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authorRupesh Kumar <rupesh.kumar@stericsson.com>2012-06-19 10:21:24 +0530
committerLee Jones <lee.jones@linaro.org>2013-03-07 12:35:39 +0800
commit789ca7b46877f29b2aaa94401319c50be35b184f (patch)
tree7e4ac3006175ad7c5c2a307a99b086bf0e60a630 /drivers/power/pm2301_charger.c
parent4dcdf57773fd45b483fc7613b9e51b89a57d655c (diff)
downloadvexpress-lsk-789ca7b46877f29b2aaa94401319c50be35b184f.tar.gz
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>
Diffstat (limited to 'drivers/power/pm2301_charger.c')
-rw-r--r--drivers/power/pm2301_charger.c50
1 files changed, 36 insertions, 14 deletions
diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index b2f2d4188da..b560fa5ac4e 100644
--- a/drivers/power/pm2301_charger.c
+++ b/drivers/power/pm2301_charger.c
@@ -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");
-