power: supply: max17042_battery: mAh readings depend on r_sns value

The PROP_CHARGE_FULL code was hardcoded for the default sense
resistor of 0.010 Ohm, make it use r_sns which contains the
actual sense resistor value in micro-Ohms instead.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
index 0e94349..37e987f 100644 (file)
--- a/drivers/power/supply/max17042_battery.c
+++ b/drivers/power/supply/max17042_battery.c
@@ -220,6 +220,7 @@ static int max17042_get_property(struct power_supply *psy,
        struct regmap *map = chip->regmap;
        int ret;
        u32 data;
+       u64 data64;
 
        if (!chip->init_complete)
                return -EAGAIN;
@@ -309,7 +310,9 @@ static int max17042_get_property(struct power_supply *psy,
                if (ret < 0)
                        return ret;
 
-               val->intval = data * 1000 / 2;
+               data64 = data * 5000000ll;
+               do_div(data64, chip->pdata->r_sns);
+               val->intval = data64;
                break;
        case POWER_SUPPLY_PROP_CHARGE_COUNTER:
                ret = regmap_read(map, MAX17042_QH, &data);