Based on Linux's support by Thomas Petazzoni:
commit b9d12085f2f531fdea67f0361564e0812696227c
Author: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Date: Tue Apr 15 15:50:19 2014 +0200
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@xxxxxxxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
---
drivers/of/of_net.c | 1 +
include/linux/phy.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
index 0320c1d..086573f 100644
--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -28,6 +28,7 @@ static const char *phy_modes[] = {
[PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
[PHY_INTERFACE_MODE_RTBI] = "rtbi",
[PHY_INTERFACE_MODE_SMII] = "smii",
+ [PHY_INTERFACE_MODE_QSGMII] = "qsgmii",
};
/**
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 3229aa6..7c5d754 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -54,6 +54,7 @@ typedef enum {
PHY_INTERFACE_MODE_RGMII_TXID,
PHY_INTERFACE_MODE_RTBI,
PHY_INTERFACE_MODE_SMII,
+ PHY_INTERFACE_MODE_QSGMII,
} phy_interface_t;
#define PHY_INIT_TIMEOUT 100000
--
2.0.1
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