github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-16 12:50:02 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph
master
linux/drivers/power/supply/bq25630_charger.c
Linmao Li fdece8642e power: supply: bq25630: Initialize hardware before exposing the power supply 
bq25630_setup() resets the device, disables the watchdog and programs
the charge limits from the battery information. It runs at the end of
bq25630_probe(), that is after the power supply has been registered, so
the device is already exposed to the system while the hardware still
holds its power-on defaults.

power_supply_desc::init runs during registration, after the driver data
and the fwnode are available and before the device is added. Use it for
bq25630_setup() and drop the explicit call from bq25630_probe().

The callback is passed the power supply, so take the driver data from it
and use it for the battery information as well: data->psy is only
assigned once devm_power_supply_register() returns, which is after the
callback has run.

Signed-off-by: Linmao Li <lilinmao@kylinos.cn>
Reviewed-by: Waqar Hameed <waqar.hameed@axis.com>
Link: https://patch.msgid.link/20260730011713.3332913-3-lilinmao@kylinos.cn
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2026-07-30 23:48:33 +02:00

1076 lines
30 KiB
C
Raw Permalink Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for TI BQ25630 charger.
*
* Copyright (C) 2026 Axis Communications AB
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/power_supply.h>
#define BQ25630_DRV_NAME "bq25630-charger"
/* Registers. */
#define BQ25630_REG_CHARGE_CURRENT_LIMIT 0x02
#define BQ25630_REG_CHARGE_VOLTAGE_LIMIT 0x04
#define BQ25630_REG_INPUT_CURRENT_LIMIT 0x06
#define BQ25630_REG_INPUT_VOLTAGE_LIMIT 0x08
#define BQ25630_REG_IOTG_REGULATION 0x0a
#define BQ25630_REG_VOTG_REGULATION 0x0c
#define BQ25630_REG_MINIMAL_SYSTEM_VOLTAGE 0x0e
#define BQ25630_REG_PRECHARGE_CONTROL 0x10
#define BQ25630_REG_TERMINATION_CONTROL 0x12
#define BQ25630_REG_CHARGE_TIMER_CONTROL 0x14
#define BQ25630_REG_CHARGER_CONTROL_0 0x15
#define BQ25630_REG_CHARGER_CONTROL_1 0x16
#define BQ25630_REG_CHARGER_CONTROL_2 0x17
#define BQ25630_REG_CHARGER_CONTROL_3 0x18
#define BQ25630_REG_CHARGER_CONTROL_4 0x19
#define BQ25630_REG_CHARGER_CONTROL_5 0x1a
#define BQ25630_REG_NTC_CONTROL_0 0x1b
#define BQ25630_REG_NTC_CONTROL_1 0x1c
#define BQ25630_REG_NTC_CONTROL_2 0x1d
#define BQ25630_REG_NTC_CONTROL_3 0x1e
#define BQ25630_REG_CHARGER_STATUS_0 0x1f
#define BQ25630_REG_CHARGER_STATUS_1 0x20
#define BQ25630_REG_CHARGER_STATUS_2 0x21
#define BQ25630_REG_FAULT_STATUS 0x22
#define BQ25630_REG_CHARGER_FLAG_0 0x23
#define BQ25630_REG_CHARGER_FLAG_1 0x24
#define BQ25630_REG_FAULT_FLAG 0x25
#define BQ25630_REG_CHARGER_MASK_0 0x26
#define BQ25630_REG_CHARGER_MASK_1 0x27
#define BQ25630_REG_FAULT_MASK 0x28
#define BQ25630_REG_ICO_CURRENT_LIMIT 0x29
#define BQ25630_REG_ADC_CONTROL 0x2b
#define BQ25630_REG_ADC_CHANNEL_DISABLE_1 0x2c
#define BQ25630_REG_IBUS_ADC 0x32
#define BQ25630_REG_IBAT_ADC 0x34
#define BQ25630_REG_VBUS_ADC 0x36
#define BQ25630_REG_VPMID_ADC 0x38
#define BQ25630_REG_VBAT_ADC 0x3a
#define BQ25630_REG_VSYS_ADC 0x3c
#define BQ25630_REG_TS_ADC 0x3e
#define BQ25630_REG_TDIE_ADC 0x40
#define BQ25630_REG_USB_C_CONTROL_0 0x44
#define BQ25630_REG_USB_C_CONTROL_1 0x45
#define BQ25630_REG_LIQUID_CONTROL_0 0x46
#define BQ25630_REG_LIQUID_CONTROL_1 0x47
#define BQ25630_REG_USB_C_INFORMATION_0 0x48
#define BQ25630_REG_USB_C_INFORMATION_1 0x49
#define BQ25630_REG_USB_DAC_CONTROL_0 0x4a
#define BQ25630_REG_USB_DAC_CONTROL_1 0x4b
#define BQ25630_REG_PART_INFORMATION 0x4d
#define BQ25630_NR_STAT_REGS \
(BQ25630_REG_FAULT_FLAG - BQ25630_REG_CHARGER_STATUS_0 + 1)
/* Charge current limits. */
#define BQ25630_ICHG_MIN_REGVAL 0x04
#define BQ25630_ICHG_MIN 80000
#define BQ25630_ICHG_MAX 5040000
#define BQ25630_ICHG_STEP 20000
/* Charge voltage limits. */
#define BQ25630_VREG_MIN_REGVAL 0x15e
#define BQ25630_VREG_MIN 3500000
#define BQ25630_VREG_MAX 4800000
#define BQ25630_VREG_STEP 10000
/* Input current limits. */
#define BQ25630_IINDPM_MIN_REGVAL 0x0a
#define BQ25630_IINDPM_MIN 100000
#define BQ25630_IINDPM_MAX 3200000
#define BQ25630_IINDPM_STEP 10000
/* Input voltage limits. */
#define BQ25630_VINDPM_MIN_REGVAL 0x5f
#define BQ25630_VINDPM_MIN 3800000
#define BQ25630_VINDPM_MAX 16800000
#define BQ25630_VINDPM_STEP 40000
/* Minimal system voltage limits. */
#define BQ25630_VSYSMIN_MIN_REGVAL 0x20
#define BQ25630_VSYSMIN_MIN 2560000
#define BQ25630_VSYSMIN_MAX 4000000
#define BQ25630_VSYSMIN_STEP 80000
/* Pre-charge current limits. */
#define BQ25630_IPRECHG_MIN_REGVAL 0x02
#define BQ25630_IPRECHG_MIN 40000
#define BQ25630_IPRECHG_MAX 1000000
#define BQ25630_IPRECHG_STEP 20000
/* Termination current limits. */
#define BQ25630_ITERM_MIN_REGVAL 0x03
#define BQ25630_ITERM_MIN 30000
#define BQ25630_ITERM_MAX 1000000
#define BQ25630_ITERM_STEP 10000
/* Charge types. */
#define BQ25630_CHG_STAT_NOT_CHARGING 0x00
#define BQ25630_CHG_STAT_TRICKLE_CHARGE 0x01
#define BQ25630_CHG_STAT_PRE_CHARGE 0x02
#define BQ25630_CHG_STAT_FAST_CHARGE 0x03
#define BQ25630_CHG_STAT_TAPER_CHARGE 0x04
#define BQ25630_CHG_STAT_TERMINATION 0x07
/* USB types (VBUS). */
#define BQ25630_VBUS_STAT_NONE 0x00
#define BQ25630_VBUS_STAT_SDP 0x01
#define BQ25630_VBUS_STAT_CDP 0x02
#define BQ25630_VBUS_STAT_DCP 0x03
#define BQ25630_VBUS_STAT_HVDCP 0x06
#define BQ25630_VBUS_STAT_BOOST_OTG 0x07
#define BQ25630_VBUS_STAT_USB_C_DEFAULT 0x08
#define BQ25630_VBUS_STAT_USB_C_MEDIUM 0x09
#define BQ25630_VBUS_STAT_USB_C_HIGH 0x0a
/* Temperature status. */
#define BQ25630_TS_STAT_NORMAL 0x00
#define BQ25630_TS_STAT_COLD 0x01
#define BQ25630_TS_STAT_HOT 0x02
#define BQ25630_TS_STAT_COOL 0x03
#define BQ25630_TS_STAT_WARM 0x04
#define BQ25630_TS_STAT_PRECOOL 0x05
#define BQ25630_TS_STAT_PREWARM 0x06
/* Register fields. */
enum bq25630_regfield {
/* Charge current limit. */
BQ25630_REGF_ICHG,
/* Charge voltage limit. */
BQ25630_REGF_VREG,
/* Input current limit. */
BQ25630_REGF_IINDPM,
/* Input voltage limit. */
BQ25630_REGF_VINDPM,
/* Minimal system voltage. */
BQ25630_REGF_VSYSMIN,
/* Pre-charge current limit. */
BQ25630_REGF_IPRECHG,
/* Termination current threshold. */
BQ25630_REGF_ITERM,
/* IBUS ADC reading. */
BQ25630_REGF_IBUS_ADC,
/* VBUS ADC reading. */
BQ25630_REGF_VBUS_ADC,
/* Watchdog timer. */
BQ25630_REGF_WATCHDOG,
/* Enable charger. */
BQ25630_REGF_EN_CHG,
/* Register reset. */
BQ25630_REGF_REG_RST,
/* BATFET control. */
BQ25630_REGF_BATFET_CTRL,
/* Power good indicator. */
BQ25630_REGF_PG_STAT,
/* Charge status. */
BQ25630_REGF_CHG_STAT,
/* VBUS status. */
BQ25630_REGF_VBUS_STAT,
/* Temperature zone. */
BQ25630_REGF_TS_STAT,
/* Temperature shutdwon. */
BQ25630_REGF_TSHUT_STAT,
/* OTG fault. */
BQ25630_REGF_OTG_FAULT_STAT,
/* System voltage fault. */
BQ25630_REGF_VSYS_FAULT_STAT,
/* Battery fault. */
BQ25630_REGF_BAT_FAULT_STAT,
/* VBUS fault. */
BQ25630_REGF_VBUS_FAULT_STAT,
/* Sentinel value. */
BQ25630_REGF_MAX
};
static const struct reg_field bq25630_regfields[] = {
[BQ25630_REGF_ICHG] =
REG_FIELD(BQ25630_REG_CHARGE_CURRENT_LIMIT, 4, 11),
[BQ25630_REGF_VREG] =
REG_FIELD(BQ25630_REG_CHARGE_VOLTAGE_LIMIT, 3, 11),
[BQ25630_REGF_IINDPM] =
REG_FIELD(BQ25630_REG_INPUT_CURRENT_LIMIT, 3, 11),
[BQ25630_REGF_VINDPM] =
REG_FIELD(BQ25630_REG_INPUT_VOLTAGE_LIMIT, 5, 13),
[BQ25630_REGF_VSYSMIN] =
REG_FIELD(BQ25630_REG_MINIMAL_SYSTEM_VOLTAGE, 6, 11),
[BQ25630_REGF_IPRECHG] =
REG_FIELD(BQ25630_REG_PRECHARGE_CONTROL, 4, 9),
[BQ25630_REGF_ITERM] =
REG_FIELD(BQ25630_REG_TERMINATION_CONTROL, 3, 9),
[BQ25630_REGF_IBUS_ADC] = REG_FIELD(BQ25630_REG_IBUS_ADC, 1, 15),
[BQ25630_REGF_VBUS_ADC] = REG_FIELD(BQ25630_REG_VBUS_ADC, 2, 14),
[BQ25630_REGF_WATCHDOG] =
REG_FIELD(BQ25630_REG_CHARGER_CONTROL_1, 0, 1),
[BQ25630_REGF_EN_CHG] =
REG_FIELD(BQ25630_REG_CHARGER_CONTROL_1, 5, 5),
[BQ25630_REGF_REG_RST] =
REG_FIELD(BQ25630_REG_CHARGER_CONTROL_2, 7, 7),
[BQ25630_REGF_BATFET_CTRL] =
REG_FIELD(BQ25630_REG_CHARGER_CONTROL_3, 0, 1),
[BQ25630_REGF_PG_STAT] =
REG_FIELD(BQ25630_REG_CHARGER_STATUS_0, 7, 7),
[BQ25630_REGF_CHG_STAT] =
REG_FIELD(BQ25630_REG_CHARGER_STATUS_1, 3, 5),
[BQ25630_REGF_VBUS_STAT] =
REG_FIELD(BQ25630_REG_CHARGER_STATUS_2, 4, 7),
[BQ25630_REGF_TS_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 0, 2),
[BQ25630_REGF_TSHUT_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 3, 3),
[BQ25630_REGF_OTG_FAULT_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 4, 4),
[BQ25630_REGF_VSYS_FAULT_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 5, 5),
[BQ25630_REGF_BAT_FAULT_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 6, 6),
[BQ25630_REGF_VBUS_FAULT_STAT] =
REG_FIELD(BQ25630_REG_FAULT_STATUS, 7, 7),
};
/* 8-bit value regmap. */
static const struct regmap_range bq25630_read_reg_range8[] = {
regmap_reg_range(BQ25630_REG_CHARGE_TIMER_CONTROL,
BQ25630_REG_FAULT_MASK),
regmap_reg_range(BQ25630_REG_ADC_CONTROL,
BQ25630_REG_ADC_CHANNEL_DISABLE_1),
regmap_reg_range(BQ25630_REG_USB_C_CONTROL_0,
BQ25630_REG_PART_INFORMATION),
};
static const struct regmap_range bq25630_write_reg_range8[] = {
regmap_reg_range(BQ25630_REG_CHARGE_TIMER_CONTROL,
BQ25630_REG_NTC_CONTROL_3),
regmap_reg_range(BQ25630_REG_CHARGER_MASK_0,
BQ25630_REG_FAULT_MASK),
regmap_reg_range(BQ25630_REG_ADC_CONTROL,
BQ25630_REG_ADC_CHANNEL_DISABLE_1),
regmap_reg_range(BQ25630_REG_USB_C_CONTROL_0,
BQ25630_REG_LIQUID_CONTROL_1),
regmap_reg_range(BQ25630_REG_USB_DAC_CONTROL_0,
BQ25630_REG_USB_DAC_CONTROL_1),
};
static const struct regmap_access_table bq25630_read_reg_access_table8 = {
.yes_ranges = bq25630_read_reg_range8,
.n_yes_ranges = ARRAY_SIZE(bq25630_read_reg_range8),
};
static const struct regmap_access_table bq25630_write_reg_access_table8 = {
.yes_ranges = bq25630_write_reg_range8,
.n_yes_ranges = ARRAY_SIZE(bq25630_write_reg_range8),
};
static const struct regmap_config bq25630_regmap_config8 = {
.name = BQ25630_DRV_NAME "-8bit",
.reg_bits = 8,
.val_bits = 8,
.max_register = BQ25630_REG_PART_INFORMATION,
.rd_table = &bq25630_read_reg_access_table8,
.wr_table = &bq25630_write_reg_access_table8,
};
/* 16-bit little-endian value regmap. */
static const struct regmap_range bq25630_read_reg_range16le[] = {
regmap_reg_range(BQ25630_REG_CHARGE_CURRENT_LIMIT,
BQ25630_REG_TERMINATION_CONTROL),
regmap_reg_range(BQ25630_REG_ICO_CURRENT_LIMIT,
BQ25630_REG_ICO_CURRENT_LIMIT),
};
static const struct regmap_range bq25630_write_reg_range16le[] = {
regmap_reg_range(BQ25630_REG_CHARGE_CURRENT_LIMIT,
BQ25630_REG_TERMINATION_CONTROL),
regmap_reg_range(BQ25630_REG_ICO_CURRENT_LIMIT,
BQ25630_REG_ICO_CURRENT_LIMIT),
};
static const struct regmap_access_table bq25630_read_reg_access_table16le = {
.yes_ranges = bq25630_read_reg_range16le,
.n_yes_ranges = ARRAY_SIZE(bq25630_read_reg_range16le),
};
static const struct regmap_access_table bq25630_write_reg_access_table16le = {
.yes_ranges = bq25630_write_reg_range16le,
.n_yes_ranges = ARRAY_SIZE(bq25630_write_reg_range16le),
};
static const struct regmap_config bq25630_regmap_config16le = {
.name = BQ25630_DRV_NAME "-16bit-le",
.reg_bits = 8,
.val_bits = 16,
.reg_stride = 2,
.val_format_endian = REGMAP_ENDIAN_LITTLE,
/*
* Datasheet doesn't mention that this register is little-endian, but it
* looks like it?
*/
.max_register = BQ25630_REG_TERMINATION_CONTROL,
.rd_table = &bq25630_read_reg_access_table16le,
.wr_table = &bq25630_write_reg_access_table16le,
};
/* 16-bit big-endian value regmap. */
static const struct regmap_range bq25630_read_reg_range16be[] = {
regmap_reg_range(BQ25630_REG_IBUS_ADC,
BQ25630_REG_TDIE_ADC),
};
static const struct regmap_access_table bq25630_read_reg_access_table16be = {
.yes_ranges = bq25630_read_reg_range16be,
.n_yes_ranges = ARRAY_SIZE(bq25630_read_reg_range16be),
};
static const struct regmap_config bq25630_regmap_config16be = {
.name = BQ25630_DRV_NAME "-16bit-be",
.reg_bits = 8,
.val_bits = 16,
.reg_stride = 2,
.val_format_endian = REGMAP_ENDIAN_BIG,
.max_register = BQ25630_REG_TDIE_ADC,
.rd_table = &bq25630_read_reg_access_table16be,
.wr_table = NULL,
};
struct bq25630_data {
struct device *dev;
struct regmap *regmap8;
struct regmap *regmap16le;
struct regmap *regmap16be;
struct regmap_field *regfields[BQ25630_REGF_MAX];
struct power_supply *psy;
/* State status from IRQs. */
u8 statregs[BQ25630_NR_STAT_REGS];
};
static int bq25630_alloc_regfield_range(struct bq25630_data *data,
const enum bq25630_regfield from,
const enum bq25630_regfield to,
struct regmap *regmap)
{
int i;
for (i = from; i <= to; ++i) {
data->regfields[i] = devm_regmap_field_alloc(
data->dev, regmap, bq25630_regfields[i]);
if (IS_ERR(data->regfields[i]))
return dev_err_probe(
data->dev, PTR_ERR(data->regfields[i]),
"Could not allocate register field %d\n", i);
}
return 0;
}
static irqreturn_t bq25630_irq_thread(int irq, void *dev_id)
{
struct bq25630_data *data = dev_id;
u8 regbuf[BQ25630_NR_STAT_REGS];
int ret;
BUILD_BUG_ON(ARRAY_SIZE(regbuf) != ARRAY_SIZE(data->statregs));
ret = regmap_bulk_read(data->regmap8, BQ25630_REG_CHARGER_STATUS_0,
regbuf, ARRAY_SIZE(regbuf));
if (ret) {
dev_err(data->dev, "Could not bulk read IRQ registers (%d)\n",
ret);
goto out;
}
if (memcmp(data->statregs, regbuf, ARRAY_SIZE(data->statregs))) {
power_supply_changed(data->psy);
memcpy(data->statregs, regbuf, ARRAY_SIZE(data->statregs));
}
out:
return IRQ_HANDLED;
}
static int bq25630_read_limit(struct bq25630_data *data,
const enum bq25630_regfield regfield,
const int minval, const int step,
const int minregval, int *val)
{
unsigned int regval;
int ret;
ret = regmap_field_read(data->regfields[regfield], &regval);
if (ret) {
dev_err(data->dev, "Could not read limit (%d)\n", ret);
return ret;
}
*val = minval + step * (regval - minregval);
return 0;
}
static int bq25630_write_limit(struct bq25630_data *data,
const enum bq25630_regfield regfield,
const int minval, const int maxval,
const int step, const int minregval, int val)
{
unsigned int regval;
int ret;
val = clamp(val, minval, maxval);
regval = minregval + ((val - minval) / step);
ret = regmap_field_write(data->regfields[regfield], regval);
if (ret) {
dev_err(data->dev, "Could not write limit (%d)\n", ret);
return ret;
}
return 0;
}
static int bq25630_read_charge_type(struct bq25630_data *data, int *val)
{
unsigned int regval;
int ret;
ret = regmap_field_read(data->regfields[BQ25630_REGF_CHG_STAT],
&regval);
if (ret) {
dev_err(data->dev, "Could not read charge type (%d)\n", ret);
return ret;
}
switch (regval) {
case BQ25630_CHG_STAT_NOT_CHARGING:
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
case BQ25630_CHG_STAT_TRICKLE_CHARGE:
case BQ25630_CHG_STAT_PRE_CHARGE:
*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case BQ25630_CHG_STAT_FAST_CHARGE:
*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case BQ25630_CHG_STAT_TAPER_CHARGE:
*val = POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
break;
case BQ25630_CHG_STAT_TERMINATION:
*val = POWER_SUPPLY_CHARGE_TYPE_BYPASS;
break;
default:
*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
}
return 0;
}
static int bq25630_read_health(struct bq25630_data *data, int *val)
{
unsigned int regval;
int ret;
u8 temp;
ret = regmap_read(data->regmap8, BQ25630_REG_FAULT_STATUS, &regval);
if (ret) {
dev_err(data->dev, "Could not read fault status (%d)\n", ret);
return ret;
}
temp = regval & GENMASK(bq25630_regfields[BQ25630_REGF_TS_STAT].msb,
bq25630_regfields[BQ25630_REGF_TS_STAT].lsb);
if (regval &
GENMASK(bq25630_regfields[BQ25630_REGF_VBUS_FAULT_STAT].msb,
bq25630_regfields[BQ25630_REGF_VBUS_FAULT_STAT].lsb)) {
*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else if (regval &
GENMASK(bq25630_regfields[BQ25630_REGF_BAT_FAULT_STAT].msb,
bq25630_regfields[BQ25630_REGF_BAT_FAULT_STAT].lsb)) {
/*
* We can't differentiate between dead, under voltage or over
* voltage.
*/
*val = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
} else if (regval &
GENMASK(bq25630_regfields[BQ25630_REGF_VSYS_FAULT_STAT].msb,
bq25630_regfields[BQ25630_REGF_VSYS_FAULT_STAT].lsb)) {
/*
* We can't differentiate between under voltage or over voltage.
*/
*val = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
} else if (regval &
GENMASK(bq25630_regfields[BQ25630_REGF_OTG_FAULT_STAT].msb,
bq25630_regfields[BQ25630_REGF_OTG_FAULT_STAT].lsb)) {
/*
* We can't differentiate between under voltage or over voltage.
*/
*val = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
} else if (regval &
GENMASK(bq25630_regfields[BQ25630_REGF_TSHUT_STAT].msb,
bq25630_regfields[BQ25630_REGF_TSHUT_STAT].lsb)) {
/* Temperature shutdown is always due to hot temperatures. */
*val = POWER_SUPPLY_HEALTH_HOT;
} else if (temp) {
switch (temp) {
case BQ25630_TS_STAT_COLD:
*val = POWER_SUPPLY_HEALTH_COLD;
break;
case BQ25630_TS_STAT_COOL:
*val = POWER_SUPPLY_HEALTH_COOL;
break;
case BQ25630_TS_STAT_WARM:
*val = POWER_SUPPLY_HEALTH_WARM;
break;
case BQ25630_TS_STAT_HOT:
*val = POWER_SUPPLY_HEALTH_HOT;
break;
default:
/* Interpret PRECOOL and PREWARM as NORMAL. */
*val = POWER_SUPPLY_HEALTH_GOOD;
}
} else {
*val = POWER_SUPPLY_HEALTH_GOOD;
}
return 0;
}
static int bq25630_read_vbus(struct bq25630_data *data, int *val)
{
unsigned int regval;
int ret;
ret = regmap_field_read(data->regfields[BQ25630_REGF_VBUS_STAT],
&regval);
if (ret) {
dev_err(data->dev, "Could not read VBUS (%d)\n", ret);
return ret;
}
switch (regval) {
case BQ25630_VBUS_STAT_NONE:
*val = -1;
break;
case BQ25630_VBUS_STAT_SDP:
*val = POWER_SUPPLY_USB_TYPE_SDP;
break;
case BQ25630_VBUS_STAT_CDP:
*val = POWER_SUPPLY_USB_TYPE_CDP;
break;
case BQ25630_VBUS_STAT_DCP:
case BQ25630_VBUS_STAT_HVDCP:
*val = POWER_SUPPLY_USB_TYPE_DCP;
break;
case BQ25630_VBUS_STAT_USB_C_DEFAULT:
case BQ25630_VBUS_STAT_USB_C_MEDIUM:
case BQ25630_VBUS_STAT_USB_C_HIGH:
*val = POWER_SUPPLY_USB_TYPE_C;
break;
default:
*val = POWER_SUPPLY_USB_TYPE_UNKNOWN;
}
return 0;
}
static int bq25630_get_status(struct bq25630_data *data, int *val)
{
unsigned int regval;
int ret;
ret = regmap_field_read(data->regfields[BQ25630_REGF_PG_STAT], &regval);
if (ret) {
dev_err(data->dev, "Could not read PG status (%d)", ret);
return ret;
}
if (!regval) {
/* There is not enough power, battery must be discharging. */
*val = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = regmap_field_read(data->regfields[BQ25630_REGF_EN_CHG], &regval);
if (ret) {
dev_err(data->dev, "Could not read charge status (%d)", ret);
return ret;
}
if (!regval) {
/* Charging is not enabled, battery must be discharging. */
*val = POWER_SUPPLY_STATUS_DISCHARGING;
return 0;
}
ret = bq25630_read_charge_type(data, val);
if (ret)
return ret;
switch (*val) {
case POWER_SUPPLY_CHARGE_TYPE_NONE:
*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case POWER_SUPPLY_CHARGE_TYPE_BYPASS:
/* Corresponds to BQ25630_CHG_STAT_TERMINATION. */
*val = POWER_SUPPLY_STATUS_FULL;
break;
default:
*val = POWER_SUPPLY_STATUS_CHARGING;
}
return 0;
}
static int bq25630_reset(struct bq25630_data *data)
{
unsigned int regval = 1;
int ret;
ret = regmap_field_force_write(data->regfields[BQ25630_REGF_REG_RST],
regval);
if (ret) {
dev_err(data->dev,
"Could not force write reset register field (%d)\n",
ret);
return ret;
}
/*
* After a successful register reset, the device signals by resetting
* this register field to 0. Try reading it for some interrupt cycles.
*/
ret = regmap_field_read_poll_timeout(
data->regfields[BQ25630_REGF_REG_RST], regval, regval == 0, 256,
100000);
if (ret) {
dev_err(data->dev, "Could not read reset register field (%d)\n",
ret);
return ret;
}
return 0;
}
static int bq25630_setup(struct power_supply *psy)
{
struct bq25630_data *data = power_supply_get_drvdata(psy);
struct power_supply_battery_info *batinfo;
int ret;
ret = bq25630_reset(data);
if (ret) {
dev_err(data->dev, "Could not reset device (%d)\n", ret);
return ret;
}
/* Disable the watchdog. */
ret = regmap_field_write(data->regfields[BQ25630_REGF_WATCHDOG], 0);
if (ret) {
dev_err(data->dev, "Could not write watchdog timer (%d)\n",
ret);
return ret;
}
ret = power_supply_get_battery_info(psy, &batinfo);
if (ret) {
dev_err(data->dev, "Could not get battery info (%d)\n", ret);
return ret;
}
/*
* Set values according to battery info. Warn on missing "dangerous"
* properties.
*/
if (batinfo->voltage_min_design_uv >= 0) {
ret = bq25630_write_limit(data, BQ25630_REGF_VSYSMIN,
BQ25630_VSYSMIN_MIN,
BQ25630_VSYSMIN_MAX,
BQ25630_VSYSMIN_STEP,
BQ25630_VSYSMIN_MIN_REGVAL,
batinfo->voltage_min_design_uv);
if (ret)
goto out_put_batinfo;
} else
dev_warn(data->dev,
"Using default value for minimum voltage\n");
if (batinfo->constant_charge_voltage_max_uv >= 0) {
ret = bq25630_write_limit(
data, BQ25630_REGF_VREG, BQ25630_VREG_MIN,
BQ25630_VREG_MAX, BQ25630_VREG_STEP,
BQ25630_VREG_MIN_REGVAL,
batinfo->constant_charge_voltage_max_uv);
if (ret)
goto out_put_batinfo;
} else
dev_warn(data->dev,
"Using default value for maximum constant charge voltage\n");
if (batinfo->constant_charge_current_max_ua >= 0) {
ret = bq25630_write_limit(
data, BQ25630_REGF_ICHG, BQ25630_ICHG_MIN,
BQ25630_ICHG_MAX, BQ25630_ICHG_STEP,
BQ25630_ICHG_MIN_REGVAL,
batinfo->constant_charge_current_max_ua);
if (ret)
goto out_put_batinfo;
} else
dev_warn(data->dev,
"Using default value for maximum constant charge current\n");
if (batinfo->charge_term_current_ua >= 0) {
ret = bq25630_write_limit(
data, BQ25630_REGF_ITERM, BQ25630_ITERM_MIN,
BQ25630_ITERM_MAX, BQ25630_ITERM_STEP,
BQ25630_ITERM_MIN_REGVAL,
batinfo->charge_term_current_ua);
if (ret)
goto out_put_batinfo;
}
if (batinfo->precharge_current_ua >= 0) {
ret = bq25630_write_limit(data, BQ25630_REGF_IPRECHG,
BQ25630_IPRECHG_MIN,
BQ25630_IPRECHG_MAX,
BQ25630_IPRECHG_STEP,
BQ25630_IPRECHG_MIN_REGVAL,
batinfo->precharge_current_ua);
if (ret)
goto out_put_batinfo;
}
out_put_batinfo:
power_supply_put_battery_info(psy, batinfo);
return ret;
}
static int bq25630_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct bq25630_data *data = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
ret = bq25630_get_status(data, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
case POWER_SUPPLY_PROP_CHARGE_TYPES:
ret = bq25630_read_charge_type(data, &val->intval);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq25630_read_health(data, &val->intval);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_field_read(data->regfields[BQ25630_REGF_EN_CHG],
&val->intval);
if (ret || !val->intval) {
/* Charging is not even enabled. */
break;
}
ret = bq25630_read_vbus(data, &val->intval);
val->intval = val->intval >= 0;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = bq25630_read_limit(data, BQ25630_REGF_VSYSMIN,
BQ25630_VSYSMIN_MIN,
BQ25630_VSYSMIN_STEP,
BQ25630_VSYSMIN_MIN_REGVAL,
&val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq25630_read_limit(data, BQ25630_REGF_ICHG,
BQ25630_ICHG_MIN, BQ25630_ICHG_STEP,
BQ25630_ICHG_MIN_REGVAL, &val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
val->intval = BQ25630_ICHG_MAX;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq25630_read_limit(data, BQ25630_REGF_VREG,
BQ25630_VREG_MIN, BQ25630_VREG_STEP,
BQ25630_VREG_MIN_REGVAL, &val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
val->intval = BQ25630_VREG_MAX;
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq25630_read_limit(data, BQ25630_REGF_IINDPM,
BQ25630_IINDPM_MIN,
BQ25630_IINDPM_STEP,
BQ25630_IINDPM_MIN_REGVAL,
&val->intval);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq25630_read_limit(data, BQ25630_REGF_VINDPM,
BQ25630_VINDPM_MIN,
BQ25630_VINDPM_STEP,
BQ25630_VINDPM_MIN_REGVAL,
&val->intval);
break;
case POWER_SUPPLY_PROP_USB_TYPE:
ret = bq25630_read_vbus(data, &val->intval);
if (!ret && val->intval < 0) {
/* Nothing connected. */
val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
}
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = bq25630_read_limit(data, BQ25630_REGF_IPRECHG,
BQ25630_IPRECHG_MIN,
BQ25630_IPRECHG_STEP,
BQ25630_IPRECHG_MIN_REGVAL,
&val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = bq25630_read_limit(data, BQ25630_REGF_ITERM,
BQ25630_ITERM_MIN, BQ25630_ITERM_STEP,
BQ25630_ITERM_MIN_REGVAL,
&val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = "BQ25630";
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = "Texas Instruments";
break;
default:
return -EINVAL;
}
return ret;
}
static int bq25630_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq25630_data *data = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_field_write(data->regfields[BQ25630_REGF_EN_CHG],
!!val->intval);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = bq25630_write_limit(
data, BQ25630_REGF_VSYSMIN, BQ25630_VSYSMIN_MIN,
BQ25630_VSYSMIN_MAX, BQ25630_VSYSMIN_STEP,
BQ25630_VSYSMIN_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq25630_write_limit(data, BQ25630_REGF_ICHG,
BQ25630_ICHG_MIN, BQ25630_ICHG_MAX,
BQ25630_ICHG_STEP,
BQ25630_ICHG_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq25630_write_limit(data, BQ25630_REGF_VREG,
BQ25630_VREG_MIN, BQ25630_VREG_MAX,
BQ25630_VREG_STEP,
BQ25630_VREG_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = bq25630_write_limit(
data, BQ25630_REGF_IINDPM, BQ25630_IINDPM_MIN,
BQ25630_IINDPM_MAX, BQ25630_IINDPM_STEP,
BQ25630_IINDPM_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
ret = bq25630_write_limit(
data, BQ25630_REGF_VINDPM, BQ25630_VINDPM_MIN,
BQ25630_VINDPM_MAX, BQ25630_VINDPM_STEP,
BQ25630_VINDPM_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
ret = bq25630_write_limit(
data, BQ25630_REGF_IPRECHG, BQ25630_IPRECHG_MIN,
BQ25630_IPRECHG_MAX, BQ25630_IPRECHG_STEP,
BQ25630_IPRECHG_MIN_REGVAL, val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
ret = bq25630_write_limit(data, BQ25630_REGF_ITERM,
BQ25630_ITERM_MIN, BQ25630_ITERM_MAX,
BQ25630_ITERM_STEP,
BQ25630_ITERM_MIN_REGVAL,
val->intval);
break;
default:
return -EINVAL;
}
return ret;
}
static int bq25630_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
return true;
default:
return false;
}
}
static const enum power_supply_property bq25630_charger_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_CHARGE_TYPES,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
POWER_SUPPLY_PROP_USB_TYPE,
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static const struct power_supply_desc bq25630_charger_psy_desc = {
.name = BQ25630_DRV_NAME,
.type = POWER_SUPPLY_TYPE_USB,
.charge_types = BIT(POWER_SUPPLY_CHARGE_TYPE_NONE) |
BIT(POWER_SUPPLY_CHARGE_TYPE_TRICKLE) |
BIT(POWER_SUPPLY_CHARGE_TYPE_FAST) |
BIT(POWER_SUPPLY_CHARGE_TYPE_LONGLIFE) |
BIT(POWER_SUPPLY_CHARGE_TYPE_BYPASS) |
BIT(POWER_SUPPLY_CHARGE_TYPE_UNKNOWN),
.usb_types = BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN) |
BIT(POWER_SUPPLY_USB_TYPE_SDP) |
BIT(POWER_SUPPLY_USB_TYPE_DCP) |
BIT(POWER_SUPPLY_USB_TYPE_CDP) |
BIT(POWER_SUPPLY_USB_TYPE_C),
.properties = bq25630_charger_properties,
.num_properties = ARRAY_SIZE(bq25630_charger_properties),
.get_property = bq25630_charger_get_property,
.set_property = bq25630_charger_set_property,
.property_is_writeable = bq25630_charger_property_is_writeable,
.init = bq25630_setup,
};
static int bq25630_probe(struct i2c_client *client)
{
struct power_supply_config psy_cfg = {};
struct bq25630_data *data;
int ret;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = &client->dev;
data->regmap8 = devm_regmap_init_i2c(client, &bq25630_regmap_config8);
if (IS_ERR(data->regmap8))
return dev_err_probe(data->dev, PTR_ERR(data->regmap8),
"Could not initialize regmap8\n");
ret = bq25630_alloc_regfield_range(data, BQ25630_REGF_WATCHDOG,
BQ25630_REGF_TS_STAT,
data->regmap8);
if (ret)
return ret;
data->regmap16le =
devm_regmap_init_i2c(client, &bq25630_regmap_config16le);
if (IS_ERR(data->regmap16le))
return dev_err_probe(data->dev, PTR_ERR(data->regmap16le),
"Could not initialize regmap16le\n");
ret = bq25630_alloc_regfield_range(data, BQ25630_REGF_ICHG,
BQ25630_REGF_ITERM,
data->regmap16le);
if (ret)
return ret;
data->regmap16be =
devm_regmap_init_i2c(client, &bq25630_regmap_config16be);
if (IS_ERR(data->regmap16be))
return dev_err_probe(data->dev, PTR_ERR(data->regmap16be),
"Could not initialize regmap16be\n");
ret = bq25630_alloc_regfield_range(data, BQ25630_REGF_IBUS_ADC,
BQ25630_REGF_VBUS_ADC,
data->regmap16be);
if (ret)
return ret;
psy_cfg.drv_data = data;
psy_cfg.fwnode = dev_fwnode(data->dev);
data->psy = devm_power_supply_register(
data->dev, &bq25630_charger_psy_desc, &psy_cfg);
if (IS_ERR(data->psy))
return dev_err_probe(data->dev, PTR_ERR(data->psy),
"Could not register power supply\n");
/*
* Device sends active low 256 µs pulse to report status and fault.
*
* Note that we need to request this *after* registering the power
* supply so devm destructs it correctly in the reverse order. Otherwise
* spurious interrupts could call power_supply_changed() wrongly with a
* uninitialized/deallocated power supply.
*/
ret = devm_request_threaded_irq(data->dev, client->irq, NULL,
bq25630_irq_thread,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
NULL, data);
if (ret)
return dev_err_probe(data->dev, ret, "Could not request IRQ\n");
return 0;
}
static const struct of_device_id bq25630_of_match[] = {
{
.compatible = "ti,bq25630",
},
{}
};
MODULE_DEVICE_TABLE(of, bq25630_of_match);
static struct i2c_driver bq25630_driver = {
.driver = {
.name = BQ25630_DRV_NAME,
.of_match_table = bq25630_of_match,
},
.probe = bq25630_probe,
};
module_i2c_driver(bq25630_driver);
MODULE_AUTHOR("Waqar Hameed <waqar.hameed@axis.com>");
MODULE_DESCRIPTION("TI BQ25630 charger driver");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink