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How to enable QSPI encryption

Hello,

Does the nRF Connect SDK support enabling QSPI encrytpion (DMA, XIP)?

I see there are two functions in the nrfx_qspi.c that do this: nrfx_qspi_xip_encrypt and nrfx_qspi_dma_encrypt. But the Zepher driver in nrf_qspi_nor.c doesn't reference them and that makes me think that QSPI encryption isn't supported by the driver.

I'm using latest NCS.

Thanks

0 user78697 over 4 years ago

Forgot to mention, I'm using nRF5340 device.
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0 user103347 over 4 years ago

Hello!

The Zephyr flash API does not currently provide any method of configuring encryption for transfers performed with the flash chip, hence the nrf_qspi_nor driver does not call nrfx_qspi_dma_encrypt() or nrfx_qspi_xip_encrypt(). But it should be possible to call those functions outside of the driver, after the driver is initialized but before any transfer is performed, to enable encryption for DMA and/or XIP transfers (nothing needs to be changed in the driver itself).

Could this be a solution for you?

Best regards,

Elfving
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0 user78697 over 4 years ago

Hi Elfving,

Thanks for the clarification. I thought Zephyr would be placing its constraints here.

I modified the nrf_qspi_nor init function to call the *_encrypt().
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0 user103347 over 4 years ago in reply to user78697

Great!

Best regards,

Elfving
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