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Commit 9c75fc8c authored by Jesper Nilsson's avatar Jesper Nilsson
Browse files

CRIS: Remove legacy RTC drivers 



These old drivers are not used anymore, we use the ones in drivers/rtc.
This allows us to remove some cruft in the CRIS timekeeping code.

Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
parent 4d5914d6

arch/cris/arch-v10/drivers/ds1302.c

deleted100644 → 0
+0 −515
Original line number Diff line number Diff line 
/*!***************************************************************************

*!

*! FILE NAME  : ds1302.c

*!

*! DESCRIPTION: Implements an interface for the DS1302 RTC through Etrax I/O

*!

*! Functions exported: ds1302_readreg, ds1302_writereg, ds1302_init

*!

*! ---------------------------------------------------------------------------

*!

*! (C) Copyright 1999-2007 Axis Communications AB, LUND, SWEDEN

*!

*!***************************************************************************/





#include <linux/fs.h>

#include <linux/init.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/miscdevice.h>

#include <linux/delay.h>

#include <linux/mutex.h>

#include <linux/bcd.h>

#include <linux/capability.h>



#include <asm/uaccess.h>

#include <arch/svinto.h>

#include <asm/io.h>

#include <asm/rtc.h>

#include <arch/io_interface_mux.h>



#include "i2c.h"



#define RTC_MAJOR_NR 121 /* local major, change later */



static DEFINE_MUTEX(ds1302_mutex);

static const char ds1302_name[] = "ds1302";



/* The DS1302 might be connected to different bits on different products. 

 * It has three signals - SDA, SCL and RST. RST and SCL are always outputs,

 * but SDA can have a selected direction.

 * For now, only PORT_PB is hardcoded.

 */



/* The RST bit may be on either the Generic Port or Port PB. */

#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT

#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_G_DATA,  port_g_data_shadow,  CONFIG_ETRAX_DS1302_RSTBIT, x)

#define TK_RST_DIR(x)

#else

#define TK_RST_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_RSTBIT, x)

#define TK_RST_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR,  port_pb_dir_shadow,  CONFIG_ETRAX_DS1302_RSTBIT, x)

#endif





#define TK_SDA_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SDABIT, x)

#define TK_SCL_OUT(x) REG_SHADOW_SET(R_PORT_PB_DATA, port_pb_data_shadow, CONFIG_ETRAX_DS1302_SCLBIT, x)



#define TK_SDA_IN()   ((*R_PORT_PB_READ >> CONFIG_ETRAX_DS1302_SDABIT) & 1)

/* 1 is out, 0 is in */

#define TK_SDA_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR,  port_pb_dir_shadow,  CONFIG_ETRAX_DS1302_SDABIT, x)

#define TK_SCL_DIR(x) REG_SHADOW_SET(R_PORT_PB_DIR,  port_pb_dir_shadow,  CONFIG_ETRAX_DS1302_SCLBIT, x)





/*

 * The reason for tempudelay and not udelay is that loops_per_usec

 * (used in udelay) is not set when functions here are called from time.c 

 */



static void tempudelay(int usecs) 

{

	volatile int loops;



	for(loops = usecs * 12; loops > 0; loops--)

		/* nothing */;	

}





/* Send 8 bits. */

static void

out_byte(unsigned char x) 

{

	int i;

	TK_SDA_DIR(1);

	for (i = 8; i--;) {

		/* The chip latches incoming bits on the rising edge of SCL. */

		TK_SCL_OUT(0);

		TK_SDA_OUT(x & 1);

		tempudelay(1);

		TK_SCL_OUT(1);

		tempudelay(1);

		x >>= 1;

	}

	TK_SDA_DIR(0);

}



static unsigned char

in_byte(void) 

{

	unsigned char x = 0;

	int i;



	/* Read byte. Bits come LSB first, on the falling edge of SCL.

	 * Assume SDA is in input direction already.

	 */

	TK_SDA_DIR(0);



	for (i = 8; i--;) {

		TK_SCL_OUT(0);

		tempudelay(1);

		x >>= 1;

		x |= (TK_SDA_IN() << 7);

		TK_SCL_OUT(1);

		tempudelay(1);

	}



	return x;

}



/* Prepares for a transaction by de-activating RST (active-low). */



static void

start(void) 

{

	TK_SCL_OUT(0);

	tempudelay(1);

	TK_RST_OUT(0);

	tempudelay(5);

	TK_RST_OUT(1);	

}



/* Ends a transaction by taking RST active again. */



static void

stop(void) 

{

	tempudelay(2);

	TK_RST_OUT(0);

}



/* Enable writing. */



static void

ds1302_wenable(void) 

{

	start(); 	

	out_byte(0x8e); /* Write control register  */

	out_byte(0x00); /* Disable write protect bit 7 = 0 */

	stop();

}



/* Disable writing. */



static void

ds1302_wdisable(void) 

{

	start();

	out_byte(0x8e); /* Write control register  */

	out_byte(0x80); /* Disable write protect bit 7 = 0 */

	stop();

}







/* Read a byte from the selected register in the DS1302. */



unsigned char

ds1302_readreg(int reg) 

{

	unsigned char x;



	start();

	out_byte(0x81 | (reg << 1)); /* read register */

	x = in_byte();

	stop();



	return x;

}



/* Write a byte to the selected register. */



void

ds1302_writereg(int reg, unsigned char val) 

{

#ifndef CONFIG_ETRAX_RTC_READONLY

	int do_writereg = 1;

#else

	int do_writereg = 0;



	if (reg == RTC_TRICKLECHARGER)

		do_writereg = 1;

#endif



	if (do_writereg) {

		ds1302_wenable();

		start();

		out_byte(0x80 | (reg << 1)); /* write register */

		out_byte(val);

		stop();

		ds1302_wdisable();

	}

}



void

get_rtc_time(struct rtc_time *rtc_tm) 

{

	unsigned long flags;



	local_irq_save(flags);



	rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);

	rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);

	rtc_tm->tm_hour = CMOS_READ(RTC_HOURS);

	rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);

	rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);

	rtc_tm->tm_year = CMOS_READ(RTC_YEAR);



	local_irq_restore(flags);

	

	rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);

	rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);

	rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);

	rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);

	rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);

	rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);



	/*

	 * Account for differences between how the RTC uses the values

	 * and how they are defined in a struct rtc_time;

	 */



	if (rtc_tm->tm_year <= 69)

		rtc_tm->tm_year += 100;



	rtc_tm->tm_mon--;

}



static unsigned char days_in_mo[] = 

    {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};



/* ioctl that supports RTC_RD_TIME and RTC_SET_TIME (read and set time/date). */



static int rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

{

	unsigned long flags;



	switch(cmd) {

		case RTC_RD_TIME:	/* read the time/date from RTC	*/

		{

			struct rtc_time rtc_tm;

						

			memset(&rtc_tm, 0, sizeof (struct rtc_time));

			get_rtc_time(&rtc_tm);						

			if (copy_to_user((struct rtc_time*)arg, &rtc_tm, sizeof(struct rtc_time)))

				return -EFAULT;	

			return 0;

		}



		case RTC_SET_TIME:	/* set the RTC */

		{

			struct rtc_time rtc_tm;

			unsigned char mon, day, hrs, min, sec, leap_yr;

			unsigned int yrs;



			if (!capable(CAP_SYS_TIME))

				return -EPERM;



			if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, sizeof(struct rtc_time)))

				return -EFAULT;



			yrs = rtc_tm.tm_year + 1900;

			mon = rtc_tm.tm_mon + 1;   /* tm_mon starts at zero */

			day = rtc_tm.tm_mday;

			hrs = rtc_tm.tm_hour;

			min = rtc_tm.tm_min;

			sec = rtc_tm.tm_sec;

			

			

			if ((yrs < 1970) || (yrs > 2069))

				return -EINVAL;



			leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));



			if ((mon > 12) || (day == 0))

				return -EINVAL;



			if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))

				return -EINVAL;

			

			if ((hrs >= 24) || (min >= 60) || (sec >= 60))

				return -EINVAL;



			if (yrs >= 2000)

				yrs -= 2000;	/* RTC (0, 1, ... 69) */

			else

				yrs -= 1900;	/* RTC (70, 71, ... 99) */



			sec = bin2bcd(sec);

			min = bin2bcd(min);

			hrs = bin2bcd(hrs);

			day = bin2bcd(day);

			mon = bin2bcd(mon);

			yrs = bin2bcd(yrs);



			local_irq_save(flags);

			CMOS_WRITE(yrs, RTC_YEAR);

			CMOS_WRITE(mon, RTC_MONTH);

			CMOS_WRITE(day, RTC_DAY_OF_MONTH);

			CMOS_WRITE(hrs, RTC_HOURS);

			CMOS_WRITE(min, RTC_MINUTES);

			CMOS_WRITE(sec, RTC_SECONDS);

			local_irq_restore(flags);



			/* Notice that at this point, the RTC is updated but

			 * the kernel is still running with the old time.

			 * You need to set that separately with settimeofday

			 * or adjtimex.

			 */

			return 0;

		}



		case RTC_SET_CHARGE: /* set the RTC TRICKLE CHARGE register */

		{

			int tcs_val;



			if (!capable(CAP_SYS_TIME))

				return -EPERM;

			

			if(copy_from_user(&tcs_val, (int*)arg, sizeof(int)))

				return -EFAULT;



			tcs_val = RTC_TCR_PATTERN | (tcs_val & 0x0F);

			ds1302_writereg(RTC_TRICKLECHARGER, tcs_val);

			return 0;

		}

		case RTC_VL_READ:

		{

			/* TODO:

			 * Implement voltage low detection support

			 */

			printk(KERN_WARNING "DS1302: RTC Voltage Low detection"

			       " is not supported\n");

			return 0;

		}

		case RTC_VL_CLR:

		{

			/* TODO:

			 * Nothing to do since Voltage Low detection is not supported

			 */

			return 0;

		}

		default:

			return -ENOIOCTLCMD;

	}

}



static long rtc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

{

	int ret;



	mutex_lock(&ds1302_mutex);

	ret = rtc_ioctl(file, cmd, arg);

	mutex_unlock(&ds1302_mutex);



	return ret;

}



static void

print_rtc_status(void)

{

	struct rtc_time tm;



	get_rtc_time(&tm);



	/*

	 * There is no way to tell if the luser has the RTC set for local

	 * time or for Universal Standard Time (GMT). Probably local though.

	 */



	printk(KERN_INFO "rtc_time\t: %02d:%02d:%02d\n",

	       tm.tm_hour, tm.tm_min, tm.tm_sec);

	printk(KERN_INFO "rtc_date\t: %04d-%02d-%02d\n",

	       tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);

}



/* The various file operations we support. */



static const struct file_operations rtc_fops = {

	.owner		= THIS_MODULE,

	.unlocked_ioctl = rtc_unlocked_ioctl,

	.llseek		= noop_llseek,

}; 



/* Probe for the chip by writing something to its RAM and try reading it back. */



#define MAGIC_PATTERN 0x42



static int __init

ds1302_probe(void) 

{

	int retval, res; 



	TK_RST_DIR(1);

	TK_SCL_DIR(1);

	TK_SDA_DIR(0);

	

	/* Try to talk to timekeeper. */



	ds1302_wenable();  

	start();

	out_byte(0xc0); /* write RAM byte 0 */	

	out_byte(MAGIC_PATTERN); /* write something magic */

	start();

	out_byte(0xc1); /* read RAM byte 0 */



	if((res = in_byte()) == MAGIC_PATTERN) {

		stop();

		ds1302_wdisable();

		printk(KERN_INFO "%s: RTC found.\n", ds1302_name);

		printk(KERN_INFO "%s: SDA, SCL, RST on PB%i, PB%i, %s%i\n",

		       ds1302_name,

		       CONFIG_ETRAX_DS1302_SDABIT,

		       CONFIG_ETRAX_DS1302_SCLBIT,

#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT

		       "GENIO",

#else

		       "PB",

#endif

		       CONFIG_ETRAX_DS1302_RSTBIT);

		       print_rtc_status();

		retval = 1;

	} else {

		stop();

		retval = 0;

	}



	return retval;

}





/* Just probe for the RTC and register the device to handle the ioctl needed. */



int __init

ds1302_init(void) 

{

#ifdef CONFIG_ETRAX_I2C

	i2c_init();

#endif



	if (!ds1302_probe()) {

#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT

#if CONFIG_ETRAX_DS1302_RSTBIT == 27

		/*

		 * The only way to set g27 to output is to enable ATA.

		 *

		 * Make sure that R_GEN_CONFIG is setup correct.

		 */

		/* Allocating the ATA interface will grab almost all

		 * pins in I/O groups a, b, c and d.  A consequence of

		 * allocating the ATA interface is that the fixed

		 * interfaces shared RAM, parallel port 0, parallel

		 * port 1, parallel port W, SCSI-8 port 0, SCSI-8 port

		 * 1, SCSI-W, serial port 2, serial port 3,

		 * synchronous serial port 3 and USB port 2 and almost

		 * all GPIO pins on port g cannot be used.

		 */

		if (cris_request_io_interface(if_ata, "ds1302/ATA")) {

			printk(KERN_WARNING "ds1302: Failed to get IO interface\n");

			return -1;

		}



#elif CONFIG_ETRAX_DS1302_RSTBIT == 0

		if (cris_io_interface_allocate_pins(if_gpio_grp_a,

						    'g',

						    CONFIG_ETRAX_DS1302_RSTBIT,

						    CONFIG_ETRAX_DS1302_RSTBIT)) {

			printk(KERN_WARNING "ds1302: Failed to get IO interface\n");

			return -1;

		}



		/* Set the direction of this bit to out. */

		genconfig_shadow = ((genconfig_shadow &

 				     ~IO_MASK(R_GEN_CONFIG, g0dir)) |

 				   (IO_STATE(R_GEN_CONFIG, g0dir, out)));

		*R_GEN_CONFIG = genconfig_shadow;

#endif

		if (!ds1302_probe()) {

			printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);

			return -1;

		}

#else

		printk(KERN_WARNING "%s: RTC not found.\n", ds1302_name);

		return -1;

#endif

  	}

	/* Initialise trickle charger */

	ds1302_writereg(RTC_TRICKLECHARGER,

			RTC_TCR_PATTERN |(CONFIG_ETRAX_DS1302_TRICKLE_CHARGE & 0x0F));

        /* Start clock by resetting CLOCK_HALT */

	ds1302_writereg(RTC_SECONDS, (ds1302_readreg(RTC_SECONDS) & 0x7F));

	return 0;

}



static int __init ds1302_register(void)

{

	ds1302_init();

	if (register_chrdev(RTC_MAJOR_NR, ds1302_name, &rtc_fops)) {

		printk(KERN_INFO "%s: unable to get major %d for rtc\n", 

		       ds1302_name, RTC_MAJOR_NR);

		return -1;

	}

        return 0;



}



module_init(ds1302_register);

arch/cris/arch-v10/drivers/pcf8563.c

deleted100644 → 0
+0 −380
Original line number Diff line number Diff line 
/*

 * PCF8563 RTC

 *

 * From Phillips' datasheet:

 *

 * The PCF8563 is a CMOS real-time clock/calendar optimized for low power

 * consumption. A programmable clock output, interrupt output and voltage

 * low detector are also provided. All address and data are transferred

 * serially via two-line bidirectional I2C-bus. Maximum bus speed is

 * 400 kbits/s. The built-in word address register is incremented

 * automatically after each written or read byte.

 *

 * Copyright (c) 2002-2007, Axis Communications AB

 * All rights reserved.

 *

 * Author: Tobias Anderberg <tobiasa@axis.com>.

 *

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/sched.h>

#include <linux/init.h>

#include <linux/fs.h>

#include <linux/ioctl.h>

#include <linux/delay.h>

#include <linux/bcd.h>

#include <linux/mutex.h>



#include <asm/uaccess.h>

#include <asm/io.h>

#include <asm/rtc.h>



#include "i2c.h"



#define PCF8563_MAJOR 121	/* Local major number. */

#define DEVICE_NAME "rtc"	/* Name which is registered in /proc/devices. */

#define PCF8563_NAME "PCF8563"

#define DRIVER_VERSION "$Revision: 1.24 $"



/* I2C bus slave registers. */

#define RTC_I2C_READ		0xa3

#define RTC_I2C_WRITE		0xa2



/* Two simple wrapper macros, saves a few keystrokes. */

#define rtc_read(x) i2c_readreg(RTC_I2C_READ, x)

#define rtc_write(x,y) i2c_writereg(RTC_I2C_WRITE, x, y)



static DEFINE_MUTEX(pcf8563_mutex);

static DEFINE_MUTEX(rtc_lock); /* Protect state etc */



static const unsigned char days_in_month[] =

	{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };



static long pcf8563_unlocked_ioctl(struct file *, unsigned int, unsigned long);



/* Cache VL bit value read at driver init since writing the RTC_SECOND

 * register clears the VL status.

 */

static int voltage_low;



static const struct file_operations pcf8563_fops = {

	.owner = THIS_MODULE,

	.unlocked_ioctl = pcf8563_unlocked_ioctl,

	.llseek		= noop_llseek,

};



unsigned char

pcf8563_readreg(int reg)

{

	unsigned char res = rtc_read(reg);



	/* The PCF8563 does not return 0 for unimplemented bits. */

	switch (reg) {

	case RTC_SECONDS:

	case RTC_MINUTES:

		res &= 0x7F;

		break;

	case RTC_HOURS:

	case RTC_DAY_OF_MONTH:

		res &= 0x3F;

		break;

	case RTC_WEEKDAY:

		res &= 0x07;

		break;

	case RTC_MONTH:

		res &= 0x1F;

		break;

	case RTC_CONTROL1:

		res &= 0xA8;

		break;

	case RTC_CONTROL2:

		res &= 0x1F;

		break;

	case RTC_CLOCKOUT_FREQ:

	case RTC_TIMER_CONTROL:

		res &= 0x83;

		break;

	}

	return res;

}



void

pcf8563_writereg(int reg, unsigned char val)

{

	rtc_write(reg, val);

}



void

get_rtc_time(struct rtc_time *tm)

{

	tm->tm_sec  = rtc_read(RTC_SECONDS);

	tm->tm_min  = rtc_read(RTC_MINUTES);

	tm->tm_hour = rtc_read(RTC_HOURS);

	tm->tm_mday = rtc_read(RTC_DAY_OF_MONTH);

	tm->tm_wday = rtc_read(RTC_WEEKDAY);

	tm->tm_mon  = rtc_read(RTC_MONTH);

	tm->tm_year = rtc_read(RTC_YEAR);



	if (tm->tm_sec & 0x80) {

		printk(KERN_ERR "%s: RTC Voltage Low - reliable date/time "

		       "information is no longer guaranteed!\n", PCF8563_NAME);

	}



	tm->tm_year  = bcd2bin(tm->tm_year) +

		       ((tm->tm_mon & 0x80) ? 100 : 0);

	tm->tm_sec  &= 0x7F;

	tm->tm_min  &= 0x7F;

	tm->tm_hour &= 0x3F;

	tm->tm_mday &= 0x3F;

	tm->tm_wday &= 0x07; /* Not coded in BCD. */

	tm->tm_mon  &= 0x1F;



	tm->tm_sec = bcd2bin(tm->tm_sec);

	tm->tm_min = bcd2bin(tm->tm_min);

	tm->tm_hour = bcd2bin(tm->tm_hour);

	tm->tm_mday = bcd2bin(tm->tm_mday);

	tm->tm_mon = bcd2bin(tm->tm_mon);

	tm->tm_mon--; /* Month is 1..12 in RTC but 0..11 in linux */

}



int __init

pcf8563_init(void)

{

	static int res;

	static int first = 1;



	if (!first)

		return res;

	first = 0;



	/* Initiate the i2c protocol. */

	res = i2c_init();

	if (res < 0) {

		printk(KERN_CRIT "pcf8563_init: Failed to init i2c.\n");

		return res;

	}



	/*

	 * First of all we need to reset the chip. This is done by

	 * clearing control1, control2 and clk freq and resetting

	 * all alarms.

	 */

	if (rtc_write(RTC_CONTROL1, 0x00) < 0)

		goto err;



	if (rtc_write(RTC_CONTROL2, 0x00) < 0)

		goto err;



	if (rtc_write(RTC_CLOCKOUT_FREQ, 0x00) < 0)

		goto err;



	if (rtc_write(RTC_TIMER_CONTROL, 0x03) < 0)

		goto err;



	/* Reset the alarms. */

	if (rtc_write(RTC_MINUTE_ALARM, 0x80) < 0)

		goto err;



	if (rtc_write(RTC_HOUR_ALARM, 0x80) < 0)

		goto err;



	if (rtc_write(RTC_DAY_ALARM, 0x80) < 0)

		goto err;



	if (rtc_write(RTC_WEEKDAY_ALARM, 0x80) < 0)

		goto err;



	/* Check for low voltage, and warn about it. */

	if (rtc_read(RTC_SECONDS) & 0x80) {

		voltage_low = 1;

		printk(KERN_WARNING "%s: RTC Voltage Low - reliable "

		       "date/time information is no longer guaranteed!\n",

		       PCF8563_NAME);

	}



	return res;



err:

	printk(KERN_INFO "%s: Error initializing chip.\n", PCF8563_NAME);

	res = -1;

	return res;

}



void __exit

pcf8563_exit(void)

{

	unregister_chrdev(PCF8563_MAJOR, DEVICE_NAME);

}



/*

 * ioctl calls for this driver. Why return -ENOTTY upon error? Because

 * POSIX says so!

 */

static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	/* Some sanity checks. */

	if (_IOC_TYPE(cmd) != RTC_MAGIC)

		return -ENOTTY;



	if (_IOC_NR(cmd) > RTC_MAX_IOCTL)

		return -ENOTTY;



	switch (cmd) {

	case RTC_RD_TIME:

	{

		struct rtc_time tm;



		mutex_lock(&rtc_lock);

		memset(&tm, 0, sizeof tm);

		get_rtc_time(&tm);



		if (copy_to_user((struct rtc_time *) arg, &tm,

				 sizeof tm)) {

			mutex_unlock(&rtc_lock);

			return -EFAULT;

		}



		mutex_unlock(&rtc_lock);



		return 0;

	}

	case RTC_SET_TIME:

	{

		int leap;

		int year;

		int century;

		struct rtc_time tm;



		memset(&tm, 0, sizeof tm);

		if (!capable(CAP_SYS_TIME))

			return -EPERM;



		if (copy_from_user(&tm, (struct rtc_time *) arg, sizeof tm))

			return -EFAULT;



		/* Convert from struct tm to struct rtc_time. */

		tm.tm_year += 1900;

		tm.tm_mon += 1;



		/*

		 * Check if tm.tm_year is a leap year. A year is a leap

		 * year if it is divisible by 4 but not 100, except

		 * that years divisible by 400 _are_ leap years.

		 */

		year = tm.tm_year;

		leap = (tm.tm_mon == 2) &&

			((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);



		/* Perform some sanity checks. */

		if ((tm.tm_year < 1970) ||

		    (tm.tm_mon > 12) ||

		    (tm.tm_mday == 0) ||

		    (tm.tm_mday > days_in_month[tm.tm_mon] + leap) ||

		    (tm.tm_wday >= 7) ||

		    (tm.tm_hour >= 24) ||

		    (tm.tm_min >= 60) ||

		    (tm.tm_sec >= 60))

			return -EINVAL;



		century = (tm.tm_year >= 2000) ? 0x80 : 0;

		tm.tm_year = tm.tm_year % 100;



		tm.tm_year = bin2bcd(tm.tm_year);

		tm.tm_mon = bin2bcd(tm.tm_mon);

		tm.tm_mday = bin2bcd(tm.tm_mday);

		tm.tm_hour = bin2bcd(tm.tm_hour);

		tm.tm_min = bin2bcd(tm.tm_min);

		tm.tm_sec = bin2bcd(tm.tm_sec);

		tm.tm_mon |= century;



		mutex_lock(&rtc_lock);



		rtc_write(RTC_YEAR, tm.tm_year);

		rtc_write(RTC_MONTH, tm.tm_mon);

		rtc_write(RTC_WEEKDAY, tm.tm_wday); /* Not coded in BCD. */

		rtc_write(RTC_DAY_OF_MONTH, tm.tm_mday);

		rtc_write(RTC_HOURS, tm.tm_hour);

		rtc_write(RTC_MINUTES, tm.tm_min);

		rtc_write(RTC_SECONDS, tm.tm_sec);



		mutex_unlock(&rtc_lock);



		return 0;

	}

	case RTC_VL_READ:

		if (voltage_low) {

			printk(KERN_ERR "%s: RTC Voltage Low - "

			       "reliable date/time information is no "

			       "longer guaranteed!\n", PCF8563_NAME);

		}



		if (copy_to_user((int *) arg, &voltage_low, sizeof(int)))

			return -EFAULT;

		return 0;



	case RTC_VL_CLR:

	{

		/* Clear the VL bit in the seconds register in case

		 * the time has not been set already (which would

		 * have cleared it). This does not really matter

		 * because of the cached voltage_low value but do it

		 * anyway for consistency. */



		int ret = rtc_read(RTC_SECONDS);



		rtc_write(RTC_SECONDS, (ret & 0x7F));



		/* Clear the cached value. */

		voltage_low = 0;



		return 0;

	}

	default:

		return -ENOTTY;

	}



	return 0;

}



static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	int ret;



	mutex_lock(&pcf8563_mutex);

	ret = pcf8563_ioctl(filp, cmd, arg);

	mutex_unlock(&pcf8563_mutex);



	return ret;

}



static int __init pcf8563_register(void)

{

	if (pcf8563_init() < 0) {

		printk(KERN_INFO "%s: Unable to initialize Real-Time Clock "

		       "Driver, %s\n", PCF8563_NAME, DRIVER_VERSION);

		return -1;

	}



	if (register_chrdev(PCF8563_MAJOR, DEVICE_NAME, &pcf8563_fops) < 0) {

		printk(KERN_INFO "%s: Unable to get major number %d for RTC device.\n",

		       PCF8563_NAME, PCF8563_MAJOR);

		return -1;

	}



	printk(KERN_INFO "%s Real-Time Clock Driver, %s\n", PCF8563_NAME,

	       DRIVER_VERSION);



	/* Check for low voltage, and warn about it. */

	if (voltage_low) {

		printk(KERN_WARNING "%s: RTC Voltage Low - reliable date/time "

		       "information is no longer guaranteed!\n", PCF8563_NAME);

	}



	return 0;

}



module_init(pcf8563_register);

module_exit(pcf8563_exit);

arch/cris/arch-v10/kernel/fasttimer.c

+0 −2
Original line number Diff line number Diff line
@@ -21,8 +21,6 @@ 
#include <asm/io.h>

#include <asm/irq.h>

#include <asm/delay.h>

#include <asm/rtc.h>





#include <arch/svinto.h>

#include <asm/fasttimer.h>

arch/cris/arch-v10/kernel/time.c

+0 −9
Original line number Diff line number Diff line
@@ -19,16 +19,12 @@ 
#include <asm/signal.h>

#include <asm/io.h>

#include <asm/delay.h>

#include <asm/rtc.h>

#include <asm/irq_regs.h>



/* define this if you need to use print_timestamp */

/* it will make jiffies at 96 hz instead of 100 hz though */

#undef USE_CASCADE_TIMERS



extern int set_rtc_mmss(unsigned long nowtime);

extern int have_rtc;



unsigned long get_ns_in_jiffie(void)

{

	unsigned char timer_count, t1;
@@ -203,11 +199,6 @@ time_init(void) 
	 */

	loops_per_usec = 50;



	if(RTC_INIT() < 0)

		have_rtc = 0;

	else

		have_rtc = 1;



	/* Setup the etrax timers

	 * Base frequency is 25000 hz, divider 250 -> 100 HZ

	 * In normal mode, we use timer0, so timer1 is free. In cascade

arch/cris/arch-v32/kernel/time.c

+0 −7
Original line number Diff line number Diff line
@@ -18,7 +18,6 @@ 
#include <asm/signal.h>

#include <asm/io.h>

#include <asm/delay.h>

#include <asm/rtc.h>

#include <asm/irq.h>

#include <asm/irq_regs.h>
@@ -67,7 +66,6 @@ unsigned long timer_regs[NR_CPUS] = 
};



extern int set_rtc_mmss(unsigned long nowtime);

extern int have_rtc;



#ifdef CONFIG_CPU_FREQ

static int
@@ -265,11 +263,6 @@ void __init time_init(void) 
	 */

	loops_per_usec = 50;



	if(RTC_INIT() < 0)

		have_rtc = 0;

	else

		have_rtc = 1;



	/* Start CPU local timer. */

	cris_timer_init();