[coreboot-gerrit] Change in coreboot[master]: drivers/uart Add write support

[Marcello Sylvester Bauer (Code Review)]

Marcello Sylvester Bauer has uploaded this change for review. ( https://review.coreboot.org/25623

Change subject: drivers/uart Add write support
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drivers/uart Add write support

Add write support for uart (pl011).

Change-Id: I5a33b3cd4b333fb244bc55747014a301021e25e0
Signed-off-by: Marcello Sylvester Bauer 
---
M src/drivers/uart/pl011.c
1 file changed, 5 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/25623/1

diff --git a/src/drivers/uart/pl011.c b/src/drivers/uart/pl011.c
index 415dce1..6ec7a82 100644
--- a/src/drivers/uart/pl011.c
+++ b/src/drivers/uart/pl011.c
@@ -42,7 +42,11 @@

unsigned char uart_rx_byte(int idx)
 {
-	return 0;
+	struct pl011_uart *regs = uart_platform_baseptr(idx);
+
+	while ((read32(&regs->fr) & PL011_UARTFR_RXFE))
+		;
+	return read8(&regs->dr);
 }

#ifndef __PRE_RAM__