如何在源码中设置4412外部中断引脚

大家好，有一个问题咨询一下：
tiny4412 ADK板中，中断脚和GPIo脚是复用的，在哪里设置按键的所接的脚为外部中断脚功能呢？

可以参考按键驱动，搜索相关寄存器即可

参考arch/arm/mach-exynos/mach-tiny4412.c里调用s3c_gpio_cfgpin()的地方。这是arch/arm/plat-samsung/include/plat/gpio-cfg.h里关于s3c_gpio_cfgpin()的说明：

/**
* s3c_gpio_cfgpin() - Change the GPIO function of a pin.
* @pin pin The pin number to configure.
* @to to The configuration for the pin's function.
*
* Configure which function is actually connected to the external
* pin, such as an gpio input, output or some form of special function
* connected to an internal peripheral block.
*
* The @to parameter can be one of the generic S3C_GPIO_INPUT, S3C_GPIO_OUTPUT
* or S3C_GPIO_SFN() to indicate one of the possible values that the helper
* will then generate the correct bit mask and shift for the configuration.
*
* If a bank of GPIOs all needs to be set to special-function 2, then
* the following code will work:
*
*      for (gpio = start; gpio < end; gpio++)
*              s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
*
* The @to parameter can also be a specific value already shifted to the
* correct position in the control register, although these are discouraged
* in newer kernels and are only being kept for compatibility.
*/
extern int s3c_gpio_cfgpin(unsigned int pin, unsigned int to);

我在GPX0_7上焊接了一个电阻，并在按键源码中修改了:
static struct button_desc buttons[] = {
    { EXYNOS4_GPX3(2), 0, "KEY0" },
    { EXYNOS4_GPX3(3), 1, "KEY1" },
    { EXYNOS4_GPX3(4), 2, "KEY2" },
    //{ EXYNOS4_GPX0(7), 3, "KEY3" },
    { EXYNOS4_GPX0(7), 0, "KEY3" },
};

发现是可以相应中断的。但是我并没有发现关于GPX0(7)复用管脚的设置。 请问中断怎么做到的。

焊的上拉电阻和按键。

你好 我也是4412用户 方便加个qq 交流一下gpio问题吗？