1 From c420811f117a59a4a7d4e34b362437b91c7fafa1 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] serial: ralink: adds support for the serial core found on
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.
10 Signed-off-by: John Crispin <blogic@openwrt.org>
11 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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(-)
18 --- a/drivers/tty/serial/8250/8250.c
19 +++ b/drivers/tty/serial/8250/8250.c
20 @@ -345,9 +345,9 @@ static void default_serial_dl_write(stru
21 serial_out(up, UART_DLM, value >> 8 & 0xff);
24 -#ifdef CONFIG_MIPS_ALCHEMY
25 +#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
27 -/* Au1x00 UART hardware has a weird register layout */
28 +/* Au1x00/RT288x UART hardware has a weird register layout */
29 static const u8 au_io_in_map[] = {
32 @@ -527,7 +527,7 @@ static void set_io_from_upio(struct uart
36 -#ifdef CONFIG_MIPS_ALCHEMY
37 +#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
39 p->serial_in = au_serial_in;
40 p->serial_out = au_serial_out;
41 --- a/drivers/tty/serial/8250/Kconfig
42 +++ b/drivers/tty/serial/8250/Kconfig
43 @@ -277,3 +277,11 @@ config SERIAL_8250_EM
44 Selecting this option will add support for the integrated serial
45 port hardware found on the Emma Mobile line of processors.
48 +config SERIAL_8250_RT288X
49 + bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
50 + depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883)
52 + If you have a Ralink RT288x/RT305x SoC based board and want to use the
53 + serial port, say Y to this option. The driver can handle up to 2 serial
54 + ports. If unsure, say N.
55 --- a/include/linux/serial_core.h
56 +++ b/include/linux/serial_core.h
57 @@ -134,7 +134,7 @@ struct uart_port {
60 #define UPIO_MEM32 (3)
61 -#define UPIO_AU (4) /* Au1x00 type IO */
62 +#define UPIO_AU (4) /* Au1x00 and RT288x type IO */
63 #define UPIO_TSI (5) /* Tsi108/109 type IO */
64 #define UPIO_RM9000 (6) /* RM9000 type IO */