test-touchscreen-median.patch

Signed-off-by: Andy Green <andy@openmoko.com>

2 files changed, 35 insertions, 14 deletions

diff --git a/arch/arm/mach-s3c2410/include/mach/ts.h b/arch/arm/mach-s3c2410/include/mach/ts.h
index 6fa75f6c0ab..ab4433f10bd 100644
--- a/arch/arm/mach-s3c2410/include/mach/ts.h
+++ b/arch/arm/mach-s3c2410/include/mach/ts.h
@@ -16,12 +16,17 @@
 #ifndef __ASM_ARM_TS_H
 #define __ASM_ARM_TS_H
 
+#include <linux/ts_filter.h>
+
 struct s3c2410_ts_mach_info {
-	int             delay;
-	int             presc;
-	int             oversampling_shift;
-	int		excursion_filter_len_bits;
-	int		reject_threshold_vs_avg;
+        int delay;
+        int presc;
+        /* array of pointers to filter APIs we want to use, in order
+         * ends on first NULL, all NULL is OK
+         */
+        struct ts_filter_api *filter_sequence[MAX_TS_FILTER_CHAIN];
+        /* array of configuration ints, one for each filter above */
+        void *filter_config[MAX_TS_FILTER_CHAIN];
 };
 
 void set_s3c2410ts_info(struct s3c2410_ts_mach_info *hard_s3c2410ts_info);
diff --git a/arch/arm/mach-s3c2410/mach-gta01.c b/arch/arm/mach-s3c2410/mach-gta01.c
index 47377bd3da0..e718a810f42 100644
--- a/arch/arm/mach-s3c2410/mach-gta01.c
+++ b/arch/arm/mach-s3c2410/mach-gta01.c
@@ -505,19 +505,35 @@ static struct s3c2410_udc_mach_info gta01_udc_cfg = {
 	.vbus_draw	= gta01_udc_vbus_draw,
 };
 
+
+/* touchscreen configuration */
+
+static struct ts_filter_median_configuration gta01_ts_median_config = {
+	.extent = 31,
+	.decimation_below = 24,
+	.decimation_threshold = 8 * 3,
+	.decimation_above = 12,
+};
+
+static struct ts_filter_mean_configuration gta01_ts_mean_config = {
+	.bits_filter_length = 5,
+	.averaging_threshold = 12
+};
+
 static struct s3c2410_ts_mach_info gta01_ts_cfg = {
 	.delay = 10000,
-	.presc = 50000000 / 1000000, /* 50 MHz PCLK / 1MHz */
-	/* simple averaging, 2^n samples */
-	.oversampling_shift = 5,
-	/* averaging filter length, 2^n */
-	.excursion_filter_len_bits = 5,
-	/* flagged for beauty contest on next sample if differs from
-	 * average more than this
-	 */
-	.reject_threshold_vs_avg = 2,
+	.presc = 0xff, /* slow as we can go */
+	.filter_sequence = {
+		[0] = &ts_filter_median_api,
+		[1] = &ts_filter_mean_api,
+	},
+	.filter_config = {
+		[0] = &gta01_ts_median_config,
+		[1] = &gta01_ts_mean_config,
+	},
 };
 
+
 /* SPI */
 
 static void gta01_jbt6k74_reset(int devidx, int level)