[PATCH 1/3] net: phy: add support to detect 100BASE-T1 capability

[Lucas Stach]

100BASE-T1 is the automotive ethernet standard 802.3bw-2015. Currently
we don't detect any valid modes for PHYs, which only support this
standard. Add support to detect the common 100Mbit full-duplex mode.

Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
---
 drivers/net/phy/phy_device.c | 2 ++
 include/uapi/linux/mii.h     | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 67f25ac29025..8ef48b38d97b 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1607,6 +1607,8 @@ int genphy_config_init(struct phy_device *phydev)
                if (val < 0)
                        return val;
 
+               if (val & ESTATUS_100T1_FULL)
+                       features |= SUPPORTED_100baseT_Full;
                if (val & ESTATUS_1000_TFULL)
                        features |= SUPPORTED_1000baseT_Full;
                if (val & ESTATUS_1000_THALF)
diff --git a/include/uapi/linux/mii.h b/include/uapi/linux/mii.h
index b5c2fdcf23fd..eb5cc45d23fb 100644
--- a/include/uapi/linux/mii.h
+++ b/include/uapi/linux/mii.h
@@ -121,6 +121,7 @@
 #define EXPANSION_MFAULTS      0x0010  /* Multiple faults detected    */
 #define EXPANSION_RESV         0xffe0  /* Unused...                   */
 
+#define ESTATUS_100T1_FULL     0x0080  /* Can do 100BASE-T1 Full      */
 #define ESTATUS_1000_TFULL     0x2000  /* Can do 1000BT Full          */
 #define ESTATUS_1000_THALF     0x1000  /* Can do 1000BT Half          */
 
-- 
2.11.0