diff options
| author | Imre Deak <imre.deak@solidboot.com> | 2007-01-18 00:44:41 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2007-01-18 00:44:41 -0500 |
| commit | da970e69efb9fd0be0c23ace5bde42d4caf17b40 (patch) | |
| tree | 8d415d9ccbf6bbdfa360146c539d8213c794a21f /include/linux/spi | |
| parent | 78a56aab11234e53b7e94e5a255cc3d27ab0a62b (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.h | 10 |
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 @@ * * It's OK if the min/max values are zero. */ +enum ads7846_filter { + ADS7846_FILTER_OK, + ADS7846_FILTER_REPEAT, + ADS7846_FILTER_IGNORE, +}; + struct ads7846_platform_data { u16 model; /* 7843, 7845, 7846. */ u16 vref_delay_usecs; /* 0 for external vref; etc */ @@ -21,5 +27,9 @@ struct ads7846_platform_data { u16 debounce_rep; /* additional consecutive good readings * required after the first two */ int (*get_pendown_state)(void); + int (*filter_init) (struct ads7846_platform_data *pdata, + void **filter_data); + int (*filter) (void *filter_data, int data_idx, int *val); + void (*filter_cleanup)(void *filter_data); }; |