61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#include <linux/init.h> /* needed for macros */
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#include <linux/kernel.h> /* needed for debugging */
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#include <linux/module.h> /* needed by all modules */
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#include <linux/cdev.h> /* needed for char device driver */
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#include <linux/fs.h> /* needed for device drivers */
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#include <linux/uaccess.h> /* needed to copy data to/from user */
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#include <linux/device.h> /* needed for sysfs handling */
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#include <linux/miscdevice.h>
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#include <linux/platform_device.h> /* needed for sysfs handling */
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static int val;
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ssize_t sysfs_show_val(struct device* dev, struct device_attribute* attr, char* buf) {
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pr_info("sysfs_show_val: val=%d\n", val);
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sprintf(buf, "%d\n", val);
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return strlen(buf);
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}
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ssize_t sysfs_store_val(struct device* dev, struct device_attribute* attr, const char* buf, size_t count) {
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pr_info("sysfs_store_val: buf=%s\n", buf);
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val = simple_strtol(buf, 0, 10);
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return count;
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}
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DEVICE_ATTR(val, 0664, sysfs_show_val, sysfs_store_val);
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static struct class* sysfs_class;
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static struct device* sysfs_device;
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static int __init skeleton_init(void) {
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int status = 0;
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sysfs_class = class_create(THIS_MODULE, "my_sysfs_class");
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sysfs_device = device_create(sysfs_class, NULL, 0, NULL, "my_sysfs_device");
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if (status == 0) status = device_create_file(sysfs_device, &dev_attr_val);
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pr_info("Linux module skeleton loaded\n");
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return 0;
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}
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static void __exit skeleton_exit(void) {
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device_remove_file(sysfs_device, &dev_attr_val);
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device_destroy(sysfs_class, 0);
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class_destroy(sysfs_class);
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pr_info("Linux module skeleton unloaded\n");
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}
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module_init (skeleton_init);
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module_exit (skeleton_exit);
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MODULE_AUTHOR("Fastium <fastium.pro@proton.me>");
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MODULE_AUTHOR("Klagarge <remi@heredero.ch>");
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MODULE_DESCRIPTION ("Module pilot charachter oriented");
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MODULE_LICENSE ("GPL");
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