drivers/char/Kconfig       |    8 ++
 drivers/char/Makefile      |    1 
 drivers/char/pcf8563-rtc.c |  135 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 143 insertions(+), 1 deletion(-)

--- linux-nas100d.orig/drivers/char/Kconfig	2005-11-16 22:29:03.000000000 +0100
+++ linux-nas100d/drivers/char/Kconfig	2005-11-30 23:04:56.000000000 +0100
@@ -783,6 +783,13 @@ config RTC_VR41XX
 	tristate "NEC VR4100 series Real Time Clock Support"
 	depends on CPU_VR41XX
 
+config RTC_PCF8563
+        tristate "PCF8563 I2C RTC Support"
+        depends on I2C && RTC_PCF8563_I2C
+	help
+	  This driver enables the kernel to use the PCF8563
+	  I2C real time clock as the system clock.
+
 config COBALT_LCD
 	bool "Support for Cobalt LCD"
 	depends on MIPS_COBALT
@@ -1014,4 +1021,3 @@ config TELCLOCK
 	  files for controlling the behavior of this hardware.
 
 endmenu
-
--- linux-nas100d.orig/drivers/char/Makefile	2005-11-16 22:29:03.000000000 +0100
+++ linux-nas100d/drivers/char/Makefile	2005-11-30 23:01:35.000000000 +0100
@@ -65,6 +65,7 @@ obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o
 obj-$(CONFIG_DS1302) += ds1302.o
 obj-$(CONFIG_S3C2410_RTC) += s3c2410-rtc.o
 obj-$(CONFIG_RTC_VR41XX) += vr41xx_rtc.o
+obj-$(CONFIG_RTC_PCF8563) += pcf8563-rtc.o
 ifeq ($(CONFIG_GENERIC_NVRAM),y)
   obj-$(CONFIG_NVRAM) += generic_nvram.o
 else
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nas100d/drivers/char/pcf8563-rtc.c	2005-11-30 23:06:53.000000000 +0100
@@ -0,0 +1,135 @@
+/*
+ * drivers/char/pcf8563-rtc.c
+ *
+ * PCF8563 RTC platform driver
+ *
+ * Copyright (C) 2005 Tower Technologies
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/time.h>
+#include <linux/rtc.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <linux/i2c.h>
+#include <linux/pcf8563.h>
+
+#include <asm/rtc.h>
+
+#define DRV_VERSION "0.9"
+
+extern int (*set_rtc)(void);
+
+static int pcf8563_set_rtc(void)
+{
+	int err;
+
+	struct rtc_time new_tm, old_tm;
+	unsigned long cur_secs = xtime.tv_sec;
+
+	if ((err = pcf8563_do_command(PCF8563_CMD_GETDATETIME, &old_tm) == 0))
+		return err;
+
+	/* FIXME      xtime.tv_nsec = old_tm.tm_sec * 10000000; */
+	new_tm.tm_sec  = cur_secs % 60;
+	cur_secs /= 60;
+	new_tm.tm_min  = cur_secs % 60;
+	cur_secs /= 60;
+	new_tm.tm_hour = cur_secs % 24;
+
+       /*
+	* avoid writing when we're going to change the day
+	* of the month.  We will retry in the next minute.
+	* This basically means that if the RTC must not drift
+	* by more than 1 minute in 11 minutes.
+	*/
+	if ((old_tm.tm_hour == 23 && old_tm.tm_min == 59) ||
+	    (new_tm.tm_hour == 23 && new_tm.tm_min == 59))
+		return 1;
+
+	return pcf8563_do_command(PCF8563_CMD_SETTIME, &new_tm);
+}
+
+static int pcf8563_rtc_read_time(struct rtc_time *tm)
+{
+	return pcf8563_do_command(PCF8563_CMD_GETDATETIME, tm);
+}
+
+static int pcf8563_rtc_set_time(struct rtc_time *tm)
+{
+	return pcf8563_do_command(PCF8563_CMD_SETDATETIME, tm);
+}
+
+static int pcf8563_rtc_proc(char *buf)
+{
+	char *p = buf;
+
+	p += sprintf(p, "24hr\t\t: yes\n");
+
+	return p - buf;
+}
+
+static struct rtc_ops pcf8563_rtc_ops = {
+	.owner		= THIS_MODULE,
+	.proc		= pcf8563_rtc_proc,
+	.read_time	= pcf8563_rtc_read_time,
+	.set_time	= pcf8563_rtc_set_time,
+};
+
+static int pcf8563_rtc_probe(struct device *dev)
+{
+	int ret;
+
+	if ((ret = register_rtc(&pcf8563_rtc_ops)) != 0)
+		return ret;
+
+	set_rtc = pcf8563_set_rtc;
+
+	printk(KERN_INFO "pcf8563-rtc: real time clock\n");
+
+	return 0;
+}
+
+static int pcf8563_rtc_remove(struct device *dev)
+{
+	set_rtc = NULL;
+
+	unregister_rtc(&pcf8563_rtc_ops);
+
+	return 0;
+}
+
+static struct device_driver pcf8563_rtc_driver = {
+	.name		= "pcf8563-rtc",
+        .bus            = &platform_bus_type,
+	.probe		= pcf8563_rtc_probe,
+	.remove		= pcf8563_rtc_remove,
+};
+
+static int __init pcf8563_rtc_init(void)
+{
+        return driver_register(&pcf8563_rtc_driver);
+}
+
+static void __exit pcf8563_rtc_exit(void)
+{
+        driver_unregister(&pcf8563_rtc_driver);
+}
+
+module_init(pcf8563_rtc_init);
+module_exit(pcf8563_rtc_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("Xicor PCF8563 RTC platform driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);