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

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Message-Id: <20171213173751.12722-1-l.stach@pengutronix.de>
Date:   Wed, 13 Dec 2017 18:37:49 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, kernel@...gutronix.de,
        patchwork-lst@...gutronix.de
Subject: [PATCH 1/3] net: phy: add support to detect 100BASE-T1 capability

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.stach@...gutronix.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