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authorImre Deak <imre.deak@solidboot.com>2007-01-18 00:44:41 -0500
committerDmitry Torokhov <dtor@insightbb.com>2007-01-18 00:44:41 -0500
commitda970e69efb9fd0be0c23ace5bde42d4caf17b40 (patch)
tree8d415d9ccbf6bbdfa360146c539d8213c794a21f /include/linux/spi
parent78a56aab11234e53b7e94e5a255cc3d27ab0a62b (diff)
Input: ads7846 - pluggable filtering logic
Some LCDs like the LS041Y3 require a customized filtering logic for reliable readings, so make the filtering function replacable through platform specific hooks. Signed-off-by: Imre Deak <imre.deak@solidboot.com> Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/ads7846.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index adb3dafd33e9..1663f940ca11 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -5,6 +5,12 @@
5 * 5 *
6 * It's OK if the min/max values are zero. 6 * It's OK if the min/max values are zero.
7 */ 7 */
8enum ads7846_filter {
9 ADS7846_FILTER_OK,
10 ADS7846_FILTER_REPEAT,
11 ADS7846_FILTER_IGNORE,
12};
13
8struct ads7846_platform_data { 14struct ads7846_platform_data {
9 u16 model; /* 7843, 7845, 7846. */ 15 u16 model; /* 7843, 7845, 7846. */
10 u16 vref_delay_usecs; /* 0 for external vref; etc */ 16 u16 vref_delay_usecs; /* 0 for external vref; etc */
@@ -21,5 +27,9 @@ struct ads7846_platform_data {
21 u16 debounce_rep; /* additional consecutive good readings 27 u16 debounce_rep; /* additional consecutive good readings
22 * required after the first two */ 28 * required after the first two */
23 int (*get_pendown_state)(void); 29 int (*get_pendown_state)(void);
30 int (*filter_init) (struct ads7846_platform_data *pdata,
31 void **filter_data);
32 int (*filter) (void *filter_data, int data_idx, int *val);
33 void (*filter_cleanup)(void *filter_data);
24}; 34};
25 35