google_battery: implement bhi algo by impedance
Bug: 224784618
Signed-off-by: Jack Wu <[email protected]>
Change-Id: Iebcae07fb3fcc15cc94174c3e92f00ea8345e5ce
diff --git a/max1720x_battery.c b/max1720x_battery.c
index 704126e..e1763e5 100644
--- a/max1720x_battery.c
+++ b/max1720x_battery.c
@@ -60,6 +60,13 @@
#define FILTERCFG_TEMP_HYSTERESIS 30
+#define BHI_IMPEDANCE_SOC_LO 50
+#define BHI_IMPEDANCE_SOC_HI 55
+#define BHI_IMPEDANCE_TEMP_LO 250
+#define BHI_IMPEDANCE_TEMP_HI 300
+#define BHI_IMPEDANCE_CYCLE_CNT_DELTA 2
+#define BHI_IMPEDANCE_TIMERH 50 /* 7*24 / 3.2hr */
+
#include "max1720x.h"
#include "max1730x.h"
#include "max_m5.h"
@@ -234,6 +241,9 @@
u16 pre_repsoc;
struct power_supply_desc max1720x_psy_desc;
+
+ int bhi_cycle_count;
+ int bhi_last_timerh;
};
#define MAX1720_EMPTY_VOLTAGE(profile, temp, cycle) \
@@ -1885,6 +1895,80 @@
return err;
}
+/* call holding chip->model_lock */
+static int max1720x_check_impedance(struct max1720x_chip *chip)
+{
+ struct max17x0x_regmap *map = &chip->regmap;
+ int soc, temp, cycle_count, delta, ret;
+ u16 data, timerh;
+
+ if (!chip->model_state_valid)
+ return -EAGAIN;
+
+ soc = max1720x_get_battery_soc(chip);
+ if (soc < BHI_IMPEDANCE_SOC_LO || soc > BHI_IMPEDANCE_SOC_HI)
+ return -ENODATA;
+
+ ret = max17x0x_reg_read(map, MAX17X0X_TAG_temp, &data);
+ if (ret < 0)
+ return -EINVAL;
+
+ temp = reg_to_deci_deg_cel(data);
+ if (temp < BHI_IMPEDANCE_TEMP_LO || temp > BHI_IMPEDANCE_TEMP_HI)
+ return -ENODATA;
+
+ ret = REGMAP_READ(&chip->regmap, MAX1720X_TIMERH, &timerh);
+ if (ret < 0 || timerh == chip->bhi_last_timerh)
+ return ret < 0 ? -EINVAL : -ENODATA;
+
+ cycle_count = max1720x_get_cycle_count(chip);
+ if (cycle_count < 0)
+ return -EINVAL;
+
+ /* POR reset */
+ if (!timerh || !chip->bhi_cycle_count)
+ chip->bhi_cycle_count = cycle_count;
+
+ delta = cycle_count - chip->bhi_cycle_count;
+
+ if (delta < BHI_IMPEDANCE_CYCLE_CNT_DELTA && timerh < BHI_IMPEDANCE_TIMERH)
+ return -ENODATA;
+
+ chip->bhi_last_timerh = timerh;
+
+ return 0;
+}
+
+/* will return error if the value is not qualified */
+static int max1720x_get_health_impedance(struct max1720x_chip *chip)
+{
+ u16 data, act_impedance;
+ int ret;
+
+ ret = max1720x_check_impedance(chip);
+ if (ret < 0)
+ return ret;
+
+ ret = gbms_storage_read(GBMS_TAG_ACIM, &data, sizeof(data));
+ if (ret < 0)
+ return -EINVAL;
+
+ act_impedance = data;
+ if (act_impedance == 0xffff) {
+ u16 resistance;
+
+ ret = REGMAP_READ(&chip->regmap, MAX1720X_RCELL, &data);
+ if (ret < 0)
+ return -EINVAL;
+
+ resistance = reg_to_resistance_micro_ohms(data, chip->RSense);
+ ret = gbms_storage_write(GBMS_TAG_ACIM, &resistance, sizeof(resistance));
+ return (ret < 0) ? -EINVAL : resistance;
+ }
+
+ return act_impedance;
+}
+
static int max1720x_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@@ -2078,6 +2162,10 @@
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
val->strval = chip->serial_number;
break;
+ case GBMS_PROP_HEALTH_ACT_IMPEDANCE:
+ /* get activation impedance (and only if qualified) */
+ val->intval = max1720x_get_health_impedance(chip);
+ break;
default:
err = -EINVAL;
break;
@@ -5033,6 +5121,8 @@
chip->fake_capacity = -EINVAL;
chip->resume_complete = true;
chip->init_complete = true;
+ chip->bhi_cycle_count = 0;
+ chip->bhi_last_timerh = 0;
max17x0x_init_debugfs(chip);
/*
