On Tue, 2019-06-18 at 15:02 +0530, Anup Patel wrote: > On Tue, Jun 18, 2019 at 8:56 AM Paul Walmsley < > paul.walmsley@xxxxxxxxxx> wrote: > > On Mon, 17 Jun 2019, Alistair Francis wrote: > > > > > > The legacy M-mode U-boot handles the phy reset already, and > > > > I’ve been > > > > able to load upstream S-mode uboot as a payload via TFTP, and > > > > then > > > > load and boot a 4.19 kernel. > > > > > > > > It would be nice to get this all working with 5.x, however > > > > there are > > > > still > > > > several missing pieces to really have it work well. > > > > > > Let me know what is still missing/doesn't work and I can add it. > > > At the > > > moment the only known issue I know of is a missing SD card driver > > > in U- > > > Boot. > > > > The DT data has changed between the non-upstream data that people > > developed against previously, vs. the DT data that just went > > upstream > > here: > > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=72296bde4f4207566872ee355950a59cbc29f852 > > > > and > > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c35f1b87fc595807ff15d2834d241f9771497205 > > > > So Upstream U-Boot is going to need several patches to get things > > working > > again. Clock identifiers and Ethernet are two known areas. > > Done. > > I just send-out few patches to fix U-Boot SiFive Clock driver. > > The U-Boot SiFive Clock driver fix series can be found in > riscv_unleashed_clk_sync_v1 branch of: > https://github.com/avpatel/u-boot.git > > Users will also require OpenSBI DTB fix which can be found > in sifive_unleashed_dtb_fix_v1 branch of: > https://github.com/avpatel/opensbi.git > Additionally, user can also use FW_PAYLOAD_FDT_PATH argument during build to include the dtb built from kernel. example: make -j 32 PLATFORM=sifive/fu540 FW_PAYLOAD_PATH=<u-boot path>/u- boot.bin FW_PAYLOAD_FDT_PATH=<kernel_dtb_path> > With above fixes, we can now use same DTB for both U-Boot > and Linux kernel (5.2-rc1). Although, users are free to pass a > different DTB to Linux kernel via TFTP. > > I have tested SiFive serial and Cadance MACB ethernet on > both U-Boot and Linux (5.2-rc1) > > Regards, > Anup -- Regards, Atish
