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); 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 > > As Andrew indicated the proper way to do this is do to use ethtool if > you need to this dynamically. > -- Murali Karicheri Linux Kernel, Keystone
