summaryrefslogtreecommitdiff
path: root/include/linux/spi/ads7846.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/spi/ads7846.h')
-rw-r--r--include/linux/spi/ads7846.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index adb3dafd33e9..3387e44dfd13 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -5,9 +5,17 @@
*
* 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 */
+ int keep_vref_on:1; /* set to keep vref on for differential
+ * measurements as well */
u16 x_plate_ohms;
u16 y_plate_ohms;
@@ -21,5 +29,9 @@ 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);
};