[PATCH] Remove old drivers/char/s3c2410_rtc.c

This can now be removed, since there is now a drivers/rtc/rtc-s3c.c driver.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/char/Kconfig

@@ -831,14 +831,6 @@ config DS1302
 	  will get access to the real time clock (or hardware clock) built
 	  into your computer.
 
-config S3C2410_RTC
-	bool "S3C2410 RTC Driver"
-	depends on ARCH_S3C2410
-	help
-	  RTC (Realtime Clock) driver for the clock inbuilt into the
-	  Samsung S3C2410. This can provide periodic interrupt rates
-	  from 1Hz to 64Hz for user programs, and wakeup from Alarm.
-
 config COBALT_LCD
 	bool "Support for Cobalt LCD"
 	depends on MIPS_COBALT

drivers/char/Makefile

@@ -69,7 +69,6 @@ obj-$(CONFIG_EFI_RTC)		+= efirtc.o
 obj-$(CONFIG_SGI_DS1286)	+= ds1286.o
 obj-$(CONFIG_SGI_IP27_RTC)	+= ip27-rtc.o
 obj-$(CONFIG_DS1302)		+= ds1302.o
-obj-$(CONFIG_S3C2410_RTC)	+= s3c2410-rtc.o
 ifeq ($(CONFIG_GENERIC_NVRAM),y)
   obj-$(CONFIG_NVRAM)	+= generic_nvram.o
 else

drivers/char/s3c2410-rtc.c

-/* drivers/char/s3c2410_rtc.c
- *
- * Copyright (c) 2004 Simtec Electronics <linux@simtec.co.uk>
- *		      http://www.simtec.co.uk/products/SWLINUX/
- *
- * 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.
- *
- * S3C2410 Internal RTC Driver
- *
- *  Changelog:
- *	08-Nov-2004	BJD	Initial creation
- *	12-Nov-2004	BJD	Added periodic IRQ and PM code
- *	22-Nov-2004	BJD	Sign-test on alarm code to check for <0
- *	10-Mar-2005	LCVR	Changed S3C2410_VA_RTC to S3C24XX_VA_RTC
-*/
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/rtc.h>
-#include <linux/bcd.h>
-#include <linux/clk.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/rtc.h>
-
-#include <asm/mach/time.h>
-
-#include <asm/arch/regs-rtc.h>
-
-/* need this for the RTC_AF definitions */
-#include <linux/mc146818rtc.h>
-
-#undef S3C24XX_VA_RTC
-#define S3C24XX_VA_RTC s3c2410_rtc_base
-
-static struct resource *s3c2410_rtc_mem;
-
-static void __iomem *s3c2410_rtc_base;
-static int s3c2410_rtc_alarmno = NO_IRQ;
-static int s3c2410_rtc_tickno  = NO_IRQ;
-static int s3c2410_rtc_freq    = 1;
-
-static DEFINE_SPINLOCK(s3c2410_rtc_pie_lock);
-
-/* IRQ Handlers */
-
-static irqreturn_t s3c2410_rtc_alarmirq(int irq, void *id, struct pt_regs *r)
-{
-	rtc_update(1, RTC_AF | RTC_IRQF);
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t s3c2410_rtc_tickirq(int irq, void *id, struct pt_regs *r)
-{
-	rtc_update(1, RTC_PF | RTC_IRQF);
-	return IRQ_HANDLED;
-}
-
-/* Update control registers */
-static void s3c2410_rtc_setaie(int to)
-{
-	unsigned int tmp;
-
-	pr_debug("%s: aie=%d\n", __FUNCTION__, to);
-
-	tmp = readb(S3C2410_RTCALM);
-
-	if (to)
-		tmp |= S3C2410_RTCALM_ALMEN;
-	else
-		tmp &= ~S3C2410_RTCALM_ALMEN;
-
-
-	writeb(tmp, S3C2410_RTCALM);
-}
-
-static void s3c2410_rtc_setpie(int to)
-{
-	unsigned int tmp;
-
-	pr_debug("%s: pie=%d\n", __FUNCTION__, to);
-
-	spin_lock_irq(&s3c2410_rtc_pie_lock);
-	tmp = readb(S3C2410_TICNT) & ~S3C2410_TICNT_ENABLE;
-
-	if (to)
-		tmp |= S3C2410_TICNT_ENABLE;
-
-	writeb(tmp, S3C2410_TICNT);
-	spin_unlock_irq(&s3c2410_rtc_pie_lock);
-}
-
-static void s3c2410_rtc_setfreq(int freq)
-{
-	unsigned int tmp;
-
-	spin_lock_irq(&s3c2410_rtc_pie_lock);
-	tmp = readb(S3C2410_TICNT) & S3C2410_TICNT_ENABLE;
-
-	s3c2410_rtc_freq = freq;
-
-	tmp |= (128 / freq)-1;
-
-	writeb(tmp, S3C2410_TICNT);
-	spin_unlock_irq(&s3c2410_rtc_pie_lock);
-}
-
-/* Time read/write */
-
-static int s3c2410_rtc_gettime(struct rtc_time *rtc_tm)
-{
-	unsigned int have_retried = 0;
-
- retry_get_time:
-	rtc_tm->tm_min  = readb(S3C2410_RTCMIN);
-	rtc_tm->tm_hour = readb(S3C2410_RTCHOUR);
-	rtc_tm->tm_mday = readb(S3C2410_RTCDATE);
-	rtc_tm->tm_mon  = readb(S3C2410_RTCMON);
-	rtc_tm->tm_year = readb(S3C2410_RTCYEAR);
-	rtc_tm->tm_sec  = readb(S3C2410_RTCSEC);
-
-	/* the only way to work out wether the system was mid-update
-	 * when we read it is to check the second counter, and if it
-	 * is zero, then we re-try the entire read
-	 */
-
-	if (rtc_tm->tm_sec == 0 && !have_retried) {
-		have_retried = 1;
-		goto retry_get_time;
-	}
-
-	pr_debug("read time %02x.%02x.%02x %02x/%02x/%02x\n",
-		 rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
-		 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
-
-	BCD_TO_BIN(rtc_tm->tm_sec);
-	BCD_TO_BIN(rtc_tm->tm_min);
-	BCD_TO_BIN(rtc_tm->tm_hour);
-	BCD_TO_BIN(rtc_tm->tm_mday);
-	BCD_TO_BIN(rtc_tm->tm_mon);
-	BCD_TO_BIN(rtc_tm->tm_year);
-
-	rtc_tm->tm_year += 100;
-	rtc_tm->tm_mon -= 1;
-
-	return 0;
-}
-
-
-static int s3c2410_rtc_settime(struct rtc_time *tm)
-{
-	/* the rtc gets round the y2k problem by just not supporting it */
-
-	if (tm->tm_year < 100)
-		return -EINVAL;
-
-	writeb(BIN2BCD(tm->tm_sec),  S3C2410_RTCSEC);
-	writeb(BIN2BCD(tm->tm_min),  S3C2410_RTCMIN);
-	writeb(BIN2BCD(tm->tm_hour), S3C2410_RTCHOUR);
-	writeb(BIN2BCD(tm->tm_mday), S3C2410_RTCDATE);
-	writeb(BIN2BCD(tm->tm_mon + 1), S3C2410_RTCMON);
-	writeb(BIN2BCD(tm->tm_year - 100), S3C2410_RTCYEAR);
-
-	return 0;
-}
-
-static int s3c2410_rtc_getalarm(struct rtc_wkalrm *alrm)
-{
-	struct rtc_time *alm_tm = &alrm->time;
-	unsigned int alm_en;
-
-	alm_tm->tm_sec  = readb(S3C2410_ALMSEC);
-	alm_tm->tm_min  = readb(S3C2410_ALMMIN);
-	alm_tm->tm_hour = readb(S3C2410_ALMHOUR);
-	alm_tm->tm_mon  = readb(S3C2410_ALMMON);
-	alm_tm->tm_mday = readb(S3C2410_ALMDATE);
-	alm_tm->tm_year = readb(S3C2410_ALMYEAR);
-
-	alm_en = readb(S3C2410_RTCALM);
-
-	pr_debug("read alarm %02x %02x.%02x.%02x %02x/%02x/%02x\n",
-		 alm_en,
-		 alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
-		 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
-
-
-	/* decode the alarm enable field */
-
-	if (alm_en & S3C2410_RTCALM_SECEN) {
-		BCD_TO_BIN(alm_tm->tm_sec);
-	} else {
-		alm_tm->tm_sec = 0xff;
-	}
-
-	if (alm_en & S3C2410_RTCALM_MINEN) {
-		BCD_TO_BIN(alm_tm->tm_min);
-	} else {
-		alm_tm->tm_min = 0xff;
-	}
-
-	if (alm_en & S3C2410_RTCALM_HOUREN) {
-		BCD_TO_BIN(alm_tm->tm_hour);
-	} else {
-		alm_tm->tm_hour = 0xff;
-	}
-
-	if (alm_en & S3C2410_RTCALM_DAYEN) {
-		BCD_TO_BIN(alm_tm->tm_mday);
-	} else {
-		alm_tm->tm_mday = 0xff;
-	}
-
-	if (alm_en & S3C2410_RTCALM_MONEN) {
-		BCD_TO_BIN(alm_tm->tm_mon);
-		alm_tm->tm_mon -= 1;
-	} else {
-		alm_tm->tm_mon = 0xff;
-	}
-
-	if (alm_en & S3C2410_RTCALM_YEAREN) {
-		BCD_TO_BIN(alm_tm->tm_year);
-	} else {
-		alm_tm->tm_year = 0xffff;
-	}
-
-	/* todo - set alrm->enabled ? */
-
-	return 0;
-}
-
-static int s3c2410_rtc_setalarm(struct rtc_wkalrm *alrm)
-{
-	struct rtc_time *tm = &alrm->time;
-	unsigned int alrm_en;
-
-	pr_debug("s3c2410_rtc_setalarm: %d, %02x/%02x/%02x %02x.%02x.%02x\n",
-		 alrm->enabled,
-		 tm->tm_mday & 0xff, tm->tm_mon & 0xff, tm->tm_year & 0xff,
-		 tm->tm_hour & 0xff, tm->tm_min & 0xff, tm->tm_sec);
-
-	if (alrm->enabled || 1) {
-		alrm_en = readb(S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
-		writeb(0x00, S3C2410_RTCALM);
-
-		if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
-			alrm_en |= S3C2410_RTCALM_SECEN;
-			writeb(BIN2BCD(tm->tm_sec), S3C2410_ALMSEC);
-		}
-
-		if (tm->tm_min < 60 && tm->tm_min >= 0) {
-			alrm_en |= S3C2410_RTCALM_MINEN;
-			writeb(BIN2BCD(tm->tm_min), S3C2410_ALMMIN);
-		}
-
-		if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
-			alrm_en |= S3C2410_RTCALM_HOUREN;
-			writeb(BIN2BCD(tm->tm_hour), S3C2410_ALMHOUR);
-		}
-
-		pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
-
-		writeb(alrm_en, S3C2410_RTCALM);
-		enable_irq_wake(s3c2410_rtc_alarmno);
-	} else {
-		alrm_en = readb(S3C2410_RTCALM);
-		alrm_en &= ~S3C2410_RTCALM_ALMEN;
-		writeb(alrm_en, S3C2410_RTCALM);
-		disable_irq_wake(s3c2410_rtc_alarmno);
-	}
-
-	return 0;
-}
-
-static int s3c2410_rtc_ioctl(unsigned int cmd, unsigned long arg)
-{
-	switch (cmd) {
-	case RTC_AIE_OFF:
-	case RTC_AIE_ON:
-		s3c2410_rtc_setaie((cmd == RTC_AIE_ON) ? 1 : 0);
-		return 0;
-
-	case RTC_PIE_OFF:
-	case RTC_PIE_ON:
-		s3c2410_rtc_setpie((cmd == RTC_PIE_ON) ? 1 : 0);
-		return 0;
-
-	case RTC_IRQP_READ:
-		return put_user(s3c2410_rtc_freq, (unsigned long __user *)arg);
-
-	case RTC_IRQP_SET:
-		if (arg < 1 || arg > 64)
-			return -EINVAL;
-
-		if (!capable(CAP_SYS_RESOURCE))
-			return -EACCES;
-
-		/* check for power of 2 */
-
-		if ((arg & (arg-1)) != 0)
-			return -EINVAL;
-
-		pr_debug("s3c2410_rtc: setting frequency %ld\n", arg);
-
-		s3c2410_rtc_setfreq(arg);
-		return 0;
-
-	case RTC_UIE_ON:
-	case RTC_UIE_OFF:
-		return -EINVAL;
-	}
-
-	return -EINVAL;
-}
-
-static int s3c2410_rtc_proc(char *buf)
-{
-	unsigned int rtcalm = readb(S3C2410_RTCALM);
-	unsigned int ticnt = readb (S3C2410_TICNT);
-	char *p = buf;
-
-	p += sprintf(p, "alarm_IRQ\t: %s\n",
-		     (rtcalm & S3C2410_RTCALM_ALMEN) ? "yes" : "no" );
-	p += sprintf(p, "periodic_IRQ\t: %s\n",
-		     (ticnt & S3C2410_TICNT_ENABLE) ? "yes" : "no" );
-	p += sprintf(p, "periodic_freq\t: %d\n", s3c2410_rtc_freq);
-
-	return p - buf;
-}
-
-static int s3c2410_rtc_open(void)
-{
-	int ret;
-
-	ret = request_irq(s3c2410_rtc_alarmno, s3c2410_rtc_alarmirq,
-			  IRQF_DISABLED,  "s3c2410-rtc alarm", NULL);
-
-	if (ret)
-		printk(KERN_ERR "IRQ%d already in use\n", s3c2410_rtc_alarmno);
-
-	ret = request_irq(s3c2410_rtc_tickno, s3c2410_rtc_tickirq,
-			  IRQF_DISABLED,  "s3c2410-rtc tick", NULL);
-
-	if (ret) {
-		printk(KERN_ERR "IRQ%d already in use\n", s3c2410_rtc_tickno);
-		goto tick_err;
-	}
-
-	return ret;
-
- tick_err:
-	free_irq(s3c2410_rtc_alarmno, NULL);
-	return ret;
-}
-
-static void s3c2410_rtc_release(void)
-{
-	/* do not clear AIE here, it may be needed for wake */
-
-	s3c2410_rtc_setpie(0);
-	free_irq(s3c2410_rtc_alarmno, NULL);
-	free_irq(s3c2410_rtc_tickno, NULL);
-}
-
-static struct rtc_ops s3c2410_rtcops = {
-	.owner		= THIS_MODULE,
-	.open		= s3c2410_rtc_open,
-	.release	= s3c2410_rtc_release,
-	.ioctl		= s3c2410_rtc_ioctl,
-	.read_time	= s3c2410_rtc_gettime,
-	.set_time	= s3c2410_rtc_settime,
-	.read_alarm	= s3c2410_rtc_getalarm,
-	.set_alarm	= s3c2410_rtc_setalarm,
-	.proc	        = s3c2410_rtc_proc,
-};
-
-static void s3c2410_rtc_enable(struct platform_device *pdev, int en)
-{
-	unsigned int tmp;
-
-	if (s3c2410_rtc_base == NULL)
-		return;
-
-	if (!en) {
-		tmp = readb(S3C2410_RTCCON);
-		writeb(tmp & ~S3C2410_RTCCON_RTCEN, S3C2410_RTCCON);
-
-		tmp = readb(S3C2410_TICNT);
-		writeb(tmp & ~S3C2410_TICNT_ENABLE, S3C2410_TICNT);
-	} else {
-		/* re-enable the device, and check it is ok */
-
-		if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0){
-			dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
-
-			tmp = readb(S3C2410_RTCCON);
-			writeb(tmp | S3C2410_RTCCON_RTCEN , S3C2410_RTCCON);
-		}
-
-		if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)){
-			dev_info(&pdev->dev, "removing S3C2410_RTCCON_CNTSEL\n");
-
-			tmp = readb(S3C2410_RTCCON);
-			writeb(tmp& ~S3C2410_RTCCON_CNTSEL , S3C2410_RTCCON);
-		}
-
-		if ((readb(S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)){
-			dev_info(&pdev->dev, "removing S3C2410_RTCCON_CLKRST\n");
-
-			tmp = readb(S3C2410_RTCCON);
-			writeb(tmp & ~S3C2410_RTCCON_CLKRST, S3C2410_RTCCON);
-		}
-	}
-}
-
-static int s3c2410_rtc_remove(struct platform_device *dev)
-{
-	unregister_rtc(&s3c2410_rtcops);
-
-	s3c2410_rtc_setpie(0);
-	s3c2410_rtc_setaie(0);
-
-	if (s3c2410_rtc_mem != NULL) {
-		pr_debug("s3c2410_rtc: releasing s3c2410_rtc_mem\n");
-		iounmap(s3c2410_rtc_base);
-		release_resource(s3c2410_rtc_mem);
-		kfree(s3c2410_rtc_mem);
-	}
-
-	return 0;
-}
-
-static int s3c2410_rtc_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	int ret;
-
-	pr_debug("%s: probe=%p\n", __FUNCTION__, pdev);
-
-	/* find the IRQs */
-
-	s3c2410_rtc_tickno = platform_get_irq(pdev, 1);
-	if (s3c2410_rtc_tickno < 0) {
-		dev_err(&pdev->dev, "no irq for rtc tick\n");
-		return -ENOENT;
-	}
-
-	s3c2410_rtc_alarmno = platform_get_irq(pdev, 0);
-	if (s3c2410_rtc_alarmno < 0) {
-		dev_err(&pdev->dev, "no irq for alarm\n");
-		return -ENOENT;
-	}
-
-	pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n",
-		 s3c2410_rtc_tickno, s3c2410_rtc_alarmno);
-
-	/* get the memory region */
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to get memory region resource\n");
-		return -ENOENT;
-	}
-
-	s3c2410_rtc_mem = request_mem_region(res->start, res->end-res->start+1,
-				     pdev->name);
-
-	if (s3c2410_rtc_mem == NULL) {
-		dev_err(&pdev->dev, "failed to reserve memory region\n");
-		ret = -ENOENT;
-		goto exit_err;
-	}
-
-	s3c2410_rtc_base = ioremap(res->start, res->end - res->start + 1);
-	if (s3c2410_rtc_base == NULL) {
-		dev_err(&pdev->dev, "failed ioremap()\n");
-		ret = -EINVAL;
-		goto exit_err;
-	}
-
-	s3c2410_rtc_mem = res;
-	pr_debug("s3c2410_rtc_base=%p\n", s3c2410_rtc_base);
-
- 	pr_debug("s3c2410_rtc: RTCCON=%02x\n", readb(S3C2410_RTCCON));
-
-	/* check to see if everything is setup correctly */
-
-	s3c2410_rtc_enable(pdev, 1);
-
- 	pr_debug("s3c2410_rtc: RTCCON=%02x\n", readb(S3C2410_RTCCON));
-
-	s3c2410_rtc_setfreq(s3c2410_rtc_freq);
-
-	/* register RTC and exit */
-
-	register_rtc(&s3c2410_rtcops);
-	return 0;
-
- exit_err:
-	dev_err(&pdev->dev, "error %d during initialisation\n", ret);
-
-	return ret;
-}
-
-#ifdef CONFIG_PM
-
-/* S3C2410 RTC Power management control */
-
-static struct timespec s3c2410_rtc_delta;
-
-static int ticnt_save;
-
-static int s3c2410_rtc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct rtc_time tm;
-	struct timespec time;
-
-	time.tv_nsec = 0;
-
-	/* save TICNT for anyone using periodic interrupts */
-
-	ticnt_save = readb(S3C2410_TICNT);
-
-	/* calculate time delta for suspend */
-
-	s3c2410_rtc_gettime(&tm);
-	rtc_tm_to_time(&tm, &time.tv_sec);
-	save_time_delta(&s3c2410_rtc_delta, &time);
-	s3c2410_rtc_enable(pdev, 0);
-
-	return 0;
-}
-
-static int s3c2410_rtc_resume(struct platform_device *pdev)
-{
-	struct rtc_time tm;
-	struct timespec time;
-
-	time.tv_nsec = 0;
-
-	s3c2410_rtc_enable(pdev, 1);
-	s3c2410_rtc_gettime(&tm);
-	rtc_tm_to_time(&tm, &time.tv_sec);
-	restore_time_delta(&s3c2410_rtc_delta, &time);
-
-	writeb(ticnt_save, S3C2410_TICNT);
-	return 0;
-}
-#else
-#define s3c2410_rtc_suspend NULL
-#define s3c2410_rtc_resume  NULL
-#endif
-
-static struct platform_driver s3c2410_rtcdrv = {
-	.probe		= s3c2410_rtc_probe,
-	.remove		= s3c2410_rtc_remove,
-	.suspend	= s3c2410_rtc_suspend,
-	.resume		= s3c2410_rtc_resume,
-	.driver		= {
-		.name	= "s3c2410-rtc",
-		.owner	= THIS_MODULE,
-	},
-};
-
-static char __initdata banner[] = "S3C2410 RTC, (c) 2004 Simtec Electronics\n";
-
-static int __init s3c2410_rtc_init(void)
-{
-	printk(banner);
-	return platform_driver_register(&s3c2410_rtcdrv);
-}
-
-static void __exit s3c2410_rtc_exit(void)
-{
-	platform_driver_unregister(&s3c2410_rtcdrv);
-}
-
-module_init(s3c2410_rtc_init);
-module_exit(s3c2410_rtc_exit);
-
-MODULE_DESCRIPTION("S3C24XX RTC Driver");
-MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
-MODULE_LICENSE("GPL");