[RFC PATCH v2 11/11] riscv: soc: Allwinner D1 GMAC driver only for temp use

[Guo Ren]

Sorry, wast your time reviewing the patch. It's not ready to merge,
just for the test.

On Mon, Jun 7, 2021 at 12:19 AM Arnd Bergmann <arnd at arndb.de> wrote:
>
> On Sun, Jun 6, 2021 at 11:04 AM <guoren at kernel.org> wrote:
>
> > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > index cd9f7c9..31b681d 100644
> > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1-nezha-kit.dts
> > @@ -11,7 +11,7 @@
> >         compatible = "allwinner,d1-nezha-kit";
> >
> >         chosen {
> > -               bootargs = "console=ttyS0,115200";
> > +               bootargs = "console=ttyS0,115200 rootwait init=/sbin/init root=/dev/nfs rw nfsroot=192.168.101.200:/tmp/rootfs_nfs,v3,tcp,nolock ip=192.168.101.23";
>
> These are not board specific options, they should be set by the bootloader
> according to the network environment. It clearly doens't belong
> into this patch .
>
> >                 stdout-path = &serial0;
> >         };
> >
> > diff --git a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > index 11cd938..d317e19 100644
> > --- a/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > +++ b/arch/riscv/boot/dts/allwinner/allwinner-d1.dtsi
> > @@ -80,5 +80,21 @@
> >                         clocks = <&dummy_apb>;
> >                         status = "disabled";
> >                 };
> > +
> > +               eth at 4500000 {
> > +                       compatible = "allwinner,sunxi-gmac";
> > +                       reg = <0x00 0x4500000 0x00 0x10000 0x00 0x3000030 0x00 0x04>;
> > +                       interrupts-extended = <&plic 0x3e 0x04>;
> > +                       interrupt-names = "gmacirq";
> > +                       device_type = "gmac0";
> > +                       phy-mode = "rgmii";
> > +                       use_ephy25m = <0x01>;
> > +                       tx-delay = <0x03>;
> > +                       rx-delay = <0x03>;
> > +                       gmac-power0;
> > +                       gmac-power1;
> > +                       gmac-power2;
> > +                       status = "okay";
> > +               };
>
> Before you add this in the dts file, the properties need to be documented in
> the binding file. The "allwinner,sunxi-gmac" identifier does not appear to
> be specific enough here, and the properties don't match what dwmac uses,
> which would make it unnecessarily hard to change to the other driver
> later on without breaking compatibility to old dtb files.
>
> > +++ b/drivers/net/ethernet/allwinnertmp/sunxi-gmac-ops.c
> > @@ -0,0 +1,690 @@
> > +/*
> > + * linux/drivers/net/ethernet/allwinner/sunxi_gmac_ops.c
> > + *
> > + * Copyright © 2016-2018, fuzhaoke
> > + *             Author: fuzhaoke <fuzhaoke at allwinnertech.com>
> > + *
> > + * This file is provided under a dual BSD/GPL license.  When using or
> > + * redistributing this file, you may do so under either license.
>
> Are you sure this is the correct copyright information and "fuzhaoke" is
> the copyright holder for this file? If this is derived from either the
> designware
> code or the Linux stmmac driver, the authors should be mentioned,
> and the license be compatible with the original license terms.
>
> Andre already commented on the driver quality and code duplication, those are
> also show-stoppers, but the unclear license terms and dt binding compatibility
> are even stronger reasons to not get anywhere close to this driver.
>
>         Arnd



-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/