AcoSail/kernel_optimize_test
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Input: max7359 - use threaded IRQs

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Convert max7359 driver to use IRQ threading instead of using
workqueue.

Tested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2009-09-21 22:17:57 -07:00
parent 0baf81ba15
commit 44ca397bcf
1 changed files with 13 additions and 35 deletions
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48
drivers/input/keyboard/max7359_keypad.c
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@ -58,12 +58,8 @@ struct max7359_keypad {
/* matrix key code map */
unsigned short keycodes[MAX7359_MAX_KEY_NUM];
struct work_struct work;
struct input_dev *input_dev;
struct i2c_client *client;
u32 irq;
};
static int max7359_write_reg(struct i2c_client *client, u8 reg, u8 val)
@ -106,10 +102,10 @@ static void max7359_build_keycode(struct max7359_keypad *keypad,
__clear_bit(KEY_RESERVED, input_dev->keybit);
}
static void max7359_worker(struct work_struct *work)
/* runs in an IRQ thread -- can (and will!) sleep */
static irqreturn_t max7359_interrupt(int irq, void *dev_id)
{
struct max7359_keypad *keypad =
container_of(work, struct max7359_keypad, work);
struct max7359_keypad *keypad = dev_id;
struct input_dev *input_dev = keypad->input_dev;
int val, row, col, release, code;
@ -120,25 +116,13 @@ static void max7359_worker(struct work_struct *work)
code = MATRIX_SCAN_CODE(row, col, MAX7359_ROW_SHIFT);
dev_dbg(&keypad->client->dev,
"key[%d:%d] %s\n", row, col, release ? "release" : "press");
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, keypad->keycodes[code], !release);
input_sync(input_dev);
enable_irq(keypad->irq);
dev_dbg(&keypad->client->dev, "key[%d:%d] %s\n", row, col,
(release ? "release" : "press"));
}
static irqreturn_t max7359_interrupt(int irq, void *dev_id)
{
struct max7359_keypad *keypad = dev_id;
if (!work_pending(&keypad->work)) {
disable_irq_nosync(keypad->irq);
schedule_work(&keypad->work);
}
return IRQ_HANDLED;
}
@ -226,8 +210,6 @@ static int __devinit max7359_probe(struct i2c_client *client,
keypad->client = client;
keypad->input_dev = input_dev;
keypad->irq = client->irq;
INIT_WORK(&keypad->work, max7359_worker);
input_dev->name = client->name;
input_dev->id.bustype = BUS_I2C;
@ -245,8 +227,9 @@ static int __devinit max7359_probe(struct i2c_client *client,
max7359_build_keycode(keypad, keymap_data);
error = request_irq(keypad->irq, max7359_interrupt,
IRQF_TRIGGER_LOW, client->name, keypad);
error = request_threaded_irq(client->irq, NULL, max7359_interrupt,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
client->name, keypad);
if (error) {
dev_err(&client->dev, "failed to register interrupt\n");
goto failed_free_mem;
@ -268,7 +251,7 @@ static int __devinit max7359_probe(struct i2c_client *client,
return 0;
failed_free_irq:
free_irq(keypad->irq, keypad);
free_irq(client->irq, keypad);
failed_free_mem:
input_free_device(input_dev);
kfree(keypad);
@ -279,9 +262,8 @@ static int __devexit max7359_remove(struct i2c_client *client)
{
struct max7359_keypad *keypad = i2c_get_clientdata(client);
cancel_work_sync(&keypad->work);
free_irq(client->irq, keypad);
input_unregister_device(keypad->input_dev);
free_irq(keypad->irq, keypad);
i2c_set_clientdata(client, NULL);
kfree(keypad);
@ -291,22 +273,18 @@ static int __devexit max7359_remove(struct i2c_client *client)
#ifdef CONFIG_PM
static int max7359_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct max7359_keypad *keypad = i2c_get_clientdata(client);
max7359_fall_deepsleep(client);
if (device_may_wakeup(&client->dev))
enable_irq_wake(keypad->irq);
enable_irq_wake(client->irq);
return 0;
}
static int max7359_resume(struct i2c_client *client)
{
struct max7359_keypad *keypad = i2c_get_clientdata(client);
if (device_may_wakeup(&client->dev))
disable_irq_wake(keypad->irq);
disable_irq_wake(client->irq);
/* Restore the default setting */
max7359_take_catnap(client);