[RTC] remove old ARM rtc library code

Now that all drivers using it are gone, remove the old ARM RTC library.

Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/common/Makefile

@@ -2,7 +2,6 @@
 # Makefile for the linux kernel.
 #
 
-obj-y				+= rtctime.o
 obj-$(CONFIG_ARM_GIC)		+= gic.o
 obj-$(CONFIG_ARM_VIC)		+= vic.o
 obj-$(CONFIG_ICST525)		+= icst525.o

arch/arm/common/rtctime.c

@@ -1,434 +0,0 @@
-/*
- *  linux/arch/arm/common/rtctime.c
- *
- *  Copyright (C) 2003 Deep Blue Solutions Ltd.
- *  Based on sa1100-rtc.c, Nils Faerber, CIH, Nicolas Pitre.
- *  Based on rtc.c by Paul Gortmaker
- *
- * 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/kernel.h>
-#include <linux/time.h>
-#include <linux/rtc.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/miscdevice.h>
-#include <linux/spinlock.h>
-#include <linux/capability.h>
-#include <linux/device.h>
-#include <linux/mutex.h>
-
-#include <asm/rtc.h>
-
-static DECLARE_WAIT_QUEUE_HEAD(rtc_wait);
-static struct fasync_struct *rtc_async_queue;
-
-/*
- * rtc_lock protects rtc_irq_data
- */
-static DEFINE_SPINLOCK(rtc_lock);
-static unsigned long rtc_irq_data;
-
-/*
- * rtc_sem protects rtc_inuse and rtc_ops
- */
-static DEFINE_MUTEX(rtc_mutex);
-static unsigned long rtc_inuse;
-static struct rtc_ops *rtc_ops;
-
-#define rtc_epoch 1900UL
-
-/*
- * Calculate the next alarm time given the requested alarm time mask
- * and the current time.
- */
-void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc_time *alrm)
-{
-	unsigned long next_time;
-	unsigned long now_time;
-
-	next->tm_year = now->tm_year;
-	next->tm_mon = now->tm_mon;
-	next->tm_mday = now->tm_mday;
-	next->tm_hour = alrm->tm_hour;
-	next->tm_min = alrm->tm_min;
-	next->tm_sec = alrm->tm_sec;
-
-	rtc_tm_to_time(now, &now_time);
-	rtc_tm_to_time(next, &next_time);
-
-	if (next_time < now_time) {
-		/* Advance one day */
-		next_time += 60 * 60 * 24;
-		rtc_time_to_tm(next_time, next);
-	}
-}
-EXPORT_SYMBOL(rtc_next_alarm_time);
-
-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_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)
-{
-	int ret;
-
-	ret = rtc_valid_tm(tm);
-	if (ret == 0)
-		ret = ops->set_time(tm);
-
-	return ret;
-}
-
-static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
-{
-	int ret = -EINVAL;
-	if (ops->read_alarm) {
-		memset(alrm, 0, sizeof(struct rtc_wkalrm));
-		ret = ops->read_alarm(alrm);
-	}
-	return ret;
-}
-
-static inline int rtc_arm_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
-{
-	int ret = -EINVAL;
-	if (ops->set_alarm)
-		ret = ops->set_alarm(alrm);
-	return ret;
-}
-
-void rtc_update(unsigned long num, unsigned long events)
-{
-	spin_lock(&rtc_lock);
-	rtc_irq_data = (rtc_irq_data + (num << 8)) | events;
-	spin_unlock(&rtc_lock);
-
-	wake_up_interruptible(&rtc_wait);
-	kill_fasync(&rtc_async_queue, SIGIO, POLL_IN);
-}
-EXPORT_SYMBOL(rtc_update);
-
-
-static ssize_t
-rtc_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	unsigned long data;
-	ssize_t ret;
-
-	if (count < sizeof(unsigned long))
-		return -EINVAL;
-
-	add_wait_queue(&rtc_wait, &wait);
-	do {
-		__set_current_state(TASK_INTERRUPTIBLE);
-
-		spin_lock_irq(&rtc_lock);
-		data = rtc_irq_data;
-		rtc_irq_data = 0;
-		spin_unlock_irq(&rtc_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_wait, &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_poll(struct file *file, poll_table *wait)
-{
-	unsigned long data;
-
-	poll_wait(file, &rtc_wait, wait);
-
-	spin_lock_irq(&rtc_lock);
-	data = rtc_irq_data;
-	spin_unlock_irq(&rtc_lock);
-
-	return data != 0 ? POLLIN | POLLRDNORM : 0;
-}
-
-static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-		     unsigned long arg)
-{
-	struct rtc_ops *ops = file->private_data;
-	struct rtc_time tm;
-	struct rtc_wkalrm alrm;
-	void __user *uarg = (void __user *)arg;
-	int ret = -EINVAL;
-
-	switch (cmd) {
-	case RTC_ALM_READ:
-		ret = rtc_arm_read_alarm(ops, &alrm);
-		if (ret)
-			break;
-		ret = copy_to_user(uarg, &alrm.time, sizeof(tm));
-		if (ret)
-			ret = -EFAULT;
-		break;
-
-	case RTC_ALM_SET:
-		ret = copy_from_user(&alrm.time, uarg, sizeof(tm));
-		if (ret) {
-			ret = -EFAULT;
-			break;
-		}
-		alrm.enabled = 0;
-		alrm.pending = 0;
-		alrm.time.tm_mday = -1;
-		alrm.time.tm_mon = -1;
-		alrm.time.tm_year = -1;
-		alrm.time.tm_wday = -1;
-		alrm.time.tm_yday = -1;
-		alrm.time.tm_isdst = -1;
-		ret = rtc_arm_set_alarm(ops, &alrm);
-		break;
-
-	case RTC_RD_TIME:
-		ret = rtc_arm_read_time(ops, &tm);
-		if (ret)
-			break;
-		ret = copy_to_user(uarg, &tm, sizeof(tm));
-		if (ret)
-			ret = -EFAULT;
-		break;
-
-	case RTC_SET_TIME:
-		if (!capable(CAP_SYS_TIME)) {
-			ret = -EACCES;
-			break;
-		}
-		ret = copy_from_user(&tm, uarg, sizeof(tm));
-		if (ret) {
-			ret = -EFAULT;
-			break;
-		}
-		ret = rtc_arm_set_time(ops, &tm);
-		break;
-
-	case RTC_EPOCH_SET:
-#ifndef rtc_epoch
-		/*
-		 * There were no RTC clocks before 1900.
-		 */
-		if (arg < 1900) {
-			ret = -EINVAL;
-			break;
-		}
-		if (!capable(CAP_SYS_TIME)) {
-			ret = -EACCES;
-			break;
-		}
-		rtc_epoch = arg;
-		ret = 0;
-#endif
-		break;
-
-	case RTC_EPOCH_READ:
-		ret = put_user(rtc_epoch, (unsigned long __user *)uarg);
-		break;
-
-	case RTC_WKALM_SET:
-		ret = copy_from_user(&alrm, uarg, sizeof(alrm));
-		if (ret) {
-			ret = -EFAULT;
-			break;
-		}
-		ret = rtc_arm_set_alarm(ops, &alrm);
-		break;
-
-	case RTC_WKALM_RD:
-		ret = rtc_arm_read_alarm(ops, &alrm);
-		if (ret)
-			break;
-		ret = copy_to_user(uarg, &alrm, sizeof(alrm));
-		if (ret)
-			ret = -EFAULT;
-		break;
-
-	default:
-		if (ops->ioctl)
-			ret = ops->ioctl(cmd, arg);
-		break;
-	}
-	return ret;
-}
-
-static int rtc_open(struct inode *inode, struct file *file)
-{
-	int ret;
-
-	mutex_lock(&rtc_mutex);
-
-	if (rtc_inuse) {
-		ret = -EBUSY;
-	} else if (!rtc_ops || !try_module_get(rtc_ops->owner)) {
-		ret = -ENODEV;
-	} else {
-		file->private_data = rtc_ops;
-
-		ret = rtc_ops->open ? rtc_ops->open() : 0;
-		if (ret == 0) {
-			spin_lock_irq(&rtc_lock);
-			rtc_irq_data = 0;
-			spin_unlock_irq(&rtc_lock);
-
-			rtc_inuse = 1;
-		}
-	}
-	mutex_unlock(&rtc_mutex);
-
-	return ret;
-}
-
-static int rtc_release(struct inode *inode, struct file *file)
-{
-	struct rtc_ops *ops = file->private_data;
-
-	if (ops->release)
-		ops->release();
-
-	spin_lock_irq(&rtc_lock);
-	rtc_irq_data = 0;
-	spin_unlock_irq(&rtc_lock);
-
-	module_put(rtc_ops->owner);
-	rtc_inuse = 0;
-
-	return 0;
-}
-
-static int rtc_fasync(int fd, struct file *file, int on)
-{
-	return fasync_helper(fd, file, on, &rtc_async_queue);
-}
-
-static const struct file_operations rtc_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.read		= rtc_read,
-	.poll		= rtc_poll,
-	.ioctl		= rtc_ioctl,
-	.open		= rtc_open,
-	.release	= rtc_release,
-	.fasync		= rtc_fasync,
-};
-
-static struct miscdevice rtc_miscdev = {
-	.minor		= RTC_MINOR,
-	.name		= "rtc",
-	.fops		= &rtc_fops,
-};
-
-
-static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data)
-{
-	struct rtc_ops *ops = data;
-	struct rtc_wkalrm alrm;
-	struct rtc_time tm;
-	char *p = page;
-
-	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"
-			"rtc_epoch\t: %04lu\n",
-			tm.tm_hour, tm.tm_min, tm.tm_sec,
-			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
-			rtc_epoch);
-	}
-
-	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);
-		else
-			p += sprintf(p, "**:");
-		if ((unsigned int)alrm.time.tm_min <= 59)
-			p += sprintf(p, "%02d:", alrm.time.tm_min);
-		else
-			p += sprintf(p, "**:");
-		if ((unsigned int)alrm.time.tm_sec <= 59)
-			p += sprintf(p, "%02d\n", alrm.time.tm_sec);
-		else
-			p += sprintf(p, "**\n");
-
-		p += sprintf(p, "alrm_date\t: ");
-		if ((unsigned int)alrm.time.tm_year <= 200)
-			p += sprintf(p, "%04d-", alrm.time.tm_year + 1900);
-		else
-			p += sprintf(p, "****-");
-		if ((unsigned int)alrm.time.tm_mon <= 11)
-			p += sprintf(p, "%02d-", alrm.time.tm_mon + 1);
-		else
-			p += sprintf(p, "**-");
-		if ((unsigned int)alrm.time.tm_mday <= 31)
-			p += sprintf(p, "%02d\n", alrm.time.tm_mday);
-		else
-			p += sprintf(p, "**\n");
-		p += sprintf(p, "alrm_wakeup\t: %s\n",
-			     alrm.enabled ? "yes" : "no");
-		p += sprintf(p, "alrm_pending\t: %s\n",
-			     alrm.pending ? "yes" : "no");
-	}
-
-	if (ops->proc)
-		p += ops->proc(p);
-
-	return p - page;
-}
-
-int register_rtc(struct rtc_ops *ops)
-{
-	int ret = -EBUSY;
-
-	mutex_lock(&rtc_mutex);
-	if (rtc_ops == NULL) {
-		rtc_ops = ops;
-
-		ret = misc_register(&rtc_miscdev);
-		if (ret == 0)
-			create_proc_read_entry("driver/rtc", 0, NULL,
-					       rtc_read_proc, ops);
-	}
-	mutex_unlock(&rtc_mutex);
-
-	return ret;
-}
-EXPORT_SYMBOL(register_rtc);
-
-void unregister_rtc(struct rtc_ops *rtc)
-{
-	mutex_lock(&rtc_mutex);
-	if (rtc == rtc_ops) {
-		remove_proc_entry("driver/rtc", NULL);
-		misc_deregister(&rtc_miscdev);
-		rtc_ops = NULL;
-	}
-	mutex_unlock(&rtc_mutex);
-}
-EXPORT_SYMBOL(unregister_rtc);

include/asm-arm/rtc.h

@@ -1,43 +0,0 @@
-/*
- *  linux/include/asm-arm/rtc.h
- *
- *  Copyright (C) 2003 Deep Blue Solutions Ltd.
- *
- * 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.
- */
-#ifndef ASMARM_RTC_H
-#define ASMARM_RTC_H
-
-struct module;
-
-struct rtc_ops {
-	struct module	*owner;
-	int		(*open)(void);
-	void		(*release)(void);
-	int		(*ioctl)(unsigned int, unsigned long);
-
-	int		(*read_time)(struct rtc_time *);
-	int		(*set_time)(struct rtc_time *);
-	int		(*read_alarm)(struct rtc_wkalrm *);
-	int		(*set_alarm)(struct rtc_wkalrm *);
-	int		(*proc)(char *buf);
-};
-
-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 *);
-void unregister_rtc(struct rtc_ops *);
-
-static inline int rtc_periodic_alarm(struct rtc_time *tm)
-{
-	return  (tm->tm_year == -1) ||
-		((unsigned)tm->tm_mon >= 12) ||
-		((unsigned)(tm->tm_mday - 1) >= 31) ||
-		((unsigned)tm->tm_hour > 23) ||
-		((unsigned)tm->tm_min > 59) ||
-		((unsigned)tm->tm_sec > 59);
-}
-
-#endif