linux-kernel - [PATCH] power: bq27xxx: fix polarity of current

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Date:   Fri,  4 Dec 2020 15:49:50 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     pali@...nel.org, dmurphy@...com, sre@...nel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH] power: bq27xxx: fix polarity of current_now

current_now has to be negative during discharging and positive during
charging, the behavior seen is the other way round.

Tested on GTA04 with Openmoko battery

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 drivers/power/supply/bq27xxx_battery.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 315e0909e6a4..3ecc18b01d49 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -1789,7 +1789,7 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
 
 	if (di->opts & BQ27XXX_O_ZERO) {
 		flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
-		if (flags & BQ27000_FLAG_CHGS) {
+		if (!(flags & BQ27000_FLAG_CHGS)) {
 			dev_dbg(di->dev, "negative current!\n");
 			curr = -curr;
 		}
@@ -1797,7 +1797,7 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
 		val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
 	} else {
 		/* Other gauges return signed value */
-		val->intval = (int)((s16)curr) * 1000;
+		val->intval = -(int)((s16)curr) * 1000;
 	}
 
 	return 0;
-- 
2.20.1