doc: board: Convert README.zynq to reST

Convert plain text documentation to reStructuredText format and add
it to Sphinx TOC tree. No essential content change.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/doc/README.zynq b/doc/README.zynq
deleted file mode 100644
index da977b2..0000000
--- a/doc/README.zynq
+++ /dev/null
@@ -1,83 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0+
-#
-# Xilinx ZYNQ U-Boot
-#
-# (C) Copyright 2013 Xilinx, Inc.
-
-1. About this
-
-This document describes the information about Xilinx Zynq U-Boot -
-like supported boards, ML status and TODO list.
-
-2. Zynq boards
-
-Xilinx Zynq-7000 All Programmable SoCs enable extensive system level
-differentiation, integration, and flexibility through hardware, software,
-and I/O programmability.
-
-* zc702 (single qspi, gem0, mmc) [1]
-* zc706 (dual parallel qspi, gem0, mmc) [2]
-* zed (single qspi, gem0, mmc) [3]
-* microzed (single qspi, gem0, mmc) [4]
-* zc770
-  - zc770-xm010 (single qspi, gem0, mmc)
-  - zc770-xm011 (8 or 16 bit nand)
-  - zc770-xm012 (nor)
-  - zc770-xm013 (dual parallel qspi, gem1)
-
-3. Building
-
- ex. configure and build for zc702 board
-   $ make zynq_zc702_config
-   $ make
-
-4. Bootmode
-
-Zynq has a facility to read the bootmode from the slcr bootmode register
-once user is setting through jumpers on the board - see page no:1546 on [5]
-
-All possible bootmode values are defined in Table 6-2:Boot_Mode MIO Pins
-on [5].
-
-board_late_init() will read the bootmode values using slcr bootmode register
-at runtime and assign the modeboot variable to specific bootmode string which
-is intern used in autoboot.
-
-SLCR bootmode register Bit[3:0] values
-#define ZYNQ_BM_NOR		0x02
-#define ZYNQ_BM_SD		0x05
-#define ZYNQ_BM_JTAG		0x0
-
-"modeboot" variable can assign any of "norboot", "sdboot" or "jtagboot"
-bootmode strings at runtime.
-
-5. Mainline status
-
-- Added basic board configurations support.
-- Added zynq u-boot bsp code - arch/arm/cpu/armv7/zynq
-- Added zynq boards named - zc70x, zed, microzed, zc770_xm010/xm011/xm012/xm013
-- Added zynq drivers:
-  serial - drivers/serial/serial_zynq.c
-  net - drivers/net/zynq_gem.c
-  mmc - drivers/mmc/zynq_sdhci.c
-  spi - drivers/spi/zynq_spi.c
-  qspi - drivers/spi/zynq_qspi.c
-  i2c - drivers/i2c/zynq_i2c.c
-  nand - drivers/mtd/nand/raw/zynq_nand.c
-- Done proper cleanups on board configurations
-- Added basic FDT support for zynq boards
-- d-cache support for zynq_gem.c
-
-6. TODO
-
-- Add FDT support on individual drivers
-
-[1] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC702-G.htm
-[2] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm
-[3] http://zedboard.org/product/zedboard
-[4] http://zedboard.org/product/microzed
-[5] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf
-
---
-Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
-Sun Dec 15 14:52:41 IST 2013
diff --git a/doc/board/index.rst b/doc/board/index.rst
index a7e94cf..00e72f5 100644
--- a/doc/board/index.rst
+++ b/doc/board/index.rst
@@ -15,3 +15,4 @@
    intel/index
    renesas/index
    sifive/index
+   xilinx/index
diff --git a/doc/board/xilinx/zynq.rst b/doc/board/xilinx/zynq.rst
new file mode 100644
index 0000000..3f0513e
--- /dev/null
+++ b/doc/board/xilinx/zynq.rst
@@ -0,0 +1,95 @@
+.. SPDX-License-Identifier: GPL-2.0+
+..  (C) Copyright 2013 Xilinx, Inc.
+
+ZYNQ
+====
+
+About this
+----------
+
+This document describes the information about Xilinx Zynq U-Boot -
+like supported boards, ML status and TODO list.
+
+Zynq boards
+-----------
+
+Xilinx Zynq-7000 All Programmable SoCs enable extensive system level
+differentiation, integration, and flexibility through hardware, software,
+and I/O programmability.
+
+* zc702 (single qspi, gem0, mmc) [1]
+* zc706 (dual parallel qspi, gem0, mmc) [2]
+* zed (single qspi, gem0, mmc) [3]
+* microzed (single qspi, gem0, mmc) [4]
+* zc770
+     - zc770-xm010 (single qspi, gem0, mmc)
+     - zc770-xm011 (8 or 16 bit nand)
+     - zc770-xm012 (nor)
+     - zc770-xm013 (dual parallel qspi, gem1)
+
+Building
+--------
+
+configure and build for zc702 board::
+
+   $ make zynq_zc702_config
+   $ make
+
+Bootmode
+--------
+
+Zynq has a facility to read the bootmode from the slcr bootmode register
+once user is setting through jumpers on the board - see page no:1546 on [5]
+
+All possible bootmode values are defined in Table 6-2:Boot_Mode MIO Pins
+on [5].
+
+board_late_init() will read the bootmode values using slcr bootmode register
+at runtime and assign the modeboot variable to specific bootmode string which
+is intern used in autoboot.
+
+SLCR bootmode register Bit[3:0] values
+
+.. code-block:: c
+
+   #define ZYNQ_BM_NOR		0x02
+   #define ZYNQ_BM_SD		0x05
+   #define ZYNQ_BM_JTAG		0x0
+
+"modeboot" variable can assign any of "norboot", "sdboot" or "jtagboot"
+bootmode strings at runtime.
+
+Mainline status
+---------------
+
+- Added basic board configurations support.
+- Added zynq u-boot bsp code - arch/arm/cpu/armv7/zynq
+- Added zynq boards named - zc70x, zed, microzed, zc770_xm010/xm011/xm012/xm013
+- Added zynq drivers:
+
+  :serial: drivers/serial/serial_zynq.c
+  :net: drivers/net/zynq_gem.c
+  :mmc: drivers/mmc/zynq_sdhci.c
+  :spi: drivers/spi/zynq_spi.c
+  :qspi: drivers/spi/zynq_qspi.c
+  :i2c: drivers/i2c/zynq_i2c.c
+  :nand: drivers/mtd/nand/raw/zynq_nand.c
+
+- Done proper cleanups on board configurations
+- Added basic FDT support for zynq boards
+- d-cache support for zynq_gem.c
+
+TODO
+----
+
+Add FDT support on individual drivers
+
+* [1] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC702-G.htm
+* [2] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm
+* [3] http://zedboard.org/product/zedboard
+* [4] http://zedboard.org/product/microzed
+* [5] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf
+
+
+.. Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
+.. Sun Dec 15 14:52:41 IST 2013