drivers/power/qcom-charger/qpnp-fg-gen3.c

/* Copyright (c) 2016, 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
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#define pr_fmt(fmt)	"FG: %s: " fmt, __func__

#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/of_batterydata.h>
#include <linux/platform_device.h>
#include <linux/iio/consumer.h>
#include <linux/qpnp/qpnp-revid.h>
#include "fg-core.h"
#include "fg-reg.h"

#define FG_GEN3_DEV_NAME	"qcom,fg-gen3"

#define PERPH_SUBTYPE_REG		0x05
#define FG_BATT_SOC_PMICOBALT		0x10
#define FG_BATT_INFO_PMICOBALT		0x11
#define FG_MEM_INFO_PMICOBALT		0x0D

/* SRAM address and offset in ascending order */
#define CUTOFF_VOLT_WORD		5
#define CUTOFF_VOLT_OFFSET		0
#define SYS_TERM_CURR_WORD		6
#define SYS_TERM_CURR_OFFSET		0
#define VBATT_FULL_WORD			7
#define VBATT_FULL_OFFSET		0
#define KI_COEFF_MED_DISCHG_WORD	9
#define KI_COEFF_MED_DISCHG_OFFSET	3
#define KI_COEFF_HI_DISCHG_WORD		10
#define KI_COEFF_HI_DISCHG_OFFSET	0
#define KI_COEFF_LOW_DISCHG_WORD	10
#define KI_COEFF_LOW_DISCHG_OFFSET	2
#define DELTA_SOC_THR_WORD		12
#define DELTA_SOC_THR_OFFSET		3
#define RECHARGE_SOC_THR_WORD		14
#define RECHARGE_SOC_THR_OFFSET		0
#define CHG_TERM_CURR_WORD		14
#define CHG_TERM_CURR_OFFSET		1
#define EMPTY_VOLT_WORD			15
#define EMPTY_VOLT_OFFSET		0
#define VBATT_LOW_WORD			15
#define VBATT_LOW_OFFSET		1
#define ESR_TIMER_DISCHG_MAX_WORD	17
#define ESR_TIMER_DISCHG_MAX_OFFSET	0
#define ESR_TIMER_DISCHG_INIT_WORD	17
#define ESR_TIMER_DISCHG_INIT_OFFSET	2
#define ESR_TIMER_CHG_MAX_WORD		18
#define ESR_TIMER_CHG_MAX_OFFSET	0
#define ESR_TIMER_CHG_INIT_WORD		18
#define ESR_TIMER_CHG_INIT_OFFSET	2
#define PROFILE_LOAD_WORD		24
#define PROFILE_LOAD_OFFSET		0
#define NOM_CAP_WORD			58
#define NOM_CAP_OFFSET			0
#define ACT_BATT_CAP_BKUP_WORD		74
#define ACT_BATT_CAP_BKUP_OFFSET	0
#define CYCLE_COUNT_WORD		75
#define CYCLE_COUNT_OFFSET		0
#define PROFILE_INTEGRITY_WORD		79
#define PROFILE_INTEGRITY_OFFSET	3
#define BATT_SOC_WORD			91
#define BATT_SOC_OFFSET			0
#define FULL_SOC_WORD			93
#define FULL_SOC_OFFSET			2
#define MONOTONIC_SOC_WORD		94
#define MONOTONIC_SOC_OFFSET		2
#define CC_SOC_WORD			95
#define CC_SOC_OFFSET			0
#define CC_SOC_SW_WORD			96
#define CC_SOC_SW_OFFSET		0
#define VOLTAGE_PRED_WORD		97
#define VOLTAGE_PRED_OFFSET		0
#define OCV_WORD			97
#define OCV_OFFSET			2
#define RSLOW_WORD			101
#define RSLOW_OFFSET			0
#define ACT_BATT_CAP_WORD		117
#define ACT_BATT_CAP_OFFSET		0
#define LAST_BATT_SOC_WORD		119
#define LAST_BATT_SOC_OFFSET		0
#define LAST_MONOTONIC_SOC_WORD		119
#define LAST_MONOTONIC_SOC_OFFSET	2
#define ALG_FLAGS_WORD			120
#define ALG_FLAGS_OFFSET		1

/* v2 SRAM address and offset in ascending order */
#define KI_COEFF_LOW_DISCHG_v2_WORD	9
#define KI_COEFF_LOW_DISCHG_v2_OFFSET	3
#define KI_COEFF_MED_DISCHG_v2_WORD	10
#define KI_COEFF_MED_DISCHG_v2_OFFSET	0
#define KI_COEFF_HI_DISCHG_v2_WORD	10
#define KI_COEFF_HI_DISCHG_v2_OFFSET	1
#define DELTA_SOC_THR_v2_WORD		13
#define DELTA_SOC_THR_v2_OFFSET		0
#define RECHARGE_SOC_THR_v2_WORD	14
#define RECHARGE_SOC_THR_v2_OFFSET	1
#define CHG_TERM_CURR_v2_WORD		15
#define CHG_TERM_CURR_v2_OFFSET		1
#define EMPTY_VOLT_v2_WORD		15
#define EMPTY_VOLT_v2_OFFSET		3
#define VBATT_LOW_v2_WORD		16
#define VBATT_LOW_v2_OFFSET		0
#define FLOAT_VOLT_v2_WORD		16
#define FLOAT_VOLT_v2_OFFSET		2

static int fg_decode_voltage_15b(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val);
static int fg_decode_value_16b(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val);
static int fg_decode_default(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val);
static int fg_decode_cc_soc(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int value);
static void fg_encode_voltage(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val_mv, u8 *buf);
static void fg_encode_current(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val_ma, u8 *buf);
static void fg_encode_default(struct fg_sram_param *sp,
	enum fg_sram_param_id id, int val, u8 *buf);

#define PARAM(_id, _addr_word, _addr_byte, _len, _num, _den, _offset,	\
	      _enc, _dec)						\
	[FG_SRAM_##_id] = {						\
		.addr_word	= _addr_word,				\
		.addr_byte	= _addr_byte,				\
		.len		= _len,					\
		.numrtr		= _num,					\
		.denmtr		= _den,					\
		.offset		= _offset,				\
		.encode		= _enc,					\
		.decode		= _dec,					\
	}								\

static struct fg_sram_param pmicobalt_v1_sram_params[] = {
	PARAM(BATT_SOC, BATT_SOC_WORD, BATT_SOC_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_default),
	PARAM(VOLTAGE_PRED, VOLTAGE_PRED_WORD, VOLTAGE_PRED_OFFSET, 2, 244141,
		1000, 0, NULL, fg_decode_voltage_15b),
	PARAM(OCV, OCV_WORD, OCV_OFFSET, 2, 244141, 1000, 0, NULL,
		fg_decode_voltage_15b),
	PARAM(RSLOW, RSLOW_WORD, RSLOW_OFFSET, 2, 244141, 1000, 0, NULL,
		fg_decode_value_16b),
	PARAM(ALG_FLAGS, ALG_FLAGS_WORD, ALG_FLAGS_OFFSET, 1, 1, 1, 0, NULL,
		fg_decode_default),
	PARAM(CC_SOC, CC_SOC_WORD, CC_SOC_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_cc_soc),
	PARAM(CC_SOC_SW, CC_SOC_SW_WORD, CC_SOC_SW_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_cc_soc),
	PARAM(ACT_BATT_CAP, ACT_BATT_CAP_BKUP_WORD, ACT_BATT_CAP_BKUP_OFFSET, 2,
		1, 1, 0, NULL, fg_decode_default),
	/* Entries below here are configurable during initialization */
	PARAM(CUTOFF_VOLT, CUTOFF_VOLT_WORD, CUTOFF_VOLT_OFFSET, 2, 1000000,
		244141, 0, fg_encode_voltage, NULL),
	PARAM(EMPTY_VOLT, EMPTY_VOLT_WORD, EMPTY_VOLT_OFFSET, 1, 100000, 390625,
		-2500, fg_encode_voltage, NULL),
	PARAM(VBATT_LOW, VBATT_LOW_WORD, VBATT_LOW_OFFSET, 1, 100000, 390625,
		-2500, fg_encode_voltage, NULL),
	PARAM(VBATT_FULL, VBATT_FULL_WORD, VBATT_FULL_OFFSET, 2, 1000000,
		244141, 0, fg_encode_voltage, NULL),
	PARAM(SYS_TERM_CURR, SYS_TERM_CURR_WORD, SYS_TERM_CURR_OFFSET, 3,
		1000000, 122070, 0, fg_encode_current, NULL),
	PARAM(CHG_TERM_CURR, CHG_TERM_CURR_WORD, CHG_TERM_CURR_OFFSET, 1,
		100000, 390625, 0, fg_encode_current, NULL),
	PARAM(DELTA_SOC_THR, DELTA_SOC_THR_WORD, DELTA_SOC_THR_OFFSET, 1, 2048,
		100, 0, fg_encode_default, NULL),
	PARAM(RECHARGE_SOC_THR, RECHARGE_SOC_THR_WORD, RECHARGE_SOC_THR_OFFSET,
		1, 256, 100, 0, fg_encode_default, NULL),
	PARAM(ESR_TIMER_DISCHG_MAX, ESR_TIMER_DISCHG_MAX_WORD,
		ESR_TIMER_DISCHG_MAX_OFFSET, 2, 1, 1, 0, fg_encode_default,
		NULL),
	PARAM(ESR_TIMER_DISCHG_INIT, ESR_TIMER_DISCHG_INIT_WORD,
		ESR_TIMER_DISCHG_INIT_OFFSET, 2, 1, 1, 0, fg_encode_default,
		NULL),
	PARAM(ESR_TIMER_CHG_MAX, ESR_TIMER_CHG_MAX_WORD,
		ESR_TIMER_CHG_MAX_OFFSET, 2, 1, 1, 0, fg_encode_default, NULL),
	PARAM(ESR_TIMER_CHG_INIT, ESR_TIMER_CHG_INIT_WORD,
		ESR_TIMER_CHG_INIT_OFFSET, 2, 1, 1, 0, fg_encode_default, NULL),
	PARAM(KI_COEFF_MED_DISCHG, KI_COEFF_MED_DISCHG_WORD,
		KI_COEFF_MED_DISCHG_OFFSET, 1, 1000, 244141, 0,
		fg_encode_default, NULL),
	PARAM(KI_COEFF_HI_DISCHG, KI_COEFF_HI_DISCHG_WORD,
		KI_COEFF_HI_DISCHG_OFFSET, 1, 1000, 244141, 0,
		fg_encode_default, NULL),
};

static struct fg_sram_param pmicobalt_v2_sram_params[] = {
	PARAM(BATT_SOC, BATT_SOC_WORD, BATT_SOC_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_default),
	PARAM(VOLTAGE_PRED, VOLTAGE_PRED_WORD, VOLTAGE_PRED_OFFSET, 2, 244141,
		1000, 0, NULL, fg_decode_voltage_15b),
	PARAM(OCV, OCV_WORD, OCV_OFFSET, 2, 244141, 1000, 0, NULL,
		fg_decode_voltage_15b),
	PARAM(RSLOW, RSLOW_WORD, RSLOW_OFFSET, 2, 244141, 1000, 0, NULL,
		fg_decode_value_16b),
	PARAM(ALG_FLAGS, ALG_FLAGS_WORD, ALG_FLAGS_OFFSET, 1, 1, 1, 0, NULL,
		fg_decode_default),
	PARAM(CC_SOC, CC_SOC_WORD, CC_SOC_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_cc_soc),
	PARAM(CC_SOC_SW, CC_SOC_SW_WORD, CC_SOC_SW_OFFSET, 4, 1, 1, 0, NULL,
		fg_decode_cc_soc),
	PARAM(ACT_BATT_CAP, ACT_BATT_CAP_BKUP_WORD, ACT_BATT_CAP_BKUP_OFFSET, 2,
		1, 1, 0, NULL, fg_decode_default),
	/* Entries below here are configurable during initialization */
	PARAM(CUTOFF_VOLT, CUTOFF_VOLT_WORD, CUTOFF_VOLT_OFFSET, 2, 1000000,
		244141, 0, fg_encode_voltage, NULL),
	PARAM(EMPTY_VOLT, EMPTY_VOLT_v2_WORD, EMPTY_VOLT_v2_OFFSET, 1, 1000,
		15625, -2000, fg_encode_voltage, NULL),
	PARAM(VBATT_LOW, VBATT_LOW_v2_WORD, VBATT_LOW_v2_OFFSET, 1, 1000,
		15625, -2000, fg_encode_voltage, NULL),
	PARAM(FLOAT_VOLT, FLOAT_VOLT_v2_WORD, FLOAT_VOLT_v2_OFFSET, 1, 1000,
		15625, -2000, fg_encode_voltage, NULL),
	PARAM(VBATT_FULL, VBATT_FULL_WORD, VBATT_FULL_OFFSET, 2, 1000000,
		244141, 0, fg_encode_voltage, NULL),
	PARAM(SYS_TERM_CURR, SYS_TERM_CURR_WORD, SYS_TERM_CURR_OFFSET, 3,
		1000000, 122070, 0, fg_encode_current, NULL),
	PARAM(CHG_TERM_CURR, CHG_TERM_CURR_v2_WORD, CHG_TERM_CURR_v2_OFFSET, 1,
		100000, 390625, 0, fg_encode_current, NULL),
	PARAM(DELTA_SOC_THR, DELTA_SOC_THR_v2_WORD, DELTA_SOC_THR_v2_OFFSET, 1,
		2048, 100, 0, fg_encode_default, NULL),
	PARAM(RECHARGE_SOC_THR, RECHARGE_SOC_THR_v2_WORD,
		RECHARGE_SOC_THR_v2_OFFSET, 1, 256, 100, 0, fg_encode_default,
		NULL),
	PARAM(ESR_TIMER_DISCHG_MAX, ESR_TIMER_DISCHG_MAX_WORD,
		ESR_TIMER_DISCHG_MAX_OFFSET, 2, 1, 1, 0, fg_encode_default,
		NULL),
	PARAM(ESR_TIMER_DISCHG_INIT, ESR_TIMER_DISCHG_INIT_WORD,
		ESR_TIMER_DISCHG_INIT_OFFSET, 2, 1, 1, 0, fg_encode_default,
		NULL),
	PARAM(ESR_TIMER_CHG_MAX, ESR_TIMER_CHG_MAX_WORD,
		ESR_TIMER_CHG_MAX_OFFSET, 2, 1, 1, 0, fg_encode_default, NULL),
	PARAM(ESR_TIMER_CHG_INIT, ESR_TIMER_CHG_INIT_WORD,
		ESR_TIMER_CHG_INIT_OFFSET, 2, 1, 1, 0, fg_encode_default, NULL),
	PARAM(KI_COEFF_MED_DISCHG, KI_COEFF_MED_DISCHG_v2_WORD,
		KI_COEFF_MED_DISCHG_v2_OFFSET, 1, 1000, 244141, 0,
		fg_encode_default, NULL),
	PARAM(KI_COEFF_HI_DISCHG, KI_COEFF_HI_DISCHG_v2_WORD,
		KI_COEFF_HI_DISCHG_v2_OFFSET, 1, 1000, 244141, 0,
		fg_encode_default, NULL),
};

static struct fg_alg_flag pmicobalt_v1_alg_flags[] = {
	[ALG_FLAG_SOC_LT_OTG_MIN]	= {
		.name	= "SOC_LT_OTG_MIN",
		.bit	= BIT(0),
	},
	[ALG_FLAG_SOC_LT_RECHARGE]	= {
		.name	= "SOC_LT_RECHARGE",
		.bit	= BIT(1),
	},
	[ALG_FLAG_IBATT_LT_ITERM]	= {
		.name	= "IBATT_LT_ITERM",
		.bit	= BIT(2),
	},
	[ALG_FLAG_IBATT_GT_HPM]		= {
		.name	= "IBATT_GT_HPM",
		.bit	= BIT(3),
	},
	[ALG_FLAG_IBATT_GT_UPM]		= {
		.name	= "IBATT_GT_UPM",
		.bit	= BIT(4),
	},
	[ALG_FLAG_VBATT_LT_RECHARGE]	= {
		.name	= "VBATT_LT_RECHARGE",
		.bit	= BIT(5),
	},
	[ALG_FLAG_VBATT_GT_VFLOAT]	= {
		.invalid = true,
	},
};

static struct fg_alg_flag pmicobalt_v2_alg_flags[] = {
	[ALG_FLAG_SOC_LT_OTG_MIN]	= {
		.name	= "SOC_LT_OTG_MIN",
		.bit	= BIT(0),
	},
	[ALG_FLAG_SOC_LT_RECHARGE]	= {
		.name	= "SOC_LT_RECHARGE",
		.bit	= BIT(1),
	},
	[ALG_FLAG_IBATT_LT_ITERM]	= {
		.name	= "IBATT_LT_ITERM",
		.bit	= BIT(2),
	},
	[ALG_FLAG_IBATT_GT_HPM]		= {
		.name	= "IBATT_GT_HPM",
		.bit	= BIT(4),
	},
	[ALG_FLAG_IBATT_GT_UPM]		= {
		.name	= "IBATT_GT_UPM",
		.bit	= BIT(5),
	},
	[ALG_FLAG_VBATT_LT_RECHARGE]	= {
		.name	= "VBATT_LT_RECHARGE",
		.bit	= BIT(6),
	},
	[ALG_FLAG_VBATT_GT_VFLOAT]	= {
		.name	= "VBATT_GT_VFLOAT",
		.bit	= BIT(7),
	},
};

static int fg_gen3_debug_mask;
module_param_named(
	debug_mask, fg_gen3_debug_mask, int, 0600
);

static int fg_sram_update_period_ms = 30000;
module_param_named(
	sram_update_period_ms, fg_sram_update_period_ms, int, 0600
);

static bool fg_sram_dump;
module_param_named(
	sram_dump, fg_sram_dump, bool, 0600
);

static int fg_restart;

/* All getters HERE */

#define VOLTAGE_15BIT_MASK	GENMASK(14, 0)
static int fg_decode_voltage_15b(struct fg_sram_param *sp,
				enum fg_sram_param_id id, int value)
{
	value &= VOLTAGE_15BIT_MASK;
	sp[id].value = div_u64((u64)value * sp[id].numrtr, sp[id].denmtr);
	pr_debug("id: %d raw value: %x decoded value: %x\n", id, value,
		sp[id].value);
	return sp[id].value;
}

static int fg_decode_cc_soc(struct fg_sram_param *sp,
				enum fg_sram_param_id id, int value)
{
	sp[id].value = div_s64((s64)value * sp[id].numrtr, sp[id].denmtr);
	sp[id].value = sign_extend32(sp[id].value, 31);
	pr_debug("id: %d raw value: %x decoded value: %x\n", id, value,
		sp[id].value);
	return sp[id].value;
}

static int fg_decode_value_16b(struct fg_sram_param *sp,
				enum fg_sram_param_id id, int value)
{
	sp[id].value = div_u64((u64)(u16)value * sp[id].numrtr, sp[id].denmtr);
	pr_debug("id: %d raw value: %x decoded value: %x\n", id, value,
		sp[id].value);
	return sp[id].value;
}

static int fg_decode_default(struct fg_sram_param *sp, enum fg_sram_param_id id,
				int value)
{
	sp[id].value = value;
	return sp[id].value;
}

static int fg_decode(struct fg_sram_param *sp, enum fg_sram_param_id id,
			int value)
{
	if (!sp[id].decode) {
		pr_err("No decoding function for parameter %d\n", id);
		return -EINVAL;
	}

	return sp[id].decode(sp, id, value);
}

static void fg_encode_voltage(struct fg_sram_param *sp,
				enum fg_sram_param_id  id, int val_mv, u8 *buf)
{
	int i, mask = 0xff;
	int64_t temp;

	val_mv += sp[id].offset;
	temp = (int64_t)div_u64((u64)val_mv * sp[id].numrtr, sp[id].denmtr);
	pr_debug("temp: %llx id: %d, val_mv: %d, buf: [ ", temp, id, val_mv);
	for (i = 0; i < sp[id].len; i++) {
		buf[i] = temp & mask;
		temp >>= 8;
		pr_debug("%x ", buf[i]);
	}
	pr_debug("]\n");
}

static void fg_encode_current(struct fg_sram_param *sp,
				enum fg_sram_param_id  id, int val_ma, u8 *buf)
{
	int i, mask = 0xff;
	int64_t temp;
	s64 current_ma;

	current_ma = val_ma;
	temp = (int64_t)div_s64(current_ma * sp[id].numrtr, sp[id].denmtr);
	pr_debug("temp: %llx id: %d, val: %d, buf: [ ", temp, id, val_ma);
	for (i = 0; i < sp[id].len; i++) {
		buf[i] = temp & mask;
		temp >>= 8;
		pr_debug("%x ", buf[i]);
	}
	pr_debug("]\n");
}

static void fg_encode_default(struct fg_sram_param *sp,
				enum fg_sram_param_id  id, int val, u8 *buf)
{
	int i, mask = 0xff;
	int64_t temp;

	temp = DIV_ROUND_CLOSEST(val * sp[id].numrtr, sp[id].denmtr);
	pr_debug("temp: %llx id: %d, val: %d, buf: [ ", temp, id, val);
	for (i = 0; i < sp[id].len; i++) {
		buf[i] = temp & mask;
		temp >>= 8;
		pr_debug("%x ", buf[i]);
	}
	pr_debug("]\n");
}

static void fg_encode(struct fg_sram_param *sp, enum fg_sram_param_id id,
			int val, u8 *buf)
{
	if (!sp[id].encode) {
		pr_err("No encoding function for parameter %d\n", id);
		return;
	}

	sp[id].encode(sp, id, val, buf);
}

/*
 * Please make sure *_sram_params table has the entry for the parameter
 * obtained through this function. In addition to address, offset,
 * length from where this SRAM parameter is read, a decode function
 * need to be specified.
 */
static int fg_get_sram_prop(struct fg_chip *chip, enum fg_sram_param_id id,
				int *val)
{
	int temp, rc, i;
	u8 buf[4];

	if (id < 0 || id > FG_SRAM_MAX || chip->sp[id].len > sizeof(buf))
		return -EINVAL;

	if (chip->battery_missing)
		return -ENODATA;

	rc = fg_sram_read(chip, chip->sp[id].addr_word, chip->sp[id].addr_byte,
		buf, chip->sp[id].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error reading address 0x%04x[%d] rc=%d\n",
			chip->sp[id].addr_word, chip->sp[id].addr_byte, rc);
		return rc;
	}

	for (i = 0, temp = 0; i < chip->sp[id].len; i++)
		temp |= buf[i] << (8 * i);

	*val = fg_decode(chip->sp, id, temp);
	return 0;
}

#define CC_SOC_30BIT	GENMASK(29, 0)
static int fg_get_cc_soc(struct fg_chip *chip, int *val)
{
	int rc, cc_soc;

	rc = fg_get_sram_prop(chip, FG_SRAM_CC_SOC, &cc_soc);
	if (rc < 0) {
		pr_err("Error in getting CC_SOC, rc=%d\n", rc);
		return rc;
	}

	*val = div_s64(cc_soc * chip->cl.nom_cap_uah, CC_SOC_30BIT);
	return 0;
}

static int fg_get_cc_soc_sw(struct fg_chip *chip, int *val)
{
	int rc, cc_soc;

	rc = fg_get_sram_prop(chip, FG_SRAM_CC_SOC_SW, &cc_soc);
	if (rc < 0) {
		pr_err("Error in getting CC_SOC_SW, rc=%d\n", rc);
		return rc;
	}

	*val = div_s64(cc_soc * chip->cl.learned_cc_uah, CC_SOC_30BIT);
	return 0;
}

#define BATT_TEMP_NUMR		1
#define BATT_TEMP_DENR		1
static int fg_get_battery_temp(struct fg_chip *chip, int *val)
{
	int rc = 0, temp;
	u8 buf[2];

	rc = fg_read(chip, BATT_INFO_BATT_TEMP_LSB(chip), buf, 2);
	if (rc < 0) {
		pr_err("failed to read addr=0x%04x, rc=%d\n",
			BATT_INFO_BATT_TEMP_LSB(chip), rc);
		return rc;
	}

	temp = ((buf[1] & BATT_TEMP_MSB_MASK) << 8) |
		(buf[0] & BATT_TEMP_LSB_MASK);
	temp = DIV_ROUND_CLOSEST(temp, 4);

	/* Value is in Kelvin; Convert it to deciDegC */
	temp = (temp - 273) * 10;
	*val = temp;
	return 0;
}

#define BATT_ESR_NUMR		244141
#define BATT_ESR_DENR		1000
static int fg_get_battery_esr(struct fg_chip *chip, int *val)
{
	int rc = 0;
	u16 temp = 0;
	u8 buf[2];

	rc = fg_read(chip, BATT_INFO_ESR_LSB(chip), buf, 2);
	if (rc < 0) {
		pr_err("failed to read addr=0x%04x, rc=%d\n",
			BATT_INFO_ESR_LSB(chip), rc);
		return rc;
	}

	if (chip->pmic_rev_id->rev4 < PMICOBALT_V2P0_REV4)
		temp = ((buf[0] & ESR_MSB_MASK) << 8) |
			(buf[1] & ESR_LSB_MASK);
	else
		temp = ((buf[1] & ESR_MSB_MASK) << 8) |
			(buf[0] & ESR_LSB_MASK);

	pr_debug("buf: %x %x temp: %x\n", buf[0], buf[1], temp);
	*val = div_u64((u64)temp * BATT_ESR_NUMR, BATT_ESR_DENR);
	return 0;
}

static int fg_get_battery_resistance(struct fg_chip *chip, int *val)
{
	int rc, esr, rslow;

	rc = fg_get_battery_esr(chip, &esr);
	if (rc < 0) {
		pr_err("failed to get ESR, rc=%d\n", rc);
		return rc;
	}

	rc = fg_get_sram_prop(chip, FG_SRAM_RSLOW, &rslow);
	if (rc < 0) {
		pr_err("failed to get Rslow, rc=%d\n", rc);
		return rc;
	}

	*val = esr + rslow;
	return 0;
}

#define BATT_CURRENT_NUMR	488281
#define BATT_CURRENT_DENR	1000
static int fg_get_battery_current(struct fg_chip *chip, int *val)
{
	int rc = 0;
	int64_t temp = 0;
	u8 buf[2];

	rc = fg_read(chip, BATT_INFO_IBATT_LSB(chip), buf, 2);
	if (rc < 0) {
		pr_err("failed to read addr=0x%04x, rc=%d\n",
			BATT_INFO_IBATT_LSB(chip), rc);
		return rc;
	}

	if (chip->pmic_rev_id->rev4 < PMICOBALT_V2P0_REV4)
		temp = buf[0] << 8 | buf[1];
	else
		temp = buf[1] << 8 | buf[0];

	pr_debug("buf: %x %x temp: %llx\n", buf[0], buf[1], temp);
	/* Sign bit is bit 15 */
	temp = twos_compliment_extend(temp, 15);
	*val = div_s64((s64)temp * BATT_CURRENT_NUMR, BATT_CURRENT_DENR);
	return 0;
}

#define BATT_VOLTAGE_NUMR	122070
#define BATT_VOLTAGE_DENR	1000
static int fg_get_battery_voltage(struct fg_chip *chip, int *val)
{
	int rc = 0;
	u16 temp = 0;
	u8 buf[2];

	rc = fg_read(chip, BATT_INFO_VBATT_LSB(chip), buf, 2);
	if (rc < 0) {
		pr_err("failed to read addr=0x%04x, rc=%d\n",
			BATT_INFO_VBATT_LSB(chip), rc);
		return rc;
	}

	if (chip->pmic_rev_id->rev4 < PMICOBALT_V2P0_REV4)
		temp = buf[0] << 8 | buf[1];
	else
		temp = buf[1] << 8 | buf[0];

	pr_debug("buf: %x %x temp: %x\n", buf[0], buf[1], temp);
	*val = div_u64((u64)temp * BATT_VOLTAGE_NUMR, BATT_VOLTAGE_DENR);
	return 0;
}

#define MAX_TRIES_SOC		5
static int fg_get_msoc_raw(struct fg_chip *chip, int *val)
{
	u8 cap[2];
	int rc, tries = 0;

	while (tries < MAX_TRIES_SOC) {
		rc = fg_read(chip, BATT_SOC_FG_MONOTONIC_SOC(chip), cap, 2);
		if (rc < 0) {
			pr_err("failed to read addr=0x%04x, rc=%d\n",
				BATT_SOC_FG_MONOTONIC_SOC(chip), rc);
			return rc;
		}

		if (cap[0] == cap[1])
			break;

		tries++;
	}

	if (tries == MAX_TRIES_SOC) {
		pr_err("shadow registers do not match\n");
		return -EINVAL;
	}

	fg_dbg(chip, FG_POWER_SUPPLY, "raw: 0x%02x\n", cap[0]);
	*val = cap[0];
	return 0;
}

#define FULL_CAPACITY	100
#define FULL_SOC_RAW	255
static int fg_get_prop_capacity(struct fg_chip *chip, int *val)
{
	int rc, msoc;

	if (chip->charge_full) {
		*val = FULL_CAPACITY;
		return 0;
	}

	rc = fg_get_msoc_raw(chip, &msoc);
	if (rc < 0)
		return rc;

	*val = DIV_ROUND_CLOSEST(msoc * FULL_CAPACITY, FULL_SOC_RAW);
	return 0;
}

#define DEFAULT_BATT_TYPE	"Unknown Battery"
#define MISSING_BATT_TYPE	"Missing Battery"
#define LOADING_BATT_TYPE	"Loading Battery"
static const char *fg_get_battery_type(struct fg_chip *chip)
{
	if (chip->battery_missing)
		return MISSING_BATT_TYPE;

	if (chip->bp.batt_type_str) {
		if (chip->profile_loaded)
			return chip->bp.batt_type_str;
		else
			return LOADING_BATT_TYPE;
	}

	return DEFAULT_BATT_TYPE;
}

static int fg_get_batt_id(struct fg_chip *chip, int *val)
{
	int rc, batt_id = -EINVAL;

	if (!chip->batt_id_chan)
		return -EINVAL;

	rc = iio_read_channel_processed(chip->batt_id_chan, &batt_id);
	if (rc < 0) {
		pr_err("Error in reading batt_id channel, rc:%d\n", rc);
		return rc;
	}

	fg_dbg(chip, FG_STATUS, "batt_id: %d\n", batt_id);

	*val = batt_id;
	return 0;
}

static int fg_get_batt_profile(struct fg_chip *chip)
{
	struct device_node *node = chip->dev->of_node;
	struct device_node *batt_node, *profile_node;
	const char *data;
	int rc, len, batt_id;

	rc = fg_get_batt_id(chip, &batt_id);
	if (rc < 0) {
		pr_err("Error in getting batt_id rc:%d\n", rc);
		return rc;
	}

	batt_id /= 1000;
	chip->batt_id = batt_id;
	batt_node = of_find_node_by_name(node, "qcom,battery-data");
	if (!batt_node) {
		pr_err("Batterydata not available\n");
		return -ENXIO;
	}

	profile_node = of_batterydata_get_best_profile(batt_node, batt_id,
				NULL);
	if (IS_ERR(profile_node))
		return PTR_ERR(profile_node);

	if (!profile_node) {
		pr_err("couldn't find profile handle\n");
		return -ENODATA;
	}

	rc = of_property_read_string(profile_node, "qcom,battery-type",
			&chip->bp.batt_type_str);
	if (rc < 0) {
		pr_err("battery type unavailable, rc:%d\n", rc);
		return rc;
	}

	rc = of_property_read_u32(profile_node, "qcom,max-voltage-uv",
			&chip->bp.float_volt_uv);
	if (rc < 0) {
		pr_err("battery float voltage unavailable, rc:%d\n", rc);
		chip->bp.float_volt_uv = -EINVAL;
	}

	rc = of_property_read_u32(profile_node, "qcom,nom-batt-capacity-mah",
			&chip->bp.fastchg_curr_ma);
	if (rc < 0) {
		pr_err("battery nominal capacity unavailable, rc:%d\n", rc);
		chip->bp.fastchg_curr_ma = -EINVAL;
	}

	rc = of_property_read_u32(profile_node, "qcom,fg-cc-cv-threshold-mv",
			&chip->bp.vbatt_full_mv);
	if (rc < 0) {
		pr_err("battery cc_cv threshold unavailable, rc:%d\n", rc);
		chip->bp.vbatt_full_mv = -EINVAL;
	}

	data = of_get_property(profile_node, "qcom,fg-profile-data", &len);
	if (!data) {
		pr_err("No profile data available\n");
		return -ENODATA;
	}

	if (len != PROFILE_LEN) {
		pr_err("battery profile incorrect size: %d\n", len);
		return -EINVAL;
	}

	chip->profile_available = true;
	memcpy(chip->batt_profile, data, len);
	return 0;
}

static inline void get_temp_setpoint(int threshold, u8 *val)
{
	/* Resolution is 0.5C. Base is -30C. */
	*val = DIV_ROUND_CLOSEST((threshold + 30) * 10, 5);
}

static inline void get_batt_temp_delta(int delta, u8 *val)
{
	switch (delta) {
	case 2:
		*val = BTEMP_DELTA_2K;
		break;
	case 4:
		*val = BTEMP_DELTA_4K;
		break;
	case 6:
		*val = BTEMP_DELTA_6K;
		break;
	case 10:
		*val = BTEMP_DELTA_10K;
		break;
	default:
		*val = BTEMP_DELTA_2K;
		break;
	};
}

static int fg_set_esr_timer(struct fg_chip *chip, int cycles, bool charging,
				int flags)
{
	u8 buf[2];
	int rc, timer_max, timer_init;

	if (charging) {
		timer_max = FG_SRAM_ESR_TIMER_CHG_MAX;
		timer_init = FG_SRAM_ESR_TIMER_CHG_INIT;
	} else {
		timer_max = FG_SRAM_ESR_TIMER_DISCHG_MAX;
		timer_init = FG_SRAM_ESR_TIMER_DISCHG_INIT;
	}

	fg_encode(chip->sp, timer_max, cycles, buf);
	rc = fg_sram_write(chip,
			chip->sp[timer_max].addr_word,
			chip->sp[timer_max].addr_byte, buf,
			chip->sp[timer_max].len, flags);
	if (rc < 0) {
		pr_err("Error in writing esr_timer_dischg_max, rc=%d\n",
			rc);
		return rc;
	}

	fg_encode(chip->sp, timer_init, cycles, buf);
	rc = fg_sram_write(chip,
			chip->sp[timer_init].addr_word,
			chip->sp[timer_init].addr_byte, buf,
			chip->sp[timer_init].len, flags);
	if (rc < 0) {
		pr_err("Error in writing esr_timer_dischg_init, rc=%d\n",
			rc);
		return rc;
	}

	return 0;
}

/* Other functions HERE */

static int fg_awake_cb(struct votable *votable, void *data, int awake,
			const char *client)
{
	struct fg_chip *chip = data;

	if (awake)
		pm_stay_awake(chip->dev);
	else
		pm_relax(chip->dev);

	pr_debug("client: %s awake: %d\n", client, awake);
	return 0;
}

static bool is_charger_available(struct fg_chip *chip)
{
	if (!chip->batt_psy)
		chip->batt_psy = power_supply_get_by_name("battery");

	if (!chip->batt_psy)
		return false;

	return true;
}

static int fg_save_learned_cap_to_sram(struct fg_chip *chip)
{
	int16_t cc_mah;
	int rc;

	if (chip->battery_missing || !chip->cl.learned_cc_uah)
		return -EPERM;

	cc_mah = div64_s64(chip->cl.learned_cc_uah, 1000);
	/* Write to a backup register to use across reboot */
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_ACT_BATT_CAP].addr_word,
			chip->sp[FG_SRAM_ACT_BATT_CAP].addr_byte, (u8 *)&cc_mah,
			chip->sp[FG_SRAM_ACT_BATT_CAP].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing act_batt_cap_bkup, rc=%d\n", rc);
		return rc;
	}

	/* Write to actual capacity register for coulomb counter operation */
	rc = fg_sram_write(chip, ACT_BATT_CAP_WORD, ACT_BATT_CAP_OFFSET,
			(u8 *)&cc_mah, chip->sp[FG_SRAM_ACT_BATT_CAP].len,
			FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing act_batt_cap, rc=%d\n", rc);
		return rc;
	}

	fg_dbg(chip, FG_CAP_LEARN, "learned capacity %llduah/%dmah stored\n",
		chip->cl.learned_cc_uah, cc_mah);
	return 0;
}

#define CAPACITY_DELTA_DECIPCT	500
static int fg_load_learned_cap_from_sram(struct fg_chip *chip)
{
	int rc, act_cap_mah;
	int64_t delta_cc_uah, pct_nom_cap_uah;

	rc = fg_get_sram_prop(chip, FG_SRAM_ACT_BATT_CAP, &act_cap_mah);
	if (rc < 0) {
		pr_err("Error in getting ACT_BATT_CAP, rc=%d\n", rc);
		return rc;
	}

	chip->cl.learned_cc_uah = act_cap_mah * 1000;

	if (chip->cl.learned_cc_uah != chip->cl.nom_cap_uah) {
		if (chip->cl.learned_cc_uah == 0)
			chip->cl.learned_cc_uah = chip->cl.nom_cap_uah;

		delta_cc_uah = abs(chip->cl.learned_cc_uah -
					chip->cl.nom_cap_uah);
		pct_nom_cap_uah = div64_s64((int64_t)chip->cl.nom_cap_uah *
				CAPACITY_DELTA_DECIPCT, 1000);
		/*
		 * If the learned capacity is out of range by 50% from the
		 * nominal capacity, then overwrite the learned capacity with
		 * the nominal capacity.
		 */
		if (chip->cl.nom_cap_uah && delta_cc_uah > pct_nom_cap_uah) {
			fg_dbg(chip, FG_CAP_LEARN, "learned_cc_uah: %lld is higher than expected, capping it to nominal: %lld\n",
				chip->cl.learned_cc_uah, chip->cl.nom_cap_uah);
			chip->cl.learned_cc_uah = chip->cl.nom_cap_uah;
		}

		rc = fg_save_learned_cap_to_sram(chip);
		if (rc < 0)
			pr_err("Error in saving learned_cc_uah, rc=%d\n", rc);
	}

	fg_dbg(chip, FG_CAP_LEARN, "learned_cc_uah:%lld nom_cap_uah: %lld\n",
		chip->cl.learned_cc_uah, chip->cl.nom_cap_uah);
	return 0;
}

static bool is_temp_valid_cap_learning(struct fg_chip *chip)
{
	int rc, batt_temp;

	rc = fg_get_battery_temp(chip, &batt_temp);
	if (rc < 0) {
		pr_err("Error in getting batt_temp\n");
		return false;
	}

	if (batt_temp > chip->dt.cl_max_temp ||
		batt_temp < chip->dt.cl_min_temp) {
		fg_dbg(chip, FG_CAP_LEARN, "batt temp %d out of range [%d %d]\n",
			batt_temp, chip->dt.cl_min_temp, chip->dt.cl_max_temp);
		return false;
	}

	return true;
}

static void fg_cap_learning_post_process(struct fg_chip *chip)
{
	int64_t max_inc_val, min_dec_val, old_cap;
	int rc;

	max_inc_val = chip->cl.learned_cc_uah
			* (1000 + chip->dt.cl_max_cap_inc);
	do_div(max_inc_val, 1000);

	min_dec_val = chip->cl.learned_cc_uah
			* (1000 - chip->dt.cl_max_cap_dec);
	do_div(min_dec_val, 1000);

	old_cap = chip->cl.learned_cc_uah;
	if (chip->cl.final_cc_uah > max_inc_val)
		chip->cl.learned_cc_uah = max_inc_val;
	else if (chip->cl.final_cc_uah < min_dec_val)
		chip->cl.learned_cc_uah = min_dec_val;
	else
		chip->cl.learned_cc_uah =
			chip->cl.final_cc_uah;

	if (chip->dt.cl_max_cap_limit) {
		max_inc_val = (int64_t)chip->cl.nom_cap_uah * (1000 +
				chip->dt.cl_max_cap_limit);
		do_div(max_inc_val, 1000);
		if (chip->cl.final_cc_uah > max_inc_val) {
			fg_dbg(chip, FG_CAP_LEARN, "learning capacity %lld goes above max limit %lld\n",
				chip->cl.final_cc_uah, max_inc_val);
			chip->cl.learned_cc_uah = max_inc_val;
		}
	}

	if (chip->dt.cl_min_cap_limit) {
		min_dec_val = (int64_t)chip->cl.nom_cap_uah * (1000 -
				chip->dt.cl_min_cap_limit);
		do_div(min_dec_val, 1000);
		if (chip->cl.final_cc_uah < min_dec_val) {
			fg_dbg(chip, FG_CAP_LEARN, "learning capacity %lld goes below min limit %lld\n",
				chip->cl.final_cc_uah, min_dec_val);
			chip->cl.learned_cc_uah = min_dec_val;
		}
	}

	rc = fg_save_learned_cap_to_sram(chip);
	if (rc < 0)
		pr_err("Error in saving learned_cc_uah, rc=%d\n", rc);

	fg_dbg(chip, FG_CAP_LEARN, "final cc_uah = %lld, learned capacity %lld -> %lld uah\n",
		chip->cl.final_cc_uah, old_cap, chip->cl.learned_cc_uah);
}

static int  fg_cap_learning_process_full_data(struct fg_chip *chip)
{
	int rc, cc_soc_sw, cc_soc_delta_pct;
	int64_t delta_cc_uah;

	rc = fg_get_sram_prop(chip, FG_SRAM_CC_SOC_SW, &cc_soc_sw);
	if (rc < 0) {
		pr_err("Error in getting CC_SOC_SW, rc=%d\n", rc);
		return rc;
	}

	cc_soc_delta_pct = DIV_ROUND_CLOSEST(
				abs(cc_soc_sw - chip->cl.init_cc_soc_sw) * 100,
				CC_SOC_30BIT);
	delta_cc_uah = div64_s64(chip->cl.learned_cc_uah * cc_soc_delta_pct,
				100);
	chip->cl.final_cc_uah = chip->cl.init_cc_uah + delta_cc_uah;
	fg_dbg(chip, FG_CAP_LEARN, "Current cc_soc=%d cc_soc_delta_pct=%d total_cc_uah=%lld\n",
		cc_soc_sw, cc_soc_delta_pct, chip->cl.final_cc_uah);
	return 0;
}

static int fg_cap_learning_begin(struct fg_chip *chip, int batt_soc)
{
	int rc, cc_soc_sw;

	if (DIV_ROUND_CLOSEST(batt_soc * 100, FULL_SOC_RAW) >
		chip->dt.cl_start_soc) {
		fg_dbg(chip, FG_CAP_LEARN, "Battery SOC %d is high!, not starting\n",
			batt_soc);
		return -EINVAL;
	}

	chip->cl.init_cc_uah = div64_s64(chip->cl.learned_cc_uah * batt_soc,
					FULL_SOC_RAW);
	rc = fg_get_sram_prop(chip, FG_SRAM_CC_SOC_SW, &cc_soc_sw);
	if (rc < 0) {
		pr_err("Error in getting CC_SOC_SW, rc=%d\n", rc);
		return rc;
	}

	chip->cl.init_cc_soc_sw = cc_soc_sw;
	chip->cl.active = true;
	fg_dbg(chip, FG_CAP_LEARN, "Capacity learning started @ battery SOC %d init_cc_soc_sw:%d\n",
		batt_soc, chip->cl.init_cc_soc_sw);
	return 0;
}

static int fg_cap_learning_done(struct fg_chip *chip)
{
	int rc, cc_soc_sw;

	rc = fg_cap_learning_process_full_data(chip);
	if (rc < 0) {
		pr_err("Error in processing cap learning full data, rc=%d\n",
			rc);
		goto out;
	}

	/* Write a FULL value to cc_soc_sw */
	cc_soc_sw = CC_SOC_30BIT;
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_CC_SOC_SW].addr_word,
		chip->sp[FG_SRAM_CC_SOC_SW].addr_byte, (u8 *)&cc_soc_sw,
		chip->sp[FG_SRAM_CC_SOC_SW].len, FG_IMA_ATOMIC);
	if (rc < 0) {
		pr_err("Error in writing cc_soc_sw, rc=%d\n", rc);
		goto out;
	}

	fg_cap_learning_post_process(chip);
out:
	return rc;
}

#define FULL_SOC_RAW	255
static void fg_cap_learning_update(struct fg_chip *chip)
{
	int rc, batt_soc;

	mutex_lock(&chip->cl.lock);

	if (!is_temp_valid_cap_learning(chip) || !chip->cl.learned_cc_uah ||
		chip->battery_missing) {
		fg_dbg(chip, FG_CAP_LEARN, "Aborting cap_learning %lld\n",
			chip->cl.learned_cc_uah);
		chip->cl.active = false;
		chip->cl.init_cc_uah = 0;
		goto out;
	}

	rc = fg_get_sram_prop(chip, FG_SRAM_BATT_SOC, &batt_soc);
	if (rc < 0) {
		pr_err("Error in getting ACT_BATT_CAP, rc=%d\n", rc);
		goto out;
	}

	/* We need only the most significant byte here */
	batt_soc = (u32)batt_soc >> 24;

	fg_dbg(chip, FG_CAP_LEARN, "Chg_status: %d cl_active: %d batt_soc: %d\n",
		chip->status, chip->cl.active, batt_soc);

	/* Initialize the starting point of learning capacity */
	if (!chip->cl.active) {
		if (chip->status == POWER_SUPPLY_STATUS_CHARGING) {
			rc = fg_cap_learning_begin(chip, batt_soc);
			chip->cl.active = (rc == 0);
		}

	} else {
		if (chip->charge_done) {
			rc = fg_cap_learning_done(chip);
			if (rc < 0)
				pr_err("Error in completing capacity learning, rc=%d\n",
					rc);

			chip->cl.active = false;
			chip->cl.init_cc_uah = 0;
		}

		if (chip->status == POWER_SUPPLY_STATUS_NOT_CHARGING) {
			fg_dbg(chip, FG_CAP_LEARN, "Capacity learning aborted @ battery SOC %d\n",
				batt_soc);
			chip->cl.active = false;
			chip->cl.init_cc_uah = 0;
		}
	}

out:
	mutex_unlock(&chip->cl.lock);
}

#define KI_COEFF_MED_DISCHG_DEFAULT	1500
#define KI_COEFF_HI_DISCHG_DEFAULT	2200
static int fg_adjust_ki_coeff_dischg(struct fg_chip *chip)
{
	int rc, i, msoc;
	int ki_coeff_med = KI_COEFF_MED_DISCHG_DEFAULT;
	int ki_coeff_hi = KI_COEFF_HI_DISCHG_DEFAULT;
	u8 val;

	if (!chip->ki_coeff_dischg_en)
		return 0;

	rc = fg_get_prop_capacity(chip, &msoc);
	if (rc < 0) {
		pr_err("Error in getting capacity, rc=%d\n", rc);
		return rc;
	}

	if (chip->status == POWER_SUPPLY_STATUS_DISCHARGING) {
		for (i = KI_COEFF_SOC_LEVELS - 1; i >= 0; i--) {
			if (msoc < chip->dt.ki_coeff_soc[i]) {
				ki_coeff_med = chip->dt.ki_coeff_med_dischg[i];
				ki_coeff_hi = chip->dt.ki_coeff_hi_dischg[i];
			}
		}
	}

	fg_encode(chip->sp, FG_SRAM_KI_COEFF_MED_DISCHG, ki_coeff_med, &val);
	rc = fg_sram_write(chip,
			chip->sp[FG_SRAM_KI_COEFF_MED_DISCHG].addr_word,
			chip->sp[FG_SRAM_KI_COEFF_MED_DISCHG].addr_byte, &val,
			chip->sp[FG_SRAM_KI_COEFF_MED_DISCHG].len,
			FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing ki_coeff_med, rc=%d\n", rc);
		return rc;
	}

	fg_encode(chip->sp, FG_SRAM_KI_COEFF_HI_DISCHG, ki_coeff_hi, &val);
	rc = fg_sram_write(chip,
			chip->sp[FG_SRAM_KI_COEFF_HI_DISCHG].addr_word,
			chip->sp[FG_SRAM_KI_COEFF_HI_DISCHG].addr_byte, &val,
			chip->sp[FG_SRAM_KI_COEFF_HI_DISCHG].len,
			FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing ki_coeff_hi, rc=%d\n", rc);
		return rc;
	}

	fg_dbg(chip, FG_STATUS, "Wrote ki_coeff_med %d ki_coeff_hi %d\n",
		ki_coeff_med, ki_coeff_hi);
	return 0;
}

static int fg_charge_full_update(struct fg_chip *chip)
{
	union power_supply_propval prop = {0, };
	int rc, msoc, bsoc, recharge_soc;
	u8 full_soc[2] = {0xFF, 0xFF};

	if (!chip->dt.hold_soc_while_full)
		return 0;

	if (!is_charger_available(chip))
		return 0;

	rc = power_supply_get_property(chip->batt_psy, POWER_SUPPLY_PROP_HEALTH,
		&prop);
	if (rc < 0) {
		pr_err("Error in getting battery health, rc=%d\n", rc);
		return rc;
	}

	chip->health = prop.intval;
	recharge_soc = chip->dt.recharge_soc_thr;
	recharge_soc = DIV_ROUND_CLOSEST(recharge_soc * FULL_SOC_RAW,
				FULL_CAPACITY);
	rc = fg_get_sram_prop(chip, FG_SRAM_BATT_SOC, &bsoc);
	if (rc < 0) {
		pr_err("Error in getting BATT_SOC, rc=%d\n", rc);
		return rc;
	}

	/* We need 2 most significant bytes here */
	bsoc = (u32)bsoc >> 16;
	rc = fg_get_prop_capacity(chip, &msoc);
	if (rc < 0) {
		pr_err("Error in getting capacity, rc=%d\n", rc);
		return rc;
	}

	fg_dbg(chip, FG_STATUS, "msoc: %d health: %d status: %d\n", msoc,
		chip->health, chip->status);
	if (chip->charge_done) {
		if (msoc >= 99 && chip->health == POWER_SUPPLY_HEALTH_GOOD)
			chip->charge_full = true;
		else
			fg_dbg(chip, FG_STATUS, "Terminated charging @ SOC%d\n",
				msoc);
	} else if ((bsoc >> 8) <= recharge_soc) {
		fg_dbg(chip, FG_STATUS, "bsoc: %d recharge_soc: %d\n",
			bsoc >> 8, recharge_soc);
		chip->charge_full = false;
	}

	if (!chip->charge_full)
		return 0;

	/*
	 * During JEITA conditions, charge_full can happen early. FULL_SOC
	 * and MONOTONIC_SOC needs to be updated to reflect the same. Write
	 * battery SOC to FULL_SOC and write a full value to MONOTONIC_SOC.
	 */
	rc = fg_sram_write(chip, FULL_SOC_WORD, FULL_SOC_OFFSET, (u8 *)&bsoc, 2,
			FG_IMA_ATOMIC);
	if (rc < 0) {
		pr_err("failed to write full_soc rc=%d\n", rc);
		return rc;
	}

	rc = fg_sram_write(chip, MONOTONIC_SOC_WORD, MONOTONIC_SOC_OFFSET,
			full_soc, 2, FG_IMA_ATOMIC);
	if (rc < 0) {
		pr_err("failed to write monotonic_soc rc=%d\n", rc);
		return rc;
	}

	fg_dbg(chip, FG_STATUS, "Set charge_full to true @ soc %d\n", msoc);
	return 0;
}

static int fg_set_recharge_soc(struct fg_chip *chip, int recharge_soc)
{
	u8 buf[4];
	int rc;

	fg_encode(chip->sp, FG_SRAM_RECHARGE_SOC_THR, recharge_soc, buf);
	rc = fg_sram_write(chip,
			chip->sp[FG_SRAM_RECHARGE_SOC_THR].addr_word,
			chip->sp[FG_SRAM_RECHARGE_SOC_THR].addr_byte, buf,
			chip->sp[FG_SRAM_RECHARGE_SOC_THR].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing recharge_soc_thr, rc=%d\n", rc);
		return rc;
	}

	return 0;
}

static int fg_adjust_recharge_soc(struct fg_chip *chip)
{
	int rc, msoc, recharge_soc, new_recharge_soc = 0;

	recharge_soc = chip->dt.recharge_soc_thr;
	/*
	 * If the input is present and charging had been terminated, adjust
	 * the recharge SOC threshold based on the monotonic SOC at which
	 * the charge termination had happened.
	 */
	if (is_input_present(chip) && !chip->recharge_soc_adjusted
		&& chip->charge_done) {
		/* Get raw monotonic SOC for calculation */
		rc = fg_get_msoc_raw(chip, &msoc);
		if (rc < 0) {
			pr_err("Error in getting msoc, rc=%d\n", rc);
			return rc;
		}

		msoc = DIV_ROUND_CLOSEST(msoc * FULL_CAPACITY, FULL_SOC_RAW);
		/* Adjust the recharge_soc threshold */
		new_recharge_soc = msoc - (FULL_CAPACITY - recharge_soc);
	} else if (chip->recharge_soc_adjusted && (!is_input_present(chip)
				|| chip->health == POWER_SUPPLY_HEALTH_GOOD)) {
		/* Restore the default value */
		new_recharge_soc = recharge_soc;
	}

	if (new_recharge_soc > 0 && new_recharge_soc < FULL_CAPACITY) {
		rc = fg_set_recharge_soc(chip, new_recharge_soc);
		if (rc) {
			pr_err("Couldn't set resume SOC for FG, rc=%d\n", rc);
			return rc;
		}

		chip->recharge_soc_adjusted = (new_recharge_soc !=
						recharge_soc);
		fg_dbg(chip, FG_STATUS, "resume soc set to %d\n",
			new_recharge_soc);
	}

	return 0;
}

static void status_change_work(struct work_struct *work)
{
	struct fg_chip *chip = container_of(work,
			struct fg_chip, status_change_work);
	union power_supply_propval prop = {0, };
	int rc;

	if (!is_charger_available(chip)) {
		fg_dbg(chip, FG_STATUS, "Charger not available?!\n");
		goto out;
	}

	rc = power_supply_get_property(chip->batt_psy, POWER_SUPPLY_PROP_STATUS,
			&prop);
	if (rc < 0) {
		pr_err("Error in getting charging status, rc=%d\n", rc);
		goto out;
	}

	chip->status = prop.intval;
	rc = power_supply_get_property(chip->batt_psy,
			POWER_SUPPLY_PROP_CHARGE_DONE, &prop);
	if (rc < 0) {
		pr_err("Error in getting charge_done, rc=%d\n", rc);
		goto out;
	}

	chip->charge_done = prop.intval;
	fg_dbg(chip, FG_POWER_SUPPLY, "curr_status:%d charge_done: %d\n",
		chip->status, chip->charge_done);

	if (chip->cyc_ctr.en)
		schedule_work(&chip->cycle_count_work);

	fg_cap_learning_update(chip);

	rc = fg_charge_full_update(chip);
	if (rc < 0)
		pr_err("Error in charge_full_update, rc=%d\n", rc);

	rc = fg_adjust_recharge_soc(chip);
	if (rc < 0)
		pr_err("Error in adjusting recharge_soc, rc=%d\n", rc);

	rc = fg_adjust_ki_coeff_dischg(chip);
	if (rc < 0)
		pr_err("Error in adjusting ki_coeff_dischg, rc=%d\n", rc);
out:
	pm_relax(chip->dev);
}

static void restore_cycle_counter(struct fg_chip *chip)
{
	int rc = 0, i;
	u8 data[2];

	mutex_lock(&chip->cyc_ctr.lock);
	for (i = 0; i < BUCKET_COUNT; i++) {
		rc = fg_sram_read(chip, CYCLE_COUNT_WORD + (i / 2),
				CYCLE_COUNT_OFFSET + (i % 2) * 2, data, 2,
				FG_IMA_DEFAULT);
		if (rc < 0)
			pr_err("failed to read bucket %d rc=%d\n", i, rc);
		else
			chip->cyc_ctr.count[i] = data[0] | data[1] << 8;
	}
	mutex_unlock(&chip->cyc_ctr.lock);
}

static void clear_cycle_counter(struct fg_chip *chip)
{
	int rc = 0, i;

	if (!chip->cyc_ctr.en)
		return;

	mutex_lock(&chip->cyc_ctr.lock);
	memset(chip->cyc_ctr.count, 0, sizeof(chip->cyc_ctr.count));
	for (i = 0; i < BUCKET_COUNT; i++) {
		chip->cyc_ctr.started[i] = false;
		chip->cyc_ctr.last_soc[i] = 0;
	}
	rc = fg_sram_write(chip, CYCLE_COUNT_WORD, CYCLE_COUNT_OFFSET,
			(u8 *)&chip->cyc_ctr.count,
			sizeof(chip->cyc_ctr.count) / sizeof(u8 *),
			FG_IMA_DEFAULT);
	if (rc < 0)
		pr_err("failed to clear cycle counter rc=%d\n", rc);

	mutex_unlock(&chip->cyc_ctr.lock);
}

static int fg_inc_store_cycle_ctr(struct fg_chip *chip, int bucket)
{
	int rc = 0;
	u16 cyc_count;
	u8 data[2];

	if (bucket < 0 || (bucket > BUCKET_COUNT - 1))
		return 0;

	cyc_count = chip->cyc_ctr.count[bucket];
	cyc_count++;
	data[0] = cyc_count & 0xFF;
	data[1] = cyc_count >> 8;

	rc = fg_sram_write(chip, CYCLE_COUNT_WORD + (bucket / 2),
			CYCLE_COUNT_OFFSET + (bucket % 2) * 2, data, 2,
			FG_IMA_DEFAULT);
	if (rc < 0)
		pr_err("failed to write BATT_CYCLE[%d] rc=%d\n",
			bucket, rc);
	else
		chip->cyc_ctr.count[bucket] = cyc_count;
	return rc;
}

static void cycle_count_work(struct work_struct *work)
{
	int rc = 0, bucket, i, batt_soc;
	struct fg_chip *chip = container_of(work,
				struct fg_chip,
				cycle_count_work);

	mutex_lock(&chip->cyc_ctr.lock);
	rc = fg_get_sram_prop(chip, FG_SRAM_BATT_SOC, &batt_soc);
	if (rc < 0) {
		pr_err("Failed to read battery soc rc: %d\n", rc);
		goto out;
	}

	/* We need only the most significant byte here */
	batt_soc = (u32)batt_soc >> 24;

	if (chip->status == POWER_SUPPLY_STATUS_CHARGING) {
		/* Find out which bucket the SOC falls in */
		bucket = batt_soc / BUCKET_SOC_PCT;
		pr_debug("batt_soc: %d bucket: %d\n", batt_soc, bucket);

		/*
		 * If we've started counting for the previous bucket,
		 * then store the counter for that bucket if the
		 * counter for current bucket is getting started.
		 */
		if (bucket > 0 && chip->cyc_ctr.started[bucket - 1] &&
			!chip->cyc_ctr.started[bucket]) {
			rc = fg_inc_store_cycle_ctr(chip, bucket - 1);
			if (rc < 0) {
				pr_err("Error in storing cycle_ctr rc: %d\n",
					rc);
				goto out;
			} else {
				chip->cyc_ctr.started[bucket - 1] = false;
				chip->cyc_ctr.last_soc[bucket - 1] = 0;
			}
		}
		if (!chip->cyc_ctr.started[bucket]) {
			chip->cyc_ctr.started[bucket] = true;
			chip->cyc_ctr.last_soc[bucket] = batt_soc;
		}
	} else {
		for (i = 0; i < BUCKET_COUNT; i++) {
			if (chip->cyc_ctr.started[i] &&
				batt_soc > chip->cyc_ctr.last_soc[i]) {
				rc = fg_inc_store_cycle_ctr(chip, i);
				if (rc < 0)
					pr_err("Error in storing cycle_ctr rc: %d\n",
						rc);
				chip->cyc_ctr.last_soc[i] = 0;
			}
			chip->cyc_ctr.started[i] = false;
		}
	}
out:
	mutex_unlock(&chip->cyc_ctr.lock);
}

static int fg_get_cycle_count(struct fg_chip *chip)
{
	int count;

	if (!chip->cyc_ctr.en)
		return 0;

	if ((chip->cyc_ctr.id <= 0) || (chip->cyc_ctr.id > BUCKET_COUNT))
		return -EINVAL;

	mutex_lock(&chip->cyc_ctr.lock);
	count = chip->cyc_ctr.count[chip->cyc_ctr.id - 1];
	mutex_unlock(&chip->cyc_ctr.lock);
	return count;
}

static void dump_sram(u8 *buf, int len)
{
	int i;
	char str[16];

	for (i = 0; i < len; i += 4) {
		str[0] = '\0';
		fill_string(str, sizeof(str), buf + i, 4);
		pr_info("%03d %s\n", PROFILE_LOAD_WORD + (i / 4), str);
	}
}

static bool is_profile_load_required(struct fg_chip *chip)
{
	u8 buf[PROFILE_COMP_LEN], val;
	bool profiles_same = false;
	int rc;

	rc = fg_sram_read(chip, PROFILE_INTEGRITY_WORD,
			PROFILE_INTEGRITY_OFFSET, &val, 1, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("failed to read profile integrity rc=%d\n", rc);
		return false;
	}

	/* Check if integrity bit is set */
	if (val == 0x01) {
		fg_dbg(chip, FG_STATUS, "Battery profile integrity bit is set\n");
		rc = fg_sram_read(chip, PROFILE_LOAD_WORD, PROFILE_LOAD_OFFSET,
				buf, PROFILE_COMP_LEN, FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in reading battery profile, rc:%d\n", rc);
			return false;
		}
		profiles_same = memcmp(chip->batt_profile, buf,
					PROFILE_COMP_LEN) == 0;
		if (profiles_same) {
			fg_dbg(chip, FG_STATUS, "Battery profile is same, not loading it\n");
			return false;
		}

		if (!chip->dt.force_load_profile) {
			pr_warn("Profiles doesn't match, skipping loading it since force_load_profile is disabled\n");
			if (fg_sram_dump) {
				pr_info("FG: loaded profile:\n");
				dump_sram(buf, PROFILE_COMP_LEN);
				pr_info("FG: available profile:\n");
				dump_sram(chip->batt_profile, PROFILE_LEN);
			}
			return false;
		}

		fg_dbg(chip, FG_STATUS, "Profiles are different, loading the correct one\n");
	} else {
		fg_dbg(chip, FG_STATUS, "Profile integrity bit is not set\n");
		if (fg_sram_dump) {
			pr_info("FG: profile to be loaded:\n");
			dump_sram(chip->batt_profile, PROFILE_LEN);
		}
	}
	return true;
}

#define SOC_READY_WAIT_MS		2000
static int __fg_restart(struct fg_chip *chip)
{
	int rc, msoc;
	bool tried_again = false;

	rc = fg_get_prop_capacity(chip, &msoc);
	if (rc < 0) {
		pr_err("Error in getting capacity, rc=%d\n", rc);
		return rc;
	}

	chip->last_soc = msoc;
	chip->fg_restarting = true;
	reinit_completion(&chip->soc_ready);
	rc = fg_masked_write(chip, BATT_SOC_RESTART(chip), RESTART_GO_BIT,
			RESTART_GO_BIT);
	if (rc < 0) {
		pr_err("Error in writing to %04x, rc=%d\n",
			BATT_SOC_RESTART(chip), rc);
		goto out;
	}

wait:
	rc = wait_for_completion_interruptible_timeout(&chip->soc_ready,
		msecs_to_jiffies(SOC_READY_WAIT_MS));

	/* If we were interrupted wait again one more time. */
	if (rc == -ERESTARTSYS && !tried_again) {
		tried_again = true;
		goto wait;
	} else if (rc <= 0) {
		pr_err("wait for soc_ready timed out rc=%d\n", rc);
		goto out;
	}

	rc = fg_masked_write(chip, BATT_SOC_RESTART(chip), RESTART_GO_BIT, 0);
	if (rc < 0) {
		pr_err("Error in writing to %04x, rc=%d\n",
			BATT_SOC_RESTART(chip), rc);
		goto out;
	}
out:
	chip->fg_restarting = false;
	return rc;
}

static void fg_notify_charger(struct fg_chip *chip)
{
	union power_supply_propval prop = {0, };
	int rc;

	if (!is_charger_available(chip)) {
		pr_warn("Charger not available yet?\n");
		return;
	}

	prop.intval = chip->bp.float_volt_uv;
	rc = power_supply_set_property(chip->batt_psy,
			POWER_SUPPLY_PROP_VOLTAGE_MAX, &prop);
	if (rc < 0) {
		pr_err("Error in setting voltage_max property on batt_psy, rc=%d\n",
			rc);
		return;
	}

	prop.intval = chip->bp.fastchg_curr_ma * 1000;
	rc = power_supply_set_property(chip->batt_psy,
			POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, &prop);
	if (rc < 0) {
		pr_err("Error in setting constant_charge_current_max property on batt_psy, rc=%d\n",
			rc);
		return;
	}

	fg_dbg(chip, FG_STATUS, "Notified charger on float voltage and FCC\n");
}

static void profile_load_work(struct work_struct *work)
{
	struct fg_chip *chip = container_of(work,
				struct fg_chip,
				profile_load_work.work);
	u8 buf[2], val;
	int rc;

	vote(chip->awake_votable, PROFILE_LOAD, true, 0);
	if (!is_profile_load_required(chip))
		goto done;

	clear_cycle_counter(chip);
	mutex_lock(&chip->cl.lock);
	chip->cl.learned_cc_uah = 0;
	chip->cl.active = false;
	mutex_unlock(&chip->cl.lock);

	fg_dbg(chip, FG_STATUS, "profile loading started\n");
	rc = fg_masked_write(chip, BATT_SOC_RESTART(chip), RESTART_GO_BIT, 0);
	if (rc < 0) {
		pr_err("Error in writing to %04x, rc=%d\n",
			BATT_SOC_RESTART(chip), rc);
		goto out;
	}

	/* load battery profile */
	rc = fg_sram_write(chip, PROFILE_LOAD_WORD, PROFILE_LOAD_OFFSET,
			chip->batt_profile, PROFILE_LEN, FG_IMA_ATOMIC);
	if (rc < 0) {
		pr_err("Error in writing battery profile, rc:%d\n", rc);
		goto out;
	}

	rc = __fg_restart(chip);
	if (rc < 0) {
		pr_err("Error in restarting FG, rc=%d\n", rc);
		goto out;
	}

	fg_dbg(chip, FG_STATUS, "SOC is ready\n");

	/* Set the profile integrity bit */
	val = 0x1;
	rc = fg_sram_write(chip, PROFILE_INTEGRITY_WORD,
			PROFILE_INTEGRITY_OFFSET, &val, 1, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("failed to write profile integrity rc=%d\n", rc);
		goto out;
	}

done:
	rc = fg_sram_read(chip, NOM_CAP_WORD, NOM_CAP_OFFSET, buf, 2,
			FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in reading %04x[%d] rc=%d\n", NOM_CAP_WORD,
			NOM_CAP_OFFSET, rc);
	} else {
		chip->cl.nom_cap_uah = (int)(buf[0] | buf[1] << 8) * 1000;
		rc = fg_load_learned_cap_from_sram(chip);
		if (rc < 0)
			pr_err("Error in loading capacity learning data, rc:%d\n",
				rc);
	}

	fg_notify_charger(chip);
	chip->profile_loaded = true;
	fg_dbg(chip, FG_STATUS, "profile loaded successfully");
out:
	vote(chip->awake_votable, PROFILE_LOAD, false, 0);
}

static int fg_restart_sysfs(const char *val, const struct kernel_param *kp)
{
	int rc;
	struct power_supply *bms_psy;
	struct fg_chip *chip;

	rc = param_set_int(val, kp);
	if (rc) {
		pr_err("Unable to set fg_restart: %d\n", rc);
		return rc;
	}

	if (fg_restart != 1) {
		pr_err("Bad value %d\n", fg_restart);
		return -EINVAL;
	}

	bms_psy = power_supply_get_by_name("bms");
	if (!bms_psy) {
		pr_err("bms psy not found\n");
		return 0;
	}

	chip = power_supply_get_drvdata(bms_psy);
	rc = __fg_restart(chip);
	if (rc < 0) {
		pr_err("Error in restarting FG, rc=%d\n", rc);
		return rc;
	}

	pr_info("FG restart done\n");
	return rc;
}

static struct kernel_param_ops fg_restart_ops = {
	.set = fg_restart_sysfs,
	.get = param_get_int,
};

module_param_cb(restart, &fg_restart_ops, &fg_restart, 0644);

/* PSY CALLBACKS STAY HERE */

static int fg_psy_get_property(struct power_supply *psy,
				       enum power_supply_property psp,
				       union power_supply_propval *pval)
{
	struct fg_chip *chip = power_supply_get_drvdata(psy);
	int rc = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_CAPACITY:
		if (chip->fg_restarting)
			pval->intval = chip->last_soc;
		else
			rc = fg_get_prop_capacity(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		rc = fg_get_battery_voltage(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		rc = fg_get_battery_current(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_TEMP:
		rc = fg_get_battery_temp(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_RESISTANCE:
		rc = fg_get_battery_resistance(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
		rc = fg_get_sram_prop(chip, FG_SRAM_OCV, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		pval->intval = chip->cl.nom_cap_uah;
		break;
	case POWER_SUPPLY_PROP_RESISTANCE_ID:
		rc = fg_get_batt_id(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_BATTERY_TYPE:
		pval->strval = fg_get_battery_type(chip);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		pval->intval = chip->bp.float_volt_uv;
		break;
	case POWER_SUPPLY_PROP_CYCLE_COUNT:
		pval->intval = fg_get_cycle_count(chip);
		break;
	case POWER_SUPPLY_PROP_CYCLE_COUNT_ID:
		pval->intval = chip->cyc_ctr.id;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW_RAW:
		rc = fg_get_cc_soc(chip, &pval->intval);
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		pval->intval = chip->cl.init_cc_uah;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
		pval->intval = chip->cl.learned_cc_uah;
		break;
	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
		rc = fg_get_cc_soc_sw(chip, &pval->intval);
		break;
	default:
		break;
	}

	return rc;
}

static int fg_psy_set_property(struct power_supply *psy,
				  enum power_supply_property psp,
				  const union power_supply_propval *pval)
{
	struct fg_chip *chip = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_CYCLE_COUNT_ID:
		if ((pval->intval > 0) && (pval->intval <= BUCKET_COUNT)) {
			chip->cyc_ctr.id = pval->intval;
		} else {
			pr_err("rejecting invalid cycle_count_id = %d\n",
				pval->intval);
			return -EINVAL;
		}
		break;
	default:
		break;
	}

	return 0;
}

static int fg_property_is_writeable(struct power_supply *psy,
						enum power_supply_property psp)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_CYCLE_COUNT_ID:
		return 1;
	default:
		break;
	}

	return 0;
}

static void fg_external_power_changed(struct power_supply *psy)
{
	pr_debug("power supply changed\n");
}

static int fg_notifier_cb(struct notifier_block *nb,
		unsigned long event, void *data)
{
	struct power_supply *psy = data;
	struct fg_chip *chip = container_of(nb, struct fg_chip, nb);

	if (event != PSY_EVENT_PROP_CHANGED)
		return NOTIFY_OK;

	if ((strcmp(psy->desc->name, "battery") == 0)
		|| (strcmp(psy->desc->name, "usb") == 0)) {
		/*
		 * We cannot vote for awake votable here as that takes
		 * a mutex lock and this is executed in an atomic context.
		 */
		pm_stay_awake(chip->dev);
		schedule_work(&chip->status_change_work);
	}

	return NOTIFY_OK;
}

static enum power_supply_property fg_psy_props[] = {
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_OCV,
	POWER_SUPPLY_PROP_CURRENT_NOW,
	POWER_SUPPLY_PROP_RESISTANCE_ID,
	POWER_SUPPLY_PROP_RESISTANCE,
	POWER_SUPPLY_PROP_BATTERY_TYPE,
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_CYCLE_COUNT,
	POWER_SUPPLY_PROP_CYCLE_COUNT_ID,
	POWER_SUPPLY_PROP_CHARGE_NOW_RAW,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_COUNTER,
};

static const struct power_supply_desc fg_psy_desc = {
	.name = "bms",
	.type = POWER_SUPPLY_TYPE_BMS,
	.properties = fg_psy_props,
	.num_properties = ARRAY_SIZE(fg_psy_props),
	.get_property = fg_psy_get_property,
	.set_property = fg_psy_set_property,
	.external_power_changed = fg_external_power_changed,
	.property_is_writeable = fg_property_is_writeable,
};

/* INIT FUNCTIONS STAY HERE */

static int fg_hw_init(struct fg_chip *chip)
{
	int rc;
	u8 buf[4], val;

	fg_encode(chip->sp, FG_SRAM_CUTOFF_VOLT, chip->dt.cutoff_volt_mv, buf);
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_CUTOFF_VOLT].addr_word,
			chip->sp[FG_SRAM_CUTOFF_VOLT].addr_byte, buf,
			chip->sp[FG_SRAM_CUTOFF_VOLT].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing cutoff_volt, rc=%d\n", rc);
		return rc;
	}

	fg_encode(chip->sp, FG_SRAM_EMPTY_VOLT, chip->dt.empty_volt_mv, buf);
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_EMPTY_VOLT].addr_word,
			chip->sp[FG_SRAM_EMPTY_VOLT].addr_byte, buf,
			chip->sp[FG_SRAM_EMPTY_VOLT].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing empty_volt, rc=%d\n", rc);
		return rc;
	}

	/* This SRAM register is only present in v2.0 */
	if (chip->pmic_rev_id->rev4 == PMICOBALT_V2P0_REV4 &&
		chip->bp.float_volt_uv > 0) {
		fg_encode(chip->sp, FG_SRAM_FLOAT_VOLT,
			chip->bp.float_volt_uv / 1000, buf);
		rc = fg_sram_write(chip, chip->sp[FG_SRAM_FLOAT_VOLT].addr_word,
			chip->sp[FG_SRAM_FLOAT_VOLT].addr_byte, buf,
			chip->sp[FG_SRAM_FLOAT_VOLT].len, FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in writing float_volt, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->bp.vbatt_full_mv > 0) {
		fg_encode(chip->sp, FG_SRAM_VBATT_FULL, chip->bp.vbatt_full_mv,
			buf);
		rc = fg_sram_write(chip, chip->sp[FG_SRAM_VBATT_FULL].addr_word,
			chip->sp[FG_SRAM_VBATT_FULL].addr_byte, buf,
			chip->sp[FG_SRAM_VBATT_FULL].len, FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in writing vbatt_full, rc=%d\n", rc);
			return rc;
		}
	}

	fg_encode(chip->sp, FG_SRAM_CHG_TERM_CURR, chip->dt.chg_term_curr_ma,
		buf);
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_CHG_TERM_CURR].addr_word,
			chip->sp[FG_SRAM_CHG_TERM_CURR].addr_byte, buf,
			chip->sp[FG_SRAM_CHG_TERM_CURR].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing chg_term_curr, rc=%d\n", rc);
		return rc;
	}

	fg_encode(chip->sp, FG_SRAM_SYS_TERM_CURR, chip->dt.sys_term_curr_ma,
		buf);
	rc = fg_sram_write(chip, chip->sp[FG_SRAM_SYS_TERM_CURR].addr_word,
			chip->sp[FG_SRAM_SYS_TERM_CURR].addr_byte, buf,
			chip->sp[FG_SRAM_SYS_TERM_CURR].len, FG_IMA_DEFAULT);
	if (rc < 0) {
		pr_err("Error in writing sys_term_curr, rc=%d\n", rc);
		return rc;
	}

	if (chip->dt.vbatt_low_thr_mv > 0) {
		fg_encode(chip->sp, FG_SRAM_VBATT_LOW,
			chip->dt.vbatt_low_thr_mv, buf);
		rc = fg_sram_write(chip, chip->sp[FG_SRAM_VBATT_LOW].addr_word,
				chip->sp[FG_SRAM_VBATT_LOW].addr_byte, buf,
				chip->sp[FG_SRAM_VBATT_LOW].len,
				FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in writing vbatt_low_thr, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->dt.delta_soc_thr > 0 && chip->dt.delta_soc_thr < 100) {
		fg_encode(chip->sp, FG_SRAM_DELTA_SOC_THR,
			chip->dt.delta_soc_thr, buf);
		rc = fg_sram_write(chip,
				chip->sp[FG_SRAM_DELTA_SOC_THR].addr_word,
				chip->sp[FG_SRAM_DELTA_SOC_THR].addr_byte,
				buf, chip->sp[FG_SRAM_DELTA_SOC_THR].len,
				FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in writing delta_soc_thr, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->dt.recharge_soc_thr > 0 && chip->dt.recharge_soc_thr < 100) {
		rc = fg_set_recharge_soc(chip, chip->dt.recharge_soc_thr);
		if (rc < 0) {
			pr_err("Error in setting recharge_soc, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->dt.rsense_sel >= SRC_SEL_BATFET &&
			chip->dt.rsense_sel < SRC_SEL_RESERVED) {
		rc = fg_masked_write(chip, BATT_INFO_IBATT_SENSING_CFG(chip),
				SOURCE_SELECT_MASK, chip->dt.rsense_sel);
		if (rc < 0) {
			pr_err("Error in writing rsense_sel, rc=%d\n", rc);
			return rc;
		}
	}

	get_temp_setpoint(chip->dt.jeita_thresholds[JEITA_COLD], &val);
	rc = fg_write(chip, BATT_INFO_JEITA_TOO_COLD(chip), &val, 1);
	if (rc < 0) {
		pr_err("Error in writing jeita_cold, rc=%d\n", rc);
		return rc;
	}

	get_temp_setpoint(chip->dt.jeita_thresholds[JEITA_COOL], &val);
	rc = fg_write(chip, BATT_INFO_JEITA_COLD(chip), &val, 1);
	if (rc < 0) {
		pr_err("Error in writing jeita_cool, rc=%d\n", rc);
		return rc;
	}

	get_temp_setpoint(chip->dt.jeita_thresholds[JEITA_WARM], &val);
	rc = fg_write(chip, BATT_INFO_JEITA_HOT(chip), &val, 1);
	if (rc < 0) {
		pr_err("Error in writing jeita_warm, rc=%d\n", rc);
		return rc;
	}

	get_temp_setpoint(chip->dt.jeita_thresholds[JEITA_HOT], &val);
	rc = fg_write(chip, BATT_INFO_JEITA_TOO_HOT(chip), &val, 1);
	if (rc < 0) {
		pr_err("Error in writing jeita_hot, rc=%d\n", rc);
		return rc;
	}

	if (chip->dt.esr_timer_charging > 0) {
		rc = fg_set_esr_timer(chip, chip->dt.esr_timer_charging, true,
				      FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in setting ESR timer, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->dt.esr_timer_awake > 0) {
		rc = fg_set_esr_timer(chip, chip->dt.esr_timer_awake, false,
				      FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in setting ESR timer, rc=%d\n", rc);
			return rc;
		}
	}

	if (chip->cyc_ctr.en)
		restore_cycle_counter(chip);

	if (chip->dt.jeita_hyst_temp >= 0) {
		val = chip->dt.jeita_hyst_temp << JEITA_TEMP_HYST_SHIFT;
		rc = fg_masked_write(chip, BATT_INFO_BATT_TEMP_CFG(chip),
			JEITA_TEMP_HYST_MASK, val);
		if (rc < 0) {
			pr_err("Error in writing batt_temp_cfg, rc=%d\n", rc);
			return rc;
		}
	}

	get_batt_temp_delta(chip->dt.batt_temp_delta, &val);
	rc = fg_masked_write(chip, BATT_INFO_BATT_TMPR_INTR(chip),
			CHANGE_THOLD_MASK, val);
	if (rc < 0) {
		pr_err("Error in writing batt_temp_delta, rc=%d\n", rc);
		return rc;
	}

	return 0;
}

static int fg_memif_init(struct fg_chip *chip)
{
	return fg_ima_init(chip);
}

/* INTERRUPT HANDLERS STAY HERE */

static irqreturn_t fg_vbatt_low_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	return IRQ_HANDLED;
}

static irqreturn_t fg_batt_missing_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;
	u8 status;
	int rc;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	rc = fg_read(chip, BATT_INFO_INT_RT_STS(chip), &status, 1);
	if (rc < 0) {
		pr_err("failed to read addr=0x%04x, rc=%d\n",
			BATT_INFO_INT_RT_STS(chip), rc);
		return IRQ_HANDLED;
	}

	chip->battery_missing = (status & BT_MISS_BIT);

	if (chip->battery_missing) {
		chip->profile_available = false;
		chip->profile_loaded = false;
		clear_cycle_counter(chip);
	} else {
		rc = fg_get_batt_profile(chip);
		if (rc < 0) {
			pr_err("Error in getting battery profile, rc:%d\n", rc);
			return IRQ_HANDLED;
		}
		schedule_delayed_work(&chip->profile_load_work, 0);
	}

	return IRQ_HANDLED;
}

static irqreturn_t fg_delta_batt_temp_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;
	union power_supply_propval prop = {0, };
	int rc, batt_temp;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	rc = fg_get_battery_temp(chip, &batt_temp);
	if (rc < 0) {
		pr_err("Error in getting batt_temp\n");
		return IRQ_HANDLED;
	}

	if (!is_charger_available(chip)) {
		chip->last_batt_temp = batt_temp;
		return IRQ_HANDLED;
	}

	power_supply_get_property(chip->batt_psy, POWER_SUPPLY_PROP_HEALTH,
		&prop);
	chip->health = prop.intval;

	if (chip->last_batt_temp != batt_temp) {
		chip->last_batt_temp = batt_temp;
		power_supply_changed(chip->batt_psy);
	}

	if (abs(chip->last_batt_temp - batt_temp) > 30)
		pr_warn("Battery temperature last:%d current: %d\n",
			chip->last_batt_temp, batt_temp);
	return IRQ_HANDLED;
}

static irqreturn_t fg_first_est_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	complete_all(&chip->soc_ready);
	return IRQ_HANDLED;
}

static irqreturn_t fg_soc_update_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	complete_all(&chip->soc_update);
	return IRQ_HANDLED;
}

static irqreturn_t fg_delta_soc_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;
	int rc;

	if (chip->cyc_ctr.en)
		schedule_work(&chip->cycle_count_work);

	if (is_charger_available(chip))
		power_supply_changed(chip->batt_psy);

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);

	if (chip->cl.active)
		fg_cap_learning_update(chip);

	rc = fg_charge_full_update(chip);
	if (rc < 0)
		pr_err("Error in charge_full_update, rc=%d\n", rc);

	rc = fg_adjust_ki_coeff_dischg(chip);
	if (rc < 0)
		pr_err("Error in adjusting ki_coeff_dischg, rc=%d\n", rc);

	return IRQ_HANDLED;
}

static irqreturn_t fg_empty_soc_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	if (is_charger_available(chip))
		power_supply_changed(chip->batt_psy);

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	return IRQ_HANDLED;
}

static irqreturn_t fg_soc_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	return IRQ_HANDLED;
}

static irqreturn_t fg_dummy_irq_handler(int irq, void *data)
{
	struct fg_chip *chip = data;

	fg_dbg(chip, FG_IRQ, "irq %d triggered\n", irq);
	return IRQ_HANDLED;
}

static struct fg_irq_info fg_irqs[FG_IRQ_MAX] = {
	/* BATT_SOC irqs */
	[MSOC_FULL_IRQ] = {
		.name		= "msoc-full",
		.handler	= fg_soc_irq_handler,
	},
	[MSOC_HIGH_IRQ] = {
		.name		= "msoc-high",
		.handler	= fg_soc_irq_handler,
		.wakeable	= true,
	},
	[MSOC_EMPTY_IRQ] = {
		.name		= "msoc-empty",
		.handler	= fg_empty_soc_irq_handler,
		.wakeable	= true,
	},
	[MSOC_LOW_IRQ] = {
		.name		= "msoc-low",
		.handler	= fg_soc_irq_handler,
		.wakeable	= true,
	},
	[MSOC_DELTA_IRQ] = {
		.name		= "msoc-delta",
		.handler	= fg_delta_soc_irq_handler,
		.wakeable	= true,
	},
	[BSOC_DELTA_IRQ] = {
		.name		= "bsoc-delta",
		.handler	= fg_dummy_irq_handler,
	},
	[SOC_READY_IRQ] = {
		.name		= "soc-ready",
		.handler	= fg_first_est_irq_handler,
		.wakeable	= true,
	},
	[SOC_UPDATE_IRQ] = {
		.name		= "soc-update",
		.handler	= fg_soc_update_irq_handler,
	},
	/* BATT_INFO irqs */
	[BATT_TEMP_DELTA_IRQ] = {
		.name		= "batt-temp-delta",
		.handler	= fg_delta_batt_temp_irq_handler,
		.wakeable	= true,
	},
	[BATT_MISSING_IRQ] = {
		.name		= "batt-missing",
		.handler	= fg_batt_missing_irq_handler,
		.wakeable	= true,
	},
	[ESR_DELTA_IRQ] = {
		.name		= "esr-delta",
		.handler	= fg_dummy_irq_handler,
	},
	[VBATT_LOW_IRQ] = {
		.name		= "vbatt-low",
		.handler	= fg_vbatt_low_irq_handler,
		.wakeable	= true,
	},
	[VBATT_PRED_DELTA_IRQ] = {
		.name		= "vbatt-pred-delta",
		.handler	= fg_dummy_irq_handler,
	},
	/* MEM_IF irqs */
	[DMA_GRANT_IRQ] = {
		.name		= "dma-grant",
		.handler	= fg_dummy_irq_handler,
	},
	[MEM_XCP_IRQ] = {
		.name		= "mem-xcp",
		.handler	= fg_dummy_irq_handler,
	},
	[IMA_RDY_IRQ] = {
		.name		= "ima-rdy",
		.handler	= fg_dummy_irq_handler,
	},
};

static int fg_get_irq_index_byname(const char *name)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(fg_irqs); i++) {
		if (strcmp(fg_irqs[i].name, name) == 0)
			return i;
	}

	pr_err("%s is not in irq list\n", name);
	return -ENOENT;
}

static int fg_register_interrupts(struct fg_chip *chip)
{
	struct device_node *child, *node = chip->dev->of_node;
	struct property *prop;
	const char *name;
	int rc, irq, irq_index;

	for_each_available_child_of_node(node, child) {
		of_property_for_each_string(child, "interrupt-names", prop,
						name) {
			irq = of_irq_get_byname(child, name);
			if (irq < 0) {
				dev_err(chip->dev, "failed to get irq %s irq:%d\n",
					name, irq);
				return irq;
			}

			irq_index = fg_get_irq_index_byname(name);
			if (irq_index < 0)
				return irq_index;

			rc = devm_request_threaded_irq(chip->dev, irq, NULL,
					fg_irqs[irq_index].handler,
					IRQF_ONESHOT, name, chip);
			if (rc < 0) {
				dev_err(chip->dev, "failed to register irq handler for %s rc:%d\n",
					name, rc);
				return rc;
			}

			fg_irqs[irq_index].irq = irq;
			if (fg_irqs[irq_index].wakeable)
				enable_irq_wake(fg_irqs[irq_index].irq);
		}
	}

	return 0;
}

static int fg_parse_ki_coefficients(struct fg_chip *chip)
{
	struct device_node *node = chip->dev->of_node;
	int rc, i;

	rc = of_property_count_elems_of_size(node, "qcom,ki-coeff-soc-dischg",
		sizeof(u32));
	if (rc != KI_COEFF_SOC_LEVELS)
		return 0;

	rc = of_property_read_u32_array(node, "qcom,ki-coeff-soc-dischg",
			chip->dt.ki_coeff_soc, KI_COEFF_SOC_LEVELS);
	if (rc < 0) {
		pr_err("Error in reading ki-coeff-soc-dischg, rc=%d\n",
			rc);
		return rc;
	}

	rc = of_property_count_elems_of_size(node, "qcom,ki-coeff-med-dischg",
		sizeof(u32));
	if (rc != KI_COEFF_SOC_LEVELS)
		return 0;

	rc = of_property_read_u32_array(node, "qcom,ki-coeff-med-dischg",
			chip->dt.ki_coeff_med_dischg, KI_COEFF_SOC_LEVELS);
	if (rc < 0) {
		pr_err("Error in reading ki-coeff-med-dischg, rc=%d\n",
			rc);
		return rc;
	}

	rc = of_property_count_elems_of_size(node, "qcom,ki-coeff-hi-dischg",
		sizeof(u32));
	if (rc != KI_COEFF_SOC_LEVELS)
		return 0;

	rc = of_property_read_u32_array(node, "qcom,ki-coeff-hi-dischg",
			chip->dt.ki_coeff_hi_dischg, KI_COEFF_SOC_LEVELS);
	if (rc < 0) {
		pr_err("Error in reading ki-coeff-hi-dischg, rc=%d\n",
			rc);
		return rc;
	}

	for (i = 0; i < KI_COEFF_SOC_LEVELS; i++) {
		if (chip->dt.ki_coeff_soc[i] < 0 ||
			chip->dt.ki_coeff_soc[i] > FULL_CAPACITY) {
			pr_err("Error in ki_coeff_soc_dischg values\n");
			return -EINVAL;
		}

		if (chip->dt.ki_coeff_med_dischg[i] < 0 ||
			chip->dt.ki_coeff_med_dischg[i] > KI_COEFF_MAX) {
			pr_err("Error in ki_coeff_med_dischg values\n");
			return -EINVAL;
		}

		if (chip->dt.ki_coeff_med_dischg[i] < 0 ||
			chip->dt.ki_coeff_med_dischg[i] > KI_COEFF_MAX) {
			pr_err("Error in ki_coeff_med_dischg values\n");
			return -EINVAL;
		}
	}
	chip->ki_coeff_dischg_en = true;
	return 0;
}

#define DEFAULT_CUTOFF_VOLT_MV		3200
#define DEFAULT_EMPTY_VOLT_MV		3100
#define DEFAULT_CHG_TERM_CURR_MA	100
#define DEFAULT_SYS_TERM_CURR_MA	-125
#define DEFAULT_DELTA_SOC_THR		1
#define DEFAULT_RECHARGE_SOC_THR	95
#define DEFAULT_BATT_TEMP_COLD		0
#define DEFAULT_BATT_TEMP_COOL		5
#define DEFAULT_BATT_TEMP_WARM		45
#define DEFAULT_BATT_TEMP_HOT		50
#define DEFAULT_CL_START_SOC		15
#define DEFAULT_CL_MIN_TEMP_DECIDEGC	150
#define DEFAULT_CL_MAX_TEMP_DECIDEGC	450
#define DEFAULT_CL_MAX_INC_DECIPERC	5
#define DEFAULT_CL_MAX_DEC_DECIPERC	100
#define DEFAULT_CL_MIN_LIM_DECIPERC	0
#define DEFAULT_CL_MAX_LIM_DECIPERC	0
#define BTEMP_DELTA_LOW			2
#define BTEMP_DELTA_HIGH		10
static int fg_parse_dt(struct fg_chip *chip)
{
	struct device_node *child, *revid_node, *node = chip->dev->of_node;
	u32 base, temp;
	u8 subtype;
	int rc;

	if (!node)  {
		dev_err(chip->dev, "device tree node missing\n");
		return -ENXIO;
	}

	revid_node = of_parse_phandle(node, "qcom,pmic-revid", 0);
	if (!revid_node) {
		pr_err("Missing qcom,pmic-revid property - driver failed\n");
		return -EINVAL;
	}

	chip->pmic_rev_id = get_revid_data(revid_node);
	if (IS_ERR_OR_NULL(chip->pmic_rev_id)) {
		pr_err("Unable to get pmic_revid rc=%ld\n",
			PTR_ERR(chip->pmic_rev_id));
		/*
		 * the revid peripheral must be registered, any failure
		 * here only indicates that the rev-id module has not
		 * probed yet.
		 */
		return -EPROBE_DEFER;
	}

	pr_debug("PMIC subtype %d Digital major %d\n",
		chip->pmic_rev_id->pmic_subtype, chip->pmic_rev_id->rev4);

	switch (chip->pmic_rev_id->pmic_subtype) {
	case PMICOBALT_SUBTYPE:
		if (chip->pmic_rev_id->rev4 < PMICOBALT_V2P0_REV4) {
			chip->sp = pmicobalt_v1_sram_params;
			chip->alg_flags = pmicobalt_v1_alg_flags;
		} else if (chip->pmic_rev_id->rev4 == PMICOBALT_V2P0_REV4) {
			chip->sp = pmicobalt_v2_sram_params;
			chip->alg_flags = pmicobalt_v2_alg_flags;
		} else {
			return -EINVAL;
		}
		break;
	default:
		return -EINVAL;
	}

	chip->batt_id_chan = iio_channel_get(chip->dev, "rradc_batt_id");
	if (IS_ERR(chip->batt_id_chan)) {
		if (PTR_ERR(chip->batt_id_chan) != -EPROBE_DEFER)
			pr_err("batt_id_chan unavailable %ld\n",
				PTR_ERR(chip->batt_id_chan));
		rc = PTR_ERR(chip->batt_id_chan);
		chip->batt_id_chan = NULL;
		return rc;
	}

	if (of_get_available_child_count(node) == 0) {
		dev_err(chip->dev, "No child nodes specified!\n");
		return -ENXIO;
	}

	for_each_available_child_of_node(node, child) {
		rc = of_property_read_u32(child, "reg", &base);
		if (rc < 0) {
			dev_err(chip->dev, "reg not specified in node %s, rc=%d\n",
				child->full_name, rc);
			return rc;
		}

		rc = fg_read(chip, base + PERPH_SUBTYPE_REG, &subtype, 1);
		if (rc < 0) {
			dev_err(chip->dev, "Couldn't read subtype for base %d, rc=%d\n",
				base, rc);
			return rc;
		}

		switch (subtype) {
		case FG_BATT_SOC_PMICOBALT:
			chip->batt_soc_base = base;
			break;
		case FG_BATT_INFO_PMICOBALT:
			chip->batt_info_base = base;
			break;
		case FG_MEM_INFO_PMICOBALT:
			chip->mem_if_base = base;
			break;
		default:
			dev_err(chip->dev, "Invalid peripheral subtype 0x%x\n",
				subtype);
			return -ENXIO;
		}
	}

	rc = fg_get_batt_profile(chip);
	if (rc < 0)
		pr_warn("profile for batt_id=%dKOhms not found..using OTP, rc:%d\n",
			chip->batt_id, rc);

	/* Read all the optional properties below */
	rc = of_property_read_u32(node, "qcom,fg-cutoff-voltage", &temp);
	if (rc < 0)
		chip->dt.cutoff_volt_mv = DEFAULT_CUTOFF_VOLT_MV;
	else
		chip->dt.cutoff_volt_mv = temp;

	rc = of_property_read_u32(node, "qcom,fg-empty-voltage", &temp);
	if (rc < 0)
		chip->dt.empty_volt_mv = DEFAULT_EMPTY_VOLT_MV;
	else
		chip->dt.empty_volt_mv = temp;

	rc = of_property_read_u32(node, "qcom,fg-vbatt-low-thr", &temp);
	if (rc < 0)
		chip->dt.vbatt_low_thr_mv = -EINVAL;
	else
		chip->dt.vbatt_low_thr_mv = temp;

	rc = of_property_read_u32(node, "qcom,fg-chg-term-current", &temp);
	if (rc < 0)
		chip->dt.chg_term_curr_ma = DEFAULT_CHG_TERM_CURR_MA;
	else
		chip->dt.chg_term_curr_ma = temp;

	rc = of_property_read_u32(node, "qcom,fg-sys-term-current", &temp);
	if (rc < 0)
		chip->dt.sys_term_curr_ma = DEFAULT_SYS_TERM_CURR_MA;
	else
		chip->dt.sys_term_curr_ma = temp;

	rc = of_property_read_u32(node, "qcom,fg-delta-soc-thr", &temp);
	if (rc < 0)
		chip->dt.delta_soc_thr = DEFAULT_DELTA_SOC_THR;
	else
		chip->dt.delta_soc_thr = temp;

	rc = of_property_read_u32(node, "qcom,fg-recharge-soc-thr", &temp);
	if (rc < 0)
		chip->dt.recharge_soc_thr = DEFAULT_RECHARGE_SOC_THR;
	else
		chip->dt.recharge_soc_thr = temp;

	rc = of_property_read_u32(node, "qcom,fg-rsense-sel", &temp);
	if (rc < 0)
		chip->dt.rsense_sel = SRC_SEL_BATFET_SMB;
	else
		chip->dt.rsense_sel = (u8)temp & SOURCE_SELECT_MASK;

	chip->dt.jeita_thresholds[JEITA_COLD] = DEFAULT_BATT_TEMP_COLD;
	chip->dt.jeita_thresholds[JEITA_COOL] = DEFAULT_BATT_TEMP_COOL;
	chip->dt.jeita_thresholds[JEITA_WARM] = DEFAULT_BATT_TEMP_WARM;
	chip->dt.jeita_thresholds[JEITA_HOT] = DEFAULT_BATT_TEMP_HOT;
	if (of_property_count_elems_of_size(node, "qcom,fg-jeita-thresholds",
		sizeof(u32)) == NUM_JEITA_LEVELS) {
		rc = of_property_read_u32_array(node,
				"qcom,fg-jeita-thresholds",
				chip->dt.jeita_thresholds, NUM_JEITA_LEVELS);
		if (rc < 0)
			pr_warn("Error reading Jeita thresholds, default values will be used rc:%d\n",
				rc);
	}

	rc = of_property_read_u32(node, "qcom,fg-esr-timer-charging", &temp);
	if (rc < 0)
		chip->dt.esr_timer_charging = -EINVAL;
	else
		chip->dt.esr_timer_charging = temp;

	rc = of_property_read_u32(node, "qcom,fg-esr-timer-awake", &temp);
	if (rc < 0)
		chip->dt.esr_timer_awake = -EINVAL;
	else
		chip->dt.esr_timer_awake = temp;

	rc = of_property_read_u32(node, "qcom,fg-esr-timer-asleep", &temp);
	if (rc < 0)
		chip->dt.esr_timer_asleep = -EINVAL;
	else
		chip->dt.esr_timer_asleep = temp;

	chip->cyc_ctr.en = of_property_read_bool(node, "qcom,cycle-counter-en");
	if (chip->cyc_ctr.en)
		chip->cyc_ctr.id = 1;

	chip->dt.force_load_profile = of_property_read_bool(node,
					"qcom,fg-force-load-profile");

	rc = of_property_read_u32(node, "qcom,cl-start-capacity", &temp);
	if (rc < 0)
		chip->dt.cl_start_soc = DEFAULT_CL_START_SOC;
	else
		chip->dt.cl_start_soc = temp;

	rc = of_property_read_u32(node, "qcom,cl-min-temp", &temp);
	if (rc < 0)
		chip->dt.cl_min_temp = DEFAULT_CL_MIN_TEMP_DECIDEGC;
	else
		chip->dt.cl_min_temp = temp;

	rc = of_property_read_u32(node, "qcom,cl-max-temp", &temp);
	if (rc < 0)
		chip->dt.cl_max_temp = DEFAULT_CL_MAX_TEMP_DECIDEGC;
	else
		chip->dt.cl_max_temp = temp;

	rc = of_property_read_u32(node, "qcom,cl-max-increment", &temp);
	if (rc < 0)
		chip->dt.cl_max_cap_inc = DEFAULT_CL_MAX_INC_DECIPERC;
	else
		chip->dt.cl_max_cap_inc = temp;

	rc = of_property_read_u32(node, "qcom,cl-max-decrement", &temp);
	if (rc < 0)
		chip->dt.cl_max_cap_dec = DEFAULT_CL_MAX_DEC_DECIPERC;
	else
		chip->dt.cl_max_cap_dec = temp;

	rc = of_property_read_u32(node, "qcom,cl-min-limit", &temp);
	if (rc < 0)
		chip->dt.cl_min_cap_limit = DEFAULT_CL_MIN_LIM_DECIPERC;
	else
		chip->dt.cl_min_cap_limit = temp;

	rc = of_property_read_u32(node, "qcom,cl-max-limit", &temp);
	if (rc < 0)
		chip->dt.cl_max_cap_limit = DEFAULT_CL_MAX_LIM_DECIPERC;
	else
		chip->dt.cl_max_cap_limit = temp;

	rc = of_property_read_u32(node, "qcom,fg-jeita-hyst-temp", &temp);
	if (rc < 0)
		chip->dt.jeita_hyst_temp = -EINVAL;
	else
		chip->dt.jeita_hyst_temp = temp;

	rc = of_property_read_u32(node, "qcom,fg-batt-temp-delta", &temp);
	if (rc < 0)
		chip->dt.batt_temp_delta = -EINVAL;
	else if (temp > BTEMP_DELTA_LOW && temp <= BTEMP_DELTA_HIGH)
		chip->dt.batt_temp_delta = temp;

	chip->dt.hold_soc_while_full = of_property_read_bool(node,
					"qcom,hold-soc-while-full");

	rc = fg_parse_ki_coefficients(chip);
	if (rc < 0)
		pr_err("Error in parsing Ki coefficients, rc=%d\n", rc);

	return 0;
}

static void fg_cleanup(struct fg_chip *chip)
{
	power_supply_unreg_notifier(&chip->nb);
	debugfs_remove_recursive(chip->dfs_root);
	if (chip->awake_votable)
		destroy_votable(chip->awake_votable);

	if (chip->batt_id_chan)
		iio_channel_release(chip->batt_id_chan);

	dev_set_drvdata(chip->dev, NULL);
}

static int fg_gen3_probe(struct platform_device *pdev)
{
	struct fg_chip *chip;
	struct power_supply_config fg_psy_cfg;
	int rc;

	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	chip->dev = &pdev->dev;
	chip->debug_mask = &fg_gen3_debug_mask;
	chip->irqs = fg_irqs;
	chip->regmap = dev_get_regmap(chip->dev->parent, NULL);
	if (!chip->regmap) {
		dev_err(chip->dev, "Parent regmap is unavailable\n");
		return -ENXIO;
	}

	rc = fg_parse_dt(chip);
	if (rc < 0) {
		dev_err(chip->dev, "Error in reading DT parameters, rc:%d\n",
			rc);
		return rc;
	}

	chip->awake_votable = create_votable("FG_WS", VOTE_SET_ANY, fg_awake_cb,
					chip);
	if (IS_ERR(chip->awake_votable)) {
		rc = PTR_ERR(chip->awake_votable);
		return rc;
	}

	mutex_init(&chip->bus_lock);
	mutex_init(&chip->sram_rw_lock);
	mutex_init(&chip->cyc_ctr.lock);
	mutex_init(&chip->cl.lock);
	init_completion(&chip->soc_update);
	init_completion(&chip->soc_ready);
	INIT_DELAYED_WORK(&chip->profile_load_work, profile_load_work);
	INIT_WORK(&chip->status_change_work, status_change_work);
	INIT_WORK(&chip->cycle_count_work, cycle_count_work);

	rc = fg_memif_init(chip);
	if (rc < 0) {
		dev_err(chip->dev, "Error in initializing FG_MEMIF, rc:%d\n",
			rc);
		goto exit;
	}

	rc = fg_hw_init(chip);
	if (rc < 0) {
		dev_err(chip->dev, "Error in initializing FG hardware, rc:%d\n",
			rc);
		goto exit;
	}

	platform_set_drvdata(pdev, chip);

	/* Register the power supply */
	fg_psy_cfg.drv_data = chip;
	fg_psy_cfg.of_node = NULL;
	fg_psy_cfg.supplied_to = NULL;
	fg_psy_cfg.num_supplicants = 0;
	chip->fg_psy = devm_power_supply_register(chip->dev, &fg_psy_desc,
			&fg_psy_cfg);
	if (IS_ERR(chip->fg_psy)) {
		pr_err("failed to register fg_psy rc = %ld\n",
				PTR_ERR(chip->fg_psy));
		goto exit;
	}

	chip->nb.notifier_call = fg_notifier_cb;
	rc = power_supply_reg_notifier(&chip->nb);
	if (rc < 0) {
		pr_err("Couldn't register psy notifier rc = %d\n", rc);
		goto exit;
	}

	rc = fg_register_interrupts(chip);
	if (rc < 0) {
		dev_err(chip->dev, "Error in registering interrupts, rc:%d\n",
			rc);
		goto exit;
	}

	/* Keep SOC_UPDATE irq disabled until we require it */
	if (fg_irqs[SOC_UPDATE_IRQ].irq)
		disable_irq_nosync(fg_irqs[SOC_UPDATE_IRQ].irq);

	rc = fg_debugfs_create(chip);
	if (rc < 0) {
		dev_err(chip->dev, "Error in creating debugfs entries, rc:%d\n",
			rc);
		goto exit;
	}

	if (chip->profile_available)
		schedule_delayed_work(&chip->profile_load_work, 0);

	device_init_wakeup(chip->dev, true);
	pr_debug("FG GEN3 driver successfully probed\n");
	return 0;
exit:
	fg_cleanup(chip);
	return rc;
}

static int fg_gen3_suspend(struct device *dev)
{
	struct fg_chip *chip = dev_get_drvdata(dev);
	int rc;

	if (chip->dt.esr_timer_awake > 0 && chip->dt.esr_timer_asleep > 0) {
		rc = fg_set_esr_timer(chip, chip->dt.esr_timer_asleep, false,
				      FG_IMA_NO_WLOCK);
		if (rc < 0) {
			pr_err("Error in setting ESR timer during suspend, rc=%d\n",
			       rc);
			return rc;
		}
	}

	return 0;
}

static int fg_gen3_resume(struct device *dev)
{
	struct fg_chip *chip = dev_get_drvdata(dev);
	int rc;

	if (chip->dt.esr_timer_awake > 0 && chip->dt.esr_timer_asleep > 0) {
		rc = fg_set_esr_timer(chip, chip->dt.esr_timer_awake, false,
				      FG_IMA_DEFAULT);
		if (rc < 0) {
			pr_err("Error in setting ESR timer during resume, rc=%d\n",
			       rc);
			return rc;
		}
	}

	return 0;
}

static const struct dev_pm_ops fg_gen3_pm_ops = {
	.suspend	= fg_gen3_suspend,
	.resume		= fg_gen3_resume,
};

static int fg_gen3_remove(struct platform_device *pdev)
{
	struct fg_chip *chip = dev_get_drvdata(&pdev->dev);

	fg_cleanup(chip);
	return 0;
}

static const struct of_device_id fg_gen3_match_table[] = {
	{.compatible = FG_GEN3_DEV_NAME},
	{},
};

static struct platform_driver fg_gen3_driver = {
	.driver = {
		.name = FG_GEN3_DEV_NAME,
		.owner = THIS_MODULE,
		.of_match_table = fg_gen3_match_table,
		.pm		= &fg_gen3_pm_ops,
	},
	.probe		= fg_gen3_probe,
	.remove		= fg_gen3_remove,
};

static int __init fg_gen3_init(void)
{
	return platform_driver_register(&fg_gen3_driver);
}

static void __exit fg_gen3_exit(void)
{
	return platform_driver_unregister(&fg_gen3_driver);
}

module_init(fg_gen3_init);
module_exit(fg_gen3_exit);

MODULE_DESCRIPTION("QPNP Fuel gauge GEN3 driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" FG_GEN3_DEV_NAME);