linux核心源碼裡的平台裝置led驅動(不斷閃爍)

驅動代碼

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <mach/gpio.h>
#include <linux/leds.h>

struct gpio_led leds[] = {
    {"led0", "heartbeat", GPIOA(18), 0, 0, 0},
};

struct gpio_led_platform_data pdata = {
    .num_leds = ARRAY_SIZE(leds),
    .leds = leds,
};


struct platform_device mypdev = {
    .name = "leds-gpio", 
    .id = -1,
    .dev = {
        .platform_data = &pdata,
    },
};

module_driver(mypdev, platform_device_register, platform_device_unregister);
MODULE_LICENSE("GPL");
           

驅動配置在圖形化配置菜單裡選：

Device Driver ---> Led Support

如下圖配置

加載驅動後，led不斷閃爍；

^_^ /# echo 1 > /sys/class/leds/led0/brightness                             //led亮

^_^ /# echo 0 > /sys/class/leds/led0/brightness                             //led滅