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>

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);