4412 gpio读取pwm

一、可以使用的GPIO管脚

去掉占用调用的GPIO驱动，包括leds，buzzer，camera ov5640，WIFI mt6620 ，Keyboards

• VIDEO_OV5640– Device Drivers
  • – Multimedia support(MEDIA_SUPPORT [=y])
  • – Video capture adapters(VIDEO_CAPTURE_DRIVERS [=y])（去掉）
    
• MTK_COMBO_CHIP_MT6620– Device Drivers
  • – MediaTek Connectivity Combo Chip Config
  • – MediaTek Connectivity Combo Chip Support (MTK_COMBO [=y])（去掉）
  • – Select Chip (<choice> [=y])
    
• Enable LEDS config– Device Drivers
  • – Character devices
  • – Enable LEDS config
    
• Enable BUZZER config
  • – Device Drivers
  • – Character devices
  • – Enable BUZZER config
• Enable Keyboards
  • Device Drivers  --->
  • Input device support  --->
  • Keyboards  ---> 

static int led_gpios[] = {
    EXYNOS4_GPL2(0), EXYNOS4_GPK(1),　　　　/* Led IO 2个 */
    EXYNOS4_GPD0(0),　　　　　　　　　　　　　 /* BUZZER IO 1个 */

    EXYNOS4_GPX1(0), EXYNOS4_GPX1(3),EXYNOS4_GPX1(5),EXYNOS4_GPX1(6),　　　　/* 矩阵健盘8个 */
    EXYNOS4_GPX3(0),EXYNOS4_GPX2(6),EXYNOS4_GPX2(7),EXYNOS4_GPX3(5),

    EXYNOS4212_GPJ1(3),EXYNOS4_GPL0(1),EXYNOS4_GPL0(3),EXYNOS4212_GPJ1(0),　　　　　　/* 摄像头14个 */
    EXYNOS4212_GPJ1(2),EXYNOS4212_GPJ1(1),EXYNOS4212_GPJ0(7),EXYNOS4212_GPJ0(6),
    EXYNOS4212_GPJ0(5),EXYNOS4212_GPJ0(4),EXYNOS4212_GPJ0(0),EXYNOS4212_GPJ0(3),
　　 EXYNOS4212_GPJ0(1),EXYNOS4212_GPJ0(2),

    EXYNOS4_GPK3(6),EXYNOS4_GPK3(1),EXYNOS4_GPK3(4),EXYNOS4_GPK3(0),　　　　　　/* WIFI 7个 */
    EXYNOS4_GPK3(3),EXYNOS4_GPK3(5),EXYNOS4_GPC1(1),
};

led_gpios数组