diff mbox series

[v3,11/14] power: supply: mt6370: Add Mediatek MT6370 charger driver

Message ID 20220623115631.22209-12-peterwu.pub@gmail.com
State New
Headers show
Series Add Mediatek MT6370 PMIC support | expand

Commit Message

ChiaEn Wu June 23, 2022, 11:56 a.m. UTC
From: ChiaEn Wu <chiaen_wu@richtek.com>

Add Mediatek MT6370 charger driver.

Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---
 drivers/power/supply/Kconfig          |   11 +
 drivers/power/supply/Makefile         |    1 +
 drivers/power/supply/mt6370-charger.c | 1132 +++++++++++++++++++++++++++++++++
 3 files changed, 1144 insertions(+)
 create mode 100644 drivers/power/supply/mt6370-charger.c

Comments

Andy Shevchenko June 23, 2022, 6:56 p.m. UTC | #1
On Thu, Jun 23, 2022 at 2:00 PM ChiaEn Wu <peterwu.pub@gmail.com> wrote:
>
> From: ChiaEn Wu <chiaen_wu@richtek.com>
>
> Add Mediatek MT6370 charger driver.

...

> +config CHARGER_MT6370
> +       tristate "Mediatek MT6370 Charger Driver"
> +       depends on MFD_MT6370
> +       depends on REGULATOR
> +       select LINEAR_RANGES
> +       help
> +         Say Y here to enable MT6370 Charger Part.
> +         The device supports High-Accuracy Voltage/Current Regulation,
> +         Average Input Current Regulation, Battery Temperature Sensing,
> +         Over-Temperature Protection, DPDM Detection for BC1.2.

Module name?

...

> +#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>

This usually goes after linux/*

> +#include <linux/atomic.h>
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/iio/consumer.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>

> +#include <linux/of.h>


> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/workqueue.h>

...

> +#define MT6370_MIVR_IBUS_TH            100000          /* 100 mA */

Instead of comment, add proper units.

...

> +       MT6370_USB_STAT_DCP,
> +       MT6370_USB_STAT_CDP,
> +       MT6370_USB_STAT_MAX,

No comma for a terminator line.

...

> +static inline u32 mt6370_chg_val_to_reg(const struct mt6370_chg_range *range,
> +                                       u32 val)
> +static inline u32 mt6370_chg_reg_to_val(const struct mt6370_chg_range *range,
> +                                       u8 reg)

I'm wondering if you can use the
https://elixir.bootlin.com/linux/v5.19-rc3/source/include/linux/linear_range.h
APIs.

...

> +       int ret = 0;

This seems a redundant assignment, see below.

> +       rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
> +                                                "enable", 0,

For index == 0 don't use _index API.

> +                                                GPIOD_OUT_LOW |
> +                                                GPIOD_FLAGS_BIT_NONEXCLUSIVE,
> +                                                rdesc->name);
> +       if (IS_ERR(rcfg->ena_gpiod)) {
> +               dev_err(priv->dev, "Failed to requeset OTG EN Pin\n");

request

> +               rcfg->ena_gpiod = NULL;

So, use _optional and return any errors you got.

> +       } else {
> +               val = MT6370_OPA_MODE_MASK | MT6370_OTG_PIN_EN_MASK;
> +               ret = regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
> +                                        val, val);
> +               if (ret)
> +                       dev_err(priv->dev, "Failed to set otg bits\n");
> +       }

...

> +       irq_num = platform_get_irq_byname(pdev, irq_name);

> +

Unwanted blank line.

> +       if (irq_num < 0) {

> +               dev_err(priv->dev, "Failed to get platform resource\n");

Isn't it printed by the call?

> +       } else {
> +               if (en)
> +                       enable_irq(irq_num);
> +               else
> +                       disable_irq_nosync(irq_num);
> +       }

...

> +toggle_cfo_exit:

The useless label.

> +       return ret;
> +}

...

> +       ret = mt6370_chg_get_online(priv, val);
> +       if (!val->intval) {

No error check?

> +               val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> +               return 0;
> +       }

...

> +static int mt6370_chg_set_online(struct mt6370_priv *priv,
> +                                const union power_supply_propval *val)
> +{
> +       int attach;
> +       u32 pwr_rdy = !!val->intval;
> +
> +       mutex_lock(&priv->attach_lock);
> +       attach = atomic_read(&priv->attach);
> +       if (pwr_rdy == !!attach) {
> +               dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
> +               mutex_unlock(&priv->attach_lock);
> +               return 0;
> +       }
> +
> +       atomic_set(&priv->attach, pwr_rdy);
> +       mutex_unlock(&priv->attach_lock);
> +
> +       if (!queue_work(priv->wq, &priv->bc12_work))
> +               dev_err(priv->dev, "bc12 work has already queued\n");
> +
> +       return 0;

> +

Unwanted blank line.

> +}

> +static int mt6370_chg_get_property(struct power_supply *psy,
> +                                  enum power_supply_property psp,
> +                                  union power_supply_propval *val)
> +{
> +       struct mt6370_priv *priv = power_supply_get_drvdata(psy);
> +       int ret = 0;
> +
> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_ONLINE:
> +               ret = mt6370_chg_get_online(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_STATUS:
> +               ret = mt6370_chg_get_status(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CHARGE_TYPE:
> +               ret = mt6370_chg_get_charge_type(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> +               ret = mt6370_chg_get_ichg(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
> +               ret = mt6370_chg_get_max_ichg(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> +               ret = mt6370_chg_get_cv(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
> +               ret = mt6370_chg_get_max_cv(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +               ret = mt6370_chg_get_aicr(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> +               ret = mt6370_chg_get_mivr(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> +               ret = mt6370_chg_get_iprechg(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> +               ret = mt6370_chg_get_ieoc(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_TYPE:
> +               val->intval = priv->psy_desc->type;
> +               break;
> +       case POWER_SUPPLY_PROP_USB_TYPE:
> +               val->intval = priv->psy_usb_type;
> +               break;
> +       default:
> +               ret = -EINVAL;
> +               break;
> +       }
> +
> +       return ret;

In all cases, return directly.

> +}

...

> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_ONLINE:
> +               ret = mt6370_chg_set_online(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
> +               ret = mt6370_chg_set_ichg(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
> +               ret = mt6370_chg_set_cv(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +               ret = mt6370_chg_set_aicr(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
> +               ret = mt6370_chg_set_mivr(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
> +               ret = mt6370_chg_set_iprechg(priv, val);
> +               break;
> +       case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
> +               ret = mt6370_chg_set_ieoc(priv, val);
> +               break;
> +       default:
> +               ret = -EINVAL;
> +       }
> +       return ret;

As per above.

...

> +       for (i = 0; i < F_MAX; i++) {
> +               priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
> +                                                              priv->regmap,
> +                                                              fds[i].field);
> +               if (IS_ERR(priv->rmap_fields[i])) {
> +                       dev_err(priv->dev,
> +                               "Failed to allocate regmap field [%s]\n",
> +                               fds[i].name);
> +                       return PTR_ERR(priv->rmap_fields[i]);

return dev_err_probe();

> +               }
> +       }

...

> +       mutex_init(&priv->attach_lock);
> +       atomic_set(&priv->attach, 0);

Why not atomic_init() ?
But yeah, usage of it and other locking mechanisms in this driver are
questionable.

...

> +       /* ICHG/IEOC Workaroud, ICHG can not be set less than 900mA */

Workaround

...

> +       return IS_ERR(priv->rdev) ? PTR_ERR(priv->rdev) : 0;

PTR_ERR_OR_ZERO()

...

> +               .of_node = priv->dev->of_node,

dev_of_node() ?

> +       };
> +
> +       priv->psy_desc = &mt6370_chg_psy_desc;
> +       priv->psy_desc->name = dev_name(priv->dev);
> +       priv->psy = devm_power_supply_register(priv->dev, priv->psy_desc, &cfg);
> +
> +       return IS_ERR(priv->psy) ? PTR_ERR(priv->psy) : 0;

PTR_ERR_OR_ZERO()

> +}

...

> +static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
> +{
> +       struct mt6370_priv *priv = data;
> +       u32 otg_en;
> +       int ret;
> +
> +       /* Check in otg mode or not */
> +       ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
> +       if (ret < 0) {
> +               dev_err(priv->dev, "failed to get otg state\n");
> +               return IRQ_HANDLED;

Handled error?

> +       }
> +
> +       if (otg_en)
> +               return IRQ_HANDLED;

> +       mutex_lock(&priv->attach_lock);
> +       atomic_set(&priv->attach, MT6370_ATTACH_STAT_ATTACH_BC12_DONE);
> +       mutex_unlock(&priv->attach_lock);

Mutex around atomic?! It's interesting...

> +       if (!queue_work(priv->wq, &priv->bc12_work))
> +               dev_err(priv->dev, "bc12 work has already queued\n");
> +
> +       return IRQ_HANDLED;
> +}

...

> +       for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
> +               ret = platform_get_irq_byname(to_platform_device(priv->dev),
> +                                             mt6370_chg_irqs[i].name);
> +               if (ret < 0) {
> +                       dev_err(priv->dev, "Failed to get irq %s\n",
> +                               mt6370_chg_irqs[i].name);

Isn't the same printed by the above call?

> +                       return ret;
> +               }
> +
> +               ret = devm_request_threaded_irq(priv->dev, ret, NULL,
> +                                               mt6370_chg_irqs[i].handler,
> +                                               IRQF_TRIGGER_FALLING,
> +                                               dev_name(priv->dev),
> +                                               priv);
> +
> +               if (ret < 0) {
> +                       dev_err(priv->dev, "Failed to request irq %s\n",
> +                               mt6370_chg_irqs[i].name);
> +                       return ret;

return dev_err_probe();

> +               }
> +       }

...

> +static int mt6370_chg_probe(struct platform_device *pdev)
> +{


Use return dev_err_probe(...); pattern.

> +probe_out:
> +       destroy_workqueue(priv->wq);
> +       mutex_destroy(&priv->attach_lock);

I don't see clearly the initialization of these in the ->probe().
Besides that, does destroy_workque() synchronize the actual queue(s)?

Mixing devm_ and non-devm_ may lead to a wrong release order that's
why it is better to see allocating and destroying resources in one
function (they may be wrapped, but should be both of them, seems like
you have done it only for the first parts).

> +       return ret;
> +}

...

> +static int mt6370_chg_remove(struct platform_device *pdev)
> +{
> +       struct mt6370_priv *priv = platform_get_drvdata(pdev);
> +
> +       if (priv) {

Can you describe when this condition can be false?

> +               mt6370_chg_enable_irq(priv, "mivr", false);
> +               cancel_delayed_work_sync(&priv->mivr_dwork);
> +               destroy_workqueue(priv->wq);
> +               mutex_destroy(&priv->attach_lock);
> +       }
> +
> +       return 0;
> +}

...

> +static struct platform_driver mt6370_chg_driver = {
> +       .probe = mt6370_chg_probe,
> +       .remove = mt6370_chg_remove,
> +       .driver = {
> +               .name = "mt6370-charger",
> +               .of_match_table = of_match_ptr(mt6370_chg_of_match),

No good use of of_match_ptr(), please drop it.

> +       },
> +};
diff mbox series

Patch

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 1aa8323..54d8c3a 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -619,6 +619,17 @@  config CHARGER_MT6360
 	  Average Input Current Regulation, Battery Temperature Sensing,
 	  Over-Temperature Protection, DPDM Detection for BC1.2.
 
+config CHARGER_MT6370
+	tristate "Mediatek MT6370 Charger Driver"
+	depends on MFD_MT6370
+	depends on REGULATOR
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable MT6370 Charger Part.
+	  The device supports High-Accuracy Voltage/Current Regulation,
+	  Average Input Current Regulation, Battery Temperature Sensing,
+	  Over-Temperature Protection, DPDM Detection for BC1.2.
+
 config CHARGER_QCOM_SMBB
 	tristate "Qualcomm Switch-Mode Battery Charger and Boost"
 	depends on MFD_SPMI_PMIC || COMPILE_TEST
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 7f02f36..8c95276 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -82,6 +82,7 @@  obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_MP2629)	+= mp2629_charger.o
 obj-$(CONFIG_CHARGER_MT6360)	+= mt6360_charger.o
+obj-$(CONFIG_CHARGER_MT6370)	+= mt6370-charger.o
 obj-$(CONFIG_CHARGER_QCOM_SMBB)	+= qcom_smbb.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
 obj-$(CONFIG_CHARGER_BQ24190)	+= bq24190_charger.o
diff --git a/drivers/power/supply/mt6370-charger.c b/drivers/power/supply/mt6370-charger.c
new file mode 100644
index 0000000..539da62d
--- /dev/null
+++ b/drivers/power/supply/mt6370-charger.c
@@ -0,0 +1,1132 @@ 
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/workqueue.h>
+
+#define MT6370_REG_CHG_CTRL1		0x111
+#define MT6370_REG_CHG_CTRL2		0x112
+#define MT6370_REG_CHG_CTRL3		0x113
+#define MT6370_REG_CHG_CTRL4		0x114
+#define MT6370_REG_CHG_CTRL5		0x115
+#define MT6370_REG_CHG_CTRL6		0x116
+#define MT6370_REG_CHG_CTRL7		0x117
+#define MT6370_REG_CHG_CTRL8		0x118
+#define MT6370_REG_CHG_CTRL9		0x119
+#define MT6370_REG_CHG_CTRL10		0x11A
+#define MT6370_REG_DEVICE_TYPE		0x122
+#define MT6370_REG_USB_STATUS1		0x127
+#define MT6370_REG_CHG_STAT		0x14A
+#define MT6370_REG_FLED_EN		0x17E
+#define MT6370_REG_CHG_STAT1		0X1D0
+#define MT6370_REG_OVPCTRL_STAT		0x1D8
+
+#define MT6370_VOBST_MASK		GENMASK(7, 2)
+#define MT6370_OTG_PIN_EN_MASK		BIT(1)
+#define MT6370_OPA_MODE_MASK		BIT(0)
+#define MT6370_OTG_OC_MASK		GENMASK(2, 0)
+
+#define MT6370_MIVR_IBUS_TH		100000		/* 100 mA */
+
+enum mt6370_chg_reg_field {
+	/* MT6370_REG_CHG_CTRL2 */
+	F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
+	/* MT6370_REG_CHG_CTRL3 */
+	F_IAICR, F_AICR_EN, F_ILIM_EN,
+	/* MT6370_REG_CHG_CTRL4 */
+	F_VOREG,
+	/* MT6370_REG_CHG_CTRL5 */
+	F_VOBST,
+	/* MT6370_REG_CHG_CTRL6 */
+	F_VMIVR,
+	/* MT6370_REG_CHG_CTRL7 */
+	F_ICHG,
+	/* MT6370_REG_CHG_CTRL8 */
+	F_IPREC,
+	/* MT6370_REG_CHG_CTRL9 */
+	F_IEOC,
+	/* MT6370_REG_DEVICE_TYPE */
+	F_USBCHGEN,
+	/* MT6370_REG_USB_STATUS1 */
+	F_USB_STAT, F_CHGDET,
+	/* MT6370_REG_CHG_STAT */
+	F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
+	/* MT6370_REG_FLED_EN */
+	F_FL_STROBE,
+	/* MT6370_REG_CHG_STAT1 */
+	F_CHG_MIVR_STAT,
+	/* MT6370_REG_OVPCTRL_STAT */
+	F_UVP_D_STAT,
+	F_MAX,
+};
+
+struct mt6370_priv {
+	struct device *dev;
+	struct iio_channel *iio_adcs;
+	struct mutex attach_lock;
+	struct power_supply *psy;
+	struct power_supply_desc *psy_desc;
+	struct regmap *regmap;
+	struct regmap_field *rmap_fields[F_MAX];
+	struct regulator_dev *rdev;
+	struct workqueue_struct *wq;
+	struct work_struct bc12_work;
+	struct delayed_work mivr_dwork;
+	atomic_t attach;
+	int psy_usb_type;
+	bool pwr_rdy;
+};
+
+enum mt6370_usb_status {
+	MT6370_USB_STAT_NO_VBUS = 0,
+	MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING,
+	MT6370_USB_STAT_SDP,
+	MT6370_USB_STAT_SDP_NSTD,
+	MT6370_USB_STAT_DCP,
+	MT6370_USB_STAT_CDP,
+	MT6370_USB_STAT_MAX,
+};
+
+struct mt6370_chg_range {
+	u32 min;
+	u32 max;
+	u16 step;
+	u8 offset;
+	const u32 *table;
+	u16 num_table;
+	bool round_up;
+};
+
+struct mt6370_chg_field {
+	const char *name;
+	const struct mt6370_chg_range *range;
+	struct reg_field field;
+};
+
+static const u32 mt6370_chg_otg_oc_ma[] = {
+	500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
+};
+
+#define MT6370_CHG_RANGE(_min, _max, _step, _offset, _ru)		\
+{									\
+	.min = _min,							\
+	.max = _max,							\
+	.step = _step,							\
+	.offset = _offset,						\
+	.round_up = _ru,						\
+}
+
+#define MT6370_CHG_RANGE_T(_table, _ru)					\
+{									\
+	.table = _table,						\
+	.num_table = ARRAY_SIZE(_table),				\
+	.round_up = _ru,						\
+}
+
+static const struct mt6370_chg_range mt6370_chg_ranges[F_MAX] = {
+	[F_IAICR] = MT6370_CHG_RANGE(100, 3250, 50, 0, false),
+	[F_VOREG] = MT6370_CHG_RANGE(3900, 4710, 10, 0, false),
+	[F_VOBST] = MT6370_CHG_RANGE(4425, 5825, 25, 0, false),
+	[F_VMIVR] = MT6370_CHG_RANGE(3900, 13400, 100, 0, true),
+	[F_ICHG] = MT6370_CHG_RANGE(900, 5000, 100, 8, false),
+	[F_IPREC] = MT6370_CHG_RANGE(100, 850, 50, 0, false),
+	[F_IEOC] = MT6370_CHG_RANGE(100, 850, 50, 0, false),
+};
+
+#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb, _range)		\
+[_fd] = {								\
+	.name = #_fd,							\
+	.range = _range ? &mt6370_chg_ranges[_fd] : NULL,		\
+	.field = REG_FIELD(_reg, _lsb, _msb),				\
+}
+
+#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb)				\
+	MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb, (_msb > _lsb))
+
+static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
+	MT6370_CHG_FIELD_RANGE(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3, false),
+	MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1),
+	MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0),
+	MT6370_CHG_FIELD(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7),
+	MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1),
+	MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0),
+	MT6370_CHG_FIELD(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
+	MT6370_CHG_FIELD(F_VOBST, MT6370_REG_CHG_CTRL5, 2, 7),
+	MT6370_CHG_FIELD(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
+	MT6370_CHG_FIELD(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
+	MT6370_CHG_FIELD(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
+	MT6370_CHG_FIELD(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
+	MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
+	MT6370_CHG_FIELD_RANGE(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6, false),
+	MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
+	MT6370_CHG_FIELD_RANGE(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7, false),
+	MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3),
+	MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5),
+	MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2),
+	MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6),
+	MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4),
+};
+
+static inline u32 mt6370_chg_val_to_reg(const struct mt6370_chg_range *range,
+					u32 val)
+{
+	int i;
+	u8 reg;
+
+	if (!range)
+		return val;
+
+	if (range->table) {
+		if (val <= range->table[0])
+			return 0;
+
+		for (i = 1; i < range->num_table - 1; i++) {
+			if (val == range->table[i])
+				return i;
+			if (val > range->table[i] &&
+			    val < range->table[i + 1])
+				return range->round_up ? i + 1 : i;
+		}
+
+		return range->num_table - 1;
+	}
+
+	if (val <= range->min)
+		reg = 0;
+	else if (val >= range->max)
+		reg = (range->max - range->min) / range->step;
+	else if (range->round_up)
+		reg = DIV_ROUND_UP(val - range->min, range->step);
+	else
+		reg = (val - range->min) / range->step;
+
+	return reg + range->offset;
+}
+
+static inline u32 mt6370_chg_reg_to_val(const struct mt6370_chg_range *range,
+					u8 reg)
+{
+	if (!range)
+		return reg;
+
+	return range->table ? range->table[reg] :
+			      range->min + range->step * (reg - range->offset);
+}
+
+static inline int mt6370_chg_field_get(struct mt6370_priv *priv,
+				       enum mt6370_chg_reg_field fd, u32 *val)
+{
+	int ret;
+	u32 reg_val;
+
+	ret = regmap_field_read(priv->rmap_fields[fd], &reg_val);
+	if (ret < 0)
+		return ret;
+
+	*val = mt6370_chg_reg_to_val(mt6370_chg_fields[fd].range, reg_val);
+
+	return 0;
+}
+
+static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
+				       enum mt6370_chg_reg_field fd, u32 val)
+{
+	val = mt6370_chg_val_to_reg(mt6370_chg_fields[fd].range, val);
+
+	return regmap_field_write(priv->rmap_fields[fd], val);
+}
+
+enum {
+	MT6370_CHG_STAT_READY = 0,
+	MT6370_CHG_STAT_CHARGE_IN_PROGRESS,
+	MT6370_CHG_STAT_DONE,
+	MT6370_CHG_STAT_FAULT,
+	MT6370_CHG_STAT_MAX,
+};
+
+enum {
+	MT6370_ATTACH_STAT_DETACH = 0,
+	MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE,
+	MT6370_ATTACH_STAT_ATTACH_BC12_DONE,
+	MT6370_ATTACH_STAT_ATTACH_MAX,
+};
+
+static int mt6370_chg_otg_of_parse_cb(struct device_node *of,
+				      const struct regulator_desc *rdesc,
+				      struct regulator_config *rcfg)
+{
+	struct mt6370_priv *priv = rcfg->driver_data;
+	unsigned int val;
+	int ret = 0;
+
+	rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of),
+						 "enable", 0,
+						 GPIOD_OUT_LOW |
+						 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+						 rdesc->name);
+	if (IS_ERR(rcfg->ena_gpiod)) {
+		dev_err(priv->dev, "Failed to requeset OTG EN Pin\n");
+		rcfg->ena_gpiod = NULL;
+	} else {
+		val = MT6370_OPA_MODE_MASK | MT6370_OTG_PIN_EN_MASK;
+		ret = regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
+					 val, val);
+		if (ret)
+			dev_err(priv->dev, "Failed to set otg bits\n");
+	}
+
+	return ret;
+}
+
+static void mt6370_chg_bc12_work_func(struct work_struct *work)
+{
+	struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+						bc12_work);
+	int ret, attach;
+	bool rpt_psy = false;
+	u32 usb_stat;
+
+	mutex_lock(&priv->attach_lock);
+	attach = atomic_read(&priv->attach);
+
+	switch (attach) {
+	case MT6370_ATTACH_STAT_DETACH:
+		usb_stat = 0;
+		break;
+	case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
+		ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
+		if (ret < 0) {
+			dev_err(priv->dev, "Failed to get USB status\n");
+			goto bc12_work_func_out;
+		}
+		break;
+	case MT6370_ATTACH_STAT_ATTACH_BC12_NOT_DONE:
+		ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
+		if (ret < 0)
+			dev_err(priv->dev, "Failed to enable USB CHG EN\n");
+		goto bc12_work_func_out;
+	default:
+		dev_err(priv->dev, "Invalid attach state\n");
+		goto bc12_work_func_out;
+	}
+
+	rpt_psy = true;
+
+	switch (usb_stat) {
+	case MT6370_USB_STAT_SDP:
+		priv->psy_desc->type = POWER_SUPPLY_TYPE_USB;
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6370_USB_STAT_SDP_NSTD:
+		priv->psy_desc->type = POWER_SUPPLY_TYPE_USB;
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case MT6370_USB_STAT_DCP:
+		priv->psy_desc->type = POWER_SUPPLY_TYPE_USB_DCP;
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	case MT6370_USB_STAT_CDP:
+		priv->psy_desc->type = POWER_SUPPLY_TYPE_USB_CDP;
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	case MT6370_USB_STAT_NO_VBUS:
+	case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING:
+	default:
+		priv->psy_desc->type = POWER_SUPPLY_TYPE_USB;
+		priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		break;
+	}
+
+bc12_work_func_out:
+	mutex_unlock(&priv->attach_lock);
+
+	if (rpt_psy)
+		power_supply_changed(priv->psy);
+}
+
+static inline void mt6370_chg_enable_irq(struct mt6370_priv *priv,
+					 const char *irq_name, bool en)
+{
+	int irq_num;
+	struct platform_device *pdev = to_platform_device(priv->dev);
+
+	irq_num = platform_get_irq_byname(pdev, irq_name);
+
+	if (irq_num < 0) {
+		dev_err(priv->dev, "Failed to get platform resource\n");
+	} else {
+		if (en)
+			enable_irq(irq_num);
+		else
+			disable_irq_nosync(irq_num);
+	}
+}
+
+static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
+{
+	int ret;
+	u32 fl_strobe;
+
+	/* check if flash led in strobe mode */
+	ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
+		goto toggle_cfo_exit;
+	}
+
+	if (fl_strobe) {
+		dev_err(priv->dev, "Flash led is still in strobe mode\n");
+		goto toggle_cfo_exit;
+	}
+
+	/* cfo off */
+	ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to disable CFO_EN\n");
+		goto toggle_cfo_exit;
+	}
+
+	/* cfo on */
+	ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to enable CFO_EN\n");
+		goto toggle_cfo_exit;
+	}
+
+toggle_cfo_exit:
+	return ret;
+}
+
+static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
+				    int *val)
+{
+	int ret;
+
+	if (chan >= MT6370_CHAN_MAX)
+		return -EINVAL;
+
+	ret = iio_read_channel_processed(&priv->iio_adcs[chan], val);
+	if (ret)
+		dev_err(priv->dev, "Failed to read adc\n");
+
+	return ret;
+}
+
+static void mt6370_chg_mivr_dwork_func(struct work_struct *work)
+{
+	struct mt6370_priv *priv = container_of(work, struct mt6370_priv,
+						mivr_dwork.work);
+	int ret;
+	u32 mivr_stat;
+	unsigned int ibus;
+
+	ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to get mivr state\n");
+		goto mivr_handler_out;
+	}
+
+	if (!mivr_stat)
+		goto mivr_handler_out;
+
+	ret = mt6370_chg_read_adc_chan(priv, MT6370_CHAN_IBUS, &ibus);
+	if (ret) {
+		dev_err(priv->dev, "Failed to get ibus\n");
+		goto mivr_handler_out;
+	}
+
+	if (ibus < MT6370_MIVR_IBUS_TH) {
+		ret = mt6370_chg_toggle_cfo(priv);
+		if (ret)
+			dev_err(priv->dev, "Failed to toggle cfo\n");
+	}
+
+mivr_handler_out:
+	mt6370_chg_enable_irq(priv, "mivr", true);
+	pm_relax(priv->dev);
+}
+
+static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
+{
+	int ret;
+	u32 pwr_rdy, otg_en;
+	union power_supply_propval val;
+
+	/* Check in otg mode or not */
+	ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to get otg state\n");
+		return;
+	}
+
+	if (otg_en)
+		return;
+
+	ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &pwr_rdy);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to get pwr_rdy state reg\n");
+		return;
+	}
+
+	val.intval = !pwr_rdy;
+
+	ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
+					&val);
+	if (ret)
+		dev_err(priv->dev, "Failed to start attach/detach flow\n");
+}
+
+static int mt6370_chg_get_online(struct mt6370_priv *priv,
+				 union power_supply_propval *val)
+{
+	mutex_lock(&priv->attach_lock);
+	val->intval = !!atomic_read(&priv->attach);
+	mutex_unlock(&priv->attach_lock);
+
+	return 0;
+}
+
+static int mt6370_chg_get_status(struct mt6370_priv *priv,
+				 union power_supply_propval *val)
+{
+	int ret;
+	u32 chg_stat;
+
+	ret = mt6370_chg_get_online(priv, val);
+	if (!val->intval) {
+		val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		return 0;
+	}
+
+	ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+	if (ret < 0)
+		return ret;
+
+	switch (chg_stat) {
+	case MT6370_CHG_STAT_READY:
+	case MT6370_CHG_STAT_FAULT:
+		val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+		val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case MT6370_CHG_STAT_DONE:
+		val->intval = POWER_SUPPLY_STATUS_FULL;
+		break;
+	default:
+		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+		break;
+	}
+
+	return ret;
+}
+
+static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
+				      union power_supply_propval *val)
+{
+	int type, ret;
+	u32 chg_stat, vbat_lvl;
+
+	ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
+	if (ret < 0)
+		return ret;
+
+	ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
+	if (ret < 0)
+		return ret;
+
+	switch (chg_stat) {
+	case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
+		if (vbat_lvl)
+			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else
+			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case MT6370_CHG_STAT_READY:
+	case MT6370_CHG_STAT_DONE:
+	case MT6370_CHG_STAT_FAULT:
+	default:
+		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	}
+
+	val->intval = type;
+
+	return 0;
+}
+
+static int mt6370_chg_get_ichg(struct mt6370_priv *priv,
+			       union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
+}
+
+static int mt6370_chg_get_max_ichg(struct mt6370_priv *priv,
+				   union power_supply_propval *val)
+{
+	return mt6370_chg_ranges[F_ICHG].max;
+}
+
+static int mt6370_chg_get_cv(struct mt6370_priv *priv,
+			     union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
+}
+
+static int mt6370_chg_get_max_cv(struct mt6370_priv *priv,
+				 union power_supply_propval *val)
+{
+	return mt6370_chg_ranges[F_VOREG].max;
+}
+
+static int mt6370_chg_get_aicr(struct mt6370_priv *priv,
+			       union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
+}
+
+static int mt6370_chg_get_mivr(struct mt6370_priv *priv,
+			       union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
+}
+
+static int mt6370_chg_get_iprechg(struct mt6370_priv *priv,
+				  union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
+}
+
+static int mt6370_chg_get_ieoc(struct mt6370_priv *priv,
+			       union power_supply_propval *val)
+{
+	return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
+}
+
+static int mt6370_chg_set_online(struct mt6370_priv *priv,
+				 const union power_supply_propval *val)
+{
+	int attach;
+	u32 pwr_rdy = !!val->intval;
+
+	mutex_lock(&priv->attach_lock);
+	attach = atomic_read(&priv->attach);
+	if (pwr_rdy == !!attach) {
+		dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
+		mutex_unlock(&priv->attach_lock);
+		return 0;
+	}
+
+	atomic_set(&priv->attach, pwr_rdy);
+	mutex_unlock(&priv->attach_lock);
+
+	if (!queue_work(priv->wq, &priv->bc12_work))
+		dev_err(priv->dev, "bc12 work has already queued\n");
+
+	return 0;
+
+}
+
+static int mt6370_chg_set_ichg(struct mt6370_priv *priv,
+			       const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_ICHG, val->intval);
+}
+
+static int mt6370_chg_set_cv(struct mt6370_priv *priv,
+			     const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_VOREG, val->intval);
+}
+
+static int mt6370_chg_set_aicr(struct mt6370_priv *priv,
+			       const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_IAICR, val->intval);
+}
+
+static int mt6370_chg_set_mivr(struct mt6370_priv *priv,
+			       const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
+}
+
+static int mt6370_chg_set_iprechg(struct mt6370_priv *priv,
+				  const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_IPREC, val->intval);
+}
+
+static int mt6370_chg_set_ieoc(struct mt6370_priv *priv,
+			       const union power_supply_propval *val)
+{
+	return mt6370_chg_field_set(priv, F_IEOC, val->intval);
+}
+
+static int mt6370_chg_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6370_chg_get_online(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = mt6370_chg_get_status(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		ret = mt6370_chg_get_charge_type(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6370_chg_get_ichg(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		ret = mt6370_chg_get_max_ichg(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6370_chg_get_cv(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		ret = mt6370_chg_get_max_cv(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6370_chg_get_aicr(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		ret = mt6370_chg_get_mivr(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6370_chg_get_iprechg(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6370_chg_get_ieoc(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_TYPE:
+		val->intval = priv->psy_desc->type;
+		break;
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		val->intval = priv->psy_usb_type;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int mt6370_chg_set_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   const union power_supply_propval *val)
+{
+	struct mt6370_priv *priv = power_supply_get_drvdata(psy);
+	int ret;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6370_chg_set_online(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6370_chg_set_ichg(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6370_chg_set_cv(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6370_chg_set_aicr(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+		ret = mt6370_chg_set_mivr(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6370_chg_set_iprechg(priv, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6370_chg_set_ieoc(priv, val);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+static int mt6370_chg_property_is_writeable(struct power_supply *psy,
+					    enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static enum power_supply_property mt6370_chg_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+	POWER_SUPPLY_PROP_TYPE,
+	POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static enum power_supply_usb_type mt6370_chg_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+};
+
+static struct power_supply_desc mt6370_chg_psy_desc = {
+	.type = POWER_SUPPLY_TYPE_USB,
+	.properties = mt6370_chg_properties,
+	.num_properties = ARRAY_SIZE(mt6370_chg_properties),
+	.get_property = mt6370_chg_get_property,
+	.set_property = mt6370_chg_set_property,
+	.property_is_writeable = mt6370_chg_property_is_writeable,
+	.usb_types = mt6370_chg_usb_types,
+	.num_usb_types = ARRAY_SIZE(mt6370_chg_usb_types),
+};
+
+static const struct regulator_ops mt6370_chg_otg_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_current_limit = regulator_set_current_limit_regmap,
+	.get_current_limit = regulator_get_current_limit_regmap,
+};
+
+static const struct regulator_desc mt6370_chg_otg_rdesc = {
+	.of_match = "usb-otg-vbus-regulator",
+	.of_parse_cb = mt6370_chg_otg_of_parse_cb,
+	.name = "mt6370-usb-otg-vbus",
+	.ops = &mt6370_chg_otg_ops,
+	.owner = THIS_MODULE,
+	.type = REGULATOR_VOLTAGE,
+	.min_uV = 4425000,
+	.uV_step = 25000,
+	.n_voltages = 57,
+	.vsel_reg = MT6370_REG_CHG_CTRL5,
+	.vsel_mask = MT6370_VOBST_MASK,
+	.enable_reg = MT6370_REG_CHG_CTRL1,
+	.enable_mask = MT6370_OPA_MODE_MASK,
+	.curr_table = mt6370_chg_otg_oc_ma,
+	.n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma),
+	.csel_reg = MT6370_REG_CHG_CTRL10,
+	.csel_mask = MT6370_OTG_OC_MASK,
+};
+
+static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv)
+{
+	int i;
+	const struct mt6370_chg_field *fds = mt6370_chg_fields;
+
+	for (i = 0; i < F_MAX; i++) {
+		priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev,
+							       priv->regmap,
+							       fds[i].field);
+		if (IS_ERR(priv->rmap_fields[i])) {
+			dev_err(priv->dev,
+				"Failed to allocate regmap field [%s]\n",
+				fds[i].name);
+			return PTR_ERR(priv->rmap_fields[i]);
+		}
+	}
+
+	return 0;
+}
+
+static int mt6370_chg_init_setting(struct mt6370_priv *priv)
+{
+	int ret;
+
+	priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
+	if (IS_ERR(priv->wq)) {
+		dev_err(priv->dev, "Failed to create workqueue\n");
+		return PTR_ERR(priv->wq);
+	}
+
+	INIT_WORK(&priv->bc12_work, mt6370_chg_bc12_work_func);
+	INIT_DELAYED_WORK(&priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
+	mutex_init(&priv->attach_lock);
+	atomic_set(&priv->attach, 0);
+
+	/* Disable usb_chg_en */
+	ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to disable usb_chg_en\n");
+		return ret;
+	}
+
+	/* ICHG/IEOC Workaroud, ICHG can not be set less than 900mA */
+	ret = mt6370_chg_field_set(priv, F_ICHG, 900);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to set ICHG to 900mA");
+		return ret;
+	}
+
+	/* Change input current limit selection to using IAICR results */
+	ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 3);
+	if (ret < 0) {
+		dev_err(priv->dev, "Failed to set IINLMTSEL\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+#define MT6370_CHG_DT_PROP_DECL(_name, _type, _field)	\
+{							\
+	.name = "mediatek,chg-" #_name,			\
+	.type = MT6370_PARSE_TYPE_##_type,		\
+	.fd = _field,					\
+}
+
+static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv)
+{
+	struct regulator_config rcfg = {
+		.dev = priv->dev,
+		.regmap = priv->regmap,
+		.driver_data = priv,
+	};
+
+	priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc,
+					     &rcfg);
+
+	return IS_ERR(priv->rdev) ? PTR_ERR(priv->rdev) : 0;
+}
+
+static int mt6370_chg_init_psy(struct mt6370_priv *priv)
+{
+	struct power_supply_config cfg = {
+		.drv_data = priv,
+		.of_node = priv->dev->of_node,
+	};
+
+	priv->psy_desc = &mt6370_chg_psy_desc;
+	priv->psy_desc->name = dev_name(priv->dev);
+	priv->psy = devm_power_supply_register(priv->dev, priv->psy_desc, &cfg);
+
+	return IS_ERR(priv->psy) ? PTR_ERR(priv->psy) : 0;
+}
+
+static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+	u32 otg_en;
+	int ret;
+
+	/* Check in otg mode or not */
+	ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
+	if (ret < 0) {
+		dev_err(priv->dev, "failed to get otg state\n");
+		return IRQ_HANDLED;
+	}
+
+	if (otg_en)
+		return IRQ_HANDLED;
+
+	mutex_lock(&priv->attach_lock);
+	atomic_set(&priv->attach, MT6370_ATTACH_STAT_ATTACH_BC12_DONE);
+	mutex_unlock(&priv->attach_lock);
+
+	if (!queue_work(priv->wq, &priv->bc12_work))
+		dev_err(priv->dev, "bc12 work has already queued\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+
+	mt6370_chg_pwr_rdy_check(priv);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mt6370_mivr_handler(int irq, void *data)
+{
+	struct mt6370_priv *priv = data;
+
+	pm_stay_awake(priv->dev);
+	mt6370_chg_enable_irq(priv, "mivr", false);
+	schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200));
+
+	return IRQ_HANDLED;
+}
+
+#define MT6370_CHG_IRQ(_name)						\
+{									\
+	.name = #_name,							\
+	.handler = mt6370_##_name##_handler,				\
+}
+
+static int mt6370_chg_init_irq(struct mt6370_priv *priv)
+{
+	int i, ret;
+	const struct {
+		char *name;
+		irq_handler_t handler;
+	} mt6370_chg_irqs[] = {
+		MT6370_CHG_IRQ(attach_i),
+		MT6370_CHG_IRQ(uvp_d_evt),
+		MT6370_CHG_IRQ(mivr),
+	};
+
+	for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) {
+		ret = platform_get_irq_byname(to_platform_device(priv->dev),
+					      mt6370_chg_irqs[i].name);
+		if (ret < 0) {
+			dev_err(priv->dev, "Failed to get irq %s\n",
+				mt6370_chg_irqs[i].name);
+			return ret;
+		}
+
+		ret = devm_request_threaded_irq(priv->dev, ret, NULL,
+						mt6370_chg_irqs[i].handler,
+						IRQF_TRIGGER_FALLING,
+						dev_name(priv->dev),
+						priv);
+
+		if (ret < 0) {
+			dev_err(priv->dev, "Failed to request irq %s\n",
+				mt6370_chg_irqs[i].name);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int mt6370_chg_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct mt6370_priv *priv;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = &pdev->dev;
+
+	priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!priv->regmap) {
+		dev_err(&pdev->dev, "Failed to get regmap\n");
+		return -ENODEV;
+	}
+
+	ret = mt6370_chg_init_rmap_fields(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init regmap fields\n");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, priv);
+
+	priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
+	if (IS_ERR(priv->iio_adcs)) {
+		dev_err(&pdev->dev, "Failed to get iio adc\n");
+		return PTR_ERR(priv->iio_adcs);
+	}
+
+	ret = mt6370_chg_init_otg_regulator(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init otg regulator\n");
+		return ret;
+	}
+
+	ret = mt6370_chg_init_psy(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init psy\n");
+		return ret;
+	}
+
+	ret = mt6370_chg_init_setting(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init mt6370 private data\n");
+		goto probe_out;
+	}
+
+	ret = mt6370_chg_init_irq(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init irq\n");
+		goto probe_out;
+	}
+
+	mt6370_chg_pwr_rdy_check(priv);
+
+	return 0;
+
+probe_out:
+	destroy_workqueue(priv->wq);
+	mutex_destroy(&priv->attach_lock);
+
+	return ret;
+}
+
+static int mt6370_chg_remove(struct platform_device *pdev)
+{
+	struct mt6370_priv *priv = platform_get_drvdata(pdev);
+
+	if (priv) {
+		mt6370_chg_enable_irq(priv, "mivr", false);
+		cancel_delayed_work_sync(&priv->mivr_dwork);
+		destroy_workqueue(priv->wq);
+		mutex_destroy(&priv->attach_lock);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id mt6370_chg_of_match[] = {
+	{ .compatible = "mediatek,mt6370-charger", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mt6370_chg_of_match);
+
+static struct platform_driver mt6370_chg_driver = {
+	.probe = mt6370_chg_probe,
+	.remove = mt6370_chg_remove,
+	.driver = {
+		.name = "mt6370-charger",
+		.of_match_table = of_match_ptr(mt6370_chg_of_match),
+	},
+};
+module_platform_driver(mt6370_chg_driver);
+
+MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>");
+MODULE_DESCRIPTION("Mediatek MT6370 Charger Driver");
+MODULE_LICENSE("GPL v2");