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authorLiam Breck <liam@networkimprov.net>2017-01-18 09:26:52 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-05-14 14:00:14 +0200
commit4b7dac0a23b7c416b30962362268e8e55da9eaff (patch)
treec786f8eb84239aee67b92567107932a873624601 /drivers/power
parent63e1acc84d28d73107e72482e33dcca152bb5ea4 (diff)
power: supply: bq24190_charger: Call power_supply_changed() for relevant component
commit 2d9fee6a42ea170e4378b3363a7ad385d0e67281 upstream. We wrongly get uevents for bq24190-charger and bq24190-battery on every register change. Fix by checking the association with charger and battery before emitting uevent(s). Fixes: d7bf353fd0aa3 ("bq24190_charger: Add support for TI BQ24190 Battery Charger") Signed-off-by: Liam Breck <kernel@networkimprov.net> Acked-by: Mark Greer <mgreer@animalcreek.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/bq24190_charger.c50
1 files changed, 27 insertions, 23 deletions
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index d0afafd7b1cb..94d282286bfd 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -159,7 +159,6 @@ struct bq24190_dev_info {
unsigned int gpio_int;
unsigned int irq;
struct mutex f_reg_lock;
- bool first_time;
bool charger_health_valid;
bool battery_health_valid;
bool battery_status_valid;
@@ -1197,7 +1196,10 @@ static const struct power_supply_desc bq24190_battery_desc = {
static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
{
struct bq24190_dev_info *bdi = data;
- bool alert_userspace = false;
+ const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
+ const u8 battery_mask_f = BQ24190_REG_F_BAT_FAULT_MASK
+ | BQ24190_REG_F_NTC_FAULT_MASK;
+ bool alert_charger = false, alert_battery = false;
u8 ss_reg = 0, f_reg = 0;
int ret;
@@ -1225,8 +1227,12 @@ static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
ret);
}
+ if ((bdi->ss_reg & battery_mask_ss) != (ss_reg & battery_mask_ss))
+ alert_battery = true;
+ if ((bdi->ss_reg & ~battery_mask_ss) != (ss_reg & ~battery_mask_ss))
+ alert_charger = true;
+
bdi->ss_reg = ss_reg;
- alert_userspace = true;
}
mutex_lock(&bdi->f_reg_lock);
@@ -1239,33 +1245,23 @@ static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
}
if (f_reg != bdi->f_reg) {
+ if ((bdi->f_reg & battery_mask_f) != (f_reg & battery_mask_f))
+ alert_battery = true;
+ if ((bdi->f_reg & ~battery_mask_f) != (f_reg & ~battery_mask_f))
+ alert_charger = true;
+
bdi->f_reg = f_reg;
bdi->charger_health_valid = true;
bdi->battery_health_valid = true;
bdi->battery_status_valid = true;
-
- alert_userspace = true;
}
mutex_unlock(&bdi->f_reg_lock);
- /*
- * Sometimes bq24190 gives a steady trickle of interrupts even
- * though the watchdog timer is turned off and neither the STATUS
- * nor FAULT registers have changed. Weed out these sprurious
- * interrupts so userspace isn't alerted for no reason.
- * In addition, the chip always generates an interrupt after
- * register reset so we should ignore that one (the very first
- * interrupt received).
- */
- if (alert_userspace) {
- if (!bdi->first_time) {
- power_supply_changed(bdi->charger);
- power_supply_changed(bdi->battery);
- } else {
- bdi->first_time = false;
- }
- }
+ if (alert_charger)
+ power_supply_changed(bdi->charger);
+ if (alert_battery)
+ power_supply_changed(bdi->battery);
out:
pm_runtime_put_sync(bdi->dev);
@@ -1300,6 +1296,10 @@ static int bq24190_hw_init(struct bq24190_dev_info *bdi)
goto out;
ret = bq24190_set_mode_host(bdi);
+ if (ret < 0)
+ goto out;
+
+ ret = bq24190_read(bdi, BQ24190_REG_SS, &bdi->ss_reg);
out:
pm_runtime_put_sync(bdi->dev);
return ret;
@@ -1375,7 +1375,8 @@ static int bq24190_probe(struct i2c_client *client,
bdi->model = id->driver_data;
strncpy(bdi->model_name, id->name, I2C_NAME_SIZE);
mutex_init(&bdi->f_reg_lock);
- bdi->first_time = true;
+ bdi->f_reg = 0;
+ bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */
bdi->charger_health_valid = false;
bdi->battery_health_valid = false;
bdi->battery_status_valid = false;
@@ -1489,6 +1490,8 @@ static int bq24190_pm_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
+ bdi->f_reg = 0;
+ bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */
bdi->charger_health_valid = false;
bdi->battery_health_valid = false;
bdi->battery_status_valid = false;
@@ -1496,6 +1499,7 @@ static int bq24190_pm_resume(struct device *dev)
pm_runtime_get_sync(bdi->dev);
bq24190_register_reset(bdi);
bq24190_set_mode_host(bdi);
+ bq24190_read(bdi, BQ24190_REG_SS, &bdi->ss_reg);
pm_runtime_put_sync(bdi->dev);
/* Things may have changed while suspended so alert upper layer */