netdev - Re: [PATCH v3 0/2] Add macb support for SiFive FU540-C000

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Date:   Tue, 18 Jun 2019 23:27:56 +0000
From:   Atish Patra <Atish.Patra@....com>
To:     "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "yash.shah@...ive.com" <yash.shah@...ive.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "sachin.ghadi@...ive.com" <sachin.ghadi@...ive.com>,
        "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "ynezz@...e.cz" <ynezz@...e.cz>,
        "palmer@...ive.com" <palmer@...ive.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
Subject: Re: [PATCH v3 0/2] Add macb support for SiFive FU540-C000

On Tue, 2019-06-18 at 13:26 +0530, Yash Shah 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.
> 
> Future patches may add support for monitoring or controlling other IP
> boundary signals.
> 
> This patchset is mostly based on work done by
> Wesley Terpstra <wesley@...ive.com>
> 
> This patchset is based on Linux v5.2-rc1 and tested on HiFive
> Unleashed
> board with additional board related patches needed for testing can be
> found at dev/yashs/ethernet_v3 branch of:
> https://github.com/yashshah7/riscv-linux.git
> 
> Change History:
> V3:
> - Revert "MACB_SIFIVE_FU540" config changes in Kconfig and driver
> code.
>   The driver does not depend on SiFive GPIO driver.
> 
> V2:
> - Change compatible string from "cdns,fu540-macb" to "sifive,fu540-
> macb"
> - Add "MACB_SIFIVE_FU540" in Kconfig to support SiFive FU540 in macb
>   driver. This is needed because on FU540, the macb driver depends on
>   SiFive GPIO driver.
> - Avoid writing the result of a comparison to a register.
> - Fix the issue of probe fail on reloading the module reported by:
>   Andreas Schwab <schwab@...e.de>
> 
> Yash Shah (2):
>   macb: bindings doc: add sifive fu540-c000 binding
>   macb: Add support for SiFive FU540-C000
> 
>  Documentation/devicetree/bindings/net/macb.txt |   3 +
>  drivers/net/ethernet/cadence/macb_main.c       | 123
> +++++++++++++++++++++++++
>  2 files changed, 126 insertions(+)
> 

Can you also post the ethernet dt entry[1] along with this patch ?
I think it would be good to all the dt related stuff reviewed together.

[1] 
https://github.com/yashshah7/riscv-linux/commit/6d3af64bc5efed3915d658dc3bfe82dc1dbfafb3

I am able to get networking up in latest kernel + your patches in
OpenSBI + U-Boot(with updated compatible string) + Linux bootflow.

Tested-by: Atish Patra <atish.patra@....com>

Regards,
Atish