Merge tag 'tty-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here is the big tty/serial driver patchset for 4.11-rc1.

  Not much here, but a lot of little fixes and individual serial driver
  updates all over the subsystem. Majority are for the sh-sci driver and
  platform (the arch-specific changes have acks from the maintainer).

  The start of the "serial bus" code is here as well, but nothing is
  converted to use it yet. That work is still ongoing, hopefully will
  start to show up across different subsystems for 4.12 (bluetooth is
  one major place that will be used.)

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (109 commits)
  tty: pl011: Work around QDF2400 E44 stuck BUSY bit
  atmel_serial: Use the fractional divider when possible
  tty: Remove extra include in HVC console tty framework
  serial: exar: Enable MSI support
  serial: exar: Move register defines from uapi header to consumer site
  serial: pci: Remove unused pci_boards entries
  serial: exar: Move Commtech adapters to 8250_exar as well
  serial: exar: Fix feature control register constants
  serial: exar: Fix initialization of EXAR registers for ports > 0
  serial: exar: Fix mapping of port I/O resources
  serial: sh-sci: fix hardware RX trigger level setting
  tty/serial: atmel: ensure state is restored after suspending
  serial: 8250_dw: Avoid "too much work" from bogus rx timeout interrupt
  serdev: ttyport: check whether tty_init_dev() fails
  serial: 8250_pci: make pciserial_detach_ports() static
  ARM: dts: STiH410-b2260: Enable HW flow-control
  ARM: dts: STiH407-family: Use new Pinctrl groups
  ARM: dts: STiH407-pinctrl: Add Pinctrl group for HW flow-control
  ARM: dts: STiH410-b2260: Identify the UART RTS line
  dt-bindings: serial: Update 'uart-has-rtscts' description
  ...

1 files changed, 10 insertions, 2 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 40144f382516..1017e904c0a3 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -217,12 +217,18 @@ struct tty_port_operations {
 	/* Called on the final put of a port */
 	void (*destruct)(struct tty_port *port);
 };
-	
+
+struct tty_port_client_operations {
+	int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t);
+	void (*write_wakeup)(struct tty_port *port);
+};
+
 struct tty_port {
 	struct tty_bufhead	buf;		/* Locked internally */
 	struct tty_struct	*tty;		/* Back pointer */
 	struct tty_struct	*itty;		/* internal back ptr */
 	const struct tty_port_operations *ops;	/* Port operations */
+	const struct tty_port_client_operations *client_ops; /* Port client operations */
 	spinlock_t		lock;		/* Lock protecting tty field */
 	int			blocked_open;	/* Waiting to open */
 	int			count;		/* Usage count */
@@ -241,6 +247,7 @@ struct tty_port {
 						   based drain is needed else
 						   set to size of fifo */
 	struct kref		kref;		/* Ref counter */
+	void 			*client_data;
 };
 
 /* tty_port::iflags bits -- use atomic bit ops */
@@ -528,6 +535,7 @@ extern int tty_alloc_file(struct file *file);
 extern void tty_add_file(struct tty_struct *tty, struct file *file);
 extern void tty_free_file(struct file *file);
 extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
+extern void tty_release_struct(struct tty_struct *tty, int idx);
 extern int tty_release(struct inode *inode, struct file *filp);
 extern void tty_init_termios(struct tty_struct *tty);
 extern int tty_standard_install(struct tty_driver *driver,
@@ -656,7 +664,7 @@ extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
 extern void tty_ldisc_release(struct tty_struct *tty);
 extern void tty_ldisc_init(struct tty_struct *tty);
 extern void tty_ldisc_deinit(struct tty_struct *tty);
-extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
+extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
 				 char *f, int count);
 
 /* n_tty.c */