Hi,

On Tue, Jan 24, 2017 at 11:56:33AM -0800, Liam Breck wrote:

On Sun, Jan 22, 2017 at 2:22 PM, Liam Breck [off-list ref] wrote:

quoted

I think Matt meant the following :-)

Note: nominal-microvolt is not the correct term for termination voltage.
Changed to termination-microvolt
---

Documentation on battery properties that can be defined for
fine tuning fuel gauge state machines.

From: Matt Ranostay <redacted>
Cc: Rob Herring <redacted>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Matt Ranostay <redacted>
---
 .../devicetree/bindings/power/supply/battery.txt   | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/battery.txt

diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt
new file mode 100644
index 000000000000..398b4d622883
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/battery.txt

@@ -0,0 +1,34 @@
+Battery Characteristics
+
+Required Properties:
+ - compatible: Must be "fixed-battery"
+
+Optional Properties:
+ - termination-microvolt: dead battery voltage
+ - design-microwatt-hours: battery design energy
+ - design-microamp-hours: battery design capacity

Two more battery characteristics should be included. Battery chargers
need them (for instance, BQ24190).

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

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

I guess quite a few battery characteristics could be added. Let's
do this once we have a user for them.

Perhaps termination-microvolt should be called terminal-microvolt or
similar to avoid confusion.

Sebastian, did you want to include the other fields from your example?

Let's add properties once we have users for them. I just
used the stuff printed on my Nokia N900's battery as an
example :) I guess chemistry-type may actually be useful
already. I think at least some bq27xxx chips would also
work with LiPo based batteries.

-- Sebastian