path: root/packages/linux/nas100d-kernel/2.6.15/40-rtc-class.patch

--- linux-nslu2.orig/include/linux/rtc.h	2006-01-03 15:31:18.000000000 +0100
+++ linux-nslu2/include/linux/rtc.h	2006-01-03 15:34:24.000000000 +0100
@@ -91,8 +91,81 @@ struct rtc_pll_info {
 #define RTC_PLL_GET	_IOR('p', 0x11, struct rtc_pll_info)  /* Get PLL correction */
 #define RTC_PLL_SET	_IOW('p', 0x12, struct rtc_pll_info)  /* Set PLL correction */
 
+/* interrupt flags */
+#define RTC_IRQF 0x80 /* any of the following is active */
+#define RTC_PF 0x40
+#define RTC_AF 0x20
+#define RTC_UF 0x10
+
 #ifdef __KERNEL__
 
+#include <linux/device.h>
+#include <linux/seq_file.h>
+#include <linux/cdev.h>
+#include <linux/poll.h>
+
+struct rtc_class_ops {
+	int (*open)(struct device *);
+	void (*release)(struct device *);
+	int (*ioctl)(struct device *, unsigned int, unsigned long);
+	int (*read_time)(struct device *, struct rtc_time *);
+	int (*set_time)(struct device *, struct rtc_time *);
+	int (*read_alarm)(struct device *, struct rtc_wkalrm *);
+	int (*set_alarm)(struct device *, struct rtc_wkalrm *);
+	int (*proc)(struct device *, struct seq_file *);
+	int (*set_mmss)(struct device *, unsigned long secs);
+	int (*irq_set_state)(struct device *, int enabled);
+	int (*irq_set_freq)(struct device *, int freq);
+};
+
+#define RTC_DEVICE_NAME_SIZE 20
+struct rtc_task;
+
+struct rtc_device
+{
+	int id;
+	struct module *owner;
+	struct rw_semaphore lock;
+	struct class_device class_dev;
+	struct rtc_class_ops *ops;
+	char name[RTC_DEVICE_NAME_SIZE];
+
+	struct cdev char_dev;
+	struct semaphore char_sem;
+
+	unsigned long irq_data;
+	spinlock_t irq_lock;
+	wait_queue_head_t irq_queue;
+	struct fasync_struct *async_queue;
+
+	spinlock_t irq_task_lock;
+	struct rtc_task *irq_task;
+	int irq_freq;
+};
+#define to_rtc_device(d) container_of(d, struct rtc_device, class_dev)
+
+extern struct rtc_device *rtc_device_register(char *name,
+					struct device *dev,
+					struct rtc_class_ops *ops,
+					struct module *owner);
+extern void rtc_device_unregister(struct rtc_device *rdev);
+extern int rtc_interface_register(struct class_interface *intf);
+
+
+extern int rtc_month_days(unsigned int month, unsigned int year);
+extern int rtc_valid_tm(struct rtc_time *tm);
+extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time);
+extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm);
+
+extern int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm);
+extern int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm);
+extern int rtc_read_alarm(struct class_device *class_dev,
+				struct rtc_wkalrm *alrm);
+extern int rtc_set_alarm(struct class_device *class_dev,
+				struct rtc_wkalrm *alrm);
+extern void rtc_update_irq(struct class_device *class_dev,
+			unsigned long num, unsigned long events);
+
 typedef struct rtc_task {
 	void (*func)(void *private_data);
 	void *private_data;
--- linux-nslu2.orig/drivers/Kconfig	2006-01-03 15:31:19.000000000 +0100
+++ linux-nslu2/drivers/Kconfig	2006-01-04 01:27:31.000000000 +0100
@@ -66,4 +66,6 @@ source "drivers/infiniband/Kconfig"
 
 source "drivers/sn/Kconfig"
 
+source "drivers/rtc/Kconfig"
+
 endmenu
--- linux-nslu2.orig/drivers/Makefile	2006-01-03 15:33:32.000000000 +0100
+++ linux-nslu2/drivers/Makefile	2006-01-04 01:27:31.000000000 +0100
@@ -54,6 +54,7 @@ obj-$(CONFIG_USB_GADGET)	+= usb/gadget/
 obj-$(CONFIG_GAMEPORT)		+= input/gameport/
 obj-$(CONFIG_INPUT)		+= input/
 obj-$(CONFIG_I2O)		+= message/
+obj-y				+= rtc/
 obj-$(CONFIG_I2C)		+= i2c/
 obj-$(CONFIG_W1)		+= w1/
 obj-$(CONFIG_HWMON)		+= hwmon/
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/class.c	2006-01-03 15:45:19.000000000 +0100
@@ -0,0 +1,141 @@
+/*
+ * RTC subsystem, base class
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * class skeleton from drivers/hwmon/hwmon.c
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/kdev_t.h>
+#include <linux/idr.h>
+
+static DEFINE_IDR(rtc_idr);
+static DECLARE_MUTEX(idr_lock);
+struct class *rtc_class;
+
+static void rtc_device_release(struct class_device *class_dev)
+{
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+	down(&idr_lock);
+	idr_remove(&rtc_idr, rtc->id);
+	up(&idr_lock);
+	kfree(rtc);
+}
+
+/**
+ * rtc_device_register - register w/ RTC class
+ * @dev: the device to register
+ *
+ * rtc_device_unregister() must be called when the class device is no
+ * longer needed.
+ *
+ * Returns the pointer to the new struct class device.
+ */
+struct rtc_device *rtc_device_register(char *name, struct device *dev,
+					struct rtc_class_ops *ops,
+					struct module *owner)
+{
+	struct rtc_device *rtc;
+	int id, err;
+
+	if (idr_pre_get(&rtc_idr, GFP_KERNEL) == 0) {
+		err = -ENOMEM;
+		goto exit;
+	}
+
+
+	down(&idr_lock);
+	err = idr_get_new(&rtc_idr, NULL, &id);
+	up(&idr_lock);
+
+	if (err < 0)
+		goto exit;
+
+	id = id & MAX_ID_MASK;
+
+	if ((rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL)) == NULL) {
+		err = -ENOMEM;
+		goto exit_idr;
+	}
+
+	rtc->id = id;
+	rtc->ops = ops;
+	rtc->owner = owner;
+	rtc->class_dev.dev = dev;
+	rtc->class_dev.class = rtc_class;
+	rtc->class_dev.release = rtc_device_release;
+
+	init_rwsem(&rtc->lock);
+	spin_lock_init(&rtc->irq_lock);
+	spin_lock_init(&rtc->irq_task_lock);
+
+	strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE);
+	snprintf(rtc->class_dev.class_id, BUS_ID_SIZE, "rtc%d", id);
+
+	if ((err = class_device_register(&rtc->class_dev)))
+		goto exit_kfree;
+
+	dev_info(dev, "rtc core: registered %s as %s\n",
+			rtc->name, rtc->class_dev.class_id);
+
+	return rtc;
+
+exit_kfree:
+	kfree(rtc);
+
+exit_idr:
+	idr_remove(&rtc_idr, id);
+
+exit:
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(rtc_device_register);
+
+
+/**
+ * rtc_device_unregister - removes the previously registered RTC class device
+ *
+ * @rtc: the RTC class device to destroy
+ */
+void rtc_device_unregister(struct rtc_device *rtc)
+{
+	down_write(&rtc->lock);
+	class_device_unregister(&rtc->class_dev);
+}
+EXPORT_SYMBOL_GPL(rtc_device_unregister);
+
+int rtc_interface_register(struct class_interface *intf)
+{
+	intf->class = rtc_class;
+	return class_interface_register(intf);
+}
+EXPORT_SYMBOL_GPL(rtc_interface_register);
+
+static int __init rtc_init(void)
+{
+	rtc_class = class_create(THIS_MODULE, "rtc");
+	if (IS_ERR(rtc_class)) {
+		printk(KERN_ERR "%s: couldn't create class\n", __FILE__);
+		return PTR_ERR(rtc_class);
+	}
+	return 0;
+}
+
+static void __exit rtc_exit(void)
+{
+	class_destroy(rtc_class);
+}
+
+module_init(rtc_init);
+module_exit(rtc_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towerteh.it>");
+MODULE_DESCRIPTION("RTC class support");
+MODULE_LICENSE("GPL");
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/Kconfig	2006-01-04 01:27:21.000000000 +0100
@@ -0,0 +1,93 @@
+#
+# RTC class/drivers configuration
+#
+
+menu "Real Time Clock"
+
+config RTC_CLASS
+	tristate "RTC class"
+	depends on EXPERIMENTAL
+	default y
+	help
+	  Generic RTC class support. If you say yes here, you will
+ 	  be allowed to plug one or more RTCs to your system. You will
+	  probably want to enable one of more of the interfaces below.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-class.
+
+comment "RTC interfaces"
+	depends on RTC_CLASS
+
+config RTC_INTF_SYSFS
+	tristate "sysfs"
+	depends on RTC_CLASS && SYSFS
+	default RTC_CLASS
+	help
+	  Say yes here if you want to use your RTC using the sysfs
+	  interface, /sys/class/rtc/rtcX .
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-sysfs.
+
+config RTC_INTF_PROC
+	tristate "proc"
+	depends on RTC_CLASS && PROC_FS
+	default RTC_CLASS
+	help
+	  Say yes here if you want to use your RTC using the proc
+	  interface, /proc/driver/rtc .
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-proc.
+
+config RTC_INTF_DEV
+	tristate "dev"
+	depends on RTC_CLASS
+	default RTC_CLASS
+	help
+	  Say yes here if you want to use your RTC using the dev
+	  interface, /dev/rtc .
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-dev.
+
+comment "RTC drivers"
+	depends on RTC_CLASS
+
+config RTC_DRV_X1205
+	tristate "Xicor/Intersil X1205 RTC chip"
+	depends on RTC_CLASS && I2C
+	help
+	  If you say yes here you get support for the
+	  Xicor/Intersil X1205 RTC chip.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-x1205.
+
+config RTC_DRV_DS1672
+	tristate "Dallas/Maxim DS1672"
+	depends on RTC_CLASS && I2C
+	help
+	  If you say yes here you get support for the
+	  Dallas/Maxim DS1672 timekeeping chip.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-ds1672.
+
+config RTC_DRV_TEST
+	tristate "Test driver/device"
+	depends on RTC_CLASS
+	help
+	  If you say yes here you get support for the
+	  RTC test driver. It's a software RTC which can be
+	  used to test the RTC subsystem APIs. It gets
+	  the time from the system clock.
+	  You want this driver only if you are doing development
+	  on the RTC subsystem. Please read the source code
+	  for further details.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-test.
+
+endmenu
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/Makefile	2006-01-04 01:27:21.000000000 +0100
@@ -0,0 +1,15 @@
+#
+# Makefile for RTC class/drivers.
+#
+
+obj-y				+= utils.o
+obj-$(CONFIG_RTC_CLASS)		+= rtc-core.o
+rtc-core-y			:= class.o interface.o
+obj-$(CONFIG_RTC_INTF_SYSFS)	+= rtc-sysfs.o
+obj-$(CONFIG_RTC_INTF_PROC)	+= rtc-proc.o
+obj-$(CONFIG_RTC_INTF_DEV)	+= rtc-dev.o
+
+obj-$(CONFIG_RTC_DRV_X1205)	+= rtc-x1205.o
+obj-$(CONFIG_RTC_DRV_TEST)	+= rtc-test.o
+obj-$(CONFIG_RTC_DRV_DS1672)	+= rtc-ds1672.o
+
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/interface.c	2006-01-03 15:34:24.000000000 +0100
@@ -0,0 +1,189 @@
+/*
+ * RTC subsystem, interface functions
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based on arch/arm/common/rtctime.c
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/rtc.h>
+
+extern struct class *rtc_class;
+
+int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm)
+{
+	int err = -EINVAL;
+	struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
+
+	if (ops->read_time) {
+		memset(tm, 0, sizeof(struct rtc_time));
+		err = ops->read_time(class_dev->dev, tm);
+	}
+	return err;
+}
+EXPORT_SYMBOL(rtc_read_time);
+
+int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm)
+{
+	int err;
+	struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
+
+	err = rtc_valid_tm(tm);
+	if (err == 0 && ops->set_time)
+		err = ops->set_time(class_dev->dev, tm);
+
+	return err;
+}
+EXPORT_SYMBOL(rtc_set_time);
+
+int rtc_read_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
+{
+	struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
+	int err = -EINVAL;
+
+	if (ops->read_alarm) {
+		memset(alarm, 0, sizeof(struct rtc_wkalrm));
+		err = ops->read_alarm(class_dev->dev, alarm);
+	}
+	return err;
+}
+EXPORT_SYMBOL(rtc_read_alarm);
+
+int rtc_set_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
+{
+	int err = -EINVAL;
+	struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
+
+	if (ops->set_alarm)
+		err = ops->set_alarm(class_dev->dev, alarm);
+	return err;
+}
+EXPORT_SYMBOL(rtc_set_alarm);
+
+void rtc_update_irq(struct class_device *class_dev,
+		unsigned long num, unsigned long events)
+{
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	spin_lock(&rtc->irq_lock);
+	rtc->irq_data = (rtc->irq_data + (num << 8)) | events;
+	spin_unlock(&rtc->irq_lock);
+
+	spin_lock(&rtc->irq_task_lock);
+	if (rtc->irq_task)
+		rtc->irq_task->func(rtc->irq_task->private_data);
+	spin_unlock(&rtc->irq_task_lock);
+
+	wake_up_interruptible(&rtc->irq_queue);
+	kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);
+}
+EXPORT_SYMBOL(rtc_update_irq);
+
+struct class_device *rtc_open(char *name)
+{
+	struct class_device *class_dev = NULL,
+				*class_dev_tmp;
+
+	down(&rtc_class->sem);
+	list_for_each_entry(class_dev_tmp, &rtc_class->children, node) {
+		if (strncmp(class_dev_tmp->class_id, name, BUS_ID_SIZE) == 0) {
+			class_dev = class_dev_tmp;
+			break;
+		}
+	}
+	up(&rtc_class->sem);
+
+	return class_dev;
+}
+EXPORT_SYMBOL(rtc_open);
+
+void rtc_close(struct class_device *class_dev)
+{
+}
+EXPORT_SYMBOL(rtc_close);
+
+int rtc_irq_register(struct class_device *class_dev, struct rtc_task *task)
+{
+	int retval = -EBUSY;
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	if (task == NULL || task->func == NULL)
+		return -EINVAL;
+
+	spin_lock(&rtc->irq_task_lock);
+	if (rtc->irq_task == NULL) {
+		rtc->irq_task = task;
+		retval = 0;
+	}
+	spin_unlock(&rtc->irq_task_lock);
+
+	return retval;
+}
+EXPORT_SYMBOL(rtc_irq_register);
+
+void rtc_irq_unregister(struct class_device *class_dev, struct rtc_task *task)
+{
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	spin_lock(&rtc->irq_task_lock);
+	if (rtc->irq_task == task)
+		rtc->irq_task = NULL;
+	spin_unlock(&rtc->irq_task_lock);
+}
+EXPORT_SYMBOL(rtc_irq_unregister);
+
+int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int enabled)
+{
+	int err = 0;
+	unsigned long flags;
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	spin_lock_irqsave(&rtc->irq_task_lock, flags);
+	if (rtc->irq_task != task)
+		err = -ENXIO;
+	spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
+
+	if (err == 0)
+		err = rtc->ops->irq_set_state(class_dev->dev, enabled);
+
+	return err;
+}
+EXPORT_SYMBOL(rtc_irq_set_state);
+
+int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq)
+{
+	int err = 0, tmp = 0;
+	unsigned long flags;
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	/* allowed range is 2-8192 */
+	if (freq < 2 || freq > 8192)
+		return -EINVAL;
+
+/*	if ((freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE)))
+		return -EACCES;
+*/
+	/* check if freq is a power of 2 */
+	while (freq > (1 << tmp))
+		tmp++;
+
+	if (freq != (1 << tmp))
+		return -EINVAL;
+
+	spin_lock_irqsave(&rtc->irq_task_lock, flags);
+	if (rtc->irq_task != task)
+		err = -ENXIO;
+	spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
+
+	if (err == 0) {
+		if ((err = rtc->ops->irq_set_freq(class_dev->dev, freq)) == 0)
+			rtc->irq_freq = freq;
+	}
+	return err;
+
+}
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/utils.c	2006-01-03 15:34:24.000000000 +0100
@@ -0,0 +1,97 @@
+/*
+ * RTC subsystem, utility functions
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based on arch/arm/common/rtctime.c
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/rtc.h>
+
+static const unsigned char rtc_days_in_month[] = {
+	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+};
+
+#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
+#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
+
+int rtc_month_days(unsigned int month, unsigned int year)
+{
+	return rtc_days_in_month[month] + (LEAP_YEAR(year) && month == 1);
+}
+EXPORT_SYMBOL(rtc_month_days);
+
+/*
+ * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
+ */
+void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
+{
+	int days, month, year;
+
+	days = time / 86400;
+	time -= days * 86400;
+
+	tm->tm_wday = (days + 4) % 7;
+
+	year = 1970 + days / 365;
+	days -= (year - 1970) * 365
+	        + LEAPS_THRU_END_OF(year - 1)
+	        - LEAPS_THRU_END_OF(1970 - 1);
+	if (days < 0) {
+		year -= 1;
+		days += 365 + LEAP_YEAR(year);
+	}
+	tm->tm_year = year - 1900;
+	tm->tm_yday = days + 1;
+
+	for (month = 0; month < 11; month++) {
+		int newdays;
+
+		newdays = days - rtc_month_days(month, year);
+		if (newdays < 0)
+			break;
+		days = newdays;
+	}
+	tm->tm_mon = month;
+	tm->tm_mday = days + 1;
+
+	tm->tm_hour = time / 3600;
+	time -= tm->tm_hour * 3600;
+	tm->tm_min = time / 60;
+	tm->tm_sec = time - tm->tm_min * 60;
+}
+EXPORT_SYMBOL(rtc_time_to_tm);
+
+/*
+ * Does the rtc_time represent a valid date/time?
+ */
+int rtc_valid_tm(struct rtc_time *tm)
+{
+	if (tm->tm_year < 70 ||
+	    tm->tm_mon >= 12 ||
+	    tm->tm_mday < 1 ||
+	    tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900) ||
+	    tm->tm_hour >= 24 ||
+	    tm->tm_min >= 60 ||
+	    tm->tm_sec >= 60)
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL(rtc_valid_tm);
+
+/*
+ * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
+ */
+int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
+{
+	*time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+		       tm->tm_hour, tm->tm_min, tm->tm_sec);
+	return 0;
+}
+EXPORT_SYMBOL(rtc_tm_to_time);
--- linux-nslu2.orig/arch/arm/Kconfig	2006-01-04 01:27:04.000000000 +0100
+++ linux-nslu2/arch/arm/Kconfig	2006-01-04 01:27:31.000000000 +0100
@@ -750,6 +750,8 @@ source "drivers/usb/Kconfig"
 
 source "drivers/mmc/Kconfig"
 
+source "drivers/rtc/Kconfig"
+
 endmenu
 
 source "fs/Kconfig"
--- linux-nslu2.orig/arch/arm/common/rtctime.c	2006-01-04 01:27:04.000000000 +0100
+++ linux-nslu2/arch/arm/common/rtctime.c	2006-01-04 01:27:09.000000000 +0100
@@ -40,89 +40,6 @@ static struct rtc_ops *rtc_ops;
 
 #define rtc_epoch 1900UL
 
-static const unsigned char days_in_month[] = {
-	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
-};
-
-#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
-#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
-
-static int month_days(unsigned int month, unsigned int year)
-{
-	return days_in_month[month] + (LEAP_YEAR(year) && month == 1);
-}
-
-/*
- * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
- */
-void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
-{
-	int days, month, year;
-
-	days = time / 86400;
-	time -= days * 86400;
-
-	tm->tm_wday = (days + 4) % 7;
-
-	year = 1970 + days / 365;
-	days -= (year - 1970) * 365
-	        + LEAPS_THRU_END_OF(year - 1)
-	        - LEAPS_THRU_END_OF(1970 - 1);
-	if (days < 0) {
-		year -= 1;
-		days += 365 + LEAP_YEAR(year);
-	}
-	tm->tm_year = year - 1900;
-	tm->tm_yday = days + 1;
-
-	for (month = 0; month < 11; month++) {
-		int newdays;
-
-		newdays = days - month_days(month, year);
-		if (newdays < 0)
-			break;
-		days = newdays;
-	}
-	tm->tm_mon = month;
-	tm->tm_mday = days + 1;
-
-	tm->tm_hour = time / 3600;
-	time -= tm->tm_hour * 3600;
-	tm->tm_min = time / 60;
-	tm->tm_sec = time - tm->tm_min * 60;
-}
-EXPORT_SYMBOL(rtc_time_to_tm);
-
-/*
- * Does the rtc_time represent a valid date/time?
- */
-int rtc_valid_tm(struct rtc_time *tm)
-{
-	if (tm->tm_year < 70 ||
-	    tm->tm_mon >= 12 ||
-	    tm->tm_mday < 1 ||
-	    tm->tm_mday > month_days(tm->tm_mon, tm->tm_year + 1900) ||
-	    tm->tm_hour >= 24 ||
-	    tm->tm_min >= 60 ||
-	    tm->tm_sec >= 60)
-		return -EINVAL;
-
-	return 0;
-}
-EXPORT_SYMBOL(rtc_valid_tm);
-
-/*
- * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
- */
-int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
-{
-	*time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
-		       tm->tm_hour, tm->tm_min, tm->tm_sec);
-
-	return 0;
-}
-EXPORT_SYMBOL(rtc_tm_to_time);
-
 /*
  * Calculate the next alarm time given the requested alarm time mask
  * and the current time.
@@ -141,13 +58,13 @@ void rtc_next_alarm_time(struct rtc_time
 	next->tm_sec = alrm->tm_sec;
 }
 
-static inline int rtc_read_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_arm_read_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
 	memset(tm, 0, sizeof(struct rtc_time));
 	return ops->read_time(tm);
 }
 
-static inline int rtc_set_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
 	int ret;
 
@@ -158,7 +75,7 @@ static inline int rtc_set_time(struct rt
 	return ret;
 }
 
-static inline int rtc_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
 	int ret = -EINVAL;
 	if (ops->read_alarm) {
@@ -168,7 +85,7 @@ static inline int rtc_read_alarm(struct 
 	return ret;
 }
 
-static inline int rtc_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_arm_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
 	int ret = -EINVAL;
 	if (ops->set_alarm)
@@ -256,7 +173,7 @@ static int rtc_ioctl(struct inode *inode
 
 	switch (cmd) {
 	case RTC_ALM_READ:
-		ret = rtc_read_alarm(ops, &alrm);
+		ret = rtc_arm_read_alarm(ops, &alrm);
 		if (ret)
 			break;
 		ret = copy_to_user(uarg, &alrm.time, sizeof(tm));
@@ -278,11 +195,11 @@ static int rtc_ioctl(struct inode *inode
 		alrm.time.tm_wday = -1;
 		alrm.time.tm_yday = -1;
 		alrm.time.tm_isdst = -1;
-		ret = rtc_set_alarm(ops, &alrm);
+		ret = rtc_arm_set_alarm(ops, &alrm);
 		break;
 
 	case RTC_RD_TIME:
-		ret = rtc_read_time(ops, &tm);
+		ret = rtc_arm_read_time(ops, &tm);
 		if (ret)
 			break;
 		ret = copy_to_user(uarg, &tm, sizeof(tm));
@@ -300,7 +217,7 @@ static int rtc_ioctl(struct inode *inode
 			ret = -EFAULT;
 			break;
 		}
-		ret = rtc_set_time(ops, &tm);
+		ret = rtc_arm_set_time(ops, &tm);
 		break;
 
 	case RTC_EPOCH_SET:
@@ -331,11 +248,11 @@ static int rtc_ioctl(struct inode *inode
 			ret = -EFAULT;
 			break;
 		}
-		ret = rtc_set_alarm(ops, &alrm);
+		ret = rtc_arm_set_alarm(ops, &alrm);
 		break;
 
 	case RTC_WKALM_RD:
-		ret = rtc_read_alarm(ops, &alrm);
+		ret = rtc_arm_read_alarm(ops, &alrm);
 		if (ret)
 			break;
 		ret = copy_to_user(uarg, &alrm, sizeof(alrm));
@@ -425,7 +342,7 @@ static int rtc_read_proc(char *page, cha
 	struct rtc_time tm;
 	char *p = page;
 
-	if (rtc_read_time(ops, &tm) == 0) {
+	if (rtc_arm_read_time(ops, &tm) == 0) {
 		p += sprintf(p,
 			"rtc_time\t: %02d:%02d:%02d\n"
 			"rtc_date\t: %04d-%02d-%02d\n"
@@ -435,7 +352,7 @@ static int rtc_read_proc(char *page, cha
 			rtc_epoch);
 	}
 
-	if (rtc_read_alarm(ops, &alrm) == 0) {
+	if (rtc_arm_read_alarm(ops, &alrm) == 0) {
 		p += sprintf(p, "alrm_time\t: ");
 		if ((unsigned int)alrm.time.tm_hour <= 24)
 			p += sprintf(p, "%02d:", alrm.time.tm_hour);
--- linux-nslu2.orig/include/asm-arm/rtc.h	2006-01-04 01:27:04.000000000 +0100
+++ linux-nslu2/include/asm-arm/rtc.h	2006-01-04 01:27:09.000000000 +0100
@@ -25,9 +25,6 @@ struct rtc_ops {
 	int		(*proc)(char *buf);
 };
 
-void rtc_time_to_tm(unsigned long, struct rtc_time *);
-int rtc_tm_to_time(struct rtc_time *, unsigned long *);
-int rtc_valid_tm(struct rtc_time *);
 void rtc_next_alarm_time(struct rtc_time *, struct rtc_time *, struct rtc_time *);
 void rtc_update(unsigned long, unsigned long);
 int register_rtc(struct rtc_ops *);
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-sysfs.c	2006-01-04 01:27:12.000000000 +0100
@@ -0,0 +1,125 @@
+/*
+ * RTC subsystem, sysfs interface
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+
+/* device attributes */
+
+static ssize_t rtc_sysfs_show_name(struct class_device *dev, char *buf)
+{
+	return sprintf(buf, "%s\n", to_rtc_device(dev)->name);
+}
+static CLASS_DEVICE_ATTR(name, S_IRUGO, rtc_sysfs_show_name, NULL);
+
+static ssize_t rtc_sysfs_show_date(struct class_device *dev, char *buf)
+{
+	ssize_t retval = 0;
+	struct rtc_device *rtc = to_rtc_device(dev);
+	struct rtc_time tm;
+
+	if (down_read_trylock(&rtc->lock) == 0)
+		return -ENODEV;
+
+	if (rtc_read_time(dev, &tm) == 0) {
+		retval = sprintf(buf, "%04d-%02d-%02d\n",
+			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
+	}
+
+	up_read(&rtc->lock);
+	return retval;
+}
+static CLASS_DEVICE_ATTR(date, S_IRUGO, rtc_sysfs_show_date, NULL);
+
+static ssize_t rtc_sysfs_show_time(struct class_device *dev, char *buf)
+{
+	ssize_t retval = 0;
+	struct rtc_device *rtc = to_rtc_device(dev);
+	struct rtc_time tm;
+
+	if (down_read_trylock(&rtc->lock) == 0)
+		return -ENODEV;
+
+	if (rtc_read_time(dev, &tm) == 0) {
+		retval = sprintf(buf, "%02d:%02d:%02d\n",
+			tm.tm_hour, tm.tm_min, tm.tm_sec);
+	}
+
+	up_read(&rtc->lock);
+	return retval;
+}
+static CLASS_DEVICE_ATTR(time, S_IRUGO, rtc_sysfs_show_time, NULL);
+
+static ssize_t rtc_sysfs_show_since_epoch(struct class_device *dev, char *buf)
+{
+	ssize_t retval = 0;
+	struct rtc_device *rtc = to_rtc_device(dev);
+	struct rtc_time tm;
+
+	if (down_read_trylock(&rtc->lock) == 0)
+		return -ENODEV;
+
+	if (rtc_read_time(dev, &tm) == 0) {
+		unsigned long time;
+		rtc_tm_to_time(&tm, &time);
+		retval = sprintf(buf, "%lu\n", time);
+	}
+
+	up_read(&rtc->lock);
+	return retval;
+}
+static CLASS_DEVICE_ATTR(since_epoch, S_IRUGO, rtc_sysfs_show_since_epoch, NULL);
+
+/* insertion/removal hooks */
+
+static int __devinit rtc_sysfs_add_device(struct class_device *class_dev,
+					   struct class_interface *class_intf)
+{
+	class_device_create_file(class_dev, &class_device_attr_name);
+	class_device_create_file(class_dev, &class_device_attr_date);
+	class_device_create_file(class_dev, &class_device_attr_time);
+	class_device_create_file(class_dev, &class_device_attr_since_epoch);
+	dev_info(class_dev->dev, "rtc intf: sysfs\n");
+	return 0;
+}
+
+static void rtc_sysfs_remove_device(struct class_device *class_dev,
+				      struct class_interface *class_intf)
+{
+	class_device_remove_file(class_dev, &class_device_attr_name);
+	class_device_remove_file(class_dev, &class_device_attr_date);
+	class_device_remove_file(class_dev, &class_device_attr_time);
+	class_device_remove_file(class_dev, &class_device_attr_since_epoch);
+}
+
+/* interface registration */
+
+struct class_interface rtc_sysfs_interface = {
+	.add = &rtc_sysfs_add_device,
+	.remove = &rtc_sysfs_remove_device,
+};
+
+static int __init rtc_sysfs_init(void)
+{
+	return rtc_interface_register(&rtc_sysfs_interface);
+}
+
+static void __exit rtc_sysfs_exit(void)
+{
+	class_interface_unregister(&rtc_sysfs_interface);
+}
+
+module_init(rtc_sysfs_init);
+module_exit(rtc_sysfs_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("RTC class sysfs interface");
+MODULE_LICENSE("GPL");
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-proc.c	2006-01-04 01:27:14.000000000 +0100
@@ -0,0 +1,158 @@
+/*
+ * RTC subsystem, proc interface
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based on arch/arm/common/rtctime.c
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static struct class_device *rtc_dev = NULL;
+static DECLARE_MUTEX(rtc_sem);
+
+static int rtc_proc_show(struct seq_file *seq, void *offset)
+{
+	struct class_device *class_dev = seq->private;
+	struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
+	struct rtc_wkalrm alrm;
+	struct rtc_time tm;
+
+	if (rtc_read_time(class_dev, &tm) == 0) {
+		seq_printf(seq,
+			"rtc_time\t: %02d:%02d:%02d\n"
+			"rtc_date\t: %04d-%02d-%02d\n",
+			tm.tm_hour, tm.tm_min, tm.tm_sec,
+			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
+	}
+
+	if (rtc_read_alarm(class_dev, &alrm) == 0) {
+		seq_printf(seq, "alrm_time\t: ");
+		if ((unsigned int)alrm.time.tm_hour <= 24)
+			seq_printf(seq, "%02d:", alrm.time.tm_hour);
+		else
+			seq_printf(seq, "**:");
+		if ((unsigned int)alrm.time.tm_min <= 59)
+			seq_printf(seq, "%02d:", alrm.time.tm_min);
+		else
+			seq_printf(seq, "**:");
+		if ((unsigned int)alrm.time.tm_sec <= 59)
+			seq_printf(seq, "%02d\n", alrm.time.tm_sec);
+		else
+			seq_printf(seq, "**\n");
+
+		seq_printf(seq, "alrm_date\t: ");
+		if ((unsigned int)alrm.time.tm_year <= 200)
+			seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
+		else
+			seq_printf(seq, "****-");
+		if ((unsigned int)alrm.time.tm_mon <= 11)
+			seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
+		else
+			seq_printf(seq, "**-");
+		if ((unsigned int)alrm.time.tm_mday <= 31)
+			seq_printf(seq, "%02d\n", alrm.time.tm_mday);
+		else
+			seq_printf(seq, "**\n");
+		seq_printf(seq, "alrm_wakeup\t: %s\n",
+			     alrm.enabled ? "yes" : "no");
+		seq_printf(seq, "alrm_pending\t: %s\n",
+			     alrm.pending ? "yes" : "no");
+	}
+
+	if (ops->proc)
+		ops->proc(class_dev->dev, seq);
+
+	return 0;
+}
+
+static int rtc_proc_open(struct inode *inode, struct file *file)
+{
+	struct class_device *class_dev = PDE(inode)->data;
+
+	if (!try_module_get(THIS_MODULE))
+		return -ENODEV;
+
+	return single_open(file, rtc_proc_show, class_dev);
+}
+
+static int rtc_proc_release(struct inode *inode, struct file *file)
+{
+	int res = single_release(inode, file);
+	module_put(THIS_MODULE);
+	return res;
+}
+
+static struct file_operations rtc_proc_fops = {
+	.open		= rtc_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= rtc_proc_release,
+};
+
+static int rtc_proc_add_device(struct class_device *class_dev,
+					   struct class_interface *class_intf)
+{
+	down(&rtc_sem);
+	if (rtc_dev == NULL) {
+		struct proc_dir_entry *ent;
+
+		rtc_dev = class_dev;
+
+		if ((ent = create_proc_entry("driver/rtc", 0, NULL))) {
+			struct rtc_device *rtc = to_rtc_device(class_dev);
+
+			ent->proc_fops = &rtc_proc_fops;
+			ent->owner = rtc->owner;
+			ent->data = class_dev;
+
+			dev_info(class_dev->dev, "rtc intf: proc\n");
+		}
+		else
+			rtc_dev = NULL;
+	}
+	up(&rtc_sem);
+
+	return 0;
+}
+
+static void rtc_proc_remove_device(struct class_device *class_dev,
+					      struct class_interface *class_intf)
+{
+	down(&rtc_sem);
+	if (rtc_dev == class_dev) {
+		remove_proc_entry("driver/rtc", NULL);
+		rtc_dev = NULL;
+	}
+	up(&rtc_sem);
+}
+
+struct class_interface rtc_proc_interface = {
+	.add = &rtc_proc_add_device,
+	.remove = &rtc_proc_remove_device,
+};
+
+static int __init rtc_proc_init(void)
+{
+	return rtc_interface_register(&rtc_proc_interface);
+}
+
+static void __exit rtc_proc_exit(void)
+{
+	class_interface_unregister(&rtc_proc_interface);
+}
+
+module_init(rtc_proc_init);
+module_exit(rtc_proc_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("RTC class proc interface");
+MODULE_LICENSE("GPL");
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-dev.c	2006-01-04 01:27:15.000000000 +0100
@@ -0,0 +1,372 @@
+/*
+ * RTC subsystem, dev interface
+ *
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based on arch/arm/common/rtctime.c
+ *
+ * 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; version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+
+static dev_t rtc_devt;
+
+#define RTC_DEV_MAX 16 /* 16 RTCs should be enough for everyone... */
+
+static int rtc_dev_open(struct inode *inode, struct file *file)
+{
+	int err;
+	struct rtc_device *rtc = container_of(inode->i_cdev,
+					struct rtc_device, char_dev);
+	struct rtc_class_ops *ops = rtc->ops;
+
+	/* We keep the lock as long as the device is in use
+	 * and return immediately if busy
+	 */
+	if (down_trylock(&rtc->char_sem))
+		return -EBUSY;
+
+	file->private_data = &rtc->class_dev;
+
+	err = ops->open ? ops->open(rtc->class_dev.dev) : 0;
+	if (err == 0) {
+
+		spin_lock_irq(&rtc->irq_lock);
+		rtc->irq_data = 0;
+		spin_unlock_irq(&rtc->irq_lock);
+
+		return 0;
+	}
+
+	/* something has gone wrong, release the lock */
+	up(&rtc->char_sem);
+	return err;
+}
+
+
+static ssize_t
+rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+{
+	struct rtc_device *rtc = to_rtc_device(file->private_data);
+
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long data;
+	ssize_t ret;
+
+	if (count < sizeof(unsigned long))
+		return -EINVAL;
+
+	add_wait_queue(&rtc->irq_queue, &wait);
+	do {
+		__set_current_state(TASK_INTERRUPTIBLE);
+
+		spin_lock_irq(&rtc->irq_lock);
+		data = rtc->irq_data;
+		rtc->irq_data = 0;
+		spin_unlock_irq(&rtc->irq_lock);
+
+		if (data != 0) {
+			ret = 0;
+			break;
+		}
+		if (file->f_flags & O_NONBLOCK) {
+			ret = -EAGAIN;
+			break;
+		}
+		if (signal_pending(current)) {
+			ret = -ERESTARTSYS;
+			break;
+		}
+		schedule();
+	} while (1);
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&rtc->irq_queue, &wait);
+
+	if (ret == 0) {
+		ret = put_user(data, (unsigned long __user *)buf);
+		if (ret == 0)
+			ret = sizeof(unsigned long);
+	}
+	return ret;
+}
+
+static unsigned int rtc_dev_poll(struct file *file, poll_table *wait)
+{
+	struct rtc_device *rtc = to_rtc_device(file->private_data);
+	unsigned long data;
+
+	poll_wait(file, &rtc->irq_queue, wait);
+
+	spin_lock_irq(&rtc->irq_lock);
+	data = rtc->irq_data;
+	spin_unlock_irq(&rtc->irq_lock);
+
+	return data != 0 ? POLLIN | POLLRDNORM : 0;
+}
+
+static int rtc_dev_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+		     unsigned long arg)
+{
+	int err = 0;
+	struct class_device *class_dev = file->private_data;
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+	struct rtc_class_ops *ops = rtc->ops;
+	struct rtc_time tm;
+	struct rtc_wkalrm alarm;
+	void __user *uarg = (void __user *) arg;
+
+	/* avoid conflicting IRQ users */
+	if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) {
+		spin_lock(&rtc->irq_task_lock);
+		if (rtc->irq_task)
+			err = -EBUSY;
+		spin_unlock(&rtc->irq_task_lock);
+
+		if (err < 0)
+			return err;
+	}
+
+	/* try the driver's ioctl interface */
+	if (ops->ioctl) {
+		err = ops->ioctl(class_dev->dev, cmd, arg);
+		if (err < 0 && err != -EINVAL)
+			return err;
+	}
+
+	/* if the driver does not provide the ioctl interface
+	 * or if that particular ioctl was not implemented
+	 * (-EINVAL), we will try to emulate here.
+	 */
+
+	switch (cmd) {
+	case RTC_ALM_READ:
+		if ((err = rtc_read_alarm(class_dev, &alarm)) < 0)
+			return err;
+
+		if ((err = copy_to_user(uarg, &alarm.time, sizeof(tm))))
+			return -EFAULT;
+		break;
+
+	case RTC_ALM_SET:
+		if ((err = copy_from_user(&alarm.time, uarg, sizeof(tm))))
+			return -EFAULT;
+
+		alarm.enabled = 0;
+		alarm.pending = 0;
+		alarm.time.tm_mday = -1;
+		alarm.time.tm_mon = -1;
+		alarm.time.tm_year = -1;
+		alarm.time.tm_wday = -1;
+		alarm.time.tm_yday = -1;
+		alarm.time.tm_isdst = -1;
+		err = rtc_set_alarm(class_dev, &alarm);
+		break;
+
+	case RTC_RD_TIME:
+		if ((err = rtc_read_time(class_dev, &tm)) < 0)
+			return err;
+
+		if ((err = copy_to_user(uarg, &tm, sizeof(tm))))
+			return -EFAULT;
+		break;
+
+	case RTC_SET_TIME:
+		if (!capable(CAP_SYS_TIME))
+			return -EACCES;
+
+		if ((err = copy_from_user(&tm, uarg, sizeof(tm))))
+			return -EFAULT;
+
+		err = rtc_set_time(class_dev, &tm);
+		break;
+#if 0
+	case RTC_EPOCH_SET:
+#ifndef rtc_epoch
+		/*
+		 * There were no RTC clocks before 1900.
+		 */
+		if (arg < 1900) {
+			err = -EINVAL;
+			break;
+		}
+		if (!capable(CAP_SYS_TIME)) {
+			err = -EACCES;
+			break;
+		}
+		rtc_epoch = arg;
+		err = 0;
+#endif
+		break;
+
+	case RTC_EPOCH_READ:
+		err = put_user(rtc_epoch, (unsigned long __user *)uarg);
+		break;
+#endif
+	case RTC_WKALM_SET:
+		if ((err = copy_from_user(&alarm, uarg, sizeof(alarm))))
+			return -EFAULT;
+
+		err = rtc_set_alarm(class_dev, &alarm);
+		break;
+
+	case RTC_WKALM_RD:
+		if ((err = rtc_read_alarm(class_dev, &alarm)) < 0)
+			return err;
+
+		if ((err = copy_to_user(uarg, &alarm, sizeof(alarm))))
+			return -EFAULT;
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+	return err;
+}
+
+static int rtc_dev_release(struct inode *inode, struct file *file)
+{
+	struct rtc_device *rtc = to_rtc_device(file->private_data);
+
+	if (rtc->ops->release)
+		rtc->ops->release(rtc->class_dev.dev);
+
+	spin_lock_irq(&rtc->irq_lock);
+	rtc->irq_data = 0;
+	spin_unlock_irq(&rtc->irq_lock);
+
+	up(&rtc->char_sem);
+	return 0;
+}
+
+static int rtc_dev_fasync(int fd, struct file *file, int on)
+{
+	struct rtc_device *rtc = to_rtc_device(file->private_data);
+	return fasync_helper(fd, file, on, &rtc->async_queue);
+}
+
+static struct file_operations rtc_dev_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.read		= rtc_dev_read,
+	.poll		= rtc_dev_poll,
+	.ioctl		= rtc_dev_ioctl,
+	.open		= rtc_dev_open,
+	.release	= rtc_dev_release,
+	.fasync		= rtc_dev_fasync,
+};
+
+static ssize_t rtc_dev_show_dev(struct class_device *class_dev, char *buf)
+{
+        return print_dev_t(buf, class_dev->devt);
+}
+static CLASS_DEVICE_ATTR(dev, S_IRUGO, rtc_dev_show_dev, NULL);
+
+/* insertion/removal hooks */
+
+static int rtc_dev_add_device(struct class_device *class_dev,
+				struct class_interface *class_intf)
+{
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	if (rtc->id >= RTC_DEV_MAX) {
+		dev_err(class_dev->dev, "too many RTCs\n");
+		return -EINVAL;
+	}
+
+	init_MUTEX(&rtc->char_sem);
+	spin_lock_init(&rtc->irq_lock);
+	init_waitqueue_head(&rtc->irq_queue);
+
+	cdev_init(&rtc->char_dev, &rtc_dev_fops);
+	rtc->char_dev.owner = rtc->owner;
+	class_dev->devt = MKDEV(MAJOR(rtc_devt), rtc->id);
+
+	if (cdev_add(&rtc->char_dev, class_dev->devt, 1)) {
+		cdev_del(&rtc->char_dev);
+
+		dev_err(class_dev->dev,
+			"failed to add char device %d:%d\n",
+			MAJOR(class_dev->devt),
+			MINOR(class_dev->devt));
+
+		class_dev->devt = MKDEV(0, 0);
+		return -ENODEV;
+	}
+
+	class_device_create_file(class_dev, &class_device_attr_dev);
+
+	dev_info(class_dev->dev, "rtc intf: dev (%d:%d)\n",
+		MAJOR(class_dev->devt),
+		MINOR(class_dev->devt));
+
+	kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
+
+	return 0;
+}
+
+static void rtc_dev_remove_device(struct class_device *class_dev,
+					struct class_interface *class_intf)
+{
+	struct rtc_device *rtc = to_rtc_device(class_dev);
+
+	class_device_remove_file(class_dev, &class_device_attr_dev);
+
+	if (MAJOR(class_dev->devt)) {
+		dev_dbg(class_dev->dev, "removing char %d:%d\n",
+			MAJOR(class_dev->devt),
+			MINOR(class_dev->devt));
+		cdev_del(&rtc->char_dev);
+
+		kobject_hotplug(&class_dev->kobj, KOBJ_REMOVE);
+
+		class_dev->devt = MKDEV(0, 0);
+	}
+}
+
+/* interface registration */
+
+struct class_interface rtc_dev_interface = {
+	.add = &rtc_dev_add_device,
+	.remove = &rtc_dev_remove_device,
+};
+
+static int __init rtc_dev_init(void)
+{
+	int err;
+
+	if ((err = alloc_chrdev_region(&rtc_devt, 0, RTC_DEV_MAX, "rtc")) < 0) {
+		printk(KERN_ERR "%s: failed to allocate char dev region\n",
+			__FILE__);
+		return err;
+	}
+
+	if ((err = rtc_interface_register(&rtc_dev_interface)) < 0) {
+		printk(KERN_ERR "%s: failed to register the interface\n",
+			__FILE__);
+		unregister_chrdev_region(rtc_devt, RTC_DEV_MAX);
+		return err;
+	}
+
+	return 0;
+}
+
+static void __exit rtc_dev_exit(void)
+{
+	class_interface_unregister(&rtc_dev_interface);
+
+	unregister_chrdev_region(rtc_devt, RTC_DEV_MAX);
+}
+
+module_init(rtc_dev_init);
+module_exit(rtc_dev_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("RTC class dev interface");
+MODULE_LICENSE("GPL");
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-x1205.c	2006-01-04 01:27:17.000000000 +0100
@@ -0,0 +1,725 @@
+/*
+ * An i2c driver for the Xicor/Intersil X1205 RTC
+ * Copyright 2004 Karen Spearel
+ * Copyright 2005 Alessandro Zummo
+ *
+ * please send all reports to:
+ *	kas11 at tampabay dot rr dot com
+ *	a dot zummo at towertech dot it
+ *
+ * based on a lot of other RTC drivers.
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/string.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+
+#define DRV_VERSION "1.0.5"
+
+/* Addresses to scan: none. This chip is located at
+ * 0x6f and uses a two bytes register addressing.
+ * Two bytes need to be written to read a single register,
+ * while most other chips just require one and take the second
+ * one as the data to be written. To prevent corrupting
+ * unknown chips, the user must explicitely set the probe parameter.
+ */
+
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD;
+I2C_CLIENT_MODULE_PARM(hctosys,
+	"Set the system time from the hardware clock upon initialization");
+
+/* offsets into CCR area */
+
+#define CCR_SEC			0
+#define CCR_MIN			1
+#define CCR_HOUR		2
+#define CCR_MDAY		3
+#define CCR_MONTH		4
+#define CCR_YEAR		5
+#define CCR_WDAY		6
+#define CCR_Y2K			7
+
+#define X1205_REG_SR		0x3F	/* status register */
+#define X1205_REG_Y2K		0x37
+#define X1205_REG_DW		0x36
+#define X1205_REG_YR		0x35
+#define X1205_REG_MO		0x34
+#define X1205_REG_DT		0x33
+#define X1205_REG_HR		0x32
+#define X1205_REG_MN		0x31
+#define X1205_REG_SC		0x30
+#define X1205_REG_DTR		0x13
+#define X1205_REG_ATR		0x12
+#define X1205_REG_INT		0x11
+#define X1205_REG_0		0x10
+#define X1205_REG_Y2K1		0x0F
+#define X1205_REG_DWA1		0x0E
+#define X1205_REG_YRA1		0x0D
+#define X1205_REG_MOA1		0x0C
+#define X1205_REG_DTA1		0x0B
+#define X1205_REG_HRA1		0x0A
+#define X1205_REG_MNA1		0x09
+#define X1205_REG_SCA1		0x08
+#define X1205_REG_Y2K0		0x07
+#define X1205_REG_DWA0		0x06
+#define X1205_REG_YRA0		0x05
+#define X1205_REG_MOA0		0x04
+#define X1205_REG_DTA0		0x03
+#define X1205_REG_HRA0		0x02
+#define X1205_REG_MNA0		0x01
+#define X1205_REG_SCA0		0x00
+
+#define X1205_CCR_BASE		0x30	/* Base address of CCR */
+#define X1205_ALM0_BASE		0x00	/* Base address of ALARM0 */
+
+#define X1205_SR_RTCF		0x01	/* Clock failure */
+#define X1205_SR_WEL		0x02	/* Write Enable Latch */
+#define X1205_SR_RWEL		0x04	/* Register Write Enable */
+
+#define X1205_DTR_DTR0		0x01
+#define X1205_DTR_DTR1		0x02
+#define X1205_DTR_DTR2		0x04
+
+#define X1205_HR_MIL		0x80	/* Set in ccr.hour for 24 hr mode */
+
+/* Prototypes */
+static int x1205_attach(struct i2c_adapter *adapter);
+static int x1205_detach(struct i2c_client *client);
+static int x1205_probe(struct i2c_adapter *adapter, int address, int kind);
+
+static struct i2c_driver x1205_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "x1205",
+	.flags		= I2C_DF_NOTIFY,
+	.attach_adapter = &x1205_attach,
+	.detach_client	= &x1205_detach,
+};
+
+/*
+ * In the routines that deal directly with the x1205 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch
+ * Epoch is initialized as 2000. Time is set to UTC.
+ */
+static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm,
+				unsigned char reg_base)
+{
+	unsigned char dt_addr[2] = { 0, reg_base };
+
+	unsigned char buf[8];
+
+	struct i2c_msg msgs[] = {
+		{ client->addr, 0, 2, dt_addr },	/* setup read ptr */
+		{ client->addr, I2C_M_RD, 8, buf },	/* read date */
+	};
+
+	/* read date registers */
+	if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
+		return -EIO;
+	}
+
+	dev_dbg(&client->dev,
+		"%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
+		"mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
+		__FUNCTION__,
+		buf[0], buf[1], buf[2], buf[3],
+		buf[4], buf[5], buf[6], buf[7]);
+
+	tm->tm_sec = BCD2BIN(buf[CCR_SEC]);
+	tm->tm_min = BCD2BIN(buf[CCR_MIN]);
+	tm->tm_hour = BCD2BIN(buf[CCR_HOUR] & 0x3F); /* hr is 0-23 */
+	tm->tm_mday = BCD2BIN(buf[CCR_MDAY]);
+	tm->tm_mon = BCD2BIN(buf[CCR_MONTH]) - 1; /* mon is 0-11 */
+	tm->tm_year = BCD2BIN(buf[CCR_YEAR])
+			+ (BCD2BIN(buf[CCR_Y2K]) * 100) - 1900;
+	tm->tm_wday = buf[CCR_WDAY];
+
+	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
+		"mday=%d, mon=%d, year=%d, wday=%d\n",
+		__FUNCTION__,
+		tm->tm_sec, tm->tm_min, tm->tm_hour,
+		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+	return 0;
+}
+
+static int x1205_get_status(struct i2c_client *client, unsigned char *sr)
+{
+	static unsigned char sr_addr[2] = { 0, X1205_REG_SR };
+
+	struct i2c_msg msgs[] = {
+		{ client->addr, 0, 2, sr_addr },	/* setup read ptr */
+		{ client->addr, I2C_M_RD, 1, sr },	/* read status */
+	};
+
+	/* read status register */
+	if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm,
+				int datetoo, u8 reg_base)
+{
+	int i, xfer;
+	unsigned char buf[8];
+
+	static const unsigned char wel[3] = { 0, X1205_REG_SR,
+						X1205_SR_WEL };
+
+	static const unsigned char rwel[3] = { 0, X1205_REG_SR,
+						X1205_SR_WEL | X1205_SR_RWEL };
+
+	static const unsigned char diswe[3] = { 0, X1205_REG_SR, 0 };
+
+	dev_dbg(&client->dev,
+		"%s: secs=%d, mins=%d, hours=%d\n",
+		__FUNCTION__,
+		tm->tm_sec, tm->tm_min, tm->tm_hour);
+
+	buf[CCR_SEC] = BIN2BCD(tm->tm_sec);
+	buf[CCR_MIN] = BIN2BCD(tm->tm_min);
+
+	/* set hour and 24hr bit */
+	buf[CCR_HOUR] = BIN2BCD(tm->tm_hour) | X1205_HR_MIL;
+
+	/* should we also set the date? */
+	if (datetoo) {
+		dev_dbg(&client->dev,
+			"%s: mday=%d, mon=%d, year=%d, wday=%d\n",
+			__FUNCTION__,
+			tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+		buf[CCR_MDAY] = BIN2BCD(tm->tm_mday);
+
+		/* month, 1 - 12 */
+		buf[CCR_MONTH] = BIN2BCD(tm->tm_mon + 1);
+
+		/* year, since the rtc epoch*/
+		buf[CCR_YEAR] = BIN2BCD(tm->tm_year % 100);
+		buf[CCR_WDAY] = tm->tm_wday & 0x07;
+		buf[CCR_Y2K] = BIN2BCD(tm->tm_year / 100);
+	}
+
+	/* this sequence is required to unlock the chip */
+	xfer = i2c_master_send(client, wel, 3);
+	if (xfer != 3) {
+		dev_err(&client->dev, "%s: wel - %d\n", __FUNCTION__, xfer);
+		return -EIO;
+	}
+
+	xfer = i2c_master_send(client, rwel, 3);
+	if (xfer != 3) {
+		dev_err(&client->dev, "%s: rwel - %d\n", __FUNCTION__, xfer);
+		return -EIO;
+	}
+
+	/* write register's data */
+	for (i = 0; i < (datetoo ? 8 : 3); i++) {
+		unsigned char rdata[3] = { 0, reg_base + i, buf[i] };
+
+		xfer = i2c_master_send(client, rdata, 3);
+		if (xfer != 3) {
+			dev_err(&client->dev,
+				"%s: xfer=%d addr=%02x, data=%02x\n",
+				__FUNCTION__,
+				 xfer, rdata[1], rdata[2]);
+			return -EIO;
+		}
+	};
+
+	/* disable further writes */
+	xfer = i2c_master_send(client, diswe, 3);
+	if (xfer != 3) {
+		dev_err(&client->dev, "%s: diswe - %d\n", __FUNCTION__, xfer);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int x1205_fix_osc(struct i2c_client *client)
+{
+	int err;
+	struct rtc_time tm;
+
+	tm.tm_hour = 0;
+	tm.tm_min = 0;
+	tm.tm_sec = 0;
+
+	if ((err = x1205_set_datetime(client, &tm, 0, X1205_CCR_BASE)) < 0)
+		dev_err(&client->dev,
+			"unable to restart the clock\n");
+
+	return err;
+}
+
+static int x1205_get_dtrim(struct i2c_client *client, int *trim)
+{
+	unsigned char dtr;
+	static unsigned char dtr_addr[2] = { 0, X1205_REG_DTR };
+
+	struct i2c_msg msgs[] = {
+		{ client->addr, 0, 2, dtr_addr },	/* setup read ptr */
+		{ client->addr, I2C_M_RD, 1, &dtr }, 	/* read dtr */
+	};
+
+	/* read dtr register */
+	if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
+		return -EIO;
+	}
+
+	dev_dbg(&client->dev, "%s: raw dtr=%x\n", __FUNCTION__, dtr);
+
+	*trim = 0;
+
+	if (dtr & X1205_DTR_DTR0)
+		*trim += 20;
+
+	if (dtr & X1205_DTR_DTR1)
+		*trim += 10;
+
+	if (dtr & X1205_DTR_DTR2)
+		*trim = -*trim;
+
+	return 0;
+}
+
+static int x1205_get_atrim(struct i2c_client *client, int *trim)
+{
+	s8 atr;
+	static unsigned char atr_addr[2] = { 0, X1205_REG_ATR };
+
+	struct i2c_msg msgs[] = {
+		{ client->addr, 0, 2, atr_addr },	/* setup read ptr */
+		{ client->addr, I2C_M_RD, 1, &atr }, 	/* read atr */
+	};
+
+	/* read atr register */
+	if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
+		return -EIO;
+	}
+
+	dev_dbg(&client->dev, "%s: raw atr=%x\n", __FUNCTION__, atr);
+
+	/* atr is a two's complement value on 6 bits,
+	 * perform sign extension. The formula is
+	 * Catr = (atr * 0.25pF) + 11.00pF.
+	 */
+	if (atr & 0x20)
+		atr |= 0xC0;
+
+	dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __FUNCTION__, atr, atr);
+
+	*trim = (atr * 250) + 11000;
+
+	dev_dbg(&client->dev, "%s: real=%d\n", __FUNCTION__, *trim);
+
+	return 0;
+}
+
+static int x1205_hctosys(struct i2c_client *client)
+{
+	int err;
+
+	struct rtc_time tm;
+	struct timespec tv;
+	unsigned char sr;
+
+	if ((err = x1205_get_status(client, &sr)) < 0)
+		return err;
+
+	/* Don't set if we had a power failure */
+	if (sr & X1205_SR_RTCF)
+		return -EINVAL;
+
+	if ((err = x1205_get_datetime(client, &tm, X1205_CCR_BASE)) < 0)
+		return err;
+
+	/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary
+	 * whether it stores the most close value or the value with partial
+	 * seconds truncated. However, it is important that we use it to store
+	 * the truncated value. This is because otherwise it is necessary,
+	 * in an rtc sync function, to read both xtime.tv_sec and
+	 * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
+	 * of >32bits is not possible. So storing the most close value would
+	 * slow down the sync API. So here we have the truncated value and
+	 * the best guess is to add 0.5s.
+	 */
+
+	tv.tv_nsec = NSEC_PER_SEC >> 1;
+
+	rtc_tm_to_time(&tm, &tv.tv_sec);
+
+	do_settimeofday(&tv);
+
+	dev_info(&client->dev,
+		"setting the system clock to %d-%d-%d %d:%d:%d\n",
+		tm.tm_year + 1900, tm.tm_mon + 1,
+		tm.tm_mday, tm.tm_hour, tm.tm_min,
+		tm.tm_sec);
+
+	return 0;
+}
+
+struct x1205_limit
+{
+	unsigned char reg;
+	unsigned char mask;
+	unsigned char min;
+	unsigned char max;
+};
+
+static int x1205_validate_client(struct i2c_client *client)
+{
+	int i, xfer;
+
+	/* Probe array. We will read the register at the specified
+	 * address and check if the given bits are zero.
+	 */
+	static const unsigned char probe_zero_pattern[] = {
+		/* register, mask */
+		X1205_REG_SR,	0x18,
+		X1205_REG_DTR,	0xF8,
+		X1205_REG_ATR,	0xC0,
+		X1205_REG_INT,	0x18,
+		X1205_REG_0,	0xFF,
+	};
+
+	static const struct x1205_limit probe_limits_pattern[] = {
+		/* register, mask, min, max */
+		{ X1205_REG_Y2K,	0xFF,	19,	20	},
+		{ X1205_REG_DW,		0xFF,	0,	6	},
+		{ X1205_REG_YR,		0xFF,	0,	99	},
+		{ X1205_REG_MO,		0xFF,	0,	12	},
+		{ X1205_REG_DT,		0xFF,	0,	31	},
+		{ X1205_REG_HR,		0x7F,	0,	23	},
+		{ X1205_REG_MN,		0xFF,	0,	59	},
+		{ X1205_REG_SC,		0xFF,	0,	59	},
+		{ X1205_REG_Y2K1,	0xFF,	19,	20	},
+		{ X1205_REG_Y2K0,	0xFF,	19,	20	},
+	};
+
+	/* check that registers have bits a 0 where expected */
+	for (i = 0; i < ARRAY_SIZE(probe_zero_pattern); i += 2) {
+		unsigned char buf;
+
+		unsigned char addr[2] = { 0, probe_zero_pattern[i] };
+
+		struct i2c_msg msgs[2] = {
+			{ client->addr, 0, 2, addr },
+			{ client->addr, I2C_M_RD, 1, &buf },
+		};
+
+		xfer = i2c_transfer(client->adapter, msgs, 2);
+		if (xfer != 2) {
+			dev_err(&client->adapter->dev,
+				"%s: could not read register %x\n",
+				__FUNCTION__, addr[1]);
+
+			return -EIO;
+		}
+
+		if ((buf & probe_zero_pattern[i+1]) != 0) {
+			dev_err(&client->adapter->dev,
+				"%s: register=%02x, zero pattern=%d, value=%x\n",
+				__FUNCTION__, addr[1], i, buf);
+
+			return -ENODEV;
+		}
+	}
+
+	/* check limits (only registers with bcd values) */
+	for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) {
+		unsigned char reg, value;
+
+		unsigned char addr[2] = { 0, probe_limits_pattern[i].reg };
+
+		struct i2c_msg msgs[2] = {
+			{ client->addr, 0, 2, addr },
+			{ client->addr, I2C_M_RD, 1, &reg },
+		};
+
+		xfer = i2c_transfer(client->adapter, msgs, 2);
+
+		if (xfer != 2) {
+			dev_err(&client->adapter->dev,
+				"%s: could not read register %x\n",
+				__FUNCTION__, addr[1]);
+
+			return -EIO;
+		}
+
+		value = BCD2BIN(reg & probe_limits_pattern[i].mask);
+
+		if (value > probe_limits_pattern[i].max ||
+			value < probe_limits_pattern[i].min) {
+			dev_dbg(&client->adapter->dev,
+				"%s: register=%x, lim pattern=%d, value=%d\n",
+				__FUNCTION__, addr[1], i, value);
+
+			return -ENODEV;
+		}
+	}
+
+	return 0;
+}
+
+static int x1205_rtc_read_alarm(struct device *dev,
+	struct rtc_wkalrm *alrm)
+{
+	return x1205_get_datetime(to_i2c_client(dev),
+		&alrm->time, X1205_ALM0_BASE);
+}
+
+static int x1205_rtc_set_alarm(struct device *dev,
+	struct rtc_wkalrm *alrm)
+{
+	return x1205_set_datetime(to_i2c_client(dev),
+		&alrm->time, 1, X1205_ALM0_BASE);
+}
+
+static int x1205_rtc_read_time(struct device *dev,
+	struct rtc_time *tm)
+{
+	return x1205_get_datetime(to_i2c_client(dev),
+		tm, X1205_CCR_BASE);
+}
+
+static int x1205_rtc_set_time(struct device *dev,
+	struct rtc_time *tm)
+{
+	return x1205_set_datetime(to_i2c_client(dev),
+		tm, 1, X1205_CCR_BASE);
+}
+
+static int x1205_rtc_set_mmss(struct device *dev, unsigned long secs)
+{
+	int err;
+
+	struct rtc_time new_tm, old_tm;
+
+	if ((err = x1205_rtc_read_time(dev, &old_tm) == 0))
+		return err;
+
+	/* FIXME      xtime.tv_nsec = old_tm.tm_sec * 10000000; */
+	new_tm.tm_sec  = secs % 60;
+	secs /= 60;
+	new_tm.tm_min  = secs % 60;
+	secs /= 60;
+	new_tm.tm_hour = 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 x1205_rtc_set_time(dev, &new_tm);
+}
+
+static int x1205_rtc_proc(struct device *dev, struct seq_file *seq)
+{
+	int err, dtrim, atrim;
+
+	seq_printf(seq, "24hr\t\t: yes\n");
+
+	err = x1205_get_dtrim(to_i2c_client(dev), &dtrim);
+	if (err == 0)
+		seq_printf(seq, "digital_trim\t: %d ppm\n", dtrim);
+
+	err = x1205_get_atrim(to_i2c_client(dev), &atrim);
+	if (err == 0)
+		seq_printf(seq, "analog_trim\t: %d.%02d pF\n",
+			atrim / 1000, atrim % 1000);
+	return 0;
+}
+
+static struct rtc_class_ops x1205_rtc_ops = {
+	.proc = x1205_rtc_proc,
+	.read_time = x1205_rtc_read_time,
+	.set_time = x1205_rtc_set_time,
+	.read_alarm = x1205_rtc_read_alarm,
+	.set_alarm = x1205_rtc_set_alarm,
+	.set_mmss = x1205_rtc_set_mmss,
+};
+
+static ssize_t x1205_sysfs_show_atrim(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int atrim;
+
+        if (x1205_get_atrim(to_i2c_client(dev), &atrim) == 0) {
+                return sprintf(buf, "%d.%02d pF\n",
+                        atrim / 1000, atrim % 1000);        }
+        return 0;
+}
+static DEVICE_ATTR(atrim, S_IRUGO, x1205_sysfs_show_atrim, NULL);
+
+static ssize_t x1205_sysfs_show_dtrim(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int dtrim;
+
+        if (x1205_get_dtrim(to_i2c_client(dev), &dtrim) == 0) {
+                return sprintf(buf, "%d ppm\n", dtrim);
+        }
+        return 0;
+}
+static DEVICE_ATTR(dtrim, S_IRUGO, x1205_sysfs_show_dtrim, NULL);
+
+
+static int x1205_attach(struct i2c_adapter *adapter)
+{
+	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
+
+	return i2c_probe(adapter, &addr_data, x1205_probe);
+}
+
+static int x1205_probe(struct i2c_adapter *adapter, int address, int kind)
+{
+	int err = 0;
+	unsigned char sr;
+	struct i2c_client *client;
+	struct rtc_device *rtc;
+
+	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+		err = -ENODEV;
+		goto exit;
+	}
+
+	if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	/* I2C client */
+	client->addr = address;
+	client->driver = &x1205_driver;
+	client->adapter	= adapter;
+
+	strlcpy(client->name, x1205_driver.name, I2C_NAME_SIZE);
+
+	/* Verify the chip is really an X1205 */
+	if (kind < 0) {
+		if (x1205_validate_client(client) < 0) {
+			err = -ENODEV;
+			goto exit_kfree;
+		}
+	}
+
+	/* Inform the i2c layer */
+	if ((err = i2c_attach_client(client)))
+		goto exit_kfree;
+
+	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+
+	rtc = rtc_device_register(x1205_driver.name, &client->dev,
+				&x1205_rtc_ops, THIS_MODULE);
+
+	if (IS_ERR(rtc)) {
+		err = PTR_ERR(rtc);
+		dev_err(&client->dev,
+			"unable to register the class device\n");
+		goto exit_detach;
+	}
+
+	i2c_set_clientdata(client, rtc);
+
+	/* Check for power failures and eventualy enable the osc */
+	if ((err = x1205_get_status(client, &sr)) == 0) {
+		if (sr & X1205_SR_RTCF) {
+			dev_err(&client->dev,
+				"power failure detected, "
+				"please set the clock\n");
+			udelay(50);
+			x1205_fix_osc(client);
+		}
+	}
+	else
+		dev_err(&client->dev, "couldn't read status\n");
+
+	/* If requested, set the system time */
+	if (hctosys) {
+		if ((err = x1205_hctosys(client)) < 0)
+			dev_err(&client->dev,
+				"unable to set the system clock\n");
+	}
+
+	device_create_file(&client->dev, &dev_attr_atrim);
+	device_create_file(&client->dev, &dev_attr_dtrim);
+
+	return 0;
+
+exit_detach:
+	i2c_detach_client(client);
+
+exit_kfree:
+	kfree(client);
+
+exit:
+	return err;
+}
+
+static int x1205_detach(struct i2c_client *client)
+{
+	int err;
+	struct rtc_device *rtc = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "%s\n", __FUNCTION__);
+
+ 	if (rtc)
+		rtc_device_unregister(rtc);
+
+	if ((err = i2c_detach_client(client)))
+		return err;
+
+	kfree(client);
+
+	return 0;
+}
+
+static int __init x1205_init(void)
+{
+	return i2c_add_driver(&x1205_driver);
+}
+
+static void __exit x1205_exit(void)
+{
+	i2c_del_driver(&x1205_driver);
+}
+
+MODULE_AUTHOR(
+	"Karen Spearel <kas11@tampabay.rr.com>, "
+	"Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("Xicor/Intersil X1205 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(x1205_init);
+module_exit(x1205_exit);
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-test.c	2006-01-04 01:27:19.000000000 +0100
@@ -0,0 +1,189 @@
+/*
+ * An RTC test device/driver
+ * Copyright (C) 2005 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * 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/module.h>
+#include <linux/err.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+
+static int test_rtc_read_alarm(struct device *dev,
+	struct rtc_wkalrm *alrm)
+{
+	return 0;
+}
+
+static int test_rtc_set_alarm(struct device *dev,
+	struct rtc_wkalrm *alrm)
+{
+	return 0;
+}
+
+static int test_rtc_read_time(struct device *dev,
+	struct rtc_time *tm)
+{
+	rtc_time_to_tm(get_seconds(), tm);
+	return 0;
+}
+
+static int test_rtc_set_time(struct device *dev,
+	struct rtc_time *tm)
+{
+	return 0;
+}
+
+static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
+{
+	return 0;
+}
+
+static int test_rtc_proc(struct device *dev, struct seq_file *seq)
+{
+	struct platform_device *plat_dev = to_platform_device(dev);
+
+	seq_printf(seq, "24hr\t\t: yes\n");
+	seq_printf(seq, "test\t\t: yes\n");
+	seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
+
+	return 0;
+}
+
+static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
+	unsigned long arg)
+{
+	/* We do support interrupts, they're generated
+	 * using the sysfs interface.
+	 */
+	switch (cmd) {
+	case RTC_PIE_ON:
+	case RTC_PIE_OFF:
+	case RTC_UIE_ON:
+	case RTC_UIE_OFF:
+	case RTC_AIE_ON:
+	case RTC_AIE_OFF:
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct rtc_class_ops test_rtc_ops = {
+	.proc = test_rtc_proc,
+	.read_time = test_rtc_read_time,
+	.set_time = test_rtc_set_time,
+	.read_alarm = test_rtc_read_alarm,
+	.set_alarm = test_rtc_set_alarm,
+	.set_mmss = test_rtc_set_mmss,
+	.ioctl = test_rtc_ioctl,
+};
+
+static ssize_t test_irq_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", 42);
+}
+static ssize_t test_irq_store(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	int retval;
+	struct platform_device *plat_dev = to_platform_device(dev);
+	struct rtc_device *rtc = platform_get_drvdata(plat_dev);
+
+	retval = count;
+	if (strncmp(buf, "tick", 4) == 0)
+		rtc_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF);
+	else if (strncmp(buf, "alarm", 5) == 0)
+		rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF);
+	else if (strncmp(buf, "update", 6) == 0)
+		rtc_update_irq(&rtc->class_dev, 1, RTC_UF | RTC_IRQF);
+	else
+		retval = -EINVAL;
+
+	return retval;
+}
+static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
+
+static int test_probe(struct platform_device *plat_dev)
+{
+	int err;
+	struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
+						&test_rtc_ops, THIS_MODULE);
+	if (IS_ERR(rtc)) {
+		err = PTR_ERR(rtc);
+		dev_err(&plat_dev->dev,
+			"unable to register the class device\n");
+		return err;
+	}
+	device_create_file(&plat_dev->dev, &dev_attr_irq);
+
+	platform_set_drvdata(plat_dev, rtc);
+
+	return 0;
+}
+
+static int test_remove(struct platform_device *plat_dev)
+{
+	struct rtc_device *rtc = platform_get_drvdata(plat_dev);
+
+	rtc_device_unregister(rtc);
+	device_remove_file(&plat_dev->dev, &dev_attr_irq);
+
+	return 0;
+}
+
+static void test_release(struct device * dev)
+{
+}
+
+struct platform_device test_dev_zero = {
+	.name	= "rtc-test",
+	.id	= 0,
+	.dev.release = test_release,
+};
+
+struct platform_device test_dev_one = {
+	.name	= "rtc-test",
+	.id	= 1,
+	.dev.release = test_release,
+};
+
+struct platform_driver test_drv = {
+	.probe	= test_probe,
+	.remove = test_remove,
+	.driver = {
+		.name = "rtc-test",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init test_init(void)
+{
+	platform_device_register(&test_dev_zero);
+	platform_device_register(&test_dev_one);
+	platform_driver_register(&test_drv);
+
+	return 0;
+}
+
+static void __exit test_exit(void)
+{
+	platform_driver_unregister(&test_drv);
+	platform_device_unregister(&test_dev_zero);
+	platform_device_unregister(&test_dev_one);
+}
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("RTC test driver/device");
+MODULE_LICENSE("GPL");
+
+module_init(test_init);
+module_exit(test_exit);
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-nslu2/drivers/rtc/rtc-ds1672.c	2006-01-04 01:27:21.000000000 +0100
@@ -0,0 +1,266 @@
+/*
+ * An rtc/i2c driver for the Dallas DS1672
+ * Copyright 2005 Alessandro Zummo
+ *
+ * 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/module.h>
+#include <linux/i2c.h>
+#include <linux/rtc.h>
+
+#define DRV_VERSION "0.1"
+
+/* Addresses to scan: none. This chip cannot be detected. */
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD;
+I2C_CLIENT_MODULE_PARM(hctosys,
+	"Set the system time from the hardware clock upon initialization");
+
+/* Registers */
+
+#define DS1672_REG_CNT_BASE	0
+#define DS1672_REG_CONTROL	4
+#define DS1672_REG_TRICKLE	5
+
+
+/* Prototypes */
+static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind);
+
+/*
+ * In the routines that deal directly with the ds1672 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch
+ * Epoch is initialized as 2000. Time is set to UTC.
+ */
+static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+	unsigned long time;
+	unsigned char buf[4];
+
+	dev_dbg(&client->dev,
+		"%s: raw read data - counters=%02x,%02x,%02x,%02x\n"
+		__FUNCTION__,
+		buf[0], buf[1], buf[2], buf[3]);
+
+	time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+
+	rtc_time_to_tm(time, tm);
+
+	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
+		"mday=%d, mon=%d, year=%d, wday=%d\n",
+		__FUNCTION__,
+		tm->tm_sec, tm->tm_min, tm->tm_hour,
+		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+	return 0;
+}
+
+static int ds1672_set_mmss(struct i2c_client *client, unsigned long secs)
+{
+	int xfer;
+	unsigned char buf[5];
+
+	buf[0] = DS1672_REG_CNT_BASE;
+	buf[1] = secs & 0x000000FF;
+	buf[2] = (secs & 0x0000FF00) >> 8;
+	buf[3] = (secs & 0x00FF0000) >> 16;
+	buf[4] = (secs & 0xFF000000) >> 24;
+
+	xfer = i2c_master_send(client, buf, 5);
+	if (xfer != 5) {
+		dev_err(&client->dev, "%s: send: %d\n", __FUNCTION__, xfer);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int ds1672_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+	unsigned long secs;
+
+	dev_dbg(&client->dev,
+		"%s: secs=%d, mins=%d, hours=%d, ",
+		"mday=%d, mon=%d, year=%d, wday=%d\n",
+		__FUNCTION__,
+		tm->tm_sec, tm->tm_min, tm->tm_hour,
+		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+
+	rtc_tm_to_time(tm, &secs);
+
+	return ds1672_set_mmss(client, secs);
+}
+
+static int ds1672_hctosys(struct i2c_client *client)
+{
+	int err;
+	struct rtc_time tm;
+	struct timespec tv;
+
+	if ((err = ds1672_get_datetime(client, &tm)) != 0)
+		return err;
+
+	/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary
+	 * whether it stores the most close value or the value with partial
+	 * seconds truncated. However, it is important that we use it to store
+	 * the truncated value. This is because otherwise it is necessary,
+	 * in an rtc sync function, to read both xtime.tv_sec and
+	 * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
+	 * of >32bits is not possible. So storing the most close value would
+	 * slow down the sync API. So here we have the truncated value and
+	 * the best guess is to add 0.5s.
+	 */
+
+	tv.tv_nsec = NSEC_PER_SEC >> 1;
+
+	rtc_tm_to_time(&tm, &tv.tv_sec);
+
+	do_settimeofday(&tv);
+
+	dev_info(&client->dev,
+		"setting the system clock to %d-%02d-%02d %02d:%02d:%02d\n",
+		tm.tm_year + 1900, tm.tm_mon + 1,
+		tm.tm_mday, tm.tm_hour, tm.tm_min,
+		tm.tm_sec);
+
+	return 0;
+}
+
+static int ds1672_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	return ds1672_get_datetime(to_i2c_client(dev), tm);
+}
+
+static int ds1672_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	return ds1672_set_datetime(to_i2c_client(dev), tm);
+}
+
+static int ds1672_rtc_set_mmss(struct device *dev, unsigned long secs)
+{
+	return ds1672_set_mmss(to_i2c_client(dev), secs);
+}
+
+static struct rtc_class_ops ds1672_rtc_ops = {
+	.read_time = ds1672_rtc_read_time,
+	.set_time = ds1672_rtc_set_time,
+	.set_mmss = ds1672_rtc_set_mmss,
+};
+
+static int ds1672_attach(struct i2c_adapter *adapter)
+{
+	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
+
+	return i2c_probe(adapter, &addr_data, ds1672_probe);
+}
+
+static int ds1672_detach(struct i2c_client *client)
+{
+	int err;
+	struct rtc_device *rtc = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "%s\n", __FUNCTION__);
+
+ 	if (rtc)
+		rtc_device_unregister(rtc);
+
+	if ((err = i2c_detach_client(client)))
+		return err;
+
+	kfree(client);
+
+	return 0;
+}
+
+static struct i2c_driver ds1672_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "ds1672",
+	.flags		= I2C_DF_NOTIFY,
+	.attach_adapter = &ds1672_attach,
+	.detach_client	= &ds1672_detach,
+};
+
+static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
+{
+	int err = 0;
+	struct i2c_client *client;
+	struct rtc_device *rtc;
+
+	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+		err = -ENODEV;
+		goto exit;
+	}
+
+	if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	/* I2C client */
+	client->addr = address;
+	client->driver = &ds1672_driver;
+	client->adapter	= adapter;
+
+	strlcpy(client->name, ds1672_driver.name, I2C_NAME_SIZE);
+
+	/* Inform the i2c layer */
+	if ((err = i2c_attach_client(client)))
+		goto exit_kfree;
+
+	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+
+	rtc = rtc_device_register(ds1672_driver.name, &client->dev,
+				&ds1672_rtc_ops, THIS_MODULE);
+
+	if (IS_ERR(rtc)) {
+		err = PTR_ERR(rtc);
+		dev_err(&client->dev,
+			"unable to register the class device\n");
+		goto exit_detach;
+	}
+
+	i2c_set_clientdata(client, rtc);
+
+	/* If requested, set the system time */
+	if (hctosys) {
+		if ((err = ds1672_hctosys(client)) < 0)
+			dev_err(&client->dev,
+				"unable to set the system clock\n");
+	}
+
+	return 0;
+
+exit_detach:
+	i2c_detach_client(client);
+
+exit_kfree:
+	kfree(client);
+
+exit:
+	return err;
+}
+
+static int __init ds1672_init(void)
+{
+	return i2c_add_driver(&ds1672_driver);
+}
+
+static void __exit ds1672_exit(void)
+{
+	i2c_del_driver(&ds1672_driver);
+}
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("Dallas/Maxim DS1672 timekeeper driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(ds1672_init);
+module_exit(ds1672_exit);