Has anyone worked with iMX6 ECSPI connected to SPI-NOR flash?

[EdSutter]

I have a SabreSDB board, and I installed an AT25DF321 on U14.  I am able to do *almost* everthing except that after I do a write to the device, the next access is always messed up.  I've verified (with a scope) that the transfer protocol is correct, so I'm kinda at a wall here.  Has anyone done anything with this interface hooked to SPI-NOR flash?

[AlejandroSierra]

Are you sure this spi nor model is supported on the driver?. Check also the timings and configuration for this model.

We have validated M25P32 on our boards

[EdSutter]

I did manage to get this interface working reliably, so I apologize for not posting an update (actually I thought I did).  :-)

Anyway, I found that if I toggle the EN bit of the ECSPIx_CONREG after the write completes, then things work ok.
Seems to me that I should not have to do that, but in my case its ok to do.   Actually, what I do now is toggle the EN

bit prior to any burst access to the device. Can you tell me if you do that in your code?

[AlejandroSierra · Accepted solution]

Each time the SPI driver transfers data the clock of the spi module is enabled. Please take a look to the "drivers/spi/spi_imx.c" source code.

However this clock enablement is NOT done by writing to the EN on ECSPI_CONREG.