[U-Boot] Setup NS16550 specific parameters from platform code

[Hebbar, Gururaja]

Hi,

For our upcoming SOC, we have a situation where in we need to configure UART console at runtime. Our SOC makes use of NS16550.

I looked through the u-boot tree & found several references for doing the same. 

hebbar at linux- server:~/projects/u-boot-git$ gr NS16550_init *
board/sheldon/simpc8313/simpc8313.c:145:        NS16550_init((NS16550_t)(CONFIG_SYS_IMMR + 0x4500),
board/ml2/serial.c:45:  (void) NS16550_init (COM_PORTS[0], clock_divisor);
board/ml2/serial.c:48:  (void) NS16550_init (COM_PORTS[1], clock_divisor);
board/MAI/AmigaOneG3SE/serial.c:157:    NS16550_init (Com0, clock_divisor);
board/MAI/AmigaOneG3SE/serial.c:244:    NS16550_init (Com0, clock_divisor);
board/freescale/mpc8313erdb/mpc8313erdb.c:138:  NS16550_init((NS16550_t)(CONFIG_SYS_IMMR + 0x4500),
board/freescale/mpc8315erdb/mpc8315erdb.c:239:  NS16550_init((NS16550_t)(CONFIG_SYS_IMMR + 0x4500),
board/bmw/serial.c:45:  NS16550_init (CONFIG_CONS_INDEX - 1, clock_divisor);
board/bmw/ns16550.c:16:volatile struct NS16550 *NS16550_init (int chan, int baud_divisor)
board/mvblue/mvblue.c:45:       NS16550_init (console, clock_divisor);
board/Marvell/common/serial.c:101:      (void) NS16550_init (0, clock_divisor);
board/Marvell/common/serial.c:104:      (void) NS16550_init (1, clock_divisor);
board/Marvell/common/ns16550.c:20:volatile struct NS16550 *NS16550_init (int chan, int baud_divisor)
board/Marvell/common/ns16550.h:92:volatile struct NS16550 * NS16550_init(int chan, int baud_divisor);
board/amirix/ap1000/serial.c:43:        (void) NS16550_init (COM_PORTS[0], clock_divisor);
board/evb64260/serial.c:103:    (void)NS16550_init(COM_PORTS[0], clock_divisor);
board/evb64260/serial.c:106:    (void)NS16550_init(COM_PORTS[1], clock_divisor);


I would like to know whether this approach is correct and whether this approach is still allowed in current u-boot.

If not, what is the correct approach? I am also looking at CONFIG_SERIAL_MULTI. 

Thanks in advance.

Regards
Gururaja