tty: Blackin CTS/RTS
Both software emulated and hardware based CTS and RTS are enabled in
serial driver.
The CTS RTS PIN connection on BF548 UART port is defined as a modem
device not as a host device. In order to test it under Linux, please
nake a cross UART cable to exchange CTS and RTS signal.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index d89972b..f2e5736 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -734,7 +734,7 @@
config UART0_CTS_PIN
int "UART0 CTS pin"
- depends on BFIN_UART0_CTSRTS
+ depends on BFIN_UART0_CTSRTS && !BF548
default 23
help
The default pin is GPIO_GP7.
@@ -742,7 +742,7 @@
config UART0_RTS_PIN
int "UART0 RTS pin"
- depends on BFIN_UART0_CTSRTS
+ depends on BFIN_UART0_CTSRTS && !BF548
default 22
help
The default pin is GPIO_GP6.
@@ -763,14 +763,14 @@
config UART1_CTS_PIN
int "UART1 CTS pin"
- depends on BFIN_UART1_CTSRTS && !BF54x
+ depends on BFIN_UART1_CTSRTS && !BF548
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config UART1_RTS_PIN
int "UART1 RTS pin"
- depends on BFIN_UART1_CTSRTS && !BF54x
+ depends on BFIN_UART1_CTSRTS && !BF548
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
@@ -790,14 +790,14 @@
config UART2_CTS_PIN
int "UART2 CTS pin"
- depends on BFIN_UART2_CTSRTS
+ depends on BFIN_UART2_CTSRTS && !BF548
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config UART2_RTS_PIN
int "UART2 RTS pin"
- depends on BFIN_UART2_CTSRTS
+ depends on BFIN_UART2_CTSRTS && !BF548
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
@@ -815,6 +815,20 @@
Enable hardware flow control in the driver. Using GPIO emulate the CTS/RTS
signal.
+config UART3_CTS_PIN
+ int "UART3 CTS pin"
+ depends on BFIN_UART3_CTSRTS && !BF548
+ default -1
+ help
+ Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
+config UART3_RTS_PIN
+ int "UART3 RTS pin"
+ depends on BFIN_UART3_CTSRTS && !BF548
+ default -1
+ help
+ Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
config SERIAL_IMX
bool "IMX serial port support"
depends on ARM && (ARCH_IMX || ARCH_MXC)