[PATCH v2 12/15] power: supply: mt6370: Add Mediatek MT6370 charger driver

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

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 1aa8323ad9f6..54d8c3ab01cc 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 7f02f36aea55..8c9527643c86 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 000000000000..539da62df2db --- /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");