netdev - Re: [PATCH net] ravb: Add disable 10base

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Date:	Tue, 15 Dec 2015 14:41:40 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Florian Fainelli <f.fainelli@...il.com>,
	Yoshihiro Kaneko <ykaneko0929@...il.com>,
	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: Re: [PATCH net] ravb: Add disable 10base

Hello.

On 12/14/2015 9:49 PM, Florian Fainelli wrote:

>>> From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
>>>
>>> Ethernet AVB does not support 10 Mbps transfer speed.
>>>
>>> Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
>>> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@...il.com>
>>> ---
>>>
>>> This patch is based on the master branch of David Miller's networking
>>> tree.
>>>
>>>    drivers/net/ethernet/renesas/ravb_main.c | 3 +++
>>>    1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c
>>> b/drivers/net/ethernet/renesas/ravb_main.c
>>> index b69e0c2..467d416 100644
>>> --- a/drivers/net/ethernet/renesas/ravb_main.c
>>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
>>> @@ -905,6 +905,9 @@ static int ravb_phy_init(struct net_device *ndev)
>>>            netdev_info(ndev, "limited PHY to 100Mbit/s\n");
>>>        }
>>>
>>> +    /* 10BASE is not supported */
>>> +    phydev->supported &= ~PHY_10BT_FEATURES;
>>
>>     I wonder if we should also modify 'phydev->advertising' like
>> phy_set_max_speed() does...
>
> Yes, this is a good idea. If your PHY driver uses genphy_config_advert()
> this is taken care of for you, but in case you have a buggy PHY driver,
> you should just do this yourself here.

    OK, drivers/net/phy/micrel.c uses it for almost all chips.

MBR, Sergei

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