AnsweredAssumed Answered

Vybrid (vf610) QSPI HW issues

Question asked by Łukasz Majewski on Sep 21, 2018
Latest reply on Nov 12, 2018 by Łukasz Majewski

Dear Community,

 

I'd like to ask for two QSPI specific issues:

 

1. In the current Linux kernel driver - there is a comment regarding the QSPI working in "IP Command Read" mode:

Linux source code: drivers/mtd/spi-nor/fsl-quadspi.c (v4.19-rc4) - Bootlin 

It states that on Vybrid it is broken and shall not be used. Could anybody from HW design team comment on it?

 

2. When I do use AHB mode to read data from two SPI-NOR memories connected to QSPI0 bus (individual mode), only 64 bytes are read correctly. The original Linux driver though wants to read 128 bytes:

Linux source code: drivers/mtd/spi-nor/fsl-quadspi.c (v4.19-rc4) - Bootlin 

 

What is the recommended size for AHB memory transfer size for QSPI?

 

Thanks in advance,

Łukasz

Outcomes