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Commit 4c3c5b31 authored by Dipen Parmar's avatar Dipen Parmar
Browse files

hwmon: qpnp-adc: Add smb batt_therm reverse scaling 



Add reverse scaling function for smb batt_therm.

Change-Id: Ic81078b9738ee5ee60f505316dd9dbebea8c58fc
Signed-off-by: default avatarDipen Parmar <dipenp@codeaurora.org>
parent a824d306

drivers/hwmon/qpnp-adc-common.c

+53 −0
Original line number Diff line number Diff line
@@ -1122,6 +1122,59 @@ int32_t qpnp_adc_btm_scaler(struct qpnp_vadc_chip *chip, 
}

EXPORT_SYMBOL(qpnp_adc_btm_scaler);



int32_t qpnp_adc_smb_btm_rscaler(struct qpnp_vadc_chip *chip,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

{

	struct qpnp_vadc_linear_graph btm_param;

	int64_t low_output = 0, high_output = 0;

	int rc = 0;



	qpnp_get_vadc_gain_and_offset(chip, &btm_param, CALIB_RATIOMETRIC);



	pr_debug("warm_temp:%d and cool_temp:%d\n", param->high_temp,

				param->low_temp);

	rc = qpnp_adc_map_voltage_temp(

		adcmap_smb_batt_therm,

		ARRAY_SIZE(adcmap_smb_batt_therm),

		(param->low_temp),

		&low_output);

	if (rc) {

		pr_debug("low_temp mapping failed with %d\n", rc);

		return rc;

	}



	pr_debug("low_output:%lld\n", low_output);

	low_output *= btm_param.dy;

	do_div(low_output, btm_param.adc_vref);

	low_output += btm_param.adc_gnd;



	rc = qpnp_adc_map_voltage_temp(

		adcmap_smb_batt_therm,

		ARRAY_SIZE(adcmap_smb_batt_therm),

		(param->high_temp),

		&high_output);

	if (rc) {

		pr_debug("high temp mapping failed with %d\n", rc);

		return rc;

	}



	pr_debug("high_output:%lld\n", high_output);

	high_output *= btm_param.dy;

	do_div(high_output, btm_param.adc_vref);

	high_output += btm_param.adc_gnd;



	/* btm low temperature correspondes to high voltage threshold */

	*low_threshold = high_output;

	/* btm high temperature correspondes to low voltage threshold */

	*high_threshold = low_output;



	pr_debug("high_volt:%d, low_volt:%d\n", *high_threshold,

				*low_threshold);

	return 0;

}

EXPORT_SYMBOL(qpnp_adc_smb_btm_rscaler);



int32_t qpnp_vadc_check_result(int32_t *data)

{

	if (*data < QPNP_VADC_MIN_ADC_CODE)

drivers/thermal/qpnp-adc-tm.c

+1 −0
Original line number Diff line number Diff line
@@ -286,6 +286,7 @@ static struct qpnp_adc_tm_reverse_scale_fn adc_tm_rscale_fn[] = { 
	[SCALE_RBATT_THERM] = {qpnp_adc_btm_scaler},

	[SCALE_R_USB_ID] = {qpnp_adc_usb_scaler},

	[SCALE_RPMIC_THERM] = {qpnp_adc_scale_millidegc_pmic_voltage_thr},

	[SCALE_R_SMB_BATT_THERM] = {qpnp_adc_smb_btm_rscaler},

	[SCALE_R_ABSOLUTE] = {qpnp_adc_absolute_rthr},

};

include/linux/qpnp/qpnp-adc.h

+20 −0
Original line number Diff line number Diff line
@@ -1401,6 +1401,22 @@ int32_t qpnp_adc_vbatt_rscaler(struct qpnp_vadc_chip *dev, 
int32_t qpnp_adc_absolute_rthr(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold);

/**

 * qpnp_adc_smb_btm_rscaler() - Performs reverse calibration on the low/high

 *		temperature threshold values passed by the client.

 *		The function maps the temperature to voltage and applies

 *		ratiometric calibration on the voltage values.

 * @dev:	Structure device for qpnp vadc

 * @param:	The input parameters that contain the low/high temperature

 *		values.

 * @low_threshold: The low threshold value that needs to be updated with

 *		the above calibrated voltage value.

 * @high_threshold: The low threshold value that needs to be updated with

 *		the above calibrated voltage value.

 */

int32_t qpnp_adc_smb_btm_rscaler(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold);

/**

 * qpnp_vadc_iadc_sync_request() - Performs Voltage ADC read and

 *		locks the peripheral. When performing simultaneous
@@ -1547,6 +1563,10 @@ static inline int32_t qpnp_adc_tm_scale_voltage_therm_pu2( 
				struct qpnp_vadc_chip *dev,

				uint32_t reg, int64_t *result)

{ return -ENXIO; }

static inline int32_t qpnp_adc_smb_btm_rscaler(struct qpnp_vadc_chip *dev,

		struct qpnp_adc_tm_btm_param *param,

		uint32_t *low_threshold, uint32_t *high_threshold)

{ return -ENXIO; }

static inline int32_t qpnp_vadc_iadc_sync_request(struct qpnp_vadc_chip *dev,

				enum qpnp_vadc_channels channel)

{ return -ENXIO; }