After linux bootup on STM32MP157C custom board with kernel build 5.4.31, I load and start M4 with remoteproc successfully, but every time when linux access uart8@40019000, M4 side firmware stopped, the two command i used to test is "echo 123 > /dev/t...

On my custom board, I configured PZ0, PZ1, PZ2 for SPI1 with device tree, and linux kernel probed successfully and populate spidev node and it works fine, but if look at debug information in /sys/kernel/debug/pinctrl/, it populate something like "pin...

To bootup STM32MP157 from SD card, the layout for SD is partition#1, u-boot-spl.stm32, first copy of first stage bootloader partition#2, u-boot-spl.stm32, second copy of first stage bootloader partition#3, u-boot.img, second stage bootloader partitio...

With STM32MP157C-DK2 kit, I am testing U-boot standalone example "hello world" application, it print out some information and then stay in a loop until a key input detected to terminate the application. I found out the example code running for about ...

With STM32MP157C-DK2, I like to exercise SPI5 hardware, to use this interface to do talk to FPGA and DSP chips. And I need to use SPI5 in both U-boot and Linux runtime, here I got some issues to enable the SPI5 device.1, Within U-boot.How to enable S...