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iio: qcom-spmi-adc5: add CHG_TEMP channel for PMIC7

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Add support to read CHG_TEMP channel on PM8350B to get charger
temperature.

Change-Id: I33c69e56d47b0ab37772df8d55eae2ab0c5bad86
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2020-08-06 21:41:03 -07:00
commit ace4dec329
3 changed files with 30 additions and 0 deletions
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2
drivers/iio/adc/qcom-spmi-adc5.c
View file

@ -675,6 +675,8 @@ static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = {
SCALE_HW_CALIB_DEFAULT)
[ADC7_AMUX_THM3] = ADC5_CHAN_TEMP("smb_temp", 0,
SCALE_HW_CALIB_PM7_SMB_TEMP)
[ADC7_CHG_TEMP] = ADC5_CHAN_TEMP("chg_temp", 0,
SCALE_HW_CALIB_PM7_CHG_TEMP)
[ADC7_DIE_TEMP] = ADC5_CHAN_TEMP("die_temp", 0,
SCALE_HW_CALIB_PMIC_THERM_PM7)
[ADC7_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_pu2", 0,

25
drivers/iio/adc/qcom-vadc-common.c
View file

@ -548,6 +548,10 @@ static int qcom_vadc_scale_hw_chg5_temp(
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,
u16 adc_code, int *result_mdec);
static int qcom_vadc_scale_hw_pm7_chg_temp(
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,
u16 adc_code, int *result_mdec);
static int qcom_vadc_scale_hw_calib_die_temp(
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,
@ -576,6 +580,7 @@ static struct qcom_adc5_scale_type scale_adc5_fn[] = {
[SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},
[SCALE_HW_CALIB_PM5_SMB1398_TEMP] = {qcom_vadc_scale_hw_smb1398_temp},
[SCALE_HW_CALIB_PM7_SMB_TEMP] = {qcom_vadc_scale_hw_pm7_smb_temp},
[SCALE_HW_CALIB_PM7_CHG_TEMP] = {qcom_vadc_scale_hw_pm7_chg_temp},
};
static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,
@ -897,6 +902,26 @@ static int qcom_vadc7_scale_hw_calib_die_temp(
return 0;
}
static int qcom_vadc_scale_hw_pm7_chg_temp(
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,
u16 adc_code, int *result_mdec)
{
s64 temp;
int result_uv;
result_uv = qcom_vadc_scale_code_voltage_factor(adc_code,
prescale, data, 1);
/* T(C) = Vadc/0.0033 – 277.12 */
temp = div_s64((30303LL * result_uv) - (27712 * 1000000LL), 100000);
pr_debug("adc_code: %u result_uv: %d temp: %lld\n", adc_code, result_uv,
temp);
*result_mdec = temp > 0 ? temp : 0;
return 0;
}
static int qcom_vadc_scale_hw_pm7_smb_temp(
const struct vadc_prescale_ratio *prescale,
const struct adc5_data *data,

3
drivers/iio/adc/qcom-vadc-common.h
View file

@ -144,6 +144,8 @@ struct vadc_prescale_ratio {
* The hardware applies offset/slope to adc code. This is for PMIC7.
* SCALE_HW_CALIB_PM7_SMB_TEMP: Returns result in millidegrees for PMIC7
* SMB139x temperature.
* SCALE_HW_CALIB_PM7_CHG_TEMP: Returns result in millidegrees for PMIC7
* charger temperature.
*/
enum vadc_scale_fn_type {
SCALE_DEFAULT = 0,
@ -165,6 +167,7 @@ enum vadc_scale_fn_type {
SCALE_HW_CALIB_THERM_100K_PU_PM7,
SCALE_HW_CALIB_PMIC_THERM_PM7,
SCALE_HW_CALIB_PM7_SMB_TEMP,
SCALE_HW_CALIB_PM7_CHG_TEMP,
SCALE_HW_CALIB_INVALID,
};