diff options
Diffstat (limited to 'drivers/iio/adc/qcom-rradc.c')
| -rw-r--r-- | drivers/iio/adc/qcom-rradc.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/iio/adc/qcom-rradc.c b/drivers/iio/adc/qcom-rradc.c index ebb49230d4d7..e08de7a808eb 100644 --- a/drivers/iio/adc/qcom-rradc.c +++ b/drivers/iio/adc/qcom-rradc.c @@ -165,7 +165,8 @@ #define FG_ADC_RR_CHG_THRESHOLD_SCALE 4 #define FG_ADC_RR_VOLT_INPUT_FACTOR 8 -#define FG_ADC_RR_CURR_INPUT_FACTOR 2 +#define FG_ADC_RR_CURR_INPUT_FACTOR 2000 +#define FG_ADC_RR_CURR_USBIN_INPUT_FACTOR_MIL 1886 #define FG_ADC_SCALE_MILLI_FACTOR 1000 #define FG_ADC_KELVINMIL_CELSIUSMIL 273150 @@ -323,12 +324,20 @@ static int rradc_post_process_curr(struct rradc_chip *chip, struct rradc_chan_prop *prop, u16 adc_code, int *result_ua) { - int64_t ua = 0; + int64_t ua = 0, scale = 0; - /* 0.5 V/A; 2.5V ADC full scale */ - ua = ((int64_t)adc_code * FG_ADC_RR_CURR_INPUT_FACTOR); + if (!prop) + return -EINVAL; + + if (prop->channel == RR_ADC_USBIN_I) + scale = FG_ADC_RR_CURR_USBIN_INPUT_FACTOR_MIL; + else + scale = FG_ADC_RR_CURR_INPUT_FACTOR; + + /* scale * V/A; 2.5V ADC full scale */ + ua = ((int64_t)adc_code * scale); ua *= (FG_ADC_RR_FS_VOLTAGE_MV * FG_ADC_SCALE_MILLI_FACTOR); - ua = div64_s64(ua, FG_MAX_ADC_READINGS); + ua = div64_s64(ua, (FG_MAX_ADC_READINGS * 1000)); *result_ua = ua; return 0; |