Merge branch 'master' of git://www.denx.de/git/u-boot-imx

[J-u-boot.git] / drivers / rtc / pcf8563.c

diff --git a/drivers/rtc/pcf8563.c b/drivers/rtc/pcf8563.c
index 2d73d5d7ef965728dc6d4781d951ca0813351ce5..25fa7c5b118eb2383dc246f3ab364db493260beb 100644 (file)
--- a/drivers/rtc/pcf8563.c
+++ b/drivers/rtc/pcf8563.c
@@ -2,23 +2,7 @@
  * (C) Copyright 2001
  * Wolfgang Denk, DENX Software Engineering, [email protected].
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 /*
@@ -32,17 +16,16 @@
 #include <rtc.h>
 #include <i2c.h>
 
-#if defined(CONFIG_RTC_PCF8563) && defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 
 static uchar rtc_read  (uchar reg);
 static void  rtc_write (uchar reg, uchar val);
-static uchar bin2bcd   (unsigned int n);
-static unsigned bcd2bin(uchar c);
 
 /* ------------------------------------------------------------------------- */
 
-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;
 
        sec     = rtc_read (0x02);
@@ -65,6 +48,7 @@ void rtc_get (struct rtc_time *tmp)
 
        if (sec & 0x80) {
                puts ("### Warning: RTC Low Voltage - date/time not reliable\n");
+               rel = -1;
        }
 
        tmp->tm_sec  = bcd2bin (sec  & 0x7F);
@@ -72,7 +56,7 @@ void rtc_get (struct rtc_time *tmp)
        tmp->tm_hour = bcd2bin (hour & 0x3F);
        tmp->tm_mday = bcd2bin (mday & 0x3F);
        tmp->tm_mon  = bcd2bin (mon_cent & 0x1F);
-       tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 2000 : 1900);
+       tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000);
        tmp->tm_wday = bcd2bin (wday & 0x07);
        tmp->tm_yday = 0;
        tmp->tm_isdst= 0;
@@ -80,9 +64,11 @@ void rtc_get (struct rtc_time *tmp)
        debug ( "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;
 }
 
-void rtc_set (struct rtc_time *tmp)
+int rtc_set (struct rtc_time *tmp)
 {
        uchar century;
 
@@ -92,7 +78,7 @@ void rtc_set (struct rtc_time *tmp)
 
        rtc_write (0x08, bin2bcd(tmp->tm_year % 100));
 
-       century = (tmp->tm_year >= 2000) ? 0x80 : 0;
+       century = (tmp->tm_year >= 2000) ? 0 : 0x80;
        rtc_write (0x07, bin2bcd(tmp->tm_mon) | century);
 
        rtc_write (0x06, bin2bcd(tmp->tm_wday));
@@ -100,6 +86,8 @@ void rtc_set (struct rtc_time *tmp)
        rtc_write (0x04, bin2bcd(tmp->tm_hour));
        rtc_write (0x03, bin2bcd(tmp->tm_min ));
        rtc_write (0x02, bin2bcd(tmp->tm_sec ));
+
+       return 0;
 }
 
 void rtc_reset (void)
@@ -123,22 +111,12 @@ 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);
-}
-
-static unsigned bcd2bin (uchar n)
-{
-       return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
-}
-
-static unsigned char bin2bcd (unsigned int n)
-{
-       return (((n / 10) << 4) | (n % 10));
+       i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
 }
 
 #endif