linux-kernel - Re: [net-next PATCH v7 08/16] net: mdiobus: Introduce fwnode_mdiobus_register

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Message-ID: <CAHp75VccA=dM8XRe1_ZS28mZ0Ehy_W-yg4_19VOH3KF=+hBu7g@mail.gmail.com>
Date:   Thu, 11 Mar 2021 20:14:44 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Calvin Johnson <calvin.johnson@....nxp.com>
Cc:     Grant Likely <grant.likely@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jeremy Linton <jeremy.linton@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Pieter Jansen Van Vuuren <pieter.jansenvv@...boosystems.io>,
        Jon <jon@...id-run.com>, Saravana Kannan <saravanak@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Diana Madalina Craciun <diana.craciun@....com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux.cj" <linux.cj@...il.com>, netdev <netdev@...r.kernel.org>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Frank Rowand <frowand.list@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>
Subject: Re: [net-next PATCH v7 08/16] net: mdiobus: Introduce fwnode_mdiobus_register_phy()

On Thu, Mar 11, 2021 at 8:00 PM Calvin Johnson
<calvin.johnson@....nxp.com> wrote:
> On Thu, Mar 11, 2021 at 02:09:37PM +0200, Andy Shevchenko wrote:
> > On Thu, Mar 11, 2021 at 8:21 AM Calvin Johnson
> > <calvin.johnson@....nxp.com> wrote:

...

> > > +config FWNODE_MDIO
> > > +       def_tristate PHYLIB
> >
> > (Seems "selectable only" item)
>
> What do you mean by "selectable only" item here? Can you please point to some
> other example?

The Kconfig sections without descriptions are not user-visible.
No user can run menuconfig and check a box with "I want this to be compiled".

tristate // selectable-only
tristate "bla bla bla" // user visible and selectable

> > > +       depends on ACPI
> > > +       depends on OF
> >
> > Wouldn't be better to have
> >   depends on (ACPI || OF) || COMPILE_TEST
> >
> > And honestly I don't understand it in either (AND or OR) variant. Why
> > do you need a dependency like this for fwnode API?
>
> Here, fwnode_mdiobus_register_phy() uses objects from both ACPI and OF.

APIs? Calls? What really fails if we have !ACPI and / or !OF?

> > Moreover dependencies don't work for "selectable only" items.
> >
> > > +       depends on PHYLIB
> > > +       select FIXED_PHY

--
With Best Regards,
Andy Shevchenko