linux-kernel - Re: [net-next PATCH v2 03/10] net: netcp: ethss: make call to gbe_sgmii

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Message-ID: <1ef3864e-1cb7-ddf1-d03d-9c937736616f@ti.com>
Date:   Tue, 27 Mar 2018 15:39:47 -0400
From:   Murali Karicheri <m-karicheri2@...com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <robh+dt@...nel.org>, <mark.rutland@....com>,
        <ssantosh@...nel.org>, <malat@...ian.org>, <w-kwok2@...com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <davem@...emloft.net>,
        <netdev@...r.kernel.org>
Subject: Re: [net-next PATCH v2 03/10] net: netcp: ethss: make call to
 gbe_sgmii_config() conditional

On 03/27/2018 01:18 PM, Andrew Lunn wrote:
> On Tue, Mar 27, 2018 at 12:31:42PM -0400, Murali Karicheri wrote:
>> As a preparatory patch to add support for 2u cpsw hardware found on
>> K2G SoC, make call to gbe_sgmii_config() conditional. This is required
>> since 2u uses RGMII interface instead of SGMII and to allow for driver
>> re-use.
>>
>> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
>> ---
>>  drivers/net/ethernet/ti/netcp_ethss.c | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
>> index 56dbc0b..1dea891 100644
>> --- a/drivers/net/ethernet/ti/netcp_ethss.c
>> +++ b/drivers/net/ethernet/ti/netcp_ethss.c
>> @@ -2271,7 +2271,8 @@ static int gbe_slave_open(struct gbe_intf *gbe_intf)
>>  
>>  	void (*hndlr)(struct net_device *) = gbe_adjust_link;
>>  
>> -	gbe_sgmii_config(priv, slave);
>> +	if ((priv->ss_version == GBE_SS_VERSION_14) || IS_SS_ID_NU(priv))
>> +		gbe_sgmii_config(priv, slave);
> 
> Or maybe:
> 
>    if (slave->phy_node == PHY_INTERFACE_MODE_SGMII)
>    	gbe_sgmii_config(priv, slave);

Yeah. Based on my response to your other comment, this would become

if ((slave->link_interface == SGMII_LINK_MAC_PHY) &&
    (IS_SS_ID_VER_14(priv) || IS_SS_ID_NU(priv)))
	gbe_sgmii_config(priv, slave);

We can't solely depends on phy_mode here. Phy interface is one of several
interface possible. There is MAC_TO_MAC_FORCED, NO_MDIO etc. So we check the
link_interface above.

If we can agree, here is what will appear in v3

1) Add another patch to do conversion of priv->ss_version == GBE_SS_VERSION_14 check 
with a macro, IS_SS_ID_VER_14
2) modify this patch as above.

Murali
> 
> 	Andrew
> 


-- 
Murali Karicheri
Linux Kernel, Keystone