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Commit 12214ead authored by Dipen Parmar's avatar Dipen Parmar Committed by Gerrit - the friendly Code Review server
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hwmon: qpnp-adc-voltage: Add temperature compensation for PM8909 



Add VBAT and OCV temperature compensation for PM8909
v1.0 SMIC parts.

The temperature compensation is required on top of
gain/offset calibration to compensate for variations
due to chip revision, manufacturer and temperature.

Change-Id: Ic0f110ed53dba314196af31c16c1fd58d20f7f1d
Signed-off-by: default avatarDipen Parmar <dipenp@codeaurora.org>
parent 76eb1e04

drivers/hwmon/qpnp-adc-common.c

+14 −0
Original line number Diff line number Diff line
@@ -1541,6 +1541,20 @@ int qpnp_adc_get_revid_version(struct device *dev) 
		(revid_data->pmic_type == PM8916_V2P0_TYPE) &&

		(revid_data->pmic_subtype == PM8916_V2P0_SUBTYPE))

			return QPNP_REV_ID_8916_2_0;

	else if ((revid_data->rev1 == PM8909_V1P0_REV1) &&

		(revid_data->rev2 == PM8909_V1P0_REV2) &&

		(revid_data->rev3 == PM8909_V1P0_REV3) &&

		(revid_data->rev4 == PM8909_V1P0_REV4) &&

		(revid_data->pmic_type == PM8909_V1P0_TYPE) &&

		(revid_data->pmic_subtype == PM8909_V1P0_SUBTYPE))

			return QPNP_REV_ID_8909_1_0;

	else if ((revid_data->rev1 == PM8909_V1P1_REV1) &&

		(revid_data->rev2 == PM8909_V1P1_REV2) &&

		(revid_data->rev3 == PM8909_V1P1_REV3) &&

		(revid_data->rev4 == PM8909_V1P1_REV4) &&

		(revid_data->pmic_type == PM8909_V1P1_TYPE) &&

		(revid_data->pmic_subtype == PM8909_V1P1_SUBTYPE))

			return QPNP_REV_ID_8909_1_1;

	else

		return -EINVAL;

}

drivers/hwmon/qpnp-adc-voltage.c

+21 −0
Original line number Diff line number Diff line
@@ -696,6 +696,8 @@ static int32_t qpnp_vadc_version_check(struct qpnp_vadc_chip *dev) 
#define QPNP_VBAT_COEFF_46	2120

#define QPNP_VBAT_COEFF_47	3560

#define QPNP_VBAT_COEFF_48	2190

#define QPNP_VBAT_COEFF_49	4180

#define QPNP_VBAT_COEFF_50	27800000



static int32_t qpnp_ocv_comp(int64_t *result,

			struct qpnp_vadc_chip *vadc, int64_t die_temp)
@@ -861,6 +863,13 @@ static int32_t qpnp_ocv_comp(int64_t *result, 
			break;

		}

		break;

	case QPNP_REV_ID_8909_1_0:

		switch (vadc->id) {

		case COMP_ID_SMIC:

			temp_var = (-QPNP_VBAT_COEFF_50);

			break;

		}

		break;

	default:

		temp_var = 0;

		break;
@@ -1032,6 +1041,18 @@ static int32_t qpnp_vbat_sns_comp(int64_t *result, 
			break;

		}

		break;

	case QPNP_REV_ID_8909_1_0:

		switch (vadc->id) {

		case COMP_ID_SMIC:

			if (die_temp < 30000)

				temp_var = (-QPNP_VBAT_COEFF_50);

			else if (die_temp > 30000)

				temp_var = (((die_temp - 30000) *

					(-QPNP_VBAT_COEFF_49)) +

					(-QPNP_VBAT_COEFF_50));

			break;

		}

		break;

	default:

		temp_var = 0;

		break;

include/linux/qpnp/qpnp-adc.h

+2 −0
Original line number Diff line number Diff line
@@ -1088,6 +1088,8 @@ struct qpnp_adc_amux_properties { 
#define QPNP_REV_ID_8916_1_0	10

#define QPNP_REV_ID_8916_1_1	11

#define QPNP_REV_ID_8916_2_0	12

#define QPNP_REV_ID_8909_1_0	13

#define QPNP_REV_ID_8909_1_1	14



/* Public API */

#if defined(CONFIG_SENSORS_QPNP_ADC_VOLTAGE)				\