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Stop charging by paired battery

Browse source 
It's not reasonable to allow paired main battery to
charge the backup battery, as the main battery is
constant power supply for the system power, and it
does not benefit the principle to keep the main battery
voltage no less than backup battery.

Force battery soc to 0 only if paired battery volatge
is lower than empty voltage and soc becomes to 0.

Change-Id: Ifdaed984565f3c696d08fa43696e5b563930adf4
Signed-off-by: Yonghua Yan <yanyh2@motorola.com>
Reviewed-on: https://gerrit.mot.com/2294021
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Jianqi Yang <yangj@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Yonghua Yan 2022-06-08 22:35:57 +08:00
commit 15dd6d3da4
1 changed files with 38 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

75
drivers/power/sgm4154x_charger_lite/sgm4154x_charger_lite.c
View file

@ -2005,6 +2005,7 @@ static int sgm4154x_hw_chipid_detect(struct sgm4154x_device *sgm)
return val;
}
#define EMPTY_BATTERY_VBAT 3200
static int sgm4154x_charger_get_batt_info(void *data, struct mmi_battery_info *batt_info)
{
int rc;
@ -2037,7 +2038,8 @@ static int sgm4154x_charger_get_batt_info(void *data, struct mmi_battery_info *b
chg->batt_info.batt_status = POWER_SUPPLY_STATUS_FULL;
memcpy(batt_info, &chg->batt_info, sizeof(struct mmi_battery_info));
if (chg->paired_batt_info.batt_soc == 0) {
if (chg->paired_batt_info.batt_soc == 0 &&
chg->paired_batt_info.batt_mv < EMPTY_BATTERY_VBAT) {
batt_info->batt_soc = 0;
pr_warn("Force %s to empty from %d for empty paired battery\n",
chg->fg_psy->desc->name,
@ -2277,7 +2279,8 @@ static void sgm4154x_paired_battery_notify(void *data,
int paired_ichg = chg->paired_ichg;
int paired_load = chg->paired_load;
static int panic_deb_cnt = 0;
static bool chg_present = false;
static bool prev_high_load_en = false;
static bool prev_low_load_en = false;
if (!batt_info || batt_info->batt_mv <= 0) {
pr_warn("Invalid paired battery info\n");
@ -2347,56 +2350,54 @@ static void sgm4154x_paired_battery_notify(void *data,
} else {
panic_deb_cnt = 0;
}
chg->paired_load = paired_load;
}
if (paired_load != chg->paired_load ||
chg_present != chg->chg_info.chrg_present) {
chg->paired_load = paired_load;
chg_present = chg->chg_info.chrg_present;
switch (paired_load) {
case PAIRED_LOAD_OFF:
high_load_en = false;
low_load_en = false;
break;
case PAIRED_LOAD_LOW:
high_load_en = false;
low_load_en = true;
break;
case PAIRED_LOAD_HIGH:
default:
high_load_en = true;
low_load_en = false;
}
switch (chg->paired_load) {
case PAIRED_LOAD_OFF:
high_load_en = false;
low_load_en = false;
break;
case PAIRED_LOAD_LOW:
high_load_en = false;
low_load_en = true;
break;
case PAIRED_LOAD_HIGH:
high_load_en = true;
low_load_en = false;
break;
default:
high_load_en = prev_high_load_en;
low_load_en = prev_low_load_en;
}
/* Turn off load switch if paired battery is charging */
if (chg_present && batt_info->batt_ma > 0) {
high_load_en = false;
low_load_en = false;
}
/* Turn off load switch to stop charging by paired battery */
if (delta_ocv < 0 ||
(chg->chg_info.chrg_present &&
chg->chg_info.chrg_ma > 0 &&
batt_info->batt_ma >= 0)) {
high_load_en = false;
low_load_en = false;
}
if (high_load_en != prev_high_load_en) {
if (gpio_is_valid(chg->sgm->high_load_en_gpio)) {
gpio_set_value(chg->sgm->high_load_en_gpio,
high_load_en ^ chg->sgm->high_load_active_low);
}
prev_high_load_en = high_load_en;
}
if (low_load_en != prev_low_load_en) {
if (gpio_is_valid(chg->sgm->low_load_en_gpio)) {
gpio_set_value(chg->sgm->low_load_en_gpio,
low_load_en ^ chg->sgm->low_load_active_low);
}
prev_low_load_en = low_load_en;
}
if (gpio_is_valid(chg->sgm->high_load_en_gpio))
high_load_en = gpio_get_value(chg->sgm->high_load_en_gpio)
^ chg->sgm->high_load_active_low;
else
high_load_en = false;
if (gpio_is_valid(chg->sgm->low_load_en_gpio))
low_load_en = gpio_get_value(chg->sgm->low_load_en_gpio)
^ chg->sgm->low_load_active_low;
else
low_load_en = false;
pr_info("charger_present:%d, charger_suspend:%d, paired_ocv:%dmV, batt_ocv:%dmV\n",
chg_present, chg->sgm->state.hiz_en, paired_ocv, batt_ocv);
chg->chg_info.chrg_present, chg->sgm->state.hiz_en,
paired_ocv, batt_ocv);
pr_info("delta_ocv:%dmV, delta_soc:%d, high_load:%d, low_load:%d, ichg:%duA\n",
delta_ocv, delta_soc, high_load_en, low_load_en, paired_ichg);
}