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| author | Jishnu Prakash <quic_jprakash@quicinc.com> | 2022-04-03 18:47:47 +0530 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2022-05-19 12:11:51 +0200 |
| commit | 238e34ad7d5ce36939ac1442c98c7cbb7771f4de (patch) | |
| tree | 6fbf13e2098d6e5b4d053cbd4f01b8c2a0fc8749 /drivers/iio | |
| parent | e46e003a4897385886f932013673ecfd317c8156 (diff) | |
| download | lwn-238e34ad7d5ce36939ac1442c98c7cbb7771f4de.tar.gz lwn-238e34ad7d5ce36939ac1442c98c7cbb7771f4de.zip | |
iio: adc: qcom-vadc-common: add reverse scaling for PMIC5 Gen2 ADC_TM
Add reverse scaling function for PMIC5 Gen2 ADC_TM, to convert
temperature to raw ADC code, for setting thresholds for
thermistor channels.
Signed-off-by: Jishnu Prakash <quic_jprakash@quicinc.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/1648991869-20899-3-git-send-email-quic_jprakash@quicinc.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/qcom-vadc-common.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c index 6c6aec848f98..d5209f32adb3 100644 --- a/drivers/iio/adc/qcom-vadc-common.c +++ b/drivers/iio/adc/qcom-vadc-common.c @@ -677,6 +677,17 @@ u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio, } EXPORT_SYMBOL(qcom_adc_tm5_temp_volt_scale); +u16 qcom_adc_tm5_gen2_temp_res_scale(int temp) +{ + int64_t resistance; + + resistance = qcom_vadc_map_temp_voltage(adcmap7_100k, + ARRAY_SIZE(adcmap7_100k), temp); + + return div64_s64(resistance * RATIO_MAX_ADC7, resistance + R_PU_100K); +} +EXPORT_SYMBOL(qcom_adc_tm5_gen2_temp_res_scale); + int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype, unsigned int prescale_ratio, const struct adc5_data *data, |