dm: ns16550: Add support for reg-offset property

reg-offset is the part of standard 8250 binding in the kernel.
It is shifting start of address space by reg-offset.
On Xilinx platform this offset is typically 0x1000.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Moved the new field to the end of the struct to avoid problems:
Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/ns16550.h b/include/ns16550.h
index 4e620676c4..1311f4cb91 100644
--- a/include/ns16550.h
+++ b/include/ns16550.h
@@ -56,6 +56,7 @@ struct ns16550_platdata {
 	unsigned long base;
 	int reg_shift;
 	int clock;
+	int reg_offset;
 };
 
 struct udevice;