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-rw-r--r--drivers/power/supply/bq27xxx_battery.c38
-rw-r--r--include/linux/power/bq27xxx_battery.h1
2 files changed, 38 insertions, 1 deletions
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 3f57dd54803a..3b0dbc689d72 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -39,6 +39,7 @@
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/param.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
@@ -390,8 +391,35 @@ static struct {
BQ27XXX_PROP(BQ27421, bq27421_battery_props),
};
+static DEFINE_MUTEX(bq27xxx_list_lock);
+static LIST_HEAD(bq27xxx_battery_devices);
+
+static int poll_interval_param_set(const char *val, const struct kernel_param *kp)
+{
+ struct bq27xxx_device_info *di;
+ int ret;
+
+ ret = param_set_uint(val, kp);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&bq27xxx_list_lock);
+ list_for_each_entry(di, &bq27xxx_battery_devices, list) {
+ cancel_delayed_work_sync(&di->work);
+ schedule_delayed_work(&di->work, 0);
+ }
+ mutex_unlock(&bq27xxx_list_lock);
+
+ return ret;
+}
+
+static const struct kernel_param_ops param_ops_poll_interval = {
+ .get = param_get_uint,
+ .set = poll_interval_param_set,
+};
+
static unsigned int poll_interval = 360;
-module_param(poll_interval, uint, 0644);
+module_param_cb(poll_interval, &param_ops_poll_interval, &poll_interval, 0644);
MODULE_PARM_DESC(poll_interval,
"battery poll interval in seconds - 0 disables polling");
@@ -972,6 +1000,10 @@ int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
bq27xxx_battery_update(di);
+ mutex_lock(&bq27xxx_list_lock);
+ list_add(&di->list, &bq27xxx_battery_devices);
+ mutex_unlock(&bq27xxx_list_lock);
+
return 0;
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_setup);
@@ -990,6 +1022,10 @@ void bq27xxx_battery_teardown(struct bq27xxx_device_info *di)
power_supply_unregister(di->bat);
+ mutex_lock(&bq27xxx_list_lock);
+ list_del(&di->list);
+ mutex_unlock(&bq27xxx_list_lock);
+
mutex_destroy(&di->lock);
}
EXPORT_SYMBOL_GPL(bq27xxx_battery_teardown);
diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
index b50c0492629d..e30deb046156 100644
--- a/include/linux/power/bq27xxx_battery.h
+++ b/include/linux/power/bq27xxx_battery.h
@@ -58,6 +58,7 @@ struct bq27xxx_device_info {
unsigned long last_update;
struct delayed_work work;
struct power_supply *bat;
+ struct list_head list;
struct mutex lock;
u8 *regs;
};