Hi Rogan, On Tue, Aug 22, 2023 at 6:42 AM Rogan Dawes <ro...@dawes.za.net> wrote: > > Hi Fabio, > > As far as I am aware, the U-boot source for the Wink hub has not been > made available anywhere. That said, the RAM chip in use on the board
Was there a formal request for the U-Boot source code to Wink? As per the GPL license, they have to share the U-Boot source code. > is marked D9LPX, which apparently corresponds to the following item: > https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/dram/ddr2/512mbddr2.pdf?rev=2c70f8a2b207452584b2bf040de8d771 There is a tool from NXP that helps with the i.MX28 DDR2 controller initialization for a specific DDR model: https://community.nxp.com/pwmxy87654/attachments/pwmxy87654/imx-processors/9552/1/MX28_DDR2_register_programming_aid_v0.2.xlsx The DDR initialization values obtained from this tool are then used in U-Boot inside the 'mxs_dram_vals' array. There is a common DDR configuration at arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c. Most likely, in your case, it will require a custom mxs_dram_vals initialization, like it is done at board/liebherr/xea/spl_xea.c. > I did try to change the iomux_cfg_t as suggested above, built using > make mx28evk_defconfig && make u-boot.sb, and used mxsldr to try load > it, to no avail. There was no output on the serial port at all, or any > other suggestion that anything was running. It has been a long time since I used the mxsldr tool. When time permits, I can try to load a recent U-Boot over USB using this tool on a imx28-evk. Cheers
