More than 4 CS lines for SPI

[marcus_cps]

The documentation for iMX6UL and iMX8 says SPI has 4 CS lines.

I intend to use a total of 12 SPI devices connected to SPI1, 2 and 3 (4 in each).
As far as I understood, I can configure CS pins as GPIO and use the kernel driver configurations to define all 12 CS lines from GPIOs.

Is my understanding correct or is there some hardware limitation I'm missing?

Thanks

[igorpadykov · Accepted solution]

Hi Marcus

yes this understanding is correct.

Best regards
igor
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