting (typically 10% of battery capacity)


~.~
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