ARC: [arcfpga] Early ARC UART to be only activated by cmdline

Earlier CONFIG_SERIAL_ARC_CONSOLE would unconditionally enable the
legacy ARC UART based early console even if platform lacked that UART
(e.g. nSIM OSCI platform).

So a multi-platform image containing the 2 UART drivers won't work.

Fix that by probing the driver only if "earlyprintk=ttyARC0" is present
in cmdline.

Reported-by: Chuck Jordan <cjordan@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arc/boot/dts/angel4.dts b/arch/arc/boot/dts/angel4.dts
index bcf662d21a57..5bb2fdaca02f 100644
--- a/arch/arc/boot/dts/angel4.dts
+++ b/arch/arc/boot/dts/angel4.dts
@@ -17,7 +17,7 @@
         interrupt-parent = <&intc>;
 
         chosen {
-                bootargs = "console=ttyARC0,115200n8";
+                bootargs = "console=ttyARC0,115200n8 earlyprintk=ttyARC0";
         };
 
         aliases {