#include <linux/init.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/platform_device.h>

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Du");
MODULE_DESCRIPTION("GPIO consumer API example for two LEDs");

static struct gpio_desc *led_blue;
static struct gpio_desc *led_red;

static int __init led_consumer_init(void)
{
    struct device *dev = NULL;

    pr_info("GPIO consumer LED module loading\n");

    // GPIOs per Name aus dem Device Tree holen (via label oder node property)
    led_blue = gpiod_get(dev, "led-blue", GPIOD_OUT_LOW);
    if (IS_ERR(led_blue)) {
        pr_err("Failed to get GPIO for blue LED\n");
        return PTR_ERR(led_blue);
    }

    led_red = gpiod_get(dev, "led-red", GPIOD_OUT_LOW);
    if (IS_ERR(led_red)) {
        pr_err("Failed to get GPIO for red LED\n");
        gpiod_put(led_blue);
        return PTR_ERR(led_red);
    }

    // Test: LEDs einschalten
    gpiod_set_value(led_blue, 1);
    gpiod_set_value(led_red, 1);
    msleep(500);
    gpiod_set_value(led_blue, 0);
    gpiod_set_value(led_red, 0);

    pr_info("LEDs blinked using gpio/consumer\n");

    return 0;
}

static void __exit led_consumer_exit(void)
{
    gpiod_set_value(led_blue, 0);
    gpiod_set_value(led_red, 0);

    gpiod_put(led_blue);
    gpiod_put(led_red);

    pr_info("GPIO consumer LED module unloaded\n");
}

module_init(led_consumer_init);
module_exit(led_consumer_exit);