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power: bq27xxx_battery: Add interrupt handling support

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Some devices have a pin that can generate an interrupt when
the battery's status changes. Add an interrupt handler to
read the new battery status.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Andrew F. Davis 2015-09-22 14:35:11 -05:00 • committed by Sebastian Reichel
parent 74aab849f3
commit 8807feb91b
1 changed files with 23 additions and 0 deletions
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23
drivers/power/bq27xxx_battery.c
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@ -48,6 +48,7 @@
#include <linux/idr.h> #include <linux/idr.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/interrupt.h>
#include <asm/unaligned.h> #include <asm/unaligned.h>
#include <linux/power/bq27xxx_battery.h> #include <linux/power/bq27xxx_battery.h>
@ -761,6 +762,15 @@ static void bq27xxx_battery_update(struct bq27xxx_device_info *di)
di->last_update = jiffies; di->last_update = jiffies;
} }
static irqreturn_t bq27xxx_battery_irq_handler_thread(int irq, void *data)
{
struct bq27xxx_device_info *di = data;
bq27xxx_battery_update(di);
return IRQ_HANDLED;
}
static void bq27xxx_battery_poll(struct work_struct *work) static void bq27xxx_battery_poll(struct work_struct *work)
{ {
struct bq27xxx_device_info *di = struct bq27xxx_device_info *di =
@ -1128,6 +1138,19 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
i2c_set_clientdata(client, di); i2c_set_clientdata(client, di);
if (client->irq) {
retval = devm_request_threaded_irq(&client->dev, client->irq,
NULL, bq27xxx_battery_irq_handler_thread,
IRQF_ONESHOT,
name, di);
if (retval) {
dev_err(&client->dev,
"Unable to register IRQ %d error %d\n",
client->irq, retval);
return retval;
}
}
return 0; return 0;
batt_failed: batt_failed: