[U-Boot] [PATCH v2 3/4] tegra: Implement pre-console putc() for fdt warning

[Wolfgang Denk]

Dear Simon Glass,

In message <1331325178-14634-3-git-send-email-sjg at chromium.org> you wrote:
> When there is not device tree file available to U-Boot, we panic.
> Implement board_pre_console_putc() so that this panic will be displayed
> on the serial console.
...

> +void board_pre_console_putc(int ch)
> +{
...
> +	for (uart_addr = uart_reg_addr; *uart_addr; uart_addr++) {
> +		NS16550_t regs = (NS16550_t)*uart_addr;
> +
> +		NS16550_init(regs, divisor);
> +		NS16550_putc(regs, ch);
> +		if (ch == '\n')
> +			NS16550_putc(regs, '\r');
> +		NS16550_drain(regs);

Why is this needed for every output character?

Actually, why is it needed at all?

Best regards,

Wolfgang Denk

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