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Code Issues Releases Wiki Activity

power: supply: mm8013: Add more properties 

While scanning the internet for MM8013 PDFs, I found one for a different
IC from Mitsumi, MM8118 at [1]. It turned out however, that when you
search through the PDF, the MM8118 text has an invsible text layer
containing "MM8013" underneath..

With some elbow grease, I was able to confirm that most of the registers
match between the two ICs. Based on that finding, introduce live battery
voltage readout, hw-decided charge behavior readout and max current
readout. Also, expand the existing POWER_SUPPLY_HEALTH reporting.

[1] https://product.minebeamitsumi.com/en/product/category/ics/battery/fuel_gauge/parts/download/__icsFiles/afieldfile/2023/07/12/1_download_01_12.pdf

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230916-topic-mm8013_2-v1-1-02495e07fca0@linaro.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Konrad Dybcio 2023-09-16 02:31:59 +02:00 committed by Sebastian Reichel
parent f8d7a3d211
commit e39257cde7
1 changed files with 43 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
drivers/power/supply/mm8013.c
View File

@ -17,13 +17,21 @@
#define MM8013_FLAG_OTC BIT(15)
#define MM8013_FLAG_OTD BIT(14)
#define MM8013_FLAG_BATHI BIT(13)
#define MM8013_FLAG_BATLOW BIT(12)
#define MM8013_FLAG_CHG_INH BIT(11)
#define MM8013_FLAG_FC BIT(9)
#define MM8013_FLAG_CHG BIT(8)
#define MM8013_FLAG_OCC BIT(6)
#define MM8013_FLAG_ODC BIT(5)
#define MM8013_FLAG_OT BIT(4)
#define MM8013_FLAG_UT BIT(3)
#define MM8013_FLAG_DSG BIT(0)
#define REG_FULL_CHARGE_CAPACITY 0x0e
#define REG_NOMINAL_CHARGE_CAPACITY 0x0c
#define REG_AVERAGE_CURRENT 0x14
#define REG_AVERAGE_TIME_TO_EMPTY 0x16
#define REG_AVERAGE_TIME_TO_FULL 0x18
#define REG_MAX_LOAD_CURRENT 0x1e
#define REG_CYCLE_COUNT 0x2a
#define REG_STATE_OF_CHARGE 0x2c
#define REG_DESIGN_CAPACITY 0x3c
@ -63,8 +71,11 @@ static int mm8013_checkdevice(struct mm8013_chip *chip)
static enum power_supply_property mm8013_battery_props[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_HEALTH,
@ -92,6 +103,16 @@ static int mm8013_get_property(struct power_supply *psy,
val->intval = regval;
break;
case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
ret = regmap_read(chip->regmap, REG_FLAGS, &regval);
if (ret < 0)
return ret;
if (regval & MM8013_FLAG_CHG_INH)
val->intval = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
else
val->intval = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
ret = regmap_read(chip->regmap, REG_FULL_CHARGE_CAPACITY, &regval);
if (ret < 0)
@ -106,6 +127,20 @@ static int mm8013_get_property(struct power_supply *psy,
val->intval = 1000 * regval;
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
ret = regmap_read(chip->regmap, REG_NOMINAL_CHARGE_CAPACITY, &regval);
if (ret < 0)
return ret;
val->intval = 1000 * regval;
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
ret = regmap_read(chip->regmap, REG_MAX_LOAD_CURRENT, &regval);
if (ret < 0)
return ret;
val->intval = -1000 * (s16)regval;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = regmap_read(chip->regmap, REG_AVERAGE_CURRENT, &regval);
if (ret < 0)
@ -125,9 +160,15 @@ static int mm8013_get_property(struct power_supply *psy,
if (ret < 0)
return ret;
if (regval & MM8013_FLAG_BATHI)
if (regval & MM8013_FLAG_UT)
val->intval = POWER_SUPPLY_HEALTH_COLD;
else if (regval & (MM8013_FLAG_ODC | MM8013_FLAG_OCC))
val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
else if (regval & (MM8013_FLAG_BATLOW))
val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
else if (regval & MM8013_FLAG_BATHI)
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
else if (regval & (MM8013_FLAG_OTD | MM8013_FLAG_OTC))
else if (regval & (MM8013_FLAG_OT | MM8013_FLAG_OTD | MM8013_FLAG_OTC))
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;