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From:   Yash Shah <yash.shah@sifive.com>
Date:   Fri, 24 May 2019 10:09:58 +0530
Message-ID: <CAJ2_jOEr5J7_-81MjUE63OSFKL-p9whEZ_FDBihojXP2wvadVg@mail.gmail.com>
Subject: Re: [PATCH 0/2] net: macb: Add support for SiFive FU540-C000
To:     Andreas Schwab <schwab@suse.de>
Cc:     davem@davemloft.net, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        devicetree@vger.kernel.org, robh+dt@kernel.org,
        mark.rutland@arm.com, nicolas.ferre@microchip.com,
        Palmer Dabbelt <palmer@sifive.com>, aou@eecs.berkeley.edu,
        ynezz@true.cz, Paul Walmsley <paul.walmsley@sifive.com>,
        Sachin Ghadi <sachin.ghadi@sifive.com>
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Hi Andreas,

On Thu, May 23, 2019 at 6:19 PM Andreas Schwab <schwab@suse.de> wrote:
>
> On Mai 23 2019, Yash Shah <yash.shah@sifive.com> wrote:
>
> > On FU540, the management IP block is tightly coupled with the Cadence
> > MACB IP block. It manages many of the boundary signals from the MACB IP
> > This patchset controls the tx_clk input signal to the MACB IP. It
> > switches between the local TX clock (125MHz) and PHY TX clocks. This
> > is necessary to toggle between 1Gb and 100/10Mb speeds.
>
> Doesn't work for me:
>
> [  365.842801] macb: probe of 10090000.ethernet failed with error -17
>

Make sure you have applied all the patches needed for testing found at
dev/yashs/ethernet branch of:
https://github.com/yashshah7/riscv-linux.git

In addition to that, make sure in your kernel config GPIO_SIFIVE=y
In v2 of this patch, I will add this select GPIO_SIFIVE config in the
Cadence Kconfig file.

- Yash