Hi
I have hacked hardware flowcontrol into 8250.c for the XR17D154. I have
attached the patch. The fix just uses another address for the EFR-register.
I would like to have some adwise as to how to do this the right way.
Thanks.
--
Søren Holm
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index b3b881b..ba28eb8 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -301,7 +301,7 @@ static const struct serial8250_config uart_config[] = {
.fifo_size = 64,
.tx_loadsz = 64,
.fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
- .flags = UART_CAP_FIFO | UART_CAP_AFE,
+ .flags = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR,
},
};
@@ -2420,7 +2420,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
efr |= UART_EFR_CTS;
serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B);
- serial_outp(up, UART_EFR, efr);
+ serial_outp(up, UART_EFR2, efr);
}
#ifdef CONFIG_ARCH_OMAP
diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h
index 3ecb71a..56b2569 100644
--- a/include/linux/serial_reg.h
+++ b/include/linux/serial_reg.h
@@ -150,6 +150,7 @@
* LCR=0xBF (or DLAB=1 for 16C660)
*/
#define UART_EFR 2 /* I/O: Extended Features Register */
+#define UART_EFR2 9 /* I/O: Extended Features Register for Exari XR17D154 */
#define UART_EFR_CTS 0x80 /* CTS flow control */
#define UART_EFR_RTS 0x40 /* RTS flow control */
#define UART_EFR_SCD 0x20 /* Special character detect */
