drivers/power/qcom-charger/qpnp-smb2.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.
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/power_supply.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include "smb-reg.h"
#include "smb-lib.h"
#include "pmic-voter.h"

#define SMB2_DEFAULT_FCC_UA 1000000
#define SMB2_DEFAULT_ICL_UA 1500000

static struct smb_params v1_params = {
	.fcc = {
		.name = "fast charge current",
		.reg = FAST_CHARGE_CURRENT_CFG_REG,
		.min_u = 0,
		.max_u = 4500000,
		.step_u = 25000,
	},
	.fv = {
		.name = "float voltage",
		.reg = FLOAT_VOLTAGE_CFG_REG,
		.min_u = 2500000,
		.max_u = 5000000,
		.step_u = 10000,
	},
	.usb_icl = {
		.name = "usb input current limit",
		.reg = USBIN_CURRENT_LIMIT_CFG_REG,
		.min_u = 0,
		.max_u = 6000000,
		.step_u = 25000,
	},
	.dc_icl = {
		.name = "dc input current limit",
		.reg = DCIN_CURRENT_LIMIT_CFG_REG,
		.min_u = 0,
		.max_u = 6000000,
		.step_u = 25000,
	},
};

struct smb_dt_props {
	bool suspend_input;
	int fcc_ua;
	int usb_icl_ua;
	int dc_icl_ua;
	int fv_uv;
};

struct smb2 {
	struct smb_charger chg;
	struct smb_dt_props dt;
	bool bad_part;
};

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

static int smb2_parse_dt(struct smb2 *chip)
{
	struct smb_charger *chg = &chip->chg;
	struct device_node *node = chg->dev->of_node;
	int rc;

	if (!node) {
		pr_err("device tree node missing\n");
		return -EINVAL;
	}

	chip->dt.suspend_input = of_property_read_bool(node,
				"qcom,suspend-input");

	rc = of_property_read_u32(node,
				"qcom,fcc-max-ua", &chip->dt.fcc_ua);
	if (rc < 0)
		chip->dt.fcc_ua = SMB2_DEFAULT_FCC_UA;

	rc = of_property_read_u32(node,
				"qcom,usb-icl-ua", &chip->dt.usb_icl_ua);
	if (rc < 0)
		chip->dt.usb_icl_ua = SMB2_DEFAULT_ICL_UA;

	rc = of_property_read_u32(node,
				"qcom,dc-icl-ua", &chip->dt.dc_icl_ua);
	if (rc < 0)
		chip->dt.dc_icl_ua = SMB2_DEFAULT_ICL_UA;

	return 0;
}

/************************
 * USB PSY REGISTRATION *
 ************************/

static enum power_supply_property smb2_usb_props[] = {
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_VOLTAGE_MIN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_MAX,
	POWER_SUPPLY_PROP_TYPE,
	POWER_SUPPLY_PROP_TYPEC_MODE,
	POWER_SUPPLY_PROP_TYPEC_POWER_ROLE,
	POWER_SUPPLY_PROP_TYPEC_CC_ORIENTATION,
	POWER_SUPPLY_PROP_PD_ALLOWED,
	POWER_SUPPLY_PROP_PD_ACTIVE,
};

static int smb2_usb_get_prop(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct smb2 *chip = power_supply_get_drvdata(psy);
	struct smb_charger *chg = &chip->chg;
	int rc = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_PRESENT:
		if (chip->bad_part)
			val->intval = 1;
		else
			rc = smblib_get_prop_usb_present(chg, val);
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		rc = smblib_get_prop_usb_online(chg, val);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
		val->intval = chg->voltage_min_uv;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
		val->intval = chg->voltage_max_uv;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		rc = smblib_get_prop_usb_voltage_now(chg, val);
		break;
	case POWER_SUPPLY_PROP_CURRENT_MAX:
		rc = smblib_get_prop_usb_current_max(chg, val);
		break;
	case POWER_SUPPLY_PROP_TYPE:
		if (chip->bad_part)
			val->intval = POWER_SUPPLY_TYPE_USB;
		else
			val->intval = chg->usb_psy_desc.type;
		break;
	case POWER_SUPPLY_PROP_TYPEC_MODE:
		if (chip->bad_part)
			val->intval = POWER_SUPPLY_TYPEC_SOURCE_DEFAULT;
		else
			rc = smblib_get_prop_typec_mode(chg, val);
		break;
	case POWER_SUPPLY_PROP_TYPEC_POWER_ROLE:
		rc = smblib_get_prop_typec_power_role(chg, val);
		break;
	case POWER_SUPPLY_PROP_TYPEC_CC_ORIENTATION:
		rc = smblib_get_prop_typec_cc_orientation(chg, val);
		break;
	case POWER_SUPPLY_PROP_PD_ALLOWED:
		rc = smblib_get_prop_pd_allowed(chg, val);
		break;
	case POWER_SUPPLY_PROP_PD_ACTIVE:
		val->intval = chg->pd_active;
		break;
	default:
		pr_err("get prop %d is not supported\n", psp);
		rc = -EINVAL;
		break;
	}
	return rc;
}

static int smb2_usb_set_prop(struct power_supply *psy,
		enum power_supply_property psp,
		const union power_supply_propval *val)
{
	struct smb2 *chip = power_supply_get_drvdata(psy);
	struct smb_charger *chg = &chip->chg;
	int rc = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
		rc = smblib_set_prop_usb_voltage_min(chg, val);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
		rc = smblib_set_prop_usb_voltage_max(chg, val);
		break;
	case POWER_SUPPLY_PROP_CURRENT_MAX:
		rc = smblib_set_prop_usb_current_max(chg, val);
		break;
	case POWER_SUPPLY_PROP_TYPE:
		if (chg->pd_active && val->intval == POWER_SUPPLY_TYPE_USB_PD) {
			chg->usb_psy_desc.type = val->intval;
		} else {
			pr_err("set type %d not allowed\n", val->intval);
			rc = -EINVAL;
		}
		break;
	case POWER_SUPPLY_PROP_TYPEC_POWER_ROLE:
		rc = smblib_set_prop_typec_power_role(chg, val);
		break;
	case POWER_SUPPLY_PROP_PD_ACTIVE:
		rc = smblib_set_prop_pd_active(chg, val);
		break;
	default:
		pr_err("set prop %d is not supported\n", psp);
		rc = -EINVAL;
		break;
	}

	return rc;
}

static int smb2_usb_prop_is_writeable(struct power_supply *psy,
		enum power_supply_property psp)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_TYPEC_POWER_ROLE:
		return 1;
	default:
		break;
	}

	return 0;
}

static int smb2_init_usb_psy(struct smb2 *chip)
{
	struct power_supply_config usb_cfg = {};
	struct smb_charger *chg = &chip->chg;

	chg->usb_psy_desc.name			= "usb";
	chg->usb_psy_desc.type			= POWER_SUPPLY_TYPE_UNKNOWN;
	chg->usb_psy_desc.properties		= smb2_usb_props;
	chg->usb_psy_desc.num_properties	= ARRAY_SIZE(smb2_usb_props);
	chg->usb_psy_desc.get_property		= smb2_usb_get_prop;
	chg->usb_psy_desc.set_property		= smb2_usb_set_prop;
	chg->usb_psy_desc.property_is_writeable	= smb2_usb_prop_is_writeable;

	usb_cfg.drv_data = chip;
	usb_cfg.of_node = chg->dev->of_node;
	chg->usb_psy = devm_power_supply_register(chg->dev,
						  &chg->usb_psy_desc,
						  &usb_cfg);
	if (IS_ERR(chg->usb_psy)) {
		pr_err("Couldn't register USB power supply\n");
		return PTR_ERR(chg->usb_psy);
	}

	return 0;
}

/*************************
 * BATT PSY REGISTRATION *
 *************************/

static enum power_supply_property smb2_batt_props[] = {
	POWER_SUPPLY_PROP_INPUT_SUSPEND,
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_CHARGE_TYPE,
	POWER_SUPPLY_PROP_CAPACITY,
};

static int smb2_batt_get_prop(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct smb_charger *chg = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		smblib_get_prop_batt_status(chg, val);
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		smblib_get_prop_batt_health(chg, val);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		smblib_get_prop_batt_present(chg, val);
		break;
	case POWER_SUPPLY_PROP_INPUT_SUSPEND:
		smblib_get_prop_input_suspend(chg, val);
		break;
	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		smblib_get_prop_batt_charge_type(chg, val);
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		smblib_get_prop_batt_capacity(chg, val);
		break;
	default:
		pr_err("batt power supply prop %d not supported\n",
			psp);
		return -EINVAL;
	}

	return 0;
}

static int smb2_batt_set_prop(struct power_supply *psy,
		enum power_supply_property prop,
		const union power_supply_propval *val)
{
	struct smb_charger *chg = power_supply_get_drvdata(psy);

	switch (prop) {
	case POWER_SUPPLY_PROP_INPUT_SUSPEND:
		smblib_set_prop_input_suspend(chg, val);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int smb2_batt_prop_is_writeable(struct power_supply *psy,
		enum power_supply_property psp)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_INPUT_SUSPEND:
		return 1;
	default:
		break;
	}

	return 0;
}

static const struct power_supply_desc batt_psy_desc = {
	.name = "battery",
	.type = POWER_SUPPLY_TYPE_BATTERY,
	.properties = smb2_batt_props,
	.num_properties = ARRAY_SIZE(smb2_batt_props),
	.get_property = smb2_batt_get_prop,
	.set_property = smb2_batt_set_prop,
	.property_is_writeable = smb2_batt_prop_is_writeable,
};

static int smb2_init_batt_psy(struct smb2 *chip)
{
	struct power_supply_config batt_cfg = {};
	struct smb_charger *chg = &chip->chg;
	int rc = 0;

	batt_cfg.drv_data = chg;
	batt_cfg.of_node = chg->dev->of_node;
	chg->batt_psy = devm_power_supply_register(chg->dev,
						   &batt_psy_desc,
						   &batt_cfg);
	if (IS_ERR(chg->batt_psy)) {
		pr_err("Couldn't register battery power supply\n");
		return PTR_ERR(chg->batt_psy);
	}

	return rc;
}

/******************************
 * VBUS REGULATOR REGISTRATION *
 ******************************/

struct regulator_ops smb2_vbus_reg_ops = {
	.enable = smblib_vbus_regulator_enable,
	.disable = smblib_vbus_regulator_disable,
	.is_enabled = smblib_vbus_regulator_is_enabled,
};

static int smb2_init_vbus_regulator(struct smb2 *chip)
{
	struct smb_charger *chg = &chip->chg;
	struct regulator_config cfg = {};
	int rc = 0;

	chg->vbus_vreg = devm_kzalloc(chg->dev, sizeof(*chg->vbus_vreg),
				      GFP_KERNEL);
	if (!chg->vbus_vreg)
		return -ENOMEM;

	cfg.dev = chg->dev;
	cfg.driver_data = chip;

	chg->vbus_vreg->rdesc.owner = THIS_MODULE;
	chg->vbus_vreg->rdesc.type = REGULATOR_VOLTAGE;
	chg->vbus_vreg->rdesc.ops = &smb2_vbus_reg_ops;
	chg->vbus_vreg->rdesc.of_match = "qcom,smb2-vbus";
	chg->vbus_vreg->rdesc.name = "qcom,smb2-vbus";

	chg->vbus_vreg->rdev = devm_regulator_register(chg->dev,
						&chg->vbus_vreg->rdesc, &cfg);
	if (IS_ERR(chg->vbus_vreg->rdev)) {
		rc = PTR_ERR(chg->vbus_vreg->rdev);
		chg->vbus_vreg->rdev = NULL;
		if (rc != -EPROBE_DEFER)
			pr_err("Couldn't register VBUS regualtor rc=%d\n", rc);
	}

	return rc;
}

/******************************
 * VCONN REGULATOR REGISTRATION *
 ******************************/

struct regulator_ops smb2_vconn_reg_ops = {
	.enable = smblib_vconn_regulator_enable,
	.disable = smblib_vconn_regulator_disable,
	.is_enabled = smblib_vconn_regulator_is_enabled,
};

static int smb2_init_vconn_regulator(struct smb2 *chip)
{
	struct smb_charger *chg = &chip->chg;
	struct regulator_config cfg = {};
	int rc = 0;

	chg->vconn_vreg = devm_kzalloc(chg->dev, sizeof(*chg->vconn_vreg),
				      GFP_KERNEL);
	if (!chg->vconn_vreg)
		return -ENOMEM;

	cfg.dev = chg->dev;
	cfg.driver_data = chip;

	chg->vconn_vreg->rdesc.owner = THIS_MODULE;
	chg->vconn_vreg->rdesc.type = REGULATOR_VOLTAGE;
	chg->vconn_vreg->rdesc.ops = &smb2_vconn_reg_ops;
	chg->vconn_vreg->rdesc.of_match = "qcom,smb2-vconn";
	chg->vconn_vreg->rdesc.name = "qcom,smb2-vconn";

	chg->vconn_vreg->rdev = devm_regulator_register(chg->dev,
						&chg->vconn_vreg->rdesc, &cfg);
	if (IS_ERR(chg->vconn_vreg->rdev)) {
		rc = PTR_ERR(chg->vconn_vreg->rdev);
		chg->vconn_vreg->rdev = NULL;
		if (rc != -EPROBE_DEFER)
			pr_err("Couldn't register VCONN regualtor rc=%d\n", rc);
	}

	return rc;
}

/***************************
 * HARDWARE INITIALIZATION *
 ***************************/

static int smb2_init_hw(struct smb2 *chip)
{
	struct smb_charger *chg = &chip->chg;
	int rc;

	/* votes must be cast before configuring software control */
	vote(chg->usb_suspend_votable,
		DEFAULT_VOTER, chip->dt.suspend_input, 0);
	vote(chg->dc_suspend_votable,
		DEFAULT_VOTER, chip->dt.suspend_input, 0);
	vote(chg->fcc_votable,
		DEFAULT_VOTER, true, chip->dt.fcc_ua);
	vote(chg->usb_icl_votable,
		DEFAULT_VOTER, true, chip->dt.usb_icl_ua);
	vote(chg->dc_icl_votable,
		DEFAULT_VOTER, true, chip->dt.dc_icl_ua);

	/* configure charge enable for software control; active high */
	rc = smblib_masked_write(chg, CHGR_CFG2_REG,
				 CHG_EN_POLARITY_BIT | CHG_EN_SRC_BIT, 0);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't configure charge enable source rc=%d\n", rc);
		return rc;
	}

	/* enable the charging path */
	rc = smblib_enable_charging(chg, true);
	if (rc < 0) {
		dev_err(chg->dev, "Couldn't enable charging rc=%d\n", rc);
		return rc;
	}

	/*
	 * trigger the usb-typec-change interrupt only when the CC state
	 * changes, or there was a VBUS error
	 */
	rc = smblib_write(chg, TYPE_C_INTRPT_ENB_REG,
			    TYPEC_CCSTATE_CHANGE_INT_EN_BIT
			  | TYPEC_VBUS_ERROR_INT_EN_BIT);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't configure Type-C interrupts rc=%d\n", rc);
		return rc;
	}

	/* configure VCONN for software control */
	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,
				 VCONN_EN_SRC_BIT | VCONN_EN_VALUE_BIT,
				 VCONN_EN_SRC_BIT);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't configure VCONN for SW control rc=%d\n", rc);
		return rc;
	}

	/* configure VBUS for software control */
	rc = smblib_masked_write(chg, OTG_CFG_REG, OTG_EN_SRC_CFG_BIT, 0);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't configure VBUS for SW control rc=%d\n", rc);
		return rc;
	}

	/* configure power role for dual-role */
	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,
				 TYPEC_POWER_ROLE_CMD_MASK, 0);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't configure power role for DRP rc=%d\n", rc);
		return rc;
	}

	/* disable Type-C factory mode */
	rc = smblib_masked_write(chg, TYPE_C_CFG_REG,
				 FACTORY_MODE_DETECTION_EN_BIT, 0);
	if (rc < 0) {
		dev_err(chg->dev,
			"Couldn't disable Type-C factory mode rc=%d\n", rc);
		return rc;
	}

	return rc;
}

/****************************
 * DETERMINE INITIAL STATUS *
 ****************************/

static int smb2_determine_initial_status(struct smb2 *chip)
{
	struct smb_irq_data irq_data = {chip, "determine-initial-status"};

	smblib_handle_usb_plugin(0, &irq_data);
	smblib_handle_usb_typec_change(0, &irq_data);
	smblib_handle_usb_source_change(0, &irq_data);

	return 0;
}

/**************************
 * INTERRUPT REGISTRATION *
 **************************/

struct smb2_irq_info {
	const char *name;
	const irq_handler_t handler;
};

static const struct smb2_irq_info smb2_irqs[] = {
/* CHARGER IRQs */
	{ "chg-error",                  smblib_handle_debug },
	{ "chg-state-change",           smblib_handle_debug },
	{ "step-chg-state-change",      smblib_handle_debug },
	{ "step-chg-soc-update-fail",   smblib_handle_debug },
	{ "step-chg-soc-update-request", smblib_handle_debug },
/* OTG IRQs */
	{ "otg-fail",                   smblib_handle_debug },
	{ "otg-overcurrent",            smblib_handle_debug },
	{ "otg-oc-dis-sw-sts",          smblib_handle_debug },
	{ "testmode-change-detect",     smblib_handle_debug },
/* BATTERY IRQs */
	{ "bat-temp",                   smblib_handle_batt_psy_changed },
	{ "bat-ocp",                    smblib_handle_batt_psy_changed },
	{ "bat-ov",                     smblib_handle_batt_psy_changed },
	{ "bat-low",                    smblib_handle_batt_psy_changed },
	{ "bat-therm-or-id-missing",    smblib_handle_batt_psy_changed },
	{ "bat-terminal-missing",       smblib_handle_batt_psy_changed },
/* USB INPUT IRQs */
	{ "usbin-collapse",             smblib_handle_debug },
	{ "usbin-lt-3p6v",              smblib_handle_debug },
	{ "usbin-uv",                   smblib_handle_debug },
	{ "usbin-ov",                   smblib_handle_debug },
	{ "usbin-plugin",               smblib_handle_usb_plugin },
	{ "usbin-src-change",           smblib_handle_usb_source_change },
	{ "usbin-icl-change",           smblib_handle_debug },
	{ "type-c-change",		smblib_handle_usb_typec_change },
/* DC INPUT IRQs */
	{ "dcin-collapse",              smblib_handle_debug },
	{ "dcin-lt-3p6v",               smblib_handle_debug },
	{ "dcin-uv",                    smblib_handle_debug },
	{ "dcin-ov",                    smblib_handle_debug },
	{ "dcin-plugin",                smblib_handle_debug },
	{ "div2-en-dg",                 smblib_handle_debug },
	{ "dcin-icl-change",            smblib_handle_debug },
/* MISCELLANEOUS IRQs */
	{ "wdog-snarl",                 smblib_handle_debug },
	{ "wdog-bark",                  smblib_handle_debug },
	{ "aicl-fail",                  smblib_handle_debug },
	{ "aicl-done",                  smblib_handle_debug },
	{ "high-duty-cycle",            smblib_handle_debug },
	{ "input-current-limiting",     smblib_handle_debug },
	{ "temperature-change",         smblib_handle_debug },
	{ "switcher-power-ok",          smblib_handle_debug },
};

static int smb2_get_irq_index_byname(const char *irq_name)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(smb2_irqs); i++) {
		if (strcmp(smb2_irqs[i].name, irq_name) == 0)
			return i;
	}

	return -ENOENT;
}

static int smb2_request_interrupt(struct smb2 *chip,
				struct device_node *node, const char *irq_name)
{
	struct smb_charger *chg = &chip->chg;
	int rc, irq, irq_index;
	struct smb_irq_data *irq_data;

	irq = of_irq_get_byname(node, irq_name);
	if (irq < 0) {
		pr_err("Couldn't get irq %s byname\n", irq_name);
		return irq;
	}

	irq_index = smb2_get_irq_index_byname(irq_name);
	if (irq_index < 0) {
		pr_err("%s is not a defined irq\n", irq_name);
		return irq_index;
	}

	irq_data = devm_kzalloc(chg->dev, sizeof(*irq_data), GFP_KERNEL);
	if (!irq_data)
		return -ENOMEM;

	irq_data->parent_data = chip;
	irq_data->name = irq_name;

	rc = devm_request_threaded_irq(chg->dev, irq, NULL,
					smb2_irqs[irq_index].handler,
					IRQF_ONESHOT, irq_name, irq_data);
	if (rc < 0) {
		pr_err("Couldn't request irq %d\n", irq);
		return rc;
	}

	return rc;
}

static int smb2_request_interrupts(struct smb2 *chip)
{
	struct smb_charger *chg = &chip->chg;
	struct device_node *node = chg->dev->of_node;
	struct device_node *child;
	int rc = 0;
	const char *name;
	struct property *prop;

	for_each_available_child_of_node(node, child) {
		of_property_for_each_string(child, "interrupt-names",
					    prop, name) {
			rc = smb2_request_interrupt(chip, child, name);
			if (rc < 0)
				return rc;
		}
	}

	return rc;
}

/*********
 * PROBE *
 *********/

static int smb2_probe(struct platform_device *pdev)
{
	struct smb2 *chip;
	struct smb_charger *chg;
	int rc = 0;
	u8 stat;

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

	chg = &chip->chg;
	chg->dev = &pdev->dev;
	chg->param = v1_params;
	chg->debug_mask = &__debug_mask;

	chg->regmap = dev_get_regmap(chg->dev->parent, NULL);
	if (!chg->regmap) {
		pr_err("parent regmap is missing\n");
		return -EINVAL;
	}

	smblib_init(chg);

	rc = smb2_parse_dt(chip);
	if (rc < 0) {
		pr_err("Couldn't parse device tree rc=%d\n", rc);
		goto cleanup;
	}

	/* set driver data before resources request it */
	platform_set_drvdata(pdev, chip);

	rc = smb2_init_vbus_regulator(chip);
	if (rc < 0) {
		pr_err("Couldn't initialize vbus regulator rc=%d\n",
			rc);
		goto cleanup;
	}

	rc = smb2_init_vconn_regulator(chip);
	if (rc < 0) {
		pr_err("Couldn't initialize vconn regulator rc=%d\n",
			rc);
		goto cleanup;
	}

	rc = smb2_init_usb_psy(chip);
	if (rc < 0) {
		pr_err("Couldn't initialize usb psy rc=%d\n", rc);
		goto cleanup;
	}

	rc = smblib_read(chg, SHDN_CMD_REG, &stat);
	if (rc < 0) {
		pr_err("Couldn't read MISC_SHDN_CMD_REG rc=%d\n", rc);
		return rc;
	}

	if (stat) {
		pr_err("bad charger part; faking USB insertion\n");
		chip->bad_part = true;
		power_supply_changed(chg->usb_psy);
		return 0;
	}

	rc = smb2_init_batt_psy(chip);
	if (rc < 0) {
		pr_err("Couldn't initialize batt psy rc=%d\n", rc);
		goto cleanup;
	}

	rc = smb2_init_hw(chip);
	if (rc < 0) {
		pr_err("Couldn't initialize hardware rc=%d\n", rc);
		goto cleanup;
	}

	rc = smb2_determine_initial_status(chip);
	if (rc < 0) {
		pr_err("Couldn't determine initial status rc=%d\n",
			rc);
		goto cleanup;
	}

	rc = smb2_request_interrupts(chip);
	if (rc < 0) {
		pr_err("Couldn't request interrupts rc=%d\n", rc);
		goto cleanup;
	}

	pr_info("QPNP SMB2 probed successfully\n");
	return rc;

cleanup:
	if (chg->usb_psy)
		power_supply_unregister(chg->usb_psy);
	if (chg->batt_psy)
		power_supply_unregister(chg->batt_psy);
	if (chg->vconn_vreg && chg->vconn_vreg->rdev)
		regulator_unregister(chg->vconn_vreg->rdev);
	if (chg->vbus_vreg && chg->vbus_vreg->rdev)
		regulator_unregister(chg->vbus_vreg->rdev);
	platform_set_drvdata(pdev, NULL);
	return rc;
}

static int smb2_remove(struct platform_device *pdev)
{
	struct smb2 *chip = platform_get_drvdata(pdev);
	struct smb_charger *chg = &chip->chg;

	power_supply_unregister(chg->batt_psy);
	power_supply_unregister(chg->usb_psy);
	regulator_unregister(chg->vconn_vreg->rdev);
	regulator_unregister(chg->vbus_vreg->rdev);

	platform_set_drvdata(pdev, NULL);
	return 0;
}

static const struct of_device_id match_table[] = {
	{ .compatible = "qcom,qpnp-smb2", },
	{ },
};

static struct platform_driver smb2_driver = {
	.driver		= {
		.name		= "qcom,qpnp-smb2",
		.owner		= THIS_MODULE,
		.of_match_table	= match_table,
	},
	.probe		= smb2_probe,
	.remove		= smb2_remove,
};
module_platform_driver(smb2_driver);

MODULE_DESCRIPTION("QPNP SMB2 Charger Driver");
MODULE_LICENSE("GPL v2");