From c420811f117a59a4a7d4e34b362437b91c7fafa1 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Fri, 25 Jan 2013 19:39:51 +0100 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 6 +++--- drivers/tty/serial/8250/Kconfig | 8 ++++++++ include/linux/serial_core.h | 2 +- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 24939ca..0efc815 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -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; diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index d31f4c6..2ef9537 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -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. diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 82aebc8..d971421 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -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 */ -- 1.7.10.4