I got three pieces of those RockPi 4 v1.4B 4GB. I didn’t order a SPI flash built-in, but I received with this EEPROM chip on board. Now the problem is to have a SPI1 device, since the CS0 is already occupied by flash IC. I am searching to solve the problem by simply using a GPIO for CS1 , but unfortunately the RK3399 doesn’t support cs-gpios in the main linux kernel.
Is there any solution, there are also some custom patches for Linux system to add a cs-gpios, but isn’t up to Rockchip to make a version of their devices to add support for cs-gpios?