USB: typec: Re-use DEFINE_SHOW_ATTRIBUTE() macro

...instead of open coding file operations followed by custom ->open()
callbacks per each attribute.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/fusb302/fusb302.c

@@ -199,7 +199,7 @@ static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...)
 	va_end(args);
 }
 
-static int fusb302_seq_show(struct seq_file *s, void *v)
+static int fusb302_debug_show(struct seq_file *s, void *v)
 {
 	struct fusb302_chip *chip = (struct fusb302_chip *)s->private;
 	int tail;
@@ -216,18 +216,7 @@ static int fusb302_seq_show(struct seq_file *s, void *v)
 
 	return 0;
 }
-
-static int fusb302_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, fusb302_seq_show, inode->i_private);
-}
-
-static const struct file_operations fusb302_debug_operations = {
-	.open		= fusb302_debug_open,
-	.llseek		= seq_lseek,
-	.read		= seq_read,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(fusb302_debug);
 
 static struct dentry *rootdir;
 
@@ -242,7 +231,7 @@ static int fusb302_debugfs_init(struct fusb302_chip *chip)
 
 	chip->dentry = debugfs_create_file(dev_name(chip->dev),
 					   S_IFREG | 0444, rootdir,
-					   chip, &fusb302_debug_operations);
+					   chip, &fusb302_debug_fops);
 
 	return 0;
 }

drivers/usb/typec/tcpm.c

@@ -506,7 +506,7 @@ static void tcpm_log_source_caps(struct tcpm_port *port)
 	}
 }
 
-static int tcpm_seq_show(struct seq_file *s, void *v)
+static int tcpm_debug_show(struct seq_file *s, void *v)
 {
 	struct tcpm_port *port = (struct tcpm_port *)s->private;
 	int tail;
@@ -523,18 +523,7 @@ static int tcpm_seq_show(struct seq_file *s, void *v)
 
 	return 0;
 }
-
-static int tcpm_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, tcpm_seq_show, inode->i_private);
-}
-
-static const struct file_operations tcpm_debug_operations = {
-	.open		= tcpm_debug_open,
-	.llseek		= seq_lseek,
-	.read		= seq_read,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
 
 static struct dentry *rootdir;
 
@@ -550,7 +539,7 @@ static int tcpm_debugfs_init(struct tcpm_port *port)
 
 	port->dentry = debugfs_create_file(dev_name(port->dev),
 					   S_IFREG | 0444, rootdir,
-					   port, &tcpm_debug_operations);
+					   port, &tcpm_debug_fops);
 
 	return 0;
 }