linux-kernel - Re: [PATCH 3/3] net: via-rhine: add OF bus binding

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Date:	Mon, 27 Jan 2014 14:57:34 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Alexey Charkov <alchark@...il.com>
Cc:	netdev@...r.kernel.org, linux@...sktech.co.nz,
	devicetree@...r.kernel.org, rl@...lgate.ch,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] net: via-rhine: add OF bus binding

On Mon, 2014-01-27 at 15:51 +0400, Alexey Charkov wrote:
> This should make the driver usable with VIA/WonderMedia ARM-based
> Systems-on-Chip integrated Rhine III adapters. Note that these
> are always in MMIO mode, and don't have any known EEPROM.
[...]
> --- a/drivers/net/ethernet/via/Kconfig
> +++ b/drivers/net/ethernet/via/Kconfig
> @@ -19,7 +19,7 @@ if NET_VENDOR_VIA
>  
>  config VIA_RHINE
>         tristate "VIA Rhine support"
> -       depends on PCI
> +       depends on (PCI || USE_OF)
>         select CRC32
>         select MII
>         ---help---

This seems like the right thing to do, but it means you need to add
#ifdef CONFIG_PCI and #ifdef CONFIG_USE_OF around the driver structures
and related functions.

You should compile-test in configurations that have just one of those
dependencies enabled.

[...]
> --- a/drivers/net/ethernet/via/via-rhine.c
> +++ b/drivers/net/ethernet/via/via-rhine.c
[...]
> @@ -847,7 +856,8 @@ static void rhine_hw_init(struct net_device *dev, long pioaddr)
>  		msleep(5);
>  
>  	/* Reload EEPROM controlled bytes cleared by soft reset */
> -	rhine_reload_eeprom(pioaddr, dev);
> +	if (!strncmp(dev->dev.parent->bus->name, "pci", 3))
> +		rhine_reload_eeprom(pioaddr, dev);
[...]

Ew.  I think you should use dev_is_pci(), although you might also need
to guard that with #ifdef CONFIG_PCI.

Ben.

-- 
Ben Hutchings
If at first you don't succeed, you're doing about average.

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