[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, 9 insertions, 17 deletions

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 4d53fb5ca87b..c3b7a6673e9c 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -743,6 +743,13 @@ static void __init imx_init_ports(void)
 }
 
 #ifdef CONFIG_SERIAL_IMX_CONSOLE
+static void imx_console_putchar(struct uart_port *port, int ch)
+{
+        struct imx_port *sport = (struct imx_port *)port;
+        while ((UTS((u32)sport->port.membase) & UTS_TXFULL))
+                barrier();
+        URTX0((u32)sport->port.membase) = ch;
+}
 
 /*
  * Interrupts are disabled on entering
@@ -751,7 +758,7 @@ static void
 imx_console_write(struct console *co, const char *s, unsigned int count)
 {
         struct imx_port *sport = &imx_ports[co->index];
-        unsigned int old_ucr1, old_ucr2, i;
+        unsigned int old_ucr1, old_ucr2;
 
         /*
          *      First, save UCR1/2 and then disable interrupts
@@ -764,22 +771,7 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
                            & ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN);
         UCR2((u32)sport->port.membase) = old_ucr2 | UCR2_TXEN;
 
-        /*
-         *      Now, do each character
-         */
-        for (i = 0; i < count; i++) {
-
-                while ((UTS((u32)sport->port.membase) & UTS_TXFULL))
-                        barrier();
-
-                URTX0((u32)sport->port.membase) = s[i];
-
-                if (s[i] == '\n') {
-                        while ((UTS((u32)sport->port.membase) & UTS_TXFULL))
-                                barrier();
-                        URTX0((u32)sport->port.membase) = '\r';
-                }
-        }
+        uart_console_write(&sport->port, s, count, imx_console_putchar);
 
         /*
          *      Finally, wait for transmitter to become empty