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Commit cec23330 authored by Rama Krishna Phani A's avatar Rama Krishna Phani A Committed by Gerrit - the friendly Code Review server
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iio: rradc: Update RRADC USBIN scaling 



Update scaling factor for RRADC USBIN current
based on USBIN voltage.

Change-Id: I87b2ac56166f2e0812ec56d88c68298094eb86ac
Signed-off-by: default avatarRama Krishna Phani A <rphani@codeaurora.org>
parent 36c8f370

drivers/iio/adc/qcom-rradc.c

+70 −8
Original line number Diff line number Diff line
@@ -180,6 +180,9 @@ 
#define FG_ADC_RR_VOLT_INPUT_FACTOR		8

#define FG_ADC_RR_CURR_INPUT_FACTOR		2000

#define FG_ADC_RR_CURR_USBIN_INPUT_FACTOR_MIL	1886

#define FG_ADC_RR_CURR_USBIN_660_FACTOR_MIL	9

#define FG_ADC_RR_CURR_USBIN_660_UV_VAL	579500



#define FG_ADC_SCALE_MILLI_FACTOR		1000

#define FG_ADC_KELVINMIL_CELSIUSMIL		273150
@@ -192,6 +195,9 @@ 
#define FG_RR_CONV_CONTINUOUS_TIME_MIN_US	50000

#define FG_RR_CONV_CONTINUOUS_TIME_MAX_US	51000

#define FG_RR_CONV_MAX_RETRY_CNT		50

#define FG_RR_TP_REV_VERSION1		21

#define FG_RR_TP_REV_VERSION2		29

#define FG_RR_TP_REV_VERSION3		32



/*

 * The channel number is not a physical index in hardware,
@@ -228,6 +234,7 @@ struct rradc_chip { 
	struct rradc_chan_prop		*chan_props;

	struct device_node		*revid_dev_node;

	struct pmic_revid_data		*pmic_fab_id;

	int volt;

};



struct rradc_channels {
@@ -353,7 +360,7 @@ static int rradc_post_process_volt(struct rradc_chip *chip, 
	return 0;

}



static int rradc_post_process_curr(struct rradc_chip *chip,

static int rradc_post_process_usbin_curr(struct rradc_chip *chip,

			struct rradc_chan_prop *prop, u16 adc_code,

			int *result_ua)

{
@@ -361,11 +368,33 @@ static int rradc_post_process_curr(struct rradc_chip *chip, 


	if (!prop)

		return -EINVAL;



	if (prop->channel == RR_ADC_USBIN_I)

	if (chip->revid_dev_node) {

		switch (chip->pmic_fab_id->pmic_subtype) {

		case PM660_SUBTYPE:

			if (((chip->pmic_fab_id->tp_rev

				>= FG_RR_TP_REV_VERSION1)

			&& (chip->pmic_fab_id->tp_rev

				<= FG_RR_TP_REV_VERSION2))

			|| (chip->pmic_fab_id->tp_rev

				>= FG_RR_TP_REV_VERSION3)) {

				chip->volt = div64_s64(chip->volt, 1000);

				chip->volt = chip->volt *

					FG_ADC_RR_CURR_USBIN_660_FACTOR_MIL;

				chip->volt = FG_ADC_RR_CURR_USBIN_660_UV_VAL -

					(chip->volt);

				chip->volt = div64_s64(1000000000, chip->volt);

				scale = chip->volt;

			} else

				scale = FG_ADC_RR_CURR_USBIN_INPUT_FACTOR_MIL;

	else

		scale = FG_ADC_RR_CURR_INPUT_FACTOR;

			break;

		case PMI8998_SUBTYPE:

			scale = FG_ADC_RR_CURR_USBIN_INPUT_FACTOR_MIL;

			break;

		default:

			pr_err("No PMIC subtype found\n");

			return -EINVAL;

		}

	}



	/* scale * V/A; 2.5V ADC full scale */

	ua = ((int64_t)adc_code * scale);
@@ -376,6 +405,24 @@ static int rradc_post_process_curr(struct rradc_chip *chip, 
	return 0;

}



static int rradc_post_process_dcin_curr(struct rradc_chip *chip,

			struct rradc_chan_prop *prop, u16 adc_code,

			int *result_ua)

{

	int64_t ua = 0;



	if (!prop)

		return -EINVAL;



	/* 0.5 V/A; 2.5V ADC full scale */

	ua = ((int64_t)adc_code * FG_ADC_RR_CURR_INPUT_FACTOR);

	ua *= (FG_ADC_RR_FS_VOLTAGE_MV * FG_ADC_SCALE_MILLI_FACTOR);

	ua = div64_s64(ua, (FG_MAX_ADC_READINGS * 1000));

	*result_ua = ua;



	return 0;

}



static int rradc_post_process_die_temp(struct rradc_chip *chip,

			struct rradc_chan_prop *prop, u16 adc_code,

			int *result_millidegc)
@@ -591,13 +638,13 @@ static const struct rradc_channels rradc_chans[] = { 
			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED),

			FG_ADC_RR_SKIN_TEMP_LSB, FG_ADC_RR_SKIN_TEMP_MSB,

			FG_ADC_RR_AUX_THERM_STS)

	RR_ADC_CHAN_CURRENT("usbin_i", &rradc_post_process_curr,

	RR_ADC_CHAN_CURRENT("usbin_i", &rradc_post_process_usbin_curr,

			FG_ADC_RR_USB_IN_I_LSB, FG_ADC_RR_USB_IN_I_MSB,

			FG_ADC_RR_USB_IN_I_STS)

	RR_ADC_CHAN_VOLT("usbin_v", &rradc_post_process_volt,

			FG_ADC_RR_USB_IN_V_LSB, FG_ADC_RR_USB_IN_V_MSB,

			FG_ADC_RR_USB_IN_V_STS)

	RR_ADC_CHAN_CURRENT("dcin_i", &rradc_post_process_curr,

	RR_ADC_CHAN_CURRENT("dcin_i", &rradc_post_process_dcin_curr,

			FG_ADC_RR_DC_IN_I_LSB, FG_ADC_RR_DC_IN_I_MSB,

			FG_ADC_RR_DC_IN_I_STS)

	RR_ADC_CHAN_VOLT("dcin_v", &rradc_post_process_volt,
@@ -955,6 +1002,21 @@ static int rradc_read_raw(struct iio_dev *indio_dev, 


	switch (mask) {

	case IIO_CHAN_INFO_PROCESSED:

		if (((chip->pmic_fab_id->tp_rev

				>= FG_RR_TP_REV_VERSION1)

		&& (chip->pmic_fab_id->tp_rev

				<= FG_RR_TP_REV_VERSION2))

		|| (chip->pmic_fab_id->tp_rev

				>= FG_RR_TP_REV_VERSION3)) {

			if (chan->address == RR_ADC_USBIN_I) {

				prop = &chip->chan_props[RR_ADC_USBIN_V];

				rc = rradc_do_conversion(chip, prop, &adc_code);

				if (rc)

					break;

				prop->scale(chip, prop, adc_code, &chip->volt);

			}

		}



		prop = &chip->chan_props[chan->address];

		rc = rradc_do_conversion(chip, prop, &adc_code);

		if (rc)