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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

drivers/power/pm2301_charger.c

+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");

drivers/power/pm2301_charger.h

+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;

};