[PATCH] ppc32 CPM_UART: Fixed break send on SCC

SCC uart sends a break sequence each time it is stopped with the
CPM_CR_STOP_TX command. That means that each time an application closes the
serial device, a break is transmitted. To fix this, graceful tx stop is
issued for SCC.

Signed-off-by: David Jander <david.jander@protonic.nl>
Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index ced193bf9e1e..b9d1185df20c 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -457,7 +457,11 @@ static void cpm_uart_shutdown(struct uart_port *port)
                 }
 
                 /* Shut them really down and reinit buffer descriptors */
-                cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+                if (IS_SMC(pinfo))
+                        cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+                else
+                        cpm_line_cr_cmd(line, CPM_CR_GRA_STOP_TX);
+
                 cpm_uart_initbd(pinfo);
         }
 }