forked from Minki/linux
124db1f91b
We have a dedicated pointer for that, so use it. Much easier to read and less computation involved. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
1027 lines
26 KiB
C
1027 lines
26 KiB
C
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#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
|
|
#define BQ25896_ID 0
|
|
|
|
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];
|
|
|
|
int 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), // reserved on BQ25896
|
|
[F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
|
|
[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),
|
|
/* MIN_VBAT_SEL on BQ25896 */
|
|
/* 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),
|
|
/* PFM_OTG_DIS 3 on BQ25896 */
|
|
[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), // reserved on BQ25896
|
|
[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_VREG,
|
|
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_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_MODEL_NAME:
|
|
if (bq->chip_id == BQ25890_ID)
|
|
val->strval = "BQ25890";
|
|
else if (bq->chip_id == BQ25896_ID)
|
|
val->strval = "BQ25896";
|
|
else
|
|
val->strval = "UNKNOWN";
|
|
|
|
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_find_val(bq->init_data.ichg, TBL_ICHG);
|
|
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_find_val(bq->init_data.vreg, TBL_VREG);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
|
val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
ret = bq25890_field_read(bq, 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;
|
|
|
|
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, "Error communicating with the chip.\n");
|
|
}
|
|
|
|
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;
|
|
int rst_check_counter = 10;
|
|
|
|
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 && --rst_check_counter);
|
|
|
|
if (!rst_check_counter)
|
|
return -ETIMEDOUT;
|
|
|
|
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) {
|
|
dev_dbg(bq->dev, "Reset failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* disable watchdog */
|
|
ret = bq25890_field_write(bq, F_WD, 0);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->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 = bq25890_field_write(bq, init_data[i].id,
|
|
init_data[i].value);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Writing init data failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Configure ADC for continuous conversions. This does not enable it. */
|
|
ret = bq25890_field_write(bq, F_CONV_RATE, 1);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = bq25890_get_chip_state(bq, &state);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Get state failed %d\n", ret);
|
|
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_MODEL_NAME,
|
|
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,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
};
|
|
|
|
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);
|
|
|
|
return PTR_ERR_OR_ZERO(bq->charger);
|
|
}
|
|
|
|
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, "Error switching to boost/charger mode.\n");
|
|
}
|
|
|
|
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;
|
|
queue_work(system_power_efficient_wq, &bq->usb_work);
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int bq25890_irq_probe(struct bq25890_device *bq)
|
|
{
|
|
struct gpio_desc *irq;
|
|
|
|
irq = devm_gpiod_get(bq->dev, BQ25890_IRQ_PIN, GPIOD_IN);
|
|
if (IS_ERR(irq)) {
|
|
dev_err(bq->dev, "Could not probe irq pin.\n");
|
|
return PTR_ERR(irq);
|
|
}
|
|
|
|
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;
|
|
|
|
dev_err(bq->dev, "Unable to read property %d %s\n", ret,
|
|
props[i].name);
|
|
|
|
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 = client->adapter;
|
|
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 bq->chip_id;
|
|
}
|
|
|
|
if ((bq->chip_id != BQ25890_ID) && (bq->chip_id != BQ25896_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);
|
|
|
|
power_supply_unregister(bq->charger);
|
|
|
|
if (!IS_ERR_OR_NULL(bq->usb_phy))
|
|
usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
|
|
|
|
/* 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 (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@intel.com>");
|
|
MODULE_DESCRIPTION("bq25890 charger driver");
|
|
MODULE_LICENSE("GPL");
|