From 4eed7f5a8334a179f40b2c78c1ead572b9dd04a0 Mon Sep 17 00:00:00 2001 From: LI Qingwu Date: Fri, 19 Mar 2021 11:02:36 +0000 Subject: [PATCH] power: supply: bq27xxx: Add support for BQ78Z100 Add support for TI BQ78Z100, I2C interface gas gauge. It provides a fully integrated safety protection and authentication for 1 to 2-series cell Li-Ion and Li-Polymer battery packs. The patch was tested with BQ78Z100 equipment. CASE I: Discharging: POWER_SUPPLY_NAME=bq78z100-0 POWER_SUPPLY_STATUS=Discharging POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_VOLTAGE_NOW=3386000 POWER_SUPPLY_CURRENT_NOW=-5000 POWER_SUPPLY_CAPACITY=27 POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_TEMP=269 POWER_SUPPLY_TIME_TO_EMPTY_NOW=1249920 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CHARGE_FULL=6494000 POWER_SUPPLY_CHARGE_NOW=1736000 POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000 POWER_SUPPLY_CYCLE_COUNT=1 POWER_SUPPLY_POWER_AVG=-20000 POWER_SUPPLY_HEALTH=Good POWER_SUPPLY_MANUFACTURER=Texas Instruments CASE II : No discharging current: POWER_SUPPLY_NAME=bq78z100-0 POWER_SUPPLY_STATUS=Not charging POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_VOLTAGE_NOW=3386000 POWER_SUPPLY_CURRENT_NOW=0 POWER_SUPPLY_CAPACITY=27 POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_TEMP=270 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CHARGE_FULL=6494000 POWER_SUPPLY_CHARGE_NOW=1734000 POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000 POWER_SUPPLY_CYCLE_COUNT=1 POWER_SUPPLY_POWER_AVG=0 POWER_SUPPLY_HEALTH=Good POWER_SUPPLY_MANUFACTURER=Texas Instruments Signed-off-by: LI Qingwu Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel --- drivers/power/supply/bq27xxx_battery.c | 44 ++++++++++++++++++++++++++++++ drivers/power/supply/bq27xxx_battery_i2c.c | 2 ++ include/linux/power/bq27xxx_battery.h | 1 + 3 files changed, 47 insertions(+) diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c index b62a8cf..7e5e24b 100644 --- a/drivers/power/supply/bq27xxx_battery.c +++ b/drivers/power/supply/bq27xxx_battery.c @@ -39,6 +39,7 @@ * https://www.ti.com/product/bq27z561 * https://www.ti.com/product/bq28z610 * https://www.ti.com/product/bq34z100-g1 + * https://www.ti.com/product/bq78z100 */ #include @@ -515,6 +516,27 @@ static u8 [BQ27XXX_REG_DCAP] = 0x3c, [BQ27XXX_REG_AP] = 0x22, BQ27XXX_DM_REG_ROWS, + }, + bq78z100_regs[BQ27XXX_REG_MAX] = { + [BQ27XXX_REG_CTRL] = 0x00, + [BQ27XXX_REG_TEMP] = 0x06, + [BQ27XXX_REG_INT_TEMP] = 0x28, + [BQ27XXX_REG_VOLT] = 0x08, + [BQ27XXX_REG_AI] = 0x14, + [BQ27XXX_REG_FLAGS] = 0x0a, + [BQ27XXX_REG_TTE] = 0x16, + [BQ27XXX_REG_TTF] = 0x18, + [BQ27XXX_REG_TTES] = 0x1c, + [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, + [BQ27XXX_REG_NAC] = INVALID_REG_ADDR, + [BQ27XXX_REG_RC] = 0x10, + [BQ27XXX_REG_FCC] = 0x12, + [BQ27XXX_REG_CYCT] = 0x2a, + [BQ27XXX_REG_AE] = INVALID_REG_ADDR, + [BQ27XXX_REG_SOC] = 0x2c, + [BQ27XXX_REG_DCAP] = 0x3c, + [BQ27XXX_REG_AP] = 0x22, + BQ27XXX_DM_REG_ROWS, }; static enum power_supply_property bq27000_props[] = { @@ -813,6 +835,26 @@ static enum power_supply_property bq34z100_props[] = { POWER_SUPPLY_PROP_MANUFACTURER, }; +static enum power_supply_property bq78z100_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_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_POWER_AVG, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + struct bq27xxx_dm_reg { u8 subclass_id; u8 offset; @@ -911,6 +953,7 @@ static struct bq27xxx_dm_reg bq27621_dm_regs[] = { #define bq27z561_dm_regs 0 #define bq28z610_dm_regs 0 #define bq34z100_dm_regs 0 +#define bq78z100_dm_regs 0 #define BQ27XXX_O_ZERO BIT(0) #define BQ27XXX_O_OTDC BIT(1) /* has OTC/OTD overtemperature flags */ @@ -969,6 +1012,7 @@ static struct { [BQ28Z610] = BQ27XXX_DATA(bq28z610, 0 , BQ27Z561_O_BITS), [BQ34Z100] = BQ27XXX_DATA(bq34z100, 0 , BQ27XXX_O_OTDC | BQ27XXX_O_SOC_SI | \ BQ27XXX_O_HAS_CI | BQ27XXX_O_MUL_CHEM), + [BQ78Z100] = BQ27XXX_DATA(bq78z100, 0 , BQ27Z561_O_BITS), }; static DEFINE_MUTEX(bq27xxx_list_lock); diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c index eb4f428..46f0783 100644 --- a/drivers/power/supply/bq27xxx_battery_i2c.c +++ b/drivers/power/supply/bq27xxx_battery_i2c.c @@ -248,6 +248,7 @@ static const struct i2c_device_id bq27xxx_i2c_id_table[] = { { "bq27z561", BQ27Z561 }, { "bq28z610", BQ28Z610 }, { "bq34z100", BQ34Z100 }, + { "bq78z100", BQ78Z100 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq27xxx_i2c_id_table); @@ -284,6 +285,7 @@ static const struct of_device_id bq27xxx_battery_i2c_of_match_table[] = { { .compatible = "ti,bq27z561" }, { .compatible = "ti,bq28z610" }, { .compatible = "ti,bq34z100" }, + { .compatible = "ti,bq78z100" }, {}, }; MODULE_DEVICE_TABLE(of, bq27xxx_battery_i2c_of_match_table); diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h index 8d5f4f4..a1aa681 100644 --- a/include/linux/power/bq27xxx_battery.h +++ b/include/linux/power/bq27xxx_battery.h @@ -33,6 +33,7 @@ enum bq27xxx_chip { BQ27Z561, BQ28Z610, BQ34Z100, + BQ78Z100, }; struct bq27xxx_device_info; -- 2.7.4