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Commit c55724f0 authored by Ashay Jaiswal's avatar Ashay Jaiswal
Browse files

hwmon: qpnp-adc: add PM8916 1.0/1.1/2.0 temperature compensation 



Add temperature compensation coefficients for PM8916 VADC to improve
accuracy.

Change-Id: I578185c5c1d852b3f8bb02bb68ce460828369a5b
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
parent 7a64b32c

drivers/hwmon/qpnp-adc-common.c

+21 −0
Original line number Diff line number Diff line
@@ -1267,6 +1267,27 @@ int qpnp_adc_get_revid_version(struct device *dev) 
		(revid_data->pmic_type == PM8110_V2P0_TYPE) &&

		(revid_data->pmic_subtype == PM8110_V2P0_SUBTYPE))

			return QPNP_REV_ID_8110_2_0;

	else if ((revid_data->rev1 == PM8916_V1P0_REV1) &&

		(revid_data->rev2 == PM8916_V1P0_REV2) &&

		(revid_data->rev3 == PM8916_V1P0_REV3) &&

		(revid_data->rev4 == PM8916_V1P0_REV4) &&

		(revid_data->pmic_type == PM8916_V1P0_TYPE) &&

		(revid_data->pmic_subtype == PM8916_V1P0_SUBTYPE))

			return QPNP_REV_ID_8916_1_0;

	else if ((revid_data->rev1 == PM8916_V1P1_REV1) &&

		(revid_data->rev2 == PM8916_V1P1_REV2) &&

		(revid_data->rev3 == PM8916_V1P1_REV3) &&

		(revid_data->rev4 == PM8916_V1P1_REV4) &&

		(revid_data->pmic_type == PM8916_V1P1_TYPE) &&

		(revid_data->pmic_subtype == PM8916_V1P1_SUBTYPE))

			return QPNP_REV_ID_8916_1_1;

	else if ((revid_data->rev1 == PM8916_V2P0_REV1) &&

		(revid_data->rev2 == PM8916_V2P0_REV2) &&

		(revid_data->rev3 == PM8916_V2P0_REV3) &&

		(revid_data->rev4 == PM8916_V2P0_REV4) &&

		(revid_data->pmic_type == PM8916_V2P0_TYPE) &&

		(revid_data->pmic_subtype == PM8916_V2P0_SUBTYPE))

			return QPNP_REV_ID_8916_2_0;

	else

		return -EINVAL;

}

drivers/hwmon/qpnp-adc-voltage.c

+40 −0
Original line number Diff line number Diff line
@@ -527,6 +527,9 @@ static int32_t qpnp_vadc_version_check(struct qpnp_vadc_chip *dev) 
#define QPNP_VBAT_COEFF_23	3500

#define QPNP_VBAT_COEFF_24	4360

#define QPNP_VBAT_COEFF_25	8060

#define QPNP_VBAT_COEFF_26	7895

#define QPNP_VBAT_COEFF_27	5658

#define QPNP_VBAT_COEFF_28	5760



static int32_t qpnp_ocv_comp(int64_t *result,

			struct qpnp_vadc_chip *vadc, int64_t die_temp)
@@ -622,6 +625,28 @@ static int32_t qpnp_ocv_comp(int64_t *result, 
			break;

		}

		break;

	case QPNP_REV_ID_8916_1_0:

	case QPNP_REV_ID_8916_1_1:

	case QPNP_REV_ID_8916_2_0:

		switch (vadc->id) {

		case COMP_ID_SMIC:

			if (die_temp < 25000)

				temp_var = QPNP_VBAT_COEFF_26;

			else

				temp_var = QPNP_VBAT_COEFF_27;

			temp_var = (die_temp - 25000) * temp_var;

			break;

		default:

		case COMP_ID_GF:

			*result -= QPNP_OCV_OFFSET_GF;

			if (die_temp < 25000)

				temp_var = QPNP_VBAT_COEFF_26;

			else

				temp_var = QPNP_VBAT_COEFF_27;

			temp_var = (die_temp - 25000) * temp_var;

			break;

		}

		break;

	default:

		temp_var = 0;

		break;
@@ -729,6 +754,21 @@ static int32_t qpnp_vbat_sns_comp(int64_t *result, 
			break;

		}

		break;

	case QPNP_REV_ID_8916_1_0:

	case QPNP_REV_ID_8916_1_1:

	case QPNP_REV_ID_8916_2_0:

		switch (vadc->id) {

		case COMP_ID_SMIC:

			temp_var = ((die_temp - 25000) *

			(QPNP_VBAT_COEFF_28));

			break;

		default:

		case COMP_ID_GF:

			temp_var = ((die_temp - 25000) *

			(QPNP_VBAT_COEFF_28));

			break;

		}

		break;

	default:

		temp_var = 0;

		break;

include/linux/qpnp-revid.h

+22 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.

/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -97,6 +97,27 @@ 
#define PM8110_V2P0_TYPE	0x51

#define PM8110_V2P0_SUBTYPE	0x05



#define PM8916_V1P0_REV1	0x00

#define PM8916_V1P0_REV2	0x00

#define PM8916_V1P0_REV3	0x00

#define PM8916_V1P0_REV4	0x01

#define PM8916_V1P0_TYPE	0x51

#define PM8916_V1P0_SUBTYPE	0x0B



#define PM8916_V1P1_REV1	0x00

#define PM8916_V1P1_REV2	0x00

#define PM8916_V1P1_REV3	0x01

#define PM8916_V1P1_REV4	0x01

#define PM8916_V1P1_TYPE	0x51

#define PM8916_V1P1_SUBTYPE	0x0B



#define PM8916_V2P0_REV1	0x00

#define PM8916_V2P0_REV2	0x00

#define PM8916_V2P0_REV3	0x00

#define PM8916_V2P0_REV4	0x02

#define PM8916_V2P0_TYPE	0x51

#define PM8916_V2P0_SUBTYPE	0x0B



struct pmic_revid_data {

	u8	rev1;

	u8	rev2;

include/linux/qpnp/qpnp-adc.h

+3 −1
Original line number Diff line number Diff line
@@ -1035,7 +1035,9 @@ struct qpnp_adc_amux_properties { 
#define QPNP_REV_ID_8026_2_2	7

#define QPNP_REV_ID_8941_3_0	8

#define QPNP_REV_ID_8941_2_0	9



#define QPNP_REV_ID_8916_1_0	10

#define QPNP_REV_ID_8916_1_1	11

#define QPNP_REV_ID_8916_2_0	12



/* Public API */

#if defined(CONFIG_SENSORS_QPNP_ADC_VOLTAGE)				\