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Commit 438f2a74 authored by Imre Deak's avatar Imre Deak Committed by Dmitry Torokhov
Browse files

Input: ads7846 - add pen_down sysfs attribute 



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

Signed-off-by: default avatarImre Deak <imre.deak@nokia.com>
Signed-off-by: default avatarJuha Yrjola <juha.yrjola@nokia.com>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent e2aa507a

drivers/input/touchscreen/ads7846.c

+19 −0
Original line number Diff line number Diff line
@@ -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);