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 <Qing-wu.Li@leica-geosystems.com.cn>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index b62a8cf..7e5e24b 100644 (file)
--- 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_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 (file)
--- 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 (file)
--- 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;