Should this link.... > More details about the chip can be found here: > http://www.ti.com/product/bq25890 > @@ -0,0 +1,998 @@ > +/* > + * TI BQ25890 charger driver > + * > + * Copyright (C) 2015 Intel Corporation > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + */ Go here? Pavel > + > +#include <linux/module.h> > +#include <linux/i2c.h> > +#include <linux/power_supply.h> > +#include <linux/regmap.h> > +#include <linux/types.h> > +#include <linux/gpio/consumer.h> > +#include <linux/interrupt.h> > +#include <linux/delay.h> > +#include <linux/usb/phy.h> > + > +#include <linux/acpi.h> > +#include <linux/of.h> > + > +#define BQ25890_MANUFACTURER "Texas Instruments" > +#define BQ25890_IRQ_PIN "bq25890_irq" > + > +#define BQ25890_ID 3 > + > +enum bq25890_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, /* 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_BOOSTI, /* Reg0A */ > + F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, 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 bq25890_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 */ > +}; > + > +struct bq25890_state { > + u8 online; > + u8 chrg_status; > + u8 chrg_fault; > + u8 vsys_status; > + u8 boost_fault; > + u8 bat_fault; > +}; > + > +struct bq25890_device { > + struct i2c_client *client; > + struct device *dev; > + struct power_supply *charger; > + > + struct usb_phy *usb_phy; > + struct notifier_block usb_nb; > + struct work_struct usb_work; > + unsigned long usb_event; > + > + struct regmap *rmap; > + struct regmap_field *rmap_fields[F_MAX_FIELDS]; > + > + u8 chip_id; > + struct bq25890_init_data init_data; > + struct bq25890_state state; > + > + struct mutex lock; /* protect state data */ > +}; > + > +static const struct regmap_range bq25890_readonly_reg_ranges[] = { > + regmap_reg_range(0x0b, 0x0c), > + regmap_reg_range(0x0e, 0x13), > +}; > + > +static const struct regmap_access_table bq25890_writeable_regs = { > + .no_ranges = bq25890_readonly_reg_ranges, > + .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges), > +}; > + > +static const struct regmap_range bq25890_volatile_reg_ranges[] = { > + regmap_reg_range(0x00, 0x00), > + regmap_reg_range(0x09, 0x09), > + regmap_reg_range(0x0b, 0x0c), > + regmap_reg_range(0x0e, 0x14), > +}; > + > +static const struct regmap_access_table bq25890_volatile_regs = { > + .yes_ranges = bq25890_volatile_reg_ranges, > + .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges), > +}; > + > +static const struct regmap_config bq25890_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + > + .max_register = 0x14, > + .cache_type = REGCACHE_RBTREE, > + > + .wr_table = &bq25890_writeable_regs, > + .volatile_table = &bq25890_volatile_regs, > +}; > + > +static const struct reg_field bq25890_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), > + /* 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, 6, 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), > + /* 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) > +}; > + > +/* > + * 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 bq25890_table_ids { > + /* range tables */ > + TBL_ICHG, > + TBL_ITERM, > + TBL_IPRECHG, > + TBL_VREG, > + TBL_BATCMP, > + TBL_VCLAMP, > + TBL_BOOSTV, > + TBL_SYSVMIN, > + > + /* lookup tables */ > + TBL_TREG, > + TBL_BOOSTI, > +}; > + > +/* Thermal Regulation Threshold lookup table, in degrees Celsius */ > +static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 }; > + > +#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl) > + > +/* Boost mode current limit lookup table, in uA */ > +static const u32 bq25890_boosti_tbl[] = { > + 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000 > +}; > + > +#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl) > + > +struct bq25890_range { > + u32 min; > + u32 max; > + u32 step; > +}; > + > +struct bq25890_lookup { > + const u32 *tbl; > + u32 size; > +}; > + > +static const union { > + struct bq25890_range rt; > + struct bq25890_lookup lt; > +} bq25890_tables[] = { > + /* range tables */ > + [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ > + [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ > + [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */ > + [TBL_BATCMP] = { .rt = {0, 140, 20} }, /* mOhm */ > + [TBL_VCLAMP] = { .rt = {0, 224000, 32000} }, /* uV */ > + [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */ > + [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */ > + > + /* lookup tables */ > + [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} }, > + [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} } > +}; > + > +static int bq25890_field_read(struct bq25890_device *bq, > + enum bq25890_fields field_id) > +{ > + int ret; > + int val; > + > + ret = regmap_field_read(bq->rmap_fields[field_id], &val); > + if (ret < 0) > + return ret; > + > + return val; > +} > + > +static int bq25890_field_write(struct bq25890_device *bq, > + enum bq25890_fields field_id, u8 val) > +{ > + return regmap_field_write(bq->rmap_fields[field_id], val); > +} > + > +static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id) > +{ > + u8 idx; > + > + if (id >= TBL_TREG) { > + const u32 *tbl = bq25890_tables[id].lt.tbl; > + u32 tbl_size = bq25890_tables[id].lt.size; > + > + for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++) > + ; > + } else { > + const struct bq25890_range *rtbl = &bq25890_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 bq25890_find_val(u8 idx, enum bq25890_table_ids id) > +{ > + const struct bq25890_range *rtbl; > + > + /* lookup table? */ > + if (id >= TBL_TREG) > + return bq25890_tables[id].lt.tbl[idx]; > + > + /* range table */ > + rtbl = &bq25890_tables[id].rt; > + > + return(rtbl->min + idx * rtbl->step); > +} > + > +enum bq25890_status { > + STATUS_NOT_CHARGING, > + STATUS_PRE_CHARGING, > + STATUS_FAST_CHARGING, > + STATUS_TERMINATION_DONE, > +}; > + > +enum bq25890_chrg_fault { > + CHRG_FAULT_NORMAL, > + CHRG_FAULT_INPUT, > + CHRG_FAULT_THERMAL_SHUTDOWN, > + CHRG_FAULT_TIMER_EXPIRED, > +}; > + > +static int bq25890_power_supply_get_property(struct power_supply *psy, > + enum power_supply_property psp, > + union power_supply_propval *val) > +{ > + int ret; > + struct bq25890_device *bq = power_supply_get_drvdata(psy); > + struct bq25890_state state; > + > + mutex_lock(&bq->lock); > + state = bq->state; > + mutex_unlock(&bq->lock); > + > + 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_MANUFACTURER: > + val->strval = BQ25890_MANUFACTURER; > + break; > + > + case POWER_SUPPLY_PROP_ONLINE: > + val->intval = state.online; > + 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: > + ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */ > + if (ret < 0) > + return ret; > + > + /* converted_val = ADC_val * 50mA (table 10.3.19) */ > + val->intval = ret * 50000; > + break; > + > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: > + val->intval = bq25890_tables[TBL_ICHG].rt.max; > + break; > + > + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: > + if (!state.online) { > + val->intval = 0; > + break; > + } > + > + ret = bq25890_field_read(bq, 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 = bq25890_tables[TBL_VREG].rt.max; > + break; > + > + case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: > + val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM); > + break; > + > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int bq25890_get_chip_state(struct bq25890_device *bq, > + struct bq25890_state *state) > +{ > + int i, ret; > + > + struct { > + enum bq25890_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 = bq25890_field_read(bq, state_fields[i].id); > + if (ret < 0) > + return ret; > + > + *state_fields[i].data = ret; > + } > + > + dev_dbg(bq->dev, "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 bool bq25890_state_changed(struct bq25890_device *bq, > + struct bq25890_state *new_state) > +{ > + struct bq25890_state old_state; > + > + mutex_lock(&bq->lock); > + old_state = bq->state; > + mutex_unlock(&bq->lock); > + > + return (old_state.chrg_status != new_state->chrg_status || > + old_state.chrg_fault != new_state->chrg_fault || > + old_state.online != new_state->online || > + old_state.bat_fault != new_state->bat_fault || > + old_state.boost_fault != new_state->boost_fault || > + old_state.vsys_status != new_state->vsys_status); > +} > + > +static void bq25890_handle_state_change(struct bq25890_device *bq, > + struct bq25890_state *new_state) > +{ > + int ret; > + struct bq25890_state old_state; > + > + mutex_lock(&bq->lock); > + old_state = bq->state; > + mutex_unlock(&bq->lock); > + > + if (!new_state->online) { /* power removed */ > + /* disable ADC */ > + ret = bq25890_field_write(bq, F_CONV_START, 0); > + if (ret < 0) > + goto error; > + } else if (!old_state.online) { /* power inserted */ > + /* enable ADC, to have control of charge current/voltage */ > + ret = bq25890_field_write(bq, F_CONV_START, 1); > + if (ret < 0) > + goto error; > + } > + > + return; > + > +error: > + dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__); > +} > + > +static irqreturn_t bq25890_irq_handler_thread(int irq, void *private) > +{ > + struct bq25890_device *bq = private; > + int ret; > + struct bq25890_state state; > + > + ret = bq25890_get_chip_state(bq, &state); > + if (ret < 0) > + goto handled; > + > + if (!bq25890_state_changed(bq, &state)) > + goto handled; > + > + bq25890_handle_state_change(bq, &state); > + > + mutex_lock(&bq->lock); > + bq->state = state; > + mutex_unlock(&bq->lock); > + > + power_supply_changed(bq->charger); > + > +handled: > + return IRQ_HANDLED; > +} > + > +static int bq25890_chip_reset(struct bq25890_device *bq) > +{ > + int ret; > + > + ret = bq25890_field_write(bq, F_REG_RST, 1); > + if (ret < 0) > + return ret; > + > + do { > + ret = bq25890_field_read(bq, F_REG_RST); > + if (ret < 0) > + return ret; > + > + usleep_range(5, 10); > + } while (ret == 1); > + > + return 0; > +} > + > +static int bq25890_hw_init(struct bq25890_device *bq) > +{ > + int ret; > + int i; > + struct bq25890_state state; > + > + const struct { > + enum bq25890_fields id; > + u32 value; > + } init_data[] = { > + {F_ICHG, bq->init_data.ichg}, > + {F_VREG, bq->init_data.vreg}, > + {F_ITERM, bq->init_data.iterm}, > + {F_IPRECHG, bq->init_data.iprechg}, > + {F_SYSVMIN, bq->init_data.sysvmin}, > + {F_BOOSTV, bq->init_data.boostv}, > + {F_BOOSTI, bq->init_data.boosti}, > + {F_BOOSTF, bq->init_data.boostf}, > + {F_EN_ILIM, bq->init_data.ilim_en}, > + {F_TREG, bq->init_data.treg} > + }; > + > + ret = bq25890_chip_reset(bq); > + if (ret < 0) > + return ret; > + > + /* disable watchdog */ > + ret = bq25890_field_write(bq, F_WD, 0); > + if (ret < 0) > + return ret; > + > + /* initialize currents/voltages and other parameters */ > + for (i = 0; i < ARRAY_SIZE(init_data); i++) { > + ret = bq25890_field_write(bq, init_data[i].id, > + init_data[i].value); > + if (ret < 0) > + return ret; > + } > + > + /* Configure ADC for continuous conversions. This does not enable it. */ > + ret = bq25890_field_write(bq, F_CONV_RATE, 1); > + if (ret < 0) > + return ret; > + > + ret = bq25890_get_chip_state(bq, &state); > + if (ret < 0) > + return ret; > + > + mutex_lock(&bq->lock); > + bq->state = state; > + mutex_unlock(&bq->lock); > + > + return 0; > +} > + > +static enum power_supply_property bq25890_power_supply_props[] = { > + POWER_SUPPLY_PROP_MANUFACTURER, > + POWER_SUPPLY_PROP_STATUS, > + POWER_SUPPLY_PROP_ONLINE, > + POWER_SUPPLY_PROP_HEALTH, > + 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_CHARGE_TERM_CURRENT, > +}; > + > +static char *bq25890_charger_supplied_to[] = { > + "main-battery", > +}; > + > +static const struct power_supply_desc bq25890_power_supply_desc = { > + .name = "bq25890-charger", > + .type = POWER_SUPPLY_TYPE_USB, > + .properties = bq25890_power_supply_props, > + .num_properties = ARRAY_SIZE(bq25890_power_supply_props), > + .get_property = bq25890_power_supply_get_property, > +}; > + > +static int bq25890_power_supply_init(struct bq25890_device *bq) > +{ > + struct power_supply_config psy_cfg = { .drv_data = bq, }; > + > + psy_cfg.supplied_to = bq25890_charger_supplied_to; > + psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to); > + > + bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc, > + &psy_cfg); > + if (IS_ERR(bq->charger)) > + return PTR_ERR(bq->charger); > + > + return 0; > +} > + > +static void bq25890_usb_work(struct work_struct *data) > +{ > + int ret; > + struct bq25890_device *bq = > + container_of(data, struct bq25890_device, usb_work); > + > + switch (bq->usb_event) { > + case USB_EVENT_ID: > + /* Enable boost mode */ > + ret = bq25890_field_write(bq, F_OTG_CFG, 1); > + if (ret < 0) > + goto error; > + break; > + > + case USB_EVENT_NONE: > + /* Disable boost mode */ > + ret = bq25890_field_write(bq, F_OTG_CFG, 0); > + if (ret < 0) > + goto error; > + > + power_supply_changed(bq->charger); > + break; > + } > + > + return; > + > +error: > + dev_err(bq->dev, "%s - Error switching to boost/charger mode.\n", > + __func__); > +} > + > +static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val, > + void *priv) > +{ > + struct bq25890_device *bq = > + container_of(nb, struct bq25890_device, usb_nb); > + > + bq->usb_event = val; > + schedule_work(&bq->usb_work); > + > + return NOTIFY_OK; > +} > + > +static int bq25890_irq_probe(struct bq25890_device *bq) > +{ > + int ret; > + struct gpio_desc *irq; > + > + irq = devm_gpiod_get_index(bq->dev, BQ25890_IRQ_PIN, 0); > + if (IS_ERR(irq)) { > + dev_err(bq->dev, "could not probe irq pin\n"); > + return PTR_ERR(irq); > + } > + > + ret = gpiod_direction_input(irq); > + if (ret < 0) > + return ret; > + > + return gpiod_to_irq(irq); > +} > + > +static int bq25890_fw_read_u32_props(struct bq25890_device *bq) > +{ > + int ret; > + u32 property; > + int i; > + struct bq25890_init_data *init = &bq->init_data; > + struct { > + char *name; > + bool optional; > + enum bq25890_table_ids tbl_id; > + u8 *conv_data; /* holds converted value from given property */ > + } props[] = { > + /* required properties */ > + {"ti,charge-current", false, TBL_ICHG, &init->ichg}, > + {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg}, > + {"ti,termination-current", false, TBL_ITERM, &init->iterm}, > + {"ti,precharge-current", false, TBL_ITERM, &init->iprechg}, > + {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin}, > + {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv}, > + {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti}, > + > + /* optional properties */ > + {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg} > + }; > + > + /* initialize data for optional properties */ > + init->treg = 3; /* 120 degrees Celsius */ > + > + for (i = 0; i < ARRAY_SIZE(props); i++) { > + ret = device_property_read_u32(bq->dev, props[i].name, > + &property); > + if (ret < 0) { > + if (props[i].optional) > + continue; > + > + return ret; > + } > + > + *props[i].conv_data = bq25890_find_idx(property, > + props[i].tbl_id); > + } > + > + return 0; > +} > + > +static int bq25890_fw_probe(struct bq25890_device *bq) > +{ > + int ret; > + struct bq25890_init_data *init = &bq->init_data; > + > + ret = bq25890_fw_read_u32_props(bq); > + if (ret < 0) > + return ret; > + > + init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin"); > + init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq"); > + > + return 0; > +} > + > +static int bq25890_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); > + struct device *dev = &client->dev; > + struct bq25890_device *bq; > + int ret; > + int i; > + > + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { > + dev_err(dev, "No support for SMBUS_BYTE_DATA\n"); > + return -ENODEV; > + } > + > + bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL); > + if (!bq) > + return -ENOMEM; > + > + bq->client = client; > + bq->dev = dev; > + > + mutex_init(&bq->lock); > + > + bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config); > + if (IS_ERR(bq->rmap)) { > + dev_err(dev, "failed to allocate register map\n"); > + return PTR_ERR(bq->rmap); > + } > + > + for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) { > + const struct reg_field *reg_fields = bq25890_reg_fields; > + > + bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap, > + reg_fields[i]); > + if (IS_ERR(bq->rmap_fields[i])) { > + dev_err(dev, "cannot allocate regmap field\n"); > + return PTR_ERR(bq->rmap_fields[i]); > + } > + } > + > + i2c_set_clientdata(client, bq); > + > + bq->chip_id = bq25890_field_read(bq, F_PN); > + if (bq->chip_id < 0) { > + dev_err(dev, "Cannot read chip ID.\n"); > + return ret; > + } > + > + if (bq->chip_id != BQ25890_ID) { > + dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id); > + return -ENODEV; > + } > + > + if (!dev->platform_data) { > + ret = bq25890_fw_probe(bq); > + if (ret < 0) { > + dev_err(dev, "Cannot read device properties.\n"); > + return ret; > + } > + } else { > + return -ENODEV; > + } > + > + ret = bq25890_hw_init(bq); > + if (ret < 0) { > + dev_err(dev, "Cannot initialize the chip.\n"); > + return ret; > + } > + > + if (client->irq <= 0) > + client->irq = bq25890_irq_probe(bq); > + > + if (client->irq < 0) { > + dev_err(dev, "no irq resource found\n"); > + return client->irq; > + } > + > + /* OTG reporting */ > + bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); > + if (!IS_ERR_OR_NULL(bq->usb_phy)) { > + INIT_WORK(&bq->usb_work, bq25890_usb_work); > + bq->usb_nb.notifier_call = bq25890_usb_notifier; > + usb_register_notifier(bq->usb_phy, &bq->usb_nb); > + } > + > + ret = devm_request_threaded_irq(dev, client->irq, NULL, > + bq25890_irq_handler_thread, > + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, > + BQ25890_IRQ_PIN, bq); > + if (ret) > + goto irq_fail; > + > + ret = bq25890_power_supply_init(bq); > + if (ret < 0) { > + dev_err(dev, "Failed to register power supply\n"); > + goto irq_fail; > + } > + > + return 0; > + > +irq_fail: > + if (!IS_ERR_OR_NULL(bq->usb_phy)) > + usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); > + > + return ret; > +} > + > +static int bq25890_remove(struct i2c_client *client) > +{ > + struct bq25890_device *bq = i2c_get_clientdata(client); > + > + if (!IS_ERR_OR_NULL(bq->usb_phy)) > + usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); > + > + power_supply_unregister(bq->charger); > + > + /* reset all registers to default values */ > + bq25890_chip_reset(bq); > + > + return 0; > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int bq25890_suspend(struct device *dev) > +{ > + struct bq25890_device *bq = dev_get_drvdata(dev); > + > + /* > + * If charger is removed, while in suspend, make sure ADC is diabled > + * since it consumes slightly more power. > + */ > + return bq25890_field_write(bq, F_CONV_START, 0); > +} > + > +static int bq25890_resume(struct device *dev) > +{ > + int ret; > + struct bq25890_state state; > + struct bq25890_device *bq = dev_get_drvdata(dev); > + > + ret = bq25890_get_chip_state(bq, &state); > + if (ret < 0) > + return ret; > + > + mutex_lock(&bq->lock); > + bq->state = state; > + mutex_unlock(&bq->lock); > + > + /* Re-enable ADC only if charger is plugged in. */ > + if (bq->state.online) { > + ret = bq25890_field_write(bq, F_CONV_START, 1); > + if (ret < 0) > + return ret; > + } > + > + /* signal userspace, maybe state changed while suspended */ > + power_supply_changed(bq->charger); > + > + return 0; > +} > +#endif > + > +static const struct dev_pm_ops bq25890_pm = { > + SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume) > +}; > + > +static const struct i2c_device_id bq25890_i2c_ids[] = { > + { "bq25890", 0 }, > + {}, > +}; > +MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids); > + > +static const struct of_device_id bq25890_of_match[] = { > + { .compatible = "ti,bq25890", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, bq25890_of_match); > + > +static const struct acpi_device_id bq25890_acpi_match[] = { > + {"BQ258900", 0}, > + {}, > +}; > +MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match); > + > +static struct i2c_driver bq25890_driver = { > + .driver = { > + .name = "bq25890-charger", > + .of_match_table = of_match_ptr(bq25890_of_match), > + .acpi_match_table = ACPI_PTR(bq25890_acpi_match), > + .pm = &bq25890_pm, > + }, > + .probe = bq25890_probe, > + .remove = bq25890_remove, > + .id_table = bq25890_i2c_ids, > +}; > +module_i2c_driver(bq25890_driver); > + > +MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@xxxxxxxxx>"); > +MODULE_DESCRIPTION("bq25890 charger driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
