diff options
Diffstat (limited to 'drivers/power/supply/rk817_charger.c')
| -rw-r--r-- | drivers/power/supply/rk817_charger.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/drivers/power/supply/rk817_charger.c b/drivers/power/supply/rk817_charger.c index 36f807b5ec44..1a2143641e66 100644 --- a/drivers/power/supply/rk817_charger.c +++ b/drivers/power/supply/rk817_charger.c @@ -335,6 +335,20 @@ static int rk817_bat_calib_cap(struct rk817_charger *charger) charger->fcc_mah * 1000); } + /* + * Set the SOC to 0 if we are below the minimum system voltage. + */ + if (volt_avg <= charger->bat_voltage_min_design_uv) { + charger->soc = 0; + charge_now_adc = CHARGE_TO_ADC(0, charger->res_div); + put_unaligned_be32(charge_now_adc, bulk_reg); + regmap_bulk_write(rk808->regmap, + RK817_GAS_GAUGE_Q_INIT_H3, bulk_reg, 4); + dev_warn(charger->dev, + "Battery voltage %d below minimum voltage %d\n", + volt_avg, charger->bat_voltage_min_design_uv); + } + rk817_record_battery_nvram_values(charger); return 0; @@ -710,9 +724,10 @@ static int rk817_read_battery_nvram_values(struct rk817_charger *charger) /* * Read the nvram for state of charge. Sanity check for values greater - * than 100 (10000). If the value is off it should get corrected - * automatically when the voltage drops to the min (soc is 0) or when - * the battery is full (soc is 100). + * than 100 (10000) or less than 0, because other things (BSP kernels, + * U-Boot, or even i2cset) can write to this register. If the value is + * off it should get corrected automatically when the voltage drops to + * the min (soc is 0) or when the battery is full (soc is 100). */ ret = regmap_bulk_read(charger->rk808->regmap, RK817_GAS_GAUGE_BAT_R1, bulk_reg, 3); @@ -721,6 +736,8 @@ static int rk817_read_battery_nvram_values(struct rk817_charger *charger) charger->soc = get_unaligned_le24(bulk_reg); if (charger->soc > 10000) charger->soc = 10000; + if (charger->soc < 0) + charger->soc = 0; return 0; } @@ -731,8 +748,8 @@ rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger, { struct rk808 *rk808 = charger->rk808; u8 bulk_reg[4]; - u32 boot_voltage, boot_charge_mah, tmp; - int ret, reg, off_time; + u32 boot_voltage, boot_charge_mah; + int ret, reg, off_time, tmp; bool first_boot; /* @@ -785,10 +802,12 @@ rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger, regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3, bulk_reg, 4); tmp = get_unaligned_be32(bulk_reg); + if (tmp < 0) + tmp = 0; boot_charge_mah = ADC_TO_CHARGE_UAH(tmp, charger->res_div) / 1000; /* - * Check if the columb counter has been off for more than 300 + * Check if the columb counter has been off for more than 30 * minutes as it tends to drift downward. If so, re-init soc * with the boot voltage instead. Note the unit values for the * OFF_CNT register appear to be in decaminutes and stops @@ -799,7 +818,7 @@ rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger, * than 0 on a reboot anyway. */ regmap_read(rk808->regmap, RK817_GAS_GAUGE_OFF_CNT, &off_time); - if (off_time >= 30) { + if (off_time >= 3) { regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_PWRON_VOL_H, bulk_reg, 2); @@ -816,19 +835,6 @@ rk817_read_or_set_full_charge_on_boot(struct rk817_charger *charger, } } - regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_PWRON_VOL_H, - bulk_reg, 2); - tmp = get_unaligned_be16(bulk_reg); - boot_voltage = (charger->voltage_k * tmp) + 1000 * charger->voltage_b; - regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_Q_PRES_H3, - bulk_reg, 4); - tmp = get_unaligned_be32(bulk_reg); - boot_charge_mah = ADC_TO_CHARGE_UAH(tmp, charger->res_div) / 1000; - regmap_bulk_read(rk808->regmap, RK817_GAS_GAUGE_OCV_VOL_H, - bulk_reg, 2); - tmp = get_unaligned_be16(bulk_reg); - boot_voltage = (charger->voltage_k * tmp) + 1000 * charger->voltage_b; - /* * Now we have our full charge capacity and soc, init the columb * counter. |