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, 33 insertions, 9 deletions

diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index b88832e8ee82..22df94f107e5 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -16,7 +16,7 @@
  *
  * Copyright (C) 2004 Infineon IFAP DC COM CPE
  * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
+ * Copyright (C) 2007 John Crispin <john@phrozen.org>
  * Copyright (C) 2010 Thomas Langer, <thomas.langer@lantiq.com>
  */
 
@@ -557,7 +557,7 @@ lqasc_verify_port(struct uart_port *port,
 	return ret;
 }
 
-static struct uart_ops lqasc_pops = {
+static const struct uart_ops lqasc_pops = {
 	.tx_empty =	lqasc_tx_empty,
 	.set_mctrl =	lqasc_set_mctrl,
 	.get_mctrl =	lqasc_get_mctrl,
@@ -590,13 +590,20 @@ lqasc_console_putchar(struct uart_port *port, int ch)
 	ltq_w8(ch, port->membase + LTQ_ASC_TBUF);
 }
 
+static void lqasc_serial_port_write(struct uart_port *port, const char *s,
+				    u_int count)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ltq_asc_lock, flags);
+	uart_console_write(port, s, count, lqasc_console_putchar);
+	spin_unlock_irqrestore(&ltq_asc_lock, flags);
+}
 
 static void
 lqasc_console_write(struct console *co, const char *s, u_int count)
 {
 	struct ltq_uart_port *ltq_port;
-	struct uart_port *port;
-	unsigned long flags;
 
 	if (co->index >= MAXPORTS)
 		return;
@@ -605,11 +612,7 @@ lqasc_console_write(struct console *co, const char *s, u_int count)
 	if (!ltq_port)
 		return;
 
-	port = &ltq_port->port;
-
-	spin_lock_irqsave(&ltq_asc_lock, flags);
-	uart_console_write(port, s, count, lqasc_console_putchar);
-	spin_unlock_irqrestore(&ltq_asc_lock, flags);
+	lqasc_serial_port_write(&ltq_port->port, s, count);
 }
 
 static int __init
@@ -659,6 +662,27 @@ lqasc_console_init(void)
 }
 console_initcall(lqasc_console_init);
 
+static void lqasc_serial_early_console_write(struct console *co,
+					     const char *s,
+					     u_int count)
+{
+	struct earlycon_device *dev = co->data;
+
+	lqasc_serial_port_write(&dev->port, s, count);
+}
+
+static int __init
+lqasc_serial_early_console_setup(struct earlycon_device *device,
+				 const char *opt)
+{
+	if (!device->port.membase)
+		return -ENODEV;
+
+	device->con->write = lqasc_serial_early_console_write;
+	return 0;
+}
+OF_EARLYCON_DECLARE(lantiq, DRVNAME, lqasc_serial_early_console_setup);
+
 static struct uart_driver lqasc_reg = {
 	.owner =	THIS_MODULE,
 	.driver_name =	DRVNAME,