*
* Author: Tobias Anderberg <tobiasa@axis.com>.
*
- * $Id: pcf8563.c,v 1.4 2004/05/28 09:26:59 starvik Exp $
+ * $Id: pcf8563.c,v 1.11 2005/03/07 13:13:07 starvik Exp $
*/
-#include <linux/config.h>
-#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/delay.h>
#include <linux/bcd.h>
+#include <linux/capability.h>
#include <asm/uaccess.h>
#include <asm/system.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: 1.4 $"
+#define DRIVER_VERSION "$Revision: 1.11 $"
/* I2C bus slave registers. */
#define RTC_I2C_READ 0xa3
/* 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_SPINLOCK(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 };
int __init
pcf8563_init(void)
{
- unsigned char ret;
+ int ret;
- i2c_init();
+ if ((ret = i2c_init())) {
+ printk(KERN_CRIT "pcf8563_init: failed to init i2c\n");
+ return ret;
+ }
/*
* First of all we need to reset the chip. This is done by
{
struct rtc_time tm;
+ spin_lock(&rtc_lock);
get_rtc_time(&tm);
if (copy_to_user((struct rtc_time *) arg, &tm, sizeof(struct rtc_time))) {
+ spin_unlock(&rtc_lock);
return -EFAULT;
}
+ spin_unlock(&rtc_lock);
return 0;
}
break;
BIN_TO_BCD(tm.tm_min);
BIN_TO_BCD(tm.tm_sec);
tm.tm_mon |= century;
+
+ spin_lock(&rtc_lock);
rtc_write(RTC_YEAR, tm.tm_year);
rtc_write(RTC_MONTH, tm.tm_mon);
rtc_write(RTC_MINUTES, tm.tm_min);
rtc_write(RTC_SECONDS, tm.tm_sec);
+ spin_unlock(&rtc_lock);
+
return 0;
#endif /* !CONFIG_ETRAX_RTC_READONLY */
}