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support empty vbat shutdown with charger

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In order to avoid battery over discharging when charger attached
in some cases with high system load or charging disabled in factory
mode.

Change-Id: If323b2a5c558c944ba85a33188235c58909b6ada
Signed-off-by: Yonghua Yan <yanyh2@motorola.com>
Reviewed-on: https://gerrit.mot.com/2330746
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 2022-07-12 16:59:38 +08:00
commit c6c43063cf
1 changed files with 27 additions and 0 deletions
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27
drivers/power/mmi_charger/mmi_charger.c
View file

@ -147,6 +147,8 @@ struct mmi_charger_profile {
int noffc_chrg_iterm;
int noffc_max_fv_mv;
int shutdown_empty_vbat_mv;
int fg_iterm;
int chrg_iterm;
int max_fv_mv;
@ -250,6 +252,8 @@ struct mmi_charger_chip {
struct mmi_vote suspend_charger_vote;
struct mmi_vote disable_charging_vote;
uint32_t factory_kill_debounce_ms;
bool empty_vbat_shutdown_triggered;
};
static int mmi_vote(struct mmi_vote *vote, const char *voter,
@ -942,6 +946,11 @@ static int mmi_get_charger_profile(struct mmi_charger_chip *chip,
}
node = charger->driver->dev->of_node;
rc = of_property_read_u32(node, "mmi,shutdown-empty-vbat-mv",
&charger->profile.shutdown_empty_vbat_mv);
if (rc)
charger->profile.shutdown_empty_vbat_mv = -EINVAL;
rc = of_property_read_u32(node, "mmi,chrg-iterm-ma",
&charger->profile.chrg_iterm);
if (rc)
@ -1416,6 +1425,15 @@ static void mmi_update_charger_status(struct mmi_charger_chip *chip,
struct mmi_charger_info *chg_info = &charger->chg_info;
struct mmi_charger_cfg *cfg = &charger->cfg;
if (profile->shutdown_empty_vbat_mv > 0 &&
profile->shutdown_empty_vbat_mv >= batt_info->batt_mv) {
mmi_err(chip, "[C:%s]: trigger shutdown, vbat=%d, empty_vbat=%d\n",
charger->driver->name,
batt_info->batt_mv,
profile->shutdown_empty_vbat_mv);
chip->empty_vbat_shutdown_triggered = true;
}
if (chip->enable_charging_limit && chip->factory_version) {
charging_limit_modes = status->charging_limit_modes;
if ((charging_limit_modes != CHARGING_LIMIT_RUN)
@ -2157,6 +2175,15 @@ static void mmi_charger_heartbeat_work(struct work_struct *work)
}
}
if (chip->empty_vbat_shutdown_triggered) {
mmi_err(chip, "shutdown for empty battery voltage\n");
#if (KERNEL_VERSION(5, 10, 0) > LINUX_VERSION_CODE) || defined(MMI_GKI_API_ALLOWANCE)
orderly_poweroff(true);
#else
kernel_power_off();
#endif
}
chip->suspended = 0;
if (chip->factory_mode)