diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-08-25 01:05:46 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-08-26 23:25:14 -0700 |
| commit | d3654d7ef3adad0083525cfb6fe27be62cb83d0d (patch) | |
| tree | 7d9370df7516c190b12ba8c3dbe960363d7efbfe /drivers/input/touchscreen/tsc2007.c | |
| parent | 377dc5538c43052d2ee9bc89577cb07fe18f2520 (diff) | |
Input: tsc2007 - add open and close methods
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>
Diffstat (limited to 'drivers/input/touchscreen/tsc2007.c')
| -rw-r--r-- | drivers/input/touchscreen/tsc2007.c | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index e3aaf50ee8d3..0acca68cc52b 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -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(); |