ARM: zynq: Add waituart implementation

Add missing waituart implementation.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/arm/include/debug/zynq.S b/arch/arm/include/debug/zynq.S
index f9aa9740a73f09676d5a963f47e2d8e4f7d83e6c..0b762fafa7586a092399f8864f1cfdeaf3ff05ce 100644 (file)
--- a/arch/arm/include/debug/zynq.S
+++ b/arch/arm/include/debug/zynq.S
@@ -42,6 +42,9 @@
                .endm
 
                .macro  waituart,rd,rx
+1001:          ldr     \rd, [\rx, #UART_SR_OFFSET]
+               tst     \rd, #UART_SR_TXEMPTY
+               beq     1001b
                .endm
 
                .macro  busyuart,rd,rx