Power & Source of Big Ideas

So http://opensource.rock-chips.com/wiki_Boot_option describes two boot options: Rockchip-Miniloader and U-Boot TPL https://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf A TPL (Tertiary Program Loader) is required due to SRAM/L2 cache limitations. It can barely init the DDR RAM...
Thanks for your reply. Let me rephrase my question: Rockchip is the manufacturer of the rk3399. As chip manufacturer they could only provide a bootloader until stage 1 (http://opensource.rock-chips.com/wiki_Boot_option). To help distributors they also provide a complete BSP including a full-fledged ...
What is the correct branch for SOM-RK3399 or NanoPC-T4? Rockchip recommends next-dev which I used. I see Rockchip does not provide the .bin files like in FriendlyARMS's tools/rk_tools/bin directory. Are they built as TPL/SPL on the fly? Also when the original u-boot from rockchip works with Friendly...
Why can't I use u-boot.img generated from https://github.com/rockchip-linux/u-boot on FriendlyARM-devices? When I flash original rockchip-MiniLoader I brick the SOM-RK3399 or NanoPC-T4 and need to recover with tweezers. More specifically: nanopi4-v2014.10_oreo from https://github.com/friendlyarm/ubo...
So this is the correct dtsi config in arch/arm64/boot/dts/rockchip/rk3399-nanopi4-common.dtsi / { model = "FriendlyElec boards based on Rockchip RK3399"; compatible = "friendlyelec,nanopi4", "rockchip,rk3399"; clocks { /* 8MHz external crystal oscillator */ clk8m: mcp25...
I think more info is needed. Hardware used: SOM-RK3399 with SOM-RK339 Dev-Kit. Wiring infos: |MCP2515 | SOM-RK3399 pin | dev_kit Connector | Signal name | |----------|------------------------|--------------------|----------------------------| |SCK | SPI1_CLK (62) | CON8 pin 7 | GPIO1_B1 | |SI | SPI1...
I've enabled SPI via UART4 with the help of this post There is a dst file for NVIDEA Tegra boards here However I have difficulties to enable the MPC2515 CAN controller via SPI, since I don't know how to bring up the correct DST config. Here is my config from arch/arm64/boot/dts/rockchip/rk3399-nanop...