How to add SPI slash N25Q128 support to the U-boot

Here we are following the way which the Calixto (Third party TI support) have used for their NAND flash (we are using their SOM):

The problem is they are using NAND flash on SOM,
We need both SPI flash as well as NAND flash for our application,
So we used their SOM and added SPI flash to our Carrier board(application specific). So they do not have proper support for SPI flash as of now and they are also working on this to help us boot from SPI flash.

We could able to boot from NAND flash using our custom board with their SOM using UART boot method which Calixto has asked us to folow.
But finding difficult to follow the same method to flash from SPI flash as we are using different flash part number [Numonyx:N25Q128] whose support is not added in the DULG Uboot source (As in this method it is completely dependent on Uboot source).

The following are the steps followed :

Converted U-boot[elf] to uboot_uart.bin using AISgen D800k008.exe with proper DDR, PLL0 and PLL1 setting for UART2 boot mode.

Transferred uboot_uart.bin to the Target using UART BOOT host.exe on [Boot mode:UART2].

ON succeeding opened the hyperterminal and issued command (with minimal uboot_uart.bin residing in target RAM)

> sf probe 0

Mistook SPI flash as M25p128(since numonyx support is not added in the Uboot source code).

>sf erase 0 10000

Erase failed.

later transfered the actual uboot for SPI flash via tftp

when we issue
>sf write 0xc0700000 0 10000

it is getting failed.

As we are following this method we are finding comfortable with this method of flashing.

Can you help us resolve this issue.

How to add SPI flash N25Q128 support to the Uboot source as well as read and write hex command/methodologies for this flash.

Please kindly help us to resolve this. And also let us know if you have any patch for this flash.