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power: qpnp-smbcharger-mmi: Add Dual Low Voltage Shutdown

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Add a check against both batteries in a dual configuration
for a low voltage condition.  This will drive the SOC to 0% so that
the System Voltage does not get too low.

Change-Id: I70353eeef6b12b25e2d48b181efe00327d1dedb1
Signed-off-by: Kenny Kessler <kenny.kessler@motorola.com>
Reviewed-on: https://gerrit.mot.com/1322360
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Kenneth Kessler <kennykessler@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Kenny Kessler 2019-03-18 19:25:51 -05:00 • committed by Kenneth Kessler
commit cb24c8041a
1 changed files with 19 additions and 1 deletions
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20
drivers/power/qpnp-smbcharger-mmi/qpnp-smbcharger-mmi.c
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@ -64,6 +64,8 @@ enum {
USBIN_ADAPTER_ALLOW_5V_TO_12V = 12,
};
#define LOW_BATT_MV 3300
#define SHUT_BATT_MV 3100
#define REV_BST_THRESH 4700
#define REV_BST_DROP 150
#define REV_BST_BULK_DROP 100
@ -265,6 +267,7 @@ struct smb_mmi_charger {
int age;
int cycles;
int soc_cycles_start;
bool shut_batt;
};
#define CHGR_FAST_CHARGE_CURRENT_CFG_REG (CHGR_BASE + 0x61)
@ -1967,6 +1970,15 @@ vote_now:
vote(chg->fcc_votable, MMI_HB_VOTER,
true, (target_fcc >= 0) ? (target_fcc * 1000) : 0);
if (!stat->charger_present &&
(chg_stat_main.batt_mv <= LOW_BATT_MV) &&
(chg_stat_flip.batt_mv <= LOW_BATT_MV)) {
if ((chg_stat_main.batt_mv <= SHUT_BATT_MV) ||
(chg_stat_flip.batt_mv <= SHUT_BATT_MV))
chg->shut_batt = true;
} else
chg->shut_batt = false;
if (sm_update)
pr_info("SMBMMI:"
"IMPOSED: FV = %d, CDIS = %d, FCC = %d, USBICL = %d\n",
@ -2428,7 +2440,7 @@ static void mmi_heartbeat_work(struct work_struct *work)
report_cap += flip_cap * flip_cap_full;
report_cap /= main_cap_full + flip_cap_full;
if (report_cap < 0)
if (chip->shut_batt || (report_cap < 0))
report_cap = 0;
else if (report_cap > 100)
report_cap = 100;
@ -2485,6 +2497,11 @@ static void mmi_heartbeat_work(struct work_struct *work)
/* Dual Step and Thermal Charging */
hb_resch_time = mmi_dual_charge_control(chip, &chg_stat);
/* Check to see if Voltage is shutdown */
if (chip->shut_batt)
chip->last_reported_soc = 0;
pres_chrg_step = chip->sm_param[BASE_BATT].pres_chrg_step;
if ((prev_chrg_step == STEP_NONE) &&
@ -3201,6 +3218,7 @@ static int smb_mmi_probe(struct platform_device *pdev)
chip->age = 100;
chip->cycles = 0;
chip->shut_batt = false;
chip->soc_cycles_start = EMPTY_CYCLES;
chip->last_reported_soc = -1;
chip->last_reported_status = -1;