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  1. Hello ! In my project I need use 2 spi bus : /dev/spidev1.0 and /dev/spi2.0 /dev/spidev1.0 for 3.5inch rpi display and /dev/spidev2.0 for 8x8 led matrices, such as MAX7219-8x32-MCU-Drive-LED If I am use legacy kernel (3.4.113-sun7i) both spi buses work well But if use mainline kernel (4.14.18-sunxi), I can use only 1 spi bus This is my armbianEnv.txt: overlays=spi-spidev spi1 spi2 param_spidev_spi_bus=1 In this case I can use /dev/spidev1.0 If I set param_spidev_spi_bus=2 I can use /dev/spidev2.0 How to enable 2 spi buses at the same time ?
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  3. Hello ! I am use A20-OLinuXino-MICRO-e4GB Debian server image with mainline kernel work fine with eMMC, but I need eMMC support in Ubuntu desktop with legacy kernel. How I can do it ? Sorry for bad English :-) I hope, you understood me :-). Thank !