netdev - Re: [PATCH v2 2/2] phylib: Convert MDIO bitbang to new MDIO 45 format

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Date:	Fri, 21 May 2010 19:55:59 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Andy Fleming <afleming@...escale.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH v2 2/2] phylib: Convert MDIO bitbang to new MDIO 45
 format

On Fri, 2010-05-21 at 13:31 -0500, Andy Fleming wrote:
> Now that we've added somewhat more complete MDIO 45 support to the PHY
> Lib, convert the MDIO bitbang driver to use this new infrastructure.
> 
> Signed-off-by: Andy Fleming <afleming@...escale.com>
> ---
>  drivers/net/phy/mdio-bitbang.c |   29 +++++++++++++++--------------
>  1 files changed, 15 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
> index 2f6f02e..be7ae74 100644
> --- a/drivers/net/phy/mdio-bitbang.c
> +++ b/drivers/net/phy/mdio-bitbang.c
[...]
> @@ -157,11 +154,13 @@ static int mdiobb_read(struct mii_bus *bus, int phy, int devad, int reg)
>  	struct mdiobb_ctrl *ctrl = bus->priv;
>  	int ret, i;
>  
> -	if (reg & MII_ADDR_C45) {
> -		reg = mdiobb_cmd_addr(ctrl, phy, reg);
> -		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, reg);
> -	} else
> +	/* Clause 22 PHYs only use devad = 0, and Clause 45 only use nonzero */
> +	if (devad == MDIO_DEVAD_NONE)
>  		mdiobb_cmd(ctrl, MDIO_READ, phy, reg);
> +	else {
> +		mdiobb_cmd_addr(ctrl, phy, devad, reg);
> +		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, devad);
> +	}
[...]

This comment is now wrong.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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