target/linux/ramips/patches-3.8/0015-serial-ralink-adds-support-for-the-serial-core-found.patch

   1 From 219ec2244c2e9085e6900dc515a24f6655c79827 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Fri, 25 Jan 2013 19:39:51 +0100
   4 Subject: [PATCH 15/79] serial: ralink: adds support for the serial core found
   5  on ralink wisoc
   6
   7 The MIPS based Ralink WiSoC platform has 1 or more 8250 compatible serial cores.
   8 To make them work we require the same quirks that are used by AU1x00.
   9
  10 Signed-off-by: John Crispin <blogic@openwrt.org>
  11 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  12 ---
  13  drivers/tty/serial/8250/8250.c  |    6 +++---
  14  drivers/tty/serial/8250/Kconfig |    8 ++++++++
  15  include/linux/serial_core.h     |    2 +-
  16  3 files changed, 12 insertions(+), 4 deletions(-)
  17
  18 diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
  19 index f932043..f72eb7d 100644
  20 --- a/drivers/tty/serial/8250/8250.c
  21 +++ b/drivers/tty/serial/8250/8250.c
  22 @@ -324,9 +324,9 @@ static void default_serial_dl_write(struct uart_8250_port *up, int value)
  23         serial_out(up, UART_DLM, value >> 8 & 0xff);
  24  }
  25
  26 -#ifdef CONFIG_MIPS_ALCHEMY
  27 +#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
  28
  29 -/* Au1x00 UART hardware has a weird register layout */
  30 +/* Au1x00/RT288x UART hardware has a weird register layout */
  31  static const u8 au_io_in_map[] = {
  32         [UART_RX]  = 0,
  33         [UART_IER] = 2,
  34 @@ -506,7 +506,7 @@ static void set_io_from_upio(struct uart_port *p)
  35                 break;
  36  #endif
  37
  38 -#ifdef CONFIG_MIPS_ALCHEMY
  39 +#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
  40         case UPIO_AU:
  41                 p->serial_in = au_serial_in;
  42                 p->serial_out = au_serial_out;
  43 diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
  44 index c31133a..9e4febd 100644
  45 --- a/drivers/tty/serial/8250/Kconfig
  46 +++ b/drivers/tty/serial/8250/Kconfig
  47 @@ -277,3 +277,11 @@ config SERIAL_8250_EM
  48           Selecting this option will add support for the integrated serial
  49           port hardware found on the Emma Mobile line of processors.
  50           If unsure, say N.
  51 +
  52 +config SERIAL_8250_RT288X
  53 +       bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
  54 +       depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883)
  55 +       help
  56 +         If you have a Ralink RT288x/RT305x SoC based board and want to use the
  57 +         serial port, say Y to this option. The driver can handle up to 2 serial
  58 +         ports. If unsure, say N.
  59 diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
  60 index c6690a2..0b428d6 100644
  61 --- a/include/linux/serial_core.h
  62 +++ b/include/linux/serial_core.h
  63 @@ -134,7 +134,7 @@ struct uart_port {
  64  #define UPIO_HUB6              (1)
  65  #define UPIO_MEM               (2)
  66  #define UPIO_MEM32             (3)
  67 -#define UPIO_AU                        (4)                     /* Au1x00 type IO */
  68 +#define UPIO_AU                        (4)                     /* Au1x00 and RT288x type IO */
  69  #define UPIO_TSI               (5)                     /* Tsi108/109 type IO */
  70  #define UPIO_RM9000            (6)                     /* RM9000 type IO */
  71
  72 --
  73 1.7.10.4
  74