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

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Message-ID: <alpine.DEB.2.21.9999.1906172019040.15057@viisi.sifive.com>
Date:   Mon, 17 Jun 2019 20:26:14 -0700 (PDT)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     Alistair Francis <Alistair.Francis@....com>
cc:     "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>,
        "palmer@...ive.com" <palmer@...ive.com>,
        "yash.shah@...ive.com" <yash.shah@...ive.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
Subject: Re: [PATCH v2 0/2] Add macb support for SiFive FU540-C000

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.


- Paul