diff --git a/Documentation/devicetree/bindings/power/supply/sc89890-charger.txt b/Documentation/devicetree/bindings/power/supply/sc89890-charger.txt new file mode 100644 index 000000000000..3f7caa4a260b --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/sc89890-charger.txt @@ -0,0 +1,40 @@ +Binding for sc8990 Li-Ion Charger + +This driver will support the sc89890. There are +other ICs in the same family but those have not been tested. + +Required properties: +- compatible: "sc,sc89890" +- reg: integer, i2c address of the device. +- interrupts: interrupt line; +- sc,battery-regulation-voltage: integer, maximum charging voltage (in uV); +- sc,charge-current: integer, maximum charging current (in uA); +- sc,termination-current: integer, charge will be terminated when current in + constant-voltage phase drops below this value (in uA); +- sc,precharge-current: integer, maximum charge current during precharge + phase (in uA); +- sc,minimum-sys-voltage: integer, when battery is charging and it is below + minimum system voltage, the system will be regulated above + minimum-sys-voltage setting (in uV); +- sc,boost-voltage: integer, VBUS voltage level in boost mode (in uV); +- sc,boost-max-current: integer, maximum allowed current draw in boost mode + (in uA). + +Example: + +sc89890 { + compatible = "sc,sc89890"; + reg = <0x6a>; + + interrupt-parent = <&gpio0>; + interrupts = ; + + sc,battery-regulation-voltage = <4200000>; + sc,charge-current = <1000000>; + sc,termination-current = <50000>; + sc,precharge-current = <128000>; + sc,minimum-sys-voltage = <3600000>; + sc,boost-voltage = <5000000>; + sc,boost-max-current = <1000000>; + sc,ibatcomp-micro-ohms = <10>; +}; diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index f8936eec3ee5..2c47b0403283 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -542,6 +542,14 @@ config CHARGER_SC8551 help Say Y to enable support for the SC8551 battery pump charger. +config CHARGER_SC89890 + tristate "SC89890 battery charger driver" + depends on I2C + depends on GPIOLIB || COMPILE_TEST + select REGMAP_I2C + help + Say Y to enable support for the SC89890 battery charger. + config CHARGER_MAX14577 tristate "Maxim MAX14577/77836 battery charger driver" depends on MFD_MAX14577 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 7c6158473764..a700f1d988d2 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -90,6 +90,7 @@ obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o obj-$(CONFIG_CHARGER_BQ25980) += bq25980_charger.o obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o obj-$(CONFIG_CHARGER_SC8551) += sc8551_charger.o +obj-$(CONFIG_CHARGER_SC89890) += sc89890_charger.o obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o obj-$(CONFIG_CHARGER_TPS65217) += tps65217_charger.o obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o diff --git a/drivers/power/supply/sc89890_charger.c b/drivers/power/supply/sc89890_charger.c new file mode 100644 index 000000000000..dfaa960335d3 --- /dev/null +++ b/drivers/power/supply/sc89890_charger.c @@ -0,0 +1,1214 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Chrager driver for Sc89890 + * + * Copyright (c) 2022 Rockchip Electronics Co., Ltd. + * + * Author: Xu Shengfei + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Module parameters. */ +static int debug; +module_param_named(debug, debug, int, 0644); +MODULE_PARM_DESC(debug, "Set to one to enable debugging messages."); + +#define DBG(args...) \ + do { \ + if (debug) { \ + pr_info(args); \ + } \ + } while (0) + +#define SC89890_MANUFACTURER "SOUTHCHIP" +#define SC89890_IRQ "sc89890_irq" +#define SC89890_ID 4 +#define SC89890_DEBUG_BUF_LEN 30 +enum sc89890_fields { + F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */ + F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */ + F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN, + F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */ + F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, + F_MIN_VBAT_SEL, /* Reg03 */ + F_PUMPX_EN, F_ICHG, /* Reg04 */ + F_IPRECHG, F_ITERM, /* Reg05 */ + F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */ + F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR, + F_JEITA_ISET, /* Reg07 */ + F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */ + F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET, + F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */ + F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */ + F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD, + F_VSYS_STAT, /* Reg0B */ + F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT, + F_NTC_FAULT, /* Reg0C */ + F_FORCE_VINDPM, F_VINDPM, /* Reg0D */ + F_THERM_STAT, F_BATV, /* Reg0E */ + F_SYSV, /* Reg0F */ + F_TSPCT, /* Reg10 */ + F_VBUS_GD, F_VBUSV, /* Reg11 */ + F_ICHGR, /* Reg12 */ + F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */ + F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */ + + F_MAX_FIELDS +}; + +/* initial field values, converted to register values */ +struct sc89890_init_data { + u8 ichg; /* charge current */ + u8 vreg; /* regulation voltage */ + u8 iterm; /* termination current */ + u8 iprechg; /* precharge current */ + u8 sysvmin; /* minimum system voltage limit */ + u8 boostv; /* boost regulation voltage */ + u8 boosti; /* boost current limit */ + u8 boostf; /* boost frequency */ + u8 ilim_en; /* enable ILIM pin */ + u8 treg; /* thermal regulation threshold */ + u8 rbatcomp; /* IBAT sense resistor value */ + u8 vclamp; /* IBAT compensation voltage limit */ +}; + +struct sc89890_state { + u8 online; + u8 chrg_status; + u8 chrg_fault; + u8 vsys_status; + u8 boost_fault; + u8 bat_fault; +}; + +struct sc89890_device { + struct i2c_client *client; + struct device *dev; + struct power_supply *charger; + + struct regulator_dev *otg_vbus_reg; + unsigned long usb_event; + + struct regmap *rmap; + struct regmap_field *rmap_fields[F_MAX_FIELDS]; + + struct sc89890_init_data init_data; + struct sc89890_state state; + + struct mutex lock; /* protect state data */ +}; + +static const struct regmap_range sc89890_readonly_reg_ranges[] = { + regmap_reg_range(0x0b, 0x0c), + regmap_reg_range(0x0e, 0x13), +}; + +static const struct regmap_access_table sc89890_writeable_regs = { + .no_ranges = sc89890_readonly_reg_ranges, + .n_no_ranges = ARRAY_SIZE(sc89890_readonly_reg_ranges), +}; + +static const struct regmap_range sc89890_volatile_reg_ranges[] = { + regmap_reg_range(0x00, 0x00), + regmap_reg_range(0x02, 0x02), + regmap_reg_range(0x09, 0x09), + regmap_reg_range(0x0b, 0x0b), + regmap_reg_range(0x0c, 0x0c), + regmap_reg_range(0x0d, 0x14), +}; + +static const struct regmap_access_table sc89890_volatile_regs = { + .yes_ranges = sc89890_volatile_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(sc89890_volatile_reg_ranges), +}; + +static const struct regmap_config sc89890_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = 0x14, + .cache_type = REGCACHE_RBTREE, + + .wr_table = &sc89890_writeable_regs, + .volatile_table = &sc89890_volatile_regs, +}; + +static const struct reg_field sc89890_reg_fields[] = { + /* REG00 */ + [F_EN_HIZ] = REG_FIELD(0x00, 7, 7), + [F_EN_ILIM] = REG_FIELD(0x00, 6, 6), + [F_IILIM] = REG_FIELD(0x00, 0, 5), + /* REG01 */ + [F_BHOT] = REG_FIELD(0x01, 6, 7), + [F_BCOLD] = REG_FIELD(0x01, 5, 5), + [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4), + /* REG02 */ + [F_CONV_START] = REG_FIELD(0x02, 7, 7), + [F_CONV_RATE] = REG_FIELD(0x02, 6, 6), + [F_BOOSTF] = REG_FIELD(0x02, 5, 5), + [F_ICO_EN] = REG_FIELD(0x02, 4, 4), + [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), + [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), + [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1), + [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0), + /* REG03 */ + [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7), + [F_WD_RST] = REG_FIELD(0x03, 6, 6), + [F_OTG_CFG] = REG_FIELD(0x03, 5, 5), + [F_CHG_CFG] = REG_FIELD(0x03, 4, 4), + [F_SYSVMIN] = REG_FIELD(0x03, 1, 3), + [F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), + /* REG04 */ + [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7), + [F_ICHG] = REG_FIELD(0x04, 0, 6), + /* REG05 */ + [F_IPRECHG] = REG_FIELD(0x05, 4, 7), + [F_ITERM] = REG_FIELD(0x05, 0, 3), + /* REG06 */ + [F_VREG] = REG_FIELD(0x06, 2, 7), + [F_BATLOWV] = REG_FIELD(0x06, 1, 1), + [F_VRECHG] = REG_FIELD(0x06, 0, 0), + /* REG07 */ + [F_TERM_EN] = REG_FIELD(0x07, 7, 7), + [F_STAT_DIS] = REG_FIELD(0x07, 6, 6), + [F_WD] = REG_FIELD(0x07, 4, 5), + [F_TMR_EN] = REG_FIELD(0x07, 3, 3), + [F_CHG_TMR] = REG_FIELD(0x07, 1, 2), + [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), + /* REG08 */ + [F_BATCMP] = REG_FIELD(0x08, 5, 7), + [F_VCLAMP] = REG_FIELD(0x08, 2, 4), + [F_TREG] = REG_FIELD(0x08, 0, 1), + /* REG09 */ + [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7), + [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6), + [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5), + [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), + [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3), + [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2), + [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1), + [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0), + /* REG0A */ + [F_BOOSTV] = REG_FIELD(0x0A, 4, 7), + [F_BOOSTI] = REG_FIELD(0x0A, 0, 2), + [F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), + /* REG0B */ + [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7), + [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4), + [F_PG_STAT] = REG_FIELD(0x0B, 2, 2), + [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), + [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0), + /* REG0C */ + [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7), + [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6), + [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5), + [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3), + [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2), + /* REG0D */ + [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7), + [F_VINDPM] = REG_FIELD(0x0D, 0, 6), + /* REG0E */ + [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7), + [F_BATV] = REG_FIELD(0x0E, 0, 6), + /* REG0F */ + [F_SYSV] = REG_FIELD(0x0F, 0, 6), + /* REG10 */ + [F_TSPCT] = REG_FIELD(0x10, 0, 6), + /* REG11 */ + [F_VBUS_GD] = REG_FIELD(0x11, 7, 7), + [F_VBUSV] = REG_FIELD(0x11, 0, 6), + /* REG12 */ + [F_ICHGR] = REG_FIELD(0x12, 0, 6), + /* REG13 */ + [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7), + [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6), + [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5), + /* REG14 */ + [F_REG_RST] = REG_FIELD(0x14, 7, 7), + [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6), + [F_PN] = REG_FIELD(0x14, 3, 5), + [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2), + [F_DEV_REV] = REG_FIELD(0x14, 0, 1) +}; + +enum sc89890_status { + STATUS_NOT_CHARGING, + STATUS_PRE_CHARGING, + STATUS_FAST_CHARGING, + STATUS_TERMINATION_DONE, +}; + +enum sc89890_chrg_fault { + CHRG_FAULT_NORMAL, + CHRG_FAULT_INPUT, + CHRG_FAULT_THERMAL_SHUTDOWN, + CHRG_FAULT_TIMER_EXPIRED, +}; + +/* + * Most of the val -> idx conversions can be computed, given the minimum, + * maximum and the step between values. For the rest of conversions, we use + * lookup tables. + */ +enum sc89890_table_ids { + /* range tables */ + TBL_ICHG, + TBL_ITERM, + TBL_IILIM, + TBL_VREG, + TBL_BOOSTV, + TBL_SYSVMIN, + TBL_VBATCOMP, + TBL_RBATCOMP, + + /* lookup tables */ + TBL_TREG, + TBL_BOOSTI, +}; + +/* Thermal Regulation Threshold lookup table, in degrees Celsius */ +static const u32 sc89890_treg_tbl[] = { 60, 80, 100, 120 }; + +#define SC89890_TREG_TBL_SIZE ARRAY_SIZE(sc89890_treg_tbl) + +/* Boost mode current limit lookup table, in uA */ +static const u32 sc89890_boosti_tbl[] = { + 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000 +}; + +#define SC89890_BOOSTI_TBL_SIZE ARRAY_SIZE(sc89890_boosti_tbl) + +struct sc89890_range { + u32 min; + u32 max; + u32 step; +}; + +struct sc89890_lookup { + const u32 *tbl; + u32 size; +}; + +static const union { + struct sc89890_range rt; + struct sc89890_lookup lt; +} sc89890_tables[] = { + /* range tables */ + [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ + [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ + [TBL_IILIM] = { .rt = {100000, 3250000, 50000} }, /* uA */ + [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */ + [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */ + [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */ + [TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */ + [TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */ + + /* lookup tables */ + [TBL_TREG] = { .lt = {sc89890_treg_tbl, SC89890_TREG_TBL_SIZE} }, + [TBL_BOOSTI] = { .lt = {sc89890_boosti_tbl, SC89890_BOOSTI_TBL_SIZE} } +}; + +static int sc89890_field_read(struct sc89890_device *sc89890, + enum sc89890_fields field_id) +{ + int ret; + int val; + + ret = regmap_field_read(sc89890->rmap_fields[field_id], &val); + if (ret < 0) + return ret; + + return val; +} + +static int sc89890_field_write(struct sc89890_device *sc89890, + enum sc89890_fields field_id, u8 val) +{ + return regmap_field_write(sc89890->rmap_fields[field_id], val); +} + +static u8 sc89890_find_idx(u32 value, enum sc89890_table_ids id) +{ + u8 idx; + + if (id >= TBL_TREG) { + const u32 *tbl = sc89890_tables[id].lt.tbl; + u32 tbl_size = sc89890_tables[id].lt.size; + + for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++) + ; + } else { + const struct sc89890_range *rtbl = &sc89890_tables[id].rt; + u8 rtbl_size; + + rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1; + + for (idx = 1; + idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value); + idx++) + ; + } + + return idx - 1; +} + +static u32 sc89890_find_val(u8 idx, enum sc89890_table_ids id) +{ + const struct sc89890_range *rtbl; + + /* lookup table? */ + if (id >= TBL_TREG) + return sc89890_tables[id].lt.tbl[idx]; + + /* range table */ + rtbl = &sc89890_tables[id].rt; + + return (rtbl->min + idx * rtbl->step); +} + +static bool sc89890_is_adc_property(enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + case POWER_SUPPLY_PROP_CURRENT_NOW: + return true; + + default: + return false; + } +} + +static int sc89890_get_chip_state(struct sc89890_device *sc89890, + struct sc89890_state *state) +{ + int i, ret; + + struct { + enum sc89890_fields id; + u8 *data; + } state_fields[] = { + {F_CHG_STAT, &state->chrg_status}, + {F_PG_STAT, &state->online}, + {F_VSYS_STAT, &state->vsys_status}, + {F_BOOST_FAULT, &state->boost_fault}, + {F_BAT_FAULT, &state->bat_fault}, + {F_CHG_FAULT, &state->chrg_fault} + }; + + for (i = 0; i < ARRAY_SIZE(state_fields); i++) { + ret = sc89890_field_read(sc89890, state_fields[i].id); + if (ret < 0) + return ret; + + *state_fields[i].data = ret; + } + + DBG("SC89890: S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n", + state->chrg_status, state->online, state->vsys_status, + state->chrg_fault, state->boost_fault, state->bat_fault); + + return 0; +} + +static irqreturn_t __sc89890_handle_irq(struct sc89890_device *sc89890) +{ + struct sc89890_state new_state; + int ret; + + ret = sc89890_get_chip_state(sc89890, &new_state); + if (ret < 0) + return IRQ_NONE; + + if (!memcmp(&sc89890->state, &new_state, sizeof(new_state))) + return IRQ_NONE; + + if (!new_state.online && sc89890->state.online) { /* power removed */ + /* disable ADC */ + ret = sc89890_field_write(sc89890, F_CONV_START, 0); + if (ret < 0) + goto error; + } else if (new_state.online && !sc89890->state.online) { /* power inserted */ + + /* enable ADC, to have control of charge current/voltage */ + ret = sc89890_field_write(sc89890, F_CONV_START, 1); + if (ret < 0) + goto error; + } + + sc89890->state = new_state; + power_supply_changed(sc89890->charger); + + return IRQ_HANDLED; +error: + dev_err(sc89890->dev, "Error communicating with the chip: %pe\n", + ERR_PTR(ret)); + return IRQ_HANDLED; +} + +static int sc89890_power_supply_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct sc89890_device *sc89890 = power_supply_get_drvdata(psy); + struct sc89890_state state; + bool do_adc_conv; + int ret; + + mutex_lock(&sc89890->lock); + /* update state in case we lost an interrupt */ + __sc89890_handle_irq(sc89890); + state = sc89890->state; + do_adc_conv = !state.online && sc89890_is_adc_property(psp); + if (do_adc_conv) + sc89890_field_write(sc89890, F_CONV_START, 1); + mutex_unlock(&sc89890->lock); + + if (do_adc_conv) + regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START], + ret, !ret, 25000, 1000000); + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (!state.online) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (state.chrg_status == STATUS_NOT_CHARGING) + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + else if (state.chrg_status == STATUS_PRE_CHARGING || + state.chrg_status == STATUS_FAST_CHARGING) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (state.chrg_status == STATUS_TERMINATION_DONE) + val->intval = POWER_SUPPLY_STATUS_FULL; + else + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + + break; + + case POWER_SUPPLY_PROP_CHARGE_TYPE: + if (!state.online || state.chrg_status == STATUS_NOT_CHARGING || + state.chrg_status == STATUS_TERMINATION_DONE) + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; + else if (state.chrg_status == STATUS_PRE_CHARGING) + val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD; + else if (state.chrg_status == STATUS_FAST_CHARGING) + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; + else /* unreachable */ + val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + break; + + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = SC89890_MANUFACTURER; + break; + + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = "SC89890"; + break; + + case POWER_SUPPLY_PROP_ONLINE: + val->intval = !!state.chrg_status; + break; + + case POWER_SUPPLY_PROP_HEALTH: + if (!state.chrg_fault && !state.bat_fault && !state.boost_fault) + val->intval = POWER_SUPPLY_HEALTH_GOOD; + else if (state.bat_fault) + val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED) + val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; + else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN) + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; + else + val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + val->intval = sc89890_find_val(sc89890->init_data.ichg, TBL_ICHG); + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + if (!state.online) { + val->intval = 0; + break; + } + + ret = sc89890_field_read(sc89890, F_BATV); /* read measured value */ + if (ret < 0) + return ret; + + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ + val->intval = 2304000 + ret * 20000; + break; + + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + val->intval = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG); + break; + + case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: + val->intval = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM); + break; + + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: + val->intval = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM); + break; + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + ret = sc89890_field_read(sc89890, F_IILIM); + if (ret < 0) + return ret; + + val->intval = sc89890_find_val(ret, TBL_IILIM); + break; + case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: + val->intval = 13500000; /* uV */ + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = sc89890_field_read(sc89890, F_SYSV); /* read measured value */ + if (ret < 0) + return ret; + + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ + val->intval = 2304000 + ret * 20000; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */ + if (ret < 0) + return ret; + + /* converted_val = ADC_val * 50mA (table 10.3.19) */ + val->intval = ret * -50000; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int sc89890_power_supply_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct sc89890_device *sc89890 = power_supply_get_drvdata(psy); + int index, ret; + + switch (psp) { + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + index = sc89890_find_idx(val->intval, TBL_ICHG); + ret = sc89890_field_write(sc89890, F_ICHG, index); + if (ret < 0) + dev_err(sc89890->dev, "set input voltage limit failed\n"); + break; + + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + index = sc89890_find_idx(val->intval, TBL_IILIM); + ret = sc89890_field_write(sc89890, F_IILIM, index); + if (ret < 0) + dev_err(sc89890->dev, "set input current limit failed\n"); + break; + + default: + ret = -EINVAL; + } + + return ret; +} + +static irqreturn_t sc89890_irq_handler_thread(int irq, void *private) +{ + struct sc89890_device *sc89890 = private; + irqreturn_t ret; + + mutex_lock(&sc89890->lock); + ret = __sc89890_handle_irq(sc89890); + mutex_unlock(&sc89890->lock); + + return ret; +} + +static int sc89890_chip_reset(struct sc89890_device *sc89890) +{ + int ret; + int rst_check_counter = 10; + + ret = sc89890_field_write(sc89890, F_REG_RST, 1); + if (ret < 0) + return ret; + + do { + ret = sc89890_field_read(sc89890, F_REG_RST); + if (ret < 0) + return ret; + + usleep_range(5, 10); + } while (ret == 1 && --rst_check_counter); + + if (!rst_check_counter) + return -ETIMEDOUT; + + return 0; +} + +static int sc89890_hw_init(struct sc89890_device *sc89890) +{ + int ret; + int i; + + const struct { + enum sc89890_fields id; + u32 value; + } init_data[] = { + {F_ICHG, sc89890->init_data.ichg}, + {F_VREG, sc89890->init_data.vreg}, + {F_ITERM, sc89890->init_data.iterm}, + {F_IPRECHG, sc89890->init_data.iprechg}, + {F_SYSVMIN, sc89890->init_data.sysvmin}, + {F_BOOSTV, sc89890->init_data.boostv}, + {F_BOOSTI, sc89890->init_data.boosti}, + {F_BOOSTF, sc89890->init_data.boostf}, + {F_EN_ILIM, sc89890->init_data.ilim_en}, + {F_TREG, sc89890->init_data.treg}, + {F_BATCMP, sc89890->init_data.rbatcomp}, + {F_VCLAMP, sc89890->init_data.vclamp}, + }; + + ret = sc89890_chip_reset(sc89890); + if (ret < 0) { + dev_dbg(sc89890->dev, "Reset failed %d\n", ret); + return ret; + } + + /* disable watchdog */ + ret = sc89890_field_write(sc89890, F_WD, 0); + if (ret < 0) { + dev_dbg(sc89890->dev, "Disabling watchdog failed %d\n", ret); + return ret; + } + + /* initialize currents/voltages and other parameters */ + for (i = 0; i < ARRAY_SIZE(init_data); i++) { + ret = sc89890_field_write(sc89890, init_data[i].id, + init_data[i].value); + if (ret < 0) { + dev_dbg(sc89890->dev, "Writing init data failed %d\n", ret); + return ret; + } + } + + /* Configure ADC for continuous conversions when charging */ + ret = sc89890_field_write(sc89890, F_CONV_RATE, !!sc89890->state.online); + if (ret < 0) { + dev_err(sc89890->dev, "Config ADC failed %d\n", ret); + return ret; + } + + ret = sc89890_field_write(sc89890, F_AUTO_DPDM_EN, 0); + if (ret < 0) { + dev_err(sc89890->dev, "Config F_AUTO_DPDM_EN failed %d\n", ret); + return ret; + } + + ret = sc89890_field_write(sc89890, F_HVDCP_EN, 0); + if (ret < 0) { + dev_err(sc89890->dev, "Config F_HVDCP_EN failed %d\n", ret); + return ret; + } + + ret = sc89890_get_chip_state(sc89890, &sc89890->state); + if (ret < 0) { + dev_err(sc89890->dev, "Get state failed %d\n", ret); + return ret; + } + + return 0; +} + +static const enum power_supply_property sc89890_power_supply_props[] = { + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, + POWER_SUPPLY_PROP_PRECHARGE_CURRENT, + POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, + POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, +}; + +static char *sc89890_charger_supplied_to[] = { + "usb", +}; + +static const struct power_supply_desc sc89890_power_supply_desc = { + .name = "sc89890-charger", + .type = POWER_SUPPLY_TYPE_USB, + .properties = sc89890_power_supply_props, + .num_properties = ARRAY_SIZE(sc89890_power_supply_props), + .set_property = sc89890_power_supply_set_property, + .get_property = sc89890_power_supply_get_property, +}; + +static int sc89890_power_supply_init(struct sc89890_device *sc89890) +{ + struct power_supply_config psy_cfg = { .drv_data = sc89890, }; + + psy_cfg.of_node = sc89890->dev->of_node; + psy_cfg.supplied_to = sc89890_charger_supplied_to; + psy_cfg.num_supplicants = ARRAY_SIZE(sc89890_charger_supplied_to); + + sc89890->charger = devm_power_supply_register(sc89890->dev, + &sc89890_power_supply_desc, + &psy_cfg); + + if (PTR_ERR_OR_ZERO(sc89890->charger)) { + dev_err(sc89890->dev, "failed to register power supply\n"); + return PTR_ERR(sc89890->charger); + } + + return 0; +} + +static int sc89890_get_chip_version(struct sc89890_device *sc89890) +{ + int id; + + id = sc89890_field_read(sc89890, F_PN); + if (id < 0) { + dev_err(sc89890->dev, "Cannot read chip ID.\n"); + return id; + } else if (id != SC89890_ID) { + dev_err(sc89890->dev, "Unknown chip ID %d\n", id); + return -ENODEV; + } + + DBG("charge IC: SC89890\n"); + + return 0; +} + +static void sc89890_set_otg_vbus(struct sc89890_device *sc, bool enable) +{ + sc89890_field_write(sc, F_OTG_CFG, enable); +} + +static int sc89890_otg_vbus_enable(struct regulator_dev *dev) +{ + struct sc89890_device *sc = rdev_get_drvdata(dev); + + sc89890_set_otg_vbus(sc, true); + + return 0; +} + +static int sc89890_otg_vbus_disable(struct regulator_dev *dev) +{ + struct sc89890_device *sc = rdev_get_drvdata(dev); + + sc89890_set_otg_vbus(sc, false); + + return 0; +} + +static int sc89890_otg_vbus_is_enabled(struct regulator_dev *dev) +{ + struct sc89890_device *sc = rdev_get_drvdata(dev); + u8 val; + + val = sc89890_field_read(sc, F_OTG_CFG); + + return val; +} + +static const struct regulator_ops sc89890_otg_vbus_ops = { + .enable = sc89890_otg_vbus_enable, + .disable = sc89890_otg_vbus_disable, + .is_enabled = sc89890_otg_vbus_is_enabled, +}; + +static const struct regulator_desc sc89890_otg_vbus_desc = { + .name = "otg-vbus", + .of_match = "otg-vbus", + .regulators_node = of_match_ptr("regulators"), + .owner = THIS_MODULE, + .ops = &sc89890_otg_vbus_ops, + .type = REGULATOR_VOLTAGE, + .fixed_uV = 5000000, + .n_voltages = 1, +}; + +static int sc89890_register_otg_vbus_regulator(struct sc89890_device *sc) +{ + struct regulator_config config = { }; + struct device_node *np; + + np = of_get_child_by_name(sc->dev->of_node, "regulators"); + if (!np) { + dev_warn(sc->dev, "cannot find regulators node\n"); + return -ENXIO; + } + + config.dev = sc->dev; + config.driver_data = sc; + + sc->otg_vbus_reg = devm_regulator_register(sc->dev, + &sc89890_otg_vbus_desc, + &config); + if (IS_ERR(sc->otg_vbus_reg)) + return PTR_ERR(sc->otg_vbus_reg); + + return 0; +} + +static ssize_t registers_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sc89890_device *sc89890 = dev_get_drvdata(dev); + u8 tmpbuf[SC89890_DEBUG_BUF_LEN]; + int idx = 0; + u8 addr; + int val; + int len; + int ret; + + sc89890_field_write(sc89890, F_CONV_START, 1); + + regmap_field_read_poll_timeout(sc89890->rmap_fields[F_CONV_START], + ret, !ret, 25000, 1000000); + + for (addr = 0x0; addr <= 0x14; addr++) { + ret = regmap_read(sc89890->rmap, addr, &val); + if (ret == 0) { + len = snprintf(tmpbuf, SC89890_DEBUG_BUF_LEN, + "Reg[%.2X] = 0x%.2x\n", addr, val); + memcpy(&buf[idx], tmpbuf, len); + idx += len; + } + } + + val = sc89890_find_val(sc89890->init_data.vreg, TBL_VREG); + pr_info("CHARGE_VOLTAGE_MAX: %d\n", val / 1000); + + val = sc89890_find_val(sc89890->init_data.iprechg, TBL_ITERM); + pr_info("PRECHARGE_CURRENT: %d\n", val / 1000); + + val = sc89890_find_val(sc89890->init_data.iterm, TBL_ITERM); + pr_info("CHARGE_TERM_CURRENT: %d\n", val / 1000); + + ret = sc89890_field_read(sc89890, F_BATV); /* read measured value */ + if (ret) + dev_err(dev, "read F_BAT error!\n"); + else { + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ + val = 2304000 + ret * 20000; + pr_info("charge voltage: %d\n", val / 1000); + } + + ret = sc89890_field_read(sc89890, F_IILIM); + if (ret) + dev_err(dev, "read F_IILIM error!\n"); + else { + val = sc89890_find_val(ret, TBL_IILIM); + pr_info("INPUT_CURRENT_LIMIT: %d\n", val / 1000); + } + ret = sc89890_field_read(sc89890, F_SYSV); /* read measured value */ + if (ret) + dev_err(dev, "read F_SYSV error!\n"); + else { + /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */ + val = 2304000 + ret * 20000; + pr_info("VOLTAGE_NOW: %d\n", val / 1000); + } + ret = sc89890_field_read(sc89890, F_ICHGR); /* read measured value */ + if (ret) + dev_err(dev, "read F_ICHRG error!\n"); + else { + /* converted_val = ADC_val * 50mA (table 10.3.19) */ + val = ret * -50000; + pr_info("CURRENT_NOW: %d\n", val / 1000); + } + return idx; +} + +static ssize_t registers_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sc89890_device *sc89890 = dev_get_drvdata(dev); + int ret; + unsigned int reg; + int val; + + ret = sscanf(buf, "%x %x", ®, &val); + if (ret == 2 && reg <= 0x14) + regmap_write(sc89890->rmap, (unsigned char)reg, val); + + return count; +} + +static DEVICE_ATTR_RW(registers); + +static void sc89890_create_device_node(struct device *dev) +{ + device_create_file(dev, &dev_attr_registers); +} + +static int sc89890_fw_read_u32_props(struct sc89890_device *sc89890) +{ + struct sc89890_init_data *init = &sc89890->init_data; + u32 property; + int ret; + int i; + struct { + char *name; + bool optional; + enum sc89890_table_ids tbl_id; + u8 *conv_data; /* holds converted value from given property */ + } props[] = { + /* required properties */ + {"sc,charge-current", false, TBL_ICHG, &init->ichg}, + {"sc,battery-regulation-voltage", false, TBL_VREG, &init->vreg}, + {"sc,termination-current", false, TBL_ITERM, &init->iterm}, + {"sc,precharge-current", false, TBL_ITERM, &init->iprechg}, + {"sc,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin}, + {"sc,boost-voltage", false, TBL_BOOSTV, &init->boostv}, + {"sc,boost-max-current", false, TBL_BOOSTI, &init->boosti}, + + /* optional properties */ + {"sc,thermal-regulation-threshold", true, TBL_TREG, &init->treg}, + {"sc,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp}, + {"sc,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp}, + }; + + /* initialize data for optional properties */ + init->treg = 3; /* 120 degrees Celsius */ + init->rbatcomp = 0; + init->vclamp = 0; /* IBAT compensation disabled */ + + for (i = 0; i < ARRAY_SIZE(props); i++) { + ret = device_property_read_u32(sc89890->dev, + props[i].name, + &property); + if (ret < 0) { + if (props[i].optional) + continue; + + dev_err(sc89890->dev, "Unable to read property %d %s\n", ret, + props[i].name); + + return ret; + } + + *props[i].conv_data = sc89890_find_idx(property, + props[i].tbl_id); + } + + return 0; +} + +static int sc89890_fw_probe(struct sc89890_device *sc89890) +{ + int ret; + struct sc89890_init_data *init = &sc89890->init_data; + + ret = sc89890_fw_read_u32_props(sc89890); + if (ret < 0) + return ret; + + init->ilim_en = device_property_read_bool(sc89890->dev, "sc,use-ilim-pin"); + init->boostf = device_property_read_bool(sc89890->dev, "sc,boost-low-freq"); + + return 0; +} + +static int sc89890_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct sc89890_device *sc89890; + int ret; + int i; + + sc89890 = devm_kzalloc(dev, sizeof(*sc89890), GFP_KERNEL); + if (!sc89890) + return -ENOMEM; + + sc89890->client = client; + sc89890->dev = dev; + + mutex_init(&sc89890->lock); + sc89890->rmap = devm_regmap_init_i2c(client, &sc89890_regmap_config); + if (IS_ERR(sc89890->rmap)) { + dev_err(dev, "failed to allocate register map\n"); + return PTR_ERR(sc89890->rmap); + } + + for (i = 0; i < ARRAY_SIZE(sc89890_reg_fields); i++) { + const struct reg_field *reg_fields = sc89890_reg_fields; + + sc89890->rmap_fields[i] = devm_regmap_field_alloc(dev, + sc89890->rmap, + reg_fields[i]); + if (IS_ERR(sc89890->rmap_fields[i])) { + dev_err(dev, "cannot allocate regmap field\n"); + return PTR_ERR(sc89890->rmap_fields[i]); + } + } + + i2c_set_clientdata(client, sc89890); + + ret = sc89890_get_chip_version(sc89890); + if (ret) { + dev_err(dev, "Cannot read chip ID or unknown chip.\n"); + return ret; + } + + ret = sc89890_power_supply_init(sc89890); + if (ret < 0) { + dev_err(dev, "Failed to register power supply\n"); + goto irq_fail; + } + + if (!dev->platform_data) { + ret = sc89890_fw_probe(sc89890); + if (ret < 0) { + dev_err(dev, "Cannot read device properties.\n"); + return ret; + } + } else { + return -ENODEV; + } + + ret = sc89890_hw_init(sc89890); + if (ret < 0) { + dev_err(dev, "Cannot initialize the chip.\n"); + return ret; + } + + + if (client->irq < 0) { + dev_err(dev, "No irq resource found.\n"); + return client->irq; + } + + ret = devm_request_threaded_irq(dev, client->irq, NULL, + sc89890_irq_handler_thread, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + SC89890_IRQ, sc89890); + if (ret) + goto irq_fail; + + sc89890_register_otg_vbus_regulator(sc89890); + sc89890_create_device_node(sc89890->dev); + + return 0; + +irq_fail: + + return ret; +} + +static int sc89890_remove(struct i2c_client *client) +{ + struct sc89890_device *sc89890 = i2c_get_clientdata(client); + + /* reset all registers to default values */ + sc89890_chip_reset(sc89890); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int sc89890_suspend(struct device *dev) +{ + struct sc89890_device *sc89890 = dev_get_drvdata(dev); + + /* + * If charger is removed, while in suspend, make sure ADC is disabled + * since it consumes slightly more power. + */ + return sc89890_field_write(sc89890, F_CONV_RATE, 0); +} + +static int sc89890_resume(struct device *dev) +{ + int ret; + struct sc89890_device *sc89890 = dev_get_drvdata(dev); + + mutex_lock(&sc89890->lock); + + ret = sc89890_get_chip_state(sc89890, &sc89890->state); + if (ret < 0) + goto unlock; + + /* Re-enable ADC only if charger is plugged in. */ + if (sc89890->state.online) { + ret = sc89890_field_write(sc89890, F_CONV_RATE, 1); + if (ret < 0) + goto unlock; + } + + /* signal userspace, maybe state changed while suspended */ + power_supply_changed(sc89890->charger); + +unlock: + mutex_unlock(&sc89890->lock); + + return ret; +} +#endif + +static const struct dev_pm_ops sc89890_pm = { + SET_SYSTEM_SLEEP_PM_OPS(sc89890_suspend, sc89890_resume) +}; + +static const struct i2c_device_id sc89890_i2c_ids[] = { + { "sc89890", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, sc89890_i2c_ids); + +static const struct of_device_id sc89890_of_match[] = { + { .compatible = "sc,sc89890", }, + { }, +}; +MODULE_DEVICE_TABLE(of, sc89890_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id sc89890_acpi_match[] = { + {"SC898900", 0}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, sc89890_acpi_match); +#endif + +static struct i2c_driver sc89890_driver = { + .driver = { + .name = "sc89890-charger", + .of_match_table = of_match_ptr(sc89890_of_match), + .acpi_match_table = ACPI_PTR(sc89890_acpi_match), + .pm = &sc89890_pm, + }, + .probe = sc89890_probe, + .remove = sc89890_remove, + .id_table = sc89890_i2c_ids, +}; +module_i2c_driver(sc89890_driver); + +MODULE_AUTHOR("xsf"); +MODULE_DESCRIPTION("sc89890 charger driver"); +MODULE_LICENSE("GPL");