[PATCH] Adapt last Touchscreen Changes from GTA02 to GTA01

[Jose Luis Perez Diez]

Pardon me if I am too verbose but this is my first opportunity to send a patch.

I was wishing to try andy-tracking kernels on GTA01 long ago but It
was  FOSDEM and recent threads on the lists asking for GTA01 that made
me do it.

When I participated on the thread
http://n2.nabble.com/empiezo-a-amargarme-con-los-kernels-necesito-consejo-td2347206.html
 in the Spanish mailing list asking what kernel to use with which
distribution, I responded that only FSO based supported 2.6.28 and
upwards. I could not resist to brag  that I tested 2.6.29 on GTA01 but
only with kexec ( it is possible that my wording was more ambiguous on
the thread).

Nelson Asked if I had problems booting it with u-boot. I tried and was
successful but this time I played a Little with the interface and vala
term and noticed that the on screen keyboard was changing the key
pressed.

Using http://svn.openmoko.org/developers/tick/touchtest/touch_test.py
shown that most of the Up and sometimes the previous Move to where
landing on ([290..310],575).

Revising the code shown that the some of the filters and the option to
disable them were missing on mach-gta01.c.

I have tested the kernel with the patch applied with the filters
disabled and also with them enabled. When the filters are active I
still receive  some misplaced up events but much less (the raster
terminal keyboard is usable).


Signed-off-by:Jose Luis Perez Diez <perezd...@gmail.com>
---
 arch/arm/mach-s3c2410/mach-gta01.c |   38 ++++++++++++++++++++++++++++++++---
 1 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-s3c2410/mach-gta01.c
b/arch/arm/mach-s3c2410/mach-gta01.c
index 6eb8eb3..d424211 100644
--- a/arch/arm/mach-s3c2410/mach-gta01.c
+++ b/arch/arm/mach-s3c2410/mach-gta01.c
@@ -88,8 +88,13 @@

 #include <linux/jbt6k74.h>

+#ifdef CONFIG_TOUCHSCREEN_FILTER
+#include <../drivers/input/touchscreen/ts_filter_linear.h>
 #include <../drivers/input/touchscreen/ts_filter_mean.h>
 #include <../drivers/input/touchscreen/ts_filter_median.h>
+#include <../drivers/input/touchscreen/ts_filter_group.h>
+#endif
+

 static struct map_desc gta01_iodesc[] __initdata = {
        {
@@ -698,6 +703,19 @@ static struct s3c2410_udc_mach_info gta01_udc_cfg = {


 /* touchscreen configuration */
+#ifdef CONFIG_TOUCHSCREEN_FILTER
+static struct ts_filter_linear_configuration gta01_ts_linear_config = {
+       .constants = {1, 0, 0, 0, 1, 0, 1},     /* don't modify coords */
+       .coord0 = 0,
+       .coord1 = 1,
+};
+
+static struct ts_filter_group_configuration gta01_ts_group_config = {
+       .extent = 12,
+       .close_enough = 10,
+       .threshold = 6,         /* at least half of the points in a group */
+       .attempts = 10,
+};

 static struct ts_filter_median_configuration gta01_ts_median_config = {
        .extent = 31,
@@ -715,14 +733,26 @@ static struct s3c2410_ts_mach_info gta01_ts_cfg = {
        .delay = 10000,
        .presc = 0xff, /* slow as we can go */
        .filter_sequence = {
-               [0] = &ts_filter_median_api,
-               [1] = &ts_filter_mean_api,
+               [0] = &ts_filter_group_api,
+               [1] = &ts_filter_median_api,
+               [2] = &ts_filter_mean_api,
+               [3] = &ts_filter_linear_api,
        },
        .filter_config = {
-               [0] = &gta01_ts_median_config,
-               [1] = &gta01_ts_mean_config,
+               [0] = &gta01_ts_group_config,
+               [1] = &gta01_ts_median_config,
+               [2] = &gta01_ts_mean_config,
+               [3] = &gta01_ts_linear_config,
        },
 };
+#else /* !CONFIG_TOUCHSCREEN_FILTER */
+static struct s3c2410_ts_mach_info gta01_ts_cfg = {
+       .delay = 10000,
+       .presc = 0xff, /* slow as we can go */
+       .filter_sequence = { NULL },
+       .filter_config = { NULL },
+};
+#endif


 /* SPI */