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@xxxxxxxxxxx>
---
Changes in V2
* adds missing "/" in source code comment
Changes in V3
* rebase on tty-next
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 cb7db5a..33aa86a 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -311,9 +311,9 @@ 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,
@@ -434,7 +434,7 @@ 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
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