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

[Fabio Estevam]

Hi Tim,

On 25/10/2022 18:37, Tim Harvey wrote:

> Fabio and Pali,
> 
> Seems reasonable but this does not resolve the problem. Whatever I
> print in board_init gets cutoff by the print from dm_announce.

Should we check for both TXFULL and TXEMPTY conditions?

--- a/drivers/serial/serial_mxc.c
+++ b/drivers/serial/serial_mxc.c
@@ -311,7 +311,7 @@ static int mxc_serial_putc(struct udevice *dev, 
const char ch)
         struct mxc_serial_plat *plat = dev_get_plat(dev);
         struct mxc_uart *const uart = plat->reg;

-       if (readl(&uart->ts) & UTS_TXFULL)
+       if ((readl(&uart->ts) & UTS_TXFULL) || !(readl(&uart->ts) & 
UTS_TXEMPTY))
                 return -EAGAIN;

         writel(ch, &uart->txd);