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[PATCH 2/2] [loongson] fuloong: add RTC_LIB Support

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH 2/2] [loongson] fuloong: add RTC_LIB Support
From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Wed, 4 Nov 2009 23:49:44 +0800
Cc: Arnaud Patard <apatard@mandriva.com>, Wu Zhangjin <wuzhangjin@gmail.com>, linux-mips@linux-mips.org, rtc-linux@googlegroups.com
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This patch add the RTC_LIB support for fuloong2e,fuloong2f.

To make hwclock work with it normally, please do:

kernel configuration:

Device Drivers --->
<*> Real Time Clock --->
        <*>   PC-style 'CMOS'

user-space configuration:

$ mknod /dev/rtc0 c 254 0

/dev/rtc0 is the default RTC device file.

of course, if udevd is installed, ignore the above user-space
configuration.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
 arch/mips/loongson/common/Makefile |    7 +++++
 arch/mips/loongson/common/rtc.c    |   45 ++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/loongson/common/rtc.c

diff --git a/arch/mips/loongson/common/Makefile 
b/arch/mips/loongson/common/Makefile
index d3138b8..d2184c8 100644
--- a/arch/mips/loongson/common/Makefile
+++ b/arch/mips/loongson/common/Makefile
@@ -16,3 +16,10 @@ obj-$(CONFIG_SERIAL_8250) += serial.o
 # space
 #
 obj-$(CONFIG_CS5536) += cs5536/
+
+#
+# Enable RTC Class support
+#
+# please enable CONFIG_RTC_DRV_CMOS
+#
+obj-$(CONFIG_RTC_DRV_CMOS) += rtc.o
diff --git a/arch/mips/loongson/common/rtc.c b/arch/mips/loongson/common/rtc.c
new file mode 100644
index 0000000..fe9464a
--- /dev/null
+++ b/arch/mips/loongson/common/rtc.c
@@ -0,0 +1,45 @@
+/*
+ *  Registration of Cobalt RTC platform device.
+ *
+ *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ *  Copyright (C) 2009  Wu Zhangjin <wuzj@lemote.com>
+ *
+ *  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.
+ */
+
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
+
+static struct resource rtc_cmos_resource[] = {
+       {
+               .start  = RTC_PORT(0),
+               .end    = RTC_PORT(1),
+               .flags  = IORESOURCE_IO,
+       },
+       {
+               .start  = RTC_IRQ,
+               .end    = RTC_IRQ,
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+static struct platform_device rtc_cmos_device = {
+       .name           = "rtc_cmos",
+       .id             = -1,
+       .num_resources  = ARRAY_SIZE(rtc_cmos_resource),
+       .resource       = rtc_cmos_resource
+};
+
+static __init int rtc_cmos_init(void)
+{
+       platform_device_register(&rtc_cmos_device);
+
+       return 0;
+}
+
+device_initcall(rtc_cmos_init);
-- 
1.6.2.1


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