#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/devm-helpers.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/linear_range.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_100_mA 100000
#define MT6370_ADC_CHAN_IBUS 5
#define MT6370_ADC_CHAN_MAX 9
enum mt6370_chg_reg_field {
F_IINLMTSEL, F_CFO_EN, F_CHG_EN,
F_IAICR, F_AICR_EN, F_ILIM_EN,
F_VOREG,
F_VMIVR,
F_ICHG,
F_IPREC,
F_IEOC,
F_USBCHGEN,
F_USB_STAT, F_CHGDET,
F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL,
F_FL_STROBE,
F_CHG_MIVR_STAT,
F_UVP_D_STAT,
F_MAX
};
enum mt6370_irq {
MT6370_IRQ_ATTACH_I = 0,
MT6370_IRQ_UVP_D_EVT,
MT6370_IRQ_MIVR,
MT6370_IRQ_MAX
};
struct mt6370_priv {
struct device *dev;
struct iio_channel *iio_adcs;
struct mutex attach_lock;
struct power_supply *psy;
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;
unsigned int irq_nums[MT6370_IRQ_MAX];
int 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_field {
const char *name;
const struct linear_range *range;
struct reg_field field;
};
enum {
MT6370_RANGE_F_IAICR = 0,
MT6370_RANGE_F_VOREG,
MT6370_RANGE_F_VMIVR,
MT6370_RANGE_F_ICHG,
MT6370_RANGE_F_IPREC,
MT6370_RANGE_F_IEOC,
MT6370_RANGE_F_MAX
};
static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = {
LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000),
LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000),
};
#define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \
[_fd] = { \
.name = #_fd, \
.range = NULL, \
.field = REG_FIELD(_reg, _lsb, _msb), \
}
#define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \
[_fd] = { \
.name = #_fd, \
.range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \
.field = REG_FIELD(_reg, _lsb, _msb), \
}
static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = {
MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3),
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_RANGE(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_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7),
MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7),
MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7),
MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3),
MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7),
MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7),
MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6),
MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3),
MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7),
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 int mt6370_chg_field_get(struct mt6370_priv *priv,
enum mt6370_chg_reg_field fd,
unsigned int *val)
{
int ret;
unsigned int reg_val;
ret = regmap_field_read(priv->rmap_fields[fd], ®_val);
if (ret)
return ret;
if (mt6370_chg_fields[fd].range)
return linear_range_get_value(mt6370_chg_fields[fd].range,
reg_val, val);
*val = reg_val;
return 0;
}
static inline int mt6370_chg_field_set(struct mt6370_priv *priv,
enum mt6370_chg_reg_field fd,
unsigned int val)
{
int ret;
bool f;
const struct linear_range *r;
if (mt6370_chg_fields[fd].range) {
r = mt6370_chg_fields[fd].range;
if (fd == F_VMIVR) {
ret = linear_range_get_selector_high(r, val, &val, &f);
if (ret)
val = r->max_sel;
} else {
linear_range_get_selector_within(r, val, &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_WAIT_FOR_BC12,
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;
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)) {
rcfg->ena_gpiod = NULL;
return 0;
}
return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1,
MT6370_OTG_PIN_EN_MASK,
MT6370_OTG_PIN_EN_MASK);
}
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;
bool rpt_psy = false;
unsigned int attach, usb_stat;
mutex_lock(&priv->attach_lock);
attach = priv->attach;
switch (attach) {
case MT6370_ATTACH_STAT_DETACH:
usb_stat = 0;
break;
case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12:
ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach);
if (ret)
dev_err(priv->dev, "Failed to enable USB CHG EN\n");
goto bc12_work_func_out;
case MT6370_ATTACH_STAT_ATTACH_BC12_DONE:
ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat);
if (ret) {
dev_err(priv->dev, "Failed to get USB status\n");
goto bc12_work_func_out;
}
break;
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:
case MT6370_USB_STAT_SDP_NSTD:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
break;
case MT6370_USB_STAT_DCP:
priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
break;
case MT6370_USB_STAT_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_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 int mt6370_chg_toggle_cfo(struct mt6370_priv *priv)
{
int ret;
unsigned int fl_strobe;
ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe);
if (ret) {
dev_err(priv->dev, "Failed to get FL_STROBE_EN\n");
return ret;
}
if (fl_strobe) {
dev_err(priv->dev, "Flash led is still in strobe mode\n");
return -EINVAL;
}
ret = mt6370_chg_field_set(priv, F_CFO_EN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable CFO_EN\n");
return ret;
}
ret = mt6370_chg_field_set(priv, F_CFO_EN, 1);
if (ret)
dev_err(priv->dev, "Failed to enable CFO_EN\n");
return ret;
}
static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan,
int *val)
{
int ret;
if (chan >= MT6370_ADC_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;
unsigned int mivr_stat, ibus;
ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat);
if (ret) {
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_ADC_CHAN_IBUS, &ibus);
if (ret) {
dev_err(priv->dev, "Failed to get ibus\n");
goto mivr_handler_out;
}
if (ibus < MT6370_MIVR_IBUS_TH_100_mA) {
ret = mt6370_chg_toggle_cfo(priv);
if (ret)
dev_err(priv->dev, "Failed to toggle cfo\n");
}
mivr_handler_out:
enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]);
pm_relax(priv->dev);
}
static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv)
{
int ret;
unsigned int opposite_pwr_rdy, otg_en;
union power_supply_propval val;
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
if (ret) {
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, &opposite_pwr_rdy);
if (ret) {
dev_err(priv->dev, "Failed to get opposite power ready state\n");
return;
}
val.intval = opposite_pwr_rdy ?
MT6370_ATTACH_STAT_DETACH :
MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12;
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 = !!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;
unsigned int chg_stat;
union power_supply_propval online;
ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE,
&online);
if (ret) {
dev_err(priv->dev, "Failed to get online status\n");
return ret;
}
if (!online.intval) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
if (ret)
return ret;
switch (chg_stat) {
case MT6370_CHG_STAT_READY:
case MT6370_CHG_STAT_FAULT:
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
return ret;
case MT6370_CHG_STAT_CHARGE_IN_PROGRESS:
val->intval = POWER_SUPPLY_STATUS_CHARGING;
return ret;
case MT6370_CHG_STAT_DONE:
val->intval = POWER_SUPPLY_STATUS_FULL;
return ret;
default:
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
return ret;
}
}
static int mt6370_chg_get_charge_type(struct mt6370_priv *priv,
union power_supply_propval *val)
{
int type, ret;
unsigned int chg_stat, vbat_lvl;
ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat);
if (ret)
return ret;
ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl);
if (ret)
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_set_online(struct mt6370_priv *priv,
const union power_supply_propval *val)
{
bool pwr_rdy = !!val->intval;
mutex_lock(&priv->attach_lock);
if (pwr_rdy == !!priv->attach) {
dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy);
mutex_unlock(&priv->attach_lock);
return 0;
}
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_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);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return mt6370_chg_get_online(priv, val);
case POWER_SUPPLY_PROP_STATUS:
return mt6370_chg_get_status(priv, val);
case POWER_SUPPLY_PROP_CHARGE_TYPE:
return mt6370_chg_get_charge_type(priv, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return mt6370_chg_field_get(priv, F_ICHG, &val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]);
return 0;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return mt6370_chg_field_get(priv, F_VOREG, &val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]);
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return mt6370_chg_field_get(priv, F_IAICR, &val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return mt6370_chg_field_get(priv, F_VMIVR, &val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return mt6370_chg_field_get(priv, F_IPREC, &val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return mt6370_chg_field_get(priv, F_IEOC, &val->intval);
case POWER_SUPPLY_PROP_USB_TYPE:
val->intval = priv->psy_usb_type;
return 0;
default:
return -EINVAL;
}
}
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);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return mt6370_chg_set_online(priv, val);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
return mt6370_chg_field_set(priv, F_ICHG, val->intval);
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
return mt6370_chg_field_set(priv, F_VOREG, val->intval);
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
return mt6370_chg_field_set(priv, F_IAICR, val->intval);
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
return mt6370_chg_field_set(priv, F_VMIVR, val->intval);
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
return mt6370_chg_field_set(priv, F_IPREC, val->intval);
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return mt6370_chg_field_set(priv, F_IEOC, val->intval);
default:
return -EINVAL;
}
}
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_USB_TYPE,
};
static const struct power_supply_desc mt6370_chg_psy_desc = {
.name = "mt6370-charger",
.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 = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
BIT(POWER_SUPPLY_USB_TYPE_CDP) |
BIT(POWER_SUPPLY_USB_TYPE_DCP) |
BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
};
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 u32 mt6370_chg_otg_oc_ma[] = {
500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000,
};
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]))
return dev_err_probe(priv->dev,
PTR_ERR(priv->rmap_fields[i]),
"Failed to allocate regmapfield[%s]\n",
fds[i].name);
}
return 0;
}
static int mt6370_chg_init_setting(struct mt6370_priv *priv)
{
int ret;
ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable usb_chg_en\n");
return ret;
}
ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0);
if (ret) {
dev_err(priv->dev, "Failed to disable input current limit\n");
return ret;
}
ret = mt6370_chg_field_set(priv, F_ICHG, 900000);
if (ret) {
dev_err(priv->dev, "Failed to set ICHG to 900mA");
return ret;
}
ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2);
if (ret) {
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 PTR_ERR_OR_ZERO(priv->rdev);
}
static int mt6370_chg_init_psy(struct mt6370_priv *priv)
{
struct power_supply_config cfg = {
.drv_data = priv,
.fwnode = dev_fwnode(priv->dev),
};
priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc,
&cfg);
return PTR_ERR_OR_ZERO(priv->psy);
}
static void mt6370_chg_destroy_wq(void *data)
{
struct workqueue_struct *wq = data;
destroy_workqueue(wq);
}
static irqreturn_t mt6370_attach_i_handler(int irq, void *data)
{
struct mt6370_priv *priv = data;
unsigned int otg_en;
int ret;
ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en);
if (ret) {
dev_err(priv->dev, "Failed to get OTG state\n");
return IRQ_NONE;
}
if (otg_en)
return IRQ_HANDLED;
mutex_lock(&priv->attach_lock);
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);
disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]);
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)
return ret;
priv->irq_nums[i] = 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)
return dev_err_probe(priv->dev, ret,
"Failed to request irq %s\n",
mt6370_chg_irqs[i].name);
}
return 0;
}
static int mt6370_chg_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mt6370_priv *priv;
int ret;
priv = devm_kzalloc(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)
return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");
ret = mt6370_chg_init_rmap_fields(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init regmap fields\n");
platform_set_drvdata(pdev, priv);
priv->iio_adcs = devm_iio_channel_get_all(priv->dev);
if (IS_ERR(priv->iio_adcs))
return dev_err_probe(dev, PTR_ERR(priv->iio_adcs),
"Failed to get iio adc\n");
ret = mt6370_chg_init_otg_regulator(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init OTG regulator\n");
ret = mt6370_chg_init_psy(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to init psy\n");
ret = devm_mutex_init(dev, &priv->attach_lock);
if (ret)
return ret;
priv->attach = MT6370_ATTACH_STAT_DETACH;
priv->wq = create_singlethread_workqueue(dev_name(priv->dev));
if (!priv->wq)
return -ENOMEM;
ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq);
if (ret)
return ret;
ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func);
if (ret)
return dev_err_probe(dev, ret, "Failed to init bc12 work\n");
ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func);
if (ret)
return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n");
ret = mt6370_chg_init_setting(priv);
if (ret)
return dev_err_probe(dev, ret,
"Failed to init mt6370 charger setting\n");
ret = mt6370_chg_init_irq(priv);
if (ret)
return ret;
mt6370_chg_pwr_rdy_check(priv);
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,
.driver = {
.name = "mt6370-charger",
.of_match_table = 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");
