[U-Boot] question: ns16550 clock

Hello, I am using multiple serials (all UART'S) , and I am confused as to the meaning of the ns16550 clock. By default it is defined :

#define CONFIG_SYS_NS16550_CLK clk_get(DAVINCI_UART2_CLKID)

But if ns16550 driver is the same for all UART'S, it seems wrong to define it to depend on UART2 clock only (UART2 is the console) . Should I change this definition ?

Regards,

Ran