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Message-ID: <CAGVrzcYLN0gJh8jU4j-BQa2gOq7bughKwpk30CgJY2+sL_m29A@mail.gmail.com> Date: Thu, 12 Sep 2013 10:09:45 +0100 From: Florian Fainelli <f.fainelli@...il.com> To: Rayagond K <rayagond@...avyalabs.com> Cc: netdev <netdev@...r.kernel.org> Subject: Re: XGMII support Hello, 2013/9/12 Rayagond K <rayagond@...avyalabs.com>: > Hi All, > > I was going through include/linux/phy.h file to check what all phy > interface Linux supports. The enum "phy_interface_t" has entry for > MII, GMII, TBI, SGMII, RMII etc but I didn't find entry for XGMII > interface. So my questions are following, > > 1. How to support XGMII using phylib ? phylib only needs to know about a phy_interface_t that is going to be used by your Ethernet MAC adjust_link() callback to properly configure the physical link between the MAC and the PHY. From a phylib perspective there is no knowledge of how to configure based on the *MII interface, this is the reponsibility of the Ethernet MAC driver based on the "phydev->interface". > 2. What are PHY_INTERFACE_MODE_RGMII_ID, PHY_INTERFACE_MODE_RGMII_RXID > and PHY_INTERFACE_MODE_RGMII_TXID ? They respectively stand for: "Reduced GMII with TX and RX internal delay", "Reduced GMII with RX internal delay" and "Reduced GMII with TX internal delay". In practice this is used when either the TX/RX or both clocks and data lines needs to have a different phases (90 degrees in general). -- Florian -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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