diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.35/012-serial.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.35/012-serial.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.35/012-serial.patch b/target/linux/xburst/patches-2.6.35/012-serial.patch new file mode 100644 index 0000000000..677ebf76f4 --- /dev/null +++ b/target/linux/xburst/patches-2.6.35/012-serial.patch @@ -0,0 +1,82 @@ +From d9d3dc9a5a28b2bbb82fedca63aadae8ca540e94 Mon Sep 17 00:00:00 2001 +From: Lars-Peter Clausen <lars@metafoo.de> +Date: Sat, 19 Jun 2010 04:08:16 +0000 +Subject: [PATCH] MIPS: JZ4740: Add serial support + +The JZ4740 UART interface is almost 16550 compatible. +The UART module needs to be enabled by setting a bit in the FCR register +and it has support for receive timeout interrupts. Instead of adding yet +another machine specific quirk to the 8250 serial driver we provide a +serial_out implementation which sets the required additional flags. + +Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> +Cc: linux-mips@linux-mips.org +Cc: linux-kernel@vger.kernel.org +Patchwork: https://patchwork.linux-mips.org/patch/1403/ +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + arch/mips/jz4740/serial.c | 33 +++++++++++++++++++++++++++++++++ + arch/mips/jz4740/serial.h | 20 ++++++++++++++++++++ + 2 files changed, 53 insertions(+), 0 deletions(-) + create mode 100644 arch/mips/jz4740/serial.c + create mode 100644 arch/mips/jz4740/serial.h + +--- /dev/null ++++ b/arch/mips/jz4740/serial.c +@@ -0,0 +1,33 @@ ++/* ++ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> ++ * JZ4740 serial support ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * You should have received a copy of the GNU General Public License along ++ * with this program; if not, write to the Free Software Foundation, Inc., ++ * 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ */ ++ ++#include <linux/io.h> ++#include <linux/serial_core.h> ++#include <linux/serial_reg.h> ++ ++void jz4740_serial_out(struct uart_port *p, int offset, int value) ++{ ++ switch (offset) { ++ case UART_FCR: ++ value |= 0x10; /* Enable uart module */ ++ break; ++ case UART_IER: ++ value |= (value & 0x4) << 2; ++ break; ++ default: ++ break; ++ } ++ writeb(value, p->membase + (offset << p->regshift)); ++} +--- /dev/null ++++ b/arch/mips/jz4740/serial.h +@@ -0,0 +1,20 @@ ++/* ++ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> ++ * JZ4740 serial support ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ * ++ * You should have received a copy of the GNU General Public License along ++ * with this program; if not, write to the Free Software Foundation, Inc., ++ * 675 Mass Ave, Cambridge, MA 02139, USA. ++ * ++ */ ++ ++#ifndef __MIPS_JZ4740_SERIAL_H__ ++ ++void jz4740_serial_out(struct uart_port *p, int offset, int value); ++ ++#endif |