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Release 4.11 drivers/power/supply/bq24257_charger.c

/*
 * TI BQ24257 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.
 *
 * Datasheets:
 * http://www.ti.com/product/bq24250
 * http://www.ti.com/product/bq24251
 * http://www.ti.com/product/bq24257
 */

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


#define BQ24257_REG_1			0x00

#define BQ24257_REG_2			0x01

#define BQ24257_REG_3			0x02

#define BQ24257_REG_4			0x03

#define BQ24257_REG_5			0x04

#define BQ24257_REG_6			0x05

#define BQ24257_REG_7			0x06


#define BQ24257_MANUFACTURER		"Texas Instruments"

#define BQ24257_PG_GPIO			"pg"


#define BQ24257_ILIM_SET_DELAY		1000	
/* msec */

/*
 * When adding support for new devices make sure that enum bq2425x_chip and
 * bq2425x_chip_name[] always stay in sync!
 */

enum bq2425x_chip {
	
BQ24250,
	
BQ24251,
	
BQ24257,
};


static const char *const bq2425x_chip_name[] = {
	"bq24250",
	"bq24251",
	"bq24257",
};


enum bq24257_fields {
	



F_WD_FAULT, F_WD_EN, F_STAT, F_FAULT,			    /* REG 1 */
	





F_RESET, F_IILIMIT, F_EN_STAT, F_EN_TERM, F_CE, F_HZ_MODE,  /* REG 2 */
	

F_VBAT, F_USB_DET,					    /* REG 3 */
	

F_ICHG, F_ITERM,					    /* REG 4 */
	




F_LOOP_STATUS, F_LOW_CHG, F_DPDM_EN, F_CE_STATUS, F_VINDPM, /* REG 5 */
	




F_X2_TMR_EN, F_TMR, F_SYSOFF, F_TS_EN, F_TS_STAT,	    /* REG 6 */
	



F_VOVP, F_CLR_VDP, F_FORCE_BATDET, F_FORCE_PTM,		    /* REG 7 */

	
F_MAX_FIELDS
};

/* initial field values, converted from uV/uA */

struct bq24257_init_data {
	
u8 ichg;	/* charge current      */
	
u8 vbat;	/* regulation voltage  */
	
u8 iterm;	/* termination current */
	
u8 iilimit;	/* input current limit */
	
u8 vovp;	/* over voltage protection voltage */
	
u8 vindpm;	/* VDMP input threshold voltage */
};


struct bq24257_state {
	
u8 status;
	
u8 fault;
	
bool power_good;
};


struct bq24257_device {
	
struct i2c_client *client;
	
struct device *dev;
	
struct power_supply *charger;

	
enum bq2425x_chip chip;

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

	
struct gpio_desc *pg;

	
struct delayed_work iilimit_setup_work;

	
struct bq24257_init_data init_data;
	
struct bq24257_state state;

	
struct mutex lock; /* protect state data */

	
bool iilimit_autoset_enable;
};


static bool bq24257_is_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case BQ24257_REG_2: case BQ24257_REG_4: return false; default: return true; } }

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static const struct regmap_config bq24257_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = BQ24257_REG_7, .cache_type = REGCACHE_RBTREE, .volatile_reg = bq24257_is_volatile_reg, }; static const struct reg_field bq24257_reg_fields[] = { /* REG 1 */ [F_WD_FAULT] = REG_FIELD(BQ24257_REG_1, 7, 7), [F_WD_EN] = REG_FIELD(BQ24257_REG_1, 6, 6), [F_STAT] = REG_FIELD(BQ24257_REG_1, 4, 5), [F_FAULT] = REG_FIELD(BQ24257_REG_1, 0, 3), /* REG 2 */ [F_RESET] = REG_FIELD(BQ24257_REG_2, 7, 7), [F_IILIMIT] = REG_FIELD(BQ24257_REG_2, 4, 6), [F_EN_STAT] = REG_FIELD(BQ24257_REG_2, 3, 3), [F_EN_TERM] = REG_FIELD(BQ24257_REG_2, 2, 2), [F_CE] = REG_FIELD(BQ24257_REG_2, 1, 1), [F_HZ_MODE] = REG_FIELD(BQ24257_REG_2, 0, 0), /* REG 3 */ [F_VBAT] = REG_FIELD(BQ24257_REG_3, 2, 7), [F_USB_DET] = REG_FIELD(BQ24257_REG_3, 0, 1), /* REG 4 */ [F_ICHG] = REG_FIELD(BQ24257_REG_4, 3, 7), [F_ITERM] = REG_FIELD(BQ24257_REG_4, 0, 2), /* REG 5 */ [F_LOOP_STATUS] = REG_FIELD(BQ24257_REG_5, 6, 7), [F_LOW_CHG] = REG_FIELD(BQ24257_REG_5, 5, 5), [F_DPDM_EN] = REG_FIELD(BQ24257_REG_5, 4, 4), [F_CE_STATUS] = REG_FIELD(BQ24257_REG_5, 3, 3), [F_VINDPM] = REG_FIELD(BQ24257_REG_5, 0, 2), /* REG 6 */ [F_X2_TMR_EN] = REG_FIELD(BQ24257_REG_6, 7, 7), [F_TMR] = REG_FIELD(BQ24257_REG_6, 5, 6), [F_SYSOFF] = REG_FIELD(BQ24257_REG_6, 4, 4), [F_TS_EN] = REG_FIELD(BQ24257_REG_6, 3, 3), [F_TS_STAT] = REG_FIELD(BQ24257_REG_6, 0, 2), /* REG 7 */ [F_VOVP] = REG_FIELD(BQ24257_REG_7, 5, 7), [F_CLR_VDP] = REG_FIELD(BQ24257_REG_7, 4, 4), [F_FORCE_BATDET] = REG_FIELD(BQ24257_REG_7, 3, 3), [F_FORCE_PTM] = REG_FIELD(BQ24257_REG_7, 2, 2) }; static const u32 bq24257_vbat_map[] = { 3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000, 3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000, 3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000, 3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000, 4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4320000, 4340000, 4360000, 4380000, 4400000, 4420000, 4440000 }; #define BQ24257_VBAT_MAP_SIZE ARRAY_SIZE(bq24257_vbat_map) static const u32 bq24257_ichg_map[] = { 500000, 550000, 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000, 2000000 }; #define BQ24257_ICHG_MAP_SIZE ARRAY_SIZE(bq24257_ichg_map) static const u32 bq24257_iterm_map[] = { 50000, 75000, 100000, 125000, 150000, 175000, 200000, 225000 }; #define BQ24257_ITERM_MAP_SIZE ARRAY_SIZE(bq24257_iterm_map) static const u32 bq24257_iilimit_map[] = { 100000, 150000, 500000, 900000, 1500000, 2000000 }; #define BQ24257_IILIMIT_MAP_SIZE ARRAY_SIZE(bq24257_iilimit_map) static const u32 bq24257_vovp_map[] = { 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000, 10500000 }; #define BQ24257_VOVP_MAP_SIZE ARRAY_SIZE(bq24257_vovp_map) static const u32 bq24257_vindpm_map[] = { 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000, 4760000 }; #define BQ24257_VINDPM_MAP_SIZE ARRAY_SIZE(bq24257_vindpm_map)
static int bq24257_field_read(struct bq24257_device *bq, enum bq24257_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 bq24257_field_write(struct bq24257_device *bq, enum bq24257_fields field_id, u8 val) { return regmap_field_write(bq->rmap_fields[field_id], val); }

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static u8 bq24257_find_idx(u32 value, const u32 *map, u8 map_size) { u8 idx; for (idx = 1; idx < map_size; idx++) if (value < map[idx]) break; return idx - 1; }

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enum bq24257_status { STATUS_READY, STATUS_CHARGE_IN_PROGRESS, STATUS_CHARGE_DONE, STATUS_FAULT, }; enum bq24257_fault { FAULT_NORMAL, FAULT_INPUT_OVP, FAULT_INPUT_UVLO, FAULT_SLEEP, FAULT_BAT_TS, FAULT_BAT_OVP, FAULT_TS, FAULT_TIMER, FAULT_NO_BAT, FAULT_ISET, FAULT_INPUT_LDO_LOW, };
static int bq24257_get_input_current_limit(struct bq24257_device *bq, union power_supply_propval *val) { int ret; ret = bq24257_field_read(bq, F_IILIMIT); if (ret < 0) return ret; /* * The "External ILIM" and "Production & Test" modes are not exposed * through this driver and not being covered by the lookup table. * Should such a mode have become active let's return an error rather * than exceeding the bounds of the lookup table and returning * garbage. */ if (ret >= BQ24257_IILIMIT_MAP_SIZE) return -ENODATA; val->intval = bq24257_iilimit_map[ret]; return 0; }

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static int bq24257_set_input_current_limit(struct bq24257_device *bq, const union power_supply_propval *val) { /* * Address the case where the user manually sets an input current limit * while the charger auto-detection mechanism is is active. In this * case we want to abort and go straight to the user-specified value. */ if (bq->iilimit_autoset_enable) cancel_delayed_work_sync(&bq->iilimit_setup_work); return bq24257_field_write(bq, F_IILIMIT, bq24257_find_idx(val->intval, bq24257_iilimit_map, BQ24257_IILIMIT_MAP_SIZE)); }

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static int bq24257_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct bq24257_device *bq = power_supply_get_drvdata(psy); struct bq24257_state state; mutex_lock(&bq->lock); state = bq->state; mutex_unlock(&bq->lock); switch (psp) { case POWER_SUPPLY_PROP_STATUS: if (!state.power_good) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else if (state.status == STATUS_READY) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (state.status == STATUS_CHARGE_IN_PROGRESS) val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (state.status == STATUS_CHARGE_DONE) val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_UNKNOWN; break; case POWER_SUPPLY_PROP_MANUFACTURER: val->strval = BQ24257_MANUFACTURER; break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = bq2425x_chip_name[bq->chip]; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = state.power_good; break; case POWER_SUPPLY_PROP_HEALTH: switch (state.fault) { case FAULT_NORMAL: val->intval = POWER_SUPPLY_HEALTH_GOOD; break; case FAULT_INPUT_OVP: case FAULT_BAT_OVP: val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; break; case FAULT_TS: case FAULT_BAT_TS: val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; break; case FAULT_TIMER: val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE; break; default: val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; break; } break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: val->intval = bq24257_ichg_map[bq->init_data.ichg]; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: val->intval = bq24257_ichg_map[BQ24257_ICHG_MAP_SIZE - 1]; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: val->intval = bq24257_vbat_map[bq->init_data.vbat]; break; case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: val->intval = bq24257_vbat_map[BQ24257_VBAT_MAP_SIZE - 1]; break; case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: val->intval = bq24257_iterm_map[bq->init_data.iterm]; break; case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: return bq24257_get_input_current_limit(bq, val); default: return -EINVAL; } return 0; }

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static int bq24257_power_supply_set_property(struct power_supply *psy, enum power_supply_property prop, const union power_supply_propval *val) { struct bq24257_device *bq = power_supply_get_drvdata(psy); switch (prop) { case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: return bq24257_set_input_current_limit(bq, val); default: return -EINVAL; } }

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static int bq24257_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; } }

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static int bq24257_get_chip_state(struct bq24257_device *bq, struct bq24257_state *state) { int ret; ret = bq24257_field_read(bq, F_STAT); if (ret < 0) return ret; state->status = ret; ret = bq24257_field_read(bq, F_FAULT); if (ret < 0) return ret; state->fault = ret; if (bq->pg) state->power_good = !gpiod_get_value_cansleep(bq->pg); else /* * If we have a chip without a dedicated power-good GPIO or * some other explicit bit that would provide this information * assume the power is good if there is no supply related * fault - and not good otherwise. There is a possibility for * other errors to mask that power in fact is not good but this * is probably the best we can do here. */ switch (state->fault) { case FAULT_INPUT_OVP: case FAULT_INPUT_UVLO: case FAULT_INPUT_LDO_LOW: state->power_good = false; break; default: state->power_good = true; } return 0; }

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static bool bq24257_state_changed(struct bq24257_device *bq, struct bq24257_state *new_state) { int ret; mutex_lock(&bq->lock); ret = (bq->state.status != new_state->status || bq->state.fault != new_state->fault || bq->state.power_good != new_state->power_good); mutex_unlock(&bq->lock); return ret; }

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enum bq24257_loop_status { LOOP_STATUS_NONE, LOOP_STATUS_IN_DPM, LOOP_STATUS_IN_CURRENT_LIMIT, LOOP_STATUS_THERMAL, }; enum bq24257_in_ilimit { IILIMIT_100, IILIMIT_150, IILIMIT_500, IILIMIT_900, IILIMIT_1500, IILIMIT_2000, IILIMIT_EXT, IILIMIT_NONE, }; enum bq24257_vovp { VOVP_6000, VOVP_6500, VOVP_7000, VOVP_8000, VOVP_9000, VOVP_9500, VOVP_10000, VOVP_10500 }; enum bq24257_vindpm { VINDPM_4200, VINDPM_4280, VINDPM_4360, VINDPM_4440, VINDPM_4520, VINDPM_4600, VINDPM_4680, VINDPM_4760 }; enum bq24257_port_type { PORT_TYPE_DCP, /* Dedicated Charging Port */ PORT_TYPE_CDP, /* Charging Downstream Port */ PORT_TYPE_SDP, /* Standard Downstream Port */ PORT_TYPE_NON_STANDARD, }; enum bq24257_safety_timer { SAFETY_TIMER_45, SAFETY_TIMER_360, SAFETY_TIMER_540, SAFETY_TIMER_NONE, };
static int bq24257_iilimit_autoset(struct bq24257_device *bq) { int loop_status; int iilimit; int port_type; int ret; const u8 new_iilimit[] = { [PORT_TYPE_DCP] = IILIMIT_2000, [PORT_TYPE_CDP] = IILIMIT_2000, [PORT_TYPE_SDP] = IILIMIT_500, [PORT_TYPE_NON_STANDARD] = IILIMIT_500 }; ret = bq24257_field_read(bq, F_LOOP_STATUS); if (ret < 0) goto error; loop_status = ret; ret = bq24257_field_read(bq, F_IILIMIT); if (ret < 0) goto error; iilimit = ret; /* * All USB ports should be able to handle 500mA. If not, DPM will lower * the charging current to accommodate the power source. No need to set * a lower IILIMIT value. */ if (loop_status == LOOP_STATUS_IN_DPM && iilimit == IILIMIT_500) return 0; ret = bq24257_field_read(bq, F_USB_DET); if (ret < 0) goto error; port_type = ret; ret = bq24257_field_write(bq, F_IILIMIT, new_iilimit[port_type]); if (ret < 0) goto error; ret = bq24257_field_write(bq, F_TMR, SAFETY_TIMER_360); if (ret < 0) goto error; ret = bq24257_field_write(bq, F_CLR_VDP, 1); if (ret < 0) goto error; dev_dbg(bq->dev, "port/loop = %d/%d -> iilimit = %d\n", port_type, loop_status, new_iilimit[port_type]); return 0; error: dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__); return ret; }

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static void bq24257_iilimit_setup_work(struct work_struct *work) { struct bq24257_device *bq = container_of(work, struct bq24257_device, iilimit_setup_work.work); bq24257_iilimit_autoset(bq); }

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static void bq24257_handle_state_change(struct bq24257_device *bq, struct bq24257_state *new_state) { int ret; struct bq24257_state old_state; mutex_lock(&bq->lock); old_state = bq->state; mutex_unlock(&bq->lock); /* * Handle BQ2425x state changes observing whether the D+/D- based input * current limit autoset functionality is enabled. */ if (!new_state->power_good) { dev_dbg(bq->dev, "Power removed\n"); if (bq->iilimit_autoset_enable) { cancel_delayed_work_sync(&bq->iilimit_setup_work); /* activate D+/D- port detection algorithm */ ret = bq24257_field_write(bq, F_DPDM_EN, 1); if (ret < 0) goto error; } /* * When power is removed always return to the default input * current limit as configured during probe. */ ret = bq24257_field_write(bq, F_IILIMIT, bq->init_data.iilimit); if (ret < 0) goto error; } else if (!old_state.power_good) { dev_dbg(bq->dev, "Power inserted\n"); if (bq->iilimit_autoset_enable) /* configure input current limit */ schedule_delayed_work(&bq->iilimit_setup_work, msecs_to_jiffies(BQ24257_ILIM_SET_DELAY)); } else if (new_state->fault == FAULT_NO_BAT) { dev_warn(bq->dev, "Battery removed\n"); } else if (new_state->fault == FAULT_TIMER) { dev_err(bq->dev, "Safety timer expired! Battery dead?\n"); } return; error: dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__); }

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static irqreturn_t bq24257_irq_handler_thread(int irq, void *private) { int ret; struct bq24257_device *bq = private; struct bq24257_state state; ret = bq24257_get_chip_state(bq, &state); if (ret < 0) return IRQ_HANDLED; if (!bq24257_state_changed(bq, &state)) return IRQ_HANDLED; dev_dbg(bq->dev, "irq(state changed): status/fault/pg = %d/%d/%d\n", state.status, state.fault, state.power_good); bq24257_handle_state_change(bq, &state); mutex_lock(&bq->lock); bq->state = state; mutex_unlock(&bq->lock); power_supply_changed(bq->charger); return IRQ_HANDLED; }

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static int bq24257_hw_init(struct bq24257_device *bq) { int ret; int i; struct bq24257_state state; const struct { int field; u32 value; } init_data[] = { {F_ICHG, bq->init_data.ichg}, {F_VBAT, bq->init_data.vbat}, {F_ITERM, bq->init_data.iterm}, {F_VOVP, bq->init_data.vovp}, {F_VINDPM, bq->init_data.vindpm}, }; /* * Disable the watchdog timer to prevent the IC from going back to * default settings after 50 seconds of I2C inactivity. */ ret = bq24257_field_write(bq, F_WD_EN, 0); if (ret < 0) return ret; /* configure the charge currents and voltages */ for (i = 0; i < ARRAY_SIZE(init_data); i++) { ret = bq24257_field_write(bq, init_data[i].field, init_data[i].value); if (ret < 0) return ret; } ret = bq24257_get_chip_state(bq, &state); if (ret < 0) return ret; mutex_lock(&bq->lock); bq->state = state; mutex_unlock(&bq->lock); if (!bq->iilimit_autoset_enable) { dev_dbg(bq->dev, "manually setting iilimit = %u\n", bq->init_data.iilimit); /* program fixed input current limit */ ret = bq24257_field_write(bq, F_IILIMIT, bq->init_data.iilimit); if (ret < 0) return ret; } else if (!state.power_good) /* activate D+/D- detection algorithm */ ret = bq24257_field_write(bq, F_DPDM_EN, 1); else if (state.fault != FAULT_NO_BAT) ret = bq24257_iilimit_autoset(bq); return ret; }

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static enum power_supply_property bq24257_power_supply_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, }; static char *bq24257_charger_supplied_to[] = { "main-battery", }; static const struct power_supply_desc bq24257_power_supply_desc = { .name = "bq24257-charger", .type = POWER_SUPPLY_TYPE_USB, .properties = bq24257_power_supply_props, .num_properties = ARRAY_SIZE(bq24257_power_supply_props), .get_property = bq24257_power_supply_get_property, .set_property = bq24257_power_supply_set_property, .property_is_writeable = bq24257_power_supply_property_is_writeable, };
static ssize_t bq24257_show_ovp_voltage(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq24257_device *bq = power_supply_get_drvdata(psy); return scnprintf(buf, PAGE_SIZE, "%u\n", bq24257_vovp_map[bq->init_data.vovp]); }

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Andreas Dannenberg59100.00%1100.00%
Total59100.00%1100.00%


static ssize_t bq24257_show_in_dpm_voltage(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq24257_device *bq = power_supply_get_drvdata(psy); return scnprintf(buf, PAGE_SIZE, "%u\n", bq24257_vindpm_map[bq->init_data.vindpm]); }

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Andreas Dannenberg59100.00%1100.00%
Total59100.00%1100.00%


static ssize_t bq24257_sysfs_show_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct power_supply *psy = dev_get_drvdata(dev); struct bq24257_device *bq = power_supply_get_drvdata(psy); int ret; if (strcmp(attr->attr.name, "high_impedance_enable") == 0) ret = bq24257_field_read(bq, F_HZ_MODE); else if (strcmp(attr->attr.name, "sysoff_enable") == 0) ret = bq24257_field_read(bq, F_SYSOFF); else return -EINVAL; if (ret < 0) return ret; return scnprintf(buf, PAGE_SIZE, "%d\n", ret); }

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Andreas Dannenberg118100.00%1100.00%
Total118100.00%1100.00%


static ssize_t bq24257_sysfs_set_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct power_supply *psy = dev_get_drvdata(dev); struct bq24257_device *bq = power_supply_get_drvdata(psy); long val; int ret; if (kstrtol(buf, 10, &val) < 0) return -EINVAL; if (strcmp(attr->attr.name, "high_impedance_enable") == 0) ret = bq24257_field_write(bq, F_HZ_MODE, (bool)val); else if (strcmp(attr->attr.name, "sysoff_enable") == 0) ret = bq24257_field_write(bq, F_SYSOFF, (bool)val); else return -EINVAL; if (ret < 0) return ret; return count; }

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Andreas Dannenberg144100.00%1100.00%
Total144100.00%1100.00%

static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL); static DEVICE_ATTR(in_dpm_voltage, S_IRUGO, bq24257_show_in_dpm_voltage, NULL); static DEVICE_ATTR(high_impedance_enable, S_IWUSR | S_IRUGO, bq24257_sysfs_show_enable, bq24257_sysfs_set_enable); static DEVICE_ATTR(sysoff_enable, S_IWUSR | S_IRUGO, bq24257_sysfs_show_enable, bq24257_sysfs_set_enable); static struct attribute *bq24257_charger_attr[] = { &dev_attr_ovp_voltage.attr, &dev_attr_in_dpm_voltage.attr, &dev_attr_high_impedance_enable.attr, &dev_attr_sysoff_enable.attr, NULL, }; static const struct attribute_group bq24257_attr_group = { .attrs = bq24257_charger_attr, };
static int bq24257_power_supply_init(struct bq24257_device *bq) { struct power_supply_config psy_cfg = { .drv_data = bq, }; psy_cfg.supplied_to = bq24257_charger_supplied_to; psy_cfg.num_supplicants = ARRAY_SIZE(bq24257_charger_supplied_to); bq->charger = devm_power_supply_register(bq->dev, &bq24257_power_supply_desc, &psy_cfg); return PTR_ERR_OR_ZERO(bq->charger); }

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Laurentiu Palcu6096.77%133.33%
Andreas Dannenberg23.23%266.67%
Total62100.00%3100.00%


static void bq24257_pg_gpio_probe(struct bq24257_device *bq) { bq->pg = devm_gpiod_get_optional(bq->dev, BQ24257_PG_GPIO, GPIOD_IN); if (PTR_ERR(bq->pg) == -EPROBE_DEFER) { dev_info(bq->dev, "probe retry requested for PG pin\n"); return; } else if (IS_ERR(bq->pg)) { dev_err(bq->dev, "error probing PG pin\n"); bq->pg = NULL; return; } if (bq->pg) dev_dbg(bq->dev, "probed PG pin = %d\n", desc_to_gpio(bq->pg)); }

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Andreas Dannenberg5353.00%133.33%
Laurentiu Palcu4646.00%133.33%
Uwe Kleine-König11.00%133.33%
Total100100.00%3100.00%


static int bq24257_fw_probe(struct bq24257_device *bq) { int ret; u32 property; /* Required properties */ ret = device_property_read_u32(bq->dev, "ti,charge-current", &property); if (ret < 0) return ret; bq->init_data.ichg = bq24257_find_idx(property, bq24257_ichg_map, BQ24257_ICHG_MAP_SIZE); ret = device_property_read_u32(bq->dev, "ti,battery-regulation-voltage", &property); if (ret < 0) return ret; bq->init_data.vbat = bq24257_find_idx(property, bq24257_vbat_map, BQ24257_VBAT_MAP_SIZE); ret = device_property_read_u32(bq->dev, "ti,termination-current", &property); if (ret < 0) return ret; bq->init_data.iterm = bq24257_find_idx(property, bq24257_iterm_map, BQ24257_ITERM_MAP_SIZE); /* Optional properties. If not provided use reasonable default. */ ret = device_property_read_u32(bq->dev, "ti,current-limit", &property); if (ret < 0) { bq->iilimit_autoset_enable = true; /* * Explicitly set a default value which will be needed for * devices that don't support the automatic setting of the input * current limit through the charger type detection mechanism. */ bq->init_data.iilimit = IILIMIT_500; } else bq->init_data.iilimit = bq24257_find_idx(property, bq24257_iilimit_map, BQ24257_IILIMIT_MAP_SIZE); ret = device_property_read_u32(bq->dev, "ti,ovp-voltage", &property); if (ret < 0) bq->init_data.vovp = VOVP_6500; else bq->init_data.vovp = bq24257_find_idx(property, bq24257_vovp_map, BQ24257_VOVP_MAP_SIZE); ret = device_property_read_u32(bq->dev, "ti,in-dpm-voltage", &property); if (ret < 0) bq->init_data.vindpm = VINDPM_4360; else bq->init_data.vindpm = bq24257_find_idx(property, bq24257_vindpm_map, BQ24257_VINDPM_MAP_SIZE); return 0; }

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Andreas Dannenberg14351.62%375.00%
Laurentiu Palcu13448.38%125.00%
Total277100.00%4100.00%


static int bq24257_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; const struct acpi_device_id *acpi_id; struct bq24257_device *bq; int ret; int i; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(dev, "No support for SMBUS_BYTE_DATA\n"); return -ENODEV; } bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL); if (!bq) return -ENOMEM; bq->client = client; bq->dev = dev; if (ACPI_HANDLE(dev)) { acpi_id = acpi_match_device(dev->driver->acpi_match_table, &client->dev); if (!acpi_id) { dev_err(dev, "Failed to match ACPI device\n"); return -ENODEV; } bq->chip = (enum bq2425x_chip)acpi_id->driver_data; } else { bq->chip = (enum bq2425x_chip)id->driver_data; } mutex_init(&bq->lock); bq->rmap = devm_regmap_init_i2c(client, &bq24257_regmap_config); if (IS_ERR(bq->rmap)) { dev_err(dev, "failed to allocate register map\n"); return PTR_ERR(bq->rmap); } for (i = 0; i < ARRAY_SIZE(bq24257_reg_fields); i++) { const struct reg_field *reg_fields = bq24257_reg_fields; bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap, reg_fields[i]); if (IS_ERR(bq->rmap_fields[i])) { dev_err(dev, "cannot allocate regmap field\n"); return PTR_ERR(bq->rmap_fields[i]); } } i2c_set_clientdata(client, bq); if (!dev->platform_data) { ret = bq24257_fw_probe(bq); if (ret < 0) { dev_err(dev, "Cannot read device properties.\n"); return ret; } } else { return -ENODEV; } /* * The BQ24250 doesn't support the D+/D- based charger type detection * used for the automatic setting of the input current limit setting so * explicitly disable that feature. */ if (bq->chip == BQ24250) bq->iilimit_autoset_enable = false; if (bq->iilimit_autoset_enable) INIT_DELAYED_WORK(&bq->iilimit_setup_work, bq24257_iilimit_setup_work); /* * The BQ24250 doesn't have a dedicated Power Good (PG) pin so let's * not probe for it and instead use a SW-based approach to determine * the PG state. We also use a SW-based approach for all other devices * if the PG pin is either not defined or can't be probed. */ if (bq->chip != BQ24250) bq24257_pg_gpio_probe(bq); if (PTR_ERR(bq->pg) == -EPROBE_DEFER) return PTR_ERR(bq->pg); else if (!bq->pg) dev_info(bq->dev, "using SW-based power-good detection\n"); /* reset all registers to defaults */ ret = bq24257_field_write(bq, F_RESET, 1); if (ret < 0) return ret; /* * Put the RESET bit back to 0, in cache. For some reason the HW always * returns 1 on this bit, so this is the only way to avoid resetting the * chip every time we update another field in this register. */ ret = bq24257_field_write(bq, F_RESET, 0); if (ret < 0) return ret; ret = bq24257_hw_init(bq); if (ret < 0) { dev_err(dev, "Cannot initialize the chip.\n"); return ret; } ret = bq24257_power_supply_init(bq); if (ret < 0) { dev_err(dev, "Failed to register power supply\n"); return ret; } ret = devm_request_threaded_irq(dev, client->irq, NULL, bq24257_irq_handler_thread, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, bq2425x_chip_name[bq->chip], bq); if (ret) { dev_err(dev, "Failed to request IRQ #%d\n", client->irq); return ret; } ret = sysfs_create_group(&bq->charger->dev.kobj, &bq24257_attr_group); if (ret < 0) { dev_err(dev, "Can't create sysfs entries\n"); return ret; } return 0; }

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PersonTokensPropCommitsCommitProp
Laurentiu Palcu39363.18%114.29%
Andreas Dannenberg20432.80%571.43%
Georges Savoundararadj254.02%114.29%
Total622100.00%7100.00%


static int bq24257_remove(struct i2c_client *client) { struct bq24257_device *bq = i2c_get_clientdata(client); if (bq->iilimit_autoset_enable) cancel_delayed_work_sync(&bq->iilimit_setup_work); sysfs_remove_group(&bq->charger->dev.kobj, &bq24257_attr_group); bq24257_field_write(bq, F_RESET, 1); /* reset to defaults */ return 0; }

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Laurentiu Palcu4266.67%133.33%
Andreas Dannenberg2133.33%266.67%
Total63100.00%3100.00%

#ifdef CONFIG_PM_SLEEP
static int bq24257_suspend(struct device *dev) { struct bq24257_device *bq = dev_get_drvdata(dev); int ret = 0; if (bq->iilimit_autoset_enable) cancel_delayed_work_sync(&bq->iilimit_setup_work); /* reset all registers to default (and activate standalone mode) */ ret = bq24257_field_write(bq, F_RESET, 1); if (ret < 0) dev_err(bq->dev, "Cannot reset chip to standalone mode.\n"); return ret; }

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Laurentiu Palcu6491.43%150.00%
Andreas Dannenberg68.57%150.00%
Total70100.00%2100.00%


static int bq24257_resume(struct device *dev) { int ret; struct bq24257_device *bq = dev_get_drvdata(dev); ret = regcache_drop_region(bq->rmap, BQ24257_REG_1, BQ24257_REG_7); if (ret < 0) return ret; ret = bq24257_field_write(bq, F_RESET, 0); if (ret < 0) return ret; ret = bq24257_hw_init(bq); if (ret < 0) { dev_err(bq->dev, "Cannot init chip after resume.\n"); return ret; } /* signal userspace, maybe state changed while suspended */ power_supply_changed(bq->charger); return 0; }

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Laurentiu Palcu104100.00%1100.00%
Total104100.00%1100.00%

#endif static const struct dev_pm_ops bq24257_pm = { SET_SYSTEM_SLEEP_PM_OPS(bq24257_suspend, bq24257_resume) }; static const struct i2c_device_id bq24257_i2c_ids[] = { { "bq24250", BQ24250 }, { "bq24251", BQ24251 }, { "bq24257", BQ24257 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq24257_i2c_ids); static const struct of_device_id bq24257_of_match[] = { { .compatible = "ti,bq24250", }, { .compatible = "ti,bq24251", }, { .compatible = "ti,bq24257", }, { }, }; MODULE_DEVICE_TABLE(of, bq24257_of_match); static const struct acpi_device_id bq24257_acpi_match[] = { { "BQ242500", BQ24250 }, { "BQ242510", BQ24251 }, { "BQ242570", BQ24257 }, {}, }; MODULE_DEVICE_TABLE(acpi, bq24257_acpi_match); static struct i2c_driver bq24257_driver = { .driver = { .name = "bq24257-charger", .of_match_table = of_match_ptr(bq24257_of_match), .acpi_match_table = ACPI_PTR(bq24257_acpi_match), .pm = &bq24257_pm, }, .probe = bq24257_probe, .remove = bq24257_remove, .id_table = bq24257_i2c_ids, }; module_i2c_driver(bq24257_driver); MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>"); MODULE_DESCRIPTION("bq24257 charger driver"); MODULE_LICENSE("GPL");

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Laurentiu Palcu338568.33%16.67%
Andreas Dannenberg154331.15%1280.00%
Georges Savoundararadj250.50%16.67%
Uwe Kleine-König10.02%16.67%
Total4954100.00%15100.00%
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