STM32 MPUs Embedded software and solutions

STM32MP135: SAI missing clock error at boot time

I generated the device tree for the STM32MP135-DK to include the tlv320aic31xx audio codec connected to the sai1a port, but during the boot I get the following errors. [  90.094282] st,stm32-sai 4400a000.sai: missing x8k parent clock: -2[  90.155023]...

pins_a and pins_b and pins_c for i2c2 so what is the effect of configuring multiple sets of pins for i2c2? Are they sharing i2c2 bus ? Are they sharing the driver ? Is it always better to configure another bus eg. i2c5 instead of i2c2_pins_b ?

How to solve core data - abort at address tee load address error

An error appears when executing the crypto_skipher_decrypt(tfm)->decrypt(req) code inside the linux-custom directory of the buildroot. Some violation seems to occur when calling the decrypt(req) function. If I annotate that part, the error doesn't co...

spi Overrun: RX data lost when "spi_sync_transfer" too long in kernel

Hi,I would like to make my STM32MP157 communicate with a FPGA in spi. I need to make long transfer (2-3 Mb) spi to get data acquired by the FPGA. But when I use the "spi_sync_transfer" function in my driver, I get the following kernel message:#spi_st...

How to remove APT and DPKG from yocto build

Hello,We are using st-image-core from recipes-st in yocto and I'm removing some packages from the build that we don't really need. While going through the list, I have found that apt and dpkg are being built and I would like to remove them from my im...

Kernel-5.15 bootloader dependency

Hi All!! I am currently using openstlinux-5.10-dunfell-mp1-21-11-17 for EV1. My idea is upgrade kernel version to 5.15 and keep u-boot-2020.10 and tf-a-2.4. My problem is that only upgrading the kernel and dtb, the kernel crashes and doesn't show any...

Can I use a source code from Design Tips in a project under GPL v2 license?

I have a small project under GPL v2 license which will not necessarily be used on STM device (maybe, but most likely not).   There is a "Design Tip (DT0085)" which have some reference source code and I want to use it in my project (esp. page 7). I ca...