gpio.rar_led驱动_shipj9g

#include <linux/init.h> #include <linux/module.h> /*驱动注册的头文件，包含驱动的结构体和注册和卸载的函数*/ #include <linux/platform_device.h> /*注册杂项设备头文件*/ #include <linux/miscdevice.h> /*注册设备节点的文件结构体*/ #include <linux/fs.h> /*Linux中申请GPIO的头文件*/ #include <linux/gpio.h> /*三星平台的GPIO配置函数头文件*/ /*三星平台EXYNOS系列平台，GPIO配置参数宏定义头文件*/ #include <plat/gpio-cfg.h> #include <mach/gpio.h> /*三星平台4412平台，GPIO宏定义头文件*/ #include <mach/gpio-exynos4.h> #define DRIVER_NAME "hello_ctl" #define DEVICE_NAME "hello_gpio" MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("TOPEET"); /*led的两个IO，网络是KP_COL0，VDD50_EN*/ /*蜂鸣器的1个IO，网络是MOTOR_PWM*/ /*矩阵键盘的8个IO，网络是CHG_FLT，HOOK_DET，CHG_UOK，XEINT14_BAK， GM_INT1，6260_GPIO1，CHG_COK，XEINT29/KP_ROW13/ALV_DBG25*/ /*摄像头的14个IO，网络是CAM_MCLK，CAM2M_RST，CAM2M_PWDN， CAM_D5，CAM_D7，CAM_D6，CAM_D4，CAM_D3，CAM_D2，CAM_D1， CAM_PCLK，CAM_D0，CAM_VSYNC，CAM_HREF。 I2C_SDA7，I2C_SCL7也是可以设置为GPIO，不过总线一般不要去动它*/ /*WIFI模块的7个IO，WIFI_D3，WIFI_CMD，WIFI_D1，WIFI_CLK，WIFI_D0，WIFI_D2，GPC1_1*/ /*串口RX和TX等也是可以设置为GPIO，一般不要动它*/ /*数组中有32个引出到端子或者模块的IO，还有类似sd卡等也是可以作为GPIO， 其它引到连接器但是没有使用的GPIO等等*/ /*SCP管脚编号和POP的稍微有点不同，下面是SCP的*/ static int led_gpios[] = { EXYNOS4_GPL2(0),EXYNOS4_GPK1(1), EXYNOS4_GPD0(0), EXYNOS4_GPX1(0),EXYNOS4_GPX1(3),EXYNOS4_GPX1(5),EXYNOS4_GPX1(6), EXYNOS4_GPX3(0),EXYNOS4_GPX2(6),EXYNOS4_GPX2(7),EXYNOS4_GPX3(5), EXYNOS4212_GPJ1(3),EXYNOS4_GPL0(1),EXYNOS4_GPL0(3),EXYNOS4212_GPJ1(0), 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), EXYNOS4_GPK3(3),EXYNOS4_GPK3(5),EXYNOS4_GPC1(1), }; #define LED_NUM ARRAY_SIZE(led_gpios) static long hello_ioctl( struct file *files, unsigned int cmd, unsigned long arg){ printk("cmd is %d,arg is %d\n",cmd,arg); switch(cmd) { case 0: case 1: if (arg > LED_NUM) { return -EINVAL; } gpio_set_value(led_gpios[arg], cmd); break; default: return -EINVAL; } gpio_set_value(led_gpios[2], 0); return 0; } static int hello_release(struct inode *inode, struct file *file){ printk(KERN_EMERG "hello release\n"); return 0; } static int hello_open(struct inode *inode, struct file *file){ printk(KERN_EMERG "hello open\n"); return 0; } static struct file_operations hello_ops = { .owner = THIS_MODULE, .open = hello_open, .release = hello_release, .unlocked_ioctl = hello_ioctl, }; static struct miscdevice hello_dev = { .minor = MISC_DYNAMIC_MINOR, .name = DEVICE_NAME, .fops = &hello_ops, }; static int hello_probe(struct platform_device *pdv){ int ret,i; printk(KERN_EMERG "\tinitialized\n"); for(i=0; i<LED_NUM; i++) { ret = gpio_request(led_gpios[i], "LED"); if (ret) { printk("%s: request GPIO %d for LED failed, ret = %d\n", DRIVER_NAME, i, ret); } else{ s3c_gpio_cfgpin(led_gpios[i], S3C_GPIO_OUTPUT); gpio_set_value(led_gpios[i], 1); } } gpio_set_value(led_gpios[2], 0); misc_register(&hello_dev); if(ret<0) { printk("leds:register device failed!\n"); goto exit; } return 0; exit: misc_deregister(&hello_dev); return ret; return 0; } static int hello_remove(struct platform_device *pdv){ int i; printk(KERN_EMERG "\tremove\n"); for(i=0; i<LED_NUM; i++) { gpio_free(led_gpios[i]); } misc_deregister(&hello_dev); return 0; } static void hello_shutdown(struct platform_device *pdv){ ; } static int hello_suspend(struct platform_device *pdv,pm_message_t pmt){ return 0; } static int hello_resume(struct platform_device *pdv){ return 0; } struct platform_driver hello_driver = { .probe = hello_probe, .remove = hello_remove, .shutdown = hello_shutdown, .suspend = hello_suspend, .resume = hello_resume, .driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, } }; static int hello_init(void) { int DriverState; printk(KERN_EMERG "HELLO WORLD enter!\n"); DriverState = platform_driver_register(&hello_driver); printk(KERN_EMERG "\tDriverState is %d\n",DriverState); return 0; } static void hello_exit(void) { printk(KERN_EMERG "HELLO WORLD exit!\n"); void free_irq(unsigned int irq,void *dev_id); platform_driver_unregister(&hello_driver); } module_init(hello_init); module_exit(hello_exit);