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Commit dd95ccfb authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "iio: adc: spmi-adc5: Add support for PM2250 S3 die temp channel"

parents 46f86ded 9c1f029e

drivers/iio/adc/qcom-vadc-common.c

+34 −0
Original line number Diff line number Diff line
@@ -552,6 +552,10 @@ static int qcom_vadc_scale_hw_smb1398_temp( 
				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec);

static int qcom_vadc_scale_hw_pm2250_s3_die_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec);

static int qcom_vadc_scale_hw_chg5_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,
@@ -589,6 +593,7 @@ static struct qcom_adc5_scale_type scale_adc5_fn[] = { 
	[SCALE_HW_CALIB_PM5_CHG_TEMP] = {qcom_vadc_scale_hw_chg5_temp},

	[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_PM2250_S3_DIE_TEMP] = {qcom_vadc_scale_hw_pm2250_s3_die_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},

};
@@ -1032,6 +1037,35 @@ static int qcom_vadc_scale_hw_smb1398_temp( 
	return 0;

}



static int qcom_vadc_scale_hw_pm2250_s3_die_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

				u16 adc_code, int *result_mdec)

{

	s64 voltage = 0, adc_vdd_ref_mv = 1875;



	if (adc_code > VADC5_MAX_CODE)

		adc_code = 0;



	/* (ADC code * vref_vadc (1.875V)) / full_scale_code */

	voltage = (s64) adc_code * adc_vdd_ref_mv * 1000;

	voltage = div64_s64(voltage, data->full_scale_code_volt);

	if (voltage > 0) {

		voltage *= prescale->den;

		voltage = div64_s64(voltage, prescale->num);

	} else {

		voltage = 0;

	}



	voltage = PMIC5_PM2250_S3_DIE_TEMP_CONSTANT - voltage;

	voltage *= 100000;

	voltage = div64_s64(voltage, PMIC5_PM2250_S3_DIE_TEMP_SCALE_FACTOR);



	*result_mdec = voltage;



	return 0;

}



static int qcom_vadc_scale_hw_chg5_temp(

				const struct vadc_prescale_ratio *prescale,

				const struct adc5_data *data,

drivers/iio/adc/qcom-vadc-common.h

+6 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ 
#define PMIC5_SMB1398_TEMP_SCALE_FACTOR	340

#define PMIC5_SMB1398_TEMP_CONSTANT		268235



#define PMIC5_PM2250_S3_DIE_TEMP_SCALE_FACTOR	187263

#define PMIC5_PM2250_S3_DIE_TEMP_CONSTANT		720100



#define PMI_CHG_SCALE_1				-138890

#define PMI_CHG_SCALE_2				391750000000LL
@@ -150,6 +153,8 @@ struct vadc_prescale_ratio { 
 *	charger temperature.

 * SCALE_HW_CALIB_CUR_RAW: Returns result in microamperes for PMIC7 channels

 *	that uses raw ADC code.

 * SCALE_HW_CALIB_PM2250_S3_DIE_TEMP: Returns result in millidegrees for

 *	S3 die temperature channel on PM2250.

 */

enum vadc_scale_fn_type {

	SCALE_DEFAULT = 0,
@@ -173,6 +178,7 @@ enum vadc_scale_fn_type { 
	SCALE_HW_CALIB_PM7_SMB_TEMP,

	SCALE_HW_CALIB_PM7_CHG_TEMP,

	SCALE_HW_CALIB_CUR_RAW,

	SCALE_HW_CALIB_PM2250_S3_DIE_TEMP,

	SCALE_HW_CALIB_INVALID,

};