powerpc/mpc5200: Make PSC UART driver update serial errors counters

This patch adds the capability to the mpc52xx-uart to report framing
errors, parity errors, breaks and overruns to userspace. These values
may be requested in userspace by using the ioctl TIOCGICOUNT.

Signed-off-by: René Bürgel <r.buergel@unicontrol.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 28c00c3d58f5..d82650d54391 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -752,10 +752,15 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
                         if (status & MPC52xx_PSC_SR_RB) {
                                 flag = TTY_BREAK;
                                 uart_handle_break(port);
-                        } else if (status & MPC52xx_PSC_SR_PE)
+                                port->icount.brk++;
+                        } else if (status & MPC52xx_PSC_SR_PE) {
                                 flag = TTY_PARITY;
-                        else if (status & MPC52xx_PSC_SR_FE)
+                                port->icount.parity++;
+                        }
+                        else if (status & MPC52xx_PSC_SR_FE) {
                                 flag = TTY_FRAME;
+                                port->icount.frame++;
+                        }
 
                         /* Clear error condition */
                         out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT);
@@ -769,6 +774,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
                          * affect the current character
                          */
                         tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+                        port->icount.overrun++;
                 }
         }