内核中带有GPIO控制LED的驱动，驱动文件为：drivers/leds/leds-gpio.c ；实现了一个体系结构无关的GPIO LED驱动，使用此LED 驱动，开发者不需要修改一行代码，只需要在 BSP 的板文件（对于idea6410 为arch/arm/mach--s3c64xx/mach--smdk6410.c）中定义相关的platform设备和数据。在 idea6410开发板上,GPM0~GPM3 实现了四个 LED

1、其对应的platform 信息如下：

static struct gpio_led smdk6410_leds[] ={

    [0]= {

        .name = "LED1",

        .gpio = S3C64XX_GPM(0),

        },

    [1]= {

        .name = "LED2",

        .gpio = S3C64XX_GPM(1),

        },

    [2]= {

        .name = "LED3",

        .gpio = S3C64XX_GPM(2),

        },

    [3]= {

        .name = "LED4",

        .gpio = S3C64XX_GPM(3),

        },    

};

static struct gpio_led_platform_data smdk6410_gpio_led_pdata ={

    .num_leds    = ARRAY_SIZE(smdk6410_leds),

    .leds         =smdk6410_leds,

};

static struct platform_device smdk6410_device_led ={

    .name    = "leds-gpio",

    .id        = -1,

    .dev    ={

    .platform_data = &smdk6410_gpio_led_pdata,

    },

};

2、加入必要的头文件：
#include <linux/leds.h>

3、在static struct platform_device *smdk6410_devices[] __initdata中加入

&smdk6410_device_led,

4、配置内核，支持LED驱动：
  Device Drivers --->
     [*] LED Support  ---> 
    <*>   LED Class Support

   <*>   LED Support for GPIO connected LEDs