arm: ls102xa: Add LPUART support for LS1021ATWR board

This patch adds LPUART support for LS1021ATWR board.
For ls1021atwr_nor_lpuart_defconfig, LPUART is used as the console.

Signed-off-by: Alison Wang <alison.wang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

board/freescale/ls1021atwr/MAINTAINERS

@@ -5,5 +5,6 @@ F:	board/freescale/ls1021atwr/
 F:	include/configs/ls1021atwr.h
 F:	configs/ls1021atwr_nor_defconfig
 F:	configs/ls1021atwr_nor_SECURE_BOOT_defconfig
+F:	configs/ls1021atwr_nor_lpuart_defconfig
 F:	configs/ls1021atwr_sdcard_defconfig
 F:	configs/ls1021atwr_qspi_defconfig

configs/ls1021atwr_nor_lpuart_defconfig

@@ -0,0 +1,3 @@
+CONFIG_SYS_EXTRA_OPTIONS="LPUART"
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_LS1021ATWR=y

include/configs/ls1021atwr.h

@@ -186,11 +186,16 @@
 /*
  * Serial Port
  */
+#ifdef CONFIG_LPUART
+#define CONFIG_FSL_LPUART
+#define CONFIG_LPUART_32B_REG
+#else
 #define CONFIG_CONS_INDEX		1
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
 #define CONFIG_SYS_NS16550_CLK		get_serial_clock()
+#endif
 
 #define CONFIG_BAUDRATE			115200
 
@@ -325,10 +330,17 @@
 
 #define CONFIG_BOOTDELAY		3
 
+#ifdef CONFIG_LPUART
+#define CONFIG_EXTRA_ENV_SETTINGS       \
+	"bootargs=root=/dev/ram0 rw console=ttyLP0,115200\0" \
+	"initrd_high=0xcfffffff\0"      \
+	"fdt_high=0xcfffffff\0"
+#else
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 	"bootargs=root=/dev/ram0 rw console=ttyS0,115200\0" \
 	"initrd_high=0xcfffffff\0"      \
 	"fdt_high=0xcfffffff\0"
+#endif
 
 /*
  * Miscellaneous configurable options