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| author | Linux Build Service Account <lnxbuild@localhost> | 2016-10-06 01:07:19 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-10-06 01:07:19 -0700 |
| commit | e7f64f186c9b9797997e5fa8d984897efdc359ae (patch) | |
| tree | 61e53fabce88f713201c2774399c3d9f54c62a8d | |
| parent | 07c163a9f0b195585ba8195e878eb662c93b3edd (diff) | |
| parent | 03a962620b069e4571e94a267ea43cb93db27e1b (diff) | |
Merge "hwmon: qpnp-adc-common: Clamp voltage value"
| -rw-r--r-- | drivers/hwmon/qpnp-adc-common.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hwmon/qpnp-adc-common.c b/drivers/hwmon/qpnp-adc-common.c index 787a9e5a15c8..d8ef5f59edcb 100644 --- a/drivers/hwmon/qpnp-adc-common.c +++ b/drivers/hwmon/qpnp-adc-common.c @@ -39,6 +39,8 @@ #define PMI_CHG_SCALE_2 391750000000 #define QPNP_VADC_HC_VREF_CODE 0x4000 #define QPNP_VADC_HC_VDD_REFERENCE_MV 1875 +/* Clamp negative ADC code to 0 */ +#define QPNP_VADC_HC_MAX_CODE 0x7FFF /* Units for temperature below (on x axis) is in 0.1DegC as required by the battery driver. Note the resolution used @@ -752,6 +754,8 @@ int32_t qpnp_adc_scale_pmic_therm(struct qpnp_vadc_chip *vadc, if (adc_properties->adc_hc) { /* (ADC code * vref_vadc (1.875V)) / 0x4000 */ + if (adc_code > QPNP_VADC_HC_MAX_CODE) + adc_code = 0; pmic_voltage = (int64_t) adc_code; pmic_voltage *= (int64_t) (adc_properties->adc_vdd_reference * 1000); @@ -862,6 +866,8 @@ int32_t qpnp_adc_tdkntcg_therm(struct qpnp_vadc_chip *chip, if (adc_properties->adc_hc) { /* (ADC code * vref_vadc (1.875V) * 1000) / (0x4000 * 1000) */ + if (adc_code > QPNP_VADC_HC_MAX_CODE) + adc_code = 0; xo_thm_voltage = (int64_t) adc_code; xo_thm_voltage *= (int64_t) (adc_properties->adc_vdd_reference * 1000); @@ -1059,6 +1065,8 @@ int32_t qpnp_adc_scale_therm_pu2(struct qpnp_vadc_chip *chip, if (adc_properties->adc_hc) { /* (ADC code * vref_vadc (1.875V) * 1000) / (0x4000 * 1000) */ + if (adc_code > QPNP_VADC_HC_MAX_CODE) + adc_code = 0; therm_voltage = (int64_t) adc_code; therm_voltage *= (int64_t) (adc_properties->adc_vdd_reference * 1000); @@ -1094,6 +1102,8 @@ int32_t qpnp_adc_tm_scale_voltage_therm_pu2(struct qpnp_vadc_chip *chip, if (adc_properties->adc_hc) { /* (ADC code * vref_vadc (1.875V)) / 0x4000 */ + if (reg > QPNP_VADC_HC_MAX_CODE) + reg = 0; adc_voltage = (int64_t) reg; adc_voltage *= QPNP_VADC_HC_VDD_REFERENCE_MV; adc_voltage = div64_s64(adc_voltage, @@ -1228,6 +1238,8 @@ int32_t qpnp_adc_scale_default(struct qpnp_vadc_chip *vadc, if (adc_properties->adc_hc) { /* (ADC code * vref_vadc (1.875V)) / 0x4000 */ + if (adc_code > QPNP_VADC_HC_MAX_CODE) + adc_code = 0; scale_voltage = (int64_t) adc_code; scale_voltage *= (adc_properties->adc_vdd_reference * 1000); scale_voltage = div64_s64(scale_voltage, |