netdev - Re: [PATCH v2 0/2] Add macb support for SiFive FU540-C000

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Date:   Tue, 18 Jun 2019 15:02:45 +0530
From:   Anup Patel <anup@...infault.org>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        "palmer@...ive.com" <palmer@...ive.com>
Cc:     Alistair Francis <Alistair.Francis@....com>,
        "troy.benjegerdes@...ive.com" <troy.benjegerdes@...ive.com>,
        "jamez@....com" <jamez@....com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "schwab@...e.de" <schwab@...e.de>,
        "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "sachin.ghadi@...ive.com" <sachin.ghadi@...ive.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "ynezz@...e.cz" <ynezz@...e.cz>,
        "yash.shah@...ive.com" <yash.shah@...ive.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Atish Patra <atish.patra@....com>,
        Bin Meng <bmeng.cn@...il.com>,
        Lukas Auer <lukas.auer@...ec.fraunhofer.de>
Subject: Re: [PATCH v2 0/2] Add macb support for SiFive FU540-C000

On Tue, Jun 18, 2019 at 8:56 AM Paul Walmsley <paul.walmsley@...ive.com> 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

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