net: phy: Add 10-BaseT1L registers

The 802.3gc specification defines the 10-BaseT1L link
mode for ethernet trafic on twisted wire pair.

PMA status register can be used to detect if the phy supports
2.4 V TX level and PCS control register can be used to
enable/disable PCS level loopback.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/mdio.h

@@ -67,6 +67,9 @@
 #define MDIO_PCS_10GBRT_STAT2	33	/* 10GBASE-R/-T PCS status 2 */
 #define MDIO_AN_10GBT_CTRL	32	/* 10GBASE-T auto-negotiation control */
 #define MDIO_AN_10GBT_STAT	33	/* 10GBASE-T auto-negotiation status */
+#define MDIO_B10L_PMA_CTRL	2294	/* 10BASE-T1L PMA control */
+#define MDIO_PMA_10T1L_STAT	2295	/* 10BASE-T1L PMA status */
+#define MDIO_PCS_10T1L_CTRL	2278	/* 10BASE-T1L PCS control */
 
 /* LASI (Link Alarm Status Interrupt) registers, defined by XENPAK MSA. */
 #define MDIO_PMA_LASI_RXCTRL	0x9000	/* RX_ALARM control */
@@ -268,6 +271,28 @@
 #define MDIO_AN_10GBT_STAT_MS		0x4000	/* Master/slave config */
 #define MDIO_AN_10GBT_STAT_MSFLT	0x8000	/* Master/slave config fault */
 
+/* 10BASE-T1L PMA control */
+#define MDIO_PMA_10T1L_CTRL_LB_EN	0x0001	/* Enable loopback mode */
+#define MDIO_PMA_10T1L_CTRL_EEE_EN	0x0400	/* Enable EEE mode */
+#define MDIO_PMA_10T1L_CTRL_LOW_POWER	0x0800	/* Low-power mode */
+#define MDIO_PMA_10T1L_CTRL_2V4_EN	0x1000	/* Enable 2.4 Vpp operating mode */
+#define MDIO_PMA_10T1L_CTRL_TX_DIS	0x4000	/* Transmit disable */
+#define MDIO_PMA_10T1L_CTRL_PMA_RST	0x8000	/* MA reset */
+
+/* 10BASE-T1L PMA status register. */
+#define MDIO_PMA_10T1L_STAT_LINK	0x0001	/* PMA receive link up */
+#define MDIO_PMA_10T1L_STAT_FAULT	0x0002	/* Fault condition detected */
+#define MDIO_PMA_10T1L_STAT_POLARITY	0x0004	/* Receive polarity is reversed */
+#define MDIO_PMA_10T1L_STAT_RECV_FAULT	0x0200	/* Able to detect fault on receive path */
+#define MDIO_PMA_10T1L_STAT_EEE		0x0400	/* PHY has EEE ability */
+#define MDIO_PMA_10T1L_STAT_LOW_POWER	0x0800	/* PMA has low-power ability */
+#define MDIO_PMA_10T1L_STAT_2V4_ABLE	0x1000	/* PHY has 2.4 Vpp operating mode ability */
+#define MDIO_PMA_10T1L_STAT_LB_ABLE	0x2000	/* PHY has loopback ability */
+
+/* 10BASE-T1L PCS control register. */
+#define MDIO_PCS_10T1L_CTRL_LB		0x4000	/* Enable PCS level loopback mode */
+#define MDIO_PCS_10T1L_CTRL_RESET	0x8000	/* PCS reset */
+
 /* EEE Supported/Advertisement/LP Advertisement registers.
  *
  * EEE capability Register (3.20), Advertisement (7.60) and