input: atmel_mxt_ts: Support runtime selection of config data
Add support for dynamic configuration data update if the target can
support more than one Atmel chip. Platform data contains an array of
supported config data along with family ID, variant ID and firmware
version. Driver searches for matching family ID, variant ID and
firmware version, and uses the corresponding config data to program.
Change-Id: I684da4bdef56a3445acab3bb8fe47dd5279bebe5
Signed-off-by: Jing Lin <jinglin@codeaurora.org>
diff --git a/include/linux/i2c/atmel_mxt_ts.h b/include/linux/i2c/atmel_mxt_ts.h
index 9aa557a..7ae8342 100644
--- a/include/linux/i2c/atmel_mxt_ts.h
+++ b/include/linux/i2c/atmel_mxt_ts.h
@@ -29,10 +29,20 @@
/* MXT_TOUCH_KEYARRAY_T15 */
#define MXT_KEYARRAY_MAX_KEYS 32
-/* The platform data for the Atmel maXTouch touchscreen driver */
-struct mxt_platform_data {
+/* Config data for a given maXTouch controller with a specific firmware */
+struct mxt_config_info {
const u8 *config;
size_t config_length;
+ u8 family_id;
+ u8 variant_id;
+ u8 version;
+ u8 build;
+};
+
+/* The platform data for the Atmel maXTouch touchscreen driver */
+struct mxt_platform_data {
+ const struct mxt_config_info *config_array;
+ size_t config_array_size;
unsigned int x_size;
unsigned int y_size;