add attribute (9.4)

1 files changed, 7 insertions, 17 deletions

diff --git a/driver/main.c b/driver/main.c
index 8775727..2676c9a 100644
--- a/driver/main.c
+++ b/driver/main.c
@@ -1,26 +1,11 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/platform_device.h>
 
+#include "main.h"
 #include "platform.h"
 
-static const struct of_device_id lork_ids[] = {
-	{ .compatible = "gpio-extern" },
-	{},
-};
-
-struct platform_driver lork_driver = {
-	.probe = lork_probe,
-	.remove = lork_remove,
-	.driver = {
-		.name = "gpio-extern",
-		.owner = THIS_MODULE,
-		.of_match_table = of_match_ptr(lork_ids),
-	}
-};
-
 struct class* class;
 
 static int mod_init(void) {
@@ -38,17 +23,22 @@ static int mod_init(void) {
 	err = platform_driver_register(&lork_driver);
 	if (err) goto return_err;
 
+	// create attribute under /sys/bus/platform/drivers/gpio-extern
+	err = driver_create_file(&lork_driver.driver, &attr);
+	if (err) goto return_err;
+
 	printk("%s() OK\n", __PRETTY_FUNCTION__);
 	return 0;
 
+return_err:
 free_class:
 	class_destroy(class);
-return_err:
 	printk("%s() -> %d\n", __PRETTY_FUNCTION__, err);
 	return err;
 }
 
 static void mod_exit(void) {
+	driver_remove_file(&lork_driver.driver, &attr);
 	platform_driver_unregister(&lork_driver);
 	class_destroy(class);
 	printk("%s()\n", __PRETTY_FUNCTION__);