rename CFG_ macros to CONFIG_SYS

[karo-tx-uboot.git] / drivers / rtc / ds1337.c

diff --git a/drivers/rtc/ds1337.c b/drivers/rtc/ds1337.c
index c636ac5948f718879a3bd11ebaa588d24a9dc856..58e3966ec7b0937a436e862f3d417b2c13036bc2 100644 (file)
--- a/drivers/rtc/ds1337.c
+++ b/drivers/rtc/ds1337.c
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright 2001, 2002
+ * (C) Copyright 2001-2008
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  * Keith Outwater, keith_outwater@mvis.com`
  *
@@ -32,7 +32,7 @@
 #include <rtc.h>
 #include <i2c.h>
 
-#if defined(CONFIG_RTC_DS1337) && defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 
 /*---------------------------------------------------------------------*/
 #undef DEBUG_RTC
@@ -60,19 +60,19 @@
 /*
  * RTC control register bits
  */
-#define RTC_CTL_BIT_A1IE       0x1     /* Alarm 1 interrupt enable     */
-#define RTC_CTL_BIT_A2IE       0x2     /* Alarm 2 interrupt enable     */
-#define RTC_CTL_BIT_INTCN      0x4     /* Interrupt control            */
-#define RTC_CTL_BIT_RS1                0x8     /* Rate select 1                */
-#define RTC_CTL_BIT_RS2                0x10    /* Rate select 2                */
-#define RTC_CTL_BIT_DOSC       0x80    /* Disable Oscillator           */
+#define RTC_CTL_BIT_A1IE       0x1     /* Alarm 1 interrupt enable     */
+#define RTC_CTL_BIT_A2IE       0x2     /* Alarm 2 interrupt enable     */
+#define RTC_CTL_BIT_INTCN      0x4     /* Interrupt control            */
+#define RTC_CTL_BIT_RS1                0x8     /* Rate select 1                */
+#define RTC_CTL_BIT_RS2                0x10    /* Rate select 2                */
+#define RTC_CTL_BIT_DOSC       0x80    /* Disable Oscillator           */
 
 /*
  * RTC status register bits
  */
-#define RTC_STAT_BIT_A1F       0x1     /* Alarm 1 flag                 */
-#define RTC_STAT_BIT_A2F       0x2     /* Alarm 2 flag                 */
-#define RTC_STAT_BIT_OSF       0x80    /* Oscillator stop flag         */
+#define RTC_STAT_BIT_A1F       0x1     /* Alarm 1 flag                 */
+#define RTC_STAT_BIT_A2F       0x2     /* Alarm 2 flag                 */
+#define RTC_STAT_BIT_OSF       0x80    /* Oscillator stop flag         */
 
 
 static uchar rtc_read (uchar reg);
@@ -84,8 +84,9 @@ static unsigned bcd2bin (uchar c);
 /*
  * Get the current time from the RTC
  */
-void rtc_get (struct rtc_time *tmp)
+int rtc_get (struct rtc_time *tmp)
 {
+       int rel = 0;
        uchar sec, min, hour, mday, wday, mon_cent, year, control, status;
 
        control = rtc_read (RTC_CTL_REG_ADDR);
@@ -107,6 +108,7 @@ void rtc_get (struct rtc_time *tmp)
                /* clear the OSF flag */
                rtc_write (RTC_STAT_REG_ADDR,
                           rtc_read (RTC_STAT_REG_ADDR) & ~RTC_STAT_BIT_OSF);
+               rel = -1;
        }
 
        tmp->tm_sec  = bcd2bin (sec & 0x7F);
@@ -122,13 +124,15 @@ void rtc_get (struct rtc_time *tmp)
        DEBUGR ("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
                tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
                tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+       return rel;
 }
 
 
 /*
  * Set the RTC
  */
-void rtc_set (struct rtc_time *tmp)
+int rtc_set (struct rtc_time *tmp)
 {
        uchar century;
 
@@ -146,6 +150,8 @@ void rtc_set (struct rtc_time *tmp)
        rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
        rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
        rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));
+
+       return 0;
 }
 
 
@@ -154,11 +160,18 @@ void rtc_set (struct rtc_time *tmp)
  * SQW/INTB* pin and program it for 32,768 Hz output. Note that
  * according to the datasheet, turning on the square wave output
  * increases the current drain on the backup battery from about
- * 600 nA to 2uA.
+ * 600 nA to 2uA. Define CONFIG_SYS_RTC_DS1337_NOOSC if you wish to turn
+ * off the OSC output.
  */
+#ifdef CONFIG_SYS_RTC_DS1337_NOOSC
+ #define RTC_DS1337_RESET_VAL \
+       (RTC_CTL_BIT_INTCN | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
+#else
+ #define RTC_DS1337_RESET_VAL (RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2)
+#endif
 void rtc_reset (void)
 {
-       rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2);
+       rtc_write (RTC_CTL_REG_ADDR, RTC_DS1337_RESET_VAL);
 }
 
 
@@ -169,13 +182,13 @@ void rtc_reset (void)
 static
 uchar rtc_read (uchar reg)
 {
-       return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg));
+       return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
 }
 
 
 static void rtc_write (uchar reg, uchar val)
 {
-       i2c_reg_write (CFG_I2C_RTC_ADDR, reg, val);
+       i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
 }
 
 static unsigned bcd2bin (uchar n)