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1180 lines
29 KiB
1180 lines
29 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* TI BQ24257 charger driver |
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* |
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* Copyright (C) 2015 Intel Corporation |
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* |
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* Datasheets: |
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* https://www.ti.com/product/bq24250 |
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* https://www.ti.com/product/bq24251 |
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* https://www.ti.com/product/bq24257 |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/power_supply.h> |
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#include <linux/regmap.h> |
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#include <linux/types.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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|
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#include <linux/acpi.h> |
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#include <linux/of.h> |
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|
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#define BQ24257_REG_1 0x00 |
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#define BQ24257_REG_2 0x01 |
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#define BQ24257_REG_3 0x02 |
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#define BQ24257_REG_4 0x03 |
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#define BQ24257_REG_5 0x04 |
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#define BQ24257_REG_6 0x05 |
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#define BQ24257_REG_7 0x06 |
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|
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#define BQ24257_MANUFACTURER "Texas Instruments" |
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#define BQ24257_PG_GPIO "pg" |
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|
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#define BQ24257_ILIM_SET_DELAY 1000 /* msec */ |
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|
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/* |
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* When adding support for new devices make sure that enum bq2425x_chip and |
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* bq2425x_chip_name[] always stay in sync! |
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*/ |
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enum bq2425x_chip { |
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BQ24250, |
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BQ24251, |
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BQ24257, |
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}; |
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|
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static const char *const bq2425x_chip_name[] = { |
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"bq24250", |
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"bq24251", |
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"bq24257", |
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}; |
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|
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enum bq24257_fields { |
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F_WD_FAULT, F_WD_EN, F_STAT, F_FAULT, /* REG 1 */ |
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F_RESET, F_IILIMIT, F_EN_STAT, F_EN_TERM, F_CE, F_HZ_MODE, /* REG 2 */ |
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F_VBAT, F_USB_DET, /* REG 3 */ |
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F_ICHG, F_ITERM, /* REG 4 */ |
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F_LOOP_STATUS, F_LOW_CHG, F_DPDM_EN, F_CE_STATUS, F_VINDPM, /* REG 5 */ |
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F_X2_TMR_EN, F_TMR, F_SYSOFF, F_TS_EN, F_TS_STAT, /* REG 6 */ |
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F_VOVP, F_CLR_VDP, F_FORCE_BATDET, F_FORCE_PTM, /* REG 7 */ |
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|
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F_MAX_FIELDS |
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}; |
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|
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/* initial field values, converted from uV/uA */ |
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struct bq24257_init_data { |
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u8 ichg; /* charge current */ |
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u8 vbat; /* regulation voltage */ |
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u8 iterm; /* termination current */ |
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u8 iilimit; /* input current limit */ |
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u8 vovp; /* over voltage protection voltage */ |
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u8 vindpm; /* VDMP input threshold voltage */ |
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}; |
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struct bq24257_state { |
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u8 status; |
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u8 fault; |
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bool power_good; |
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}; |
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|
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struct bq24257_device { |
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struct i2c_client *client; |
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struct device *dev; |
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struct power_supply *charger; |
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|
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enum bq2425x_chip chip; |
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|
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struct regmap *rmap; |
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struct regmap_field *rmap_fields[F_MAX_FIELDS]; |
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|
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struct gpio_desc *pg; |
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|
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struct delayed_work iilimit_setup_work; |
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|
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struct bq24257_init_data init_data; |
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struct bq24257_state state; |
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|
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struct mutex lock; /* protect state data */ |
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|
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bool iilimit_autoset_enable; |
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}; |
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|
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static bool bq24257_is_volatile_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case BQ24257_REG_2: |
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case BQ24257_REG_4: |
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return false; |
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|
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default: |
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return true; |
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} |
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} |
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|
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static const struct regmap_config bq24257_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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|
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.max_register = BQ24257_REG_7, |
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.cache_type = REGCACHE_RBTREE, |
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|
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.volatile_reg = bq24257_is_volatile_reg, |
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}; |
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|
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static const struct reg_field bq24257_reg_fields[] = { |
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/* REG 1 */ |
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[F_WD_FAULT] = REG_FIELD(BQ24257_REG_1, 7, 7), |
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[F_WD_EN] = REG_FIELD(BQ24257_REG_1, 6, 6), |
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[F_STAT] = REG_FIELD(BQ24257_REG_1, 4, 5), |
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[F_FAULT] = REG_FIELD(BQ24257_REG_1, 0, 3), |
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/* REG 2 */ |
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[F_RESET] = REG_FIELD(BQ24257_REG_2, 7, 7), |
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[F_IILIMIT] = REG_FIELD(BQ24257_REG_2, 4, 6), |
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[F_EN_STAT] = REG_FIELD(BQ24257_REG_2, 3, 3), |
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[F_EN_TERM] = REG_FIELD(BQ24257_REG_2, 2, 2), |
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[F_CE] = REG_FIELD(BQ24257_REG_2, 1, 1), |
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[F_HZ_MODE] = REG_FIELD(BQ24257_REG_2, 0, 0), |
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/* REG 3 */ |
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[F_VBAT] = REG_FIELD(BQ24257_REG_3, 2, 7), |
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[F_USB_DET] = REG_FIELD(BQ24257_REG_3, 0, 1), |
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/* REG 4 */ |
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[F_ICHG] = REG_FIELD(BQ24257_REG_4, 3, 7), |
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[F_ITERM] = REG_FIELD(BQ24257_REG_4, 0, 2), |
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/* REG 5 */ |
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[F_LOOP_STATUS] = REG_FIELD(BQ24257_REG_5, 6, 7), |
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[F_LOW_CHG] = REG_FIELD(BQ24257_REG_5, 5, 5), |
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[F_DPDM_EN] = REG_FIELD(BQ24257_REG_5, 4, 4), |
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[F_CE_STATUS] = REG_FIELD(BQ24257_REG_5, 3, 3), |
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[F_VINDPM] = REG_FIELD(BQ24257_REG_5, 0, 2), |
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/* REG 6 */ |
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[F_X2_TMR_EN] = REG_FIELD(BQ24257_REG_6, 7, 7), |
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[F_TMR] = REG_FIELD(BQ24257_REG_6, 5, 6), |
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[F_SYSOFF] = REG_FIELD(BQ24257_REG_6, 4, 4), |
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[F_TS_EN] = REG_FIELD(BQ24257_REG_6, 3, 3), |
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[F_TS_STAT] = REG_FIELD(BQ24257_REG_6, 0, 2), |
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/* REG 7 */ |
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[F_VOVP] = REG_FIELD(BQ24257_REG_7, 5, 7), |
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[F_CLR_VDP] = REG_FIELD(BQ24257_REG_7, 4, 4), |
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[F_FORCE_BATDET] = REG_FIELD(BQ24257_REG_7, 3, 3), |
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[F_FORCE_PTM] = REG_FIELD(BQ24257_REG_7, 2, 2) |
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}; |
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|
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static const u32 bq24257_vbat_map[] = { |
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3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000, |
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3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000, |
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3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000, |
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3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000, |
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4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000, |
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4300000, 4320000, 4340000, 4360000, 4380000, 4400000, 4420000, 4440000 |
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}; |
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|
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#define BQ24257_VBAT_MAP_SIZE ARRAY_SIZE(bq24257_vbat_map) |
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|
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static const u32 bq24257_ichg_map[] = { |
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500000, 550000, 600000, 650000, 700000, 750000, 800000, 850000, 900000, |
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950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, |
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1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, |
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1750000, 1800000, 1850000, 1900000, 1950000, 2000000 |
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}; |
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#define BQ24257_ICHG_MAP_SIZE ARRAY_SIZE(bq24257_ichg_map) |
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|
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static const u32 bq24257_iterm_map[] = { |
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50000, 75000, 100000, 125000, 150000, 175000, 200000, 225000 |
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}; |
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#define BQ24257_ITERM_MAP_SIZE ARRAY_SIZE(bq24257_iterm_map) |
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|
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static const u32 bq24257_iilimit_map[] = { |
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100000, 150000, 500000, 900000, 1500000, 2000000 |
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}; |
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#define BQ24257_IILIMIT_MAP_SIZE ARRAY_SIZE(bq24257_iilimit_map) |
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|
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static const u32 bq24257_vovp_map[] = { |
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6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000, |
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10500000 |
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}; |
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|
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#define BQ24257_VOVP_MAP_SIZE ARRAY_SIZE(bq24257_vovp_map) |
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|
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static const u32 bq24257_vindpm_map[] = { |
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4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000, |
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4760000 |
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}; |
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|
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#define BQ24257_VINDPM_MAP_SIZE ARRAY_SIZE(bq24257_vindpm_map) |
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|
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static int bq24257_field_read(struct bq24257_device *bq, |
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enum bq24257_fields field_id) |
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{ |
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int ret; |
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int val; |
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|
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ret = regmap_field_read(bq->rmap_fields[field_id], &val); |
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if (ret < 0) |
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return ret; |
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return val; |
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} |
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static int bq24257_field_write(struct bq24257_device *bq, |
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enum bq24257_fields field_id, u8 val) |
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{ |
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return regmap_field_write(bq->rmap_fields[field_id], val); |
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} |
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static u8 bq24257_find_idx(u32 value, const u32 *map, u8 map_size) |
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{ |
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u8 idx; |
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|
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for (idx = 1; idx < map_size; idx++) |
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if (value < map[idx]) |
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break; |
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|
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return idx - 1; |
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} |
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|
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enum bq24257_status { |
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STATUS_READY, |
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STATUS_CHARGE_IN_PROGRESS, |
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STATUS_CHARGE_DONE, |
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STATUS_FAULT, |
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}; |
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|
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enum bq24257_fault { |
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FAULT_NORMAL, |
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FAULT_INPUT_OVP, |
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FAULT_INPUT_UVLO, |
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FAULT_SLEEP, |
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FAULT_BAT_TS, |
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FAULT_BAT_OVP, |
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FAULT_TS, |
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FAULT_TIMER, |
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FAULT_NO_BAT, |
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FAULT_ISET, |
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FAULT_INPUT_LDO_LOW, |
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}; |
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static int bq24257_get_input_current_limit(struct bq24257_device *bq, |
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union power_supply_propval *val) |
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{ |
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int ret; |
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ret = bq24257_field_read(bq, F_IILIMIT); |
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if (ret < 0) |
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return ret; |
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|
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/* |
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* The "External ILIM" and "Production & Test" modes are not exposed |
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* through this driver and not being covered by the lookup table. |
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* Should such a mode have become active let's return an error rather |
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* than exceeding the bounds of the lookup table and returning |
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* garbage. |
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*/ |
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if (ret >= BQ24257_IILIMIT_MAP_SIZE) |
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return -ENODATA; |
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val->intval = bq24257_iilimit_map[ret]; |
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return 0; |
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} |
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static int bq24257_set_input_current_limit(struct bq24257_device *bq, |
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const union power_supply_propval *val) |
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{ |
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/* |
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* Address the case where the user manually sets an input current limit |
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* while the charger auto-detection mechanism is is active. In this |
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* case we want to abort and go straight to the user-specified value. |
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*/ |
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if (bq->iilimit_autoset_enable) |
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cancel_delayed_work_sync(&bq->iilimit_setup_work); |
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return bq24257_field_write(bq, F_IILIMIT, |
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bq24257_find_idx(val->intval, |
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bq24257_iilimit_map, |
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BQ24257_IILIMIT_MAP_SIZE)); |
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} |
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static int bq24257_power_supply_get_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct bq24257_device *bq = power_supply_get_drvdata(psy); |
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struct bq24257_state state; |
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|
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mutex_lock(&bq->lock); |
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state = bq->state; |
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mutex_unlock(&bq->lock); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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if (!state.power_good) |
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
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else if (state.status == STATUS_READY) |
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val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
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else if (state.status == STATUS_CHARGE_IN_PROGRESS) |
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val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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else if (state.status == STATUS_CHARGE_DONE) |
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val->intval = POWER_SUPPLY_STATUS_FULL; |
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else |
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
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break; |
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case POWER_SUPPLY_PROP_MANUFACTURER: |
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val->strval = BQ24257_MANUFACTURER; |
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break; |
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|
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case POWER_SUPPLY_PROP_MODEL_NAME: |
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val->strval = bq2425x_chip_name[bq->chip]; |
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break; |
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|
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case POWER_SUPPLY_PROP_ONLINE: |
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val->intval = state.power_good; |
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break; |
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|
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case POWER_SUPPLY_PROP_HEALTH: |
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switch (state.fault) { |
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case FAULT_NORMAL: |
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val->intval = POWER_SUPPLY_HEALTH_GOOD; |
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break; |
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|
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case FAULT_INPUT_OVP: |
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case FAULT_BAT_OVP: |
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val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
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break; |
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|
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case FAULT_TS: |
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case FAULT_BAT_TS: |
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val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
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break; |
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|
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case FAULT_TIMER: |
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val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; |
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break; |
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|
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default: |
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val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
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break; |
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} |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
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val->intval = bq24257_ichg_map[bq->init_data.ichg]; |
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break; |
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|
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
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val->intval = bq24257_ichg_map[BQ24257_ICHG_MAP_SIZE - 1]; |
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break; |
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|
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: |
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val->intval = bq24257_vbat_map[bq->init_data.vbat]; |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
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val->intval = bq24257_vbat_map[BQ24257_VBAT_MAP_SIZE - 1]; |
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break; |
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|
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case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: |
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val->intval = bq24257_iterm_map[bq->init_data.iterm]; |
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break; |
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|
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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return bq24257_get_input_current_limit(bq, val); |
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|
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default: |
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return -EINVAL; |
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} |
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|
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return 0; |
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} |
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static int bq24257_power_supply_set_property(struct power_supply *psy, |
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enum power_supply_property prop, |
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const union power_supply_propval *val) |
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{ |
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struct bq24257_device *bq = power_supply_get_drvdata(psy); |
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|
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switch (prop) { |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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return bq24257_set_input_current_limit(bq, val); |
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default: |
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return -EINVAL; |
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} |
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} |
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|
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static int bq24257_power_supply_property_is_writeable(struct power_supply *psy, |
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enum power_supply_property psp) |
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{ |
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switch (psp) { |
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: |
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return true; |
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default: |
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return false; |
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} |
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} |
|
|
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static int bq24257_get_chip_state(struct bq24257_device *bq, |
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struct bq24257_state *state) |
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{ |
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int ret; |
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|
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ret = bq24257_field_read(bq, F_STAT); |
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if (ret < 0) |
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return ret; |
|
|
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state->status = ret; |
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|
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ret = bq24257_field_read(bq, F_FAULT); |
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if (ret < 0) |
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return ret; |
|
|
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state->fault = ret; |
|
|
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if (bq->pg) |
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state->power_good = !gpiod_get_value_cansleep(bq->pg); |
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else |
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/* |
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* If we have a chip without a dedicated power-good GPIO or |
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* some other explicit bit that would provide this information |
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* assume the power is good if there is no supply related |
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* fault - and not good otherwise. There is a possibility for |
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* other errors to mask that power in fact is not good but this |
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* is probably the best we can do here. |
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*/ |
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switch (state->fault) { |
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case FAULT_INPUT_OVP: |
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case FAULT_INPUT_UVLO: |
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case FAULT_INPUT_LDO_LOW: |
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state->power_good = false; |
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break; |
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default: |
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state->power_good = true; |
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} |
|
|
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return 0; |
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} |
|
|
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static bool bq24257_state_changed(struct bq24257_device *bq, |
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struct bq24257_state *new_state) |
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{ |
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int ret; |
|
|
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mutex_lock(&bq->lock); |
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ret = (bq->state.status != new_state->status || |
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bq->state.fault != new_state->fault || |
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bq->state.power_good != new_state->power_good); |
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mutex_unlock(&bq->lock); |
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|
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return ret; |
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} |
|
|
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enum bq24257_loop_status { |
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LOOP_STATUS_NONE, |
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LOOP_STATUS_IN_DPM, |
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LOOP_STATUS_IN_CURRENT_LIMIT, |
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LOOP_STATUS_THERMAL, |
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}; |
|
|
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enum bq24257_in_ilimit { |
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IILIMIT_100, |
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IILIMIT_150, |
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IILIMIT_500, |
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IILIMIT_900, |
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IILIMIT_1500, |
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IILIMIT_2000, |
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IILIMIT_EXT, |
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IILIMIT_NONE, |
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}; |
|
|
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enum bq24257_vovp { |
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VOVP_6000, |
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VOVP_6500, |
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VOVP_7000, |
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VOVP_8000, |
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VOVP_9000, |
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VOVP_9500, |
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VOVP_10000, |
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VOVP_10500 |
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}; |
|
|
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enum bq24257_vindpm { |
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VINDPM_4200, |
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VINDPM_4280, |
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VINDPM_4360, |
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VINDPM_4440, |
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VINDPM_4520, |
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VINDPM_4600, |
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VINDPM_4680, |
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VINDPM_4760 |
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}; |
|
|
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enum bq24257_port_type { |
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PORT_TYPE_DCP, /* Dedicated Charging Port */ |
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PORT_TYPE_CDP, /* Charging Downstream Port */ |
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PORT_TYPE_SDP, /* Standard Downstream Port */ |
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PORT_TYPE_NON_STANDARD, |
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}; |
|
|
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enum bq24257_safety_timer { |
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SAFETY_TIMER_45, |
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SAFETY_TIMER_360, |
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SAFETY_TIMER_540, |
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SAFETY_TIMER_NONE, |
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}; |
|
|
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static int bq24257_iilimit_autoset(struct bq24257_device *bq) |
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{ |
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int loop_status; |
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int iilimit; |
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int port_type; |
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int ret; |
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const u8 new_iilimit[] = { |
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[PORT_TYPE_DCP] = IILIMIT_2000, |
|
[PORT_TYPE_CDP] = IILIMIT_2000, |
|
[PORT_TYPE_SDP] = IILIMIT_500, |
|
[PORT_TYPE_NON_STANDARD] = IILIMIT_500 |
|
}; |
|
|
|
ret = bq24257_field_read(bq, F_LOOP_STATUS); |
|
if (ret < 0) |
|
goto error; |
|
|
|
loop_status = ret; |
|
|
|
ret = bq24257_field_read(bq, F_IILIMIT); |
|
if (ret < 0) |
|
goto error; |
|
|
|
iilimit = ret; |
|
|
|
/* |
|
* All USB ports should be able to handle 500mA. If not, DPM will lower |
|
* the charging current to accommodate the power source. No need to set |
|
* a lower IILIMIT value. |
|
*/ |
|
if (loop_status == LOOP_STATUS_IN_DPM && iilimit == IILIMIT_500) |
|
return 0; |
|
|
|
ret = bq24257_field_read(bq, F_USB_DET); |
|
if (ret < 0) |
|
goto error; |
|
|
|
port_type = ret; |
|
|
|
ret = bq24257_field_write(bq, F_IILIMIT, new_iilimit[port_type]); |
|
if (ret < 0) |
|
goto error; |
|
|
|
ret = bq24257_field_write(bq, F_TMR, SAFETY_TIMER_360); |
|
if (ret < 0) |
|
goto error; |
|
|
|
ret = bq24257_field_write(bq, F_CLR_VDP, 1); |
|
if (ret < 0) |
|
goto error; |
|
|
|
dev_dbg(bq->dev, "port/loop = %d/%d -> iilimit = %d\n", |
|
port_type, loop_status, new_iilimit[port_type]); |
|
|
|
return 0; |
|
|
|
error: |
|
dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__); |
|
return ret; |
|
} |
|
|
|
static void bq24257_iilimit_setup_work(struct work_struct *work) |
|
{ |
|
struct bq24257_device *bq = container_of(work, struct bq24257_device, |
|
iilimit_setup_work.work); |
|
|
|
bq24257_iilimit_autoset(bq); |
|
} |
|
|
|
static void bq24257_handle_state_change(struct bq24257_device *bq, |
|
struct bq24257_state *new_state) |
|
{ |
|
int ret; |
|
struct bq24257_state old_state; |
|
|
|
mutex_lock(&bq->lock); |
|
old_state = bq->state; |
|
mutex_unlock(&bq->lock); |
|
|
|
/* |
|
* Handle BQ2425x state changes observing whether the D+/D- based input |
|
* current limit autoset functionality is enabled. |
|
*/ |
|
if (!new_state->power_good) { |
|
dev_dbg(bq->dev, "Power removed\n"); |
|
if (bq->iilimit_autoset_enable) { |
|
cancel_delayed_work_sync(&bq->iilimit_setup_work); |
|
|
|
/* activate D+/D- port detection algorithm */ |
|
ret = bq24257_field_write(bq, F_DPDM_EN, 1); |
|
if (ret < 0) |
|
goto error; |
|
} |
|
/* |
|
* When power is removed always return to the default input |
|
* current limit as configured during probe. |
|
*/ |
|
ret = bq24257_field_write(bq, F_IILIMIT, bq->init_data.iilimit); |
|
if (ret < 0) |
|
goto error; |
|
} else if (!old_state.power_good) { |
|
dev_dbg(bq->dev, "Power inserted\n"); |
|
|
|
if (bq->iilimit_autoset_enable) |
|
/* configure input current limit */ |
|
schedule_delayed_work(&bq->iilimit_setup_work, |
|
msecs_to_jiffies(BQ24257_ILIM_SET_DELAY)); |
|
} else if (new_state->fault == FAULT_NO_BAT) { |
|
dev_warn(bq->dev, "Battery removed\n"); |
|
} else if (new_state->fault == FAULT_TIMER) { |
|
dev_err(bq->dev, "Safety timer expired! Battery dead?\n"); |
|
} |
|
|
|
return; |
|
|
|
error: |
|
dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__); |
|
} |
|
|
|
static irqreturn_t bq24257_irq_handler_thread(int irq, void *private) |
|
{ |
|
int ret; |
|
struct bq24257_device *bq = private; |
|
struct bq24257_state state; |
|
|
|
ret = bq24257_get_chip_state(bq, &state); |
|
if (ret < 0) |
|
return IRQ_HANDLED; |
|
|
|
if (!bq24257_state_changed(bq, &state)) |
|
return IRQ_HANDLED; |
|
|
|
dev_dbg(bq->dev, "irq(state changed): status/fault/pg = %d/%d/%d\n", |
|
state.status, state.fault, state.power_good); |
|
|
|
bq24257_handle_state_change(bq, &state); |
|
|
|
mutex_lock(&bq->lock); |
|
bq->state = state; |
|
mutex_unlock(&bq->lock); |
|
|
|
power_supply_changed(bq->charger); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int bq24257_hw_init(struct bq24257_device *bq) |
|
{ |
|
int ret; |
|
int i; |
|
struct bq24257_state state; |
|
|
|
const struct { |
|
int field; |
|
u32 value; |
|
} init_data[] = { |
|
{F_ICHG, bq->init_data.ichg}, |
|
{F_VBAT, bq->init_data.vbat}, |
|
{F_ITERM, bq->init_data.iterm}, |
|
{F_VOVP, bq->init_data.vovp}, |
|
{F_VINDPM, bq->init_data.vindpm}, |
|
}; |
|
|
|
/* |
|
* Disable the watchdog timer to prevent the IC from going back to |
|
* default settings after 50 seconds of I2C inactivity. |
|
*/ |
|
ret = bq24257_field_write(bq, F_WD_EN, 0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* configure the charge currents and voltages */ |
|
for (i = 0; i < ARRAY_SIZE(init_data); i++) { |
|
ret = bq24257_field_write(bq, init_data[i].field, |
|
init_data[i].value); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
ret = bq24257_get_chip_state(bq, &state); |
|
if (ret < 0) |
|
return ret; |
|
|
|
mutex_lock(&bq->lock); |
|
bq->state = state; |
|
mutex_unlock(&bq->lock); |
|
|
|
if (!bq->iilimit_autoset_enable) { |
|
dev_dbg(bq->dev, "manually setting iilimit = %u\n", |
|
bq->init_data.iilimit); |
|
|
|
/* program fixed input current limit */ |
|
ret = bq24257_field_write(bq, F_IILIMIT, |
|
bq->init_data.iilimit); |
|
if (ret < 0) |
|
return ret; |
|
} else if (!state.power_good) |
|
/* activate D+/D- detection algorithm */ |
|
ret = bq24257_field_write(bq, F_DPDM_EN, 1); |
|
else if (state.fault != FAULT_NO_BAT) |
|
ret = bq24257_iilimit_autoset(bq); |
|
|
|
return ret; |
|
} |
|
|
|
static enum power_supply_property bq24257_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_INPUT_CURRENT_LIMIT, |
|
}; |
|
|
|
static char *bq24257_charger_supplied_to[] = { |
|
"main-battery", |
|
}; |
|
|
|
static const struct power_supply_desc bq24257_power_supply_desc = { |
|
.name = "bq24257-charger", |
|
.type = POWER_SUPPLY_TYPE_USB, |
|
.properties = bq24257_power_supply_props, |
|
.num_properties = ARRAY_SIZE(bq24257_power_supply_props), |
|
.get_property = bq24257_power_supply_get_property, |
|
.set_property = bq24257_power_supply_set_property, |
|
.property_is_writeable = bq24257_power_supply_property_is_writeable, |
|
}; |
|
|
|
static ssize_t bq24257_show_ovp_voltage(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq24257_device *bq = power_supply_get_drvdata(psy); |
|
|
|
return scnprintf(buf, PAGE_SIZE, "%u\n", |
|
bq24257_vovp_map[bq->init_data.vovp]); |
|
} |
|
|
|
static ssize_t bq24257_show_in_dpm_voltage(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq24257_device *bq = power_supply_get_drvdata(psy); |
|
|
|
return scnprintf(buf, PAGE_SIZE, "%u\n", |
|
bq24257_vindpm_map[bq->init_data.vindpm]); |
|
} |
|
|
|
static ssize_t bq24257_sysfs_show_enable(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq24257_device *bq = power_supply_get_drvdata(psy); |
|
int ret; |
|
|
|
if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
|
ret = bq24257_field_read(bq, F_HZ_MODE); |
|
else if (strcmp(attr->attr.name, "sysoff_enable") == 0) |
|
ret = bq24257_field_read(bq, F_SYSOFF); |
|
else |
|
return -EINVAL; |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ret); |
|
} |
|
|
|
static ssize_t bq24257_sysfs_set_enable(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, |
|
size_t count) |
|
{ |
|
struct power_supply *psy = dev_get_drvdata(dev); |
|
struct bq24257_device *bq = power_supply_get_drvdata(psy); |
|
long val; |
|
int ret; |
|
|
|
if (kstrtol(buf, 10, &val) < 0) |
|
return -EINVAL; |
|
|
|
if (strcmp(attr->attr.name, "high_impedance_enable") == 0) |
|
ret = bq24257_field_write(bq, F_HZ_MODE, (bool)val); |
|
else if (strcmp(attr->attr.name, "sysoff_enable") == 0) |
|
ret = bq24257_field_write(bq, F_SYSOFF, (bool)val); |
|
else |
|
return -EINVAL; |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL); |
|
static DEVICE_ATTR(in_dpm_voltage, S_IRUGO, bq24257_show_in_dpm_voltage, NULL); |
|
static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, |
|
bq24257_sysfs_show_enable, bq24257_sysfs_set_enable); |
|
static DEVICE_ATTR(sysoff_enable, S_IWUSR | S_IRUGO, |
|
bq24257_sysfs_show_enable, bq24257_sysfs_set_enable); |
|
|
|
static struct attribute *bq24257_charger_sysfs_attrs[] = { |
|
&dev_attr_ovp_voltage.attr, |
|
&dev_attr_in_dpm_voltage.attr, |
|
&dev_attr_high_impedance_enable.attr, |
|
&dev_attr_sysoff_enable.attr, |
|
NULL, |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(bq24257_charger_sysfs); |
|
|
|
static int bq24257_power_supply_init(struct bq24257_device *bq) |
|
{ |
|
struct power_supply_config psy_cfg = { .drv_data = bq, }; |
|
|
|
psy_cfg.attr_grp = bq24257_charger_sysfs_groups; |
|
psy_cfg.supplied_to = bq24257_charger_supplied_to; |
|
psy_cfg.num_supplicants = ARRAY_SIZE(bq24257_charger_supplied_to); |
|
|
|
bq->charger = devm_power_supply_register(bq->dev, |
|
&bq24257_power_supply_desc, |
|
&psy_cfg); |
|
|
|
return PTR_ERR_OR_ZERO(bq->charger); |
|
} |
|
|
|
static void bq24257_pg_gpio_probe(struct bq24257_device *bq) |
|
{ |
|
bq->pg = devm_gpiod_get_optional(bq->dev, BQ24257_PG_GPIO, GPIOD_IN); |
|
|
|
if (PTR_ERR(bq->pg) == -EPROBE_DEFER) { |
|
dev_info(bq->dev, "probe retry requested for PG pin\n"); |
|
return; |
|
} else if (IS_ERR(bq->pg)) { |
|
dev_err(bq->dev, "error probing PG pin\n"); |
|
bq->pg = NULL; |
|
return; |
|
} |
|
|
|
if (bq->pg) |
|
dev_dbg(bq->dev, "probed PG pin = %d\n", desc_to_gpio(bq->pg)); |
|
} |
|
|
|
static int bq24257_fw_probe(struct bq24257_device *bq) |
|
{ |
|
int ret; |
|
u32 property; |
|
|
|
/* Required properties */ |
|
ret = device_property_read_u32(bq->dev, "ti,charge-current", &property); |
|
if (ret < 0) |
|
return ret; |
|
|
|
bq->init_data.ichg = bq24257_find_idx(property, bq24257_ichg_map, |
|
BQ24257_ICHG_MAP_SIZE); |
|
|
|
ret = device_property_read_u32(bq->dev, "ti,battery-regulation-voltage", |
|
&property); |
|
if (ret < 0) |
|
return ret; |
|
|
|
bq->init_data.vbat = bq24257_find_idx(property, bq24257_vbat_map, |
|
BQ24257_VBAT_MAP_SIZE); |
|
|
|
ret = device_property_read_u32(bq->dev, "ti,termination-current", |
|
&property); |
|
if (ret < 0) |
|
return ret; |
|
|
|
bq->init_data.iterm = bq24257_find_idx(property, bq24257_iterm_map, |
|
BQ24257_ITERM_MAP_SIZE); |
|
|
|
/* Optional properties. If not provided use reasonable default. */ |
|
ret = device_property_read_u32(bq->dev, "ti,current-limit", |
|
&property); |
|
if (ret < 0) { |
|
bq->iilimit_autoset_enable = true; |
|
|
|
/* |
|
* Explicitly set a default value which will be needed for |
|
* devices that don't support the automatic setting of the input |
|
* current limit through the charger type detection mechanism. |
|
*/ |
|
bq->init_data.iilimit = IILIMIT_500; |
|
} else |
|
bq->init_data.iilimit = |
|
bq24257_find_idx(property, |
|
bq24257_iilimit_map, |
|
BQ24257_IILIMIT_MAP_SIZE); |
|
|
|
ret = device_property_read_u32(bq->dev, "ti,ovp-voltage", |
|
&property); |
|
if (ret < 0) |
|
bq->init_data.vovp = VOVP_6500; |
|
else |
|
bq->init_data.vovp = bq24257_find_idx(property, |
|
bq24257_vovp_map, |
|
BQ24257_VOVP_MAP_SIZE); |
|
|
|
ret = device_property_read_u32(bq->dev, "ti,in-dpm-voltage", |
|
&property); |
|
if (ret < 0) |
|
bq->init_data.vindpm = VINDPM_4360; |
|
else |
|
bq->init_data.vindpm = |
|
bq24257_find_idx(property, |
|
bq24257_vindpm_map, |
|
BQ24257_VINDPM_MAP_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
static int bq24257_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
struct device *dev = &client->dev; |
|
const struct acpi_device_id *acpi_id; |
|
struct bq24257_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; |
|
|
|
if (ACPI_HANDLE(dev)) { |
|
acpi_id = acpi_match_device(dev->driver->acpi_match_table, |
|
&client->dev); |
|
if (!acpi_id) { |
|
dev_err(dev, "Failed to match ACPI device\n"); |
|
return -ENODEV; |
|
} |
|
bq->chip = (enum bq2425x_chip)acpi_id->driver_data; |
|
} else { |
|
bq->chip = (enum bq2425x_chip)id->driver_data; |
|
} |
|
|
|
mutex_init(&bq->lock); |
|
|
|
bq->rmap = devm_regmap_init_i2c(client, &bq24257_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(bq24257_reg_fields); i++) { |
|
const struct reg_field *reg_fields = bq24257_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); |
|
|
|
if (!dev->platform_data) { |
|
ret = bq24257_fw_probe(bq); |
|
if (ret < 0) { |
|
dev_err(dev, "Cannot read device properties.\n"); |
|
return ret; |
|
} |
|
} else { |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* The BQ24250 doesn't support the D+/D- based charger type detection |
|
* used for the automatic setting of the input current limit setting so |
|
* explicitly disable that feature. |
|
*/ |
|
if (bq->chip == BQ24250) |
|
bq->iilimit_autoset_enable = false; |
|
|
|
if (bq->iilimit_autoset_enable) |
|
INIT_DELAYED_WORK(&bq->iilimit_setup_work, |
|
bq24257_iilimit_setup_work); |
|
|
|
/* |
|
* The BQ24250 doesn't have a dedicated Power Good (PG) pin so let's |
|
* not probe for it and instead use a SW-based approach to determine |
|
* the PG state. We also use a SW-based approach for all other devices |
|
* if the PG pin is either not defined or can't be probed. |
|
*/ |
|
if (bq->chip != BQ24250) |
|
bq24257_pg_gpio_probe(bq); |
|
|
|
if (PTR_ERR(bq->pg) == -EPROBE_DEFER) |
|
return PTR_ERR(bq->pg); |
|
else if (!bq->pg) |
|
dev_info(bq->dev, "using SW-based power-good detection\n"); |
|
|
|
/* reset all registers to defaults */ |
|
ret = bq24257_field_write(bq, F_RESET, 1); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* |
|
* Put the RESET bit back to 0, in cache. For some reason the HW always |
|
* returns 1 on this bit, so this is the only way to avoid resetting the |
|
* chip every time we update another field in this register. |
|
*/ |
|
ret = bq24257_field_write(bq, F_RESET, 0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = bq24257_hw_init(bq); |
|
if (ret < 0) { |
|
dev_err(dev, "Cannot initialize the chip.\n"); |
|
return ret; |
|
} |
|
|
|
ret = bq24257_power_supply_init(bq); |
|
if (ret < 0) { |
|
dev_err(dev, "Failed to register power supply\n"); |
|
return ret; |
|
} |
|
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL, |
|
bq24257_irq_handler_thread, |
|
IRQF_TRIGGER_FALLING | |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
|
bq2425x_chip_name[bq->chip], bq); |
|
if (ret) { |
|
dev_err(dev, "Failed to request IRQ #%d\n", client->irq); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int bq24257_remove(struct i2c_client *client) |
|
{ |
|
struct bq24257_device *bq = i2c_get_clientdata(client); |
|
|
|
if (bq->iilimit_autoset_enable) |
|
cancel_delayed_work_sync(&bq->iilimit_setup_work); |
|
|
|
bq24257_field_write(bq, F_RESET, 1); /* reset to defaults */ |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int bq24257_suspend(struct device *dev) |
|
{ |
|
struct bq24257_device *bq = dev_get_drvdata(dev); |
|
int ret = 0; |
|
|
|
if (bq->iilimit_autoset_enable) |
|
cancel_delayed_work_sync(&bq->iilimit_setup_work); |
|
|
|
/* reset all registers to default (and activate standalone mode) */ |
|
ret = bq24257_field_write(bq, F_RESET, 1); |
|
if (ret < 0) |
|
dev_err(bq->dev, "Cannot reset chip to standalone mode.\n"); |
|
|
|
return ret; |
|
} |
|
|
|
static int bq24257_resume(struct device *dev) |
|
{ |
|
int ret; |
|
struct bq24257_device *bq = dev_get_drvdata(dev); |
|
|
|
ret = regcache_drop_region(bq->rmap, BQ24257_REG_1, BQ24257_REG_7); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = bq24257_field_write(bq, F_RESET, 0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = bq24257_hw_init(bq); |
|
if (ret < 0) { |
|
dev_err(bq->dev, "Cannot init chip after resume.\n"); |
|
return ret; |
|
} |
|
|
|
/* signal userspace, maybe state changed while suspended */ |
|
power_supply_changed(bq->charger); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static const struct dev_pm_ops bq24257_pm = { |
|
SET_SYSTEM_SLEEP_PM_OPS(bq24257_suspend, bq24257_resume) |
|
}; |
|
|
|
static const struct i2c_device_id bq24257_i2c_ids[] = { |
|
{ "bq24250", BQ24250 }, |
|
{ "bq24251", BQ24251 }, |
|
{ "bq24257", BQ24257 }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, bq24257_i2c_ids); |
|
|
|
static const struct of_device_id bq24257_of_match[] = { |
|
{ .compatible = "ti,bq24250", }, |
|
{ .compatible = "ti,bq24251", }, |
|
{ .compatible = "ti,bq24257", }, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, bq24257_of_match); |
|
|
|
#ifdef CONFIG_ACPI |
|
static const struct acpi_device_id bq24257_acpi_match[] = { |
|
{ "BQ242500", BQ24250 }, |
|
{ "BQ242510", BQ24251 }, |
|
{ "BQ242570", BQ24257 }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(acpi, bq24257_acpi_match); |
|
#endif |
|
|
|
static struct i2c_driver bq24257_driver = { |
|
.driver = { |
|
.name = "bq24257-charger", |
|
.of_match_table = of_match_ptr(bq24257_of_match), |
|
.acpi_match_table = ACPI_PTR(bq24257_acpi_match), |
|
.pm = &bq24257_pm, |
|
}, |
|
.probe = bq24257_probe, |
|
.remove = bq24257_remove, |
|
.id_table = bq24257_i2c_ids, |
|
}; |
|
module_i2c_driver(bq24257_driver); |
|
|
|
MODULE_AUTHOR("Laurentiu Palcu <[email protected]>"); |
|
MODULE_DESCRIPTION("bq24257 charger driver"); |
|
MODULE_LICENSE("GPL");
|
|
|