am335x_evm: Enable use of UART{1,2,3,4,5}

Add targets of am335x_evm_uart{1,2,3,4,5} to have serial input/output on
UART{1,2,3,4,5} for use with the Beaglebone RS232 cape, am335x_evm
daughterboard, and other custom configurations.

Modify target for am335x_evm to include SERIAL1 and CONS_INDEX=1
options in order to clarify UART selection requirements.

Signed-off-by: Andrew Bradford <andrew@bradfordembedded.com>

boards.cfg

@@ -225,7 +225,12 @@ versatileqemu                arm         arm926ejs   versatile           armltd
 integratorap_cm946es         arm         arm946es    integrator          armltd         -               integratorap:CM946ES
 integratorcp_cm946es         arm         arm946es    integrator          armltd         -               integratorcp:CM946ES
 ca9x4_ct_vxp                 arm         armv7       vexpress            armltd
-am335x_evm                   arm         armv7       am335x              ti             am33xx
+am335x_evm                   arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1
+am335x_evm_uart1             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL2,CONS_INDEX=2
+am335x_evm_uart2             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL3,CONS_INDEX=3
+am335x_evm_uart3             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL4,CONS_INDEX=4
+am335x_evm_uart4             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL5,CONS_INDEX=5
+am335x_evm_uart5             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL6,CONS_INDEX=6
 highbank                     arm         armv7       highbank            -              highbank
 mx51_efikamx                 arm         armv7       mx51_efikamx        genesi         mx5		mx51_efikamx:MACH_TYPE=MACH_TYPE_MX51_EFIKAMX,IMX_CONFIG=board/genesi/mx51_efikamx/imximage_mx.cfg
 mx51_efikasb                 arm         armv7       mx51_efikamx        genesi         mx5		mx51_efikamx:MACH_TYPE=MACH_TYPE_MX51_EFIKASB,IMX_CONFIG=board/genesi/mx51_efikamx/imximage_sb.cfg

include/configs/am335x_evm.h

@@ -158,9 +158,15 @@
 /* NS16550 Configuration */
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SERIAL_MULTI
 #define CONFIG_SYS_NS16550_REG_SIZE	(-4)
 #define CONFIG_SYS_NS16550_CLK		(48000000)
 #define CONFIG_SYS_NS16550_COM1		0x44e09000	/* Base EVM has UART0 */
+#define CONFIG_SYS_NS16550_COM2		0x48022000	/* UART1 */
+#define CONFIG_SYS_NS16550_COM3		0x48024000	/* UART2 */
+#define CONFIG_SYS_NS16550_COM4		0x481a6000	/* UART3 */
+#define CONFIG_SYS_NS16550_COM5		0x481a8000	/* UART4 */
+#define CONFIG_SYS_NS16550_COM6		0x481aa000	/* UART5 */
 
 /* I2C Configuration */
 #define CONFIG_I2C
@@ -182,11 +188,7 @@
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 110, 300, 600, 1200, 2400, \
 4800, 9600, 14400, 19200, 28800, 38400, 56000, 57600, 115200 }
 
-/*
- * select serial console configuration
- */
-#define CONFIG_SERIAL1			1
-#define CONFIG_CONS_INDEX		1
+#define CONFIG_ENV_OVERWRITE		1
 #define CONFIG_SYS_CONSOLE_INFO_QUIET
 
 #define CONFIG_ENV_IS_NOWHERE