[PATCH v5 2/2] serial: mxc: have putc use the TXFIFO

[Pali Rohár]

On Wednesday 26 October 2022 22:22:28 SCHNEIDER Johannes wrote:
> a colleague pointed out the use of barriers in the quoted kernel code snippet -> are we perhaps running into code-reordering issues; that checking the status flags and writing into the queue gets out of sync?

I was always in impression that readl() and writel() calls in U-Boot
cannot be reordered and so no explicit barrier is needed.

Could somebody check & confirm this?