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Commit 789ca7b4 authored by Rupesh Kumar's avatar Rupesh Kumar Committed by Lee Jones
Browse files

pm2301-charger: Support for over voltage protection on the ab9540



Added support for main charger over voltage protection.

Signed-off-by: default avatarRupesh Kumar <rupesh.kumar@stericsson.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Reviewed-by: default avatarPhilippe LANGLAIS <philippe.langlais@stericsson.com>
Tested-by: default avatarMichel JAOUEN <michel.jaouen@stericsson.com>
parent 4dcdf577
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+36 −14
Original line number Diff line number Diff line
@@ -227,21 +227,14 @@ int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val)

static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val)
{
	int ret = 0;

	pm2->failure_input_ovv++;
	if (pm2->failure_input_ovv < 4) {
		ret = pm2xxx_charging_enable_mngt(pm2);
		goto out;
	} else {
		pm2->failure_input_ovv = 0;
	dev_err(pm2->dev, "Overvoltage detected\n");
	pm2->flags.ovv = true;
	power_supply_changed(&pm2->ac_chg.psy);
	}

out:
	return ret;
	/* Schedule a new HW failure check */
	queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0);

	return 0;
}

static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val)
@@ -630,6 +623,8 @@ static int pm2xxx_charger_ac_get_property(struct power_supply *psy,
			val->intval = POWER_SUPPLY_HEALTH_DEAD;
		else if (pm2->flags.main_thermal_prot)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else if (pm2->flags.ovv)
			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
@@ -860,6 +855,30 @@ static void pm2xxx_charger_ac_work(struct work_struct *work)
	sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
};

static void pm2xxx_charger_check_hw_failure_work(struct work_struct *work)
{
	u8 reg_value;

	struct pm2xxx_charger *pm2 = container_of(work,
		struct pm2xxx_charger, check_hw_failure_work.work);

	if (pm2->flags.ovv) {
		pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &reg_value);

		if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV |
					PM2XXX_INT4_S_ITVPWR2OVV))) {
			pm2->flags.ovv = false;
			power_supply_changed(&pm2->ac_chg.psy);
		}
	}

	/* If we still have a failure, schedule a new check */
	if (pm2->flags.ovv) {
		queue_delayed_work(pm2->charger_wq,
			&pm2->check_hw_failure_work, round_jiffies(HZ));
	}
}

static void pm2xxx_charger_check_main_thermal_prot_work(
	struct work_struct *work)
{
@@ -983,6 +1002,10 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
	INIT_WORK(&pm2->check_main_thermal_prot_work,
		pm2xxx_charger_check_main_thermal_prot_work);

	/* Init work for HW failure check */
	INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work,
		pm2xxx_charger_check_hw_failure_work);

	/*
	 * VDD ADC supply needs to be enabled from this driver when there
	 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
@@ -1123,4 +1146,3 @@ MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
MODULE_ALIAS("platform:pm2xxx-charger");
MODULE_DESCRIPTION("PM2xxx charger management driver");
+1 −0
Original line number Diff line number Diff line
@@ -506,6 +506,7 @@ struct pm2xxx_charger {
	struct delayed_work check_vbat_work;
	struct work_struct ac_work;
	struct work_struct check_main_thermal_prot_work;
	struct delayed_work check_hw_failure_work;
	struct ux500_charger ac_chg;
	struct pm2xxx_charger_event_flags flags;
};