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66 lines
2.4 KiB
Diff
66 lines
2.4 KiB
Diff
From c420811f117a59a4a7d4e34b362437b91c7fafa1 Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Fri, 25 Jan 2013 19:39:51 +0100
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Subject: [PATCH] serial: ralink: adds support for the serial core found on
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ralink wisoc
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The MIPS based Ralink WiSoC platform has 1 or more 8250 compatible serial cores.
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To make them work we require the same quirks that are used by AU1x00.
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Signed-off-by: John Crispin <blogic@openwrt.org>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/tty/serial/8250/8250.c | 6 +++---
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drivers/tty/serial/8250/Kconfig | 8 ++++++++
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include/linux/serial_core.h | 2 +-
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3 files changed, 12 insertions(+), 4 deletions(-)
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--- a/drivers/tty/serial/8250/8250.c
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+++ b/drivers/tty/serial/8250/8250.c
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@@ -345,9 +345,9 @@ static void default_serial_dl_write(stru
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serial_out(up, UART_DLM, value >> 8 & 0xff);
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}
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-#ifdef CONFIG_MIPS_ALCHEMY
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+#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
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-/* Au1x00 UART hardware has a weird register layout */
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+/* Au1x00/RT288x UART hardware has a weird register layout */
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static const u8 au_io_in_map[] = {
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[UART_RX] = 0,
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[UART_IER] = 2,
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@@ -527,7 +527,7 @@ static void set_io_from_upio(struct uart
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break;
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#endif
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-#ifdef CONFIG_MIPS_ALCHEMY
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+#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
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case UPIO_AU:
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p->serial_in = au_serial_in;
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p->serial_out = au_serial_out;
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--- a/drivers/tty/serial/8250/Kconfig
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+++ b/drivers/tty/serial/8250/Kconfig
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@@ -277,3 +277,11 @@ config SERIAL_8250_EM
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Selecting this option will add support for the integrated serial
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port hardware found on the Emma Mobile line of processors.
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If unsure, say N.
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+
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+config SERIAL_8250_RT288X
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+ bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
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+ depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883)
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+ help
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+ If you have a Ralink RT288x/RT305x SoC based board and want to use the
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+ serial port, say Y to this option. The driver can handle up to 2 serial
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+ ports. If unsure, say N.
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--- a/include/linux/serial_core.h
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+++ b/include/linux/serial_core.h
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@@ -134,7 +134,7 @@ struct uart_port {
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#define UPIO_HUB6 (1)
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#define UPIO_MEM (2)
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#define UPIO_MEM32 (3)
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-#define UPIO_AU (4) /* Au1x00 type IO */
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+#define UPIO_AU (4) /* Au1x00 and RT288x type IO */
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#define UPIO_TSI (5) /* Tsi108/109 type IO */
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#define UPIO_RM9000 (6) /* RM9000 type IO */
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