[PATCH 23/24] TTY: add tty_port_register_device helper

[Jiri Slaby]

This will automatically assign tty_port to tty_driver's port array for
later recall in tty_init_dev. This is intended to be called instead of
tty_register_device.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 drivers/tty/tty_port.c |    9 +++++++++
 include/linux/tty.h    |    3 +++
 2 files changed, 12 insertions(+)

diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 1ac8abf..4e9d2b2 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -33,6 +33,15 @@ void tty_port_init(struct tty_port *port)
 }
 EXPORT_SYMBOL(tty_port_init);
 
+struct device *tty_port_register_device(struct tty_port *port,
+		struct tty_driver *driver, unsigned index,
+		struct device *device)
+{
+	driver->ports[index] = port;
+	return tty_register_device(driver, index, device);
+}
+EXPORT_SYMBOL_GPL(tty_port_register_device);
+
 int tty_port_alloc_xmit_buf(struct tty_port *port)
 {
 	/* We may sleep in get_zeroed_page() */
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 45ef71d..40b18d7 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -497,6 +497,9 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 #define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))
 
 extern void tty_port_init(struct tty_port *port);
+extern struct device *tty_port_register_device(struct tty_port *port,
+		struct tty_driver *driver, unsigned index,
+		struct device *device);
 extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
 extern void tty_port_put(struct tty_port *port);
-- 
1.7.10.3


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