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AM2431: How to use 1-1-4 mode Flash device

Hideaki Matsumoto
Genius 9765 points

Part Number: AM2431

Hi,

My customer has a question about booting with a custom Flash device. They are considering to use a custom QSPI Flash device operated in 1-1-4 mode.

Can AM243x and its Flash driver support 1-1-4 mode Flash ?

Writing flash driver for a custom flash device

Introduction

The flash driver provided in the SDK package can communicate with a limited number of flashes as listed in Flash. While we can always talk to a flash in 1S-1S-1S mode of communication after a soft reset, the data throughput offered by this mode will be quite less compared the maximum supported by the flash (4S-4D-4D or 8D-8D-8D)

In order to support 1-1-4 mode, do they need to modify the following source codes ?
・flash_nor_ospi_quad.c
・flash_nor_ospi_quad.h

Hideaki