.code = KEY_LEFT,
.gpio = AT91_PIN_PC25,
.active_low =1,
.desc = "joystik left"

#include "mainwindow.h"
#include "ui_mainwindow.h"
int i;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
this ->setWindowFlags
(Qt::FramelessWindowHint|Qt::WindowShadeButtonHint);
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::keyPressEvent(QKeyEvent *event)
{
switch(event->key())
{
case Qt::Key_Left:
ui->label1->setText("poluchilos");
break;
}
QMainWindow::keyPressEvent(event);
}

#include <QMainWindow>
#include <QFileSystemWatcher>
#include <QTextStream>
#include <QFile>
#include <QKeyEvent>

namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void keyPressEvent(QKeyEvent *event);
private:
Ui::MainWindow *ui;
public slots:
};
#endif // MAINWINDOW_H

dmesg | grep input

ls /dev/input/event*

evtest /dev/input/eventN

dmesg | grep input

input: ADS7843 Touchscreen as /devices/platform/spi_gpio.3/spi3.0/input/input0

ls /dev/input/

event0 mice mouse0

evtest /dev/input/event0
Input driver version is 1.0.0
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "ADS7843 Touchscreen"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 330 (BTN_TOUCH)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 0
Min 150
Max 3830
Event code 1 (ABS_Y)
Value 0
Min 190
Max 3830
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 15000
Testing ... (interrupt to exit)

Input device->
* Event interface
Keyboard->
* AT Keyboard
* Gpio Buttons

root@неважно:~# dmesg |grep input
[ 1.291625] input: ti-tsc as /devices/platform/omap/ti_tscadc/tsc/input/input0
[ 1.549957] input: gpio-keys as /devices/platform/gpio-keys/input/input1
[ 2.784698] input: adp5589-keys as /devices/platform/omap/omap_i2c.1/i2c-1/1-0034/input/input2
root@неважно:~# evtest /dev/input/event1
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio-keys"
Supported events:
Event type 0 (Sync)
Event type 1 (Key)
Event code 116 (Power)
Event code 236 (?)
Testing ... (interrupt to exit)
^C

root@debian:/home/user/src/linux-2.6.36-rc6# cat .config|grep GPIO
CONFIG_GENERIC_GPIO=y
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_KEYBOARD_GPIO=y
CONFIG_I2C_GPIO=y
CONFIG_SPI_GPIO=y
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y
# Memory mapped GPIO expanders:
# CONFIG_GPIO_IT8761E is not set
# I2C GPIO expanders:
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_SX150X is not set
# CONFIG_GPIO_ADP5588 is not set
# PCI GPIO expanders:
# SPI GPIO expanders:
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_GPIO_MC33880 is not set
# AC97 GPIO expanders:
# MODULbus GPIO expanders:
# CONFIG_HTC_EGPIO is not set
# CONFIG_USB_GPIO_VBUS is not set

mount
ls /sys
touch /sys

mount
ls /sys
touch /sys

block class devices fs module
bus dev firmware kernel

static void __init ek_add_device_buttons(void)
{
int i;
printk("** ek_add_device_buttons start\n");

for (i = 0; i < ARRAY_SIZE(ek_buttons); i++) {

at91_set_GPIO_periph(ek_buttons[i].gpio, 1);

at91_set_deglitch(ek_buttons[i].gpio, 1);

}

platform_device_register(&ek_button_device);
printk("** ek_add_device_buttons finish\n");

}