[PATCH] booting-without-of: add Xilinx uart 16550.

[Pavel Kiryukhin <pkiryukhin@ru.mvista.com>]

Add uart 16550 properties description to Xilinx portion of booting-without-of.txt

Signed-off-by: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
---
 Documentation/powerpc/booting-without-of.txt |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index 7b4e8a7..dd77bbc 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -2575,10 +2575,22 @@ platforms are moved over to use the flattened-device-tree model.
 
       Xilinx uartlite devices are simple fixed speed serial ports.
 
-      Requred properties:
+      Required properties:
        - current-speed : Baud rate of uartlite
 
-      v) Xilinx hwicap
+      v) Xilinx Uart 16550
+
+      Xilinx uart 16550 device registers are compatible with all standard 16540 
+      and 16550 UARTs.
+
+      Required properties:
+       - current-speed : Baud rate of uart.
+       - clock-frequency : Baud rate generator reference clock. May be driven 
+         by OPB_Clk (100 MHz).
+       - reg-shift : registers offset shift (standard uart_port field). 
+         Property is optional if regshift is zero.
+
+      vi) Xilinx hwicap
 
 		Xilinx hwicap devices provide access to the configuration logic
 		of the FPGA through the Internal Configuration Access Port
-- 
1.5.4.1