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Release 4.11 drivers/power/supply/bq25890_charger.c

/*
 * TI BQ25890 charger driver
 *
 * Copyright (C) 2015 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/usb/phy.h>

#include <linux/acpi.h>
#include <linux/of.h>


#define BQ25890_MANUFACTURER		"Texas Instruments"

#define BQ25890_IRQ_PIN			"bq25890_irq"


#define BQ25890_ID			3


enum bq25890_fields {
	


F_EN_HIZ, F_EN_ILIM, F_IILIM,				     /* Reg00 */
	


F_BHOT, F_BCOLD, F_VINDPM_OFS,				     /* Reg01 */
	



F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
	



F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN,	     /* Reg02 */
	




F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN,    /* Reg03 */
	

F_PUMPX_EN, F_ICHG,					     /* Reg04 */
	

F_IPRECHG, F_ITERM,					     /* Reg05 */
	


F_VREG, F_BATLOWV, F_VRECHG,				     /* Reg06 */
	




F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
	
F_JEITA_ISET,						     /* Reg07 */
	


F_BATCMP, F_VCLAMP, F_TREG,				     /* Reg08 */
	



F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
	



F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN,	     /* Reg09 */
	

F_BOOSTV, F_BOOSTI,					     /* Reg0A */
	




F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT, /* Reg0B */
	



F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
	
F_NTC_FAULT,						     /* Reg0C */
	

F_FORCE_VINDPM, F_VINDPM,				     /* Reg0D */
	

F_THERM_STAT, F_BATV,					     /* Reg0E */
	
F_SYSV,							     /* Reg0F */
	
F_TSPCT,						     /* Reg10 */
	

F_VBUS_GD, F_VBUSV,					     /* Reg11 */
	
F_ICHGR,						     /* Reg12 */
	


F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM,			     /* Reg13 */
	




F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV,   /* Reg14 */

	
F_MAX_FIELDS
};

/* initial field values, converted to register values */

struct bq25890_init_data {
	
u8 ichg;	/* charge current               */
	
u8 vreg;	/* regulation voltage           */
	
u8 iterm;	/* termination current          */
	
u8 iprechg;	/* precharge current            */
	
u8 sysvmin;	/* minimum system voltage limit */
	
u8 boostv;	/* boost regulation voltage     */
	
u8 boosti;	/* boost current limit          */
	
u8 boostf;	/* boost frequency              */
	
u8 ilim_en;	/* enable ILIM pin              */
	
u8 treg;	/* thermal regulation threshold */
};


struct bq25890_state {
	
u8 online;
	
u8 chrg_status;
	
u8 chrg_fault;
	
u8 vsys_status;
	
u8 boost_fault;
	
u8 bat_fault;
};


struct bq25890_device {
	
struct i2c_client *client;
	
struct device *dev;
	
struct power_supply *charger;

	
struct usb_phy *usb_phy;
	
struct notifier_block usb_nb;
	
struct work_struct usb_work;
	
unsigned long usb_event;

	
struct regmap *rmap;
	
struct regmap_field *rmap_fields[F_MAX_FIELDS];

	
int chip_id;
	
struct bq25890_init_data init_data;
	
struct bq25890_state state;

	
struct mutex lock; /* protect state data */
};


static const struct regmap_range bq25890_readonly_reg_ranges[] = {
	regmap_reg_range(0x0b, 0x0c),
	regmap_reg_range(0x0e, 0x13),
};


static const struct regmap_access_table bq25890_writeable_regs = {
	.no_ranges = bq25890_readonly_reg_ranges,
	.n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
};


static const struct regmap_range bq25890_volatile_reg_ranges[] = {
	regmap_reg_range(0x00, 0x00),
	regmap_reg_range(0x09, 0x09),
	regmap_reg_range(0x0b, 0x0c),
	regmap_reg_range(0x0e, 0x14),
};


static const struct regmap_access_table bq25890_volatile_regs = {
	.yes_ranges = bq25890_volatile_reg_ranges,
	.n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
};


static const struct regmap_config bq25890_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = 0x14,
	.cache_type = REGCACHE_RBTREE,

	.wr_table = &bq25890_writeable_regs,
	.volatile_table = &bq25890_volatile_regs,
};


static const struct reg_field bq25890_reg_fields[] = {
	/* REG00 */
	[F_EN_HIZ]		= REG_FIELD(0x00, 7, 7),
	[F_EN_ILIM]		= REG_FIELD(0x00, 6, 6),
	[F_IILIM]		= REG_FIELD(0x00, 0, 5),
	/* REG01 */
	[F_BHOT]		= REG_FIELD(0x01, 6, 7),
	[F_BCOLD]		= REG_FIELD(0x01, 5, 5),
	[F_VINDPM_OFS]		= REG_FIELD(0x01, 0, 4),
	/* REG02 */
	[F_CONV_START]		= REG_FIELD(0x02, 7, 7),
	[F_CONV_RATE]		= REG_FIELD(0x02, 6, 6),
	[F_BOOSTF]		= REG_FIELD(0x02, 5, 5),
	[F_ICO_EN]		= REG_FIELD(0x02, 4, 4),
	[F_HVDCP_EN]		= REG_FIELD(0x02, 3, 3),
	[F_MAXC_EN]		= REG_FIELD(0x02, 2, 2),
	[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),
	/* REG04 */
	[F_PUMPX_EN]		= REG_FIELD(0x04, 7, 7),
	[F_ICHG]		= REG_FIELD(0x04, 0, 6),
	/* REG05 */
	[F_IPRECHG]		= REG_FIELD(0x05, 4, 7),
	[F_ITERM]		= REG_FIELD(0x05, 0, 3),
	/* REG06 */
	[F_VREG]		= REG_FIELD(0x06, 2, 7),
	[F_BATLOWV]		= REG_FIELD(0x06, 1, 1),
	[F_VRECHG]		= REG_FIELD(0x06, 0, 0),
	/* REG07 */
	[F_TERM_EN]		= REG_FIELD(0x07, 7, 7),
	[F_STAT_DIS]		= REG_FIELD(0x07, 6, 6),
	[F_WD]			= REG_FIELD(0x07, 4, 5),
	[F_TMR_EN]		= REG_FIELD(0x07, 3, 3),
	[F_CHG_TMR]		= REG_FIELD(0x07, 1, 2),
	[F_JEITA_ISET]		= REG_FIELD(0x07, 0, 0),
	/* REG08 */
	[F_BATCMP]		= REG_FIELD(0x08, 6, 7),
	[F_VCLAMP]		= REG_FIELD(0x08, 2, 4),
	[F_TREG]		= REG_FIELD(0x08, 0, 1),
	/* REG09 */
	[F_FORCE_ICO]		= REG_FIELD(0x09, 7, 7),
	[F_TMR2X_EN]		= REG_FIELD(0x09, 6, 6),
	[F_BATFET_DIS]		= REG_FIELD(0x09, 5, 5),
	[F_JEITA_VSET]		= REG_FIELD(0x09, 4, 4),
	[F_BATFET_DLY]		= REG_FIELD(0x09, 3, 3),
	[F_BATFET_RST_EN]	= REG_FIELD(0x09, 2, 2),
	[F_PUMPX_UP]		= REG_FIELD(0x09, 1, 1),
	[F_PUMPX_DN]		= REG_FIELD(0x09, 0, 0),
	/* REG0A */
	[F_BOOSTV]		= REG_FIELD(0x0A, 4, 7),
	[F_BOOSTI]		= REG_FIELD(0x0A, 0, 2),
	/* REG0B */
	[F_VBUS_STAT]		= REG_FIELD(0x0B, 5, 7),
	[F_CHG_STAT]		= REG_FIELD(0x0B, 3, 4),
	[F_PG_STAT]		= REG_FIELD(0x0B, 2, 2),
	[F_SDP_STAT]		= REG_FIELD(0x0B, 1, 1),
	[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_IPRECHG,
	
TBL_VREG,
	
TBL_BATCMP,
	
TBL_VCLAMP,
	
TBL_BOOSTV,
	
TBL_SYSVMIN,

	/* lookup tables */
	
TBL_TREG,
	
TBL_BOOSTI,
};

/* Thermal Regulation Threshold lookup table, in degrees Celsius */

static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };


#define BQ25890_TREG_TBL_SIZE		ARRAY_SIZE(bq25890_treg_tbl)

/* Boost mode current limit lookup table, in uA */

static const u32 bq25890_boosti_tbl[] = {
	500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
};


#define BQ25890_BOOSTI_TBL_SIZE		ARRAY_SIZE(bq25890_boosti_tbl)


struct bq25890_range {
	
u32 min;
	
u32 max;
	
u32 step;
};


struct bq25890_lookup {
	
const u32 *tbl;
	
u32 size;
};

static const union {
	
struct bq25890_range  rt;
	
struct bq25890_lookup lt;
} 
bq25890_tables[] = {
	/* range tables */
	[TBL_ICHG] =	{ .rt = {0,	  5056000, 64000} },	 /* uA */
	[TBL_ITERM] =	{ .rt = {64000,   1024000, 64000} },	 /* uA */
	[TBL_VREG] =	{ .rt = {3840000, 4608000, 16000} },	 /* uV */
	[TBL_BATCMP] =	{ .rt = {0,	  140,     20} },	 /* mOhm */
	[TBL_VCLAMP] =	{ .rt = {0,	  224000,  32000} },	 /* uV */
	[TBL_BOOSTV] =	{ .rt = {4550000, 5510000, 64000} },	 /* uV */
	[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} },	 /* uV */

	/* lookup tables */
	[TBL_TREG] =	{ .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
	[TBL_BOOSTI] =	{ .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
};


static int bq25890_field_read(struct bq25890_device *bq, enum bq25890_fields field_id) { int ret; int val; ret = regmap_field_read(bq->rmap_fields[field_id], &val); if (ret < 0) return ret; return val; }

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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); }

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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; }

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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); }

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enum bq25890_status { STATUS_NOT_CHARGING, STATUS_PRE_CHARGING, STATUS_FAST_CHARGING, STATUS_TERMINATION_DONE, }; enum bq25890_chrg_fault { CHRG_FAULT_NORMAL, CHRG_FAULT_INPUT, CHRG_FAULT_THERMAL_SHUTDOWN, CHRG_FAULT_TIMER_EXPIRED, };
static int bq25890_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { int ret; struct bq25890_device *bq = power_supply_get_drvdata(psy); struct bq25890_state state; mutex_lock(&bq->lock); state = bq->state; mutex_unlock(&bq->lock); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (!state.online) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (state.chrg_status == STATUS_NOT_CHARGING) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (state.chrg_status == STATUS_PRE_CHARGING || state.chrg_status == STATUS_FAST_CHARGING) val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (state.chrg_status == STATUS_TERMINATION_DONE) val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_UNKNOWN; break; case POWER_SUPPLY_PROP_MANUFACTURER: val->strval = BQ25890_MANUFACTURER; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = state.online; break; case POWER_SUPPLY_PROP_HEALTH: if (!state.chrg_fault && !state.bat_fault && !state.boost_fault) val->intval = POWER_SUPPLY_HEALTH_GOOD; else if (state.bat_fault) val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED) val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */ if (ret < 0) return ret; /* converted_val = ADC_val * 50mA (table 10.3.19) */ val->intval = ret * 50000; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: val->intval = bq25890_tables[TBL_ICHG].rt.max; 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_tables[TBL_VREG].rt.max; break; case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM); break; default: return -EINVAL; } return 0; }

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static int bq25890_get_chip_state(struct bq25890_device *bq, struct bq25890_state *state) { int i, ret; struct { enum bq25890_fields id; u8 *data; } state_fields[] = { {F_CHG_STAT, &state->chrg_status}, {F_PG_STAT, &state->online}, {F_VSYS_STAT, &state->vsys_status}, {F_BOOST_FAULT, &state->boost_fault}, {F_BAT_FAULT, &state->bat_fault}, {F_CHG_FAULT, &state->chrg_fault} }; for (i = 0; i < ARRAY_SIZE(state_fields); i++) { ret = bq25890_field_read(bq, state_fields[i].id); if (ret < 0) return ret; *state_fields[i].data = ret; } dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n", state->chrg_status, state->online, state->vsys_status, state->chrg_fault, state->boost_fault, state->bat_fault); return 0; }

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static bool bq25890_state_changed(struct bq25890_device *bq, struct bq25890_state *new_state) { struct bq25890_state old_state; mutex_lock(&bq->lock); old_state = bq->state; mutex_unlock(&bq->lock); return (old_state.chrg_status != new_state->chrg_status || old_state.chrg_fault != new_state->chrg_fault || old_state.online != new_state->online || old_state.bat_fault != new_state->bat_fault || old_state.boost_fault != new_state->boost_fault || old_state.vsys_status != new_state->vsys_status); }

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static void bq25890_handle_state_change(struct bq25890_device *bq, struct bq25890_state *new_state) { int ret; struct bq25890_state old_state; mutex_lock(&bq->lock); old_state = bq->state; mutex_unlock(&bq->lock); if (!new_state->online) { /* power removed */ /* disable ADC */ ret = bq25890_field_write(bq, F_CONV_START, 0); if (ret < 0) goto error; } else if (!old_state.online) { /* power inserted */ /* enable ADC, to have control of charge current/voltage */ ret = bq25890_field_write(bq, F_CONV_START, 1); if (ret < 0) goto error; } return; error: dev_err(bq->dev, "Error communicating with the chip.\n"); }

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static irqreturn_t bq25890_irq_handler_thread(int irq, void *private) { struct bq25890_device *bq = private; int ret; struct bq25890_state state; ret = bq25890_get_chip_state(bq, &state); if (ret < 0) goto handled; if (!bq25890_state_changed(bq, &state)) goto handled; bq25890_handle_state_change(bq, &state); mutex_lock(&bq->lock); bq->state = state; mutex_unlock(&bq->lock); power_supply_changed(bq->charger); handled: return IRQ_HANDLED; }

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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; }

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static int bq25890_hw_init(struct bq25890_device *bq) { int ret; int i; struct bq25890_state state; const struct { enum bq25890_fields id; u32 value; } init_data[] = { {F_ICHG, bq->init_data.ichg}, {F_VREG, bq->init_data.vreg}, {F_ITERM, bq->init_data.iterm}, {F_IPRECHG, bq->init_data.iprechg}, {F_SYSVMIN, bq->init_data.sysvmin}, {F_BOOSTV, bq->init_data.boostv}, {F_BOOSTI, bq->init_data.boosti}, {F_BOOSTF, bq->init_data.boostf}, {F_EN_ILIM, bq->init_data.ilim_en}, {F_TREG, bq->init_data.treg} }; ret = bq25890_chip_reset(bq); if (ret < 0) return ret; /* disable watchdog */ ret = bq25890_field_write(bq, F_WD, 0); if (ret < 0) return ret; /* initialize currents/voltages and other parameters */ for (i = 0; i < ARRAY_SIZE(init_data); i++) { ret = bq25890_field_write(bq, init_data[i].id, init_data[i].value); if (ret < 0) return ret; } /* Configure ADC for continuous conversions. This does not enable it. */ ret = bq25890_field_write(bq, F_CONV_RATE, 1); if (ret < 0) return ret; ret = bq25890_get_chip_state(bq, &state); if (ret < 0) return ret; mutex_lock(&bq->lock); bq->state = state; mutex_unlock(&bq->lock); return 0; }

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static enum power_supply_property bq25890_power_supply_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, }; static char *bq25890_charger_supplied_to[] = { "main-battery", }; static const struct power_supply_desc bq25890_power_supply_desc = { .name = "bq25890-charger", .type = POWER_SUPPLY_TYPE_USB, .properties = bq25890_power_supply_props, .num_properties = ARRAY_SIZE(bq25890_power_supply_props), .get_property = bq25890_power_supply_get_property, };
static int bq25890_power_supply_init(struct bq25890_device *bq) { struct power_supply_config psy_cfg = { .drv_data = bq, }; psy_cfg.supplied_to = bq25890_charger_supplied_to; psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to); bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc, &psy_cfg); return PTR_ERR_OR_ZERO(bq->charger); }

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Laurentiu Palcu62100.00%1100.00%
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static void bq25890_usb_work(struct work_struct *data) { int ret; struct bq25890_device *bq = container_of(data, struct bq25890_device, usb_work); switch (bq->usb_event) { case USB_EVENT_ID: /* Enable boost mode */ ret = bq25890_field_write(bq, F_OTG_CFG, 1); if (ret < 0) goto error; break; case USB_EVENT_NONE: /* Disable boost mode */ ret = bq25890_field_write(bq, F_OTG_CFG, 0); if (ret < 0) goto error; power_supply_changed(bq->charger); break; } return; error: dev_err(bq->dev, "Error switching to boost/charger mode.\n"); }

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Laurentiu Palcu106100.00%1100.00%
Total106100.00%1100.00%


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; }

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Laurentiu Palcu53100.00%1100.00%
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static int bq25890_irq_probe(struct bq25890_device *bq) { struct gpio_desc *irq; irq = devm_gpiod_get_index(bq->dev, BQ25890_IRQ_PIN, 0, GPIOD_IN); if (IS_ERR(irq)) { dev_err(bq->dev, "Could not probe irq pin.\n"); return PTR_ERR(irq); } return gpiod_to_irq(irq); }

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Laurentiu Palcu5996.72%150.00%
Uwe Kleine-König23.28%150.00%
Total61100.00%2100.00%


static int bq25890_fw_read_u32_props(struct bq25890_device *bq) { int ret; u32 property; int i; struct bq25890_init_data *init = &bq->init_data; struct { char *name; bool optional; enum bq25890_table_ids tbl_id; u8 *conv_data; /* holds converted value from given property */ } props[] = { /* required properties */ {"ti,charge-current", false, TBL_ICHG, &init->ichg}, {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg}, {"ti,termination-current", false, TBL_ITERM, &init->iterm}, {"ti,precharge-current", false, TBL_ITERM, &init->iprechg}, {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin}, {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv}, {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti}, /* optional properties */ {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg} }; /* initialize data for optional properties */ init->treg = 3; /* 120 degrees Celsius */ for (i = 0; i < ARRAY_SIZE(props); i++) { ret = device_property_read_u32(bq->dev, props[i].name, &property); if (ret < 0) { if (props[i].optional) continue; return ret; } *props[i].conv_data = bq25890_find_idx(property, props[i].tbl_id); } return 0; }

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Laurentiu Palcu249100.00%1100.00%
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static int bq25890_fw_probe(struct bq25890_device *bq) { int ret; struct bq25890_init_data *init = &bq->init_data; ret = bq25890_fw_read_u32_props(bq); if (ret < 0) return ret; init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin"); init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq"); return 0; }

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Laurentiu Palcu69100.00%1100.00%
Total69100.00%1100.00%


static int bq25890_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); struct device *dev = &client->dev; struct bq25890_device *bq; int ret; int i; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(dev, "No support for SMBUS_BYTE_DATA\n"); return -ENODEV; } bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL); if (!bq) return -ENOMEM; bq->client = client; bq->dev = dev; mutex_init(&bq->lock); bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config); if (IS_ERR(bq->rmap)) { dev_err(dev, "failed to allocate register map\n"); return PTR_ERR(bq->rmap); } for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) { const struct reg_field *reg_fields = bq25890_reg_fields; bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap, reg_fields[i]); if (IS_ERR(bq->rmap_fields[i])) { dev_err(dev, "cannot allocate regmap field\n"); return PTR_ERR(bq->rmap_fields[i]); } } i2c_set_clientdata(client, bq); bq->chip_id = bq25890_field_read(bq, F_PN); if (bq->chip_id < 0) { dev_err(dev, "Cannot read chip ID.\n"); return bq->chip_id; } if (bq->chip_id != BQ25890_ID) { dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id); return -ENODEV; } if (!dev->platform_data) { ret = bq25890_fw_probe(bq); if (ret < 0) { dev_err(dev, "Cannot read device properties.\n"); return ret; } } else { return -ENODEV; } ret = bq25890_hw_init(bq); if (ret < 0) { dev_err(dev, "Cannot initialize the chip.\n"); return ret; } if (client->irq <= 0) client->irq = bq25890_irq_probe(bq); if (client->irq < 0) { dev_err(dev, "No irq resource found.\n"); return client->irq; } /* OTG reporting */ bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); if (!IS_ERR_OR_NULL(bq->usb_phy)) { INIT_WORK(&bq->usb_work, bq25890_usb_work); bq->usb_nb.notifier_call = bq25890_usb_notifier; usb_register_notifier(bq->usb_phy, &bq->usb_nb); } ret = devm_request_threaded_irq(dev, client->irq, NULL, bq25890_irq_handler_thread, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, BQ25890_IRQ_PIN, bq); if (ret) goto irq_fail; ret = bq25890_power_supply_init(bq); if (ret < 0) { dev_err(dev, "Failed to register power supply\n"); goto irq_fail; } return 0; irq_fail: if (!IS_ERR_OR_NULL(bq->usb_phy)) usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); return ret; }

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Laurentiu Palcu545100.00%2100.00%
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static int bq25890_remove(struct i2c_client *client) { struct bq25890_device *bq = i2c_get_clientdata(client); power_supply_unregister(bq->charger); if (!IS_ERR_OR_NULL(bq->usb_phy)) usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); /* reset all registers to default values */ bq25890_chip_reset(bq); return 0; }

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Laurentiu Palcu59100.00%1100.00%
Total59100.00%1100.00%

#ifdef CONFIG_PM_SLEEP
static int bq25890_suspend(struct device *dev) { struct bq25890_device *bq = dev_get_drvdata(dev); /* * If charger is removed, while in suspend, make sure ADC is diabled * since it consumes slightly more power. */ return bq25890_field_write(bq, F_CONV_START, 0); }

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Laurentiu Palcu32100.00%1100.00%
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static int bq25890_resume(struct device *dev) { int ret; struct bq25890_state state; struct bq25890_device *bq = dev_get_drvdata(dev); ret = bq25890_get_chip_state(bq, &state); if (ret < 0) return ret; mutex_lock(&bq->lock); bq->state = state; mutex_unlock(&bq->lock); /* Re-enable ADC only if charger is plugged in. */ if (state.online) { ret = bq25890_field_write(bq, F_CONV_START, 1); if (ret < 0) return ret; } /* signal userspace, maybe state changed while suspended */ power_supply_changed(bq->charger); return 0; }

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Laurentiu Palcu109100.00%1100.00%
Total109100.00%1100.00%

#endif static const struct dev_pm_ops bq25890_pm = { SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume) }; static const struct i2c_device_id bq25890_i2c_ids[] = { { "bq25890", 0 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids); static const struct of_device_id bq25890_of_match[] = { { .compatible = "ti,bq25890", }, { }, }; MODULE_DEVICE_TABLE(of, bq25890_of_match); static const struct acpi_device_id bq25890_acpi_match[] = { {"BQ258900", 0}, {}, }; MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match); static struct i2c_driver bq25890_driver = { .driver = { .name = "bq25890-charger", .of_match_table = of_match_ptr(bq25890_of_match), .acpi_match_table = ACPI_PTR(bq25890_acpi_match), .pm = &bq25890_pm, }, .probe = bq25890_probe, .remove = bq25890_remove, .id_table = bq25890_i2c_ids, }; module_i2c_driver(bq25890_driver); MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>"); MODULE_DESCRIPTION("bq25890 charger driver"); MODULE_LICENSE("GPL");

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Laurentiu Palcu488299.96%266.67%
Uwe Kleine-König20.04%133.33%
Total4884100.00%3100.00%
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