[SERIAL] kernel console should send CRLF not LFCR

Glen Turner reported that writing LFCR rather than the more
traditional CRLF causes issues with some terminals.

Since this aflicts many serial drivers, extract the common code
to a library function (uart_console_write) and arrange for each
driver to supply a "putchar" function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 9 deletions

diff --git a/drivers/serial/vr41xx_siu.c b/drivers/serial/vr41xx_siu.c
index d61494d185cd..3f88b8e81937 100644
--- a/drivers/serial/vr41xx_siu.c
+++ b/drivers/serial/vr41xx_siu.c
@@ -821,25 +821,23 @@ static void wait_for_xmitr(struct uart_port *port)
 	}
 }
 
+static void siu_console_putchar(struct uart_port *port, int ch)
+{
+	wait_for_xmitr(port);
+	siu_write(port, UART_TX, ch);
+}
+
 static void siu_console_write(struct console *con, const char *s, unsigned count)
 {
 	struct uart_port *port;
 	uint8_t ier;
-	unsigned i;
 
 	port = &siu_uart_ports[con->index];
 
 	ier = siu_read(port, UART_IER);
 	siu_write(port, UART_IER, 0);
 
-	for (i = 0; i < count && *s != '\0'; i++, s++) {
-		wait_for_xmitr(port);
-		siu_write(port, UART_TX, *s);
-		if (*s == '\n') {
-			wait_for_xmitr(port);
-			siu_write(port, UART_TX, '\r');
-		}
-	}
+	uart_console_write(port, s, count, siu_console_putchar);
 
 	wait_for_xmitr(port);
 	siu_write(port, UART_IER, ier);