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power: supply: bq27xxx_battery: allow kernel poll_interval parameter runtime update 

Fix issue with poll_interval being not updated till the previous
interval expired.

Cc: Tony Lindgren <tony@atomide.com>
Cc: Liam Breck <liam@networkimprov.net>
Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Matt Ranostay 2016-09-19 20:43:02 -07:00 committed by Sebastian Reichel
parent 389958bb6b
commit 1d72706f04
2 changed files with 38 additions and 1 deletions
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38
drivers/power/supply/bq27xxx_battery.c
View File

@ -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);

1
include/linux/power/bq27xxx_battery.h
View File

@ -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;
};