[PATCH 39/40] ab8500-fg: Change current calculation
From: lme00437 This patch updates the gas gauge constant for electric current calculation according to hardware specification. Signed-off-by: Benoit GAUTHIER Signed-off-by: Lee Jones Reviewed-by: Marcus COOPER Reviewed-by: Philippe LANGLAIS Tested-by: Benoit GAUTHIER --- drivers/power/ab8500_fg.c |8 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c index 7de5333..4968061 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_X101129 +#define QLSB_NANO_AMP_HOURS_X101071 #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); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 39/40] ab8500-fg: Change current calculation
From: lme00437 benoit.gauthier-no...@stericsson.com This patch updates the gas gauge constant for electric current calculation according to hardware specification. Signed-off-by: Benoit GAUTHIER benoit.gauthier-x...@stericsson.com Signed-off-by: Lee Jones lee.jo...@linaro.org Reviewed-by: Marcus COOPER marcus.xm.coo...@stericsson.com Reviewed-by: Philippe LANGLAIS philippe.langl...@stericsson.com Tested-by: Benoit GAUTHIER benoit.gauthier-x...@stericsson.com --- drivers/power/ab8500_fg.c |8 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c index 7de5333..4968061 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_X101129 +#define QLSB_NANO_AMP_HOURS_X101071 #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); -- 1.7.10.4 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
