2007-10-31 14:22:24

by Dave Jones

[permalink] [raw]
Subject: FEC_MPC52xx_MDIO oddness.

The Kconfig for this reads..

+config FEC_MPC52xx_MDIO
+ bool "MPC52xx FEC MDIO bus driver"
+ depends on FEC_MPC52xx
+ default y
+ ---help---
+ The MPC5200's FEC can connect to the Ethernet either with
+ an external MII PHY chip or 10 Mbps 7-wire interface
+ (Motorola? industry standard).
+ If your board uses an external PHY connected to FEC, enable this.
+ If not sure, enable.
+ If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.

Because this is bool, it'll never be compiled as a module.
Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
Should this be a tristate perhaps ?

Dave

--
http://www.codemonkey.org.uk


2007-10-31 15:06:31

by Domen Puncer

[permalink] [raw]
Subject: Re: FEC_MPC52xx_MDIO oddness.

On 31/10/07 10:22 -0400, Dave Jones wrote:
> The Kconfig for this reads..
>
> +config FEC_MPC52xx_MDIO
> + bool "MPC52xx FEC MDIO bus driver"
> + depends on FEC_MPC52xx
> + default y
> + ---help---
> + The MPC5200's FEC can connect to the Ethernet either with
> + an external MII PHY chip or 10 Mbps 7-wire interface
> + (Motorola? industry standard).
> + If your board uses an external PHY connected to FEC, enable this.
> + If not sure, enable.
> + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.
>
> Because this is bool, it'll never be compiled as a module.
> Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
> Should this be a tristate perhaps ?

It's ok, it will be compiled as module if fec driver is compiled as
module, and built-in if fec is built-in.

from Makefile:
obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
endif

Yes, a bit weird, but it's best I could come up with.
(fec_mdio=m and fec=y is an invalid case, that I wanted to avoid).


Domen

>
> Dave
>
> --
> http://www.codemonkey.org.uk

--
Domen Puncer | Research & Development
.............................................................................................
Telargo d.o.o. | Zagrebška cesta 20 | 2000 Maribor | Slovenia
.............................................................................................
http://www.telargo.com

2007-10-31 16:30:57

by Gabriel C

[permalink] [raw]
Subject: Re: FEC_MPC52xx_MDIO oddness.

Domen Puncer wrote:
> On 31/10/07 10:22 -0400, Dave Jones wrote:
>> The Kconfig for this reads..
>>
>> +config FEC_MPC52xx_MDIO
>> + bool "MPC52xx FEC MDIO bus driver"
>> + depends on FEC_MPC52xx
>> + default y
>> + ---help---
>> + The MPC5200's FEC can connect to the Ethernet either with
>> + an external MII PHY chip or 10 Mbps 7-wire interface
>> + (Motorola? industry standard).
>> + If your board uses an external PHY connected to FEC, enable this.
>> + If not sure, enable.
>> + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.
>>
>> Because this is bool, it'll never be compiled as a module.
>> Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
>> Should this be a tristate perhaps ?
>
> It's ok, it will be compiled as module if fec driver is compiled as
> module, and built-in if fec is built-in.
>
> from Makefile:
> obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
> ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
> obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
> endif
>
> Yes, a bit weird, but it's best I could come up with.
> (fec_mdio=m and fec=y is an invalid case, that I wanted to avoid).

Could you please fix this warnings as well ?


http://groups.google.com/group/fa.linux.kernel/browse_thread/thread/13c9d93a7afa60e2

Regards,

Gabriel


2007-10-31 16:42:43

by Domen Puncer

[permalink] [raw]
Subject: Re: FEC_MPC52xx_MDIO oddness.

On 31/10/07 17:30 +0100, Gabriel C wrote:
> Domen Puncer wrote:
> > On 31/10/07 10:22 -0400, Dave Jones wrote:
> >> The Kconfig for this reads..
> >>
> >> +config FEC_MPC52xx_MDIO
> >> + bool "MPC52xx FEC MDIO bus driver"
> >> + depends on FEC_MPC52xx
> >> + default y
> >> + ---help---
> >> + The MPC5200's FEC can connect to the Ethernet either with
> >> + an external MII PHY chip or 10 Mbps 7-wire interface
> >> + (Motorola? industry standard).
> >> + If your board uses an external PHY connected to FEC, enable this.
> >> + If not sure, enable.
> >> + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.
> >>
> >> Because this is bool, it'll never be compiled as a module.
> >> Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
> >> Should this be a tristate perhaps ?
> >
> > It's ok, it will be compiled as module if fec driver is compiled as
> > module, and built-in if fec is built-in.
> >
> > from Makefile:
> > obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
> > ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
> > obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
> > endif
> >
> > Yes, a bit weird, but it's best I could come up with.
> > (fec_mdio=m and fec=y is an invalid case, that I wanted to avoid).
>
> Could you please fix this warnings as well ?
>
>
> http://groups.google.com/group/fa.linux.kernel/browse_thread/thread/13c9d93a7afa60e2

I saw the bug reports, but unfortunately don't have a smart idea for
the solution (moving the driver into a separate Kconfig might do it),
so I'm waiting for Sam's input on this.


>
> Regards,
>
> Gabriel

--
Domen Puncer | Research & Development
.............................................................................................
Telargo d.o.o. | Zagrebška cesta 20 | 2000 Maribor | Slovenia
.............................................................................................
http://www.telargo.com

2007-10-31 16:50:59

by Randy Dunlap

[permalink] [raw]
Subject: Re: FEC_MPC52xx_MDIO oddness.

On Wed, 31 Oct 2007 17:42:32 +0100 Domen Puncer wrote:

> On 31/10/07 17:30 +0100, Gabriel C wrote:
> > Domen Puncer wrote:
> > > On 31/10/07 10:22 -0400, Dave Jones wrote:
> > >> The Kconfig for this reads..
> > >>
> > >> +config FEC_MPC52xx_MDIO
> > >> + bool "MPC52xx FEC MDIO bus driver"
> > >> + depends on FEC_MPC52xx
> > >> + default y
> > >> + ---help---
> > >> + The MPC5200's FEC can connect to the Ethernet either with
> > >> + an external MII PHY chip or 10 Mbps 7-wire interface
> > >> + (Motorola? industry standard).
> > >> + If your board uses an external PHY connected to FEC, enable this.
> > >> + If not sure, enable.
> > >> + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.
> > >>
> > >> Because this is bool, it'll never be compiled as a module.
> > >> Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
> > >> Should this be a tristate perhaps ?
> > >
> > > It's ok, it will be compiled as module if fec driver is compiled as
> > > module, and built-in if fec is built-in.
> > >
> > > from Makefile:
> > > obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
> > > ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
> > > obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
> > > endif
> > >
> > > Yes, a bit weird, but it's best I could come up with.
> > > (fec_mdio=m and fec=y is an invalid case, that I wanted to avoid).
> >
> > Could you please fix this warnings as well ?
> >
> >
> > http://groups.google.com/group/fa.linux.kernel/browse_thread/thread/13c9d93a7afa60e2
>
> I saw the bug reports, but unfortunately don't have a smart idea for
> the solution (moving the driver into a separate Kconfig might do it),
> so I'm waiting for Sam's input on this.

Hi Domen,

I'd like to see what Sam says also.

Using a separate Kconfig probably won't help much since this construct:

if PPC_52xx
source "Kconfig.fec"
endif

will still be read/parsed by kconfig software. I.e., the "if" line
just adds a dependency to the config symbols in Kconfig.fec. It does
not keep the file from being read/parsed.


---
~Randy

2007-10-31 16:52:33

by Gabriel C

[permalink] [raw]
Subject: Re: FEC_MPC52xx_MDIO oddness.

Domen Puncer wrote:
> On 31/10/07 17:30 +0100, Gabriel C wrote:
>> Domen Puncer wrote:
>>> On 31/10/07 10:22 -0400, Dave Jones wrote:
>>>> The Kconfig for this reads..
>>>>
>>>> +config FEC_MPC52xx_MDIO
>>>> + bool "MPC52xx FEC MDIO bus driver"
>>>> + depends on FEC_MPC52xx
>>>> + default y
>>>> + ---help---
>>>> + The MPC5200's FEC can connect to the Ethernet either with
>>>> + an external MII PHY chip or 10 Mbps 7-wire interface
>>>> + (Motorola? industry standard).
>>>> + If your board uses an external PHY connected to FEC, enable this.
>>>> + If not sure, enable.
>>>> + If compiled as module, it will be called 'fec_mpc52xx_phy.ko'.
>>>>
>>>> Because this is bool, it'll never be compiled as a module.
>>>> Given that fec_mpc52xx_phy.c has a MODULE_LICENSE()
>>>> Should this be a tristate perhaps ?
>>> It's ok, it will be compiled as module if fec driver is compiled as
>>> module, and built-in if fec is built-in.
>>>
>>> from Makefile:
>>> obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
>>> ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
>>> obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
>>> endif
>>>
>>> Yes, a bit weird, but it's best I could come up with.
>>> (fec_mdio=m and fec=y is an invalid case, that I wanted to avoid).
>> Could you please fix this warnings as well ?
>>
>>
>> http://groups.google.com/group/fa.linux.kernel/browse_thread/thread/13c9d93a7afa60e2
>
> I saw the bug reports, but unfortunately don't have a smart idea for
> the solution (moving the driver into a separate Kconfig might do it),
> so I'm waiting for Sam's input on this.

Added Sam and Adrian to CC , maybe Adrian knows some trick for this select stuff as well.