A523/A527 SPI Flash support?

[RoganDawes]

Hi folks,

Is there anyone looking at implementing SPI flash support for the A523/A527, and possibly T527 chip? I have just received my pre-order of the Radxa A5E, and am trying to write their NOR image to the SPI flash. My distro didn't recognise the chip, so I cloned the repo, built and tried spiflash-info, only to be told that it is not yet supported.

Thanks!

Rogan

[apritzel]

The manual suggests that the SPI controller in the A523/A527/T527 (all the same chip) is compatible to the previous one, however it doesn't work. Poking around in the BSP reveals that apparently the FIFO status register at 0x1c no longer reports the FIFO level, instead this is now done with a new register at offset 0x400.
So this would require some changes in the code, on top of the expected SoC adaptations (pinmux, clocks). I have a (non-working) patch for the latter, but didn't try the new FIFO register yet.