From: Fabio Estevam <festevam@denx.de>
Date: Tue, 8 Nov 2022 11:39:33 +0000 (-0300)
Subject: Revert "serial: mxc: have putc use the TXFIFO"
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=fc1c1760de38823edbdc2cdd9606dff938a07f6e;p=u-boot.git

Revert "serial: mxc: have putc use the TXFIFO"

This reverts commit c7878a0483c59c48a730123bc0f4659fd40921bf.

Since commit c7878a0483c5 ("serial: mxc: have putc use the TXFIFO"),
serial console corruption can be seen when priting inside board_init().

Revert it to avoid the regression.

Reported-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Tim Harvey <tharvey@gateworks.com>
---

diff --git a/drivers/serial/serial_mxc.c b/drivers/serial/serial_mxc.c
index 4cf79c1ca2..82c0d84628 100644
--- 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_TXEMPTY))
 		return -EAGAIN;
 
 	writel(ch, &uart->txd);