1662 lines
43 KiB
C
1662 lines
43 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* TI BQ25890 charger driver
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*
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* Copyright (C) 2015 Intel Corporation
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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/power/bq25890_charger.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.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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#include <linux/usb/phy.h>
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#include <linux/acpi.h>
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#include <linux/of.h>
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#define BQ25890_MANUFACTURER "Texas Instruments"
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#define BQ25890_IRQ_PIN "bq25890_irq"
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#define BQ25890_ID 3
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#define BQ25895_ID 7
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#define BQ25896_ID 0
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#define PUMP_EXPRESS_START_DELAY (5 * HZ)
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#define PUMP_EXPRESS_MAX_TRIES 6
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#define PUMP_EXPRESS_VBUS_MARGIN_uV 1000000
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enum bq25890_chip_version {
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BQ25890,
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BQ25892,
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BQ25895,
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BQ25896,
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};
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static const char *const bq25890_chip_name[] = {
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"BQ25890",
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"BQ25892",
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"BQ25895",
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"BQ25896",
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};
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enum bq25890_fields {
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F_EN_HIZ, F_EN_ILIM, F_IINLIM, /* Reg00 */
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F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
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F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
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F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
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F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,
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F_MIN_VBAT_SEL, /* Reg03 */
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F_PUMPX_EN, F_ICHG, /* Reg04 */
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F_IPRECHG, F_ITERM, /* Reg05 */
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F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
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F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
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F_JEITA_ISET, /* Reg07 */
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F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
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F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
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F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
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F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */
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F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD,
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F_VSYS_STAT, /* Reg0B */
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F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
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F_NTC_FAULT, /* Reg0C */
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F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
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F_THERM_STAT, F_BATV, /* Reg0E */
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F_SYSV, /* Reg0F */
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F_TSPCT, /* Reg10 */
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F_VBUS_GD, F_VBUSV, /* Reg11 */
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F_ICHGR, /* Reg12 */
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F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
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F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
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F_MAX_FIELDS
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};
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/* initial field values, converted to register values */
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struct bq25890_init_data {
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u8 ichg; /* charge current */
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u8 vreg; /* regulation voltage */
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u8 iterm; /* termination current */
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u8 iprechg; /* precharge current */
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u8 sysvmin; /* minimum system voltage limit */
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u8 boostv; /* boost regulation voltage */
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u8 boosti; /* boost current limit */
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u8 boostf; /* boost frequency */
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u8 ilim_en; /* enable ILIM pin */
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u8 treg; /* thermal regulation threshold */
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u8 rbatcomp; /* IBAT sense resistor value */
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u8 vclamp; /* IBAT compensation voltage limit */
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};
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struct bq25890_state {
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u8 online;
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u8 hiz;
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u8 chrg_status;
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u8 chrg_fault;
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u8 vsys_status;
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u8 boost_fault;
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u8 bat_fault;
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u8 ntc_fault;
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};
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struct bq25890_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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struct power_supply *secondary_chrg;
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struct power_supply_desc desc;
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char name[28]; /* "bq25890-charger-%d" */
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int id;
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struct usb_phy *usb_phy;
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struct notifier_block usb_nb;
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struct work_struct usb_work;
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struct delayed_work pump_express_work;
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unsigned long usb_event;
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struct regmap *rmap;
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struct regmap_field *rmap_fields[F_MAX_FIELDS];
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bool skip_reset;
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bool read_back_init_data;
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bool force_hiz;
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u32 pump_express_vbus_max;
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u32 iinlim_percentage;
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enum bq25890_chip_version chip_version;
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struct bq25890_init_data init_data;
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struct bq25890_state state;
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struct mutex lock; /* protect state data */
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};
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static DEFINE_IDR(bq25890_id);
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static DEFINE_MUTEX(bq25890_id_mutex);
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static const struct regmap_range bq25890_readonly_reg_ranges[] = {
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regmap_reg_range(0x0b, 0x0c),
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regmap_reg_range(0x0e, 0x13),
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};
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static const struct regmap_access_table bq25890_writeable_regs = {
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.no_ranges = bq25890_readonly_reg_ranges,
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.n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
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};
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static const struct regmap_range bq25890_volatile_reg_ranges[] = {
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regmap_reg_range(0x00, 0x00),
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regmap_reg_range(0x02, 0x02),
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regmap_reg_range(0x09, 0x09),
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regmap_reg_range(0x0b, 0x14),
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};
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static const struct regmap_access_table bq25890_volatile_regs = {
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.yes_ranges = bq25890_volatile_reg_ranges,
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.n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
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};
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static const struct regmap_config bq25890_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0x14,
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.cache_type = REGCACHE_RBTREE,
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.wr_table = &bq25890_writeable_regs,
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.volatile_table = &bq25890_volatile_regs,
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};
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static const struct reg_field bq25890_reg_fields[] = {
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/* REG00 */
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[F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
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[F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
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[F_IINLIM] = REG_FIELD(0x00, 0, 5),
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/* REG01 */
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[F_BHOT] = REG_FIELD(0x01, 6, 7),
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[F_BCOLD] = REG_FIELD(0x01, 5, 5),
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[F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
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/* REG02 */
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[F_CONV_START] = REG_FIELD(0x02, 7, 7),
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[F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
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[F_BOOSTF] = REG_FIELD(0x02, 5, 5),
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[F_ICO_EN] = REG_FIELD(0x02, 4, 4),
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[F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
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[F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
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[F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
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[F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
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/* REG03 */
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[F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
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[F_WD_RST] = REG_FIELD(0x03, 6, 6),
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[F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
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[F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
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[F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
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[F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), // BQ25896 only
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/* REG04 */
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[F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
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[F_ICHG] = REG_FIELD(0x04, 0, 6),
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/* REG05 */
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[F_IPRECHG] = REG_FIELD(0x05, 4, 7),
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[F_ITERM] = REG_FIELD(0x05, 0, 3),
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/* REG06 */
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[F_VREG] = REG_FIELD(0x06, 2, 7),
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[F_BATLOWV] = REG_FIELD(0x06, 1, 1),
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[F_VRECHG] = REG_FIELD(0x06, 0, 0),
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/* REG07 */
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[F_TERM_EN] = REG_FIELD(0x07, 7, 7),
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[F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
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[F_WD] = REG_FIELD(0x07, 4, 5),
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[F_TMR_EN] = REG_FIELD(0x07, 3, 3),
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[F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
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[F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), // reserved on BQ25895
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/* REG08 */
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[F_BATCMP] = REG_FIELD(0x08, 5, 7),
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[F_VCLAMP] = REG_FIELD(0x08, 2, 4),
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[F_TREG] = REG_FIELD(0x08, 0, 1),
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/* REG09 */
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[F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
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[F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
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[F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
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[F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), // reserved on BQ25895
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[F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
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[F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
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[F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
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[F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
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/* REG0A */
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[F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
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[F_BOOSTI] = REG_FIELD(0x0A, 0, 2), // reserved on BQ25895
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[F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), // BQ25896 only
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/* REG0B */
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[F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
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[F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
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[F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
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[F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
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[F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
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/* REG0C */
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[F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
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[F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
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[F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
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[F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
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[F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
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/* REG0D */
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[F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
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[F_VINDPM] = REG_FIELD(0x0D, 0, 6),
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/* REG0E */
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[F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
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[F_BATV] = REG_FIELD(0x0E, 0, 6),
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/* REG0F */
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[F_SYSV] = REG_FIELD(0x0F, 0, 6),
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/* REG10 */
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[F_TSPCT] = REG_FIELD(0x10, 0, 6),
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/* REG11 */
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[F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
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[F_VBUSV] = REG_FIELD(0x11, 0, 6),
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/* REG12 */
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[F_ICHGR] = REG_FIELD(0x12, 0, 6),
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/* REG13 */
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[F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
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[F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
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[F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
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/* REG14 */
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[F_REG_RST] = REG_FIELD(0x14, 7, 7),
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[F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
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[F_PN] = REG_FIELD(0x14, 3, 5),
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[F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
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[F_DEV_REV] = REG_FIELD(0x14, 0, 1)
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};
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/*
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* Most of the val -> idx conversions can be computed, given the minimum,
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* maximum and the step between values. For the rest of conversions, we use
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* lookup tables.
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*/
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enum bq25890_table_ids {
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/* range tables */
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TBL_ICHG,
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TBL_ITERM,
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TBL_IINLIM,
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TBL_VREG,
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TBL_BOOSTV,
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TBL_SYSVMIN,
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TBL_VBUSV,
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TBL_VBATCOMP,
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TBL_RBATCOMP,
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/* lookup tables */
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TBL_TREG,
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TBL_BOOSTI,
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TBL_TSPCT,
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};
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/* Thermal Regulation Threshold lookup table, in degrees Celsius */
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static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
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#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
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/* Boost mode current limit lookup table, in uA */
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static const u32 bq25890_boosti_tbl[] = {
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500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
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};
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#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
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/* NTC 10K temperature lookup table in tenths of a degree */
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static const u32 bq25890_tspct_tbl[] = {
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850, 840, 830, 820, 810, 800, 790, 780,
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770, 760, 750, 740, 730, 720, 710, 700,
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690, 685, 680, 675, 670, 660, 650, 645,
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640, 630, 620, 615, 610, 600, 590, 585,
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580, 570, 565, 560, 550, 540, 535, 530,
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520, 515, 510, 500, 495, 490, 480, 475,
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470, 460, 455, 450, 440, 435, 430, 425,
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420, 410, 405, 400, 390, 385, 380, 370,
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365, 360, 355, 350, 340, 335, 330, 320,
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310, 305, 300, 290, 285, 280, 275, 270,
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260, 250, 245, 240, 230, 225, 220, 210,
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205, 200, 190, 180, 175, 170, 160, 150,
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145, 140, 130, 120, 115, 110, 100, 90,
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80, 70, 60, 50, 40, 30, 20, 10,
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0, -10, -20, -30, -40, -60, -70, -80,
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-90, -10, -120, -140, -150, -170, -190, -210,
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};
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#define BQ25890_TSPCT_TBL_SIZE ARRAY_SIZE(bq25890_tspct_tbl)
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struct bq25890_range {
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u32 min;
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u32 max;
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u32 step;
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};
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struct bq25890_lookup {
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const u32 *tbl;
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u32 size;
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};
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static const union {
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struct bq25890_range rt;
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struct bq25890_lookup lt;
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} bq25890_tables[] = {
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/* range tables */
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/* TODO: BQ25896 has max ICHG 3008 mA */
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[TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
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[TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
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[TBL_IINLIM] = { .rt = {100000, 3250000, 50000} }, /* uA */
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[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
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[TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
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[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
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[TBL_VBUSV] = { .rt = {2600000, 15300000, 100000} }, /* uV */
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[TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */
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[TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */
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/* lookup tables */
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[TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
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[TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} },
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[TBL_TSPCT] = { .lt = {bq25890_tspct_tbl, BQ25890_TSPCT_TBL_SIZE} }
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};
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static int bq25890_field_read(struct bq25890_device *bq,
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enum bq25890_fields field_id)
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{
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int ret;
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int val;
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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 bq25890_field_write(struct bq25890_device *bq,
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enum bq25890_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 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
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{
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u8 idx;
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if (id >= TBL_TREG) {
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const u32 *tbl = bq25890_tables[id].lt.tbl;
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u32 tbl_size = bq25890_tables[id].lt.size;
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for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
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;
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} else {
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const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
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u8 rtbl_size;
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rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
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for (idx = 1;
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idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
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idx++)
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;
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}
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return idx - 1;
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}
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static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
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{
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const struct bq25890_range *rtbl;
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|
|
/* 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,
|
|
};
|
|
|
|
enum bq25890_ntc_fault {
|
|
NTC_FAULT_NORMAL = 0,
|
|
NTC_FAULT_WARM = 2,
|
|
NTC_FAULT_COOL = 3,
|
|
NTC_FAULT_COLD = 5,
|
|
NTC_FAULT_HOT = 6,
|
|
};
|
|
|
|
static bool bq25890_is_adc_property(enum power_supply_property psp)
|
|
{
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq);
|
|
|
|
static int bq25890_get_vbus_voltage(struct bq25890_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
ret = bq25890_field_read(bq, F_VBUSV);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return bq25890_find_val(ret, TBL_VBUSV);
|
|
}
|
|
|
|
static void bq25890_update_state(struct bq25890_device *bq,
|
|
enum power_supply_property psp,
|
|
struct bq25890_state *state)
|
|
{
|
|
bool do_adc_conv;
|
|
int ret;
|
|
|
|
mutex_lock(&bq->lock);
|
|
/* update state in case we lost an interrupt */
|
|
__bq25890_handle_irq(bq);
|
|
*state = bq->state;
|
|
do_adc_conv = (!state->online || state->hiz) && bq25890_is_adc_property(psp);
|
|
if (do_adc_conv)
|
|
bq25890_field_write(bq, F_CONV_START, 1);
|
|
mutex_unlock(&bq->lock);
|
|
|
|
if (do_adc_conv)
|
|
regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
|
|
ret, !ret, 25000, 1000000);
|
|
}
|
|
|
|
static int bq25890_power_supply_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct bq25890_device *bq = power_supply_get_drvdata(psy);
|
|
struct bq25890_state state;
|
|
int ret;
|
|
|
|
bq25890_update_state(bq, psp, &state);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
if (!state.online || state.hiz)
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
else if (state.chrg_status == STATUS_NOT_CHARGING)
|
|
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
else if (state.chrg_status == STATUS_PRE_CHARGING ||
|
|
state.chrg_status == STATUS_FAST_CHARGING)
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else if (state.chrg_status == STATUS_TERMINATION_DONE)
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
else
|
|
val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
|
if (!state.online || state.hiz ||
|
|
state.chrg_status == STATUS_NOT_CHARGING ||
|
|
state.chrg_status == STATUS_TERMINATION_DONE)
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
|
else if (state.chrg_status == STATUS_PRE_CHARGING)
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
|
|
else if (state.chrg_status == STATUS_FAST_CHARGING)
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
|
|
else /* unreachable */
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_MANUFACTURER:
|
|
val->strval = BQ25890_MANUFACTURER;
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
|
val->strval = bq25890_chip_name[bq->chip_version];
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = state.online && !state.hiz;
|
|
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_PRECHARGE_CURRENT:
|
|
val->intval = bq25890_find_val(bq->init_data.iprechg, TBL_ITERM);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
|
val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
ret = bq25890_field_read(bq, F_IINLIM);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val->intval = bq25890_find_val(ret, TBL_IINLIM);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW: /* I_BAT now */
|
|
/*
|
|
* This is ADC-sampled immediate charge current supplied
|
|
* from charger to battery. The property name is confusing,
|
|
* for clarification refer to:
|
|
* Documentation/ABI/testing/sysfs-class-power
|
|
* /sys/class/power_supply/<supply_name>/current_now
|
|
*/
|
|
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: /* I_BAT user limit */
|
|
/*
|
|
* This is user-configured constant charge current supplied
|
|
* from charger to battery in first phase of charging, when
|
|
* battery voltage is below constant charge voltage.
|
|
*
|
|
* This value reflects the current hardware setting.
|
|
*
|
|
* The POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX is the
|
|
* maximum value of this property.
|
|
*/
|
|
ret = bq25890_field_read(bq, F_ICHG);
|
|
if (ret < 0)
|
|
return ret;
|
|
val->intval = bq25890_find_val(ret, TBL_ICHG);
|
|
|
|
/* When temperature is too low, charge current is decreased */
|
|
if (bq->state.ntc_fault == NTC_FAULT_COOL) {
|
|
ret = bq25890_field_read(bq, F_JEITA_ISET);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret)
|
|
val->intval /= 5;
|
|
else
|
|
val->intval /= 2;
|
|
}
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: /* I_BAT max */
|
|
/*
|
|
* This is maximum allowed constant charge current supplied
|
|
* from charger to battery in first phase of charging, when
|
|
* battery voltage is below constant charge voltage.
|
|
*
|
|
* This value is constant for each battery and set from DT.
|
|
*/
|
|
val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW: /* V_BAT now */
|
|
/*
|
|
* This is ADC-sampled immediate charge voltage supplied
|
|
* from charger to battery. The property name is confusing,
|
|
* for clarification refer to:
|
|
* Documentation/ABI/testing/sysfs-class-power
|
|
* /sys/class/power_supply/<supply_name>/voltage_now
|
|
*/
|
|
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: /* V_BAT user limit */
|
|
/*
|
|
* This is user-configured constant charge voltage supplied
|
|
* from charger to battery in second phase of charging, when
|
|
* battery voltage reached constant charge voltage.
|
|
*
|
|
* This value reflects the current hardware setting.
|
|
*
|
|
* The POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX is the
|
|
* maximum value of this property.
|
|
*/
|
|
ret = bq25890_field_read(bq, F_VREG);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val->intval = bq25890_find_val(ret, TBL_VREG);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: /* V_BAT max */
|
|
/*
|
|
* This is maximum allowed constant charge voltage supplied
|
|
* from charger to battery in second phase of charging, when
|
|
* battery voltage reached constant charge voltage.
|
|
*
|
|
* This value is constant for each battery and set from DT.
|
|
*/
|
|
val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
|
|
break;
|
|
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
ret = bq25890_field_read(bq, F_TSPCT);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* convert TS percentage into rough temperature */
|
|
val->intval = bq25890_find_val(ret, TBL_TSPCT);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bq25890_power_supply_set_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct bq25890_device *bq = power_supply_get_drvdata(psy);
|
|
struct bq25890_state state;
|
|
int maxval, ret;
|
|
u8 lval;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
|
maxval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
|
|
lval = bq25890_find_idx(min(val->intval, maxval), TBL_ICHG);
|
|
return bq25890_field_write(bq, F_ICHG, lval);
|
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
|
maxval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
|
|
lval = bq25890_find_idx(min(val->intval, maxval), TBL_VREG);
|
|
return bq25890_field_write(bq, F_VREG, lval);
|
|
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
|
lval = bq25890_find_idx(val->intval, TBL_IINLIM);
|
|
return bq25890_field_write(bq, F_IINLIM, lval);
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
ret = bq25890_field_write(bq, F_EN_HIZ, !val->intval);
|
|
if (!ret)
|
|
bq->force_hiz = !val->intval;
|
|
bq25890_update_state(bq, psp, &state);
|
|
return ret;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int bq25890_power_supply_property_is_writeable(struct power_supply *psy,
|
|
enum power_supply_property psp)
|
|
{
|
|
switch (psp) {
|
|
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_ONLINE:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If there are multiple chargers the maximum current the external power-supply
|
|
* can deliver needs to be divided over the chargers. This is done according
|
|
* to the bq->iinlim_percentage setting.
|
|
*/
|
|
static int bq25890_charger_get_scaled_iinlim_regval(struct bq25890_device *bq,
|
|
int iinlim_ua)
|
|
{
|
|
iinlim_ua = iinlim_ua * bq->iinlim_percentage / 100;
|
|
return bq25890_find_idx(iinlim_ua, TBL_IINLIM);
|
|
}
|
|
|
|
/* On the BQ25892 try to get charger-type info from our supplier */
|
|
static void bq25890_charger_external_power_changed(struct power_supply *psy)
|
|
{
|
|
struct bq25890_device *bq = power_supply_get_drvdata(psy);
|
|
union power_supply_propval val;
|
|
int input_current_limit, ret;
|
|
|
|
if (bq->chip_version != BQ25892)
|
|
return;
|
|
|
|
ret = power_supply_get_property_from_supplier(psy,
|
|
POWER_SUPPLY_PROP_USB_TYPE,
|
|
&val);
|
|
if (ret)
|
|
return;
|
|
|
|
switch (val.intval) {
|
|
case POWER_SUPPLY_USB_TYPE_DCP:
|
|
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 2000000);
|
|
if (bq->pump_express_vbus_max) {
|
|
queue_delayed_work(system_power_efficient_wq,
|
|
&bq->pump_express_work,
|
|
PUMP_EXPRESS_START_DELAY);
|
|
}
|
|
break;
|
|
case POWER_SUPPLY_USB_TYPE_CDP:
|
|
case POWER_SUPPLY_USB_TYPE_ACA:
|
|
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 1500000);
|
|
break;
|
|
case POWER_SUPPLY_USB_TYPE_SDP:
|
|
default:
|
|
input_current_limit = bq25890_charger_get_scaled_iinlim_regval(bq, 500000);
|
|
}
|
|
|
|
bq25890_field_write(bq, F_IINLIM, input_current_limit);
|
|
power_supply_changed(psy);
|
|
}
|
|
|
|
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_EN_HIZ, &state->hiz},
|
|
{F_VSYS_STAT, &state->vsys_status},
|
|
{F_BOOST_FAULT, &state->boost_fault},
|
|
{F_BAT_FAULT, &state->bat_fault},
|
|
{F_CHG_FAULT, &state->chrg_fault},
|
|
{F_NTC_FAULT, &state->ntc_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/HIZ/VSYS=%d/%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n",
|
|
state->chrg_status, state->online,
|
|
state->hiz, state->vsys_status,
|
|
state->chrg_fault, state->boost_fault,
|
|
state->bat_fault, state->ntc_fault);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq)
|
|
{
|
|
bool adc_conv_rate, new_adc_conv_rate;
|
|
struct bq25890_state new_state;
|
|
int ret;
|
|
|
|
ret = bq25890_get_chip_state(bq, &new_state);
|
|
if (ret < 0)
|
|
return IRQ_NONE;
|
|
|
|
if (!memcmp(&bq->state, &new_state, sizeof(new_state)))
|
|
return IRQ_NONE;
|
|
|
|
/*
|
|
* Restore HiZ bit in case it was set by user. The chip does not retain
|
|
* this bit on cable replug, hence the bit must be reset manually here.
|
|
*/
|
|
if (new_state.online && !bq->state.online && bq->force_hiz) {
|
|
ret = bq25890_field_write(bq, F_EN_HIZ, bq->force_hiz);
|
|
if (ret < 0)
|
|
goto error;
|
|
new_state.hiz = 1;
|
|
}
|
|
|
|
/* Should period ADC sampling be enabled? */
|
|
adc_conv_rate = bq->state.online && !bq->state.hiz;
|
|
new_adc_conv_rate = new_state.online && !new_state.hiz;
|
|
|
|
if (new_adc_conv_rate != adc_conv_rate) {
|
|
ret = bq25890_field_write(bq, F_CONV_RATE, new_adc_conv_rate);
|
|
if (ret < 0)
|
|
goto error;
|
|
}
|
|
|
|
bq->state = new_state;
|
|
power_supply_changed(bq->charger);
|
|
|
|
return IRQ_HANDLED;
|
|
error:
|
|
dev_err(bq->dev, "Error communicating with the chip: %pe\n",
|
|
ERR_PTR(ret));
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
|
|
{
|
|
struct bq25890_device *bq = private;
|
|
irqreturn_t ret;
|
|
|
|
mutex_lock(&bq->lock);
|
|
ret = __bq25890_handle_irq(bq);
|
|
mutex_unlock(&bq->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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_rw_init_data(struct bq25890_device *bq)
|
|
{
|
|
bool write = !bq->read_back_init_data;
|
|
int ret;
|
|
int i;
|
|
|
|
const struct {
|
|
enum bq25890_fields id;
|
|
u8 *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},
|
|
{F_BATCMP, &bq->init_data.rbatcomp},
|
|
{F_VCLAMP, &bq->init_data.vclamp},
|
|
};
|
|
|
|
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
|
|
if (write) {
|
|
ret = bq25890_field_write(bq, init_data[i].id,
|
|
*init_data[i].value);
|
|
} else {
|
|
ret = bq25890_field_read(bq, init_data[i].id);
|
|
if (ret >= 0)
|
|
*init_data[i].value = ret;
|
|
}
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Accessing init data failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bq25890_hw_init(struct bq25890_device *bq)
|
|
{
|
|
int ret;
|
|
|
|
if (!bq->skip_reset) {
|
|
ret = bq25890_chip_reset(bq);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Reset failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
} else {
|
|
/*
|
|
* Ensure charging is enabled, on some boards where the fw
|
|
* takes care of initalizition F_CHG_CFG is set to 0 before
|
|
* handing control over to the OS.
|
|
*/
|
|
ret = bq25890_field_write(bq, F_CHG_CFG, 1);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Enabling charging 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 */
|
|
ret = bq25890_rw_init_data(bq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = bq25890_get_chip_state(bq, &bq->state);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Get state failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Configure ADC for continuous conversions when charging */
|
|
ret = bq25890_field_write(bq, F_CONV_RATE, bq->state.online && !bq->state.hiz);
|
|
if (ret < 0) {
|
|
dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const enum power_supply_property bq25890_power_supply_props[] = {
|
|
POWER_SUPPLY_PROP_MANUFACTURER,
|
|
POWER_SUPPLY_PROP_MODEL_NAME,
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_HEALTH,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
|
|
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
|
|
POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
|
|
POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
|
|
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
POWER_SUPPLY_PROP_TEMP,
|
|
};
|
|
|
|
static char *bq25890_charger_supplied_to[] = {
|
|
"main-battery",
|
|
};
|
|
|
|
static const struct power_supply_desc bq25890_power_supply_desc = {
|
|
.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,
|
|
.set_property = bq25890_power_supply_set_property,
|
|
.property_is_writeable = bq25890_power_supply_property_is_writeable,
|
|
.external_power_changed = bq25890_charger_external_power_changed,
|
|
};
|
|
|
|
static int bq25890_power_supply_init(struct bq25890_device *bq)
|
|
{
|
|
struct power_supply_config psy_cfg = { .drv_data = bq, };
|
|
|
|
/* Get ID for the device */
|
|
mutex_lock(&bq25890_id_mutex);
|
|
bq->id = idr_alloc(&bq25890_id, bq, 0, 0, GFP_KERNEL);
|
|
mutex_unlock(&bq25890_id_mutex);
|
|
if (bq->id < 0)
|
|
return bq->id;
|
|
|
|
snprintf(bq->name, sizeof(bq->name), "bq25890-charger-%d", bq->id);
|
|
bq->desc = bq25890_power_supply_desc;
|
|
bq->desc.name = bq->name;
|
|
|
|
psy_cfg.supplied_to = bq25890_charger_supplied_to;
|
|
psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
|
|
|
|
bq->charger = devm_power_supply_register(bq->dev, &bq->desc, &psy_cfg);
|
|
|
|
return PTR_ERR_OR_ZERO(bq->charger);
|
|
}
|
|
|
|
static int bq25890_set_otg_cfg(struct bq25890_device *bq, u8 val)
|
|
{
|
|
int ret;
|
|
|
|
ret = bq25890_field_write(bq, F_OTG_CFG, val);
|
|
if (ret < 0)
|
|
dev_err(bq->dev, "Error switching to boost/charger mode: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void bq25890_pump_express_work(struct work_struct *data)
|
|
{
|
|
struct bq25890_device *bq =
|
|
container_of(data, struct bq25890_device, pump_express_work.work);
|
|
union power_supply_propval value;
|
|
int voltage, i, ret;
|
|
|
|
dev_dbg(bq->dev, "Start to request input voltage increasing\n");
|
|
|
|
/* If there is a second charger put in Hi-Z mode */
|
|
if (bq->secondary_chrg) {
|
|
value.intval = 0;
|
|
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
|
|
}
|
|
|
|
/* Enable current pulse voltage control protocol */
|
|
ret = bq25890_field_write(bq, F_PUMPX_EN, 1);
|
|
if (ret < 0)
|
|
goto error_print;
|
|
|
|
for (i = 0; i < PUMP_EXPRESS_MAX_TRIES; i++) {
|
|
voltage = bq25890_get_vbus_voltage(bq);
|
|
if (voltage < 0)
|
|
goto error_print;
|
|
dev_dbg(bq->dev, "input voltage = %d uV\n", voltage);
|
|
|
|
if ((voltage + PUMP_EXPRESS_VBUS_MARGIN_uV) >
|
|
bq->pump_express_vbus_max)
|
|
break;
|
|
|
|
ret = bq25890_field_write(bq, F_PUMPX_UP, 1);
|
|
if (ret < 0)
|
|
goto error_print;
|
|
|
|
/* Note a single PUMPX up pulse-sequence takes 2.1s */
|
|
ret = regmap_field_read_poll_timeout(bq->rmap_fields[F_PUMPX_UP],
|
|
ret, !ret, 100000, 3000000);
|
|
if (ret < 0)
|
|
goto error_print;
|
|
|
|
/* Make sure ADC has sampled Vbus before checking again */
|
|
msleep(1000);
|
|
}
|
|
|
|
bq25890_field_write(bq, F_PUMPX_EN, 0);
|
|
|
|
if (bq->secondary_chrg) {
|
|
value.intval = 1;
|
|
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &value);
|
|
}
|
|
|
|
dev_info(bq->dev, "Hi-voltage charging requested, input voltage is %d mV\n",
|
|
voltage);
|
|
|
|
power_supply_changed(bq->charger);
|
|
|
|
return;
|
|
error_print:
|
|
bq25890_field_write(bq, F_PUMPX_EN, 0);
|
|
dev_err(bq->dev, "Failed to request hi-voltage charging\n");
|
|
}
|
|
|
|
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 */
|
|
bq25890_set_otg_cfg(bq, 1);
|
|
break;
|
|
|
|
case USB_EVENT_NONE:
|
|
/* Disable boost mode */
|
|
ret = bq25890_set_otg_cfg(bq, 0);
|
|
if (ret == 0)
|
|
power_supply_changed(bq->charger);
|
|
break;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_REGULATOR
|
|
static int bq25890_vbus_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct bq25890_device *bq = rdev_get_drvdata(rdev);
|
|
union power_supply_propval val = {
|
|
.intval = 0,
|
|
};
|
|
|
|
/*
|
|
* When enabling 5V boost / Vbus output, we need to put the secondary
|
|
* charger in Hi-Z mode to avoid it trying to charge the secondary
|
|
* battery from the 5V boost output.
|
|
*/
|
|
if (bq->secondary_chrg)
|
|
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
|
|
|
|
return bq25890_set_otg_cfg(bq, 1);
|
|
}
|
|
|
|
static int bq25890_vbus_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct bq25890_device *bq = rdev_get_drvdata(rdev);
|
|
union power_supply_propval val = {
|
|
.intval = 1,
|
|
};
|
|
int ret;
|
|
|
|
ret = bq25890_set_otg_cfg(bq, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (bq->secondary_chrg)
|
|
power_supply_set_property(bq->secondary_chrg, POWER_SUPPLY_PROP_ONLINE, &val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bq25890_vbus_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct bq25890_device *bq = rdev_get_drvdata(rdev);
|
|
|
|
return bq25890_field_read(bq, F_OTG_CFG);
|
|
}
|
|
|
|
static int bq25890_vbus_get_voltage(struct regulator_dev *rdev)
|
|
{
|
|
struct bq25890_device *bq = rdev_get_drvdata(rdev);
|
|
|
|
return bq25890_get_vbus_voltage(bq);
|
|
}
|
|
|
|
static int bq25890_vsys_get_voltage(struct regulator_dev *rdev)
|
|
{
|
|
struct bq25890_device *bq = rdev_get_drvdata(rdev);
|
|
int ret;
|
|
|
|
/* Should be some output voltage ? */
|
|
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) */
|
|
return 2304000 + ret * 20000;
|
|
}
|
|
|
|
static const struct regulator_ops bq25890_vbus_ops = {
|
|
.enable = bq25890_vbus_enable,
|
|
.disable = bq25890_vbus_disable,
|
|
.is_enabled = bq25890_vbus_is_enabled,
|
|
.get_voltage = bq25890_vbus_get_voltage,
|
|
};
|
|
|
|
static const struct regulator_desc bq25890_vbus_desc = {
|
|
.name = "usb_otg_vbus",
|
|
.of_match = "usb-otg-vbus",
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
.ops = &bq25890_vbus_ops,
|
|
};
|
|
|
|
static const struct regulator_ops bq25890_vsys_ops = {
|
|
.get_voltage = bq25890_vsys_get_voltage,
|
|
};
|
|
|
|
static const struct regulator_desc bq25890_vsys_desc = {
|
|
.name = "vsys",
|
|
.of_match = "vsys",
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
.ops = &bq25890_vsys_ops,
|
|
};
|
|
|
|
static int bq25890_register_regulator(struct bq25890_device *bq)
|
|
{
|
|
struct bq25890_platform_data *pdata = dev_get_platdata(bq->dev);
|
|
struct regulator_config cfg = {
|
|
.dev = bq->dev,
|
|
.driver_data = bq,
|
|
};
|
|
struct regulator_dev *reg;
|
|
|
|
if (pdata)
|
|
cfg.init_data = pdata->regulator_init_data;
|
|
|
|
reg = devm_regulator_register(bq->dev, &bq25890_vbus_desc, &cfg);
|
|
if (IS_ERR(reg)) {
|
|
return dev_err_probe(bq->dev, PTR_ERR(reg),
|
|
"registering vbus regulator");
|
|
}
|
|
|
|
/* pdata->regulator_init_data is for vbus only */
|
|
cfg.init_data = NULL;
|
|
reg = devm_regulator_register(bq->dev, &bq25890_vsys_desc, &cfg);
|
|
if (IS_ERR(reg)) {
|
|
return dev_err_probe(bq->dev, PTR_ERR(reg),
|
|
"registering vsys regulator");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int
|
|
bq25890_register_regulator(struct bq25890_device *bq)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int bq25890_get_chip_version(struct bq25890_device *bq)
|
|
{
|
|
int id, rev;
|
|
|
|
id = bq25890_field_read(bq, F_PN);
|
|
if (id < 0) {
|
|
dev_err(bq->dev, "Cannot read chip ID: %d\n", id);
|
|
return id;
|
|
}
|
|
|
|
rev = bq25890_field_read(bq, F_DEV_REV);
|
|
if (rev < 0) {
|
|
dev_err(bq->dev, "Cannot read chip revision: %d\n", rev);
|
|
return rev;
|
|
}
|
|
|
|
switch (id) {
|
|
case BQ25890_ID:
|
|
bq->chip_version = BQ25890;
|
|
break;
|
|
|
|
/* BQ25892 and BQ25896 share same ID 0 */
|
|
case BQ25896_ID:
|
|
switch (rev) {
|
|
case 2:
|
|
bq->chip_version = BQ25896;
|
|
break;
|
|
case 1:
|
|
bq->chip_version = BQ25892;
|
|
break;
|
|
default:
|
|
dev_err(bq->dev,
|
|
"Unknown device revision %d, assume BQ25892\n",
|
|
rev);
|
|
bq->chip_version = BQ25892;
|
|
}
|
|
break;
|
|
|
|
case BQ25895_ID:
|
|
bq->chip_version = BQ25895;
|
|
break;
|
|
|
|
default:
|
|
dev_err(bq->dev, "Unknown chip ID %d\n", id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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))
|
|
return dev_err_probe(bq->dev, PTR_ERR(irq),
|
|
"Could not probe irq pin.\n");
|
|
|
|
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},
|
|
{"ti,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp},
|
|
{"ti,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp},
|
|
};
|
|
|
|
/* initialize data for optional properties */
|
|
init->treg = 3; /* 120 degrees Celsius */
|
|
init->rbatcomp = init->vclamp = 0; /* IBAT compensation disabled */
|
|
|
|
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;
|
|
const char *str;
|
|
u32 val;
|
|
|
|
ret = device_property_read_string(bq->dev, "linux,secondary-charger-name", &str);
|
|
if (ret == 0) {
|
|
bq->secondary_chrg = power_supply_get_by_name(str);
|
|
if (!bq->secondary_chrg)
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
/* Optional, left at 0 if property is not present */
|
|
device_property_read_u32(bq->dev, "linux,pump-express-vbus-max",
|
|
&bq->pump_express_vbus_max);
|
|
|
|
ret = device_property_read_u32(bq->dev, "linux,iinlim-percentage", &val);
|
|
if (ret == 0) {
|
|
if (val > 100) {
|
|
dev_err(bq->dev, "Error linux,iinlim-percentage %u > 100\n", val);
|
|
return -EINVAL;
|
|
}
|
|
bq->iinlim_percentage = val;
|
|
} else {
|
|
bq->iinlim_percentage = 100;
|
|
}
|
|
|
|
bq->skip_reset = device_property_read_bool(bq->dev, "linux,skip-reset");
|
|
bq->read_back_init_data = device_property_read_bool(bq->dev,
|
|
"linux,read-back-settings");
|
|
if (bq->read_back_init_data)
|
|
return 0;
|
|
|
|
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 void bq25890_non_devm_cleanup(void *data)
|
|
{
|
|
struct bq25890_device *bq = data;
|
|
|
|
cancel_delayed_work_sync(&bq->pump_express_work);
|
|
|
|
if (bq->id >= 0) {
|
|
mutex_lock(&bq25890_id_mutex);
|
|
idr_remove(&bq25890_id, bq->id);
|
|
mutex_unlock(&bq25890_id_mutex);
|
|
}
|
|
}
|
|
|
|
static int bq25890_probe(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct bq25890_device *bq;
|
|
int ret;
|
|
|
|
bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
|
|
if (!bq)
|
|
return -ENOMEM;
|
|
|
|
bq->client = client;
|
|
bq->dev = dev;
|
|
bq->id = -1;
|
|
|
|
mutex_init(&bq->lock);
|
|
INIT_DELAYED_WORK(&bq->pump_express_work, bq25890_pump_express_work);
|
|
|
|
bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
|
|
if (IS_ERR(bq->rmap))
|
|
return dev_err_probe(dev, PTR_ERR(bq->rmap),
|
|
"failed to allocate register map\n");
|
|
|
|
ret = devm_regmap_field_bulk_alloc(dev, bq->rmap, bq->rmap_fields,
|
|
bq25890_reg_fields, F_MAX_FIELDS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
i2c_set_clientdata(client, bq);
|
|
|
|
ret = bq25890_get_chip_version(bq);
|
|
if (ret) {
|
|
dev_err(dev, "Cannot read chip ID or unknown chip: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = bq25890_fw_probe(bq);
|
|
if (ret < 0)
|
|
return dev_err_probe(dev, ret, "reading device properties\n");
|
|
|
|
ret = bq25890_hw_init(bq);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Cannot initialize the chip: %d\n", ret);
|
|
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);
|
|
|
|
/*
|
|
* This must be before bq25890_power_supply_init(), so that it runs
|
|
* after devm unregisters the power_supply.
|
|
*/
|
|
ret = devm_add_action_or_reset(dev, bq25890_non_devm_cleanup, bq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = bq25890_register_regulator(bq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = bq25890_power_supply_init(bq);
|
|
if (ret < 0)
|
|
return dev_err_probe(dev, ret, "registering power supply\n");
|
|
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
|
bq25890_irq_handler_thread,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
BQ25890_IRQ_PIN, bq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bq25890_remove(struct i2c_client *client)
|
|
{
|
|
struct bq25890_device *bq = i2c_get_clientdata(client);
|
|
|
|
if (!IS_ERR_OR_NULL(bq->usb_phy)) {
|
|
usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
|
|
cancel_work_sync(&bq->usb_work);
|
|
}
|
|
|
|
if (!bq->skip_reset) {
|
|
/* reset all registers to default values */
|
|
bq25890_chip_reset(bq);
|
|
}
|
|
}
|
|
|
|
static void bq25890_shutdown(struct i2c_client *client)
|
|
{
|
|
struct bq25890_device *bq = i2c_get_clientdata(client);
|
|
|
|
/*
|
|
* TODO this if + return should probably be removed, but that would
|
|
* introduce a function change for boards using the usb-phy framework.
|
|
* This needs to be tested on such a board before making this change.
|
|
*/
|
|
if (!IS_ERR_OR_NULL(bq->usb_phy))
|
|
return;
|
|
|
|
/*
|
|
* Turn off the 5v Boost regulator which outputs Vbus to the device's
|
|
* Micro-USB or Type-C USB port. Leaving this on drains power and
|
|
* this avoids the PMIC on some device-models seeing this as Vbus
|
|
* getting inserted after shutdown, causing the device to immediately
|
|
* power-up again.
|
|
*/
|
|
bq25890_set_otg_cfg(bq, 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_RATE, 0);
|
|
}
|
|
|
|
static int bq25890_resume(struct device *dev)
|
|
{
|
|
int ret;
|
|
struct bq25890_device *bq = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&bq->lock);
|
|
|
|
ret = bq25890_get_chip_state(bq, &bq->state);
|
|
if (ret < 0)
|
|
goto unlock;
|
|
|
|
/* Re-enable ADC only if charger is plugged in. */
|
|
if (bq->state.online) {
|
|
ret = bq25890_field_write(bq, F_CONV_RATE, 1);
|
|
if (ret < 0)
|
|
goto unlock;
|
|
}
|
|
|
|
/* signal userspace, maybe state changed while suspended */
|
|
power_supply_changed(bq->charger);
|
|
|
|
unlock:
|
|
mutex_unlock(&bq->lock);
|
|
|
|
return ret;
|
|
}
|
|
#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 },
|
|
{ "bq25892", 0 },
|
|
{ "bq25895", 0 },
|
|
{ "bq25896", 0 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
|
|
|
|
static const struct of_device_id bq25890_of_match[] = {
|
|
{ .compatible = "ti,bq25890", },
|
|
{ .compatible = "ti,bq25892", },
|
|
{ .compatible = "ti,bq25895", },
|
|
{ .compatible = "ti,bq25896", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bq25890_of_match);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id bq25890_acpi_match[] = {
|
|
{"BQ258900", 0},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
|
|
#endif
|
|
|
|
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_new = bq25890_probe,
|
|
.remove = bq25890_remove,
|
|
.shutdown = bq25890_shutdown,
|
|
.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");
|