power: supply: cpcap-charger: Fix charge voltage configuration
authorTony Lindgren <tony@atomide.com>
Thu, 4 May 2017 00:15:30 +0000 (17:15 -0700)
committerSebastian Reichel <sre@kernel.org>
Thu, 4 May 2017 15:51:44 +0000 (17:51 +0200)
commit3ae5f06681fc0e9ce6a0ac4f909aa7695e1f3228
tree46e84f95bd42348a8c62bb79f7dbc7b771736077
parent4f700a5285dc8f9dde4ad02542bc42fe9f97cfcf
power: supply: cpcap-charger: Fix charge voltage configuration

We have the charge voltage wrong, it should be 4.35V instead of 4.2V.
This will cause the battery to never get fully charged.

I noticed this when looking at the Andoid kernel battery and charger
status for a fully charged battery:

POWER_SUPPLY_VOLTAGE_NOW=4351000

Also the battery on droid 4 says "4.35, 1735/1785mAh (min/typ),
6.6/6.8 Wh (min/typ)". Presumably the 4.35 on the battery is the
charge voltage.

And finally, on Android the CPCAP CRM register is set to 0x03b5 where
the b is the charge voltage.

Let's fix the charge voltage define and update the charge configuration
to use the 4.35V setting.

Fixes: 0c9888e3c192 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
drivers/power/supply/cpcap-charger.c