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authorImre Deak <imre.deak@nokia.com>2006-04-11 23:41:32 -0400
committerDmitry Torokhov <dtor_core@ameritech.net>2006-04-11 23:41:32 -0400
commit438f2a7401ec5d8f85923a7c3e6da444f097a3a1 (patch)
tree831ee631c1fa3809ece325d8ec6892ef94babd84 /drivers/input/touchscreen
parente2aa507a837cbaa376faa3d9f8448ff569d34ccf (diff)
downloadlinux-438f2a7401ec5d8f85923a7c3e6da444f097a3a1.tar.bz2
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: 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>
Diffstat (limited to 'drivers/input/touchscreen')
-rw-r--r--drivers/input/touchscreen/ads7846.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 46d1fec2cfd8..7f384a694d80 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -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);