GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Input: atmel_mxt_ts - Support for touchpad variant

Browse source 
This same driver can be used by atmel based touchscreens and touchpads
(buttonpads). Platform data may specify a device is a touchpad
using the is_tp flag.

This will cause the driver to perform some touchpad specific
initializations, such as:
  * register input device name "Atmel maXTouch Touchpad" instead of
  Touchscreen.
  * register BTN_LEFT & BTN_TOOL_* event types.
  * register axis resolution (as a fixed constant, for now)
  * register BUTTONPAD property
  * process GPIO buttons using reportid T19

Input event GPIO mapping is done by the platform data key_map array.

key_map[x] should contain the KEY or BTN code to send when processing
GPIOx from T19. To specify a GPIO as not an input source, populate
with KEY_RESERVED, or 0.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daniel Kurtz 2013-03-07 19:43:33 -08:00 • committed by Linus Torvalds
parent 67a865a40b
commit 22dfab7fd7
2 changed files with 67 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/linux/i2c/atmel_mxt_ts.h
View file

@ -15,6 +15,9 @@
#include <linux/types.h>
/* For key_map array */
#define MXT_NUM_GPIO 4
/* Orient */
#define MXT_NORMAL 0x0
#define MXT_DIAGONAL 0x1
@ -39,6 +42,8 @@ struct mxt_platform_data {
unsigned int voltage;
unsigned char orient;
unsigned long irqflags;
bool is_tp;
const unsigned int key_map[MXT_NUM_GPIO];
};
#endif /* __LINUX_ATMEL_MXT_TS_H */