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

Added support for main charger over voltage protection.

Signed-off-by: Rupesh Kumar <rupesh.kumar@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>
Tested-by: Michel JAOUEN <michel.jaouen@stericsson.com>
This commit is contained in:
Rupesh Kumar 2012-06-19 10:21:24 +05:30 committed by Lee Jones
parent 4dcdf57773
commit 789ca7b468
2 changed files with 37 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/power/pm2301_charger.c
View File

@ -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;
dev_err(pm2->dev, "Overvoltage detected\n");
pm2->flags.ovv = true;
power_supply_changed(&pm2->ac_chg.psy);
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);
}
/* Schedule a new HW failure check */
queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0);
out:
return ret;
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
drivers/power/pm2301_charger.h
View File

@ -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;
};