diff options
| author | lme00437 | 2012-12-12 10:07:50 +0100 |
|---|---|---|
| committer | Lee Jones | 2013-03-07 12:35:59 +0800 |
| commit | 0577610e0e6b431a1503cc5d78e8178e0dd59948 (patch) | |
| tree | 6c95a09b1edca2dea1a203bbc665a387dbe744dc | |
| parent | 4d3b4aa58ac9e18029c4d0259630414cffd3ba76 (diff) | |
ab8500-fg: Change current calculation
This patch updates the gas gauge constant for electric current
calculation according to hardware specification.
Signed-off-by: Benoit GAUTHIER <benoit.gauthier-xsig@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>
Tested-by: Benoit GAUTHIER <benoit.gauthier-xsig@stericsson.com>
| -rw-r--r-- | drivers/power/ab8500_fg.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c index adc02004e7a3..1601d27ce5d4 100644 --- a/drivers/power/ab8500_fg.c +++ b/drivers/power/ab8500_fg.c @@ -36,7 +36,7 @@ #define MILLI_TO_MICRO 1000 #define FG_LSB_IN_MA 1627 -#define QLSB_NANO_AMP_HOURS_X10 1129 +#define QLSB_NANO_AMP_HOURS_X10 1071 #define INS_CURR_TIMEOUT (3 * HZ) #define SEC_TO_SAMPLE(S) (S * 4) @@ -672,11 +672,11 @@ int ab8500_fg_inst_curr_finalize(struct ab8500_fg *di, int *res) /* * Convert to unit value in mA * Full scale input voltage is - * 66.660mV => LSB = 66.660mV/(4096*res) = 1.627mA + * 63.160mV => LSB = 63.160mV/(4096*res) = 1.542mA * Given a 250ms conversion cycle time the LSB corresponds - * to 112.9 nAh. Convert to current by dividing by the conversion + * to 107.1 nAh. Convert to current by dividing by the conversion * time in hours (250ms = 1 / (3600 * 4)h) - * 112.9nAh assumes 10mOhm, but fg_res is in 0.1mOhm + * 107.1nAh assumes 10mOhm, but fg_res is in 0.1mOhm */ val = (val * QLSB_NANO_AMP_HOURS_X10 * 36 * 4) / (1000 * di->bm->fg_res); |