@@ -405,6 +405,14 @@ config BATTERY_RT5033
The fuelgauge calculates and determines the battery state of charge
according to battery open circuit voltage.
+config CHARGER_RT5033
+ tristate "RT5033 battery charger support"
+ depends on MFD_RT5033
+ help
+ This adds support for battery charger in Richtek RT5033 PMIC.
+ The device supports pre-charge mode, fast charge mode and
+ constant voltage mode.
+
source "drivers/power/reset/Kconfig"
endif # POWER_SUPPLY
@@ -57,6 +57,7 @@ obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o
obj-$(CONFIG_POWER_AVS) += avs/
+obj-$(CONFIG_POWER_RT5033) += rt5033_charger.o
obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o
obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o
obj-$(CONFIG_POWER_RESET) += reset/
new file mode 100644
@@ -0,0 +1,485 @@
+/*
+ * Battery charger driver for RT5033
+ *
+ * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
+ * Author: Beomho Seo <beomho.seo@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published bythe Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/rt5033-private.h>
+#include <linux/mfd/rt5033.h>
+
+static int rt5033_get_charger_state(struct rt5033_charger *charger)
+{
+ struct regmap *regmap = charger->rt5033->regmap;
+ int state = POWER_SUPPLY_STATUS_UNKNOWN;
+ u32 reg_data;
+
+ if (!regmap)
+ return state;
+
+ regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data);
+
+ switch (reg_data & RT5033_CHG_STAT_MASK) {
+ case RT5033_CHG_STAT_DISCHARGING:
+ state = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case RT5033_CHG_STAT_CHARGING:
+ state = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case RT5033_CHG_STAT_FULL:
+ state = POWER_SUPPLY_STATUS_FULL;
+ break;
+ case RT5033_CHG_STAT_NOT_CHARGING:
+ state = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ }
+
+ return state;
+}
+
+static int rt5033_get_charger_type(struct rt5033_charger *charger)
+{
+ struct regmap *regmap = charger->rt5033->regmap;
+ int state = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ u32 reg_data;
+
+ regmap_read(regmap, RT5033_REG_CHG_STAT, ®_data);
+
+ switch (reg_data & RT5033_CHG_STAT_TYPE_MASK) {
+ case RT5033_CHG_STAT_TYPE_FAST:
+ state = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ break;
+ case RT5033_CHG_STAT_TYPE_PRE:
+ state = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ }
+
+ return state;
+}
+
+static int rt5033_get_charger_current(struct rt5033_charger *charger,
+ enum power_supply_property psp)
+{
+ struct regmap *regmap = charger->rt5033->regmap;
+ unsigned int state, reg_data, data;
+
+ if (psp == POWER_SUPPLY_PROP_CURRENT_MAX)
+ return RT5033_CHG_MAX_CURRENT;
+
+ regmap_read(regmap, RT5033_REG_CHG_CTRL5, ®_data);
+
+ state = (reg_data >> RT5033_CHGCTRL5_ICHG_SHIFT) & 0xf;
+
+ if (state > RT5033_CHG_MAX_CURRENT)
+ state = RT5033_CHG_MAX_CURRENT;
+
+ data = state * 100 + 700;
+
+ return data;
+}
+
+static int rt5033_get_charge_voltage(struct rt5033_charger *charger,
+ enum power_supply_property psp)
+{
+ struct regmap *regmap = charger->rt5033->regmap;
+ unsigned int state, reg_data, data;
+
+ if (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX)
+ return RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX;
+
+ regmap_read(regmap, RT5033_REG_CHG_CTRL2, ®_data);
+
+ state = reg_data >> 2;
+
+ data = RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN +
+ RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM * state;
+
+ if (data > RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX)
+ data = RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX;
+
+ return data;
+}
+
+static inline int rt5033_init_const_charge(struct rt5033_charger *psy)
+{
+ struct rt5033_charger_data *chg = psy->chg;
+ unsigned val;
+ int ret;
+ u8 reg_data;
+
+ /* Set Constant voltage mode */
+ if (chg->const_uvolt < RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN ||
+ chg->const_uvolt > RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX)
+ return -EINVAL;
+
+ if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN)
+ reg_data = 0x0;
+ else if (chg->const_uvolt == RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MAX)
+ reg_data = 0xfc;
+ else {
+ val = chg->const_uvolt;
+ val -= RT5033_CHARGER_CONST_VOLTAGE_LIMIT_MIN;
+ val /= RT5033_CHARGER_CONST_VOLTAGE_STEP_NUM;
+ reg_data = val;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL2,
+ RT5033_CHGCTRL2_CV_MASK, reg_data << 2);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ /* Set end of charge current */
+ if (chg->eoc_uamp < RT5033_CHARGER_EOC_MIN ||
+ chg->eoc_uamp > RT5033_CHARGER_EOC_MAX)
+ return -EINVAL;
+
+ if (chg->eoc_uamp == RT5033_CHARGER_EOC_MIN)
+ reg_data = 0x1;
+ else if (chg->eoc_uamp == RT5033_CHARGER_EOC_MAX)
+ reg_data = 0x7;
+ else {
+ val = chg->eoc_uamp;
+ if (val < RT5033_CHARGER_EOC_REF) {
+ val -= RT5033_CHARGER_EOC_MIN;
+ val /= RT5033_CHARGER_EOC_STEP_NUM1;
+ reg_data = 0x01 + val;
+ } else if (val > RT5033_CHARGER_EOC_REF) {
+ val -= RT5033_CHARGER_EOC_REF;
+ val /= RT5033_CHARGER_EOC_STEP_NUM2;
+ reg_data = 0x04 + val;
+ } else {
+ reg_data = 0x04;
+ }
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL4,
+ RT5033_CHGCTRL4_EOC_MASK, reg_data);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static inline int rt5033_init_fast_charge(struct rt5033_charger *psy)
+{
+ struct rt5033_charger_data *chg = psy->chg;
+ int ret;
+ u8 reg_data;
+
+ /* Set limit input current */
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL1,
+ RT5033_AICR_MODE_MASK, RT5033_AICR_2000_MODE);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ /* Set internal timer */
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL3,
+ RT5033_CHGCTRL3_TIMER_MASK | RT5033_CHGCTRL3_TIMER_EN_MASK,
+ RT5033_FAST_CHARGE_TIMER4 | RT5033_INT_TIMER_ENABLE);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ /* Set fast-charge mode Carging current */
+ if (chg->fast_uamp < RT5033_CHARGER_FAST_CURRENT_MIN ||
+ chg->fast_uamp > RT5033_CHARGER_FAST_CURRENT_MAX)
+ return -EINVAL;
+
+ if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MIN)
+ reg_data = 0x0;
+ else if (chg->fast_uamp == RT5033_CHARGER_FAST_CURRENT_MAX)
+ reg_data = 0xd0;
+ else {
+ unsigned int val = chg->fast_uamp;
+
+ val -= RT5033_CHARGER_FAST_CURRENT_MIN;
+ val /= RT5033_CHARGER_FAST_CURRENT_STEP_NUM;
+ reg_data = 0x10 + val;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL5,
+ RT5033_CHGCTRL5_ICHG_MASK, reg_data);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static inline int rt5033_init_pre_charge(struct rt5033_charger *psy)
+{
+ struct rt5033_charger_data *chg = psy->chg;
+ int ret;
+ u8 reg_data;
+
+ /* Set pre-charge threshold voltage */
+ if (chg->pre_uvolt < RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN ||
+ chg->pre_uvolt > RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX)
+ return -EINVAL;
+
+ if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN)
+ reg_data = 0x00;
+ else if (chg->pre_uvolt == RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MAX)
+ reg_data = 0x0f;
+ else {
+ unsigned int val = chg->pre_uvolt;
+
+ val -= RT5033_CHARGER_PRE_THRESHOLD_LIMIT_MIN;
+ val /= RT5033_CHARGER_PRE_THRESHOLD_STEP_NUM;
+ reg_data = 0x00 + val;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL5,
+ RT5033_CHGCTRL5_VPREC_MASK, reg_data);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ /* Set pre-charge mode charging current */
+ if (chg->pre_uamp < RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN ||
+ chg->pre_uamp > RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX)
+ return -EINVAL;
+
+ if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN)
+ reg_data = 0x00;
+ else if (chg->pre_uamp == RT5033_CHARGER_PRE_CURRENT_LIMIT_MAX)
+ reg_data = 0x18;
+ else {
+ unsigned int val = chg->pre_uamp;
+
+ val -= RT5033_CHARGER_PRE_CURRENT_LIMIT_MIN;
+ val /= RT5033_CHARGER_PRE_CURRENT_STEP_NUM;
+ reg_data = 0x08 + val;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL4,
+ RT5033_CHGCTRL4_IPREC_MASK, reg_data);
+ if (ret) {
+ dev_err(psy->dev, "Failed regmap update\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rt5033_charger_reg_init(struct rt5033_charger *psy)
+{
+ int ret = 0;
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL1,
+ RT5033_CHGCTRL1_MODE_MASK, RT5033_CHARGER_MODE);
+ if (ret) {
+ dev_err(psy->dev, "Failed to update charger mode.\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_RT_CTRL1,
+ RT5033_RT_CTRL1_UUG_MASK, RT5033_CHARGER_UUG_ENABLE);
+ if (ret) {
+ dev_err(psy->dev, "Failed to update rt ctrl register.\n");
+ return -EINVAL;
+ }
+
+ ret = rt5033_init_pre_charge(psy);
+ if (ret)
+ return ret;
+
+ ret = rt5033_init_fast_charge(psy);
+ if (ret)
+ return ret;
+
+ ret = rt5033_init_const_charge(psy);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL3,
+ RT5033_CHGCTRL3_CFO_EN_MASK, RT5033_CFO_ENABLE);
+ if (ret) {
+ dev_err(psy->dev, "Failed to set enable.\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(psy->rt5033->regmap, RT5033_REG_CHG_CTRL1,
+ RT5033_RT_HZ_MASK, RT5033_CHARGER_HZ_DISABLE);
+ if (ret) {
+ dev_err(psy->dev, "Failed to set high impedance mode.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property rt5033_charger_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static int rt5033_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rt5033_charger *charger = container_of(psy,
+ struct rt5033_charger, psy);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = rt5033_get_charger_state(charger);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = rt5033_get_charger_type(charger);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ val->intval = rt5033_get_charger_current(charger, psp);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = rt5033_get_charge_voltage(charger, psp);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = RT5033_CHARGER_MODEL;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = RT5033_MANUFACTURER;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static struct rt5033_charger_data *rt5033_charger_dt_init(
+ struct platform_device *pdev)
+{
+ struct rt5033_charger_data *chg;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ if (!np) {
+ dev_err(&pdev->dev, "No charger of_node\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
+ if (!chg)
+ return ERR_PTR(-ENOMEM);
+
+ ret = of_property_read_u32(np, "richtek,pre-uamp", &chg->pre_uamp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = of_property_read_u32(np, "richtek,pre-threshold-uvolt",
+ &chg->pre_uvolt);
+ if (ret)
+ return ERR_PTR(ret);
+
+ /*
+ * Charging current is decided by external sensing register and
+ * regulated voltage. In this driver, external sensing regster value
+ * is 10 mili ohm
+ */
+ ret = of_property_read_u32(np, "richtek,fast-uamp", &chg->fast_uamp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = of_property_read_u32(np, "richtek,const-uvolt",
+ &chg->const_uvolt);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = of_property_read_u32(np, "richtek,eoc-uamp", &chg->eoc_uamp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return chg;
+}
+
+static int rt5033_charger_probe(struct platform_device *pdev)
+{
+ struct rt5033_charger *charger;
+ struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
+ int ret;
+
+ charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
+ if (!charger)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, charger);
+ charger->dev = &pdev->dev;
+ charger->rt5033 = rt5033;
+
+ charger->chg = rt5033_charger_dt_init(pdev);
+ if (IS_ERR_OR_NULL(charger->chg))
+ return -ENODEV;
+
+ ret = rt5033_charger_reg_init(charger);
+ if (ret)
+ return ret;
+
+ charger->psy.name = "rt5033-charger",
+ charger->psy.type = POWER_SUPPLY_TYPE_BATTERY,
+ charger->psy.properties = rt5033_charger_props,
+ charger->psy.num_properties = ARRAY_SIZE(rt5033_charger_props),
+ charger->psy.get_property = rt5033_charger_get_property,
+
+ ret = power_supply_register(&pdev->dev, &charger->psy);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register power supply\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rt5033_charger_remove(struct platform_device *pdev)
+{
+ struct rt5033_charger *charger = platform_get_drvdata(pdev);
+
+ power_supply_unregister(&charger->psy);
+
+ return 0;
+}
+
+static const struct platform_device_id rt5033_charger_id[] = {
+ { "rt5033-charger", },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, rt5033_charger_id);
+
+static struct platform_driver rt5033_charger_driver = {
+ .driver = {
+ .name = "rt5033-charger",
+ },
+ .probe = rt5033_charger_probe,
+ .remove = rt5033_charger_remove,
+ .id_table = rt5033_charger_id,
+};
+module_platform_driver(rt5033_charger_driver);
+
+MODULE_DESCRIPTION("Richtek RT5033 charger driver");
+MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
+MODULE_LICENSE("GPL");