[PATCH RFC net-next 09/23] net: phy: add configuration of rx clock stop mode
From: Russell King (Oracle) <hidden>
Date: 2024-11-26 13:03:44
Also in:
linux-arm-kernel
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add a function to allow configuration of the PCS's clock stop enable bit, used to configure whether the xMII receive clock can be stopped during LPI mode. Signed-off-by: Russell King (Oracle) <redacted> --- drivers/net/phy/phy.c | 25 ++++++++++++++++++++----- include/linux/phy.h | 1 + 2 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 21e0fc9a6f09..d0a9d807d48f 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c@@ -1607,6 +1607,25 @@ int phy_eee_tx_clock_stop_capable(struct phy_device *phydev) } EXPORT_SYMBOL_GPL(phy_eee_tx_clock_stop_capable); +/** + * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI + * phydev: target phy_device struct + * + * Configure whether the PHY may disable its receive clock during LPI mode, + * See IEEE 802.3 sections 22.2.2.2, 35.2.2.10, and 45.2.3.1.4. Returns 0 or + * negative error. + */ +int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable) +{ + /* Configure the PHY to stop receiving xMII + * clock while it is signaling LPI. + */ + return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, + MDIO_PCS_CTRL1_CLKSTOP_EN, + clk_stop_enable ? MDIO_PCS_CTRL1_CLKSTOP_EN : 0); +} +EXPORT_SYMBOL_GPL(phy_eee_rx_clock_stop); + /** * phy_init_eee - init and check the EEE feature * @phydev: target phy_device struct
@@ -1631,11 +1650,7 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) return -EPROTONOSUPPORT; if (clk_stop_enable) - /* Configure the PHY to stop receiving xMII - * clock while it is signaling LPI. - */ - ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, - MDIO_PCS_CTRL1_CLKSTOP_EN); + ret = phy_eee_rx_clock_stop(phydev, true); return ret < 0 ? ret : 0; }
diff --git a/include/linux/phy.h b/include/linux/phy.h
index d0491cdf54b6..467149b44a8e 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h@@ -2039,6 +2039,7 @@ int phy_unregister_fixup_for_id(const char *bus_id); int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask); int phy_eee_tx_clock_stop_capable(struct phy_device *phydev); +int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable); int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable); int phy_get_eee_err(struct phy_device *phydev); int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data);
--
2.30.2