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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>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* Atmel maXTouch Touchscreen driver
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*
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* Copyright (C) 2010 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __LINUX_ATMEL_MXT_TS_H
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#define __LINUX_ATMEL_MXT_TS_H
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#include <linux/types.h>
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/* For key_map array */
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#define MXT_NUM_GPIO 4
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/* Orient */
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#define MXT_NORMAL 0x0
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#define MXT_DIAGONAL 0x1
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#define MXT_HORIZONTAL_FLIP 0x2
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#define MXT_ROTATED_90_COUNTER 0x3
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#define MXT_VERTICAL_FLIP 0x4
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#define MXT_ROTATED_90 0x5
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#define MXT_ROTATED_180 0x6
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#define MXT_DIAGONAL_COUNTER 0x7
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/* The platform data for the Atmel maXTouch touchscreen driver */
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struct mxt_platform_data {
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const u8 *config;
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size_t config_length;
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unsigned int x_line;
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unsigned int y_line;
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unsigned int x_size;
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unsigned int y_size;
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unsigned int blen;
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unsigned int threshold;
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unsigned int voltage;
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unsigned char orient;
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unsigned long irqflags;
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bool is_tp;
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const unsigned int key_map[MXT_NUM_GPIO];
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};
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#endif /* __LINUX_ATMEL_MXT_TS_H */
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