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-rw-r--r--drivers/power/supply/bq25890_charger.c1448
1 files changed, 1448 insertions, 0 deletions
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
new file mode 100644
index 000000000..ee6e28f1d
--- /dev/null
+++ b/drivers/power/supply/bq25890_charger.c
@@ -0,0 +1,1448 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * TI BQ25890 charger driver
+ *
+ * Copyright (C) 2015 Intel Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/power_supply.h>
+#include <linux/power/bq25890_charger.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/usb/phy.h>
+
+#include <linux/acpi.h>
+#include <linux/of.h>
+
+#define BQ25890_MANUFACTURER "Texas Instruments"
+#define BQ25890_IRQ_PIN "bq25890_irq"
+
+#define BQ25890_ID 3
+#define BQ25895_ID 7
+#define BQ25896_ID 0
+
+#define PUMP_EXPRESS_START_DELAY (5 * HZ)
+#define PUMP_EXPRESS_MAX_TRIES 6
+#define PUMP_EXPRESS_VBUS_MARGIN_uV 1000000
+
+enum bq25890_chip_version {
+ BQ25890,
+ BQ25892,
+ BQ25895,
+ BQ25896,
+};
+
+static const char *const bq25890_chip_name[] = {
+ "BQ25890",
+ "BQ25892",
+ "BQ25895",
+ "BQ25896",
+};
+
+enum bq25890_fields {
+ F_EN_HIZ, F_EN_ILIM, F_IINLIM, /* Reg00 */
+ F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
+ F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
+ F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
+ F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,
+ F_MIN_VBAT_SEL, /* Reg03 */
+ F_PUMPX_EN, F_ICHG, /* Reg04 */
+ F_IPRECHG, F_ITERM, /* Reg05 */
+ F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
+ F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
+ F_JEITA_ISET, /* Reg07 */
+ F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
+ F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
+ F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
+ F_BOOSTV, F_PFM_OTG_DIS, F_BOOSTI, /* Reg0A */
+ F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_0B_RSVD,
+ F_VSYS_STAT, /* Reg0B */
+ F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
+ F_NTC_FAULT, /* Reg0C */
+ F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
+ F_THERM_STAT, F_BATV, /* Reg0E */
+ F_SYSV, /* Reg0F */
+ F_TSPCT, /* Reg10 */
+ F_VBUS_GD, F_VBUSV, /* Reg11 */
+ F_ICHGR, /* Reg12 */
+ F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
+ F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
+
+ F_MAX_FIELDS
+};
+
+/* initial field values, converted to register values */
+struct bq25890_init_data {
+ u8 ichg; /* charge current */
+ u8 vreg; /* regulation voltage */
+ u8 iterm; /* termination current */
+ u8 iprechg; /* precharge current */
+ u8 sysvmin; /* minimum system voltage limit */
+ u8 boostv; /* boost regulation voltage */
+ u8 boosti; /* boost current limit */
+ u8 boostf; /* boost frequency */
+ u8 ilim_en; /* enable ILIM pin */
+ u8 treg; /* thermal regulation threshold */
+ u8 rbatcomp; /* IBAT sense resistor value */
+ u8 vclamp; /* IBAT compensation voltage limit */
+};
+
+struct bq25890_state {
+ u8 online;
+ u8 chrg_status;
+ u8 chrg_fault;
+ u8 vsys_status;
+ u8 boost_fault;
+ u8 bat_fault;
+ u8 ntc_fault;
+};
+
+struct bq25890_device {
+ struct i2c_client *client;
+ struct device *dev;
+ struct power_supply *charger;
+
+ struct usb_phy *usb_phy;
+ struct notifier_block usb_nb;
+ struct work_struct usb_work;
+ struct delayed_work pump_express_work;
+ unsigned long usb_event;
+
+ struct regmap *rmap;
+ struct regmap_field *rmap_fields[F_MAX_FIELDS];
+
+ bool skip_reset;
+ bool read_back_init_data;
+ u32 pump_express_vbus_max;
+ enum bq25890_chip_version chip_version;
+ struct bq25890_init_data init_data;
+ struct bq25890_state state;
+
+ struct mutex lock; /* protect state data */
+};
+
+static const struct regmap_range bq25890_readonly_reg_ranges[] = {
+ regmap_reg_range(0x0b, 0x0c),
+ regmap_reg_range(0x0e, 0x13),
+};
+
+static const struct regmap_access_table bq25890_writeable_regs = {
+ .no_ranges = bq25890_readonly_reg_ranges,
+ .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
+};
+
+static const struct regmap_range bq25890_volatile_reg_ranges[] = {
+ regmap_reg_range(0x00, 0x00),
+ regmap_reg_range(0x02, 0x02),
+ regmap_reg_range(0x09, 0x09),
+ regmap_reg_range(0x0b, 0x14),
+};
+
+static const struct regmap_access_table bq25890_volatile_regs = {
+ .yes_ranges = bq25890_volatile_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
+};
+
+static const struct regmap_config bq25890_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0x14,
+ .cache_type = REGCACHE_RBTREE,
+
+ .wr_table = &bq25890_writeable_regs,
+ .volatile_table = &bq25890_volatile_regs,
+};
+
+static const struct reg_field bq25890_reg_fields[] = {
+ /* REG00 */
+ [F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
+ [F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
+ [F_IINLIM] = REG_FIELD(0x00, 0, 5),
+ /* REG01 */
+ [F_BHOT] = REG_FIELD(0x01, 6, 7),
+ [F_BCOLD] = REG_FIELD(0x01, 5, 5),
+ [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
+ /* REG02 */
+ [F_CONV_START] = REG_FIELD(0x02, 7, 7),
+ [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
+ [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
+ [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
+ [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3), // reserved on BQ25896
+ [F_MAXC_EN] = REG_FIELD(0x02, 2, 2), // reserved on BQ25896
+ [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
+ [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
+ /* REG03 */
+ [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
+ [F_WD_RST] = REG_FIELD(0x03, 6, 6),
+ [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
+ [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
+ [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
+ [F_MIN_VBAT_SEL] = REG_FIELD(0x03, 0, 0), // BQ25896 only
+ /* REG04 */
+ [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
+ [F_ICHG] = REG_FIELD(0x04, 0, 6),
+ /* REG05 */
+ [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
+ [F_ITERM] = REG_FIELD(0x05, 0, 3),
+ /* REG06 */
+ [F_VREG] = REG_FIELD(0x06, 2, 7),
+ [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
+ [F_VRECHG] = REG_FIELD(0x06, 0, 0),
+ /* REG07 */
+ [F_TERM_EN] = REG_FIELD(0x07, 7, 7),
+ [F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
+ [F_WD] = REG_FIELD(0x07, 4, 5),
+ [F_TMR_EN] = REG_FIELD(0x07, 3, 3),
+ [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
+ [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0), // reserved on BQ25895
+ /* REG08 */
+ [F_BATCMP] = REG_FIELD(0x08, 5, 7),
+ [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
+ [F_TREG] = REG_FIELD(0x08, 0, 1),
+ /* REG09 */
+ [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
+ [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
+ [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
+ [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4), // reserved on BQ25895
+ [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
+ [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
+ [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
+ [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
+ /* REG0A */
+ [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
+ [F_BOOSTI] = REG_FIELD(0x0A, 0, 2), // reserved on BQ25895
+ [F_PFM_OTG_DIS] = REG_FIELD(0x0A, 3, 3), // BQ25896 only
+ /* REG0B */
+ [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
+ [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
+ [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
+ [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1), // reserved on BQ25896
+ [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
+ /* REG0C */
+ [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
+ [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
+ [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
+ [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
+ [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
+ /* REG0D */
+ [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
+ [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
+ /* REG0E */
+ [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
+ [F_BATV] = REG_FIELD(0x0E, 0, 6),
+ /* REG0F */
+ [F_SYSV] = REG_FIELD(0x0F, 0, 6),
+ /* REG10 */
+ [F_TSPCT] = REG_FIELD(0x10, 0, 6),
+ /* REG11 */
+ [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
+ [F_VBUSV] = REG_FIELD(0x11, 0, 6),
+ /* REG12 */
+ [F_ICHGR] = REG_FIELD(0x12, 0, 6),
+ /* REG13 */
+ [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
+ [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
+ [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
+ /* REG14 */
+ [F_REG_RST] = REG_FIELD(0x14, 7, 7),
+ [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
+ [F_PN] = REG_FIELD(0x14, 3, 5),
+ [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
+ [F_DEV_REV] = REG_FIELD(0x14, 0, 1)
+};
+
+/*
+ * Most of the val -> idx conversions can be computed, given the minimum,
+ * maximum and the step between values. For the rest of conversions, we use
+ * lookup tables.
+ */
+enum bq25890_table_ids {
+ /* range tables */
+ TBL_ICHG,
+ TBL_ITERM,
+ TBL_IINLIM,
+ TBL_VREG,
+ TBL_BOOSTV,
+ TBL_SYSVMIN,
+ TBL_VBUSV,
+ TBL_VBATCOMP,
+ TBL_RBATCOMP,
+
+ /* lookup tables */
+ TBL_TREG,
+ TBL_BOOSTI,
+ TBL_TSPCT,
+};
+
+/* Thermal Regulation Threshold lookup table, in degrees Celsius */
+static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
+
+#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
+
+/* Boost mode current limit lookup table, in uA */
+static const u32 bq25890_boosti_tbl[] = {
+ 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
+};
+
+#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
+
+/* NTC 10K temperature lookup table in tenths of a degree */
+static const u32 bq25890_tspct_tbl[] = {
+ 850, 840, 830, 820, 810, 800, 790, 780,
+ 770, 760, 750, 740, 730, 720, 710, 700,
+ 690, 685, 680, 675, 670, 660, 650, 645,
+ 640, 630, 620, 615, 610, 600, 590, 585,
+ 580, 570, 565, 560, 550, 540, 535, 530,
+ 520, 515, 510, 500, 495, 490, 480, 475,
+ 470, 460, 455, 450, 440, 435, 430, 425,
+ 420, 410, 405, 400, 390, 385, 380, 370,
+ 365, 360, 355, 350, 340, 335, 330, 320,
+ 310, 305, 300, 290, 285, 280, 275, 270,
+ 260, 250, 245, 240, 230, 225, 220, 210,
+ 205, 200, 190, 180, 175, 170, 160, 150,
+ 145, 140, 130, 120, 115, 110, 100, 90,
+ 80, 70, 60, 50, 40, 30, 20, 10,
+ 0, -10, -20, -30, -40, -60, -70, -80,
+ -90, -10, -120, -140, -150, -170, -190, -210,
+};
+
+#define BQ25890_TSPCT_TBL_SIZE ARRAY_SIZE(bq25890_tspct_tbl)
+
+struct bq25890_range {
+ u32 min;
+ u32 max;
+ u32 step;
+};
+
+struct bq25890_lookup {
+ const u32 *tbl;
+ u32 size;
+};
+
+static const union {
+ struct bq25890_range rt;
+ struct bq25890_lookup lt;
+} bq25890_tables[] = {
+ /* range tables */
+ /* TODO: BQ25896 has max ICHG 3008 mA */
+ [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
+ [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
+ [TBL_IINLIM] = { .rt = {100000, 3250000, 50000} }, /* uA */
+ [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
+ [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
+ [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
+ [TBL_VBUSV] = { .rt = {2600000, 15300000, 100000} }, /* uV */
+ [TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */
+ [TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */
+
+ /* lookup tables */
+ [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
+ [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} },
+ [TBL_TSPCT] = { .lt = {bq25890_tspct_tbl, BQ25890_TSPCT_TBL_SIZE} }
+};
+
+static int bq25890_field_read(struct bq25890_device *bq,
+ enum bq25890_fields field_id)
+{
+ int ret;
+ int val;
+
+ ret = regmap_field_read(bq->rmap_fields[field_id], &val);
+ if (ret < 0)
+ return ret;
+
+ return val;
+}
+
+static int bq25890_field_write(struct bq25890_device *bq,
+ enum bq25890_fields field_id, u8 val)
+{
+ return regmap_field_write(bq->rmap_fields[field_id], val);
+}
+
+static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
+{
+ u8 idx;
+
+ if (id >= TBL_TREG) {
+ const u32 *tbl = bq25890_tables[id].lt.tbl;
+ u32 tbl_size = bq25890_tables[id].lt.size;
+
+ for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
+ ;
+ } else {
+ const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
+ u8 rtbl_size;
+
+ rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
+
+ for (idx = 1;
+ idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
+ idx++)
+ ;
+ }
+
+ return idx - 1;
+}
+
+static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
+{
+ const struct bq25890_range *rtbl;
+
+ /* lookup table? */
+ if (id >= TBL_TREG)
+ return bq25890_tables[id].lt.tbl[idx];
+
+ /* range table */
+ rtbl = &bq25890_tables[id].rt;
+
+ return (rtbl->min + idx * rtbl->step);
+}
+
+enum bq25890_status {
+ STATUS_NOT_CHARGING,
+ STATUS_PRE_CHARGING,
+ STATUS_FAST_CHARGING,
+ STATUS_TERMINATION_DONE,
+};
+
+enum bq25890_chrg_fault {
+ CHRG_FAULT_NORMAL,
+ CHRG_FAULT_INPUT,
+ CHRG_FAULT_THERMAL_SHUTDOWN,
+ CHRG_FAULT_TIMER_EXPIRED,
+};
+
+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 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;
+ 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 && 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);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!state.online)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (state.chrg_status == STATUS_NOT_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ else if (state.chrg_status == STATUS_PRE_CHARGING ||
+ state.chrg_status == STATUS_FAST_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (state.chrg_status == STATUS_TERMINATION_DONE)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ if (!state.online || 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;
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ else if (state.bat_fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ else
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = bq25890_find_val(bq->init_data.ichg, 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_VOLTAGE:
+ if (!state.online) {
+ val->intval = 0;
+ break;
+ }
+
+ ret = bq25890_field_read(bq, F_BATV); /* read measured value */
+ if (ret < 0)
+ return ret;
+
+ /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
+ val->intval = 2304000 + ret * 20000;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = bq25890_find_val(bq->init_data.vreg, TBL_VREG);
+ break;
+
+ case POWER_SUPPLY_PROP_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_VOLTAGE_NOW:
+ ret = bq25890_field_read(bq, F_SYSV); /* read measured value */
+ if (ret < 0)
+ return ret;
+
+ /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
+ val->intval = 2304000 + ret * 20000;
+ break;
+
+ case POWER_SUPPLY_PROP_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_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);
+ u8 lval;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ lval = bq25890_find_idx(val->intval, TBL_IINLIM);
+ return bq25890_field_write(bq, F_IINLIM, lval);
+ 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_INPUT_CURRENT_LIMIT:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/* 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_find_idx(2000000, TBL_IINLIM);
+ 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_find_idx(1500000, TBL_IINLIM);
+ break;
+ case POWER_SUPPLY_USB_TYPE_SDP:
+ default:
+ input_current_limit = bq25890_find_idx(500000, TBL_IINLIM);
+ }
+
+ 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_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/VSYS=%d/%d/%d, F:CHG/BOOST/BAT/NTC=%d/%d/%d/%d\n",
+ state->chrg_status, state->online, 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)
+{
+ 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;
+
+ if (!new_state.online && bq->state.online) { /* power removed */
+ /* disable ADC */
+ ret = bq25890_field_write(bq, F_CONV_RATE, 0);
+ if (ret < 0)
+ goto error;
+ } else if (new_state.online && !bq->state.online) { /* power inserted */
+ /* enable ADC, to have control of charge current/voltage */
+ ret = bq25890_field_write(bq, F_CONV_RATE, 1);
+ 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);
+ 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_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 = {
+ .name = "bq25890-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = bq25890_power_supply_props,
+ .num_properties = ARRAY_SIZE(bq25890_power_supply_props),
+ .get_property = bq25890_power_supply_get_property,
+ .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, };
+
+ 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,
+ &bq25890_power_supply_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);
+ int voltage, i, ret;
+
+ dev_dbg(bq->dev, "Start to request input voltage increasing\n");
+
+ /* 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);
+
+ 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);
+
+ return bq25890_set_otg_cfg(bq, 1);
+}
+
+static int bq25890_vbus_disable(struct regulator_dev *rdev)
+{
+ struct bq25890_device *bq = rdev_get_drvdata(rdev);
+
+ return bq25890_set_otg_cfg(bq, 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 const struct regulator_ops bq25890_vbus_ops = {
+ .enable = bq25890_vbus_enable,
+ .disable = bq25890_vbus_disable,
+ .is_enabled = bq25890_vbus_is_enabled,
+};
+
+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,
+ .fixed_uV = 5000000,
+ .n_voltages = 1,
+};
+
+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 (!IS_ERR_OR_NULL(bq->usb_phy))
+ return 0;
+
+ 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");
+ }
+
+ 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;
+
+ /* 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);
+
+ 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);
+}
+
+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;
+
+ 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;
+
+ if (!IS_ERR_OR_NULL(bq->usb_phy)) {
+ INIT_WORK(&bq->usb_work, bq25890_usb_work);
+ bq->usb_nb.notifier_call = bq25890_usb_notifier;
+ usb_register_notifier(bq->usb_phy, &bq->usb_nb);
+ }
+
+ ret = bq25890_power_supply_init(bq);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register power supply\n");
+ goto err_unregister_usb_notifier;
+ }
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ bq25890_irq_handler_thread,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ BQ25890_IRQ_PIN, bq);
+ if (ret)
+ goto err_unregister_usb_notifier;
+
+ return 0;
+
+err_unregister_usb_notifier:
+ if (!IS_ERR_OR_NULL(bq->usb_phy))
+ usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
+
+ return ret;
+}
+
+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);
+
+ 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");