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/*
* arch/arm/mach-tegra/board-touch-atmel_maxtouch.c
*
* Copyright (c) 2011, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c/atmel_maxtouch.h>
#if defined (CONFIG_MACH_CARDHU)
#include "board-cardhu.h"
#endif
#if defined (CONFIG_MACH_TEGRA_ENTERPRISE)
#include "board-enterprise.h"
#endif
#if defined (CONFIG_MACH_VENTANA)
#include "board-ventana.h"
#endif
#include "gpio-names.h"
#include "touch.h"
/* Atmel MaxTouch touchscreen Driver data */
/*-----------------------------------------------------*/
/*
* Reads the CHANGELINE state; interrupt is valid if the changeline
* is low.
*/
static u8 read_chg(void)
{
return gpio_get_value(TOUCH_GPIO_IRQ_ATMEL_T9);
}
static u8 valid_interrupt(void)
{
return !read_chg();
}
static struct mxt_platform_data atmel_mxt_info = {
/* Maximum number of simultaneous touches to report. */
.numtouch = 10,
// TODO: no need for any hw-specific things at init/exit?
.init_platform_hw = NULL,
.exit_platform_hw = NULL,
.max_x = 1366,
.max_y = 768,
.valid_interrupt = &valid_interrupt,
.read_chg = &read_chg,
};
static struct i2c_board_info __initdata atmxt_i2c_info[] = {
{
I2C_BOARD_INFO("maXTouch", MXT_I2C_ADDRESS),
.irq = TEGRA_GPIO_TO_IRQ(TOUCH_GPIO_IRQ_ATMEL_T9),
.platform_data = &atmel_mxt_info,
},
};
struct tegra_touchscreen_init atmel_mxt_init_data = {
.irq_gpio = TOUCH_GPIO_IRQ_ATMEL_T9, /* GPIO1 Value for IRQ */
.rst_gpio = TOUCH_GPIO_RST_ATMEL_T9, /* GPIO2 Value for RST */
.sv_gpio1 = {1, TOUCH_GPIO_RST_ATMEL_T9, 0, 1}, /* Valid, GPIOx, Set value, Delay */
.sv_gpio2 = {1, TOUCH_GPIO_RST_ATMEL_T9, 1, 100}, /* Valid, GPIOx, Set value, Delay */
.ts_boardinfo = {TOUCH_BUS_ATMEL_T9, atmxt_i2c_info, 1} /* BusNum, BoardInfo, Value */
};
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