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

[Wu Zhangjin]

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@...>
---
 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@...>
+ *  Copyright (C) 2009  Wu Zhangjin <wuzj@...>
+ *
+ *  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

[Arnaud Patard]

Wu Zhangjin <wuzhangjin@...> writes:
Hi,

> + *  Registration of Cobalt RTC platform device.

Of Cobalt platform device ? I thought we were on loongson :)

> + *
> + *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@...>
> + *  Copyright (C) 2009  Wu Zhangjin <wuzj@...>
> + *
> + *  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;

what about return platform_device_register(&rtc_cmos_device); ?


Arnaud

[Wu Zhangjin]

Hi,

On Wed, 2009-11-04 at 17:03 +0100, Arnaud Patard wrote:
> Wu Zhangjin <wuzhangjin@...> writes:
> Hi,
>
> > + *  Registration of Cobalt RTC platform device.
>
> Of Cobalt platform device ? I thought we were on loongson :)
>

Ooh, I just copied the header ;) will remove it later.

> > + *
> > + *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@...>
> > + *  Copyright (C) 2009  Wu Zhangjin <wuzj@...>
> > + *
> > + *  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;
>
> what about return platform_device_register(&rtc_cmos_device); ?
>
>

Okay, later.

Regards,
        Wu Zhangjin