Add support to bq27742 in bq27x00 driver. bq27742 register addresses are mostly mostly the same as bq27500 addresses with minor differences.
Signed-off-by: Puthikorn Voravootivat <put...@chromium.org> Reviewed-by: Gwendal Grignou <gwen...@chromium.org> Reviewed-by: Rhyland Klein <rkl...@nvidia.com> --- Note: currently supported attributes below. localhost ~ # cat /sys/class/power_supply/bq27742-0/uevent POWER_SUPPLY_NAME=bq27742-0 POWER_SUPPLY_STATUS=Charging POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_VOLTAGE_NOW=3976000 POWER_SUPPLY_CURRENT_NOW=2953000 POWER_SUPPLY_CAPACITY=58 POWER_SUPPLY_CAPACITY_LEVEL=Normal POWER_SUPPLY_TEMP=258 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_CHARGE_FULL=0 POWER_SUPPLY_CHARGE_NOW=6393000 POWER_SUPPLY_CHARGE_FULL_DESIGN=10775000 POWER_SUPPLY_CYCLE_COUNT=2 POWER_SUPPLY_POWER_AVG=21677 POWER_SUPPLY_HEALTH=Good drivers/power/bq27x00_battery.c | 52 +++++++++++++++++++++++++++++++++++------ 1 file changed, 45 insertions(+), 7 deletions(-) diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index e10763e..5b9f0ea 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -23,6 +23,7 @@ * 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/bq27425-g1 + * http://www.ti.com/product/BQ27742-G1 */ #include <linux/device.h> @@ -71,6 +72,8 @@ #define BQ27500_FLAG_FC BIT(9) #define BQ27500_FLAG_OTC BIT(15) +#define BQ27742_POWER_AVG 0x76 + /* bq27425 register addresses are same as bq27x00 addresses minus 4 */ #define BQ27425_REG_OFFSET 0x04 #define BQ27425_REG_SOC 0x18 /* Register address plus offset */ @@ -83,7 +86,7 @@ struct bq27x00_access_methods { int (*read)(struct bq27x00_device_info *di, u8 reg, bool single); }; -enum bq27x00_chip { BQ27000, BQ27500, BQ27425}; +enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742}; struct bq27x00_reg_cache { int temperature; @@ -152,6 +155,24 @@ static enum power_supply_property bq27425_battery_props[] = { POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, }; +static enum power_supply_property bq27742_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_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_POWER_AVG, + POWER_SUPPLY_PROP_HEALTH, +}; + static unsigned int poll_interval = 360; module_param(poll_interval, uint, 0644); MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \ @@ -176,7 +197,7 @@ static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg, */ static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di) { - if (di->chip == BQ27425 || di->chip == BQ27500) + if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742) return true; return false; } @@ -189,7 +210,7 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di) { int rsoc; - if (di->chip == BQ27500) + if (di->chip == BQ27500 || di->chip == BQ27742) rsoc = bq27x00_read(di, BQ27500_REG_SOC, false); else if (di->chip == BQ27425) rsoc = bq27x00_read(di, BQ27425_REG_SOC, false); @@ -414,6 +435,7 @@ static void bq27x00_update(struct bq27x00_device_info *di) struct bq27x00_reg_cache cache = {0, }; bool is_bq27500 = di->chip == BQ27500; bool is_bq27425 = di->chip == BQ27425; + bool is_bq27742 = di->chip == BQ27742; cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); if ((cache.flags & 0xff) == 0xff) @@ -432,7 +454,11 @@ static void bq27x00_update(struct bq27x00_device_info *di) cache.health = -ENODATA; } else { cache.capacity = bq27x00_battery_read_rsoc(di); - if (!is_bq27425) { + if (is_bq27742) + cache.time_to_empty = + bq27x00_battery_read_time(di, + BQ27x00_REG_TTE); + else if (!is_bq27425) { cache.energy = bq27x00_battery_read_energy(di); cache.time_to_empty = bq27x00_battery_read_time(di, @@ -444,14 +470,22 @@ static void bq27x00_update(struct bq27x00_device_info *di) bq27x00_battery_read_time(di, BQ27x00_REG_TTF); } - cache.charge_full = bq27x00_battery_read_lmd(di); + if (!is_bq27742) + cache.charge_full = + bq27x00_battery_read_lmd(di); cache.health = bq27x00_battery_read_health(di); } cache.temperature = bq27x00_battery_read_temperature(di); if (!is_bq27425) cache.cycle_count = bq27x00_battery_read_cyct(di); - cache.power_avg = - bq27x00_battery_read_pwr_avg(di, BQ27x00_POWER_AVG); + if (is_bq27742) + cache.power_avg = + bq27x00_battery_read_pwr_avg(di, + BQ27742_POWER_AVG); + else + cache.power_avg = + bq27x00_battery_read_pwr_avg(di, + BQ27x00_POWER_AVG); /* We only have to read charge design full once */ if (di->charge_design_full <= 0) @@ -702,6 +736,9 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di) if (di->chip == BQ27425) { di->bat.properties = bq27425_battery_props; di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props); + } else if (di->chip == BQ27742) { + di->bat.properties = bq27742_battery_props; + di->bat.num_properties = ARRAY_SIZE(bq27742_battery_props); } else { di->bat.properties = bq27x00_battery_props; di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props); @@ -858,6 +895,7 @@ static const struct i2c_device_id bq27x00_id[] = { { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */ { "bq27500", BQ27500 }, { "bq27425", BQ27425 }, + { "bq27742", BQ27742 }, {}, }; MODULE_DEVICE_TABLE(i2c, bq27x00_id); -- 2.1.0.rc2.206.gedb03e5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
