ARM: zynq: Allow UART1 to be used as DEBUG_LL console.

The main UART on the Xilinx ZC702 board is UART1, located at address
e0001000.  Add a Kconfig option to select this device as the low-level
debugging port.  This allows the really early boot printouts to reach
the USB serial adaptor on this board.

For consistency's sake, add a choice entry for UART0 even though it is
the the default if UART1 is not selected.

Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Tested-by: Josh Cartwright <josh.cartwright@ni.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index b0f3857b3a4..7754d51f2b1 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -132,6 +132,23 @@ choice
                   their output to UART1 serial port on DaVinci TNETV107X
                   devices.
 
+        config DEBUG_ZYNQ_UART0
+                bool "Kernel low-level debugging on Xilinx Zynq using UART0"
+                depends on ARCH_ZYNQ
+                help
+                  Say Y here if you want the debug print routines to direct
+                  their output to UART0 on the Zynq platform.
+
+        config DEBUG_ZYNQ_UART1
+                bool "Kernel low-level debugging on Xilinx Zynq using UART1"
+                depends on ARCH_ZYNQ
+                help
+                  Say Y here if you want the debug print routines to direct
+                  their output to UART1 on the Zynq platform.
+
+                  If you have a ZC702 board and want early boot messages to
+                  appear on the USB serial adaptor, select this option.
+
         config DEBUG_DC21285_PORT
                 bool "Kernel low-level debugging messages via footbridge serial port"
                 depends on FOOTBRIDGE