[RESEND PATCH v3] serial/arc-uart: Add new driver

[Vineet.Gupta1]

From: Vineet Gupta <vgupta@xxxxxxxxxxxx>

Hi,

Please find following ARC UART driver with all the review comments incorporated.
It's rebased off of current tip (commit 12250d843e)

Please consider merging.

Thx,
-Vineet

v3:
* Removed empty arc_serial_set_ldisc()
* More set_termios fixes - CSIZE forced to CS8 (for 8N1)
* global @running_on_iss replaced with platform data, saved in device
  specific port structure.

v2:
* ttyARC used as device name
* Dynamic assignment of major/minor numbers.
* Ref counting tty in rx routine to prevent it from disappearing in
  case of a hangup
* set_termios fixes:
  - hardware flow control/parity are marked as unsupported
  - baud written back to termios
* cosmetics such as commenting the need for @running_on_iss, empty lines
  etc

Vineet Gupta (1):
  serial/arc-uart: Add new driver

 drivers/tty/serial/Kconfig    |   25 ++
 drivers/tty/serial/Makefile   |    1 +
 drivers/tty/serial/arc_uart.c |  747 +++++++++++++++++++++++++++++++++++++++++
 include/linux/serial_core.h   |    3 +
 4 files changed, 776 insertions(+), 0 deletions(-)
 create mode 100644 drivers/tty/serial/arc_uart.c

-- 
1.7.4.1

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