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Message-ID: <55C4CA09.4090903@ti.com>
Date: Fri, 7 Aug 2015 10:08:57 -0500
From: "Andrew F. Davis" <afd@...com>
To: Pali Rohár <pali.rohar@...il.com>
CC: Sebastian Reichel <sre@...nel.org>,
Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
David Woodhouse <dwmw2@...radead.org>,
Dan Murphy <dmurphy@...com>, <linux-pm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 5/6] power: bq27xxx_battery: Add support for additional
bq27xxx family devices
On 08/06/2015 03:28 AM, Pali Rohár wrote:
> On Wednesday 05 August 2015 11:05:39 Andrew F. Davis wrote:
>> Add support for additional devices and register equivalent family devices
>> including the bq27010, bq27210, bq27500, bq27510, bq27520, bq27530,
>> bq27531, bq27541, bq27542, bq27546, bq27545, bq27441, bq27421, and the
>> bq27641.
>>
>> To facilitate this process the register mapings have been moved to tables
>> and other small cleanups have been made.
>>
>> Signed-off-by: Andrew F. Davis <afd@...com>
>> ---
>> drivers/power/bq27xxx_battery.c | 627 +++++++++++++++++++++++-----------
>> include/linux/power/bq27xxx_battery.h | 10 +-
>> 2 files changed, 428 insertions(+), 209 deletions(-)
>>
>> diff --git a/drivers/power/bq27xxx_battery.c b/drivers/power/bq27xxx_battery.c
>> index 1ff88ad..3098609 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 +137,152 @@ 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 enum power_supply_property bq27000_battery_props[] = {
>> POWER_SUPPLY_PROP_STATUS,
>> POWER_SUPPLY_PROP_PRESENT,
>> POWER_SUPPLY_PROP_VOLTAGE_NOW,
>> @@ -145,7 +304,7 @@ 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 +312,19 @@ 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 +338,29 @@ 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 +379,39 @@ 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,
>> +};
>> +
>> static unsigned int poll_interval = 360;
>> module_param(poll_interval, uint, 0644);
>> MODULE_PARM_DESC(poll_interval,
>> @@ -207,25 +421,14 @@ 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 +439,7 @@ 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 +462,10 @@ 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 +477,46 @@ 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 +527,16 @@ 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 +549,13 @@ 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 +569,7 @@ 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 +601,32 @@ 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 +635,43 @@ 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 +681,26 @@ 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 +715,8 @@ 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 +738,23 @@ 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 +765,7 @@ 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 +774,13 @@ 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 +793,21 @@ 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 +827,7 @@ 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 +888,7 @@ 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);
>> @@ -785,18 +954,27 @@ 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);
>> + if (di->chip == BQ27000) {
>> + psy_desc->properties = bq27000_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27000_battery_props);
>> + } else if (di->chip == BQ27010) {
>> + psy_desc->properties = bq27010_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27010_battery_props);
>> + } else if (di->chip == BQ27500) {
>> + psy_desc->properties = bq27500_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27500_battery_props);
>> + } else if (di->chip == BQ27530) {
>> + psy_desc->properties = bq27530_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27530_battery_props);
>> + } else if (di->chip == BQ27541) {
>> + psy_desc->properties = bq27541_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27541_battery_props);
>> + } else if (di->chip == BQ27545) {
>> + psy_desc->properties = bq27545_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27545_battery_props);
>> } else {
>> - psy_desc->properties = bq27x00_battery_props;
>> - psy_desc->num_properties = ARRAY_SIZE(bq27x00_battery_props);
>> + psy_desc->properties = bq27421_battery_props;
>> + psy_desc->num_properties = ARRAY_SIZE(bq27421_battery_props);
>> }
>> psy_desc->get_property = bq27xxx_battery_get_property;
>> psy_desc->external_power_changed = bq27xxx_external_power_changed;
>> @@ -911,10 +1089,32 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
>> di->chip = id->driver_data;
>> di->bus.read = &bq27xxx_battery_i2c_read;
>>
>> + if (di->chip == BQ27000) {
>> + di->regs = bq27000_regs;
>> + } else if (di->chip == BQ27010) {
>> + di->regs = bq27010_regs;
>> + } else if (di->chip == BQ27500) {
>> + di->regs = bq27500_regs;
>> + } else if (di->chip == BQ27530) {
>> + di->regs = bq27530_regs;
>> + } else if (di->chip == BQ27541) {
>> + di->regs = bq27541_regs;
>> + } else if (di->chip == BQ27545) {
>> + di->regs = bq27545_regs;
>> + } else if (di->chip == BQ27421) {
>> + di->regs = bq27421_regs;
>> + } else {
>> + dev_err(&client->dev, "Unexpected gas gauge: %d\n", di->chip);
>> + di->regs = bq27000_regs;
>> + }
>> +
>> 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 +1141,22 @@ 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);
>> diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
>> index a4efb10..45f6a7b 100644
>> --- a/include/linux/power/bq27xxx_battery.h
>> +++ b/include/linux/power/bq27xxx_battery.h
>> @@ -12,7 +12,15 @@
>> * register to be read. The return value should either be the content of
>> * the passed register or an error value.
>> */
>> -enum bq27xxx_chip { BQ27000 = 1, BQ27500, BQ27425, BQ27742, BQ27510 };
>> +enum bq27xxx_chip {
>> + BQ27000 = 1, /* bq27000, bq27200 */
>> + BQ27010, /* bq27010, bq27210 */
>> + BQ27500, /* bq27500, bq27510, bq27520 */
>> + BQ27530, /* bq27530, bq27531 */
>> + BQ27541, /* bq27541, bq27542, bq27546, bq27742 */
>> + BQ27545, /* bq27545 */
>> + BQ27421, /* bq27421, bq27425, bq27441, bq27621 */
>> +};
>>
>> struct bq27xxx_platform_data {
>> const char *name;
>
> In whole patch I see this usage pattern:
>
> if (chip == 1)
> ...
> else if (chip == 2)
> ...
> else if (chip == 3)
> ...
>
> Maybe it is just syntax taste, but it is not better to use switch
> instead lot of if-else construction? What other people prefer? I thought
> that in kernel we prefer switch-case instead big if-else. I would like
> to know what to use for *new* code/patches so we will same syntax style.
>
I would prefer the switch-case myself, I chose the if-else to match the
existing style in this driver, I can change it if needed or I can do
that in a later patch series.
--
Andrew F. Davis
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