doc: board: ti: Move documentation from README to .rst

Make the conversion for all existing TI documentation from README to
.rst

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
diff --git a/doc/board/ti/am43xx_evm.rst b/doc/board/ti/am43xx_evm.rst
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+.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+.. sectionauthor:: Neha Malcom Francis <n-francis@ti.com>
+
+AM43xx Generation
+=================
+
+Secure Boot
+-----------
+
+.. include:: am335x_evm.rst
+   :start-after: .. secure_boot_include_start_config_ti_secure_device
+   :end-before: .. secure_boot_include_end_config_ti_secure_device
+
+.. include:: am335x_evm.rst
+   :start-after: .. secure_boot_include_start_spl_boot
+   :end-before: .. secure_boot_include_end_spl_boot
+
+<IMAGE_FLAG> is a value that specifies the type of the image to
+generate OR the action the image generation tool will take. Valid
+values are:
+
+.. list-table::
+   :widths: 25 25
+   :header-rows: 0
+
+   * - SPI_X-LOADER
+     - Generates an image for SPI flash (byte swapped)
+   * - XIP_X-LOADER
+     - Generates a single stage u-boot for NOR/QSPI XiP
+   * - ISSW
+     - Generates an image for all other boot modes
+
+<INPUT_FILE> is the full path and filename of the public world boot
+loaderbinary file (depending on the boot media, this is usually
+either u-boot-spl.bin or u-boot.bin).
+
+<OUTPUT_FILE> is the full path and filename of the final secure
+image. The output binary images should be used in place of the standard
+non-secure binary images (see the platform-specific user's guides and
+releases notes for how the non-secure images are typically used)
+
+.. list-table::
+   :widths: 25 25
+   :header-rows: 0
+
+   * - u-boot-spl_HS_SPI_X-LOADER
+     - byte swapped boot image for SPI flash
+   * - u-boot_HS_XIP_X-LOADER
+     - boot image for NOR or QSPI Xip flash
+   * - u-boot-spl_HS_ISSW
+     - boot image for all other boot media
+
+
+<SPL_LOAD_ADDR> is the address at which SOC ROM should load the
+<INPUT_FILE>
+
+.. include:: am335x_evm.rst
+   :start-after: .. secure_boot_include_start_primary_u_boot
+   :end-before: .. secure_boot_include_end_primary_u_boot
+
+.. qspi_boot_support_include_start
+
+QSPI U-Boot support
+-------------------
+
+Host processor is connected to serial flash device via qpsi
+interface. QSPI is a kind of spi module that allows single,
+dual and quad read access to external spi devices. The module
+has a memory mapped interface which provide direct interface
+for accessing data form external spi devices.
+
+The one QSPI in the device is primarily intended for fast booting
+from Quad SPI flash devices.
+
+Usecase
+^^^^^^^
+
+MLO/u-boot.img will be flashed from SD/MMC to the flash device
+using serial flash erase and write commands. Then, switch settings
+will be changed to qspi boot. Then, the ROM code will read MLO
+from the predefined location in the flash, where it was flashed and
+execute it after storing it in SDRAM. Then, the MLO will read
+u-boot.img from flash and execute it from SDRAM.
+
+SPI mode
+^^^^^^^^
+
+SPI mode uses mtd spi framework for transfer and reception of data.
+Can be used in:
+
+ #. Normal mode: use single pin for transfers
+ #. Dual Mode: use two pins for transfers.
+ #. Quad mode: use four pin for transfer
+
+Memory mapped read mode
+^^^^^^^^^^^^^^^^^^^^^^^
+
+In this, SPI controller is configured using configuration port and then
+controller is switched to memory mapped port for data read.
+
+Driver
+^^^^^^
+
+drivers/qspi/ti_qspi.c
+    - File which is responsible for configuring the
+      qspi controller and also for providing the low level api which
+      is responsible for transferring the datas from host controller
+      to flash device and vice versa.
+
+.. qspi_boot_support_include_end
+
+Testing
+^^^^^^^
+
+These are the testing details of qspi flash driver with Macronix M25L51235
+flash device.
+
+The test includes
+ - probing the flash device
+ - erasing the flash device
+ - Writing to flash
+ - Reading the contents of the flash.
+
+Test Log
+
+.. code-block:: bash
+
+  Hit any key to stop autoboot:  0
+  => sf probe 0
+  SF: Detected MX25L51235F with page size 256 Bytes, erase size 64 KiB, total 64 MiB, mapped at 30000000
+  => sf erase 0 0x80000
+  SF: 524288 bytes @ 0x0 Erased: OK
+  => mw 81000000 0xdededede 0x40000
+  => sf write 81000000 0 0x40000
+  SF: 262144 bytes @ 0x0 Written: OK
+  => sf read 82000000 0 0x40000
+  SF: 262144 bytes @ 0x0 Read: OK
+  => md 0x82000000
+  82000000: dededede dededede dededede dededede    ................
+  82000010: dededede dededede dededede dededede    ................
+  82000020: dededede dededede dededede dededede    ................
+  82000030: dededede dededede dededede dededede    ................
+  82000040: dededede dededede dededede dededede    ................
+  82000050: dededede dededede dededede dededede    ................
+  82000060: dededede dededede dededede dededede    ................
+  82000070: dededede dededede dededede dededede    ................
+  82000080: dededede dededede dededede dededede    ................
+  82000090: dededede dededede dededede dededede    ................
+  820000a0: dededede dededede dededede dededede    ................
+  820000b0: dededede dededede dededede dededede    ................
+  820000c0: dededede dededede dededede dededede    ................
+  820000d0: dededede dededede dededede dededede    ................
+  820000e0: dededede dededede dededede dededede    ................
+  820000f0: dededede dededede dededede dededede    ................
+  => md 0x82010000
+  82010000: dededede dededede dededede dededede    ................
+  82010010: dededede dededede dededede dededede    ................
+  82010020: dededede dededede dededede dededede    ................
+  82010030: dededede dededede dededede dededede    ................
+  82010040: dededede dededede dededede dededede    ................
+  82010050: dededede dededede dededede dededede    ................
+  82010060: dededede dededede dededede dededede    ................
+  82010070: dededede dededede dededede dededede    ................
+  82010080: dededede dededede dededede dededede    ................
+  82010090: dededede dededede dededede dededede    ................
+  820100a0: dededede dededede dededede dededede    ................
+  820100b0: dededede dededede dededede dededede    ................
+  820100c0: dededede dededede dededede dededede    ................
+  820100d0: dededede dededede dededede dededede    ................
+  820100e0: dededede dededede dededede dededede    ................
+  820100f0: dededede dededede dededede dededede    ................
+  => md 0x82030000
+  82030000: dededede dededede dededede dededede    ................
+  82030010: dededede dededede dededede dededede    ................
+  82030020: dededede dededede dededede dededede    ................
+  82030030: dededede dededede dededede dededede    ................
+  82030040: dededede dededede dededede dededede    ................
+  82030050: dededede dededede dededede dededede    ................
+  82030060: dededede dededede dededede dededede    ................
+  82030070: dededede dededede dededede dededede    ................
+  82030080: dededede dededede dededede dededede    ................
+  82030090: dededede dededede dededede dededede    ................
+  820300a0: dededede dededede dededede dededede    ................
+  820300b0: dededede dededede dededede dededede    ................
+  820300c0: dededede dededede dededede dededede    ................
+  820300d0: dededede dededede dededede dededede    ................
+  820300e0: dededede dededede dededede dededede    ................
+  820300f0: dededede dededede dededede dededede    ................