* Patch by Tom Armistead, 04 Jun 2004:

Add support for MAX6900 RTC

* Patches by Ladislav Michl, 03 Jun 2004:
  - fix cfi_flash.c on LE systems
  - let 'make mrproper' delete u-boot.img as well
  - turn printf into debug in cfi_flash.c

CHANGELOG

@@ -2,6 +2,14 @@
 Changes since U-Boot 1.1.1:
 ======================================================================
 
+* Patch by Tom Armistead, 04 Jun 2004:
+  Add support for MAX6900 RTC
+
+* Patches by Ladislav Michl, 03 Jun 2004:
+  - fix cfi_flash.c on LE systems
+  - let 'make mrproper' delete u-boot.img as well
+  - turn printf into debug in cfi_flash.c
+
 * Patch by Kurt Stremerch, 28 May 2004:
   Add support for Exys XSEngine board
 

Makefile

@@ -1338,10 +1338,10 @@ clean:
 	rm -f board/trab/trab_fkt
 
 clobber:	clean
-	find . -type f \
+	find . -type f \( -name .depend \
-		\( -name .depend -o -name '*.srec' -o -name '*.bin' \) \
+		-o -name '*.srec' -o -name '*.bin' -o -name u-boot.img \) \
-		-print \
+		-print0 \
-		| xargs rm -f
+		| xargs -0 rm -f
 	rm -f $(OBJS) *.bak tags TAGS
 	rm -fr *.*~
 	rm -f u-boot u-boot.map $(ALL)

README

@@ -652,6 +652,7 @@ The following options need to be configured:
 		CONFIG_RTC_DS1337	- use Maxim, Inc. DS1337 RTC
 		CONFIG_RTC_DS1338	- use Maxim, Inc. DS1338 RTC
 		CONFIG_RTC_DS164x	- use Dallas DS164x RTC
+		CONFIG_RTC_MAX6900	- use Maxim, Inc. MAX6900 RTC
 
 		Note that if the RTC uses I2C, then the I2C interface
 		must also be configured. See I2C Support, below.

drivers/cfi_flash.c

@@ -46,6 +46,7 @@
 
 #include <common.h>
 #include <asm/processor.h>
+#include <asm/byteorder.h>
 #include <linux/byteorder/swab.h>
 #ifdef	CFG_FLASH_CFI_DRIVER
 
@@ -1038,7 +1039,7 @@ static ulong flash_get_size (ulong base, int banknum)
 				(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
 			tmp >>= 16;
 			erase_region_count = (tmp & 0xffff) + 1;
-			printf ("erase_region_count = %d erase_region_size = %d\n",
+			debug ("erase_region_count = %d erase_region_size = %d\n",
 				erase_region_count, erase_region_size);
 			for (j = 0; j < erase_region_count; j++) {
 				info->start[sect_cnt] = sector;

rtc/Makefile

@@ -30,7 +30,7 @@ LIB	= librtc.a
 OBJS	= date.o   \
 	  ds12887.o ds1302.o ds1306.o ds1307.o ds1337.o \
 	  ds1556.o ds164x.o ds174x.o \
-	  m41t11.o m48t35ax.o mc146818.o mk48t59.o \
+	  m41t11.o max6900.o m48t35ax.o mc146818.o mk48t59.o \
 	  mpc5xxx.o mpc8xx.o pcf8563.o s3c24x0_rtc.o
 
 all:	$(LIB)

rtc/max6900.c

@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+
+/*
+ * Date & Time support for MAXIM MAX6900 RTC
+ */
+
+/* #define	DEBUG	*/
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include <i2c.h>
+
+#if defined(CONFIG_RTC_MAX6900) && (CONFIG_COMMANDS & CFG_CMD_DATE)
+
+#ifndef	CFG_I2C_RTC_ADDR
+#define	CFG_I2C_RTC_ADDR	0x50
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+static uchar rtc_read (uchar reg)
+{
+	return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg));
+}
+
+static void rtc_write (uchar reg, uchar val)
+{
+	i2c_reg_write (CFG_I2C_RTC_ADDR, reg, val);
+	udelay(2500);
+}
+
+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));
+}
+
+/* ------------------------------------------------------------------------- */
+
+void rtc_get (struct rtc_time *tmp)
+{
+	uchar sec, min, hour, mday, wday, mon, cent, year;
+	int retry = 1;
+
+	do {
+		sec	= rtc_read (0x80);
+		min	= rtc_read (0x82);
+		hour	= rtc_read (0x84);
+		mday	= rtc_read (0x86);
+		mon	= rtc_read (0x88);
+		wday	= rtc_read (0x8a);
+		year	= rtc_read (0x8c);
+		cent	= rtc_read (0x92);
+		/*
+		 * Check for seconds rollover
+		 */
+		if ((sec != 59) || (rtc_read(0x80) == sec)){
+			retry = 0;
+		}
+	} while (retry);
+
+	debug ( "Get RTC year: %02x mon: %02x cent: %02x mday: %02x wday: %02x "
+		"hr: %02x min: %02x sec: %02x\n",
+		year, mon, cent, mday, wday,
+		hour, min, sec );
+
+	tmp->tm_sec  = bcd2bin (sec  & 0x7F);
+	tmp->tm_min  = bcd2bin (min  & 0x7F);
+	tmp->tm_hour = bcd2bin (hour & 0x3F);
+	tmp->tm_mday = bcd2bin (mday & 0x3F);
+	tmp->tm_mon  = bcd2bin (mon & 0x1F);
+	tmp->tm_year = bcd2bin (year) + bcd2bin(cent) * 100;
+	tmp->tm_wday = bcd2bin (wday & 0x07);
+	tmp->tm_yday = 0;
+	tmp->tm_isdst= 0;
+
+	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);
+}
+
+void rtc_set (struct rtc_time *tmp)
+{
+
+	debug ( "Set 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);
+
+	rtc_write (0x9E, 0x00);
+	rtc_write (0x80, 0);	/* Clear seconds to ensure no rollover */
+	rtc_write (0x92, bin2bcd(tmp->tm_year / 100));
+	rtc_write (0x8c, bin2bcd(tmp->tm_year % 100));
+	rtc_write (0x8a, bin2bcd(tmp->tm_wday));
+	rtc_write (0x88, bin2bcd(tmp->tm_mon));
+	rtc_write (0x86, bin2bcd(tmp->tm_mday));
+	rtc_write (0x84, bin2bcd(tmp->tm_hour));
+	rtc_write (0x82, bin2bcd(tmp->tm_min ));
+	rtc_write (0x80, bin2bcd(tmp->tm_sec ));
+}
+
+void rtc_reset (void)
+{
+}
+
+#endif	/* CONFIG_RTC_MAX6900 && CFG_CMD_DATE */