[PR] Imx9 support flexspi m25p nor [nuttx]

["jlaitine (via GitHub)" <gi...@apache.org>]

jlaitine opened a new pull request, #12632:
URL: https://github.com/apache/nuttx/pull/12632

   ## Summary
   
   This adds an initial support for m25p nor flash devices, connected to the FlexSPI bus, for the IMX9. The support consists of two parts:
   
   - flexspi bus driver, ported from imxrt, there are changes to clock configurations, base addresses etc.
   - flexspi nor MTD driver, partly copied from imxrt board specific code, partly from m25p generic driver. Parts are quite heavily modified though
   
   The idea is that NOR MTD driver part can be later expanded to support other than M25P parts, if needed.
   
   The board configuration is not added to this PR, as connecting the NOR flash requires custom HW; this is not directly available.
   
   ## Impact
   
   Impacts only IMX9 targets, adds support for FlexSPI and M25P NOR flash connected as quad.
   
   ## Testing
   
   Tested on IMX93 EVK board, connecting an M25P device to the bottom connector, enabling the NuttX configurations and initializing MTD partitions, FTL and BCHDEV int the board logic, opening the bch device, writing data to the NOR and reading it back, comparing data.
   


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Re: [PR] Imx9 support flexspi m25p nor [nuttx]

["anchao (via GitHub)" <gi...@apache.org>]

anchao merged PR #12632:
URL: https://github.com/apache/nuttx/pull/12632


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