[U-Boot] PHY lib

[U-Boot] PHY lib

[Michal Simek]

Hi Ben,

how does look like your propose work about PHY lib?

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854

[U-Boot] PHY lib

[Ben Warren]

Hi Michal,
Michal Simek wrote:
> Hi Ben,
>
> how does look like your propose work about PHY lib?
>
> Thanks,
> Michal
>
>   
I'd like to have the PHY library included in the 02.2009 release.  One 
of the things I'm struggling with is how so specify MDIO busses and PHY 
addresses.  For example, is it preferable to have a bunch of 
CONFIG_PHY_ADDR_x or a board-code struct?  How to link/register PHYs 
with MDIO buses, since conceivably a board could have hardware MDIO 
and/or bit-banged MDIO, and any PHY could be on any bus. 

If we pulled all board info from a device tree, as people were talking 
about a few months ago, this would be easy and scalable.  I don't know 
the status of that idea, and am very interested in what you and others 
think.

regards,
Ben

[U-Boot] PHY lib

[Wolfgang Denk]

Dear Ben,

In message <492C4475.70306@gmail.com> you wrote:
>
> I'd like to have the PHY library included in the 02.2009 release.  One 

v2009.02, that is :-)

> If we pulled all board info from a device tree, as people were talking 
> about a few months ago, this would be easy and scalable.  I don't know 
> the status of that idea, and am very interested in what you and others 
> think.

I would really appreciate a move into this direction.

BTW - Wolfgang: do you still plan to rebase &  post  your  "Configure
U-Boot  with a Device Tree" patches? They must have grown out of sync
terribly?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Veni, Vidi, VISA:
        I came, I saw, I did a little shopping.

[U-Boot] PHY lib

[Wolfgang Grandegger]

Wolfgang Denk wrote:
> Dear Ben,
> 
> In message <492C4475.70306@gmail.com> you wrote:
>> I'd like to have the PHY library included in the 02.2009 release.  One 
> 
> v2009.02, that is :-)
> 
>> If we pulled all board info from a device tree, as people were talking 
>> about a few months ago, this would be easy and scalable.  I don't know 
>> the status of that idea, and am very interested in what you and others 
>> think.
> 
> I would really appreciate a move into this direction.
> 
> BTW - Wolfgang: do you still plan to rebase &  post  your  "Configure
> U-Boot  with a Device Tree" patches? They must have grown out of sync
> terribly?

Well, not really. The patch providing access to the FDT is quite simple,
making use of it is another subject and requires a FDT aware device
interface, in the first place. Search for

 "[U-Boot-Users] using a flat device tree to drive u-boot config"

to find the last discussion on this topic.

Wolfgang.

[U-Boot] PHY lib

[Wolfgang Denk]

Dear Wolfgang,

In message <492C5744.5010205@grandegger.com> you wrote:
>
> > BTW - Wolfgang: do you still plan to rebase &  post  your  "Configure
> > U-Boot  with a Device Tree" patches? They must have grown out of sync
> > terribly?
> 
> Well, not really. The patch providing access to the FDT is quite simple,
> making use of it is another subject and requires a FDT aware device
> interface, in the first place. Search for
> 
>  "[U-Boot-Users] using a flat device tree to drive u-boot config"
> 
> to find the last discussion on this topic.

yes, I know. Maybe we should make the old stuff available in a branch
in our git repo so we can at least show  others  the  existing  code?
That  would  require  little  effort  and probably be a good base for
further discussions?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Ever try. Ever fail. No matter. Try again. Fail again.  Fail  better.
                                                        -- S. Beckett

[U-Boot] PHY lib

[Andy Fleming]

On Tue, Nov 25, 2008 at 12:31 PM, Ben Warren <biggerbadderben@gmail.com> wrote:
> Hi Michal,
> Michal Simek wrote:
>> Hi Ben,
>>
>> how does look like your propose work about PHY lib?
>>
>> Thanks,
>> Michal
>>
>>
> I'd like to have the PHY library included in the 02.2009 release.  One
> of the things I'm struggling with is how so specify MDIO busses and PHY
> addresses.  For example, is it preferable to have a bunch of
> CONFIG_PHY_ADDR_x or a board-code struct?  How to link/register PHYs
> with MDIO buses, since conceivably a board could have hardware MDIO
> and/or bit-banged MDIO, and any PHY could be on any bus.

I think the board-code should pass it in.  Each nic just needs a
pointer to its PHY.  Some boards will have hard-coded addresses, and
some will have addresses that change depending on circumstances (the
DS boards use different PHYs when they are operating in SGMII mode,
for instance).  Some boards will even have set it up so you have to
scan for a PHY.  Many PCI nics seem to require this, despite its
inherent fragility.

So I think if the board code were able to find PHY handles, then we
can let the boards decide how to get that information (and eventually
transition to pulling it out of a device tree)

Andy