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Subject: Re: [PATCH net-next] net: phy: realtek: add loopback support for
 RTL8211F
To:     Andrew Lunn <andrew@lunn.ch>
CC:     <f.fainelli@gmail.com>, <hkallweit1@gmail.com>,
        <linux@armlinux.org.uk>, <davem@davemloft.net>,
        <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linuxarm@huawei.com>, <kuba@kernel.org>,
        Yufeng Mo <moyufeng@huawei.com>,
        Jian Shen <shenjian15@huawei.com>
References: <1589358344-14009-1-git-send-email-tanhuazhong@huawei.com>
 <20200513131226.GA499265@lunn.ch>
From:   tanhuazhong <tanhuazhong@huawei.com>
Message-ID: <e54083ee-ed3a-115f-0856-d943dac579a8@huawei.com>
Date:   Thu, 14 May 2020 09:32:51 +0800
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On 2020/5/13 21:12, Andrew Lunn wrote:
> On Wed, May 13, 2020 at 04:25:44PM +0800, Huazhong Tan wrote:
>> From: Yufeng Mo <moyufeng@huawei.com>
>>
>> PHY loopback is already supported by genphy driver. This patch
>> adds the set_loopback interface to RTL8211F PHY driver, so the PHY
>> selftest can run properly on it.
>>
>> Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
>> Signed-off-by: Jian Shen <shenjian15@huawei.com>
>> Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
> 
> It took three people to write a 1 line patch?

Yufeng Mo is the author of this patch, since he has not right to send mail
so I just help him to do than。 If necessary, Jian Shen could be deleted.

> 
>> ---
>>   drivers/net/phy/realtek.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
>> index c7229d0..6c5918c 100644
>> --- a/drivers/net/phy/realtek.c
>> +++ b/drivers/net/phy/realtek.c
>> @@ -615,6 +615,7 @@ static struct phy_driver realtek_drvs[] = {
>>   		.resume		= genphy_resume,
>>   		.read_page	= rtl821x_read_page,
>>   		.write_page	= rtl821x_write_page,
>> +		.set_loopback   = genphy_loopback,
>>   	}, {
>>   		.name		= "Generic FE-GE Realtek PHY",
>>   		.match_phy_device = rtlgen_match_phy_device,
> 
> Do you have access to the data sheets? Can you check if the other PHYs
> supported by this driver also support loopback in the standard way?
> They probably do.
> 
> 	  Andrew
> 

We have checked the data sheet. Since we only have rtl8211f phy on our 
hand, so only support loopback on this phy.

Thanks:)

> .
>