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authorMichael Hennerich <michael.hennerich@analog.com>2010-03-09 20:38:47 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2010-03-09 22:13:30 -0800
commit4eb6f91b95e7618eae0103b6cba7c7f01f9d40f3 (patch)
treea668ba8445ba7cee4ef243684de51ac7e79c91ff /drivers/input
parent06a09124b5ec65f81df66c56695d9a9ae04a0114 (diff)
Input: ad7877 - increase pen up imeout
The time interval between consecutive interrupts depends on a number of tunables: first_conversion_delay, acquisition_time, averaging and foremost the pen_down_acc_interval. Since the mod_timer() action for the PEN UP event happens in the spi_async() callback function, latencies incurred by the spi bus drivers also need to be taken into account. So all in all, give the PEN UP event a bit more wiggle room and increase timeout to 100ms. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/ad7877.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c
index eb83939c705..e019d53d1ab 100644
--- a/drivers/input/touchscreen/ad7877.c
+++ b/drivers/input/touchscreen/ad7877.c
@@ -46,7 +46,7 @@
#include <linux/spi/ad7877.h>
#include <asm/irq.h>
-#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50)
+#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(100)
#define MAX_SPI_FREQ_HZ 20000000
#define MAX_12BIT ((1<<12)-1)