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Date: Mon, 21 Sep 2015 10:46:01 +0200
From: Pali Rohár <pali.rohar@...il.com>
To: "Andrew F. Davis" <afd@...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 v4 5/7] power: bq27xxx_battery: Add support for
additional bq27xxx family devices
On Monday 14 September 2015 16:26:11 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);
> }
This if-else-if-else code is too long...
> 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 {
... and this too.
What about creating array indexed by chip enum which will contains
pointers to _regs and _props? With something like this you could reduce
code to just two assignments and separate battery properties into
semantical array variable(s)...
> + 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;
--
Pali Rohár
pali.rohar@...il.com
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