arm, am33xx: update for siemens am335x based boards

updates for the siemens am335x based boards:

- draco: add delay for DDR3 configuration
- change MTD partition layout and add a possibility
  to redefine MTD layout in board header.
- move ubi support to common header file
- draco: improve dtb naming
- draco: set CONFIG_SYS_CBSIZE to 1024
- add generic env based led
  Leds can now be defined in Environment
- add generic env based dfu button
  Which gpio is used for the dfu button can be defined
  through the Environment
- set MACH_TYPE only if defined
- draco: increase CPU freq to 300MHz
- Add time command to siemens am33xx boards
- DDR3: increase default tRFC
- draco: enable pullup for DFU and ERST pin
- change print format DDR3

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Acked-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/include/configs/dxr2.h b/include/configs/dxr2.h
index 76e6cac..fa74070 100644
--- a/include/configs/dxr2.h
+++ b/include/configs/dxr2.h
@@ -19,7 +19,8 @@
 
 #include "siemens-am33x-common.h"
 
-#define CONFIG_SYS_MPUCLK	275
+#define CONFIG_DISPLAY_CPUINFO
+#define CONFIG_SYS_MPUCLK	300
 #define DDR_PLL_FREQ	303
 #undef CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC
 
@@ -28,9 +29,15 @@
 #define BOARD_STATUS_LED	103	/* green LED */
 #define GPIO_LAN9303_NRST	88	/* GPIO2_24 = gpio88 */
 
+#define CONFIG_ENV_SETTINGS_BUTTONS_AND_LEDS \
+	"button_dfu0=27\0" \
+	"led0=103,1,0\0" \
+	"led1=64,0,1\0"
+
 #undef CONFIG_DOS_PARTITION
 #undef CONFIG_CMD_FAT
 
+#define CONFIG_BOARD_LATE_INIT
 
  /* Physical Memory Map */
 #define CONFIG_MAX_RAM_BANK_SIZE	(1024 << 20)	/* 1GB */
@@ -57,6 +64,14 @@
 /* Watchdog */
 #define CONFIG_OMAP_WATCHDOG
 
+/* Define own nand partitions */
+#define CONFIG_ENV_OFFSET_REDUND	0x2E0000
+#define CONFIG_ENV_SIZE_REDUND		0x2000
+#define CONFIG_ENV_RANGE		(4 * CONFIG_SYS_ENV_SECT_SIZE)
+
+
+#define MTDPARTS_DEFAULT	MTDPARTS_DEFAULT_V2
+
 #ifndef CONFIG_SPL_BUILD
 
 /* Default env settings */
@@ -64,7 +79,10 @@
 	"hostname=dxr2\0" \
 	"nand_img_size=0x400000\0" \
 	"optargs=\0" \
-	CONFIG_COMMON_ENV_SETTINGS
+	"preboot=draco_led 0\0" \
+	CONFIG_ENV_SETTINGS_BUTTONS_AND_LEDS \
+	CONFIG_ENV_SETTINGS_V2 \
+	CONFIG_ENV_SETTINGS_NAND_V2
 
 #ifndef CONFIG_RESTORE_FLASH
 /* set to negative value for no autoboot */
@@ -76,6 +94,7 @@
 	"reset; " \
 "fi;" \
 "run nand_boot;" \
+"run nand_boot_backup;" \
 "reset;"