Thread (6 messages) 6 messages, 3 authors, 2021-02-24

Re: [PATCH 1/3] power: supply: bq27xxx: fix sign of current_now for newer ICs

From: Andreas Kemnade <andreas@kemnade.info>
Date: 2021-02-23 14:51:21
Also in: lkml

On Tue, 23 Feb 2021 15:11:20 +0100
Matthias Schiffer [off-list ref] wrote:
Commit cd060b4d0868 ("power: supply: bq27xxx: fix polarity of current_now")
changed the sign of current_now for all bq27xxx variants, but on BQ28Z610
I'm now seeing negated values *with* that patch.

The GTA04/Openmoko device that was used for testing uses a BQ27000 or
BQ27010 IC, so I assume only the BQ27XXX_O_ZERO code path was incorrect.
Revert the behaviour for newer ICs.

Fixes: cd060b4d0868 "power: supply: bq27xxx: fix polarity of current_now"
Signed-off-by: Matthias Schiffer <redacted>
---

@Andreas Kemnade: It would be great to get a confirmation that the
Openmoko battery indeed uses BQ27000/BQ27010 - I was having some trouble
finding that information.
I can confirm that.
here is the corresponding schematic:

http://people.openmoko.org/tony_tu/GTA02/hardware/GTA02/CT-GTA02.pdf

Regards,
Andreas
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