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Commit 74ab4c1d authored by Siddartha Mohanadoss's avatar Siddartha Mohanadoss
Browse files

hwmon: qpnp-adc: Add scaling support for PMI CHG channel 



The voltage measured by the HKADC is related to the junction
temperature and scaled by the following equation :-
tj = -138.89degC * (v_adc * 2) + 391.75degC

Change-Id: Ibd6185c3926f9f5e482b3990adff3eee61e7caa5
Signed-off-by: default avatarSiddartha Mohanadoss <smohanad@codeaurora.org>
parent 8f275c1c

drivers/hwmon/qpnp-adc-common.c

+26 −0
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ 
#define QPNP_VADC_LDO_VOLTAGE_MAX	1800000

#define QPNP_VADC_OK_VOLTAGE_MIN	1000000

#define QPNP_VADC_OK_VOLTAGE_MAX	1000000

#define PMI_CHG_SCALE_1		-138890

#define PMI_CHG_SCALE_2		391750000000



/* Units for temperature below (on x axis) is in 0.1DegC as

   required by the battery driver. Note the resolution used
@@ -1529,6 +1531,30 @@ int32_t qpnp_adc_smb_btm_rscaler(struct qpnp_vadc_chip *chip, 
}

EXPORT_SYMBOL(qpnp_adc_smb_btm_rscaler);



int32_t qpnp_adc_scale_pmi_chg_temp(struct qpnp_vadc_chip *vadc,

		int32_t adc_code,

		const struct qpnp_adc_properties *adc_properties,

		const struct qpnp_vadc_chan_properties *chan_properties,

		struct qpnp_vadc_result *adc_chan_result)

{

	int rc = 0;



	rc = qpnp_adc_scale_default(vadc, adc_code, adc_properties,

			chan_properties, adc_chan_result);

	if (rc < 0)

		return rc;



	pr_debug("raw_code:%x, v_adc:%lld\n", adc_code,

						adc_chan_result->physical);

	adc_chan_result->physical = ((PMI_CHG_SCALE_1) *

					(adc_chan_result->physical * 2));

	adc_chan_result->physical += PMI_CHG_SCALE_2;

	do_div(adc_chan_result->physical, 1000000);



	return 0;

}

EXPORT_SYMBOL(qpnp_adc_scale_pmi_chg_temp);



int32_t qpnp_adc_enable_voltage(struct qpnp_adc_drv *adc)

{

	int rc = 0;

drivers/hwmon/qpnp-adc-voltage.c

+1 −0
Original line number Diff line number Diff line
@@ -172,6 +172,7 @@ static struct qpnp_vadc_scale_fn vadc_scale_fn[] = { 
	[SCALE_QRD_SKUH_BATT_THERM] = {qpnp_adc_scale_qrd_skuh_batt_therm},

	[SCALE_NCP_03WF683_THERM] = {qpnp_adc_scale_therm_ncp03},

	[SCALE_QRD_SKUT1_BATT_THERM] = {qpnp_adc_scale_qrd_skut1_batt_therm},

	[SCALE_PMI_CHG_TEMP] = {qpnp_adc_scale_pmi_chg_temp},

};



static struct qpnp_vadc_rscale_fn adc_vadc_rscale_fn[] = {

include/linux/qpnp/qpnp-adc.h

+41 −14
Original line number Diff line number Diff line
@@ -255,6 +255,7 @@ enum qpnp_adc_channel_scaling_param { 
 *          btm parameters for SKUH

 * %SCALE_QRD_SKUT1_BATT_THERM: Conversion to temperature(decidegC) based on

 *          btm parameters for SKUT1

 * %SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp

 * %SCALE_NONE: Do not use this scaling type.

 */

enum qpnp_adc_scale_fn_type {
@@ -271,6 +272,7 @@ enum qpnp_adc_scale_fn_type { 
	SCALE_QRD_SKUH_BATT_THERM,

	SCALE_NCP_03WF683_THERM,

	SCALE_QRD_SKUT1_BATT_THERM,

	SCALE_PMI_CHG_TEMP,

	SCALE_NONE,

};
@@ -1139,7 +1141,7 @@ int32_t qpnp_adc_get_devicetree_data(struct spmi_device *spmi, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the qpnp adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	Individual channel properties to compensate the i/p scaling,
@@ -1157,7 +1159,7 @@ int32_t qpnp_adc_scale_default(struct qpnp_vadc_chip *dev, 
 *		gain and offset. Performs the AMUX out as 2mV/K and returns

 *		the temperature in milli degC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the qpnp adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	Individual channel properties to compensate the i/p scaling,
@@ -1169,12 +1171,31 @@ int32_t qpnp_adc_scale_pmic_therm(struct qpnp_vadc_chip *dev, 
			const struct qpnp_adc_properties *adc_prop,

			const struct qpnp_vadc_chan_properties *chan_prop,

			struct qpnp_vadc_result *chan_rslt);

/**

 * qpnp_adc_scale_pmi_chg_temp() - Scales the pre-calibrated digital output

 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. The voltage measured by HKADC is related to

 *		the junction temperature according to

 *		Tj = -137.67 degC * (V_adc * 2) + 382.04 degC

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the qpnp adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	Individual channel properties to compensate the i/p scaling,

 *		slope and offset.

 * @chan_rslt:	Physical result to be stored.

 */

int32_t qpnp_adc_scale_pmi_chg_temp(struct qpnp_vadc_chip *dev,

			int32_t adc_code,

			const struct qpnp_adc_properties *adc_prop,

			const struct qpnp_vadc_chan_properties *chan_prop,

			struct qpnp_vadc_result *chan_rslt);

/**

 * qpnp_adc_scale_batt_therm() - Scales the pre-calibrated digital output

 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1191,7 +1212,7 @@ int32_t qpnp_adc_scale_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1208,7 +1229,7 @@ int32_t qpnp_adc_scale_qrd_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1225,7 +1246,7 @@ int32_t qpnp_adc_scale_qrd_skuaa_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1242,7 +1263,7 @@ int32_t qpnp_adc_scale_qrd_skug_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1259,7 +1280,7 @@ int32_t qpnp_adc_scale_qrd_skuh_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1276,7 +1297,7 @@ int32_t qpnp_adc_scale_qrd_skut1_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset. Returns the temperature in decidegC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1293,7 +1314,7 @@ int32_t qpnp_adc_scale_smb_batt_therm(struct qpnp_vadc_chip *dev, 
 *		of an ADC to the ADC reference and compensates for the

 *		gain and offset.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1310,7 +1331,7 @@ int32_t qpnp_adc_scale_batt_id(struct qpnp_vadc_chip *dev, int32_t adc_code, 
 *		gain and offset. Returns the temperature of the xo therm in mili

		degC.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1328,7 +1349,7 @@ int32_t qpnp_adc_tdkntcg_therm(struct qpnp_vadc_chip *dev, int32_t adc_code, 
 *		It uses a mapping table computed for a 150K pull-up.

 *		Pull-up1 is an internal pull-up on the AMUX of 150K.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1346,7 +1367,7 @@ int32_t qpnp_adc_scale_therm_pu1(struct qpnp_vadc_chip *dev, int32_t adc_code, 
 *		It uses a mapping table computed for a 100K pull-up.

 *		Pull-up2 is an internal pull-up on the AMUX of 100K.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1363,7 +1384,7 @@ int32_t qpnp_adc_scale_therm_pu2(struct qpnp_vadc_chip *dev, int32_t adc_code, 
 *		gain and offset. Returns the temperature of the therm in degC.

 *		It uses a mapping table computed for a NCP03WF683.

 * @dev:	Structure device for qpnp vadc

 * @adc_code:	pre-calibrated digital ouput of the ADC.

 * @adc_code:	pre-calibrated digital output of the ADC.

 * @adc_prop:	adc properties of the pm8xxx adc such as bit resolution,

 *		reference voltage.

 * @chan_prop:	individual channel properties to compensate the i/p scaling,
@@ -1688,6 +1709,12 @@ static inline int32_t qpnp_adc_scale_pmic_therm(struct qpnp_vadc_chip *vadc, 
			const struct qpnp_vadc_chan_properties *chan_prop,

			struct qpnp_vadc_result *chan_rslt)

{ return -ENXIO; }

static inline int32_t qpnp_adc_scale_pmi_chg_temp(struct qpnp_vadc_chip *vadc,

			int32_t adc_code,

			const struct qpnp_adc_properties *adc_prop,

			const struct qpnp_vadc_chan_properties *chan_prop,

			struct qpnp_vadc_result *chan_rslt)

{ return -ENXIO; }

static inline int32_t qpnp_adc_scale_batt_therm(struct qpnp_vadc_chip *vadc,

			int32_t adc_code,

			const struct qpnp_adc_properties *adc_prop,