static dev_t pi433_dev;
static DEFINE_IDR(pi433_idr);
static DEFINE_MUTEX(minor_lock); /* Protect idr accesses */
+static struct dentry *root_dir; /* debugfs root directory for the driver */
static struct class *pi433_class; /* mainly for udev to create /dev/pi433 */
/* spi setup */
spi_set_drvdata(spi, device);
- entry = debugfs_create_dir(dev_name(device->dev),
- debugfs_lookup(KBUILD_MODNAME, NULL));
+ entry = debugfs_create_dir(dev_name(device->dev), root_dir);
debugfs_create_file("regs", 0400, entry, device, &pi433_debugfs_regs_fops);
return 0;
static void pi433_remove(struct spi_device *spi)
{
struct pi433_device *device = spi_get_drvdata(spi);
- struct dentry *mod_entry = debugfs_lookup(KBUILD_MODNAME, NULL);
- debugfs_remove(debugfs_lookup(dev_name(device->dev), mod_entry));
+ debugfs_lookup_and_remove(dev_name(device->dev), root_dir);
/* free GPIOs */
free_gpio(device);
return PTR_ERR(pi433_class);
}
- debugfs_create_dir(KBUILD_MODNAME, NULL);
+ root_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
status = spi_register_driver(&pi433_spi_driver);
if (status < 0) {
spi_unregister_driver(&pi433_spi_driver);
class_destroy(pi433_class);
unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name);
- debugfs_remove_recursive(debugfs_lookup(KBUILD_MODNAME, NULL));
+ debugfs_remove(root_dir);
}
module_exit(pi433_exit);