diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/bq27xxx_battery.c | 622 |
1 files changed, 412 insertions, 210 deletions
diff --git a/drivers/power/bq27xxx_battery.c b/drivers/power/bq27xxx_battery.c index 1ff88ade97fd..236c5888aa9d 100644 --- a/drivers/power/bq27xxx_battery.c +++ b/drivers/power/bq27xxx_battery.c @@ -17,11 +17,24 @@ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Datasheets: - * http://focus.ti.com/docs/prod/folders/print/bq27000.html - * http://focus.ti.com/docs/prod/folders/print/bq27500.html + * http://www.ti.com/product/bq27000 + * http://www.ti.com/product/bq27200 + * http://www.ti.com/product/bq27010 + * http://www.ti.com/product/bq27210 + * http://www.ti.com/product/bq27500 + * http://www.ti.com/product/bq27510-g3 + * http://www.ti.com/product/bq27520-g4 + * http://www.ti.com/product/bq27530-g1 + * http://www.ti.com/product/bq27531-g1 + * http://www.ti.com/product/bq27541-g1 + * http://www.ti.com/product/bq27542-g1 + * http://www.ti.com/product/bq27546-g1 + * http://www.ti.com/product/bq27742-g1 + * http://www.ti.com/product/bq27545-g1 + * http://www.ti.com/product/bq27421-g1 * http://www.ti.com/product/bq27425-g1 - * http://www.ti.com/product/BQ27742-G1 - * http://www.ti.com/product/BQ27510-G3 + * http://www.ti.com/product/bq27411-g1 + * http://www.ti.com/product/bq27621-g1 */ #include <linux/device.h> @@ -43,54 +56,57 @@ #define BQ27XXX_MANUFACTURER "Texas Instruments" -#define BQ27x00_REG_TEMP 0x06 -#define BQ27x00_REG_VOLT 0x08 -#define BQ27x00_REG_AI 0x14 -#define BQ27x00_REG_FLAGS 0x0A -#define BQ27x00_REG_TTE 0x16 -#define BQ27x00_REG_TTF 0x18 -#define BQ27x00_REG_TTECP 0x26 -#define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */ -#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */ -#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */ -#define BQ27x00_REG_AE 0x22 /* Available energy */ -#define BQ27x00_POWER_AVG 0x24 - -#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */ -#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */ +/* BQ27XXX Flags */ +#define BQ27XXX_FLAG_DSC BIT(0) +#define BQ27XXX_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ +#define BQ27XXX_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ +#define BQ27XXX_FLAG_FC BIT(9) +#define BQ27XXX_FLAG_OTD BIT(14) +#define BQ27XXX_FLAG_OTC BIT(15) + +/* BQ27000 has different layout for Flags register */ #define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */ #define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */ #define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */ #define BQ27000_FLAG_FC BIT(5) #define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */ -#define BQ27500_REG_SOC 0x2C -#define BQ27500_REG_DCAP 0x3C /* Design capacity */ -#define BQ27500_FLAG_DSC BIT(0) -#define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */ -#define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */ -#define BQ27500_FLAG_FC BIT(9) -#define BQ27500_FLAG_OTC BIT(15) - -#define BQ27742_POWER_AVG 0x76 - -#define BQ27510_REG_SOC 0x20 -#define BQ27510_REG_DCAP 0x2E /* Design capacity */ -#define BQ27510_REG_CYCT 0x1E /* Cycle count total */ - -/* bq27425 register addresses are same as bq27x00 addresses minus 4 */ -#define BQ27425_REG_OFFSET 0x04 -#define BQ27425_REG_SOC (0x1C + BQ27425_REG_OFFSET) -#define BQ27425_REG_DCAP (0x3C + BQ27425_REG_OFFSET) - -#define BQ27XXX_RS 20 /* Resistor sense */ -#define BQ27XXX_POWER_CONSTANT (256 * 29200 / 1000) +#define BQ27XXX_RS (20) /* Resistor sense mOhm */ +#define BQ27XXX_POWER_CONSTANT (29200) /* 29.2 µV^2 * 1000 */ +#define BQ27XXX_CURRENT_CONSTANT (3570) /* 3.57 µV * 1000 */ struct bq27xxx_device_info; struct bq27xxx_access_methods { int (*read)(struct bq27xxx_device_info *di, u8 reg, bool single); }; +#define INVALID_REG_ADDR 0xff + +/* + * bq27xxx_reg_index - Register names + * + * These are indexes into a device's register mapping array. + */ +enum bq27xxx_reg_index { + BQ27XXX_REG_CTRL = 0, /* Control */ + BQ27XXX_REG_TEMP, /* Temperature */ + BQ27XXX_REG_INT_TEMP, /* Internal Temperature */ + BQ27XXX_REG_VOLT, /* Voltage */ + BQ27XXX_REG_AI, /* Average Current */ + BQ27XXX_REG_FLAGS, /* Flags */ + BQ27XXX_REG_TTE, /* Time-to-Empty */ + BQ27XXX_REG_TTF, /* Time-to-Full */ + BQ27XXX_REG_TTES, /* Time-to-Empty Standby */ + BQ27XXX_REG_TTECP, /* Time-to-Empty at Constant Power */ + BQ27XXX_REG_NAC, /* Nominal Available Capacity */ + BQ27XXX_REG_FCC, /* Full Charge Capacity */ + BQ27XXX_REG_CYCT, /* Cycle Count */ + BQ27XXX_REG_AE, /* Available Energy */ + BQ27XXX_REG_SOC, /* State-of-Charge */ + BQ27XXX_REG_DCAP, /* Design Capacity */ + BQ27XXX_REG_AP, /* Average Power */ +}; + struct bq27xxx_reg_cache { int temperature; int time_to_empty; @@ -121,9 +137,162 @@ struct bq27xxx_device_info { struct bq27xxx_access_methods bus; struct mutex lock; + + u8 *regs; +}; + +/* Register mappings */ +static u8 bq27000_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + INVALID_REG_ADDR, /* INT TEMP - NA*/ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + 0x18, /* TTF */ + 0x1c, /* TTES */ + 0x26, /* TTECP */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x2a, /* CYCT */ + 0x22, /* AE */ + 0x0b, /* SOC(RSOC) */ + 0x76, /* DCAP(ILMD) */ + 0x24, /* AP */ +}; + +static u8 bq27010_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + INVALID_REG_ADDR, /* INT TEMP - NA*/ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + 0x18, /* TTF */ + 0x1c, /* TTES */ + 0x26, /* TTECP */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x2a, /* CYCT */ + INVALID_REG_ADDR, /* AE - NA */ + 0x0b, /* SOC(RSOC) */ + 0x76, /* DCAP(ILMD) */ + INVALID_REG_ADDR, /* AP - NA */ +}; + +static u8 bq27500_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + 0x28, /* INT TEMP */ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + INVALID_REG_ADDR, /* TTF - NA */ + 0x1a, /* TTES */ + INVALID_REG_ADDR, /* TTECP - NA */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x1e, /* CYCT */ + INVALID_REG_ADDR, /* AE - NA */ + 0x20, /* SOC(RSOC) */ + 0x2e, /* DCAP(ILMD) */ + INVALID_REG_ADDR, /* AP - NA */ }; -static enum power_supply_property bq27x00_battery_props[] = { +static u8 bq27530_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + 0x32, /* INT TEMP */ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + INVALID_REG_ADDR, /* TTF - NA */ + INVALID_REG_ADDR, /* TTES - NA */ + INVALID_REG_ADDR, /* TTECP - NA */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x2a, /* CYCT */ + INVALID_REG_ADDR, /* AE - NA */ + 0x2c, /* SOC(RSOC) */ + INVALID_REG_ADDR, /* DCAP - NA */ + 0x24, /* AP */ +}; + +static u8 bq27541_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + 0x28, /* INT TEMP */ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + INVALID_REG_ADDR, /* TTF - NA */ + INVALID_REG_ADDR, /* TTES - NA */ + INVALID_REG_ADDR, /* TTECP - NA */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x2a, /* CYCT */ + INVALID_REG_ADDR, /* AE - NA */ + 0x2c, /* SOC(RSOC) */ + 0x3c, /* DCAP */ + 0x76, /* AP */ +}; + +static u8 bq27545_regs[] = { + 0x00, /* CONTROL */ + 0x06, /* TEMP */ + 0x28, /* INT TEMP */ + 0x08, /* VOLT */ + 0x14, /* AVG CURR */ + 0x0a, /* FLAGS */ + 0x16, /* TTE */ + INVALID_REG_ADDR, /* TTF - NA */ + INVALID_REG_ADDR, /* TTES - NA */ + INVALID_REG_ADDR, /* TTECP - NA */ + 0x0c, /* NAC */ + 0x12, /* LMD(FCC) */ + 0x2a, /* CYCT */ + INVALID_REG_ADDR, /* AE - NA */ + 0x2c, /* SOC(RSOC) */ + INVALID_REG_ADDR, /* DCAP - NA */ + 0x24, /* AP */ +}; + +static u8 bq27421_regs[] = { + 0x00, /* CONTROL */ + 0x02, /* TEMP */ + 0x1e, /* INT TEMP */ + 0x04, /* VOLT */ + 0x10, /* AVG CURR */ + 0x06, /* FLAGS */ + INVALID_REG_ADDR, /* TTE - NA */ + INVALID_REG_ADDR, /* TTF - NA */ + INVALID_REG_ADDR, /* TTES - NA */ + INVALID_REG_ADDR, /* TTECP - NA */ + 0x08, /* NAC */ + 0x0e, /* FCC */ + INVALID_REG_ADDR, /* CYCT - NA */ + INVALID_REG_ADDR, /* AE - NA */ + 0x1c, /* SOC */ + 0x3c, /* DCAP */ + 0x18, /* AP */ +}; + +static u8 *bq27xxx_regs[] = { + [BQ27000] = bq27000_regs, + [BQ27010] = bq27010_regs, + [BQ27500] = bq27500_regs, + [BQ27530] = bq27530_regs, + [BQ27541] = bq27541_regs, + [BQ27545] = bq27545_regs, + [BQ27421] = bq27421_regs, +}; + +static enum power_supply_property bq27000_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, @@ -145,7 +314,7 @@ static enum power_supply_property bq27x00_battery_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, }; -static enum power_supply_property bq27425_battery_props[] = { +static enum power_supply_property bq27010_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, @@ -153,14 +322,19 @@ static enum power_supply_property bq27425_battery_props[] = { POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, + POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_CHARGE_FULL, POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_MANUFACTURER, }; -static enum power_supply_property bq27742_battery_props[] = { +static enum power_supply_property bq27500_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, @@ -174,12 +348,29 @@ static enum power_supply_property bq27742_battery_props[] = { POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static enum power_supply_property bq27530_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CAPACITY_LEVEL, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_POWER_AVG, POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_CYCLE_COUNT, POWER_SUPPLY_PROP_MANUFACTURER, }; -static enum power_supply_property bq27510_battery_props[] = { +static enum power_supply_property bq27541_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, @@ -198,6 +389,58 @@ static enum power_supply_property bq27510_battery_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, }; +static enum power_supply_property bq27545_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CAPACITY_LEVEL, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_POWER_AVG, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static enum power_supply_property bq27421_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CAPACITY_LEVEL, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +#define BQ27XXX_PROP(_id, _prop) \ + [_id] = { \ + .props = _prop, \ + .size = ARRAY_SIZE(_prop), \ + } + +static struct { + enum power_supply_property *props; + size_t size; +} bq27xxx_battery_props[] = { + BQ27XXX_PROP(BQ27000, bq27000_battery_props), + BQ27XXX_PROP(BQ27010, bq27010_battery_props), + BQ27XXX_PROP(BQ27500, bq27500_battery_props), + BQ27XXX_PROP(BQ27530, bq27530_battery_props), + BQ27XXX_PROP(BQ27541, bq27541_battery_props), + BQ27XXX_PROP(BQ27545, bq27545_battery_props), + BQ27XXX_PROP(BQ27421, bq27421_battery_props), +}; + static unsigned int poll_interval = 360; module_param(poll_interval, uint, 0644); MODULE_PARM_DESC(poll_interval, @@ -207,25 +450,14 @@ MODULE_PARM_DESC(poll_interval, * Common code for BQ27xxx devices */ -static inline int bq27xxx_read(struct bq27xxx_device_info *di, u8 reg, +static inline int bq27xxx_read(struct bq27xxx_device_info *di, int reg_index, bool single) { - if (di->chip == BQ27425) - return di->bus.read(di, reg - BQ27425_REG_OFFSET, single); - return di->bus.read(di, reg, single); -} + /* Reports EINVAL for invalid/missing registers */ + if (!di || di->regs[reg_index] == INVALID_REG_ADDR) + return -EINVAL; -/* - * Higher versions of the chip like BQ27425 and BQ27500 - * differ from BQ27000 and BQ27200 in calculation of certain - * parameters. Hence we need to check for the chip type. - */ -static bool bq27xxx_is_chip_version_higher(struct bq27xxx_device_info *di) -{ - if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742 - || di->chip == BQ27510) - return true; - return false; + return di->bus.read(di, di->regs[reg_index], single); } /* @@ -236,14 +468,7 @@ static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di) { int soc; - if (di->chip == BQ27500 || di->chip == BQ27742) - soc = bq27xxx_read(di, BQ27500_REG_SOC, false); - else if (di->chip == BQ27510) - soc = bq27xxx_read(di, BQ27510_REG_SOC, false); - else if (di->chip == BQ27425) - soc = bq27xxx_read(di, BQ27425_REG_SOC, false); - else /* for the bq27000 we read the "relative" SoC register */ - soc = bq27xxx_read(di, BQ27000_REG_RSOC, true); + soc = bq27xxx_read(di, BQ27XXX_REG_SOC, false); if (soc < 0) dev_dbg(di->dev, "error reading State-of-Charge\n"); @@ -266,10 +491,10 @@ static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) return charge; } - if (bq27xxx_is_chip_version_higher(di)) - charge *= 1000; + if (di->chip == BQ27000 || di->chip == BQ27010) + charge *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; else - charge = charge * 3570 / BQ27XXX_RS; + charge *= 1000; return charge; } @@ -281,57 +506,46 @@ static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg) static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di) { int flags; - bool is_bq27500 = di->chip == BQ27500; - bool is_bq27742 = di->chip == BQ27742; - bool is_higher = bq27xxx_is_chip_version_higher(di); - bool flags_1b = !(is_bq27500 || is_bq27742); - flags = bq27xxx_read(di, BQ27x00_REG_FLAGS, flags_1b); - if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI)) - return -ENODATA; + if (di->chip == BQ27000 || di->chip == BQ27010) { + flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true); + if (flags >= 0 && (flags & BQ27000_FLAG_CI)) + return -ENODATA; + } - return bq27xxx_battery_read_charge(di, BQ27x00_REG_NAC); + return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC); } /* - * Return the battery Last measured discharge in µAh + * Return the battery Full Charge Capacity in µAh * Or < 0 if something fails. */ -static inline int bq27xxx_battery_read_lmd(struct bq27xxx_device_info *di) +static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di) { - return bq27xxx_battery_read_charge(di, BQ27x00_REG_LMD); + return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC); } /* - * Return the battery Initial last measured discharge in µAh + * Return the Design Capacity in µAh * Or < 0 if something fails. */ -static int bq27xxx_battery_read_ilmd(struct bq27xxx_device_info *di) +static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di) { - int ilmd; + int dcap; - if (bq27xxx_is_chip_version_higher(di)) { - if (di->chip == BQ27425) - ilmd = bq27xxx_read(di, BQ27425_REG_DCAP, false); - else if (di->chip == BQ27510) - ilmd = bq27xxx_read(di, BQ27510_REG_DCAP, false); - else - ilmd = bq27xxx_read(di, BQ27500_REG_DCAP, false); - } else { - ilmd = bq27xxx_read(di, BQ27000_REG_ILMD, true); - } + dcap = bq27xxx_read(di, BQ27XXX_REG_DCAP, false); - if (ilmd < 0) { + if (dcap < 0) { dev_dbg(di->dev, "error reading initial last measured discharge\n"); - return ilmd; + return dcap; } - if (bq27xxx_is_chip_version_higher(di)) - ilmd *= 1000; + if (di->chip == BQ27000 || di->chip == BQ27010) + dcap *= BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; else - ilmd = ilmd * 256 * 3570 / BQ27XXX_RS; + dcap *= 1000; - return ilmd; + return dcap; } /* @@ -342,16 +556,16 @@ static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di) { int ae; - ae = bq27xxx_read(di, BQ27x00_REG_AE, false); + ae = bq27xxx_read(di, BQ27XXX_REG_AE, false); if (ae < 0) { dev_dbg(di->dev, "error reading available energy\n"); return ae; } - if (di->chip == BQ27500) - ae *= 1000; + if (di->chip == BQ27000 || di->chip == BQ27010) + ae *= BQ27XXX_POWER_CONSTANT / BQ27XXX_RS; else - ae = ae * 29200 / BQ27XXX_RS; + ae *= 1000; return ae; } @@ -364,13 +578,13 @@ static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di) { int temp; - temp = bq27xxx_read(di, BQ27x00_REG_TEMP, false); + temp = bq27xxx_read(di, BQ27XXX_REG_TEMP, false); if (temp < 0) { dev_err(di->dev, "error reading temperature\n"); return temp; } - if (!bq27xxx_is_chip_version_higher(di)) + if (di->chip == BQ27000 || di->chip == BQ27010) temp = 5 * temp / 2; return temp; @@ -384,10 +598,7 @@ static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di) { int cyct; - if (di->chip == BQ27510) - cyct = bq27xxx_read(di, BQ27510_REG_CYCT, false); - else - cyct = bq27xxx_read(di, BQ27x00_REG_CYCT, false); + cyct = bq27xxx_read(di, BQ27XXX_REG_CYCT, false); if (cyct < 0) dev_err(di->dev, "error reading cycle count total\n"); @@ -419,21 +630,32 @@ static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg) * Read an average power register. * Return < 0 if something fails. */ -static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di, u8 reg) +static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di) { int tval; - tval = bq27xxx_read(di, reg, false); + tval = bq27xxx_read(di, BQ27XXX_REG_AP, false); if (tval < 0) { - dev_err(di->dev, "error reading power avg rgister %02x: %d\n", - reg, tval); + dev_err(di->dev, "error reading average power register %02x: %d\n", + BQ27XXX_REG_AP, tval); return tval; } - if (di->chip == BQ27500) + if (di->chip == BQ27000 || di->chip == BQ27010) + return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; + else return tval; +} + +/* + * Returns true if a battery over temperature condition is detected + */ +static int bq27xxx_battery_overtemp(struct bq27xxx_device_info *di, u16 flags) +{ + if (di->chip == BQ27500 || di->chip == BQ27541) + return flags & (BQ27XXX_FLAG_OTC | BQ27XXX_FLAG_OTD); else - return (tval * BQ27XXX_POWER_CONSTANT) / BQ27XXX_RS; + return flags & BQ27XXX_FLAG_OTC; } /* @@ -442,53 +664,43 @@ static int bq27xxx_battery_read_pwr_avg(struct bq27xxx_device_info *di, u8 reg) */ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di) { - int tval; + u16 tval; - tval = bq27xxx_read(di, BQ27x00_REG_FLAGS, false); + tval = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); if (tval < 0) { dev_err(di->dev, "error reading flag register:%d\n", tval); return tval; } - if (di->chip == BQ27500) { - if (tval & BQ27500_FLAG_SOCF) + if (di->chip == BQ27000 || di->chip == BQ27010) { + if (tval & BQ27000_FLAG_EDV1) tval = POWER_SUPPLY_HEALTH_DEAD; - else if (tval & BQ27500_FLAG_OTC) - tval = POWER_SUPPLY_HEALTH_OVERHEAT; else tval = POWER_SUPPLY_HEALTH_GOOD; - return tval; - } else if (di->chip == BQ27510) { - if (tval & BQ27500_FLAG_OTC) - return POWER_SUPPLY_HEALTH_OVERHEAT; - return POWER_SUPPLY_HEALTH_GOOD; } else { - if (tval & BQ27000_FLAG_EDV1) + if (tval & BQ27XXX_FLAG_SOCF) tval = POWER_SUPPLY_HEALTH_DEAD; + else if (bq27xxx_battery_overtemp(di, tval)) + tval = POWER_SUPPLY_HEALTH_OVERHEAT; else tval = POWER_SUPPLY_HEALTH_GOOD; - return tval; } - return -1; + return tval; } static void bq27xxx_battery_update(struct bq27xxx_device_info *di) { struct bq27xxx_reg_cache cache = {0, }; - bool is_bq27500 = di->chip == BQ27500; - bool is_bq27510 = di->chip == BQ27510; - bool is_bq27425 = di->chip == BQ27425; - bool is_bq27742 = di->chip == BQ27742; - bool flags_1b = !(is_bq27500 || is_bq27742); + bool has_ci_flag = di->chip == BQ27000 || di->chip == BQ27010; + bool has_singe_flag = di->chip == BQ27000 || di->chip == BQ27010; - cache.flags = bq27xxx_read(di, BQ27x00_REG_FLAGS, flags_1b); + cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag); if ((cache.flags & 0xff) == 0xff) - /* read error */ - cache.flags = -1; + cache.flags = -1; /* read error */ if (cache.flags >= 0) { - if (!is_bq27500 && !is_bq27425 && !is_bq27742 && !is_bq27510 - && (cache.flags & BQ27000_FLAG_CI)) { + cache.temperature = bq27xxx_battery_read_temperature(di); + if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) { dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n"); cache.capacity = -ENODATA; cache.energy = -ENODATA; @@ -498,41 +710,26 @@ static void bq27xxx_battery_update(struct bq27xxx_device_info *di) cache.charge_full = -ENODATA; cache.health = -ENODATA; } else { + if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR) + cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE); + if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR) + cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP); + if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR) + cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF); + cache.charge_full = bq27xxx_battery_read_fcc(di); cache.capacity = bq27xxx_battery_read_soc(di); - if (is_bq27742 || is_bq27510) - cache.time_to_empty = - bq27xxx_battery_read_time(di, - BQ27x00_REG_TTE); - else if (!is_bq27425) { + if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR) cache.energy = bq27xxx_battery_read_energy(di); - cache.time_to_empty = - bq27xxx_battery_read_time(di, - BQ27x00_REG_TTE); - cache.time_to_empty_avg = - bq27xxx_battery_read_time(di, - BQ27x00_REG_TTECP); - cache.time_to_full = - bq27xxx_battery_read_time(di, - BQ27x00_REG_TTF); - } - cache.charge_full = bq27xxx_battery_read_lmd(di); cache.health = bq27xxx_battery_read_health(di); } - cache.temperature = bq27xxx_battery_read_temperature(di); - if (!is_bq27425) + if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR) cache.cycle_count = bq27xxx_battery_read_cyct(di); - if (is_bq27742) - cache.power_avg = - bq27xxx_battery_read_pwr_avg(di, - BQ27742_POWER_AVG); - else - cache.power_avg = - bq27xxx_battery_read_pwr_avg(di, - BQ27x00_POWER_AVG); + if (di->regs[BQ27XXX_REG_AP] != INVALID_REG_ADDR) + cache.power_avg = bq27xxx_battery_read_pwr_avg(di); /* We only have to read charge design full once */ if (di->charge_design_full <= 0) - di->charge_design_full = bq27xxx_battery_read_ilmd(di); + di->charge_design_full = bq27xxx_battery_read_dcap(di); } if (di->cache.capacity != cache.capacity) @@ -547,7 +744,8 @@ static void bq27xxx_battery_update(struct bq27xxx_device_info *di) static void bq27xxx_battery_poll(struct work_struct *work) { struct bq27xxx_device_info *di = - container_of(work, struct bq27xxx_device_info, work.work); + container_of(work, struct bq27xxx_device_info, + work.work); bq27xxx_battery_update(di); @@ -569,23 +767,23 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di, int curr; int flags; - curr = bq27xxx_read(di, BQ27x00_REG_AI, false); + curr = bq27xxx_read(di, BQ27XXX_REG_AI, false); if (curr < 0) { dev_err(di->dev, "error reading current\n"); return curr; } - if (bq27xxx_is_chip_version_higher(di)) { - /* bq27500 returns signed value */ - val->intval = (int)((s16)curr) * 1000; - } else { - flags = bq27xxx_read(di, BQ27x00_REG_FLAGS, false); + if (di->chip == BQ27000 || di->chip == BQ27010) { + flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, false); if (flags & BQ27000_FLAG_CHGS) { dev_dbg(di->dev, "negative current!\n"); curr = -curr; } - val->intval = curr * 3570 / BQ27XXX_RS; + val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS; + } else { + /* Other gauges return signed value */ + val->intval = (int)((s16)curr) * 1000; } return 0; @@ -596,14 +794,7 @@ static int bq27xxx_battery_status(struct bq27xxx_device_info *di, { int status; - if (bq27xxx_is_chip_version_higher(di)) { - if (di->cache.flags & BQ27500_FLAG_FC) - status = POWER_SUPPLY_STATUS_FULL; - else if (di->cache.flags & BQ27500_FLAG_DSC) - status = POWER_SUPPLY_STATUS_DISCHARGING; - else - status = POWER_SUPPLY_STATUS_CHARGING; - } else { + if (di->chip == BQ27000 || di->chip == BQ27010) { if (di->cache.flags & BQ27000_FLAG_FC) status = POWER_SUPPLY_STATUS_FULL; else if (di->cache.flags & BQ27000_FLAG_CHGS) @@ -612,6 +803,13 @@ static int bq27xxx_battery_status(struct bq27xxx_device_info *di, status = POWER_SUPPLY_STATUS_NOT_CHARGING; else status = POWER_SUPPLY_STATUS_DISCHARGING; + } else { + if (di->cache.flags & BQ27XXX_FLAG_FC) + status = POWER_SUPPLY_STATUS_FULL; + else if (di->cache.flags & BQ27XXX_FLAG_DSC) + status = POWER_SUPPLY_STATUS_DISCHARGING; + else + status = POWER_SUPPLY_STATUS_CHARGING; } val->intval = status; @@ -624,21 +822,21 @@ static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di, { int level; - if (bq27xxx_is_chip_version_higher(di)) { - if (di->cache.flags & BQ27500_FLAG_FC) + if (di->chip == BQ27000 || di->chip == BQ27010) { + if (di->cache.flags & BQ27000_FLAG_FC) level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; - else if (di->cache.flags & BQ27500_FLAG_SOC1) + else if (di->cache.flags & BQ27000_FLAG_EDV1) level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; - else if (di->cache.flags & BQ27500_FLAG_SOCF) + else if (di->cache.flags & BQ27000_FLAG_EDVF) level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; else level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; } else { - if (di->cache.flags & BQ27000_FLAG_FC) + if (di->cache.flags & BQ27XXX_FLAG_FC) level = POWER_SUPPLY_CAPACITY_LEVEL_FULL; - else if (di->cache.flags & BQ27000_FLAG_EDV1) + else if (di->cache.flags & BQ27XXX_FLAG_SOC1) level = POWER_SUPPLY_CAPACITY_LEVEL_LOW; - else if (di->cache.flags & BQ27000_FLAG_EDVF) + else if (di->cache.flags & BQ27XXX_FLAG_SOCF) level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; else level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; @@ -658,7 +856,7 @@ static int bq27xxx_battery_voltage(struct bq27xxx_device_info *di, { int volt; - volt = bq27xxx_read(di, BQ27x00_REG_VOLT, false); + volt = bq27xxx_read(di, BQ27XXX_REG_VOLT, false); if (volt < 0) { dev_err(di->dev, "error reading voltage\n"); return volt; @@ -719,7 +917,7 @@ static int bq27xxx_battery_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_TEMP: ret = bq27xxx_simple_value(di->cache.temperature, val); if (ret == 0) - val->intval -= 2731; + val->intval -= 2731; /* convert decidegree k to c */ break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: ret = bq27xxx_simple_value(di->cache.time_to_empty, val); @@ -785,19 +983,8 @@ static int bq27xxx_powersupply_init(struct bq27xxx_device_info *di, psy_desc->name = name; psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; - if (di->chip == BQ27425) { - psy_desc->properties = bq27425_battery_props; - psy_desc->num_properties = ARRAY_SIZE(bq27425_battery_props); - } else if (di->chip == BQ27742) { - psy_desc->properties = bq27742_battery_props; - psy_desc->num_properties = ARRAY_SIZE(bq27742_battery_props); - } else if (di->chip == BQ27510) { - psy_desc->properties = bq27510_battery_props; - psy_desc->num_properties = ARRAY_SIZE(bq27510_battery_props); - } else { - psy_desc->properties = bq27x00_battery_props; - psy_desc->num_properties = ARRAY_SIZE(bq27x00_battery_props); - } + psy_desc->properties = bq27xxx_battery_props[di->chip].props; + psy_desc->num_properties = bq27xxx_battery_props[di->chip].size; psy_desc->get_property = bq27xxx_battery_get_property; psy_desc->external_power_changed = bq27xxx_external_power_changed; @@ -910,11 +1097,15 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client, di->dev = &client->dev; di->chip = id->driver_data; di->bus.read = &bq27xxx_battery_i2c_read; + di->regs = bq27xxx_regs[di->chip]; retval = bq27xxx_powersupply_init(di, name); if (retval) goto batt_failed; + /* Schedule a polling after about 1 min */ + schedule_delayed_work(&di->work, 60 * HZ); + i2c_set_clientdata(client, di); return 0; @@ -941,11 +1132,22 @@ static int bq27xxx_battery_i2c_remove(struct i2c_client *client) } static const struct i2c_device_id bq27xxx_id[] = { - { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */ + { "bq27200", BQ27000 }, + { "bq27210", BQ27010 }, { "bq27500", BQ27500 }, - { "bq27425", BQ27425 }, - { "bq27742", BQ27742 }, - { "bq27510", BQ27510 }, + { "bq27510", BQ27500 }, + { "bq27520", BQ27500 }, + { "bq27530", BQ27530 }, + { "bq27531", BQ27530 }, + { "bq27541", BQ27541 }, + { "bq27542", BQ27541 }, + { "bq27546", BQ27541 }, + { "bq27742", BQ27541 }, + { "bq27545", BQ27545 }, + { "bq27421", BQ27421 }, + { "bq27425", BQ27421 }, + { "bq27441", BQ27421 }, + { "bq27621", BQ27421 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq27xxx_id); |