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fuel gauge: rk817: calibrate the fuel gauge, when the system is powered on 

There is an error with the fuel gauge, so we need to calibrate it.

Change-Id: I649cacaa97c69fd47bad6f6d02a7569e735b7a80
Signed-off-by: shengfei Xu <xsf@rock-chips.com>
This commit is contained in:
shengfei Xu 2018-06-15 10:36:53 +08:00 committed by Xushengfei
parent 50a5d4fff3
commit 8d2f64435d
1 changed files with 95 additions and 24 deletions
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95
drivers/power/fuel_gauge/fg_rk817.c
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@ -434,8 +434,11 @@ static void rk817_bat_init_coulomb_cap(struct rk817_battery_device *battery,
{
u8 buf;
u32 cap;
u32 val;
cap = CAPACITY_TO_ADC(capacity, battery->res_div);
do {
buf = (cap >> 24) & 0xff;
rk817_bat_write(battery, Q_INIT_H3, buf);
buf = (cap >> 16) & 0xff;
@ -445,6 +448,12 @@ static void rk817_bat_init_coulomb_cap(struct rk817_battery_device *battery,
buf = (cap >> 0) & 0xff;
rk817_bat_write(battery, Q_INIT_L0, buf);
val = rk817_bat_read(battery, Q_INIT_H3) << 24;
val |= rk817_bat_read(battery, Q_INIT_H2) << 16;
val |= rk817_bat_read(battery, Q_INIT_L1) << 8;
val |= rk817_bat_read(battery, Q_INIT_L0) << 0;
} while (cap != val);
battery->rsoc = capacity * 1000 * 100 / battery->fcc;
battery->remain_cap = capacity * 1000;
}
@ -465,8 +474,6 @@ static u32 rk817_bat_get_capacity_uah(struct rk817_battery_device *battery)
val |= rk817_bat_read(battery, Q_PRES_L0) << 0;
capacity = ADC_TO_CAPACITY_UAH(val, battery->res_div);
} else {
rk817_bat_init_coulomb_cap(battery, 0);
}
return capacity;
@ -481,10 +488,7 @@ static u32 rk817_bat_get_capacity_mah(struct rk817_battery_device *battery)
val |= rk817_bat_read(battery, Q_PRES_H2) << 16;
val |= rk817_bat_read(battery, Q_PRES_L1) << 8;
val |= rk817_bat_read(battery, Q_PRES_L0) << 0;
capacity = ADC_TO_CAPACITY(val, battery->res_div);
} else {
rk817_bat_init_coulomb_cap(battery, 0);
}
return capacity;
@ -694,13 +698,25 @@ static bool is_rk817_bat_last_halt(struct rk817_battery_device *battery)
int pre_cap = rk817_bat_get_prev_cap(battery);
int now_cap = rk817_bat_get_capacity_mah(battery);
battery->nac = rk817_bat_vol_to_cap(battery,
battery->pwron_voltage);
/* over 10%: system halt last time */
if (now_cap > pre_cap) {
if (abs(now_cap - pre_cap) > (battery->fcc / 10)) {
rk817_bat_inc_halt_cnt(battery);
return true;
} else {
return false;
}
} else {
if (abs(battery->nac - pre_cap) > (battery->fcc / 5)) {
rk817_bat_inc_halt_cnt(battery);
return true;
} else {
return false;
}
}
}
static u8 rk817_bat_get_halt_cnt(struct rk817_battery_device *battery)
@ -725,23 +741,78 @@ static void rk817_bat_set_initialized_flag(struct rk817_battery_device *battery)
static void rk817_bat_not_first_pwron(struct rk817_battery_device *battery)
{
int now_cap, pre_soc, pre_cap;
int is_charge = 0, temp_soc = 0;
battery->fcc = rk817_bat_get_fcc(battery);
pre_soc = rk817_bat_get_prev_dsoc(battery);
pre_cap = rk817_bat_get_prev_cap(battery);
now_cap = rk817_bat_get_capacity_mah(battery);
battery->halt_cnt = rk817_bat_get_halt_cnt(battery);
battery->nac = rk817_bat_vol_to_cap(battery,
battery->pwron_voltage);
battery->pwroff_min = rk817_bat_get_off_count(battery);
battery->remain_cap = pre_cap * 1000;
battery->is_halt = is_rk817_bat_last_halt(battery);
battery->halt_cnt = rk817_bat_get_halt_cnt(battery);
if (battery->is_halt) {
DBG("system halt last time... cap: pre=%d, now=%d\n",
pre_cap, now_cap);
if (now_cap < 0)
now_cap = 0;
rk817_bat_init_coulomb_cap(battery, now_cap);
if (now_cap == 0) {
if (battery->pwroff_min > 3) {
battery->nac = rk817_bat_vol_to_cap(battery,
battery->pwron_voltage);
now_cap = battery->nac;
pre_cap = now_cap;
printf("now_cap 0x%x\n", now_cap);
} else {
now_cap = pre_cap;
}
rk817_bat_init_coulomb_cap(battery, now_cap);
goto finish;
}
if (now_cap > pre_cap) {
is_charge = 1;
if ((now_cap > battery->fcc * 2) &&
((battery->pwroff_min > 0) &&
(battery->pwroff_min < 3))) {
now_cap = pre_cap;
is_charge = 0;
}
} else {
is_charge = 0;
}
if (is_charge == 0) {
if ((battery->pwroff_min >= 0) && (battery->pwroff_min < 3)) {
rk817_bat_init_coulomb_cap(battery, pre_cap);
rk817_bat_get_capacity_mah(battery);
goto finish;
}
if (battery->pwroff_min >= 3) {
if (battery->nac > pre_cap) {
rk817_bat_init_coulomb_cap(battery,
battery->nac);
rk817_bat_get_capacity_mah(battery);
pre_cap = battery->nac;
goto finish;
}
if ((pre_cap - battery->nac) > (battery->fcc / 10)) {
rk817_bat_inc_halt_cnt(battery);
temp_soc = (pre_cap - battery->nac) * 1000 * 100 / battery->fcc;
pre_soc -= temp_soc;
pre_cap = battery->nac;
if (pre_soc <= 0)
pre_soc = 0;
goto finish;
}
}
} else {
battery->remain_cap = rk817_bat_get_capacity_uah(battery);
battery->rsoc = rk817_bat_get_rsoc(battery);
pre_soc = battery->rsoc;
pre_cap = battery->remain_cap;
goto finish;
}
finish: