diff options
| author | Rupesh Kumar <rupesh.kumar@stericsson.com> | 2012-06-19 10:21:24 +0530 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2013-03-07 12:35:39 +0800 |
| commit | 789ca7b46877f29b2aaa94401319c50be35b184f (patch) | |
| tree | 7e4ac3006175ad7c5c2a307a99b086bf0e60a630 /drivers/power/pm2301_charger.c | |
| parent | 4dcdf57773fd45b483fc7613b9e51b89a57d655c (diff) | |
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.c | 50 |
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, ®_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"); - |