netdev - Re: [PATCH] MACB: Set PHY address in kernel parameters

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Date:	Wed, 31 Mar 2010 12:11:20 +0200
From:	Anders Darander <anders.darander@...arespons.se>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	Haavard Skinnemoen <hskinnemoen@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Erik Waling <erik.waling@...ftel.com>,
	Patrick McHardy <kaber@...sh.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MACB: Set PHY address in kernel parameters

* Jiri Pirko <jpirko@...hat.com> [100331 12:03]:
> Wed, Mar 31, 2010 at 09:51:42AM CEST, anders.darander@...il.com wrote:
> > 
> >-	phydev = phy_find_first(bp->mii_bus);
> >+	if (phy_addr >= PHY_MAX_ADDRESS)
> >+		phydev = phy_find_first(bp->mii_bus);
> >+	else
> >+		phydev = bp->mii_bus->phy_map[phy_addr];
> >+
> > 	if (!phydev) {
> > 		printk (KERN_ERR "%s: no PHY found\n", dev->name);
> > 		return -1;
> 
> This is really ugly :( Should be done differently, more general. I've been
> thinking about this for a while. Maybe the solution is to integrate the switch
> into DSA subsystem. See net/dsa. Not sure though...

A more general solution is always welcome...

However, although I've not tested it, I think that Marc Kleine-Budde
came up with the correct solution. That was using phy_mask, and set it
up in the *eth_data structure in the board setup code.

Thus, it seems that the needed functionality is readily available.
(Working in the embedded field, I've no problem with defining HW-related
things in the board setup code, as opposite of having it dynamically
defined).

Regards,
Anders

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