On 03/10/2016 01:05 PM, Florian Fainelli wrote: > 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. > Ok. Good point. I will try this. Thanks for your suggestion.
Murali >> 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? -- Murali Karicheri Linux Kernel, Keystone
