[PATCH v2 2/5] net: phy: micrel: Add basic support for KSZ9131

Philippe Schenker
2020-03-11T10:59:23Z

This adds basic support for the new Micrel KSZ9131 phy.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
---

drivers/net/phy/micrel_ksz90x1.c | 58 ++++++++++++++++++++++++++++++++
include/micrel.h | 2 ++
2 files changed, 60 insertions(+)

diff --git a/drivers/net/phy/micrel_ksz90x1.c b/drivers/net/phy/micrel_ksz90x1.c
index f83650b8ef6..f0032e8ce16 100644
--- a/drivers/net/phy/micrel_ksz90x1.c
+++ b/drivers/net/phy/micrel_ksz90x1.c
@@ -393,9 +393,67 @@ static struct phy_driver ksz9031_driver = {
.readext = &ksz9031_phy_extread,
};

+/*
+ * KSZ9131
+ */
+static int ksz9131_config(struct phy_device *phydev)
+{
+ /* TBD: Implement Skew values for dts */
+
+ /* add an option to disable the gigabit feature of this PHY */
+ if (env_get("disable_giga")) {
+ unsigned features;
+ unsigned bmcr;
+
+ /* disable speed 1000 in features supported by the PHY */
+ features = phydev->drv->features;
+ features &= ~(SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full);
+ phydev->advertising = phydev->supported = features;
+
+ /* disable speed 1000 in Basic Control Register */
+ bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+ bmcr &= ~(1 << 6);
+ phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, bmcr);
+
+ /* disable speed 1000 in 1000Base-T Control Register */
+ phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0);
+
+ /* start autoneg */
+ genphy_config_aneg(phydev);
+ genphy_restart_aneg(phydev);
+
+ return 0;
+ }
+
+ return genphy_config(phydev);
+}
+
+static struct phy_driver ksz9131_driver = {
+ .name = "Micrel ksz9031",
+ .uid = PHY_ID_KSZ9131,
+ .mask = MII_KSZ9x31_SILICON_REV_MASK,
+ .features = PHY_GBIT_FEATURES,
+ .config = &ksz9131_config,
+ .startup = &ksz90xx_startup,
+ .shutdown = &genphy_shutdown,
+ .writeext = &ksz9031_phy_extwrite,
+ .readext = &ksz9031_phy_extread,
+};
+
+int ksz9xx1_phy_get_id(struct phy_device *phydev)
+{
+ unsigned int phyid;
+
+ get_phy_id(phydev->bus, phydev->addr, MDIO_DEVAD_NONE, &phyid);
+
+ return phyid;
+}
+
int phy_micrel_ksz90x1_init(void)
{
phy_register(&ksz9021_driver);
phy_register(&ksz9031_driver);
+ phy_register(&ksz9131_driver);
return 0;
}
diff --git a/include/micrel.h b/include/micrel.h
index 1d121c2825b..f5126f29929 100644
--- a/include/micrel.h
+++ b/include/micrel.h
@@ -26,6 +26,7 @@
#define MII_KSZ9x31_SILICON_REV_MASK 0xfffff0

#define PHY_ID_KSZ9031 0x00221620
+#define PHY_ID_KSZ9131 0x00221640

/* Registers */
@@ -40,5 +41,6 @@ int ksz9031_phy_extended_write(struct phy_device *phydev, int devaddr,
int regnum, u16 mode, u16 val);
int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr,
int regnum, u16 mode);
+int ksz9xx1_phy_get_id(struct phy_device *phydev);

#endif
--
2.25.1