linux-kernel - Re: [PATCH 2/2] net: ethernet: Add driver for Sunplus SP7021

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Message-ID: <YYPZN9hPBJTBzVUl@lunn.ch>
Date:   Thu, 4 Nov 2021 13:59:35 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Wells Lu 呂芳騰 <wells.lu@...plus.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Wells Lu <wellslutw@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>
Subject: Re: [PATCH 2/2] net: ethernet: Add driver for Sunplus SP7021

On Thu, Nov 04, 2021 at 05:31:57AM +0000, Wells Lu 呂芳騰 wrote:
> Hi,
> 
> Thanks a lot for review.
> 
> > 
> > > config NET_VENDOR_SUNPLUS
> > > 	bool "Sunplus devices"
> > > 	default y
> > > 	depends on ARCH_SUNPLUS
> > 
> > Does it actually depend on ARCH_SUNPLUS? What do you make use of?
> 
> ARCH_SUNPLUS will be defined for Sunplus family series SoC.
> Ethernet devices of Sunplus are designed and used for Sunplus SoC.
> So far, only two SoC of Sunplus have the network device.
> I'd like to show up the selection only for Sunplus SoC.

So it does not actually depend on ARCH_SUNPLUS. There are a few cases
where drivers have needed to call into arch specific code, which stops
them building for any other arch.

> > Ideally, you want it to also build with COMPILE_TEST, so that the driver gets
> > build by 0-day and all the other build bots.
> 
> I am not sure if this is mandatory or not.
> Should I add COMPILE_TEST as below?
> 
> 	depends on ARCH_SUNPLUS | COMPILE_TEST

Yes.

> Yes, the device is now only for Sunplus SP7021 SoC.
> Devices in each SoC may have a bit difference because of adding new 
> function or improving something.

If it will compile with COMPILE_TEST on x86, mips, etc, you should
allow it to compile with COMPILE_TEST. You get better compile testing
that way.

     Andrew