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Input: tsc2007 - add open and close methods

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This will ensure that the device delivers input events only when there
are users.

Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2011-08-25 01:05:46 -07:00
parent 377dc5538c
commit d3654d7ef3
1 changed files with 38 additions and 8 deletions
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46
drivers/input/touchscreen/tsc2007.c
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@ -237,12 +237,40 @@ static irqreturn_t tsc2007_hard_irq(int irq, void *handle)
return IRQ_HANDLED;
}
static void tsc2007_free_irq(struct tsc2007 *ts)
static void tsc2007_stop(struct tsc2007 *ts)
{
ts->stopped = true;
mb();
wake_up(&ts->wait);
free_irq(ts->irq, ts);
disable_irq(ts->irq);
}
static int tsc2007_open(struct input_dev *input_dev)
{
struct tsc2007 *ts = input_get_drvdata(input_dev);
int err;
ts->stopped = false;
mb();
enable_irq(ts->irq);
/* Prepare for touch readings - power down ADC and enable PENIRQ */
err = tsc2007_xfer(ts, PWRDOWN);
if (err < 0) {
tsc2007_stop(ts);
return err;
}
return 0;
}
static void tsc2007_close(struct input_dev *input_dev)
{
struct tsc2007 *ts = input_get_drvdata(input_dev);
tsc2007_stop(ts);
}
static int __devinit tsc2007_probe(struct i2c_client *client,
@ -289,6 +317,11 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
input_dev->phys = ts->phys;
input_dev->id.bustype = BUS_I2C;
input_dev->open = tsc2007_open;
input_dev->close = tsc2007_close;
input_set_drvdata(input_dev, ts);
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
@ -307,10 +340,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
goto err_free_mem;
}
/* Prepare for touch readings - power down ADC and enable PENIRQ */
err = tsc2007_xfer(ts, PWRDOWN);
if (err < 0)
goto err_free_irq;
tsc2007_stop(ts);
err = input_register_device(input_dev);
if (err)
@ -321,7 +351,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
return 0;
err_free_irq:
tsc2007_free_irq(ts);
free_irq(ts->irq, ts);
if (pdata->exit_platform_hw)
pdata->exit_platform_hw();
err_free_mem:
@ -335,7 +365,7 @@ static int __devexit tsc2007_remove(struct i2c_client *client)
struct tsc2007 *ts = i2c_get_clientdata(client);
struct tsc2007_platform_data *pdata = client->dev.platform_data;
tsc2007_free_irq(ts);
free_irq(ts->irq, ts);
if (pdata->exit_platform_hw)
pdata->exit_platform_hw();