serial: bfin_sport_uart: add support for CTS/RTS via GPIOs
Some people need flow control on their ports, so now boards can support
that via any GPIOs.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/serial/bfin_sport_uart.h b/drivers/serial/bfin_sport_uart.h
index 9791fcc..9ce253e 100644
--- a/drivers/serial/bfin_sport_uart.h
+++ b/drivers/serial/bfin_sport_uart.h
@@ -72,4 +72,15 @@
#define SPORT_TX_FIFO_SIZE 8
+#define SPORT_UART_GET_CTS(x) gpio_get_value(x->cts_pin)
+#define SPORT_UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)
+#define SPORT_UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)
+
+#if defined(CONFIG_SERIAL_BFIN_SPORT0_UART_CTSRTS) \
+ || defined(CONFIG_SERIAL_BFIN_SPORT1_UART_CTSRTS) \
+ || defined(CONFIG_SERIAL_BFIN_SPORT2_UART_CTSRTS) \
+ || defined(CONFIG_SERIAL_BFIN_SPORT3_UART_CTSRTS)
+# define CONFIG_SERIAL_BFIN_SPORT_CTSRTS
+#endif
+
#endif /* _BFIN_SPORT_UART_H */