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.
Signed-off-by: LI Qingwu <Qing-wu.Li@xxxxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
result of cat "/sys/class/power_supply/<bat_name>/uevent"
CASE I: Discharging current>0:
POWER_SUPPLY_NAME=bq78z100-0
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_VOLTAGE_NOW=3405000
POWER_SUPPLY_CURRENT_NOW=4000
POWER_SUPPLY_CAPACITY=28
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_TEMP=259
POWER_SUPPLY_TIME_TO_EMPTY_NOW=1611000
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CHARGE_FULL=6494000
POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
POWER_SUPPLY_CYCLE_COUNT=1
POWER_SUPPLY_ENERGY_NOW=0
POWER_SUPPLY_POWER_AVG=65535
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_MANUFACTURER=Texas Instruments
CASE II : No discharging current:
POWER_SUPPLY_NAME=bq78z100-0
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_VOLTAGE_NOW=3405000
POWER_SUPPLY_CURRENT_NOW=0
POWER_SUPPLY_CAPACITY=28
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_TEMP=260
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CHARGE_FULL=6494000
POWER_SUPPLY_CHARGE_FULL_DESIGN=6000000
POWER_SUPPLY_CYCLE_COUNT=1
POWER_SUPPLY_ENERGY_NOW=0
POWER_SUPPLY_POWER_AVG=0
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_MANUFACTURER=Texas Instruments
---
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 4c4a7b1c64c5..05a4f9190160 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 <linux/device.h>
@@ -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_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CYCLE_COUNT,
+ POWER_SUPPLY_PROP_ENERGY_NOW,
+ 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, 0x00000000, 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 eb4f4284982f..46f078350fd3 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 111a40d0d3d5..ac17618043b1 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;
--
2.17.1
