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serial: ralink: adds support for the serial core found on ralink wisoc 

The MIPS based Ralink WiSoC platform has 1 or more 8250 compatible serial cores.
To make them work we require the same quirks that are used by AU1x00.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John Crispin 2013-01-25 19:39:51 +01:00 committed by Greg Kroah-Hartman
parent 9fe8074b82
commit c420811f11
3 changed files with 12 additions and 4 deletions
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6
drivers/tty/serial/8250/8250.c
View File

@ -317,9 +317,9 @@ static void default_serial_dl_write(struct uart_8250_port *up, int value)
serial_out(up, UART_DLM, value >> 8 & 0xff);
}
#ifdef CONFIG_MIPS_ALCHEMY
#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
/* Au1x00 UART hardware has a weird register layout */
/* Au1x00/RT288x UART hardware has a weird register layout */
static const u8 au_io_in_map[] = {
[UART_RX] = 0,
[UART_IER] = 2,
@ -440,7 +440,7 @@ static void set_io_from_upio(struct uart_port *p)
p->serial_out = mem32_serial_out;
break;
#ifdef CONFIG_MIPS_ALCHEMY
#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
case UPIO_AU:
p->serial_in = au_serial_in;
p->serial_out = au_serial_out;

8
drivers/tty/serial/8250/Kconfig
View File

@ -276,3 +276,11 @@ config SERIAL_8250_EM
Selecting this option will add support for the integrated serial
port hardware found on the Emma Mobile line of processors.
If unsure, say N.
config SERIAL_8250_RT288X
bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883)
help
If you have a Ralink RT288x/RT305x SoC based board and want to use the
serial port, say Y to this option. The driver can handle up to 2 serial
ports. If unsure, say N.

2
include/linux/serial_core.h
View File

@ -134,7 +134,7 @@ struct uart_port {
#define UPIO_HUB6 (1)
#define UPIO_MEM (2)
#define UPIO_MEM32 (3)
#define UPIO_AU (4) /* Au1x00 type IO */
#define UPIO_AU (4) /* Au1x00 and RT288x type IO */
#define UPIO_TSI (5) /* Tsi108/109 type IO */
unsigned int read_status_mask; /* driver specific */