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Commit c420811f authored by John Crispin's avatar John Crispin Committed by Greg Kroah-Hartman
Browse files

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: default avatarJohn Crispin <blogic@openwrt.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9fe8074b

drivers/tty/serial/8250/8250.c

+3 −3
Original line number Diff line number Diff line
@@ -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;

drivers/tty/serial/8250/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -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.

include/linux/serial_core.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */