[PATCH net-next 3/5] net: sfp: configure/destroy I2C mdiobus on transceiver plug/unplug
From: Marek Behún <kabel@kernel.org>
Date: 2020-10-28 22:16:18
Subsystem:
ethernet phy library, networking drivers, sff/sfp/sfp+ module support, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Russell King, Linus Torvalds
Instead of configuring the I2C mdiobus when SFP driver is probed, configure/destroy the mdiobus when SFP transceiver is plugged/unplugged. This way we can tell the mdio-i2c code which protocol to use for each SFP transceiver. Signed-off-by: Marek Behún <kabel@kernel.org> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Russell King <redacted> --- drivers/net/phy/sfp.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-)
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index b1f9fc3a5584..a392d5fc6ab4 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c@@ -399,9 +399,6 @@ static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) { - struct mii_bus *i2c_mii; - int ret; - if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) return -EINVAL;
@@ -409,7 +406,15 @@ static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) sfp->read = sfp_i2c_read; sfp->write = sfp_i2c_write; - i2c_mii = mdio_i2c_alloc(sfp->dev, i2c, MDIO_I2C_DEFAULT); + return 0; +} + +static int sfp_i2c_mdiobus_configure(struct sfp *sfp, enum mdio_i2c_type type) +{ + struct mii_bus *i2c_mii; + int ret; + + i2c_mii = mdio_i2c_alloc(sfp->dev, sfp->i2c, type); if (IS_ERR(i2c_mii)) return PTR_ERR(i2c_mii);
@@ -427,6 +432,12 @@ static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) return 0; } +static void sfp_i2c_mdiobus_destroy(struct sfp *sfp) +{ + mdiobus_unregister(sfp->i2c_mii); + sfp->i2c_mii = NULL; +} + /* Interface */ static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) {
@@ -1768,6 +1779,11 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) else sfp->module_t_start_up = T_START_UP; + /* Configure mdiobus */ + ret = sfp_i2c_mdiobus_configure(sfp, MDIO_I2C_DEFAULT); + if (ret < 0) + return ret; + return 0; }
@@ -1778,6 +1794,8 @@ static void sfp_sm_mod_remove(struct sfp *sfp) sfp_hwmon_remove(sfp); + sfp_i2c_mdiobus_destroy(sfp); + memset(&sfp->id, 0, sizeof(sfp->id)); sfp->module_power_mW = 0;
--
2.26.2