linux-kernel - Re: FEC_MPC52xx

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Date:	Wed, 31 Oct 2007 16:06:19 +0100
From:	Domen Puncer <domen.puncer@...argo.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
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
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www.telargo.com
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