06_virtual_led_basic/test_module.c

@@ -3,13 +3,8 @@
 #include <linux/leds.h>
 #include <linux/module.h>
 
-static void virtual_led_brightness_set(struct led_classdev *led_cdev, enum led_brightness brightness) {
+static void virtual_led_set_brightness(struct led_classdev *led_cdev, enum led_brightness brightness) {
-	pr_info("Luminosité défini sur la LED %s à %d\n", led_cdev->name, brightness);
+	pr_info("Luminosité défini sur la LED %s à %d", led_cdev->name, brightness);
-}
-
-static enum led_brightness virtual_led_brightness_get(struct led_classdev *led_cdev) {
-	pr_info("Luminosité lu sur la LED %s, valeur actuelle: %d\n", led_cdev->name, led_cdev->brightness);
-	return led_cdev->brightness;
 }
 
 static struct led_classdev virtual_led = {
@@ -17,28 +12,27 @@ static struct led_classdev virtual_led = {
 	.color = LED_COLOR_ID_WHITE,
 	.brightness = 0,
 	.max_brightness = 255,
-	.brightness_set = virtual_led_brightness_set,
+	.brightness_set = virtual_led_set_brightness
-	.brightness_set = virtual_led_brightness_get
 };
 
 static int __init virtual_led_init(void) {
 	int ret;
-	pr_info("Chargement du module pour la LED virtuelle\n");
+	pr_info("Chargement du module pour la LED virtuelle");
 
 	ret = led_classdev_register(NULL, &virtual_led);
 	if (ret < 0) {
-		pr_err("Impossible d'ajouter la LED virtuelle\n");
+		pr_err("Impossible d'ajouter la LED virtuelle");
 		return ret;
 	}
 
-	pr_info("La LED virtuelle est ajouté\n");
+	pr_info("La LED virtuelle est ajouté");
 	return 0;
 }
 
 static void __exit virtual_led_exit(void) {
-	pr_info("Déchargement du module pour la LED virtuelle\n");
+	pr_info("Déchargement du module pour la LED virtuelle");
 	led_classdev_unregister(&virtual_led);
-	pr_info("La LED virtuelle est bien retiré\n");
+	pr_info("La LED virtuelle est bien retiré");
 }
 
 module_init(virtual_led_init);

07_virtual_leds_more_complex/Makefile

@@ -1,7 +0,0 @@
-obj-m += test_module.o
-
-all:
-	make -C $(LINUX_MODULES_FOLDER)/build M=$(PWD) modules
-
-clean:
-	make -C $(LINUX_MODULES_FOLDER)/build M=$(PWD) clean

07_virtual_leds_more_complex/test_module.c

@@ -1,87 +0,0 @@
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/leds.h>
-#include <linux/module.h>
-
-#define NUM_LEDS 5
-
-struct flo_device {
-	struct led_classdev *leds[NUM_LEDS];
-};
-
-static struct flo_device flo_dev;
-
-static void virtual_led_brightness_set(struct led_classdev *led_cdev, enum led_brightness brightness) {
-	pr_info("Luminosité défini sur la LED %s à %d\n", led_cdev->name, brightness);
-}
-
-static enum led_brightness virtual_led_brightness_get(struct led_classdev *led_cdev) {
-	pr_info("Luminosité lu sur la LED %s, valeur actuelle: %d\n", led_cdev->name, led_cdev->brightness);
-	return led_cdev->brightness;
-}
-
-static int __init virtual_led_init(void) {
-	int ret, i;
-	pr_info("Chargement du module pour les LEDs virtuelles\n");
-
-	for (i = 0; i < NUM_LEDS; i++) {
-		struct led_classdev *led = kzalloc(sizeof(struct led_classdev), GFP_KERNEL);
-		if (!led) {
-			pr_err("Échec de l'allocation de mémoire pour la LED %d\n", i);
-			ret = -ENOMEM;
-			goto fail;
-		}
-
-		led->name = kasprintf(GFP_KERNEL, "flo-led:white:flo-%d", i + 1);
-		led->color = LED_COLOR_ID_WHITE;
-		led->brightness = 0;
-		led->max_brightness = 255;
-		led->brightness_set = virtual_led_brightness_set;
-		led->brightness_get = virtual_led_brightness_get;
-
-		ret = led_classdev_register(NULL, led);
-		if (ret < 0) {
-			pr_err("Impossible d'ajouter la LED virtuelle %d\n", i);
-			kfree(led->name);
-			kfree(led);
-			goto fail;
-		}
-
-		flo_dev.leds[i] = led;
-	}
-
-	pr_info("Les LEDs virtuelles sont ajoutées\n");
-	return 0;
-
-fail:
-	for (i--; i >= 0; i--) {
-		led_classdev_unregister(flo_dev.leds[i]);
-		kfree(flo_dev.leds[i]->name);
-		kfree(flo_dev.leds[i]);
-	}
-	pr_err("Les LEDs virtuelles n'ont pas pu être ajoutées\n");
-	return ret;
-}
-
-static void __exit virtual_led_exit(void) {
-	int i;
-	pr_info("Déchargement du module pour les LEDs virtuelles\n");
-
-	for (i = 0; i < NUM_LEDS; i++) {
-		if (flo_dev.leds[i]) {
-			led_classdev_unregister(flo_dev.leds[i]);
-			kfree(flo_dev.leds[i]->name);
-			kfree(flo_dev.leds[i]);
-		}
-	}
-
-	pr_info("Les LEDs virtuelles sont bien retirées\n");
-}
-
-module_init(virtual_led_init);
-module_exit(virtual_led_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Florian RICHER");
-MODULE_DESCRIPTION("Un module noyau qui ajoute des LEDs virtuelles");
-MODULE_VERSION("1.0");