On Sat, Jan 10, 2026 at 03:20:39AM +0000, Christopher Obbard wrote: > Hi Fabio, > > On Thu, 2025-12-18 at 23:45 -0300, Fabio Estevam wrote: > > Hi, > > > > I have a custom board based on the Rockchip evb-rv1103 (RV1103B silicon), > > booting from SPI-NAND. > > > > I can successfully boot the vendor Rockchip U-Boot v2017.09 on this board, > > from SPI-NAND > > > > I am currently working on upstreaming U-Boot support for the RV1103B SoC. > > My first RFC attempt is available here: > > > > https://github.com/fabioestevam/u-boot/commits/rv1103/ > > > > Build steps: > > > > make evb-rv1103_defconfig > > make > > > > However, I am not yet able to boot U-Boot on the board. At the moment, > > the board does not boot and only prints "RKUART". > > > > My initial plan was to avoid SPL, similar to the evb-rv1108 approach > > (described in board/rockchip/evb_rv1108/README). > > > > Before going further, I would like to ask: > > > > Is the evb-rv1108 “no SPL” boot flow a valid reference for RV1103B? > > > > Great to see the RV1103 being upstreamed! > > > I have a Rockchip RV1106 based board, the CoolPi 1B > https://www.cool-pi.com/product-category/gateway/cp1b/ which I'd also like to > get in upstream linux/u-boot. > > The downstream kernel/devicetree is at > https://github.com/coolpi-george/coolpi-kernel/blob/linux-5.10-gen-rkr8/arch/arm/boot/dts/rv1106-cp1b.dts > with defconfig > https://github.com/coolpi-george/coolpi-kernel/blob/linux-5.10-gen-rkr8/arch/arm/configs/rv1106_cp1b_defconfig > > The downstream u-boot is > https://github.com/coolpi-george/coolpi-loader/blob/develop/configs/rv1106_coolpicp1b_defconfig > > I wonder how similar the RV1106 SoC is to the RV1103 you're working on ?
Given that the devicetree for RV1103 in Rockchip downstream kernel tree includes RV1106's devicetree[1] and only adds some overrides, I'd like to say RV1103 is basically only in a different package. They're likely the same silicon, probably with different qualities. > I only ask since the RV1106 SoC has a similar prefix to the RV1103. I don't > have any other information about the SoC. > > > Cheers! > > Chris Regards, Yao Zi [1]: https://github.com/rockchip-linux/kernel/blob/1ba51b059f25533c5529b7f68186190b47d6a7b3/arch/arm/boot/dts/rockchip/rv1103.dtsi#L6
