linux 唤醒源 寄存器

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/gpio.h>

static int __init wakeup_init(void) {
    // 假设GPIO 17被配置为唤醒源
    int gpio = 17;
    if (!gpio_is_valid(gpio)) {
        printk(KERN_ERR "Invalid GPIO number
");
        return -ENODEV;
    }

    // 请求GPIO
    if (gpio_request(gpio, "wakeup_gpio") < 0) {
        printk(KERN_ERR "Failed to request GPIO
");
        return -EBUSY;
    }

    // 配置GPIO为唤醒源
    if (gpio_set_wakeup_flags(gpio, GPIO_WAKEUP_ENABLE) < 0) {
        printk(KERN_ERR "Failed to set wakeup flags
");
        gpio_free(gpio);
        return -EIO;
    }

    printk(KERN_INFO "Wakeup GPIO configured successfully
");
    return 0;
}

static void __exit wakeup_exit(void) {
    int gpio = 17;
    gpio_set_wakeup_flags(gpio, GPIO_WAKEUP_DISABLE);
    gpio_free(gpio);
    printk(KERN_INFO "Wakeup GPIO deconfigured successfully
");
}

module_init(wakeup_init);
module_exit(wakeup_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("Wakeup Source Register Example");