STM32-CRC module build issue.

[NPal.2]

Hi all,

I have been trying to build a custom machine based on STM32MP157C MPU. Right now I am facing a weird issue.

Defconfig file is attached. However upon giving build , i cannot see the stm32-crc module , built added and loaded. Is there something which i am missing?

TIA

[Kevin HUBER · Accepted solution]

Hello @NPal.2​ ,

The configuration that interest you is "CONFIG_CRYPTO_DEV_STM32_CRC".

We can see in your defconfig_file that this configuration is enabled, but as a built-in and not a module:

CONFIG_CRYPTO_DEV_STM32_CRC=y
CONFIG_CRYPTO_DEV_STM32_HASH=y
CONFIG_CRYPTO_DEV_STM32_CRYP=y

You have "Y" instead of "m".

For instance, if you look at the defconfig file from the developer package v3.1, you will see:

CONFIG_CRYPTO_DEV_STM32_CRC=m
CONFIG_CRYPTO_DEV_STM32_HASH=m
CONFIG_CRYPTO_DEV_STM32_CRYP=m

To modify that, you have to use the "make menuconfig" search the 3 configs "CONFIG_CRYPTO_DEV_STM32"

  Location:                                                            

 │   -> Cryptographic API (CRYPTO [=y])                                             

 │    -> Hardware crypto devices (CRYPTO_HW [=y]) 

And press the space key several times until you have switched all of them into modules:

 

Hope it helps,

Regards,

Kevin

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[NPal.2]

@Kevin HUBER​ Thank you for the quick response. I tried what you suggested. The module does get built and i can it inside the /lib/modules/kernel/drivers/crypto directory. But when i try to perform a modprobe it fails. Any clues why?

[NPal.2]

Never mind. I just checked that it has been loaded as stm32_crc . Looks good now thanks for the support.