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Input: ads7846 - add pen_down sysfs attribute

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It's handy for userspace diagnostics to see the pen down status, to
see whether the touchscreen is "stuck" (shortcircuited).

Signed-off-by: Imre Deak <imre.deak@nokia.com>
Signed-off-by: Juha Yrjola <juha.yrjola@nokia.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Imre Deak
2006-04-11 23:41:32 -04:00
committed by Dmitry Torokhov
parent e2aa507a83
commit 438f2a7401
1 changed files with 19 additions and 0 deletions
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19
drivers/input/touchscreen/ads7846.c
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@ -233,6 +233,21 @@ SHOW(temp1)
SHOW(vaux)
SHOW(vbatt)
static int is_pen_down(struct device *dev)
{
struct ads7846 *ts = dev_get_drvdata(dev);
return ts->pendown;
}
static ssize_t ads7846_pen_down_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%u\n", is_pen_down(dev));
}
static DEVICE_ATTR(pen_down, S_IRUGO, ads7846_pen_down_show, NULL);
/*--------------------------------------------------------------------------*/
/*
@ -559,6 +574,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
device_create_file(&spi->dev, &dev_attr_vbatt);
device_create_file(&spi->dev, &dev_attr_vaux);
device_create_file(&spi->dev, &dev_attr_pen_down);
err = input_register_device(input_dev);
if (err)
goto err_free_irq;
@ -582,6 +599,8 @@ static int __devexit ads7846_remove(struct spi_device *spi)
if (ts->irq_disabled)
enable_irq(ts->spi->irq);
device_remove_file(&spi->dev, &dev_attr_pen_down);
if (ts->model == 7846) {
device_remove_file(&spi->dev, &dev_attr_temp0);
device_remove_file(&spi->dev, &dev_attr_temp1);