net: phy: add minimal support for QSGMII PHY

This commit adds the necessary definitions for the PHY layer to
recognize "qsgmii" as a valid PHY interface. A QSMII interface, as
defined at
http://en.wikipedia.org/wiki/Media_Independent_Interface#Quad_Serial_Gigabit_Media_Independent_Interface,
is "is a method of combining four SGMII lines into a 5Gbit/s
interface. QSGMII, like SGMII, uses LVDS signalling for the TX and RX
data and a single LVDS clock signal. QSGMII uses significantly fewer
signal lines than four SGMII busses."

This type of MAC <-> PHY connection might require special handling on
the MAC driver side, so it should be possible to express this type of
MAC <-> PHY connection, for example in the Device Tree.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: devicetree@vger.kernel.org
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Petazzoni 2014-04-15 15:50:19 +02:00 committed by David S. Miller
parent e283546c04
commit b9d12085f2
2 changed files with 4 additions and 1 deletions

View File

@ -10,7 +10,7 @@ The following properties are common to the Ethernet controllers:
- max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
the maximum frame size (there's contradiction in ePAPR).
- phy-mode: string, operation mode of the PHY interface; supported values are
"mii", "gmii", "sgmii", "tbi", "rev-mii", "rmii", "rgmii", "rgmii-id",
"mii", "gmii", "sgmii", "qsgmii", "tbi", "rev-mii", "rmii", "rgmii", "rgmii-id",
"rgmii-rxid", "rgmii-txid", "rtbi", "smii", "xgmii"; this is now a de-facto
standard property;
- phy-connection-type: the same as "phy-mode" property but described in ePAPR;

View File

@ -75,6 +75,7 @@ typedef enum {
PHY_INTERFACE_MODE_SMII,
PHY_INTERFACE_MODE_XGMII,
PHY_INTERFACE_MODE_MOCA,
PHY_INTERFACE_MODE_QSGMII,
PHY_INTERFACE_MODE_MAX,
} phy_interface_t;
@ -116,6 +117,8 @@ static inline const char *phy_modes(phy_interface_t interface)
return "xgmii";
case PHY_INTERFACE_MODE_MOCA:
return "moca";
case PHY_INTERFACE_MODE_QSGMII:
return "qsgmii";
default:
return "unknown";
}