On 10/03/16 08:48, Murali Karicheri wrote: > On 03/03/2016 07:16 PM, Florian Fainelli wrote: >> On 03/03/16 14:18, Murali Karicheri wrote: >>> Hi, >>> >>> We are using Micrel Phy in one of our board and wondering if we can force >>> the >>> Phy to disable flow control at start. I have a 1G ethernet switch connected >>> to Phy and the phy always enable flow control. I would like to configure the >>> phy not to flow control. Is that possible and if yes, what should I do in >>> the >>> my Ethernet driver to tell the Phy not to enable flow control? >> >> The PHY is not doing flow control per-se, your pseudo Ethernet MAC in >> the switch is doing, along with the link partner advertising support for >> it. You would want to make sure that your PHY device interface (provided >> that you are using the PHY library) is not starting with Pause >> advertised, but it could be supported. > > Understood that Phy is just advertise FC. The Micrel phy for 9031 advertise > by default FC supported. After negotiation, I see that Phylib provide the > link status with parameter pause = 1, asym_pause = 1. How do I tell the Phy > not > to advertise? > > I call following sequence in the Ethernet driver. > > of_phy_connect(x,y,hndlr,a,z);
Here you should be able to change phydev->advertising and phydev->supported to mask the ADVERTISED_Pause | ADVERTISED_AsymPause bits and have phy_start() restart with that which should disable pause and asym_pause as seen by your adjust_link handler. > phy_start() > > Now in hndlr() I have pause = 1, asym_pause = 1, in phy_device ptr. How can > I tell the phy not to advertise initially? -- Florian
